TKR-750 service manual

VHF FM REPEATER 

TKR-750 

SERVICE MANUAL 

© 2001-1 PRINTED IN JAPAN 

B51-8556-00 (N) 1435 

Knob (DC source) 

(K29-9106-04) 

Panel (Outer) 

(A62-0840-03) 

Knob (VOL) 

(K29-5389-03) 

Panel assy 

(A62-0934-03) 

Key top 

(K29-5460-02) 

Modular jack 

(E08-0543-05) 

CONTENTS 

GENERAL .................................................. 2 

SYSTEM SET-UP ...................................... 2 

OPERATING FEATURES .......................... 3 

REALIGNMENT ....................................... 11 

INSTALLATION ....................................... 13 

MODIFICATION....................................... 15 

DISASSEMBLY FOR REPAIR ................. 16 

CIRCUIT DESCRIPTION .......................... 17 

SEMICONDUCTOR DATA ...................... 23 

DESCRIPTION OF COMPONENTS ........ 25 

PARTS LIST ............................................. 27 

EXPLODED VIEW.................................... 37 

PACKING ................................................. 39 

ADJUSTMENT ........................................ 40 

TERMINAL FUNCTION ........................... 47 

WIRING .................................................... 51 

PC BOARD VIEWS 

RX PLL/VCO (X58-4780-10) ................ 53 

TX PLL/VCO (X58-4790-10) ................ 54 

DISPLAY UNIT (X54-3330-20) ............ 55 

FINAL UNIT (X45-3620-XX) ................ 59 

TX-RX UNIT (X57-6260-XX) (A/2)...... 65 

TX-RX UNIT (X57-6260-XX) (B/2) ...... 71 

SCHEMATIC DIAGRAM.......................... 77 

BLOCK DIAGRAM ................................... 89 

KES-4 (EXTERNAL SPEAKER) ............... 92 

SPECIFICATIONS .................................... 93


GENERAL / SYSTEM SET-UP 

INTRODUCTION 

SCOPE OF THIS MANUAL 

This manual is intended for use by experienced technicians 

familiar with similar types of commercial grade communications 

equipment. It contains all required service information 

for the equipment and is current as of the publication 

date. Changes which may occur after publication are 

covered by either Service Bulletins or Manual Revisions. 

These are issued as required. 

ORDERING REPLACEMENT PARTS 

When ordering replacement parts or equipment information, 

the full part identification number should be included. 

This applies to all parts : components, kits, or chassis. If the 

part number is not known, include the chassis or kit number 

of which it is a part, and a sufficient description of the required 

component for proper identification. 

PERSONNEL SAFETY 

The following precautions are recommended for personnel 

safety : 

• DO NOT transmit until all RF connectors are verified secure 

and any open connectors are properly terminated. 

• SHUT OFF and DO NOT operate this equipment near 

electrical blasting caps or in an explosive atmosphere. 

• This equipment should be serviced by a qualified technician 

only. 

SERVICE 

This radio is designed for easy servicing. Refer to the 

schematic diagrams, printed circuit board views, and alignment 

procedures contained in this manual. 

SYSTEM SET-UP 

Merchandise 

received 

Choose the type 

of transceiver 

Frequency range (MHz) 

TX/RX 146~174 

TX/RX 136~150 

RF power 

50W 

50W 

Type 

K,E 

K2 

Repeater 

programming & setup 

See page 11. 

A personal computer (IBM PC or compatible), programming interface (KPG-46), 

and programming software (KPG-66D) are required for programming. 

DC power 

supply or 

duplexer? 

NO 

YES 

Installation in the 

optional space 

External speaker? 

NO 

YES 

KES-4 installation 

Delivery 

2

OPERATING FEATURES 


1. Controls and Functions 

1-1. Front Panel 

1 

2 

3 4 5 

9 8 7 6 

1 Speaker 

2 CH/STATUS Display 

Two, 7-segment digits display the channel number or status. 

3 VOLUME control 

Rotate to adjust the volume. 

4 DC source switch 

5 Dc source indicator 

Lights green when DC source is applied from the DC 

13.6V jack (DC 13.2V jack on E type versions). Lights red 

when DC source is applied from the BACK UP battery 

terminal. 

6 MIC jack 

Connect a microphone to this 8-pin modular jack. 

7 Programmable Function keys 

Press these keys to activate their programmable functions. 

PF1 key (left side) 

PF2 key 

PF3 key 

PF4 key 

PF5 key 

PF6 key (right side) 

Default : None (No function) 

Default : Repeat disable/enable 

Default : TX disable/enable 

Default : Take over 

Default : Monitor on/off 

Default : Channel up 

8 BUSY indicator 

Lights green while a signal is being received. 

9 TX indicator 

Lights red while transmitting. 

1-2. Rear Panel 

1 

2 8 3 4 9 

7 6 5 

1 TX OUT jack 

Connect a TX antenna or a duplexer to this receptacle. 

2 CONTROL I/O jack 

Connect an external programming device or repeater 

controller to this DB-25 interface. 

3 FUSE 

Insert 15 A blade fuses into these fuse holders. 

4 RX IN jack 

Connect a RX antenna or a duplexer to this BNC receptacle. 

5 DC 13.6V (K type) / DC 13.2V (E type) jack 

Connect a 13.6 V (K type) or 13.2 V (E type) DC power 

supply to this jack. 

6 BACKUP battery terminal 

7 TEST/SPKR jack 

Test input/output jack. Connect an external speaker to 

this jack. 

8 Cooling fan 

9 Optional space 

For external DC power supply, or duplexer, etc. 

3



2. Two 7-segment LED displays 

• Channel display (1~16) : While operating normally in user 

mode. 

• “E2” is displayed when the channel data is not written. 

• When the displayed channel is contained in scan sequence, 

the right side decimal point is displayed. 

• “E3” is displayed when PLL is unlocked. 

Receiver PLL unlocked = flashing BUSY LED. 

Transmitter PLL unlocked = flashing TX LED. 

• When the displayed channel is the priority channel, the 

left side decimal point is displayed. 

• “E4” is displayed when PTT is attempted on a channel 

number that has no frequency data programmed. 

• “PC” is displayed while in PC mode. 

• “SC” is displayed while in scan mode. 

• “PG” is displayed while in firmware programming mode. 

2 decimal points displayed = 115,200bps 

1 decimal point displayed = 57,600bps 

No decimal = 38,400bps 

• “E1” is displayed when FPU data is not written. 

4



3. Programmable Functions 

TKR-750 contains many Programmable Functions tabled below. 

Programmable Function 

Description 

AUX Out 1~5 Off 

AUX Out 1 to 5 ports become deactivated, respectively. 

AUX I/O 1~6 Off 

AUX I/O 1 to 6 ports become deactivated, respectively. 

AUX Out 1~5 On 

AUX Out 1 to 5 ports become activated, respectively. 

AUX I/O 1~6 On 

AUX I/O 1 to 6 ports become activated, respectively. 

AUX Out 1~5 On/Off AUX Out 1 to 5 ports are toggled between its active and inactive states, respectively. 

AUX I/O 1~6 On/Off AUX I/O 1 to 6 ports are toggled between its active and inactive states, respectively. 

Channel 1~16 

Directly select Channel 1 to 16, respectively. 

Channel Down 

The channel decrements by one. 

Channel Up 

The channel increments by one. 

CW ID On 

The CW ID is transmitted. 

CW Message 1~8 On The CW Message 1 to 8 is transmitted, respectively. 

Display Off 

All panel LEDs are turned off except the Power LED. 

Display On 

All panel LEDs become active as normal status indicators on the repeater. 

Display On/Off 

All panel LEDs, with the exception of the Power LED, are toggled between off and their normal status on 

the repeater. 

Hold Time Enable 

The Parameter of Repeat Hold Time is enabled. 

Hold Time Disable 

The Parameter of Repeat Hold Time is disabled. 

Hold Time Disable/Enable The Parameter of Repeat Hold Time is toggled between disabled and enabled. 

Local Tx Disable 

The local mic’s PTT is disabled. 

Local Tx Enable 

The local mic’s PTT is enabled. 

Local Tx Disable/Enable The local mic’s PTT is toggled between disabled and enabled. 

Monitor Off 

The QT/DQT decoder is disabled. 

Monitor On 

The QT/DQT decoder is enabled. 

Monitor On/Off 

The QT/DQT decoder is toggled between disabled and enabled. 

Monitor Momentary 

The QT/DQT decoder is momentarily disabled. 

Multi Table Sub 

Multi Table No. Select Signalling changes to the Multi Table Sub. 

Multi Table Main 

Multi Table No. Select Signalling changes to the Multi Table Main. 

Multi Table Main/Sub Multi Table No. Select Signalling changes between Multi Table Sub and Multi Table Main. 

QT/DQT Dec Disable Disables the QT/DQT decode operation. 

QT/DQT Dec Enable Enables the QT/DQT decode operation. 

QT/DQT Dec Disable/Enable Toggles between disabling and enabling the QT/DQT decode operation. 

QT/DQT Enc Disable Disables the QT/DQT encode operation. 

QT/DQT Enc Enable 

Enables the QT/DQT encode operation. 

QT/DQT Enc Disable/Enable Toggles between disabling and enabling the QT/DQT encode operation. 

Repeat Disable 

Disables repeater operation. 

Repeat Enable 

Enables repeater operation. 

Repeat Disable/Enable Toggles between disabling and enabling repeater operation. 

Reset 

Resets to default condition set up by FPU. 

DC Power Save Off 

Activates DC Power Save Mode Off. 

DC Power Save On 

Activates DC Power Save Mode On. 

DC Power Save On/Off Toggles between DC Power Save Mode On and Off. 

5




Scan Off 

Scan On 

Scan On/Off 

Scrambler Off 

Scrambler On 

Scrambler On/Off 

Squelch Off 

Squelch On 

Squelch On/Off 

Squelch Momentary 

Take Over On/Off 

Test Tone Off 

Test Tone On 

Test Tone On/Off 

TOT Disable 

TOT Enable 

TOT Disable/Enable 

TX Disable 

TX Enable 

TX Disable/Enable 

Description 

Inhibits scanning. 

Starts scanning. 

Scanning is toggled between being enabled or inhibited. 

Disables an installed optional voice scrambler board. 

Enables an installed optional voice scrambler board. 

Toggles between enabling and disabling an installed optional voice scrambler board. 

The Squelch unmutes. 

The Squelch mutes. 

The receiver’s squelch toggles between muted and unmuted. 

The Squelch momentarily unmutes. 

Toggles between disabling and enabling remote wireline control. 

The Test Tone is inhibited. 

The Test Tone is enabled. 

Toggles between enabling and inhibiting the Test Tone. 

The Time Out Timer is disabled. 

The Time Out Timer is enabled. 

The Time Out Timer is toggled between disabled and enabled. 

The transmitter is inhibited. 

The transmitter is enabled (normal). 

Toggles between transmitter inhibited and transmitter enabled (normal). 

The following Programmable Functions are output functions used to tell the condition of the TKR-750 to an external device. 

The output functions can be assigned to only AUX Outputs as follows. 


Description 

COR (Carrier Operate Relay) This function becomes valid if an RF carrier is present. 

TOR (Tone Operate Relay) This function becomes valid if an RF carrier and the specified QT/DQT are present. 

RX Unlock 

This alarm function becomes valid if the RX PLL circuitry becomes unlocked. 

TX Unlock 

This alarm function becomes valid if the TX PLL circuitry become unlocked. 

Power Supply Lower Limit This alarm function becomes valid if the DC power supply voltage becomes less than the preset point. 

The preset point is selected in the range of 10.6V to 13.6V. 

TXS (TX Sense) 

This function becomes valid when the transmitter is keyed. 

Selectable 

AUX Outputs which are set up as Selectable appear in the available Function List for the AUX Input 

Functions and Key Assignment. 

This allows AUX Inputs and PF Keys to be used to control AUX Outputs. 

RX Signal Detect 

This function becomes valid if the RX signal level becomes less than the preset point. The preset point is 

selected in the range of –120dBm to –95dBm. 

RF Power Down Detect This alarm function becomes valid if the RF Power becomes less than about 10W. 

Fan Status 

This alarm function becomes valid when the Fan is turned on, either by sensing a high temperature 

condition or by its operating mode being set to Continuous. 

6



4. Trigger Assignment 

The Programmable Functions described above can be assigned to PF keys, AUX input, Save on/off, Start up, and Power supply 

according to following table. 

In the last column of the table, when the Programmable Functions is assigned to any PF keys, it expresses that the LED in the 

PF key turns on either conditions. “Yes” expresses that the trigger is available the Programmable Function. “No” expresses 

that the trigger is not availabale the Programmable Function. 

Trigger PF keys AUX Save Start up Power Condition of LED in he PF key on 

Function input on/off supply 

AUX Out 1~5 (I/O 1~6) Off No Yes Yes Yes Yes – 

AUX Out 1~5 (I/O 1~6) On No Yes Yes Yes Yes – 

AUX Out 1~5 (I/O 1~6) On/Off Yes Yes No No No Turns on in ON status. 

Channel 1~16, Up/Down Yes Yes Yes Yes Yes Do not turn on. 

CW ID On Yes Yes Yes Yes Yes Turns on while transmitting. 

CW Message 1~8 On Yes Yes Yes Yes Yes Turns on while transmitting. 

Display Off No Yes Yes Yes Yes – 

Display On No Yes Yes Yes Yes – 

Display On/Off Yes Yes No No No Turns on in ON status. 

Hold Time Enable No Yes Yes Yes Yes – 

Hold Time Disable No Yes Yes Yes Yes – 

Hold Time Disable/Enable Yes Yes No No No Turns on in Disable status. 

Local Tx Disable No Yes Yes Yes Yes – 

Local Tx Enable No Yes Yes Yes Yes – 

Local Tx Disable/Enable Yes Yes No No No Turns on in Disable status. 

Monitor Off No Yes Yes Yes Yes – 

Monitor On No Yes Yes Yes Yes – 

Monitor On/Off Yes Yes No No No Turns on in ON status. 

Monitor Momentary Yes No No No No Turns on in ON status. 

Multi Table Sub No Yes Yes Yes Yes – 

Multi Table Main No Yes Yes Yes Yes – 

Multi Table Main/Sub Yes Yes No No No Turns on in Sub status. 

QT/DQT Dec Disable No Yes Yes Yes Yes – 

QT/DQT Dec Enable No Yes Yes Yes Yes – 

QT/DQT Dec Disable/Enable Yes Yes No No No Turns on in Disable status. 

QT/DQT Enc Disable No Yes Yes Yes Yes – 

QT/DQT Enc Enable No Yes Yes Yes Yes – 

QT/DQT Enc Disable/Enable Yes Yes No No No Turns on in Disable status. 

Repeat Disable No Yes Yes Yes Yes – 

Repeat Enable No Yes Yes Yes Yes – 

Repeat Disable/Enable Yes Yes No No No Turns on in Disable status. 

Reset Yes Yes No No No Do not turn on. 

DC Power Save Off No Yes No Yes Yes – 

DC Power Save On No Yes No Yes Yes – 

DC Power Save On/Off Yes Yes No No No Do not turn on. 

Scan Off No Yes Yes Yes Yes – 

7



Trigger PF keys AUX Save Start up Power Condition of LED in he PF key on 

Function input on/off supply 

Scan On No Yes Yes Yes Yes – 

Scan On/Off Yes Yes No No No Turns on in ON status. 

Scrambler Off No Yes Yes Yes Yes – 

Scrambler On No Yes Yes Yes Yes – 

Scrambler On/Off Yes Yes No No No Turns on in ON status. 

Squelch Off No Yes Yes Yes Yes – 

Squelch On No Yes Yes Yes Yes – 

Squelch On/Off Yes Yes No No No Turns on in OFF status. 

Squelch Momentary Yes No No No No Turns on in OFF status. 

Take Over On/Off Yes No No No No Turns on in ON status. 

Test Tone Off No Yes Yes Yes Yes – 

Test Tone On No Yes Yes Yes Yes – 

Test Tone On/Off Yes Yes No No No Turns on in ON status. 

TOT Disable No Yes Yes Yes Yes – 

TOT Enable No Yes Yes Yes Yes – 

TOT Disable/Enable Yes Yes No No No Turns on in Disable status. 

TX Disable No Yes Yes Yes Yes – 

TX Enable No Yes Yes Yes Yes – 

TX Disable/Enable Yes Yes No No No Turns on in Disable status. 

None Yes Yes Yes Yes Yes Do not turn on. 

5. Simplex/Duplex Operation 

The Simplex/Duplex function is used to specify whether 

the channel is used as simplex (receiver muted during transmit) 

or duplex (receiver unmuted during transmit). If the 

channel has same TX/RX frequency, it can operate only in 

Simplex mode. 

6. Repeater/Base Station Operation 

The Repeat function is used to specify whether the channel 

is used as a repeater or as a base station. A repeater 

simultaneously and automatically re-transmits its received 

audio, a duplex base station has independent simultaneous 

transmit and receive paths, a simplex base station are mutually 

exclusive transmit and receive paths. 

7. Signalling Feature 

7-1. Multiple QT/DQT 

The TKR-750 can function as a multiple-QT/DQT decode/ 

encode unit for operation as a community repeater or multiple-QT/DQT 

base station. Two Multi Tables, called Main 

and Sub, can be created, each consisting of 16 decode/encode 

combinations. 

The Multi Table function enables the TKR-750 to decode 

any one of the 16 QT/DQTs pre-programmed into the Multi 

Table. When receiving a signal (repeater operation), the repeater 

uses the QT/DQT encode which corresponds to the 

decoded QT/DQT as set in the Multi Table. In the Multi 

Table, signalling pair of “No.1” (first column) is defined as 

“Primary”. A receiving signalling (if it is contained within 

No.1 to No.16) is defined “Current”. 

From No.2 to No.16, signalling pairs that can be changed 

between “Main Table” and “Sub Table” using AUX I/O 

Ports 1-4 are assigned as “Multi Table Select” and the Multi 

Table Main, the Multi Table Sub or the Multi Table Main/Sub 

function is executed. When AUX I/O Ports 1~4 are set for 

“Multi Table Select”, these are 4 bit Binary Coded Decimal 

(BCD) inputs .AUX I/O 1 is a least significant bit (LSB), and 

“1101” input (LSB on the right side) signifies the Table No.2 

and “1100” input signifies the Table No.3. 

7-2. Encode Tone in Multiple 

When Local Microphone PTT or External PTT is active 

while the repeater is in use or the duplex-base station is receiving, 

the encode signalling is determined according to 

Encode Tone in Multiple function. The simplex-base station 

always transmits the “Primary” encode QT/DQT. 

8



Current : When any PTT as described above is active 

while the repeater is in use or the duplex-base station is receiving, 

the “paired” encode QT/DQT associated with receiving 

QT/DQT is transmitted. When any PTT is active 

while the repeater or the duplex-base station is in idle period, 

the “Primary” encode QT/DQT is transmitted. 

Primary : When any PTT (provided that the Priority of any 

PTT is higher than the Priority of Repeat PTT) is active while 

the repeater is in use, the encode QT/DQT changes 

“paired” encode QT/DQT to “Primary” while continuing to 

transmit. When any PTT is active while the repeater is in 

idle period, the “Primary” encode QT/DQT is transmitted. 

In the base station, the “Primary” encode QT/DQT is always 

transmitted regardless of the receiver status. 

7-3. QT Reverse Burst Time 

During repeat with QT tones, the repeater re-transmits a 

phase-shifted burst of the QT tone (“reverse burst”) when it 

detects the radio using the repeater has un-keyed and also 

sent a reverse QT burst (squelch-tail elimination). This 

mutes a receiving radio’s speaker audio before its receiver 

circuit shuts off causing squelch tail noise in the speaker 

audio. The TKR-750 can select the time between 140 to 200 

ms that the QT reverse burst is sent. Typically this time 

should not have to be adjusted from the default value. The 

transmission of the QT reverse burst can be also inhibited if 

the QT Reverse Burst function is set to “No”. 

7-4. DQT Turn Off Code Time 

During repeat with DQT tones, the repeater re-transmits 

a specific turn-off code when it detects the radio using the 

repeater has un-keyed and also sent the turn-off code 

(squelch-tail elimination). This mutes a receiving radio’s 

speaker audio before its receiver circuit shuts off causing 

squelch tail noise in the speaker audio. 

The TKR-750 can select the time between 140 to 200ms 

that the DQT turn-off code is sent. Typically this time should 

not have to be adjusted from the default value. 

7-5. Off Hook Decode 

The TKR-750 is able to decode QT/DQT regardless 

whether the local microphone is in the on- or off-hook condition. 

When the Off Hook Decode function is enabled, the 

TKR-750 is capable of QT/DQT decode even though the microphone 

is in the off-hook condition (or a local microphone 

is not installed). 

8. Scan Feature 

8-1. Scan Operation 

Providing that the TKR-750 contains two or more non-priority 

ADD channel or one or more non-priority ADD channel 

and Priority channel, it starts scanning once the Scan On 

function is executed and displays “SC” on the 7-seg LED. 

Scanning stops temporarily if any following conditions be 

come valid. 

1) if a RF carrier and a valid QT/DQT is present. The receiving 

channel number is displayed and the received audio is 

heard from a speaker. 

2) if a RF carrier is present, providing that the Monitor On 

function is executed. 

3) if the Squelch Off function is executed. Scanning stops 

on the channel being scanned when Squelch Off is executed, 

the channel number is displayed and the received 

audio is heard from a speaker. 

4) if a local microphone’s hook is in off hook status, providing 

that the Off Hook Scan function is set to Disable. 

Scanning stops on the Revert channel, but the audio is 

not heard until a valid signal is received. 

When the received call is ended, scanning automatically 

resumes after the period set in Dropout Delay Time function 

has expired. When the Scan Off function is executed, the 

TKR-750 inhibits scanning and displays the selected channel. 

8-2. Scan Sequence 

1) Normal Scan : When no Priority channel is set, scanning 

of ADD channels is done in ascending order. 

2) Single Priority Scan : The Priority channel is set as either 

a fixed channel or a selected channel. When Priority 

channel is set, Priority channel and non Priority channel 

are scanned by turns. When scanning stops on the non 

Priority channel, calls from the Priority channel are still 

checked at set intervals while scanning is stopped. This 

operation is called Look Back and the interval period is 

selected by the Look Back Time function. 

8-3. Revert Channel 

The Revert channel is a channel that is used to transmit 

during scanning. The time from the end of transmission on 

Revert channel to the time scanning automatically resumes 

is set in Dwell Time function. The Revert channel types are 

Last Called, Last Used, Selected, Selected + TalkBack, Priority, 

and Priority + TalkBack. 

1) Last Called : The TKR-750 reverts to the channel upon 

which a call was last received even if scanning has resumed 

(power on default = selected channel). 

2) Last Used (with TalkBack) : The TKR-750 reverts to the 

channel that was last transmitted on (power on default = 

selected channel). However, if a call is received on a 

channel other than the last transmit channel and PTT is 

pressed before scanning resumes, the transceiver “talks 

back” on the current receive channel. 

3) Selected : The transceiver reverts to the channel set by 

the function prior to scan initiation. 

4) Selected+TalkBack : The TKR-750 reverts to the channel 

set by the Channel ‘X’ functions or Channel Select function 

prior to scan initiation. However, if a call is received 

on a channel other than the selected channel and PTT is 

pressed before scanning resumes, the transceiver “talks 

back” on the current receive channel. 

5) Priority : The TKR-750 always reverts to the Priority channel. 

9



6) Priority+TalkBack : The TKR-750 always reverts to the 

Priority channel. However, if a call is received on a channel 

other than the Priority channel and PTT is pressed 

before scanning resumes, the transceiver “talks back” 

on the current receive channel. 

9. CW ID and Message 

The TKR-750 contains internal automatic station identifiers. 

The CW ID (Morse code) is set and transmitted on a 

per-channel basis. The CW ID is transmitted when the interval 

period is reached (TX Interval Time function), the 

channel is changed (CW ID on Channel Change function) or 

CW ID Onfunction is executed. When CW ID is activated by 

any functions described above, it is actually sent after the 

total time of TX Delay Time (not applied to CW ID On function) 

and CW Modulation Delay Time has expired. TX Delay 

Time is a period from CW ID is activated to the transmitter is 

keyed. 

CW Modulation Delay is a period from the transmitter is 

keyed to the CW ID tone is sent. The CW ID tone is routed 

to the Receive Audio (RA) port and a speaker if the Send CW 

ID to RA function is set to Yes. The TKR-750 contains 8 

message banks for CW Message. CW Message 1 to 8 is 

transmitted on the current channel when the CW Message 

1 to 8 On function is activated, respectively. 

10. PTT Priority 

A number of keying sources can be used to cause the 

TKR-750 to transmit. 

The transmit audio path is switched according to their 

keying sources and when PTTs is simultaneously activated, 

the transmit audio path related to the PTT with higher priority 

is given priority. These are Local Microphone PTT, External 

PTT, and Repeat PTT. 

11. Time Out Timer 

The Time Out Timer function determines the period of 

time users can continuously transmit. When the selected 

period expires, the transmission is inhibited. 

12. Repeat Hold Time 

The Repeat Hold Time (hang timer) function is used to 

prevent the repeater from being repeatedly keyed and 

unkeyed in response to short message traffic. When a mobile 

transceiver unkeys, the repeater’s Hold Timer allows 

the repeater to continue transmitting for a brief period while 

waiting for a responding end user. If no valid QT/DQT is 

detected within the Hold Timer period, the transmitter is allowed 

to unkey. This function determines the period of time 

that the transmitter is allowed to remain keyed after the loss 

of a valid QT/DQT received signal. 

13. Take Over 

The Take Over function is used to disable the external 

wireline control of the repeater. When Take over function is 

enabled, the external AUX inputs and Outputs, transmit audio 

inputs and receive audio outputs, External PTT and External 

Monitor lines are disabled. All AUX Input functions 

assigned to any AUX Input stay in their current state. However 

External PTT and External Monitor switch to the “Off” 

state. 

14. Test Tone 

The Test Tone is a single-frequency audio sine wave and 

is turned On and Off by toggling Test Tone On/Off functions. 

The transmitter can be modulated without a local microphone 

by using the test tone. When Test Tone On function 

is executed and any PTT is activated, the TKR-750 transmits 

the test tone with mic mute and also routes the test tone to 

RA port. 

15. RF Power 

The TKR-750 is able to switch transmission output on a 

per-channel basis. When the TX High Power function is enabled, 

the transmission output is set to high power. 

16. Fan Action 

The TKR-750 has a cooling fan. The Fan Action function 

determines whether the fan is continuously operated or operates 

in response to high temperatures only. 

17. AUX Input and Output 

There are 6 programmable AUX I/O Ports 1~6 (pins 

20~25) and 3 programmable AUX Input Ports 1~3 (pins 4~6) 

on the rear 25 pin D-Sub connector (CONTROL I/O) and 5 

programmable AUX Output Ports 1~5 (pins 10, 11, 13~15) 

on the rear 15 pin TEST/SPKR connector. 

The 6 programmable AUX I/O pins are primarily intended 

for remote control interfaces. Each AUX I/O Port can be set 

for AUX Input, AUX Output, remote Channel Select or Multi 

Table Select types. The AUX Input Port can be set execute 

a single input function or a set of up to three functions when 

the port is activated. If the port type for an AUX I/O Ports 

1~6 is set for “AUX Input”, it will also appear AUX Input 

window for function programming. The input logic is fixed 

as active Low. 

The AUX Output Port can be set execute a single output 

function. If the port type for an AUX I/O Ports 1~6 is set for 

“AUX Output”, it will also appear AUX Output window for 

function programming. The output logic of AUX Output can 

be set as either active High or active Low by the Logic Type 

function. Active High outputs a High (5V) when the programmed 

condition becomes valid, active Low outputs a 

Low (0V) when the condition becomes valid. 

10

OPERATING FEATURES / REALIGNMENT 


18. Channel Select 

AUX I/O Ports 1~4 (1 or all 4) can each be set for “Channel 

Select” providing up to 16 channel selection capability. 

These are 1 to 4 bit Binary Coded Decimal (BCD) inputs. 

AUX I/O 1 is a least significant bit (LSB). When all of AUX I/ 

O Ports 1~4 set to Channel Select, “1110” input (LSB on 

the right side) signifies the Channel 1 and “1101” input signifies 

the Channel 2.When the Channel Select function is 

set to any AUX I/O ports, the Channel ‘X’ function (Channel 

Up, Channel Down, Channel 1, etc.)can not be set to the 

AUX Input ports, but can be set to the PF Keys. Normally 

the channel control is controlled by the Channel Select function. 

If the Take Over function is executed, the channel control 

is disabled to be controlled by the Channel Select and 

enabled to be controlled by the PF Keys. 

19. DC Power Save 

The TKR-750 has the DC Power Save feature. The DC 

Power Save Mode is activated when the DC Power Save On 

function is executed. When the DC Power Save Mode is 

activated, all panel LEDs except the Power LED are turned 

off, and the audio amplifier and the DSP becomes inactive. 

When the Display On function is executed while the repeater 

is in the DC Power Save Mode, all panel LEDs become 

active as normal status indicators on the repeater, and 

the audio amplifier and the DSP becomes active. However, 

when the Save Delay Timer A period expires, all panel LEDs 

except the Power LED are turned off and the audio amplifier 

becomes inactive again, and when the Save Delay Timer B 

period expires, the DSP becomes inactive. When the DC 

Power Save Mode is turned on or off, up to 3 functions preprogrammed 

into the Save On function or Save Off function 

are executed in sequence. 

20. Power Supply 

The TKR-750 is able to use two Power sources that are 

called Main and Backup. When the Power source changes 

from Main to Backup or from Backup to Main, up to 3 functions 

pre-programmed into the Backup Power function or 

the Main Power function are executed in sequence. 

21. Start Up 

When the TKR-750 is first turned on or is reset, up to 3 

functions pre-programmed into the Start Up function are 

executed in sequence. 

22. Optional Board 

An optional scrambler board can be installed in the TKR- 

750. Scrambler codes between 1 and 16 are available per 

channel. If the scrambler board is not to be used (although it 

is installed), set the parameter to “Off”. When any Scrambler 

code is set up and the Scrambler On function is executed, 

the scrambler board is activated. 

REALIGNMENT 

1. Modes 

User mode 

PC mode 

Mode 

User mode 

PC mode 

Firmware Programming mode 

PC programming 

mode 

PC test mode 

Firmware programming 

mode 

PC programming mode 

PC test mode 

PC tuning mode 

Function 

Use this mode for normal operation. 

Use this mode to make various settings by 

means of the FPU through the RS-232C port. 

Use to read and write frequency data and 

other features to and from the repeater. 

Use to check the repeater using the PC. 

This feature is included in the FPU. 

Use when changing the firmware program 

of the flash memory. 

2. How to Enter Each Mode 

Mode 

User mode 

PC mode 

Firmware Programming 

mode 

Operation 

Power on. 

Received commands from PC. 

[PF1] key + Power on (one second). 

3. PC Mode 

3-1. Preface 

The TKR-750 repeater is programmed by using a personal 

computer, programming interface and KPG-66D software. 

3-2. Connection Procedure 

1. Connect the TKR-750 to the personal computer with the 

interface cable. 

2. When power is applied, the user mode is entered immediately. 

When the PC sends a command, the repeater 

enters the PC mode and displays “PC” on the 7-segment 

LED. When data is being transmitted to the PC from the 

repeater, the TX LED flashes. The BUSY LED flashes 

when data from the PC is being received by the repeater. 

Note : 

• The data stored in the personal computer must match 

the model type, when it is written into the flash memory. 

• Change the TKR-750 to PC mode, then attach the interface 

cable. 

11


REALIGNMENT 

3-3. KPG-46 Description (PC Programming Interface 

Cable : Option) 

The KPG-46 is required to interface the TKR-750 to the 

computer. It has a circuit in its D-sub connector (25-pin) 

case that converts the RS-232C logic level to the TTL level. 

The KPG-46 connects the microphone connector of the 

TKR-750 to the computer’s RS-232C serial port. 

3-4. Programming Software Description 

The KPG-66D programming disk is supplied in 3-1/2" disk 

format. The software on the disk allows a user to program 

TKR-750 repeater via the programming interface cable (KPG- 

46). 

3-5. Programming With IBM PC 

Data can be programmed into the flash memory in RS- 

232C format via the microphone connector. 

KPG-66D 

Fig. 1 

IBM PC 

KPG-46 


4. Firmware Programming Mode 

4-1. Preface 

The TKR-750 uses flash memory to allow it to be easily 

upgraded when new features are released in the future. 

4-2. Connection Procedure 

Connect the TKR-750 to the personal computer (IBM PC 

or compatible) with the interface cable (KPG-46). (Connection 

is the same as in the PC mode.) 

Notes : 

You can only program firmware from the 8-pin microphone 

connector on the front panel. Using the 25-pin logic 

interface on the rear panel will not work. 

4-3. Programming 

1. Start up the programming software (Fpro. exe). 

2. Set the communications speed (normally, 115200 bps) 

and communications port in the configuration item. 

3. Set the firmware to be updated by file name item. 

4. Turn the TKR-750 power on with the [PF1] key held 

down. Hold the key down for one second until the 7- 

segment display changes to “P.G.”. When “P.G.” appears, 

release your finger from the key. 

5. Check the connection between the TKR-750 and the personal 

computer, and make sure that the TKR-750 is in the 

program mode. 

6. Press write button in the window. A window opens on 

the display to indicate progress of writing. 

7. If writing ends successfully, the TX LED on the TKR-750 

lights. 

8. If you want to continue programming other TKR-750s, 

repeat steps 3 to 6. 

Notes : 

This mode cannot entered if the firmware program mode 

is set to disable in the programming software (KPG-66D). 

4-4. Function 

If you press the [PF1] key (front panel), both decimal 

point on the 7-segment display will disappear. The writing 

speed is 38400 bps (low-speed mode). If you press the 

[PF1] key again, the right hand decimal points will light. The 

writing speed is 57600 bps (middle-speed mode). 

Note : 

Normally, write in the high-speed mode (115200 bps). 

12

INSTALLATION 


1. External Power Supply Connection 

(Rear Connectors) : See Page 3 

This unit has two external power supply connectors : 

Main DC and Backup. 

If an external DC power supply is connected to the main 

DC connector and a backup battery is connected to the 

Backup connector at the same time, the DC power supply 

switches to the battery automatically if power failure occurs. 

Therefore, the operation of the repeater can be continued. 

If the battery is used, but both the battery and power supply 

need not be connected (if an external switch is used or if 

only a solar battery is used), connect it to the Backup connector, 

not the Main DC connector. Current consumption 

can be reduced by approx. 120mA because the relay is not 

used. 

If it is installed when the temperature at the repeater site 

is below freezing, check whether the switch (relay) works 

properly after installation. 

R653 

TX-RX unit (B/2) control section 

Component side 

CN601 

1 

14 

CN604 

CN605 

R742 

CN606 

2. Voice Scrambler 

It operates only during base operation. The voice is not 

scrambled when it is repeated. 

Fig. 1 

2-1. Modification 

1) Remove R742 and R653 on the TX-RX unit (B/2) : control 

section. 

2-2. Connection 

1) The functions of pins of CN601 on the TX-RX unit (B/2) : 

control section are shown in the figure. 

2) Join the CN601 connector to the voice scrambler board 

via the E37-0808-05 connector cable. 

When the operation is checked in PC test mode after the 

modification, and the maximum deviation is adjusted, the 

voice from the local microphone is not modulated. In this 

case, remove the CN601 12-pin (PTO) cable and connect it 

to the land of the display unit (X54-333) from the voice 

scrambler. The voice from the local microphone can be 

modulated in PC test mode. 

CN601 

1 

TXI (MIC signal input) 

TXO (MIC signal output) 

RXI (RX audio signal input) 

AC (Audio control signal output) 

BC1 (Scramble code output 1) 




PTI (PTT signal input) 

CLRC (Clear code for scrambler) 

DEO (Detection signal output) 

PTO (PTT signal output) 

5C (5V output) 

GND 

14 

Voice 

scrambler 

Display 

unit 

Fig. 2 

Display unit 

Foil side 

PTO 

Fig. 3 

13


INSTALLATION 

3. External Speaker (KES-4) 

The TKR-750 has a internal built-in speaker (5W/8Ω), and 

the external speaker output from the TEST/SPKR connector 

(15-pin) on the rear of the radio is 4W/4Ω. Use external 

speaker KES-4. 

3-1. Connection for the KES-4 With the TKR-750 

■ When taking the AF output from the TEST/ 

SPKR connector (15-pin) on the rear of the radio 

The following tools are required for changing the connector. 

Fig. 4-1 

• Extracting tool 

The following extracting tool is recommended : 

Molex Inc. Order No. : 11-03-0002 

1. Remove the connector with jumper from the external 

speaker connector on the rear panel of the radio. (Fig. 4- 

1) 

Note : Save the jumper, which is required when the radio 

is used without the external speaker. 

2. Remove the terminals with the jumper from the connector 

housing holes number 9 and 12 using the extracting 

tool. 

Removing the jumper lead (Fig. 4-2) 

1) Insert the extracting tool (11-03-0002) into the connector 

while pushing the jumper lead in the direction 

of (a). 

2) Push the extracting tool into collapse the barbs of the 

crimp terminal. 

3) Pull out the lead while continuing to push the extracting 

tool in the direction (b). 

3. Reinsert the terminal with the black and white stripe lead 

into hole number 12, and the terminal with the black lead 

into hole number 6. (Fig. 4-3) 

4. Attach the connector to the external speaker connector 

on the radio. 

Note : 

Relationship between TEST/SPKR connector (15-pin) 

connection and speaker output. 

When pins 9 and 12 are shorted : Built-in internal speaker 

is used. 

When pins 9 and 12 are open and output is from pins 6 

and 12 : KES-4 is used. 

Fig. 4-2 

Fig. 4-3 

14

MODIFICATION 


1. Modification for Sinking the Collector Current Up 

Auxiliary output 1 and 2 can each be modified to sink up 

600mA of the collector current. The following modification 

should be installed when Auxiliary output 1 or 2 is used to 

control external equipment. 

1. Remove D625, R755, and R769 for Auxiliary output 1 

(D624, R756, and R770 for Auxiliary output 2) on the 

component side of the control section for TX-RX unit 

PCB. 

2. Install $Q608, $Q612, and $R761 for Auxiliary output 1 

($Q607, $Q611, and $R759 for Auxiliary output 2) on the 

component side of the control section for TX-RX unit 

PCB. 

$Q607, $Q608, $Q611, $Q612 : DTD114EKA 

$R759, $R761 : 3.9kΩ (RK73GB1J392J) chip resistor. 

3. Change R801 for Auxiliary output 1 (R797 for Auxiliary 

output 2) from 1kΩ (RK73GB1J102J) to 0Ω (R92-1252- 

05). 

2. DC Source Switch 

To prevent the power supply from turning off due to 

misoperation of the DC source switch on the front panel or 

accidents (tampering) after installation, the main unit can be 

kept on regardless of the on/off of the DC source switch on 

the front panel. 

Short the PSW land near K1 relay by soldering. 

TX-RX unit (A/2) 


By making this modification, Auxiliary output 1 and 2 can 

now sink up to 600mA each. 

CF1 

WIDE 

CF2 

NARROW 

TX-RX unit (B/2) 


PSW 

K1 

IC602 

IC623 

R756 

$Q607 

R770 

$Q611 

CN605 

Fig. 3 

$R759 $R769 

R755 R769 

$Q608 $Q612 

C681 

Fig. 1 

5V 

5V 

Add $R761 

($R759) 

3.9kΩ 

Remove 

D625 (D624) 

DA204U 

Shift 

register 

IC623 

Add $Q608 

($Q607) 

DTD114EKA 

Remove 

R755 (R756) 

0Ω 

Add $Q612 

($Q611) 

DTD114EKA 

Remove 

R769 (R770) 

0Ω 

TEST/ 

SPKR 

Fig. 2 

15


MODIFICATION / DISASSEMBLY FOR REPAIR 

3. Trickle Charge for Backup Battery 

If the external DC power supply is connected to the Main 

DC connector and a backup battery (12V rechargeable type) 

is connected to the Backup connector at the same time, the 

battery can be trickle-charged from the external DC power 

supply with a maximum current of 0.5A. 

Short the CHARGE land near R61. 

Notes : 

1. Make this modification after removing the DC power supply 

and battery for safety. 

2. When the DC power supply is connected after the modification, 

DC voltage is output to the Backup connector. 

Be careful during setup. 

3. When the backup battery is used for a long time, remove 

the battery from the repeater and recharge it because the 

trickle charge is not sufficient for recharging a completely 

discharged battery. 

DISASSEMBLY FOR REPAIR 

How to Remove the Panel Assy (ABS) 

Note : You can remove the panel assembly (ABS) without 

removing the top panel (A62-0840-03). 

1. To remove panel (TX-RX, 2 ), loose 6 screws ( 1 ). 

2. To remove panel assembly (Front, 4 ), loose 6 screws 

( 3 ). 

3. The panel assembly (ABS) is security fastened by 4 tabs 

( 5 ) on top and bottom. You can remove the panel assembly 

by pulling to front while you are pulling up the 

tabs. 

Final unit (A/2) 


CN7 BACKUP 

(ORANGE) 

K1 

CHARGE 

R61 

Fig. 4 

16

CIRCUIT DESCRIPTION 


1. Outline 

The TKR-750 is a VHF/FM repeater designed to operate 

in the frequency range of 136 to 174MHz. 

The unit consists of receiver, transmitter, phase-locked 

loop (PLL) frequency synthesizer, and control circuits. 

2. Receiver Circuit 

The receiver is double conversion super-heterodyne, designed 

to operate in the frequency range of 146MHz to 

174MHz (K,E) or 136MHz to 150MHz (K2). 

The receiver circuit located in TX-RX unit (X57-626 A/2) 

consists of the following : 2-1 front-end circuit, 2-2 first 

mixer, 2-3 IF amplifier circuit, 2-4 audio amplifier circuit, and 

2-5 squelch circuit. 

2-1. Front-end Circuit 

The front-end circuit consists of BPF L2/L3, RF amplifier 

Q1, and BPF L5/L6/L7. The helical BPF covers frequency 

ranges 146 to 174MHz (K,E) and 136 to 150MHz (K2), with a 

passband of 3.0MHz. 

The BPF L5/L6/L7 attenuates the unwanted signals, and 

sends only the necessary signal to the first mixer DBM A1. 

2-2. First Mixer 

The signal from the BPF is heterodyned with the first local 

oscillator signal from the PLL frequency synthesizer circuit 

at the first mixer DBM (A1) to become a 44.85MHz first 

intermediate frequency (IF) signal. The first IF signal is fed 

through two monolithic crystal filters (XF2; Wide, XF1; Narrow) 

to further remove spurious signals. 

2-3. IF Amplifier 

The first IF signal is amplified by Q2 and Q3, and then 

enters IC9 (FM system IC). The signal is heterodyned again 

with a second local oscillator signal (44.395MHz) with in IC9 

to become a 455kHz second IF signal. The second IF signal 

is fed through a 455kHz ceramic filter, CF1 (Wide), CF2 (Narrow) 

to further eliminate unwanted signal, and the quadrature 

detection circuit FM-detects the signal to produce a 

base-band signal and output it from pin 11. 

TX-RX unit (X57 A/2): TX-RX 

RX ANT 

IF AMP 

Q3 

D2 

SW 

MCF (Wide) 

XF2 

MCF (Narrow) 

XF1 

D1 

SW 

IF AMP 

Q2 

44.85MHz 

1st MIX 

DBM A1 

BPF 

L5,L6,L7 

RF AMP 

Q1 

BPF 

L2,L3 

RSSI 

Q4 

SW 

W/N 

44.850MHz 

FM SYSTEM IC 

IC9 

QUD 

W/N 

LPF 

IF AMP 

Q9 

IF AMP 

Q8 

RX VCO 

A3 (X58-478) 

VCO A 

VCO B 

DET W/N 

NOISE DET 

D5 

SQL 

DET 

NOISE AMP 

Q7 

CF1 (Wide) 

SW 

SW 

D4 

D3 

CF2 (Narrow) 

455kHz 

W/N 

X1 

44.395MHz 

fRX+44.85MHz 

TX-RX unit (X57 B/2): Control 

DEI DEO 

AMP 

IC608 

AINR 

IC614 

AMP 

IC619 (B/2) 

CODEC 

AOUTR 

LPF 

IC619 (A/2) RXI RXO 

IC615 

DAC 

IC622 

SW 

Q606 

MUTE 

IC629 

AF 

AMP 

RD 

ASQ 

RSSI 

IC604 

CPU 

RA 

AM 

SPM 

IC621 

INV Q605 

Fig. 1 

Receiver circuit 

INT SP 

17



2-4. Audio Amplifier 

The audio amplifier circuit is located in control section of 

TX-RX unit (X57-626 B/2). The recovered audio signal obtained 

from IC9 is amplified by IC608, input to the AINR terminal 

of CODEC IC (IC614), and audio processed by DSP 

(IC618). 

The processed audio signal from AOUTR terminal of 

IC614 is amplified by IC619 (B/2) to a sufficient level, antialiasing 

filtered by IC619 (A/2). The audio signal goes to an 

electronic volume (IC615) V3/V4, to the input of multiplexer 

IC (IC622), and is amplified to drive a loudspeaker by an audio 

power amplifier (IC629). The 4W audio output can be 

provided to external 4 ohms speaker through the 15-pin test 

connector “SPO, SPG” on the rear panel. 

2-5. Squelch Circuit 

The output signal from IC9 enters FM IC again, then 

passed through a band-pass filter. 

The noise component output from IC9 is amplified by Q7 

and rectified by D5 to produce a DC Voltage corresponding 

to the noise level. The DC voltage is sent to the analog port 

of the CPU (IC604). 

IC9 outputs a DC voltage (RSSI) corresponding to the input 

of the IF amplifier. 

3. Transmitter Circuit 

The transmitter circuit consists of the following circuits : 

3-1 microphone circuit, 3-2 modulation level adjustment circuit, 

3-3 driver and final power amplifier circuit, and 3-4 automatic 

power control circuit. 

3-1. Microphone Circuit 

The signal from the microphone is passed through AGC 

circuit located in display unit (X54-333), so that it does not 

saturate. This circuit consists of IC501, D501, D502, Q501, 

and Q502. The AGC is operated by controlling the + and – 

side levels of amplitude using the current obtained by positive 

and negative detection of the amplified audio signal. 

The audio signal goes to control section of TX-RX unit (X57- 

626 B/2) from display unit (X54-333). 

The transmit audio signal goes to the input of the multiplexer 

IC (IC605) for microphone muting. The audio signal is 

amplified by IC610, input to the AINL terminal of CODEC IC 

(IC614), and audio processed by DSP (IC618). The processed 

audio signal from the AOUTL terminal of IC614 is 

amplified by IC616 (B/2) to a sufficient level, anti-aliasing filtered 

by IC616 (A/2), and amplified by the summing amplifier 

IC611 (A/2). 

3-2. Modulation Level Adjustment Circuit 

The output of the summing amplifier IC611 (A/2) is 

passed to an electronic volume (IC615) for maximum deviation 

adjustment before being applied to a varactor diode in 

the voltage controlled oscillator (VCO) A2 located in TX-RX 

unit (X57-626 A/2). 

Display unit 

(X54 B/2) 

Display unit (X54 A/2) 

MIC JACK 

VR501 

IC501(A/2) Q501,502 

AMP 

ATT 

MI 

J601 

DET 

D501,502 

TXRX unit (X57 B/2): CONTROL 

MIC 

MIS 

TA 

IC605 (A/2) IC610 IC614 

SW 

AMP CODEC IC 

AINL 

TXI TXO 

SW 

AOUTL 

IC616 

(B/2) 

AMP 

D-SUB 

TD 

IC616 

(A/2) 

LPF 

IC605 (B/2) 

SW 

IC611 

(A/2) 

AMP 

IC615 

DAC 

MO 

MB 

TAS 

TDS 

Fig. 2 

Microphone circuit 

18



3-3. Driver and Final Power Amplifier Circuit 

The transmit signal is generated by the TX VCO (A2), 

amplified by Q11, and sent to final unit (X45-362). This amplified 

signal is amplified by Q2, Q3, and Q4, and is passed 

to the FINAL stage. The RF power amplifier consists of 

MOS FET. 

TX-RX unit (X57-626 A/2) 

STT 

Q11 

Final unit (X45-362 A/2) 

Q2 

Drive AMP 

Q4 

Drive AMP 

Q5 

Final AMP 

TX ANT 

MO 

MB 

FCT 

BUFF 

IC1 

TX VCO 

A2 

(X58-479) 

TCXO 

X3 

16.8MHz 

ATT 

Q3 

Drive AMP 

PC 

IC1 

DC 

AMP 

REF 

AMP 

IC1 

Vcont 

SW 

TEMP 

POWER ADJ 

VR1 

Q8 

D4 

CM COUPLER 

REF 

DET 

FWD 

DET 

D5 

Fig. 3 

Driver and final power amplifier circuit 

3-4. Automatic Power Control, Circuit and Transmitter 

The automatic power control (APC) circuit stabilizes the 

transmitter output power at a pre-determined level, and consists 

of forward/reflected power detector circuits, and 

switching transistor Q8. The forward/reflected power detector 

circuits detects forward RF power and reflected RF 

power to DC voltage, and consists of a CM coupling type 

detection circuit formed by a strip line, RF detector D4/D5, 

and DC amplifier IC1 (A/2). 

The voltage comparator (IC1 B/2) compares the above 

detected voltage with a reference voltage, set using the microprocessor 

and IC6 located in the TX-RX unit. An APC 

voltage proportional to the difference between the sensed 

voltage and the reference voltage appears at the output of 

IC1. This output voltage controls the gate voltage for the 

drive amplifier Q4 and final amplifier Q5, which keeps the 

transmitter output power constant. 

3-5. Fan Action Control Circuit 

If fan action is set to “Temperature”, the cooling fan is 

turned ON or OFF according to temperature. 

If the ambient temperature of the final unit exceeds 

approx. 40°C, the output from pin 6 of the temperature detection 

IC2 changes from L to H. This signal is sent to the 

CPU (IC604) by Q602 in the TX-RX unit B/2 (control section), 

and the output from pin 13 (FAS) of IC7 in the TX-RX unit A/ 

2 controlled by the CPU goes H. 

This signal turns Q9 in the final unit ON to run the cooling 

fan. It has a hysteresis of approx. 5°C by IC2. If fan action is 

set to “Continuous”, the fan operates continuously, but Q9 

stays ON. 

FAN 

CN4 

FAB 

FAG 

[Fan operation] 

OFF 

X45 A/2 X57 A/2 X57 B/2 

+B 

Q9 

IC2 

TK11050M 

OUT 6 

FAS 

VTH 

13 Q6 

IC7 

BU4094BCF 

CK, 

DT, 

STB 

Q602 

ON 

+20°C +30°C +40°C +50°C 

Fig. 4 

Fan action control circuit 

IC604 

CPU 

TEMP 

17 

19



4. PLL Frequency Synthesizer 

The PLL frequency synthesizer circuit consists of the following 

circuits : 4-1 receiver PLL circuit, 4-2 transmitter PLL 

circuit, and 4-3 unlocked detector circuit. 

4-1. Receiver PLL 

The receiver PLL circuit is located in VCO unit A3 (X58- 

478) on TX-RX unit (X57-626 A/2), and consists of VCXO X2, 

VCO’s (Q350 and Q351), a single-chip PLL IC IC300, buffer 

amplifier Q355, and high-frequency amplifier Q302. 

The VCXO generates 16.8MHz. The frequency stability is 

within ±2.0ppm (Temperature range of –30 to +60°C). The 

frequency tuning of the VCXO is done to apply a voltage to 

pin 1 of the VCXO. The output of the VCXO is applied to pin 

8 of the PLL IC through the pin 7 of the VCO. 

The first local oscillator is an upper heterodyne local oscillator, 

and the VCO oscillator frequency is 180.850 to 

218.850MHz. Two VCOs cover the two bands : Q350 covers 

the lower band and Q351 VCO covers the upper band. 

The oscillator frequency is controlled by applying the 

VCO control voltage, obtained from the phase comparator to 

the varactor diodes. 

4-2. Transmitter PLL 

The transmitter PLL circuit is located in VCO unit A2 (X58- 

479) on TX-RX unit (X57-626 A/2), and consists of VCXO X3, 

VCO’s (Q350 and Q351), a single-chip PLL IC IC300, buffer 

amplifier Q355, and high-frequency amplifier Q302. 

The VCXO generates 16.8MHz. The frequency stability is 

within ±2.0ppm (Temperature range of –30 to +60°C). The 

frequency tuning and modulation of the VCXO are done to 

apply a voltage to pin 1 of the VCXO. The output of the 

VCXO is applied to pin 8 of the PLL IC through the pin 15 of 

the VCO. 

The VCO oscillator frequency is 136.00 to 174.00MHz. 

Two VCOs cover the two bands : Q350 covers the lower 

band and Q351 VCO covers the upper band. 

The oscillator frequency is controlled by applying the 

VCO control voltage, obtained from the phase comparator to 

the varactor diodes. 

4-3. Unlock Detector Circuit 

If a pulse signal appears at the LD pin of IC300, an unlock 

condition occurs, causing the voltage applied to the pin of 

the microprocessor to go low. The names of this pin are 

LDT for TX PLL and LDR for RX PLL. When the microprocessor 

detects this condition, the transmitter is disabled. 

VCO unit (X58-478) 

TX-RX unit 

VCO unit (X58-479) 

TX-RX unit 

Q350 

Q355 

Q350 

Q355 

VCO A 

AMP 

VCO A 

AMP 

SRR 

Q354 

SW 

SW 

SW 

Q352 

Q353 

STT 

Q354 

SW 

SW 

SW 

MO 

Q352 

Q353 

MO 

MO 

MO 

VCO B 

VCO B 

Q351 

Q351 

Q300 

IC300 

Q302 

X2 

Q300 

IC300 

Q302 

X3 

LPF 

PLL-IC 

AMP 

VCXO 

LPF 

PLL-IC 

AMP 

VCXO 

CP,DP 

EPR,LDR 

CP,DP 

EPT,LDT 

µ-com 

µ-com 

IC604 

IC604 

Fig. 5 Receiver PLL Fig. 6 Transmitter PLL 

20



5. Control Circuit 

The control circuit mainly located in the control section of 

TX-RX unit (X57-626 B/2) consists of the following : 5-1 CPU, 

5-2 memory circuit, 5-3 CPU clock shift, 5-4 shift register 

circuit, 5-5 display circuit, 5-6 DSP circuit, 5-7 base-band circuit, 

5-8 RS-232C circuit, and 5-9 power supply circuit. 

5-1. CPU 

The CPU (IC604) is a 16bit single-chip microcomputer 

containing a 32k ROM and 3k RAM. This CPU controls the 

flash ROM, the DSP, the receiver circuit, the transmitter circuit, 

the control circuit, and the display circuit and transfers 

data to or from an external device. 

5-2. Memory Circuit 

IC609 has a flash ROM with a capacity of 2M bits that 

contains the control program for the CPU, the signal processing 

program for DSP and data such as channels and operating 

features. 

This program can be easily written from an external device. 

Data such as the operating status are programmed into 

the EEPROM (IC600). 

5-3. CPU Clock Shift 

There are the 14.754MHz clock for the CPU (IC604) and 

the 16.515MHz clock for the DSP (IC618) at the control section 

of TX-RX unit (X57-626). When these clocks are multiplexed 

with the reception frequency, they become an internal 

beat signal. To prevent this, by tuning Q600 and Q604 

on the clock frequency is shifted. (Shift on/off can be set 

through programming.) 

5-4. Shift Register Circuit 

Serial data is sent to the shift register (IC502 to IC505 

located in display unit, IC602, IC623, IC7 located in TX-RX 

unit) from the CPU (IC604) to control various functions in the 

unit. 

5-5. Display Circuit 

The display circuit (X54-333) contains two 7-segment 

LEDs D506, D507 (orange : see the operation manual for 

details of display), D503 (red : transmission), D504 (green : 

busy), two-color LED D505 (red : backup, green : main DC), 

LEDs in switches S501 to S506, IC502, IC503, IC504, and 

IC505 to display this model channels and states. 

IC502 to IC505 are shift registers which convert serial 

data from the CPU to parallel data and light LEDs. 

Q507, Q510, and Q511 are switching transistors which 

control two-color LED D505. 

IC506, and IC507 are three-pin power supply ICs which 

produce power used for the display circuit. 

TX-RX unit (X57 B/2): CONTROL 

IC600 

EEPROM 

IC601 

Reset IC 

14.754 

MHz 

Q600 

BEAT 

SHIFT 

16.515 

MHz 

Q600 

BEAT 

SHIFT 

X600 

SW 

IC603/606 

X601 

SW 

CPU 

INTERFACE IC 

IC614 

IC618 

DSP 

CODEC IC 

Fig. 7 

IC604 

IC609 

FLASH ROM 

IC620 

232C DRIVER 

IC615 

D/A IC 

IC602/623 

Shift Register IC 

IC613 

Control circuit 

DIVIDER 

Display unit (X54-333-20 A/2) 

PF1~6 

KEY1~5 

CLK,SOE, 

STB1 

CLK,SOE, 

STB1 

CLK,SOE, 

STB1 

CLK,SOE, 

STB1 

SI 

Shift Reg. 1 

BU4094BCFV 

SO 

SI 

Shift Reg. 2 

BU4094BCFV 

SO SI 

Shift Reg. 3 

BU4094BCFV 

SO DAT 

Shift Reg. 4 

BU4094BCFV 

SW 

SW 

SW 

SW 

SW 

SW 

KEY LAMP 

1~6 

TX 

BUSY 

Main DC/ 

BACKUP 

Fig. 8 

Display circuit 

21



5-6. DSP 

The DSP circuit filters transmit/receive audio signal and 

encode/decodes signaling (QT, DQT). This circuit consists 

of IC618, IC612, IC613, IC614, IC603, IC606, IC608, IC610, 

IC616, and IC619. 

The receive signal DET is converted from analog to digital 

by IC614 with a sampling frequency of 16.128kHz. The digitized 

audio signal is sent to DSP IC618 to process the signaling 

signal and audio signal. The processed digital audio signal 

is fed to CODEC IC614, converted from digital to analog, 

and the analog signal is output from pin 16 (AOUTR). Then, 

the audio signal is amplified by IC619 (B/2), passes through 

the IC619 (A/2) low-pass filter, and goes to an electronic volume 

IC615. 

The transmit audio signal coming from IC605 is amplified 

by IC610, fed to pin 3 (AINL) of CODEC IC614, and converted 

from analog to digital at a sampling frequency of 

16.128kHz. The digitized transmit audio signal is AGC-processed, 

pre-emphasized and filtered at 300Hz to 3kHz by 

DSP IC618, and the resulting signal is fed back to CODEC 

IC614, and converted from digital to analog, and the analog 

signal is output from pin 15 (AOUTL). The transmit signal 

from AOUTL is amplified by IC616 (B/2), passes through the 

IC616 (A/2) low-pass filter, and goes to the IC611 (A/2) summing 

amplifier. 

IC613 is a counter IC and the clock required for the 

CODEC and DSP is generated by dividing the 16.515MHz 

clock signal produced by DSP IC618. 

IC603 and IC606 are interface IC between the CPU operated 

at 5.0V and the DSP operated at 3.3V. 

5-7. Base-Band Circuit 

The base-band circuit switches between the modulation 

signal to the transmitter circuit, and remote audio and adjusts 

their levels. This circuit consists of IC605, IC607, 

IC611, IC615, and IC617. 

Modulation inputs include local microphone input, lowspeed 

data (LSD), high-speed data (HSD), external audio input 

(TA), and external data input (TD), and demodulation outputs 

include receive audio output (RA), and receive data output 

(RD). 

The multiplexer (IC605) changes signals, the electronic 

volume (IC615) adjusts the level, and the operational amplifier 

(IC607, IC611, IC617) amplifiers and sums signals. 

5-8. RS-232C Circuit 

The RS-232C circuit connects the RS-232C serial port of a 

personal computer directly to this model to perform FPU 

operation. The FPU operation can also be performed by connecting 

a programming cable (KPG-46) to the local microphone 

on the front panel. But, if the D-sub connector on the 

rear panel is used, the programming cable is not required. 

The 232C driver IC (IC620) changes the TTL-232C level. The 

firmware can only be rewritten with the local microphone on 

the front panel. 

6. DC Power Supply Circuit 

6-1. DC Source Switching Relay Circuit 

1. The final unit contains a relay (K1) for switching between 

the Main DC and Backup Battery. 

If an external power source is connected to the Main DC 

terminal, the Backup terminal is isolated by the relay. If 

the Main DC turns OFF due to power failure, it is 

switched to the Backup terminal by the relay. 

The CPU monitors which is used, Main DC or Backup 

Battery. 

2. Trickle charge circuit 

If both Main DC and Backup Battery are connected, 

trickle charging of 0.5 A max. can be performed from the 

Main DC power supply to the Battery. 

(The default is OFF. See the Modification section for information 

on the modification method.) 

The battery is charged from the Main DC with D8, D9 and 

R61. If it exceeds 0.5 A, the charging circuit is turned 

OFF by D9. 

Main 

DC 

Backup 

battery 

Fig. 9 

D8 

D9 

R61 

Land 

120mA 

K1 

(Relay) 

6-2. SB Switching Relay Circuit 

1. SB (Switched +B) is supplied through the relay (K1) in the 

TX-RX unit A/2. 

When S507 (DC source switch) in the display unit is 

turned ON, the relay (K1) is turned ON to output SB. 

2. If +B exceeds 18V, the relay is forcibly turned OFF by 

D12 and Q25 to interrupt the power and protect the main 

unit. 

+B 

R165 

D12 

R166 

Q25 

R54 

+B 

Final unit (A/2) 

TX-RX unit (A/2) 

TX-RX unit (B/2) 

BUP 16 

IC604 

CPU 

K1 

Q24 

Q601 

DC source switching relay circuit 

SB 

Land 

(PSW) 

22 

5-9. Power Supply Circuit 

The power supply circuit generates power to operate the 

CPU, DSP, flash ROM, bi-directional buffer, and base-band 

circuit. This circuit consists of IC624, IC625, IC626, IC627, 

IC628, and IC630. 

Fig. 10 

S507 

Display unit 

(Front panel) 

SB switching relay circuit

SEMICONDUCTOR DATA 


Main CPU : 30622M4-113GP (TX-RX unit IC604) 

■ Pin Function 

Pin No. Name I/O Function 


1~5 IO5~IO1 I/O Aux I/O No.5~No.1 (Acc D-sub 25 pin) 40 HLDA – Not used 

6 BYTE – 5V 

41 BCLK O Not used 

7 CNVss – GND 

42 RD O Flash ROM WR/DSP HDS1 

8 ENT O TX PLL IC enable 

43 BHE – Not used 

9 ENR O RX PLL IC enable 

44 WR O Flash ROM WR/DSP HDS2 

10 Reset I Microcomputer reset input 

45 STB2 O Control shift register STB 

11 Xout – 14.7456MHz 

46 INTx O DSP interrupt H : Off, L : On 

12 Vss – GND 

47 HCS O DSP HCS 

13 Xin – 14.7456MHz 

48 CS0 O Flash ROM CS 

14 Vcc – 5V 

49 A19 O Not used 

15 NMI – Not used 

50~59 A18~A9 O Flash ROM address bus 

16 BUP I Backup battery detect 

60 Vcc – 5V 

H : Backup, L : Main 

61 A8 O Flash ROM address bus 

17 TEMP I Temperature detect for fan action 62 Vss – GND 

H : Temp high, L : Temp low 

63~70 A7~A0 O Flash ROM address bus 

18 EPTT I Acc PTT (Acc D-sub 25 pin) 

H : Off, L : On 

71 EMON I Acc monitor (Acc D-sub 25 pin) 

H : Off, L : On 

19 CLK O Common clock 

72 LDR I RX VCO lock detect 

20 DAT O Common data 

H : Lock, L : Unlock 

21 SFT O Beat shift H : On, L : Off 

73 LDT I TX VCO lock detect 

22 LD1 O Control D/A converter LD 

H : Lock, L : Unlock 

23 STB3 O Control shift register STB 

74,75 KEY5,KEY4 O Key matrix output 

24 LD2 O TX/RX D/A converter LD 

76~78 KEY3~KEY1 I Key matrix input 

25 STB4 O TX/RX shift register STB 

79~86 D7~D0 I/O Flash ROM data bus 

26 RS O DSP reset H : Off, L : On 

87 FWD I RF power down level input 

27 SC O Squelch control (Acc D-sub 25 pin) 88 RSSI I RSSI level input 

H : Inactive, L : Active 

89 ASQ I Squelch level input 

28 PTT I Mic PTT H : Off, L : On 

90 VLI I Volume level input 

29 TXD1 O Mic TXD 

91 BATT I Power supply voltage level input 

30 RXD1 I Mic HOOK/RXD 

92 AI1 I Aux input No.1 (Acc D-sub 25 pin) 

31 SCLK O EEPROM clock 


32 SDAT I/O EEPROM data 

94 AVss – GND 

33 TXD0 O Acc TXD (Acc D-sub 25 pin) 


34 RXD0 I Acc RXD (Acc D-sub 25 pin) 

96 Vref – 5V 

35 CP O PLL IC clock 

97 AVcc – 5V 

36 DP O PLL IC data 

98 STB1 O Display shift register STB 

37 RDY I CPU ready input 

99 SOE O Shift register common OE 

38 ALE – Not used 

100 IO6 I/O Aux I/O No.6 (Acc D-sub 25 pin) 

39 HOLD – Not used 

23


SEMICONDUCTOR DATA 

DSP : 320VC5402PGE (TX-RX unit IC618) 

■ Pin Function 


1,2 NC1,NC2 – Not used (No connection) 

3 Vss – GND 

4 DVDD – VDD for I/O pins (+3.3V) 

5 A0 O Not used (No connection) 

6 HD0 I/O HPI data bus 

7~11 A1~A5 O Not used (No connection) 

12 NC3 – Not used (No connection) 

13 HAS I HPI address strobe (Pull up) 



16 CVDD – VDD for core CPU (+1.8V) 

17 HCS I HPI chip select 

18 HR/W I HPI read/write 

19 READY I Data ready (Pull up) 

20 PS O Not used (No connection) 

21 DS O Not used (No connection) 

22 IS O Not used (No connection) 

23 R/W O Not used (No connection) 

24 MSTRB O Not used (No connection) 

25 IOSTRB O Not used (No connection) 

26 MSC O Not used (No connection) 

27 XF O CODEC control 

H : Power down, L : Active 

28 HOLDA – Not used (No connection) 

29 IAQ – Not used (No connection) 

30 HOLD I Hold (Pull up) 

31 BIO I Serial data syncronize input 

32 MP/MC I Not used (Pull down) 



35~38 NC5~NC8 – Not used (No connection) 

39 HCNTL0 I HPI control 0 


41 BCLKR0 I Receive clock input 

(SCLK : 516.09375kHz) 

42 BCLKR1 – Not used (No connection) 

43 BFSR0 I Frame sync. for receiver input 

(LRCK : 16.128kHz) 


44 BFSR1 I Frame sync. for receiver input 

(LRCK : 16.128kHz) 

45 BDR0 I Serial data receive input 

46 HCNTL1 I HPI control 1 

47 BDR1 – Not used (No connection) 

48 BCLKX0 I Transmit clock input 

(SCLK : 516.09375kHz) 

49 BCLKX1 O Master clock output 

(MCLK : 4.12875MHz) 


51 HINT/TOUT1 O Boot mode select (Pull up) 


53 BFSX0 I Frame sync. for transmitter input 

(LRCK : 16.128kHz) 

54 BFSX1 I Frame sync. for transmitter input 

(LRCK : 16.128kHz) 

55 HRDY – Not used (No connection) 




59 BDX0 O Serial data transmit output 

60 BDX1 – Not used (No connection) 

61 IACK – Not used (No connection) 

62 HBIL I Byte identification (HPI) 

63 NMI I Not used (Pull up) 

64 INT0 I Command interrupt from host CPU 

65 INT1 I Not used (Pull up) 

66 INT2 I Boot mode select (Pull up) 

67 INT3 I Not used (Pull up) 




71~74 NC9~NC12 – Not used (No connection) 



77 CLKMD1 I Clock mode select (Pull down) 

78 CLKMD2 I Clock mode select (Pull up) 

79 CLKMD3 I Clock mode select (Pull down) 

24


SEMICONDUCTOR DATA / DESCRIPTION OF COMPONENTS 




82 TOUT0 – Not used (No connection) 

83 EMU0 I/O Emulator 0 (to JTAG connector) 

84 EMU1/OFF I/O Emulator 1 (to JTAG connector) 

85 TDO O Test data output (to JTAG connector) 

86 TDI I Test data input (to JTAG connector) 

87 TRST I Test reset (to JTAG connector) 

88 TCK I Test clock (to JTAG connector) 

89 TMS I Test mode select (to JTAG connector) 



92 HPIENA I Not used (Pull up) 


94 CLKOUT O Not used (No connection) 


96 X1 – 16.515MHz (System clock) 

97 X2/CLKIN – 16.515MHz (System clock) 

98 RS I DSP reset input 

99~104 D0~D5 – Not used (No connection) 

105 A6 O Not used (No connection) 












127 HDS1 I HPI data strobe 1 (Pull up) 


129 HDS2 I HPI data strobe 2 (Pull down) 






143,144 NC17,NC18 – Not used (No connection) 

Final Unit (X45-3620-XX) 

Ref No. Part name Description 

IC1 IC DC amplifier 

IC2 IC Thermostat 

IC3 IC Voltage regulator 

Q2,3 Transistor RF amplifier 

Q4 FET TX drive amplifier 

Q5 FET Final amplifier 

Q7 FET RF switch 

Q8,9 Transistor DC switch 

D1 Diode Thermal sensor 

D2 Zener diode Voltage reference 

D3 Diode Surge absorption 

D4,5 Diode RF detector 

D6 Diode Surge absorption 

D7 Zener diode Surge protector 

D8 Diode Reverse current protection 

D9 Varistor Current protector 

D51,52 Diode Reverse connection protection 

Display Unit (X54-3330-20) 


IC501 MOS IC MIC amplifier 

IC502~505 MOS IC Shift registers 

IC506,507 MOS IC Voltage regulator 

Q501,502 Transistor Level controller 

Q504 FET DC switch 

Q506 Transistor DC switch 




Q512~514 FET DC switch 



D501,502 Diode AF detector 

D503~505 LED LED 

D506,507 LED 7 segment 

D508~514 Diode Surge absorption 

D601,602 Diode Surge absorption 


25


DESCRIPTION OF COMPONENTS 

TX-RX Unit (X57-6260-XX) 


IC1,2 IC Buffer amplifier 

IC3~5 IC Voltage regulator 

IC6 IC D/A converter 

IC7 IC Shift register 

IC9 IC FM IF system 

IC10,11 IC Voltage regulator 

IC600 IC EEPROM 

IC601 IC Voltage detector 


IC603 IC Bus transceiver 

IC604 MPU CPU 

IC605 IC Multiplexer 

IC606 IC Bus transceiver 

IC607,608 IC AF amplifier 

IC609 IC Flash ROM 


IC612 IC Inverter 

IC613 IC Counter 

IC614 IC CODEC 

IC615 IC D/A converter 


IC618 MPU DSP 

IC619 IC AF amplifier 

IC620 IC RS-232C transceiver 

IC621 IC NAND gate 

IC622 IC Multiplexer 


IC624~628 IC Voltage regulator 

IC629 IC Audio amplifier 

IC630 IC Voltage regulator 

Q1~3 Transistor RF amplifier 

Q4 Transistor Wide/Narrow switch 


Q7 Transistor Noise amplifier 

Q8,9 Transistor RF amplifier 

Q10 Transistor Current control 

Q11 Transistor RF amplifier 

Q12~15 Transistor Ripple filter 

Q16~19 Transistor DC switch 

Q20 Transistor Inverter 


26 








Q606 Transistor AF mute switch 




D1~4 Diode Wide/Narrow switch 

D5 Diode Noise detection 

D7 Diode DC switch 

D8 Diode TX switch 

D11 Zener diode Surge protector 

D12 Zener diode Voltage reference 

D600 Diode Surge protector 

D601 Diode Voltage reduction 

D606~625 Diode Surge protector 


D627,628 Diode Reverse current protector 

D629 Diode Surge protector 

RX PLL/VCO Unit (X58-4780-10) 


IC300 IC PLL 

Q300~302 Transistor Buffer amplifier 

Q350,351 FET VCO OSC 


Q355 Transistor Buffer amplifier 

D350~353 Varicap Frequency control 

TX PLL/VCO Unit (X58-4790-10) 


IC300 IC PLL 

Q300,301 Transistor Active filter 


Q350,351 FET VCO OSC 



D350~353 Varicap Frequency control 

D354,355 Varicap Modulation

New Parts. indicates safety critical components. 

* 

Parts without Parts No. are not supplied. 

Les articles non mentionnes dans le Parts No. ne sont pas fournis. 

Teile ohne Parts No. werden nicht geliefert. 

1 2B ✽ A10-4037-01 CHASSIS ADC12 

2 1B ✽ A62-0836-04 PANEL TX-RX 

3 1B ✽ A62-0837-04 PANEL FINAL 

4 1D ✽ A62-0840-03 PANEL OUTER 

5 3A ✽ A62-0933-13 PANEL ASSY 

6 3C ✽ A62-0934-03 PANEL ASSY 

8 1F ✽ B10-2635-04 FRONT GLASS F-KEY 

- ✽ B10-2636-04 FRONT GLASS PC SHEET 

10 1F ✽ B11-1259-04 FILTER F-KEY 

11 1F ✽ B62-1327-10 INSTRUCTION MANUAL 

12 2C,3D ✽ B72-1797-04 MODEL NAME PLATE K 

12 2C,3D ✽ B72-1900-14 MODEL NAME PLATE K2 

12 2C,3D ✽ B72-1932-04 MODEL NAME PLATE E 

14 2C ✽ E30-3414-05 DC CORD 

15 1C ✽ E30-3418-05 ANTENNA CABLE (BNC) 

16 2C ✽ E30-3419-05 ANTENNA CABLE (N) 

17 1E ✽ E30-3427-15 DC CORD (ACC) 

18 1E E31-3228-05 LEAD WIRE WITH CONNECTOR (15P) 

- E37-0808-05 LEAD WIRE WITH CONNECTOR 

20 1B ✽ E37-0902-05 LEAD WIRE WITH TERMINAL (DC +) 

21 1B ✽ E37-0903-05 LEAD WIRE WITH TERMINAL (DC -) 

22 2C ✽ E37-0904-05 LEAD WIRE WITH CONNECTOR (D-SUB) 

23 3B ✽ E37-0905-05 LEAD WIRE WITH CONNECTOR (SP) 

24 3A ✽ E37-0906-05 LEAD WIRE WITH CONNECTOR (CONT-DISP) 

25 3A ✽ E37-0908-05 LEAD WIRE WITH CONNECTOR (11P) 

26 1B ✽ E37-0909-05 LEAD WIRE WITH CONNECTOR (8P) 

27 1B ✽ E37-0911-05 LEAD WIRE WITH CONNECTOR (3P) 

28 1B ✽ E37-0912-05 LEAD WIRE WITH MINIPIN PLUG 

29 2C ✽ E37-0913-05 LEAD WIRE WITH CONNECTOR (15P) 

30 1B ✽ E37-0934-05 LEAD WIRE WITH TERMINAL (ORANGE) 

- ✽ E37-0964-05 LEAD WIRE WITH TERMINAL (BLACK) 

- ✽ E37-0965-05 LEAD WIRE WITH TERMINAL (RED) 

33 2B ✽ E37-0967-05 FLAT CABLE (36P) 

34 2C ✽ E70-0402-05 TERMINAL BOARD 

36 1C,1E F05-1537-05 FUSE (BLADE) (15A/32V) 

37 2C F09-0445-05 CAP (D-SUB) 

38 1C F09-0471-05 FANMOTOR 

- ✽ F10-2374-04 SHIELDING PLATE (TX-RX) 

- ✽ F10-2379-04 SHIELDING CASE (TX-RX COP) 

- ✽ F10-2409-04 SHIELDING CASE (TX-RX FOIL) 

42 1C ✽ F20-3322-04 INSULATING SHEET 

44 1B G02-0576-14 FLAT SPRING 

46 3B ✽ G02-0885-13 EARTH SPRING 

47 2B,3B ✽ G10-1263-04 FIBROUS SHEET (CHASSIS) 

48 3C,2D ✽ G10-1264-04 FIBROUS SHEET (PANEL) 

49 1F ✽ G13-1801-04 CUSHION (ACC) 

50 1F ✽ G13-1802-04 CUSHION (ACC) 

PARTS LIST 

L : Scandinavia K : USA P : Canada 

Y : PX (Far East, Hawaii) T : England E : Europe 

Y : AAFES (Europe) X : Australia M: Other Areas 

Desti- 

nation 

New 

Ref. No. Address 

parts 

Parts No. Description 


57 3F ✽ H52-1621-02 ITEM CARTON CASE 

59 1E J02-0475-05 FOOT (ACC) 

60 1E ✽ J02-0492-04 FOOT 

61 1F ✽ J21-8402-04 HARDWARE FIXTURE (ACC) 

62 1E ✽ J59-0302-05 GROMMET 

64 1E K01-0418-05 HANDLE (ACC) 

65 3A K29-5389-03 KNOB (VOL) 

66 3A ✽ K29-5460-02 KEY TOP 

67 3A ✽ K29-9106-04 KNOB (DC SOURCE) 


A 2C N09-2292-05 HEXAGON HEAD SCREW 

B 2C N15-1030-46 FLAT WASHER 

C 1C,2C N30-2606-46 PAN HEAD MACHINE SCREW 

D 2A,1E N30-4006-46 PAN HEAD MACHINE SCREW 

E 2B,2C N30-4014-46 PAN HEAD MACHINE SCREW 


FINAL UNIT (X45-3620-XX) 

F 1C ✽ N30-4020-45 PAN HEAD MACHINE SCREW 

G 2C N32-3006-46 FLAT HEAD MACHINE SCREW 

H 3B N32-4008-45 FLAT HEAD MACHINE SCREW 

J 1B N33-3006-45 OVAL HEAD MACHINE SCREW 

K 1E ✽ N35-3006-45 BINDING HEAD MACHINE SCREW 

L 2C N35-3014-46 BINDING HEAD MACHINE SCREW 

M 1C N35-4006-45 BINDING HEAD MACHINE SCREW 

N 1B,3B ✽ N67-3008-46 PAN HEAD SEMS SCREW W 

O 1C,2C N87-2606-46 BRAZIER HEAD TAPTITE SCREW 

P 3A ✽ N87-3005-45 BRAZIER HEAD TAPTITE SCREW 

Q 2A,2B N87-3006-46 BRAZIER HEAD TAPTITE SCREW 

69 3A T07-0247-05 SPEAKER 

FINAL UNIT (X45-3620-XX) -10 : K,E -11 : K2 

C1,2 CK73GB1H102K CHIP C 1000PF K 

C3 C90-2146-05 ELECTRO 100UF 25WV 

C7 CK73GB1H102K CHIP C 1000PF K 


C11 CC73GCH1H470J CHIP C 47PF J K,E 

C11 CC73GCH1H680J CHIP C 68PF J K2 


C13 CK73FB1E104K CHIP C 0.10UF K 


C16 CK73FB1H102K CHIP C 1000PF K 


C19 C93-0601-05 CHIP C 680PF K 

C21 C93-0565-05 CHIP C 27PF J K2 

C21 C93-0566-05 CHIP C 33PF J K,E 

C22 C93-0570-05 CHIP C 68PF J 



C29 C93-0603-05 CHIP C 1000PF K 

C30,31 C93-0600-05 CHIP C 560PF K 

C32 C93-0603-05 CHIP C 1000PF K 

Desti- 

nation 

New 


parts 


53 1E H25-0029-04 PROTECTION BAG (60/110/0.07) 

54 1F H25-0747-04 PROTECTION BAG (250X350) 

55 1E H25-0762-04 PROTECTION BAG (120X300) 

56 1F ✽ H25-2328-04 PROTECTION BAG (80/250/0.07) 

C33 CK73FB1C105K CHIP C 1.0UF K 




27


PARTS LIST 


C42 CK73FB1H103K CHIP C 0.010UF K 


C46 C93-0603-05 CHIP C 1000PF K 

C47 CM73F2H121J CHIP C 120PF J K,E 

C48,49 C93-0563-05 CHIP C 18PF J K,E 

L9-11 L34-4520-05 AIR-CORE COIL 

L12 L34-4523-05 AIR-CORE COIL 

L13 L40-3375-34 SMALL FIXED INDUCTOR (33NH) 

L15 L40-4785-34 SMALL FIXED INDUCTOR (470NH) K,E 

L15 L40-8285-34 SMALL FIXED INDUCTOR (820NH) K2 


New 


Destiparts 

nation 

parts 


New 


Desti- 

nation 

C50,51 C93-0565-05 CHIP C 27PF J K2 

C54 C93-0601-05 CHIP C 680PF K 

C55 CK73GB1H103K CHIP C 0.010UF K 






C69 C93-0564-05 CHIP C 22PF J 

C71,72 C93-0564-05 CHIP C 22PF J K,E 

C71,72 C93-0565-05 CHIP C 27PF J K2 

C74 C93-0567-05 CHIP C 39PF J 

C77 C93-0565-05 CHIP C 27PF J 

C80-87 CK73GB1H102K CHIP C 1000PF K 


C91 C92-0777-05 ELECTROLYTIC CAP 

C92 C93-0601-05 CHIP C 680PF K 

C94 CC73GCH1H100D CHIP C 10PF D 

C96 CC73FCH1H270J CHIP C 27PF J 

C97 CC73FCH1H040C CHIP C 4.0PF C 




C110 C92-0628-05 CHIP-TAN 10UF 10WV 


C112 CM73F2H271J CHIP C 270PF J K2 







C138,139 CM73F2H181J CHIP C 180PF J K,E 


C140 CC73FCH1H100D CHIP C 10PF D 

C141 C93-0601-05 CHIP C 680PF K 

C142 CC73FCH1H020C CHIP C 2.0PF C K2 

C151,152 CM73F2H390J CHIP C 39PF J K,E 

C151,152 CM73F2H680J CHIP C 68PF J K2 

CN1,2 E04-0154-05 PIN SOCKET 

CN3 E40-5632-05 PIN ASSY 



CN6-8 E23-0462-05 TERMINAL 

F1 F53-0217-05 FUSE 

CN51,52 J13-0071-05 FUSE HOLDER 








L16,17 L40-8275-92 SMALL FIXED INDUCTOR (82NH) K,E 

R1 RK73FB2A100J CHIP R 10 J 1/10W 

R6 RK73GB1J220J CHIP R 22 J 1/16W 

R7 RK73GB1J472J CHIP R 4.7K J 1/16W 






R15 R92-1217-05 CHIP R 0 OHM 

R17 RK73FB2A183J CHIP R 18K J 1/10W 

R18 RK73EB2B180J CHIP R 18 J 1/8W K2 

R18 RK73EB2B330J CHIP R 33 J 1/8W K,E 


R20,21 R92-1252-05 CHIP R 0 OHM 

R22 R92-1215-05 CHIP R 470 J 1/2W 



R25 RK73GB1J473J CHIP R 47K J 1/16W 



R28 RK73GB1J105J CHIP R 1.0M J 1/16W 





R34,35 RK73GB1J393J CHIP R 39K J 1/16W 

R36 R92-1252-05 CHIP R 0 OHM 

R37 R92-0670-05 CHIP R 0 OHM 


R40 RK73FB2A101J CHIP R 100 J 1/10W K2 

R40 RK73FB2A121J CHIP R 120 J 1/10W K,E 

R41 R92-1252-05 CHIP R 0 OHM 




R49 R92-1217-05 CHIP R 0 OHM 

R50 RK73EB2B222J CHIP R 2.2K J 1/8W 

R52,53 RK73GB1J102J CHIP R 1.0K J 1/16W 


R56 R92-1317-05 CHIP R 18 J 1W 





R61 ✽ R92-2687-05 RESISTOR 

R62,63 R92-0670-05 CHIP R 0 OHM 

R64 RK73GB1J5R6J CHIP R 5.6 J 1/16W K2 

R65,66 RK73GB1J821J CHIP R 820 J 1/16W K2 

R68 RK73EB2B331J CHIP R 330 J 1/8W 

VR1 R12-6427-05 TRIMMING POT. (47K) 

K1 ✽ S76-0426-05 RELAY 

D1 1SS226 DIODE 

28

PARTS LIST 

D2 02DZ5.1(Y) ZENER DIODE 


D4,5 HSM88AS DIODE 


D7 ZSA5A27 ZENER DIODE 



DISPLAY UNIT (X54-3330-20) 

TX-RX UNIT (X57-6260-XX) 




R516 R92-2565-05 RESISTOR 

R517 R92-2023-05 CHIP R 820 J 1/2W 


New 


Destiparts 

nation 

parts 


New 


Desti- 

nation 

D8 RB051L-40 DIODE 

D9 MINISMDC050-02 VARISTOR 

D51,52 DSA3A1 DIODE 

IC1 TA75W01FU MOS IC 

IC2 ✽ TK11050M ANALOG IC 

IC3 NJM78L05UA BI-POLAR IC 

Q2 2SC3356(R24) TRANSISTOR 

Q3 2SC3357 TRANSISTOR 

Q4 2SK3075 FET 

Q5 ✽ 2SK3478-22 FET 

Q7 2SK1824 FET 

Q8 2SC4116(Y) TRANSISTOR 

Q9 DTD123EK DIGITAL TRANSISTOR 

TH1 ✽ PTH9M04BE471TS THERMISTOR 

DISPLAY UNIT (X54-3330-20) 

D503-505 B30-2151-05 LED (RED/GREEN) 


C502,503 C92-0501-05 CHIP-TAN 1.5UF 10WV 

C504,505 CK73GB1C104K CHIP C 0.10UF K 

C506 CC73GCH1H470J CHIP C 47PF J 




C511,512 CK73GB1E103K CHIP C 0.010UF K 

C513-518 CC73GCH1H101J CHIP C 100PF J 



C522 CK73GB1C104K CHIP C 0.10UF K 

C523 ✽ CK73FB1E334K CHIP C 0.33UF K 



C526 ✽ CK73FB1E334K CHIP C 0.33UF K 






CN501 ✽ E40-6140-05 PIN ASSY 

CN502 ✽ E40-6102-05 PIN ASSY 

CN601 ✽ E40-6141-05 PIN ASSY 

J601 E08-0877-05 MODULAR JACK 

- J31-0543-05 COLLAR (LH-5-1.5) 

CP501-504 RK75GB1J471J CHIP-COM 470 J 1/16W 

R502,503 R92-1252-05 CHIP R 0 OHM 







R519 R92-2565-05 RESISTOR 

R520-526 R92-2023-05 CHIP R 820 J 1/2W 

R529-540 RK73GB1J102J CHIP R 1.0K J 1/16W 

R541-544 RK73GB1J103J CHIP R 10K J 1/16W 




VR501 R32-0643-05 SEMI FIXED VARIABLE RESISTOR 

VR601 R31-0630-05 VARIABLE RESISTOR 

S501-506 S70-0410-15 TACT SWITCH 

S507 S68-0410-05 PUSH SWITCH 

D501,502 HSM88AS DIODE 

D506,507 ✽ LA-501DD LED 

D508-514 DA204U DIODE 

D601,602 DA204U DIODE 

D603 ✽ MINISMD020 VARISTOR 

IC501 NJM4558E MOS IC 

IC502-505 BU4094BCFV MOS IC 

IC506,507 TA78L05F MOS IC 


Q502 2SA1586(Y,GR) TRANSISTOR 

Q504 UPA672T FET 

Q506 DTA114EUA DIGITAL TRANSISTOR 

Q507 UPA672T FET 


Q510,511 DTA114EUA DIGITAL TRANSISTOR 

Q512-514 UPA672T FET 

Q516-519 UPA672T FET 

Q521-524 UPA672T FET 

Q525 2SK1824 FET 

TX-RX UNIT (X57-6260-XX) -10 : K,E -11 : K2 

C1 CC73GCH1H060D CHIP C 6.0PF D 


C3 CC73GCH1H020C CHIP C 2.0PF C 

C4 CC73GCH1H0R5C CHIP C 0.5PF C 

C5 CC73GCH1H060D CHIP C 6.0PF D K,E 

C5 CC73GCH1H080D CHIP C 8.0PF D K2 









C14 CC73GCH1H0R5C CHIP C 0.5PF C 






29


PARTS LIST 



C19 CC73GCH1H220J CHIP C 22PF J K2 










New 


Destiparts 

nation 

parts 


New 


Desti- 

nation 

C24 C92-0519-05 CHIP-TAN 1.0UF 25WV 









C38,39 CC73GCH1H680J CHIP C 68PF J 

C40,41 CK73GB1H103K CHIP C 0.010UF K 

C42,43 CC73GCH1H030C CHIP C 3.0PF C 






C52 CK73GB1H103J CHIP C 0.010UF J 








C61 CC73GCH1H080D CHIP C 8.0PF D 





C68-70 CK73GB1C104K CHIP C 0.10UF K 









C80,81 C92-0628-05 CHIP-TAN 10UF 10WV 

C82-84 CK73GB1H103K CHIP C 0.010UF K 





C89,90 CK73GB1H103J CHIP C 0.010UF J 






C102-105 CC73GCH1H100D CHIP C 10PF D 





C124,125 C92-1341-05 ELECTRO 100UF 16WV 





C136-139 C90-4016-05 ELECTROLYTIC CAP 












C154 C92-0560-05 CHIP-TAN 10UF 6.3WV 


























C212,213 CC73GCH1H050C CHIP C 5.0PF C K,E 

C212,213 CC73GCH1H060D CHIP C 6.0PF D K2 





C616 CK73GB1E103K CHIP C 0.010UF K 





30

PARTS LIST 














New 


Destiparts 

nation 

parts 


New 


Desti- 

nation 



















C697-702 C92-0628-05 CHIP-TAN 10UF 10WV 




C707-709 CK73GB1E103K CHIP C 0.010UF K 































C750,751 CK73GB1E103K CHIP C 0.010UF K 







C769-771 C92-0560-05 CHIP-TAN 10UF 6.3WV 




C775-779 C92-0519-05 CHIP-TAN 1.0UF 25WV 

C780-782 CK73FB1C105K CHIP C 1.0UF K 






C789 CE04EW1E331M ELECTRO 330UF 25WV 















C814 C92-0777-05 ELECTROLYTIC CAP 












CN1 E04-0154-05 PIN SOCKET 


CN3 E04-0154-05 PIN SOCKET 


CN14 E40-6009-05 FLAT CABLE CONNECTOR 

CN15 E40-5703-05 PIN ASSY 

CN16 E40-5632-05 PIN ASSY 

CN18,19 E04-0154-05 PIN SOCKET 

CN600 ✽ E40-6102-05 PIN ASSY 

CN601 E40-5701-05 PIN ASSY 

CN602 E40-6009-05 FLAT CABLE CONNECTOR 

31


PARTS LIST 


CN603 E40-5887-05 PIN ASSY 

CN604 E40-5702-05 PIN ASSY 

CN605 E40-5704-05 PIN ASSY 

CN606 E40-5960-05 PIN ASSY 

A4-8 F11-0844-05 SHIELDING CASE 

F1 F53-0217-05 FUSE 

CF1 L72-0366-05 CERAMIC FILTER 

CF2 L72-0376-05 CERAMIC FILTER 


L2,3 ✽ L34-4666-05 COIL 

L4 L40-1295-34 SMALL FIXED INDUCTOR (1.2UH) 

L5-7 ✽ L34-4666-05 COIL 






L13 L40-1005-34 SMALL FIXED INDUCTOR (10UH) 

L14 L34-4527-05 COIL 

L15 L34-4526-05 COIL 

L16 L34-4527-05 COIL 

L17,18 L34-4526-05 COIL 

L19 L34-4527-05 COIL 





L24 L34-4530-05 COIL 



L27,28 L40-1005-34 SMALL FIXED INDUCTOR (10UH) 

L29-31 L40-3375-34 SMALL FIXED INDUCTOR (33NH) 



L34-38 L92-0140-05 FERRITE CHIP 

L39 L92-0158-05 FERRITE CHIP 



L600-613 L92-0140-05 FERRITE CHIP 

X1 L77-1762-05 CRYSTAL RESONATOR (44.395MHZ) 

X2,3 ✽ L77-1848-05 VCXO (16.8MHZ) 

X600 L78-0431-05 RESONATOR (14.7456M) 

X601 L77-1799-05 CRYSTAL RESONATOR (16.515MHZ) 

XF1 L71-0513-05 MCF (44.85MHZ NARR) 

XF2 L71-0512-05 MCF (44.85MHZ WIDE) 

CP600,601 R90-0725-05 MULTI-COMP 1K X2 

CP602 R90-0724-05 MULTI-COMP 1K X4 

CP603 R90-1019-05 MULTI-COMP 100 X2 


CP606 R90-0719-05 MULTI-COMP 4.7K X2 


CP609 R90-1019-05 MULTI-COMP 100 X2 

CP610,611 R90-0750-05 MULTIPLE RESISTOR 

CP612-614 R90-0725-05 MULTI-COMP 1K X2 

CP615-619 R90-0750-05 MULTIPLE RESISTOR 












R14,15 RK73GB1J271J CHIP R 270 J 1/16W 


R17 R92-0670-05 CHIP R 0 OHM 







R31 RK73GB1J5R6J CHIP R 5.6 J 1/16W 







R38 R92-1252-05 CHIP R 0 OHM 










R51 R92-1252-05 CHIP R 0 OHM 




























New 


Destiparts 

nation 

parts 


New 


Desti- 

nation 

32

PARTS LIST 


R83 R92-1252-05 CHIP R 0 OHM 


R90 R92-1252-05 CHIP R 0 OHM 




R639 R92-1252-05 CHIP R 0 OHM 


R641 R92-1252-05 CHIP R 0 OHM 




New 


Destiparts 

nation 

parts 


New 


Desti- 

nation 









R104 R92-0670-05 CHIP R 0 OHM 

R106 R92-1252-05 CHIP R 0 OHM 



R111 RK73GB1J5R6J CHIP R 5.6 J 1/16W 










R139-142 R92-1252-05 CHIP R 0 OHM 













R601 R92-0670-05 CHIP R 0 OHM 






R607-613 R92-1252-05 CHIP R 0 OHM 


R615 R92-1252-05 CHIP R 0 OHM 


R618 R92-1252-05 CHIP R 0 OHM 



R623,624 R92-1252-05 CHIP R 0 OHM 


R629 R92-1252-05 CHIP R 0 OHM 




R637 R92-1252-05 CHIP R 0 OHM 





R653,654 R92-0670-05 CHIP R 0 OHM 




















R691-693 R92-1252-05 CHIP R 0 OHM 





R699 R92-1252-05 CHIP R 0 OHM 


R701 R92-1252-05 CHIP R 0 OHM 


R703 R92-1252-05 CHIP R 0 OHM 













R723,724 R92-1252-05 CHIP R 0 OHM 


R727 R92-1252-05 CHIP R 0 OHM 





R733 R92-1252-05 CHIP R 0 OHM 


33


PARTS LIST 













New 


Destiparts 

nation 

parts 


New 


Desti- 

nation 


R742 R92-0670-05 CHIP R 0 OHM 





R749-752 R92-1252-05 CHIP R 0 OHM 


R755,756 R92-0670-05 CHIP R 0 OHM 









R769,770 R92-0670-05 CHIP R 0 OHM 




R774 RK73GB1J105J CHIP R 1.0M J 1/16W 




























R802 RK73FB2A2R2J CHIP R 2.2 J 1/10W 








K1 S76-0401-05 RELAY 

D1-4 DAN235K DIODE 

D5 MA742 DIODE 


D8 DAN235K DIODE 

D11 02DZ5.1(Y) ZENER DIODE 

D12 02DZ18(X,Y) ZENER DIODE 

D600 DA204U DIODE 

D601 MA2S111 DIODE 

D606-625 DA204U DIODE 

D626 MINISMDE190 VARISTOR 

D627,628 1SS355 DIODE 

D629 DA204U DIODE 




IC4 NJM7808FA BI-POLAR IC 

IC5 AN8009M MOS IC 

IC6 M62354GP MOS IC 

IC7 BU4094BCF MOS IC 

IC9 ✽ TK14489V BI-POLAR IC 

IC10 TA7808F ANALOG IC 


IC600 AT2408N10SI2.5 ROM IC 

IC601 RH5VL42C MOS IC 

IC602 BU4094BCFV MOS IC 

IC603 TC74LVX4245FS MOS IC 

IC604 ✽ 30622M4-113GP MPU 

IC605 BU4053BCF MOS IC 

IC606 TC74LVX4245FS MOS IC 


IC608 TA75S01F MOS IC 

IC609 AT29C020-90TI ROM IC 

IC610 TA75S01F MOS IC 


IC612 TC7S04FU MOS IC 

IC613 TC74VHC4040FT MOS IC 

IC614 AK4550VT MOS IC 

IC615 M62364FP MOS IC 

IC616,617 NJM4558E MOS IC 

IC618 320VC5402PGE MPU 

IC619 TC75W51FU MOS IC 

IC620 ✽ ADM202EARN MOS IC 



IC623 BU4094BCFV MOS IC 

IC624 XC62FP1802P MOS IC 

IC625,626 XC62FP3302P MOS IC 

IC627,628 TA78L05F MOS IC 

IC629 3B LA4422 BI-POLAR IC 

IC630 TA78L05F MOS IC 

34

PARTS LIST 

Q1,2 2SC3357 TRANSISTOR 

Q3 2SC3356(R24) TRANSISTOR 

Q4 DTC144EUA DIGITAL TRANSISTOR 



C359 CC73GCH1H080B CHIP C 8.0PF B 

C360,361 CK73FB1C474K CHIP C 0.47UF K 



C366 CC73GCH1H180G CHIP C 18PF G 



RX PLL/VCO (X58-4780-10) 


New 


Destiparts 

nation 

parts 


New 


Desti- 

nation 

Q7 2SC4617(S) TRANSISTOR 



Q10 2SA1586(Y,GR) TRANSISTOR 


Q12-15 2SC4116(GR) TRANSISTOR 

Q16 2SB1132(Q,R) TRANSISTOR 


Q18 2SB1386(R) TRANSISTOR 

Q19,20 DTC114EUA DIGITAL TRANSISTOR 


Q24 DTD114EK DIGITAL TRANSISTOR 


Q600 2SK1824 FET 


Q602 2SK1824 FET 


Q604 2SK1824 FET 


Q606 DTC363EK DIGITAL TRANSISTOR 


Q610 2SJ506(S) FET 


TH1 157-503-53006 THERMISTOR 

A1 W02-1939-05 DBM 

RX PLL/VCO (X58-4780-10) 




C308-310 CK73FB1E104K CHIP C 0.10UF K 

C311 C92-0001-05 CHIP C 0.1UF 35WV 



























C374,375 CC73GCH1H010B CHIP C 1.0PF B 


C379 CC73GCH1H100C CHIP C 10PF C 


TC350,351 ✽ C05-0396-05 CERAMIC TRIMMER CAP (8P) 

CN300 E40-5699-05 PIN ASSY 

CN350 E40-5755-05 PIN ASSY 

CN351 ✽ E40-6098-05 PIN ASSY 

- ✽ F10-2377-04 SHIELDING CASE 


L301,302 L40-3975-34 SMALL FIXED INDUCTOR (39NH) 


L350-355 L33-1268-15 SMALL FIXED INDUCTOR 

L356,357 ✽ L34-4612-05 AIR-CORE COIL 




R301-304 RK73GB1J101J CHIP R 100 J 1/16W 

R305 R92-1252-05 CHIP R 0 OHM 










R316 RK73FB2A152J CHIP R 1.5K J 1/10W 

R317,318 R92-1252-05 CHIP R 0 OHM 





R350-353 R92-1252-05 CHIP R 0 OHM 










D350-353 1SV282 VARIABLE CAPACITANCE DIODE 

IC300 SA7025DK MOS IC 

35


RX PLL/VCO (X58-4780-10) 

TX PLL/VCO (X58-4790-10) 

PARTS LIST 

Q300,301 2SC4116(GR) TRANSISTOR 


Q350,351 2SK508NV(K52) FET 

Q352,353 2SC4116(Y) TRANSISTOR 



L360,361 L33-1268-15 SMALL FIXED INDUCTOR 



R301-304 RK73GB1J101J CHIP R 100 J 1/16W 

R305 R92-1252-05 CHIP R 0 OHM 




New 


Destiparts 

nation 

parts 


New 


Desti- 

nation 

TX PLL/VCO (X58-4790-10) 




C308-310 CK73FB1E104K CHIP C 0.10UF K 

C311 C92-0001-05 CHIP C 0.1UF 35WV 



















C360,361 CK73FB1C474K CHIP C 0.47UF K 











C374,375 CC73GCH1H010B CHIP C 1.0PF B 








R316 RK73FB2A152J CHIP R 1.5K J 1/10W 

R317,318 R92-1252-05 CHIP R 0 OHM 





R350-353 R92-1252-05 CHIP R 0 OHM 















D350-353 1SV282 VARIABLE CAPACITANCE DIODE 

D354,355 1SV214 VARIABLE CAPACITANCE DIODE 

IC300 SA7025DK MOS IC 

Q300,301 2SC4116(GR) TRANSISTOR 


Q350,351 2SK508NV(K52) FET 

Q352,353 2SC4116(Y) TRANSISTOR 




C379 CC73GCH1H100C CHIP C 10PF C 

C380,381 CC73GCH1HR75B CHIP C 0.75PF B 


TC350,351 ✽ C05-0396-05 CERAMIC TRIMMER CAP (8P) 

CN300 E40-5699-05 PIN ASSY 

CN350 E40-5755-05 PIN ASSY 

CN351 ✽ E40-6098-05 PIN ASSY 

- ✽ F10-2377-04 SHIELDING CASE 


L301,302 L40-3975-34 SMALL FIXED INDUCTOR (39NH) 



L356,357 ✽ L34-4612-05 AIR-CORE COIL 

36

A 


EXPLODED VIEW 


B 

C 

D 

1 

A 

: N09-2292-05 

B ø3 (FW) : N15-1030-46 

C M2.6 x 6 : N30-2606-46 

D M4 x 6 : N30-4006-46 

E M4 x 14 : N30-4014-46 

F M4 x 20 BLK : N30-4020-45 

G M3 x 6 (F) : N32-3006-46 

H M4 x 8 (F) BLK : N32-4008-45 

J M3 x 6 (OC) BLK : N33-3006-45 

L M3 x 14 (Bi) : N35-3014-46 

N M3 x 8 : N67-3008-46 

M M4 x 6 (Bi) BLK : N35-4006-45 

O M2.6 x 6 (Br-Tap) : N87-2606-46 

P M3 x 5 (Br-Tap) BLK : N87-3005-45 

Q M3 x 6 (Br-Tap) BLK : N87-3006-45 

2 

Jx6 

44 

27 

3 

21 

30 

Qx11 

Jx6 

20 

28 26 

Nx3 

Mx14 

701 

Gx2 

702 

15 

42 

Cx2 

Ox4 

38 

Fx4 

4 

2 

Dx3 

700 

Qx10 

TX-RX 

(A/2) 

1 

Final 

(A/2) 

14 

Ox2 

Lx2 

G 

Bx2 

Final 

(B/2) 

34 

36x2 

G 

22 

703 

Ax2 

37 

Cx2 

16 

705 

48 

47 

Ex3 

Ex3 

12 

704 

29 

Gx2 

Dx3 

24 

Qx6 

TX-RX 

(B/2) 

33 

47 

69 

Px4 

23 

Nx2 

IC629 

Hx3 

12 

3 

Qx3 

67 

66 

Display 

(A/2) 

Display 

(B/2) 

Qx5 

46 

Hx3 

48x2 

706 

704 

65 

5 

6 

Parts with the exploded numbers larger than 700 are not supplied. 

38

BACK UP 

PACKING 


E 

53 Protection bag (H25-0029-04) 

59 Foot (J02-0475-05) x 2 

60 Foot (J02-0492-04) x 2 

62 Grommet (J59-0302-05) x 2 

D Binding head machine screw (N30-4006-46) x 2 

K Binding head machine screw (N35-3006-45) x 5 

707 Pamphlet : E 

F 

49 Cushion (G13-1801-04) 

50 Cushion (G13-1802-04) 

54 Protetion bag (H25-0747-04) 

61 Hardware fixture (J21-8402-04) 

708 Warranty card : K,K2 

1 

17 DC cord 

(E30-3427-15) 

55 Protection bag 

(H25-0762-04) 

64 Handle 

(K01-0418-15) 

11 Instruction manual 

(B62-1327-10) 

8 Front glass 

(B10-2635-04) 

10 Filter 

(B11-1259-04) 


(H25-2328-04) 

18 Lead wire with connector 

(E31-3228-05) 

36 Fuse (Blade, 15A/32V) 

(F05-1537-05) 


(H25-0029-04) 

712 

Protection bag 

709 

Carton board 

710 

Packing fixture 

2 

711 


713 


3 

57 Item carton case 

(H52-1621-02) 

Parts with the exploded numbers larger than 700 are not supplied. 

39


ADJUSTMENT 

Test Equipment Required for Alignment 

Test Equipment 

Major Specifications 

1. Standard Signal Generator Frequency Range 136 to 174MHz 

(SSG) Modulation Frequency modulation and external modulation 

Output 

0.1µV to greater than 1mV 

2. Power Meter Input Impedance 50Ω 

Operation Frequency 136 to 174MHz or more 

Measurement Capability Vicinity of 50W 

3. Deviation Meter Frequency Range 136 to 174MHz 

4. Digital Volt Meter Measuring Range 1 to 20V DC 

(DVM) Accuracy High input impedance for minimum circuit loading 

5. Oscilloscope DC through 30MHz 

6. High Sensitivity Frequency Range 10Hz to 600MHz 

Frequency Counter Frequency Stability 0.2ppm or less 

7. Ammeter 13A or more 

8. AF Volt Meter Frequency Range 50Hz to 10kHz 

(AF VTVM) Voltage Range 3mV to 3V 

9. Audio Generator (AG) Frequency Range 50Hz to 5kHz 

Output 

0 to 1V 

10. Distortion Meter Capability 3% or less at 1kHz 

Input Level 

50mV to 10Vrms 

11. Voltmeter Measuring Range 10 to 1.5V DC or less 

Input Impedance 

50kΩ/V or greater 

12. 4Ω Dummy Load Approx. 4Ω, 5W 

The following parts are required for adjustment 

40 

• Test cable for local microphone 

1 8 

1 : NC 

2 : +B 

3 : GND 

4 : PTT/TXD1 (PC serial data from radio) 

5 : MIC GND 

6 : MIC 

7 : HOOK/RXD1 (PC serial data to radio) 

8 : NC 

MIC connector (Front panel view) 

Test Channel (Default) 

No. K,E K2 

RX TX RX TX 

1 146.10 146.00 136.10 136.00 

2 160.10 160.00 143.10 143.00 

3 173.90 174.00 149.90 150.00 

4 150.10 150.00 146.10 146.00 

5 155.10 155.00 155.90 156.00 

6 165.10 165.00 140.10 140.00 

7 170.10 170.00 148.10 148.00 

8 158.50 161.50 147.50 149.00 

9 161.50 158.50 149.00 147.50 

10 136.10 136.00 151.10 151.95 

11 151.90 151.95 152.10 152.00 

12 152.10 152.00 173.90 174.00 

• The following test cables are recommended. 

8pin 

To AG 

AF VTVM 

8pin 

MIC 

(WHT) 

MICG 

Cut 

Plug cord 

Part No. E30-3360-08 

HOOK 

(BRN) 

PTT 

(YEL) 

PTT 

(RED) 

PTT SW 

Test cable for microphone input 

To connect the TX-RX unit A/2 (CN14) to the TX-RX unit 

B/2 (CN602) while in servicing, you can use the 36-pin flat 

cable, E37-0979-05, which is available from the KENWOOD 

parts center. 

Flat cable (36-pin) about 256mm

ADJUSTMENT 


Item 

Condition 

Measurement 

Testequipment 

Unit Terminal 

Adjustment 

Unit Parts Method 

1. Setting & 1) Connect the unit to a suitable DC power supply. 

Firmware 2) Turn the DC source switch on after connecting a PC and FPU cable to the radio. → “P.G.” appears on LED display 

writing 3) Write the firmware to radio. After the end of firmware writing. → Red (TX) LED lights up 

2. Write test 1) Connect the unit to a suitable DC power supply. 

frequency 2) Turn the DC source switch on after connecting a PC and FPU cable to the radio. → “E1” appears on LED display 

3) Write the test frequency to the radio. → Green (BUSY) LED lights up 

4) End of test frequency writing. 

3. Setting 1) Connect the unit to a suitable DC power supply. 

2) Turn the power switch on after connecting a PC and FPU cable to the radio. 

3) Start up the program for the adjustment. 

4. RX PLL lock 1) RX VCO A high DVM TX-RX RX-CV RX VCO TC350 1.50V ± 0.1V 

voltage CH : 11 K,E (A/2) (A3) 

CH : 10 K2 

2) RX VCO A low Check 8V or less 

CH : 10 K,E 

CH : 1 K2 

3) RX VCO B high RX VCO TC351 1.50V ± 0.1V 

CH : 3 K,E (A3) 

CH : 12 K2 

4) RX VCO B low Check 8V or less 

CH : 12 K,E 

CH : 11 K2 

5. TX PLL lock 1) TX VCO A high TX-CV TX VCO TC350 1.50V ± 0.1V 

voltage CH : 11 K,E (A2) 

CH : 10 K2 

2) TX VCO A low Check 8V or less 

CH : 10 K,E 

CH : 1 K2 

3) TX VCO B high TX VCO TC351 1.50V ± 0.1V 

CH : 3 K,E (A2) 

CH : 12 K2 

4) TX VCO B low Check 8V or less 

CH : 12 K,E 

CH : 11 K2 

6. RX 1) Connect the frequency f. counter CN3 PC adj. 50Hz or less 

frequency counter to CN3, then Test CH+44.85MHz 

measure the frequency 

CH : 2 

Note : RX frequency means the local frequency of the RX VCO. So its frequency is wanted frequency plus the IF frequency. 

7. RX 1) High CH (Automatically) f. counter TX-RX CN3 PC adj. 

frequency (A/2) 218.8475MHz 

(tune) 

2) Low CH (Automatically) PC adj. 

180.8525MHz 

8. Setting 1) Remove 8 pin cable and the coaxial cable from CN16, and CN19 on TX-RX side. 

9. TX 1) Connect the frequency f. counter TX-RX CN19 PC adj. 50Hz or less 

frequency counter to CN19, then (A/2) 

measure the frequency 

CH : 2 

Specifications/Remarks 

41


ADJUSTMENT 

Item 

Condition 

Measurement 

Testequipment 

Unit Terminal 

Adjustment 


10. TX 1) High CH (Automatically) f. counter TX-RX CN19 PC adj. 

frequency (A/2) 173.9975MHz 

(tune) 

2) Low CH (Automatically) PC adj. 

136.0025MHz 


11. Setting 1) Insert 8 pin cable and the coaxial cable to CN16, and CN19 on TX-RX side. 

12. Maximum 1) Measure the RF power at Power meter Rear TX ANT Final VR1 Adjust the RF power ± 1W 

power TX ANT. to 53W. 

limitting High CH 

13. TX RF 1) Measure the RF power at PC adj. ± 1W 

high power TX ANT. 50W 

Low CH 

(Shipping power) 

2) Center CH 

3) High CH 

14. TX RF 1) Measure the power level at PC adj. ± 1W 

low power TX ANT. 25W 

Low CH 

(Shipping power) 

2) Center CH 

3) High CH 

15. BPF 1) Connect the TG to RX ANT, Tracking Rear RX ANT TX-RX L2 Center the frequency 

then connect CN1 to the generator (A/2) L3 you are using, then 

spectrum analyzer input. L5 adjust it to look like 

Spectrum analyzer setting Spectrum TX-RX CN1 L6 the wave Fig. 1. 

Span : 50MHz analyzer (A/2) L7 (Page 46) 

Scale : 10dB to 5dB div 

Tracking generator setting 

Output : –30dBm 

16. MCF 1) Connect the TG to CN2, then CN2 L14 Adjust it to look like 

(Wide) connect CN4 to the spectrum CN4 L17 the wave Fig. 2. 

analyzer input. L18 (Page 46) 

CH : 2 (Wide) 

Spectrum analyzer setting 

Span : 50kHz to 25kHz 

Scale : 10dB to 2dB div 

Center freq‘ : 44.850MHz 

Tracking generator setting 

Output : –30dBm 

(Narrow) 2) CH : 2 (Narrow) L15 Adjust it to look like 

L16 the wave Fig. 3. 

L19 (Page 46) 

17. Discrimi- 1) Connect the SSG to RX ANT. SSG Rear RX ANT L24 Adjust the distortion 

nator CH : 2 (Wide) to minimum. 

SSG output : –53dBm/501µV AF VM TEST/SPKR 

SSG MOD : 1kHz Distortion jack SPO 

SSG DEV : 3kHz meter (pin 12) 

AF : 2V/4Ω 

18. Threshold 1) Connect SSG to RX ANT. SSG Rear RX ANT PC adj. 

squelch CH : 2 (Wide) Adjust to point of 

(Wide) SSG output : 3dB below to Audio TEST/SPKR opening squelch 

12dB SINAD level analyzer jack SPO 

SSG MOD : 1kHz VTVM (pin 12) 

SSG DEV : 3kHz 

Oscilloscope 

AF : 2V/4Ω 

2) SSG : OFF Check Squelch must be closed. 

42

ADJUSTMENT 


Item 

Condition 

Measurement 

Testequipment 

Unit Terminal 

Adjustment 


(Narrow) 3) CH : 2 (Narrow) SSG Rear RX ANT PC adj. 

SSG output : 3dB below to 

Adjust to point of 

12dB SINAD level Audio TEST/SPKR opening squelch 

SSG MOD : 1kHz analyzer jack SPO 

SSG DEV : 1.5kHz VTVM (pin 12) 

AF : 2V/4Ω 

Oscilloscope 


4) SSG : OFF Check Squelch must be closed. 

19. Tight 1) Connect SSG to RX ANT. PC adj. 

squelch CH : 2 (Wide) Adjust to point of 

(Wide) SSG output : 7dB over to opening squelch 

12dB SINAD level 

SSG MOD : 1kHz 


AF : 2V/4Ω 

(Narrow) 2) CH : 2 (Narrow) PC adj. 

SSG output : 7dB over to 

Adjust to point of 

12dB SINAD level 

opening squelch 


SSG DEV : 1.5kHz 

AF : 2V/4Ω 

20. RD outut 1) Connect SSG to RX ANT. SSG Rear RX ANT PC adj. ± 5mV 

level CH : 2 (Wide) 80mV 

(Wide) SSG output : –53dBm/501µV DVM CONTROL 


I/O jack 


RD 

(pin 10) 

(Narrow) 2) CH : 2 (Narrow) 4.7kΩ load 

SSG output : –53dBm/501µV 



21. RA outut 1) Connect SSG to RX ANT. SSG Rear RX ANT PC adj. ± 20mV 

level CH : 2 (Wide) 400mV 

(Wide) SSG output : –53dBm/501µV DVM CONTROL 


I/O jack 


RA 

(pin 11) 

(Narrow) 2) CH : 2 (Narrow) 4.7kΩ load 

SSG output : –53dBm/501µV 



22. Maximum 1) Connect AG to the MIC terminal. MOD ANA Rear TX OUT PC adj. ± 0.1kHz 

deviation A-low CH (TX VCO A low) or 4.1kHz 

(Wide) A-center CH (VCO A center) Deviation 

A-high CH (TX VCO A high) meter 

B-low CH (TX VCO B low) Oscilloscope 

B-center CH (VCO B center) 

B-high CH (TX VCO B high) AG Front MIC 

Deviation meter filter AF VTVM 

HPF : OFF 

LPF : 15kHz 

De-emphasis : OFF 

AG : 1kHz/50mV (Terminal load) 

Transmission 

43


ADJUSTMENT 

Item 

Condition 

Measurement 

Testequipment 

Unit Terminal 

Adjustment 


(Narrow) 2) A-low CH (TX VCO A low) MOD ANA Rear TX OUT PC adj. ± 0.1kHz 

A-center CH (VCO A center) or 2.05kHz 

A-high CH (TX VCO A high) Deviation 

B-low CH (TX VCO B low) meter 

B-center CH (VCO B center) Oscilloscope 

B-high CH (TX VCO B high) 

Transmission AG Front MIC 

AF VTVM 


23. DQT 1) Low CH (VCO-A center) MOD ANA Rear TX OUT PC adj. Oscilloscope DC range 

balance High CH (VCO-B center) or Make the de- flat “A” part 

(Wide) Deviation meter filter Deviation modulated waves 

HPF : OFF meter into square waves. 

A 

LPF : 3kHz 

Oscilloscope 


Transmission 

A 

(Narrow) 

2) Low CH (VCO-A center) 

High CH (VCO-B center) 

Transmission 

24. QT 1) VCO-A CH (TX VCO A center) MOD ANA Rear TX ANT PC adj. ± 0.05kHz 

deviation VCO-B CH (TX VCO B center) or 0.75kHz 

(Wide) Deviation meter filter Deviation 

HPF : OFF 

meter 

LPF : 3kHz 

Oscilloscope 


Detector : p-p/2 AG Front MIC 

Transmission 

AF VTVM 

(Narrow) 2) VCO-A CH (TX VCO A center) PC adj. ± 0.05kHz 

VCO-B CH (TX VCO B center) 

0.35kHz 

Transmission 

25. DQT 1) VCO-A CH (TX VCO A center) PC adj. ± 0.05kHz 

deviation VCO-B CH (TX VCO B center) 0.75kHz 

(Wide) Deviation meter filter 

HPF : OFF 

LPF : 3kHz 


Detector : Peak hold 

Transmission 



0.35kHz 

Transmission 

26. CW ID 1) VCO-A CH (TX VCO A center) PC adj. ± 0.1kHz 

deviation VCO-B CH (TX VCO B center) 2kHz 

(Wide) Deviation meter filter 

HPF : OFF 

LPF : 15kHz 


Transmission 



1kHz 

Transmission 

44

ADJUSTMENT 


Item 

Condition 

Measurement 

Testequipment 

Unit Terminal 

Adjustment 


27. Test tone 1) VCO-A CH (TX VCO A center) MOD ANA Rear TX ANT PC adj. ± 0.1kHz 

deviation VCO-B CH (TX VCO B center) or 3kHz 

(Wide) Deviation meter filter Deviation 

HPF : OFF 

meter 

LPF : 15kHz 

Oscilloscope 


Transmission AG Front MIC 

AF VTVM 



1.5kHz 

Transmission 

28. TA (TX 1) Insert AG output into the MOD ANA Rear TX ANT PC adj. ± 0.1kHz 

audio input) control I/O TA terminal (pin 9). or 3.0kHz 

deviation VCO-A CH (TX VCO A center) Deviation 

(Wide) VCO-B CH (TX VCO B center) meter 

Deviation meter filter 

Oscilloscope 

HPF : OFF 

LPF : 15kHz AG CONTROL 

De-emphasis : OFF AF VTVM I/O jack 

AG freq‘ : 1kHz (Sine wave) TA (pin 9) 

AG level : 280mV 

Transmission 



1.5kHz 

Transmission 

29. TD 1) Insert AG output into the MOD ANA Rear TX ANT PC adj. ± 0.1kHz 

deviation control I/O TD terminal (pin 8). or 0.75kHz 

(Wide) VCO-A CH (TX VCO A center) Deviation 

VCO-B CH (TX VCO B center) meter 

Deviation meter filter 

Oscilloscope 

HPF : OFF 

LPF : 3kHz AG CONTROL 

De-emphasis : OFF AF VTVM I/O jack 

AG freq‘ : 100Hz (Sine wave) TD (pin 8) 

AG level : 0.5Vp-p (177mVrms) 

Transmission 



0.35kHz 

Transmission 

30. Repeat 1) VCO-A CH (TX VCO A center) SSG Rear RX ANT PC adj. ± 0.1kHz 

gain level VCO-B CH (TX VCO B center) 1kHz 

(Wide) SSG output : –53dBm MOD ANA TX ANT 


or 


Deviation 

Deviation meter filter meter 

HPF : OFF 

Oscilloscope 

LPF : 15kHz 


Transmission 


(Narrow) 

1) VCO-A CH (TX VCO A center) 


Transmission 

45


ADJUSTMENT 

ATTEN 20dB 

RL 10.0dBm 

10dB/ 

MKR –13.50dBm 

ATTEN 10dB 

RL –32.0dBm 

10dB/ 

MKR –42.17dB 

25.00kHz 

ATTEN 10dB 

RL –32.0dBm 

10dB/ 

MKR –46.000dB 

15.00kHz 

MODULE 

D NOT FOUND 

1.5MHz 1.5MHz 

3dB Max. 

MKR 

25.00kHz 

D 

–42.17dB 

3dB Max. 5.5~7.5kHz 5.5~7.5kHz 

More than 

40dB 

D 

MKR 

15.00kHz 

–46.000dB 

3dB Max. 

More than More than 

3.75kHz 3.75kHz 

More than 

40dB 

15kHz 

15kHz 

G 

G 

G 

CENTER 

RBW 300kHz 

*VBW 300kHz 

SPAN 50.00MHz 

SWP 50ms 

CENTER 44.85000MHz 

RBW 300Hz *VBW 1.0kHz 

SPAN 50.00kHz 

SWP 2.0sec 

CENTER 44.85000MHz 

RBW 300Hz *VBW 1.0kHz 

SPAN 50.00kHz 

SWP 2.0sec 

Fig. 1 Fig. 2 Fig. 3 

Adjustment Points 

CN8 GND 

(BLACK) 

CN6 MAIN DC 

(RED) 

FINAL UNIT (X45-362) (A/2) 

Component side view 

CN7 BACKUP 

(ORANGE) 

Q5 

CN1 

TX IN 

VR1 

CN2 

RX 

CN5 

CN3 

CN16 

1 

8 

CN19 

CN18 

L2 L3 

L5 L6 L7 

TP102 

TX CV 

TC350 (VCO A) 

A2 : TX VCO (X58-479) 

3 

1 

CN15 

L24 

1 2 

CN4 

L19 

L16 

NARROW 

WIDE 

L15 

1 2 

CN2 

CN1 

TC351 (VCO B) 

L18 L17 L14 

CN3 

TC350 (VCO A) 

TX-RX UNIT (X57-626) (A/2) 


TP101 

RX CV 

A3 : RX VCO (X58-478) 

TC351 (VCO B) 

46

TERMINAL FUNCTION 


Final Unit (X45-3620-XX) 

Connector Terminal Terminal I/O Terminal function 

No. No. Name 

CN1 DRV I TX driver input signal (Coaxial) 

CN2 – – Reserved 

CN3 1 VTH O High temperature detector signal 

output 

To X57 2 BAT O Main DC/BACKUP status output 

(A/2) 3 PDT O RF power down signal output 

TX-RX 4 FAS I Fan control signal input 

unit 5 PC I TX power control signal input 

6 8T I 8V input during transmission 

7 RSW – Reserved 

8 E – Ground 

CN4 B O Power supply output for cooling fan 

FAG O Fan ground 

CN5 1 E – Ground 

2 +B O Power supply output 

3 +B O Power supply output 

CN6 1 Main DC I Power supply input (from Main DC 

terminal) 

CN7 1 BACKUP I Power supply input (from BACKUP 

terminal) 

CN8 1 GND – Ground 

Display Unit (X54-3330-20) (A/2) 


No. No. Name 

CN501 1 HOOK I Hook detection input/RXD input 

2 MIC I MIC signal input 

To X54 3 MIG – MIC ground 

(B/2) 4 PTT I/O PTT input/TXD output 

display 5 GND – Ground 

unit 6 NC – No connection 

7 SB O Power supply output after power 

switch 

8 NC – No connection 

9 GND – Ground 

10 5M O Common 5V output 

11 VLI I Volume control input for AF signal 

CN502 1 MIG – MIC ground 

2 MIC O MIC signal output 

To X57 3 VLI O Volume control output for AF signal 

(B/2) 4 5C I Common 5V input 

TX-RX 5 K4 I KEY input 4 

unit 6 K5 I KEY input 5 

control 7 K2 O KEY output 2 

section 8 K3 O KEY output 3 

9 K1 O KEY output 1 

10 HOOK/RXD O Hook detection output/RXD output 

11 SOE I Output enable for shift register 

12 PTT/TXD I/O PTT output/TXD input 


No. No. Name 

13 STB1 I Strobe data for shift register 

14 CLK I Clock data input 

15 DAT I Serial data input 

16 PSW O Power switch output 



19 SB I Power supply input after power switch 


Display Unit (X54-3330-20) (B/2) 


No. No. Name 

CN601 1 VLI O Volume control output for AF signal 

2 5M I Common 5V input 

To X54 3 GND – Ground 

(A/2) 4 NC – No connection 

display 5 SB I Power supply input after power switch 

unit 6 NC – No connection 


8 PTT I/O PTT output/TXD input 

9 MIG – MIC ground 

10 MIC O MIC signal output 

11 HOOK O Hook detection output/RXD output 

J601 1 NC – No connection 

(Mic jack) 2 SB O Power supply output after power 

switch 

3 E – Ground 

4 PTT/TXD I/O PTT input/TXD output 

5 ME – MIC ground 


7 HOOK/RXD I Hook detection input/RXD input 


TX-RX Unit (X57-6260-XX) (A/2) : TX-RX Section 


No. No. Name 

CN1 – – O Use for RX helical BPF tuning (Coaxial) 

CN2 – – I Use for RX MCF tuning 

CN3 – – O Use for RX frequency adjustment 

(Coaxial) 

CN4 – – O Use for RX MCF tuning 

CN14 1 NC – No connection 

2 DET O Detection signal output 

To X57 3 NC – No connection 

(B/2) 4 GND – Ground 

control 5 ASQ O Squelch signal output 

section 6 RSSI O RSSI signal output 

of TX-RX 7 NC – No connection 

unit 8 DP I Data input for PLL 

9 CP I Clock input for PLL 

47




No. No. Name 

10 EPR I Enable input for RX PLL 

11 EPT I Enable input for TX PLL 

12 LDR O Lock detector for RX PLL 

13 LDT O Lock detector for TX PLL 

14 DT I Data input 

15 CK I Clock input 

16 STB4 I Strobe input for shift register 

17 FWD O RF power down signal output 

18 LD2 I Latch data input for DA converter 

19 BUP O Backup signal output 

20 PSW I Power switch input 

21 TEMP O High temperature detector signal 

output 

22 SOE I Output enable for shift register 


24 MB I Modulation signal input for VCXO 

25 MO I Modulation signal input for VCO 






switch 


switch 


switch 


switch 


35 8C O Common 8V output 


CN15 1 E – Earth 

2 B I Power supply input 

3 B I Power supply input 

CN16 1 E – Earth 

2 RSW – Reserved 

To X45 3 8T O 8V output during transmission 

final 4 PC O TX power control signal output 

unit 5 FAS O Fan control signal output 

6 PDT I RF power down signal input 

7 BAT I Main DC/BACKUP status input 

8 VTH I High temperature detector signal 

input 

CN18 1 RX IN I Receive signal input (Coaxial) 

CN19 1 DO O Transmission signal output (Coaxial) 

TX-RX Unit (X57-6260-XX) (B/2) : Control Section 


No. No. Name 

CN600 1 SB O Power supply output after power 

switch 

To X54 2 SB O Power supply output after power 

(B/2) 

switch 

display 3 GND – Ground 

unit 4 NC – No Connection 

5 DAT O Serial data output 

6 PSW I Power switch input 

7 STB1 O Strobe data for shift register 

8 CLK O Clock data output 

9 SOE O Output enable for shift register 

10 TXD1 I/O PTT input/TXD output 

11 K1 I KEY input 1 

12 RXD1 I Hook detection input/RXD input 





17 VLI I Volume control input for AF signal. 


19 MIG – Mic ground 


CN601 1 TXI I MIC signal input 

2 TXO O MIC signal output 

To 3 RXI I RX audio signal input 

optional 4 AC O Audio control signal output 

board 5 BC1 O Scramble code output. 

6 BC2 O Scramble code output. 



9 PTI I PTT signal input 

10 CLRC O Clear code for scramble 

11 RXO O RX audio signal output 

12 PTO O PTT signal output 



CN602 1 8C I Common 8V input 

2 8C I Common 8V input 

To X57 3 NC – No connection 

(A/2) 4 SB I Power supply input after power switch 

TX-RX 5 SB I Power supply input after power switch 

unit 6 SB I Power supply input after power switch 






12 MO O Modulation signal output for VCO 

13 MB O Modulation signal output for VCXO 

48




No. No. Name 


15 SOE O Output enable for shift register 

16 TEMP I High temperature detector signal input 

17 PSW O Power switch output 

18 BUP I Backup signal input 

19 LD2 O Latch data output for DA converter 

20 FWD I RF power down signal input 

21 STB4 O Strobe output for shift register 

22 CK O Clock output 

23 DT O Data output 

24 LDT I Lock detector for TX PLL 

25 LDR I Lock detector for RX PLL 

26 EPT O Enable output for TX PLL 

27 EPR O Enable output for RX PLL 

28 CP O Clock output for PLL 

29 DP O Data output for PLL 


31 RSSI I RSSI signal input 

32 ASQ I Squelch signal input 



35 DET I Detection signal input 


CN603 1 SB O Power supply output after power 

switch 

To ACC 2 SB O Power supply output after power 

15 pin switch 

connector 3 GND – Ground 


CN604 1 AO5 O Auxiliary output 5 (FPU selectable) 

2 AO4 O Auxiliary output 4 (FPU selectable) 

To ACC 3 AO3 O Auxiliary output 3 (FPU selectable) 

15 pin 4 SPO O External speaker output 

connector 5 SPO O External speaker output 



8 SPI I Internal speaker input 

9 RSSI O RSSI signal output 

10 RD O RX data output 

11 SPG – External speaker ground 

12 SPG – External speaker ground 

CN605 1 SP O Internal speaker AF output 

2 SPG – Internal speaker ground 

CN606 1 NC – No connection 


To ACC 3 SPM I Speaker mute signal input 

25 pin 4 IO6 I/O Programable I/O 6 

D-sub 5 RXG – RX signal ground 

connector 6 IO5 I/O Programable I/O 5 

7 RA O RX audio output (voice) 

8 IO4 I/O Programable I/O 4 


No. No. Name 

9 RD O RX data output (voice & data) 


11 TA I TX audio input (voice) 


13 TD I TX data input (data or signaling) 


15 DG – Control line ground 

16 TXG – TX signal ground 

17 AI3 I Auxiliary input 3 (FPU selectable) 



20 SC O Squelch control output 


22 EPTT I External press-to-talk switch input 

23 TXD2 O RS-232C output signal (for FPU) 

24 EMON I External monitor switch input 

25 RXD2 I RS-232C input signal (for FPU) 






VCO (RX) Unit (X58-4780-10) 


No. No. Name 

CN300 1 FIN I Prescaler RF signal input 


3 LDR O Lock detector for RX PLL 

4 EPR I Enable input for RX PLL 

5 DP I Data input for PLL 


7 REF I Reference frequency signal input 


2 SRR I Switching signal input for RX VCO 

3 8CL I 8V input through the ripple filter 

4 CV I RX PLL lock voltage 



CN351 1 VO O RX VCO output 


VCO (TX) Unit (X58-4790-10) 


No. No. Name 

CN300 1 FIN I Prescaler RF signal input 


3 LDT O Lock detector for TX PLL 

4 EPT I Enable input for TX PLL 

5 DP I Data input for PLL 

49




No. No. Name 


7 REF I Reference frequency signal input 


2 STT I Switching signal input for TX VCO 


4 CV I RX PLL lock voltage 


6 MO I Modulation signal input 

CN351 1 VO O TX VCO output 


ACC 25 pin D-sub Connector 


No. No. Name 


2 RXD2 I Serial data to radio 

3 TXD2 O Serial data from radio 

4 AI1 I Programmable function input 1 



7 DG – Control line ground 

8 TD I TX data input (data or signalling) 

Input impedance: 600Ω 

Coupling: AC coupling 

Deviation: 0.75kHz (wide)/ 

0.35kHz (Narrow) 

(100Hz 0.5Vp-p input) 

9 TA I TX audio input (voice) 

Input impedance: 600Ω 


Deviation: 60% deviation 

(1kHz 280mVrms ± 25mV input) 

10 RD O RX data output (voice & data) 

Output impedance: 1kΩ or less 


Frequency response: ± 2.5dB at 

10~3000Hz 

Output level: 70~90mVrms 

(standard modulation) 

11 RA O RX audio output (voice) 

Output impedance: 1kΩ or less 


Output level: 360~440mVrms 

(standard modulation) 

12 RXG – RX signal ground 

(for RA,RD ground only) 

13 SPM I Speaker mute signal input 

“L”: Mute on 

14 NC - No connection 


No. No. Name 

15 EMON I External monitor switch input 

“L”: Monitor on, “H”: Monitor off 

16 EPTT I External press-to-talk switch input 

“L”: PTT on, “H”: PTT off 

17 SC O Squelch control output 

“L”: Busy, “H”: Not busy 

18 NC - No connection 

19 TXG - TX signal ground 

(for TA,TD ground only) 

20 AIO1 I/O Programmable function input/output 1 






ACC 15 pin Connector 

13 12 11 10 9 8 7 6 5 4 3 2 1 

25 24 23 22 21 20 19 18 17 16 15 14 


No. No. Name 


switch; 1A maximum 


switch; 1A maximum 




6 SPG – Speaker ground 

7 RD O RX data output 

8 RSSI O RSSI output 

9 SPI I Internal speaker input 

10 AO1 O Auxiliary output 1 


12 SPO O External speaker output 




13 10 7 4 1 

14 11 8 5 2 

15 12 9 6 3 

50


WIRING 


51 52

J 

H 

F 

D 

B 

I 

G 

E 

C 

A 

1 

3 

5 

7 

2 

4 

6 

54 

PC BOARD VIEWS TKR-750 

RX PLL/VCO (X58-4780-10) 


RX PLL/VCO (X58-4780-10) 

Foil side view 

TX PLL/VCO (X58-4790-10) 


TX PLL/VCO (X58-4790-10) 

Foil side view 


Foil side 


Foil side 

R364 

C376 

Q354 

CN351 

VO 

GND 

1 

2 

CN350 

CN300 

GND 

SRR 

8CL 

CV 

9CL 

NC 

1 

6 

FIN C325 

C306 

R319 

R311 

C310 

C309 

C315 

R308 

R310 

R313 

R320 

L300 

R300 

5C 

LDR 

EPR 

DT 

CP 

REF 

1 

7 

C307 

C308 

R306 

R312 

R309 

C311 

+ 

C324 

+ 

C318 

+ 

C320 

+ 

R364 

C376 

Q354 

CN351 

VO 

GND 

1 

2 

CN350 

CN300 

GND 

SRR 

8CL 

CV 

9CL 

NC 

1 

6 

FIN C325 

C306 

R319 

R311 

C310 

C309 

C315 

R308 

R310 

R313 

R320 

L300 

R300 

5C 

LDR 

EPR 

DT 

CP 

REF 

1 

7 

C307 

C308 

R306 

R312 

R309 

C311 + 

C324 + 

C318 + 

C320 + 

J72-0749-02 A/2 

J72-0749-02 B/2 

J72-0749-02 A/2 

J72-0749-02 B/2 

R364 

R375 

R373 

R370 

R374 

R371 C381 C380 

C376 

R372 

Q354 

CN351 

VO 

GND 

1 

2 

CN350 

CN300 

GND 

STT 

8CL 

CV 

9CL 

MO 

1 

6 

FIN C325 

C306 

R319 

R311 

C310 

C309 

C315 

R308 

R310 

R313 

R320 

L300 

R300 

5C 

LDT 

EPT 

DT 

CP 

REF 

1 

7 

C307 

C308 

R306 

R312 

R309 

C311 

+ 

C324 

+ 

C318 

+ 

C320 

+ 

J72-0750-02 A/2 

J72-0750-02 B/2 

D355 

D354 

R364 

R375 

R373 

R370 

R374 

R371 

C381 

C380 

C376 

R372 

Q354 

CN351 

VO 

GND 

1 

2 

CN350 

CN300 

GND 

STT 

8CL 

CV 

9CL 

MO 

1 

6 

FIN C325 

C306 

R319 

R311 

C310 

C309 

C315 

R308 

R310 

R313 

R320 

L300 

R300 

5C 

LDT 

EPT 

DT 

CP 

REF 

1 

7 

C307 

C308 

R306 

R312 

R309 

C311 + 

C324 + 

C318 + 

C320 + 

J72-0750-02 A/2 

J72-0750-02 B/2 

D355 

D354 

C379 

C374 

C364 

C370 

C366 

C377 

C373 

C378 

C375 

C365 

C367 

C371 

R368 

R361 

R363 

R357 

R360 

R359 

R354 

R355 

R358 

R356 

R366 

R365 

R362 

Q352 

Q350 

Q351 

Q353 

Q355 

C372 

C369 

L356 

L352 

L353 

R321 

R301 

R305 

R304 

R303 

R302 

C321 

C316 C313 

C327 

Q301 

Q300 

+ 

L302 

IC300 

1 

10 11 

20 

L301 

Q302 

L351 

L350 

C362 

C383 

C356 

C355 

C363 

L357 

C368 

R367 

L362 

L358 

L359 

L360 

L361 

G 

S 

D 

G 

S 

D 

TC350 

TC351 

C359 

C358 

C361 

C357 

C354 

C360 

L354 

L355 

D350 

D351 

D352 

D353 

R351 

R353 

R352 

R350 

R315 

R322 

C322 

C305 

C304 

C317 

C314 

C312 

R318 

R314 

C319 

L303 

R317 

R316 

C323 

C379 

C374 

C364 

C370 

C366 

C377 

C373 

C378 

C375 

C365 

C367 

C371 

R368 

R361 

R363 

R357 

R360 

R359 

R354 

R355 

R358 

R356 

R366 

R365 

R362 

Q352 

Q350 

Q351 

Q353 

Q355 

C372 

C369 

L356 

L352 

L353 

R321 

R301 

R305 

R304 

R303 

R302 

C321 

C316 C313 

C327 

Q301 

Q300 

+ 

L302 

IC300 

1 

10 11 

20 

L301 

Q302 

L351 

L350 

C362 

C383 

C356 

C355 

C363 

L357 

C368 

R367 

L362 

L358 

L359 

L360 

L361 

G 

S 

D 

G 

S 

D 

TC350 

TC351 

C359 

C358 

C361 

C357 

C354 

C360 

L354 

L355 

D350 

D351 

D352 

D353 

R351 

R353 

R352 

R350 

R315 

R322 

C322 

C305 

C304 

C317 

C314 

C312 

R318 

R314 

C319 

L303 

R317 

R316 

C323 

C379 

C374 

C364 

C370 

C366 

C377 

C373 

C378 

C375 

C365 

C367 

C371 

R368 

R361 

R363 

R357 

R360 

R359 

R354 

R355 

R358 

R356 

R366 

R365 

R362 

Q352 

Q350 

Q351 

Q353 

Q355 

C372 

C369 

L356 

L352 

L353 

R321 

R301 

R305 

R304 

R303 

R302 

C321 

C316 C313 

Q301 

Q300 

L302 

IC300 

1 

10 11 

20 

L301 

Q302 

L351 

L350 

C362 

C383 

C382 

C356 

C355 

C363 

L357 

C368 

R367 

L362 

L360 

L361 

G 

S 

D 

G 

S 

D 

TC350 

TC351 

C361 

C357 

C354 

C360 

L354 

L355 

D350 

D351 

D352 

D353 

R351 

R353 R352 R350 

R315 

R322 

C322 

C305 

C304 

C317 

C314 

C312 

R318 

R314 

C319 

L303 

R317 

R316 

C323 

C379 

C374 

C364 

C370 

C366 

C377 

C373 

C378 

C375 

C365 

C367 

C371 

R368 

R361 

R363 

R357 

R360 

R359 

R354 

R355 

R358 

R356 

R366 

R365 

R362 

Q352 

Q350 

Q351 

Q353 

Q355 

C372 

C369 

L356 

L352 

L353 

R321 

R301 

R305 

R304 

R303 

R302 

C321 

C316 C313 

Q301 

Q300 

L302 

IC300 

1 

10 11 

20 

L301 

Q302 

L351 

L350 

C362 

C383 

C382 

C356 

C355 

C363 

L357 

C368 

R367 

L362 

L360 

L361 

G 

S 

D 

G 

S 

D 

TC350 

TC351 

C361 

C357 

C354 

C360 

L354 

L355 

D350 

D351 

D352 

D353 

R351 

R353 

R352 

R350 

R315 

R322 

C322 

C305 

C304 

C317 

C314 

C312 

R318 

R314 

C319 

L303 

R317 

R316 

C323

I 

1 

A B C D E F G H I 

J 

TKR-750 PC BOARD VIEWS 

DISPLAY UNIT (X54-3330-20) Component side view 

J72-0756-02 B/2 J72-0756-02 A/2 

2 

1 

CN601 

11 

VLI 

5M 

GND 

NC 

SB 

NC 

GND 

PTT 

MIG 

MIC 

HK 

VR601 

C603 

C606 

C602 

D506 

D507 

D602 

D603 

Q519 

1 

3 

6 

4 

CP502 

6 

3 4 

1 

Q518 

Q524 

1 

3 

6 

4 

CP504 

Q523 

4 

6 

3 

1 

S507 

3 

D601 

R605 

R601 

Q516 

1 

3 

6 

4 

CP501 

6 

3 4 

1 

Q517 

Q522 

1 

3 

6 

4 

CP503 

6 

3 4 

1 

Q521 

MAIN DC 

GRN 

D505 

BACKUP 

RED 

4 

5 

NC 

HOOK 

MIC 

MIG 

PTT 

GND 

SB 

NC 

C607 

Q512 

1 6 

3 4 

R604 

C605 

J601 

R521 

S501 

C513 

8 9 

IC503 

C512 

16 

1 

R522 

S502 

R532 

C514 

R531 

R530 

6 1 

4 3 

Q513 

R523 

C515 

1 2 

MIC 

5C 

K5 

K3 

HK/RXD 

PTT/TXD 

CLK 

PSW 

NC 

SB 

CN502 

MIG 

VLI 

K4 

K2 

K1 

SOE 

STB1 

DAT 

GND 

SB 

S503 R529 

R533 

19 20 

R514 

R512 

R513 

+ 

C510 

GRN 

C509 

S504 

D503 

R524 

C508 

R511 

8 

TX 

IC501 

5 

1 

4 

1 

IC504 

16 

8 9 

RED 

R516 

R510 

R509 

Q508 

C516 

C505 

C506 

C504 

+ 

C521 

C519 

C522 

D502 

D501 

C507 

C502 

+ 

O 

G 

IC506 I 

R525 

R508 

1 

C523 

C503 + 

R507 

Q501 

IC505 

16 

8 9 

R506 

S505 

Q502 

R505 

VR501 

GRN 

C517 

+ 

C501 

Q506 

D504 

BUSY 

R517 

C520 

3 4 

1 6 

Q504 

RED 

11 

VLI 

5M 

GND 

NC 

SB 

NC 

GND 

PTT 

MIG 

MIC 

HK 

1 

CN501 

R541 

R502 

R503 

R542 

R606 

IC507 

D G S 

Q525 

G 

O 

C526 

D512 

C518 

S506 

R526 

C525 

C524 

+ 

D508 

R538 

R537 

R534 

D509 

C511 

1 

16 

IC502 

D511 

R540 

Q514 

1 6 

3 4 

8 

9 

D510 

R539 

D514 

R536 

D513 

R535 

R520 

R544 

Q511 

R543 

6 1 

4 3 

Q507 

Q510 


R519 

Foil side 

6 

DTA144EUA 

DTC363EK 

DTD114EK 

DTD123EK 

2SA1586 

2SC3120 

2SC3356 

2SC4116 

2SC4215 

2SC4617 

2SB1132 

2SC3357 

DTA114EUA 

DTC114EUA 

DTC144EUA 

LA4422 

NJM2904E 

NJM4558E 

DAN235K TA78L05F DA204U 

HSM88AS 

1SS226 

VREF 

GND 

VIN 

MA742 2SK508NV UPA672T 2SJ506 2SK1824 BU4094BCF TC7S00F 

TC7S04FU 

TC7S66FU 

AN8009M 

TK11050M 

7 

55

I 

A 

B 

C 

D 

E 

F 

G 

H 

I 


J 

1 

DISPLAY UNIT (X54-3330-20) Foil side view 

J72-0756-02 A/2 

J72-0756-02 B/2 

VR601 

11 

CN601 

1 

HK 

MIC 

MIG 

PTT 

GND 

NC 

SB 

NC 

GND 

5M 

VLI 

2 

D507 

D506 

C602 

C606 

C603 

S507 

Q523 

6 

4 

1 

3 

CP504 

Q524 

3 

1 

4 

6 

Q518 

6 

1 

3 4 

CP502 

Q519 

3 

1 

4 

6 

D603 

D602 

BACKUP 

RED 

D505 

MAIN DC 

GRN 

Q521 

6 

1 

3 4 

CP503 

Q522 

3 

1 

4 

6 

Q517 

6 

1 

3 4 

CP501 

Q516 

3 

1 

4 

6 

R601 

R605 

D601 

3 

R519 

Q510 

Q511 

R543 

1 6 

3 4 

Q507 

R544 

R520 


D513 

R535 

D514 

R536 

D510 

R539 

D511 

8 

9 

R540 

IC502 

Q514 

6 1 

4 3 

1 

16 

R538 

R537 

R534 

D509 

C511 

D508 

D512 

C524 

+ 

C525 

Q525 

S 

D G 

O 

G 

C518 

S506 

R526 

C526 

R606 

IC507 

R542 

R541 

R502 

R503 

CN501 

C520 

4 3 

6 1 

Q504 

11 

1 

RED 

VLI 

5M 

GND 

NC 

SB 

NC 

GND 

PTT 

MIG 

MIC 

HK 

R517 

Q506 

D504 

BUSY 

+ 

C501 

GRN 

C517 

16 

9 

IC505 

S505 

R505 

Q502 

VR501 

1 

8 

C523 

+ C503 

R506 

IC506 I 

G 

O 

R507 

Q501 

R525 

R508 

C502 

C519 

C522 

D502 

+ 

+ 

C521 

Q508 

C516 

C505 

C504 

C506 

16 

9 

IC504 

R516 

R510 

R509 

D501 

C507 

1 

8 

RED 

1 

D503 

TX 

R524 

C508 S504 

R511 R512 R529 S503 

8 

IC501 

4 5 

GRN 

C509 

R513 

+ 

C510 

R514 

19 20 

SB SB 

GND NC 

DAT PSW 

STB1 CLK 

SOE PTT/TXD 

K1 HK/RXD 

K2 K3 

K4 K5 

VLI 5C 

MIG MIC 

R533 

1 2 

CN502 

R523 

C515 

R530 

R531 

1 6 

3 4 

Q513 

C514 

R532 

S502 

R522 

C512 

16 

1 

IC503 

8 9 

C513 

C605 

J601 

R521 

S501 

R604 

NC 

HOOK 

MIC 

MIG 

PTT 

GND 

SB 

NC 

C607 

Q512 

6 1 

4 3 

4 

5 

Foil side 

30622M4-113GP AT29C020-90TI AT2408N10SI2.5 BU4053BCF SA7025DK NJM78L05UA 

RH5VL42C 

AK4550VT 

BU4094BCFV 

M62354GP 

TC74VHC4040FT 

M62364FP 

TC74LVX4245FS 

6 

320VC5402PGE 

TA75W01FU 

TC75W51FU 

TA75S01F NJM7808FA TA7808F ADM202EARN TK14489V 2SK3075 

7 

58

1 

A B C D E F G H I J K L M N O P Q R S 


2 

FINAL UNIT (X45-3620-XX) -10 : K,E -11 : K2 Component side view 

3 

CN8 GND 

(BLACK) 

CN6 MAIN DC 

(RED) 

C91 

C57 

+ 

C113 

J72-0754-12 A/2 

ANT 

+ 

D7 

L12 

4 

J72-0754-12 B/2 

CN7 BACKUP 

(ORANGE) 

K1 

F1 

C55 

C46 

C47 

L8 

L11 

C77 

C118 

C37 

S 

C151 

S 

L7 

C51 

C50 

C74 

5 

6 

7 

CN51 

D51 

CN52 

CHARGE 

R61 

L4 

C19 

C22 

C21 

L5 

R19 R18 

C27 

R17 

R68 

C141 

S 

G Q4 D 

S 

C29 

C112 

L6 

C30 

C31 

VTH 

R22 

R23 

C32 

R24 

C139 C138 

G 

S 

Q5 

C152 

D 

S 

C116 

C49 

R40 

C142 

C54 

C48 

R37 

C140 

R62 

D4 

L10 

C69 

R43 

C92 

L9 

C72 

C71 

8 

9 

10 

D52 

C3 

+ 

CN4 

FAG 2 

FAB 1 

C106 

B 

B 

E 

CN5 

3 

1 

R15 

C96 

R50 

L3 

C16 

R1 

C2 

Q3 

E 

C 

B 

C97 

C15 

C137 

R13 

R49 

C12 

R11 

R8 

R53 

L13 

C11 C1 C17 

R64 

R10 

C10 

C14 

R9 

L2 

C9 

C99 

+ 

C136 

R48 

Q2 

C13 

R7 

C7 

R52 

R6 

C94 

R66 

L17 

R65 

L16 

R20 

C28 

CN1 

TX IN 

R21 

C33 

D2 

R26 

R28 

C42 

R30 

R29 

R27 

R32 

5 4 

IC11 

8 

R31 

8T 

PC 

R35 

R34 

R41 

R57 

VR1 

DET 

TH1 

R25 

8 

GND 

RSW 

8T 

PC 

FAS 

PDT 

BAT 

VTH 

CN3 

1 

R36 

C64 

R38 

L15 

D5 

C68 

R45 

R63 

CN2 

RX 

11 

Ref No. Address 

IC1 8K 

Q2 10H 

Q3 10G 

Q4 6I 


Q5 5M 

D2 8J 

D4 7Q 

D5 10R 


D7 3K 

D51 7B 

D52 8B 

Pattern 1 

Pattern 2 

Pattern 3 

Pattern 4 


Foil side 

12 

13 

14 

59 60

A 

B 

C 

D 

E 

F 

G 

H 

I 

J 

K 

L 

M 

N 

O 

P 


Q 

R 

S 

1 

FINAL UNIT (X45-3620-XX) -10 : K,E -11 : K2 Foil side view 

2 

J72-0754-12 A/2 

3 

GND 

BLK 

4 

C87 

+B2 

RED 

GND 

BLK 

+B1 

RED 

5 

D8 

C90 

J72-0754-12 B/2 

R55 

6 

R60 

R59 

D9 

4 3 

IC2 

6 1 

7 

D3 

C59 

R58 

Q9 

C60 

C62 

Q7 

G 

S D 

R56 

8 

C43 

C35 

Q8 

C39 

C44 

D1 

C107 

D6 

C86 

C85 

C84 

C83 

C82 

C81 

C80 

C98 

IC3 

I 

G 

O 

C108 

C109 

+ C110 

+B2 

ORG 

GND 

BLK 

+B1 

RED 

9 

10 


IC2 7J 

IC3 9O 

Q7 8E 

Q8 9I 


Q9 8O 

D1 9K 

D3 7B 

D6 9O 


D8 6O 

D9 7O 

Pattern 1 

Pattern 2 

Pattern 3 

Pattern 4 


Foil side 

11 

12 

13 

61 62 

14

1 



2 

FINAL UNIT (X45-3620-XX) -10 : K,E -11 : K2 Component side view + Foil side 

3 

CN8 GND 

(BLACK) 

CN6 MAIN DC 

(RED) 

C91 

C57 

+ 

C113 

J72-0754-12 A/2 

ANT 

+ 

D7 

L12 

4 

5 

6 

7 

8 

9 

10 

J72-0754-12 B/2 

+B1 

RED 

+B1 

RED 

CN51 

GND 

BLK 

D51 

D52 

GND 

BLK 

GND 

BLK 

CN52 

+B2 

RED 

+B2 

ORG 

CN7 BACKUP 

(ORANGE) 

C3 

CHARGE 

R61 

+ 

D9 

D6 

R56 

C109 

Q9 

C107 

C108 

C110 + 

D8 

FAG 

FAB 

IC3 

I 

G 

O 

3 

CN4 

B 

C87 

2 

1 

C106 

B 

CN5 

R55 

E 

1 

R15 

C96 

K1 

R50 

L3 

L4 

C19 

C16 

R1 

C2 

Q3 

E 

C 

B 

C97 

C15 

C137 

R13 

C90 

R49 

C12 

R11 

C22 

C21 

R8 

R53 

L13 

C11 C1 C17 

R64 

R10 

L5 

C10 

C14 

R9 

L2 

C9 

R19 R18 

C99 

C27 

R17 

+ 

C136 

R48 

Q2 

R68 

C13 

R7 

C7 

C98 

R52 

G Q4 D 

D1 

R6 

C94 

C141 

S 

S 

R66 

L17 

R65 

L16 

C118 

C37 

R20 

C28 

C29 

C112 

CN1 

TX IN 

L6 

R21 

F1 

C33 

D2 

C30 

C31 

R60 

R59 

R26 

3 4 

IC2 

1 6 

R58 

R28 

VTH 

PC 

R32 

R30 

R29 

C42 

C44 

R27 

R22 

C139 C138 

R23 

5 4 C43 

R35 

IC11 

8 Q8 R41 

C39 

R31 

8T 

S 

C32 

R24 

R34 

R57 

S 

G 

VR1 

DET 

Q5 

TH1 

C55 

C46 

C151 

C152 

S 

D 

S 

C80 

C81 

L7 

R25 

C35 

C82 

8 

GND 

RSW 

8T 

PC 

FAS 

PDT 

BAT 

VTH 

CN3 

C83 

C84 

C116 

C85 

C47 

C86 

1 

Q7 

S D 

G 

R40 

C142 

C51 

C49 

L8 

C54 

C50 

C48 

R37 

C140 

C68 

R36 

R45 

R62 

D4 

C64 

C59 

R38 

D5 

C74 

D3 

L15 

R63 

C62 

L10 

R43 

L11 

C69 

L9 

C92 

C77 

C72 

C71 

C60 

CN2 

RX 

11 

12 


IC1 8K 

IC2 7J 

IC3 9E 

Q2 10H 

Q3 10G 

Q4 6I 

Q5 5M 


Q7 8O 

Q8 8K 

Q9 8E 

D1 9I 

D2 8J 

D3 7R 

D4 7Q 


D5 10R 

D6 9E 

D7 3K 

D8 6E 

D9 7E 

D51 7B 

D52 8B 

Pattern 1 

Pattern 2 

Pattern 3 

Pattern 4 


Foil side 

Connect 1 and 4 

13 

14 

63 64

I 

G 

O 

A 

B 

C 

D 

E 

F 

G 

H 

I 

J 

K 

L 

M 

N 

O 

P 

Q 

PC BOARD VIEW TKR-750 

R 

S 

1 

TX-RX UNIT (X57-6260-XX) (A/2) -10 : K,E -11 : K2 Component side view 

J72-0757-01 A/2 

1 

CN16 

8 

CN19 

2 

GND 

RSW 

8T 

PC 

FAS 

PDT 

BUP 

VTM 

3 

L2 

L3 

L5 

L6 

L7 

C125 

GND2 

VO 

CN18 

A4 

A5 

A6 

A7 

A8 

CN1 

+ 

8CLT 

TP102 

TX CV 

C137 

+ 

GND1 

STT 

8CL 

CV 

9CL 

MO 

A2 : TX VCO (X58-479) 

FIN 

5C 

LDT 

EPT 

DP 

4 

5 

CP 

PSW 

B 

3 

B 

CN15 

B 

1 

CF1 

WIDE 

L20 

R50 

CF2 

NARROW 

C53 

C58 

C59 

C64 

X1 

1 

IC9 

10 11 

R62 

R63 

L24 

CN4 

C60 

R54 

20 

R65 

C196 

C74 

2 

1 

C210 

R61 

C67 

R46 

C66 D2 

R60 

R59 

R57 

C211 

C51 

C48 

R44 

R45 

L19 

L18 

L16 

L17 

XF1 

XF2 

NARROW 

WIDE 

A9 

L15 

L14 

CN2 

R41 

C37 

D1 

2 

1 

A10 

C212 

C213 

L41 

R31 

R32 

R30 

A1 

R110 

R112 

R111 

C139 

+ 

FC 

DP 

CP 

EP 

LD 

GND2 

VO 

REF 

6 

7 

8 

IC4 

O 

G 

I 

K1 

SB 

8CR 

R69 

+ 

C76 

CN4 

1 2 

Q4 

R142 

DET 

GND 

RSSI 

DP 

EPR 

LDR 

DT 

STB4 

LD2 

PSW 

SOE 

MB 

GND 

NC 

SB 

SB 

NC 

8C 

NC 

NC 

ASQ 

NC 

CP 

EPT 

LDT 

CK 

FWD 

BUP 

TEMP 

GND 

MO 

GND 

NC 

SB 

SB 

8C 

R141 

R140 

R139 

R138 

R137 

SRR STT 

36 

35 

TX 

MO 

CK 

F1 

SOE 5CR 

DT 

C161 

C173 

STB4 

C160 

C172 

LD2 

I 

FCR 

FCT 

G 

IC10 

IC5 

O 

+ 

C158 

C174 

+ 

9V 

C159 

Q17 

C171 

R128 

Q16 

B 

C 

E 

R129 

CN3 

+ 

C147 

C144 

C124 

+ 

8CR 

C136 

C138 

+ 

+ 

TP101 

RX CV 

GND1 

SRR 

8CL 

CV 

9CL 

NC 

A3 : RX VCO (X58-478) 

LD 

EP 

DP 

CP 

FIN 

5C 

LDR 

EPR 

DP 

CP 

REF 

9 

10 

11 

12 


IC4 11A 

IC5 10I 

IC9 7D 


IC10 11I 

Q4 10E 

Q16 10K 


Q17 10J 

D1 7I 

D2 7E 

Pattern 1 

Pattern 2 

Pattern 3 

Pattern 4 


Foil side 

13 

65 66 

14

I 

1 


2 

J72-0757-01 A/2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

L32 

C89 

C90 

R95 

C22 

C103 

Q11 

R96 

C102 

L27 

R82 

R79 

C96 

R13 

C179 

5 

8 

C99 

L22 

R109 

IC1 

X3 

L25 

4 

1 

C23 

R143 

Q8 

R21 

R18 

+ C85 

D8 

R20 

R19 

C164 

R14 

R144 

C166 

+ C25 

+ C24 

C80 

+ 

L26 

C82 

R74 

Q9 

B 

C 

E 

R17 

C178 

+ 

5 

8 

Q23 

C177 

IC2 

L34 

C204 

L35 

C191 

C205 

L36 

C192 

C206 

L37 

C193 

IC11 B 

Q18 

C 

E 

4 

1 

O 

G 

L38 

C207 

C194 

C208 

C150 

C175 

+ 

Q19 

L39 

C195 

C176 

C152 

R133 

C87 

+ 

Q20 

R90 

C143 

R127 

Q15 

C127 + 

R104 L31 

L30 L29 

C126 + 

R121 

Q13 

R120 

Q12 

C142 Q14 

C132 

C19 

C20 

R10 

L11 

R9 

R33 

C30 

L10 

L12 

R36 

R37 

Q2 

C15 

IC6 

C42 

L9 

C45 

R12 

C9 

C190 

C189 

Q1 

E 

C 

B 

L4 

Q6 

C184 

C185 

R7 

C7 

R3 

L8 

C8 

Q10 

R11 

C47 

L33 

D11 

R71 

C6 

C50 

Q5 

TH1 

R72 

R48 

C79 

C57 

D5 

R49 

C54 

C72 + 

R162 

R56 

D3 

D4 

D12 

+ 

C157 

C156 

I 

TKR-750 PC BOARD VIEW 

TX-RX UNIT (X57-6260-XX) (A/2) -10 : K,E -11 : K2 Foil side view 

L40 

R4 

FIN 

5C 

LDT 

EPT 

DP 

CP 

REF 

FIN 

5C 

LDR 

EPR 

DP 

CP 

REF 

GND2 

VO R159 

R151 

R152 

R153 

R154 

GND2 

VO 

R155 

R156 

R157 

R158 

C105 

R160 

C104 

L28 

R92 

C91 

C92 

R94 

C93 

R93 

R91 

X2 

R106 

R15 

R78 

C95 

R97 

R98 

C97 

R100 

C98 

R99 

R77 

R16 

C81 

+ 

R73 

R76 

C84 

C83 

R75 

R148 

C167 

C146 

C106 

C145 

+ 

C100 

O 

G 

R130 

R6 

IC3 

C148 

C149 

C113 

R22 

GND1 

STT 

8CL 

CV 

9CL 

MO 

GND1 

SRR 

8CL 

CV 

9CL 

NC 

C86 

R87 

C88 

R88 

C129 

C123 

C120 

C110 

C111 

R125 

C128 

C122 

C121 

R126 R124 

C133 

C135 

C141 

C108 

C109 

R122 

C131 

C107 

R123 

C130 

C134 

C140 

C18 C17 C16 C14 C13 

C209 

C31 

R34 

C33 

C32 

R35 

C34 

B 

C 

E 

R39 

R38 

L13 

C36 

8 

9 

C41 

R43 

C39 

C38 

C40 

R42 

R40 

1 

16 

C155 

C154 + 

C43 

C163 

16 

1 

IC7 

9 

8 

C11 

C44 

C10 

R5 

C199 

R1 

C46 

C49 

C5 

R51 

C52 

R150 

R163 

R164 

Q3 

L21 

L23 

C73 

C61 

R8 

C197 

R66 

R67 Q7 

C75 

C77 R64 

C78 

R68 

C71 

C4 C3 C1 

C198 

C65 + 

R83 

C69 

C70 

C63 

C56 

R53 

R161 

C68 

C151 

R47 

R165 

R58 

C153 

C55 

R52 

R55 

R166 

C2 

C62 

Q25 

Q24 

L1 

C162 

D7 

12 

13 


IC1 4C 

IC2 10E 

IC3 10E 

IC6 9K 

IC7 9L 


IC11 6E 

Q1 3N 

Q2 7K 

Q3 7O 

Q5 9N 


Q6 9N 

Q7 11P 

Q8 8C 

Q9 8D 

Q10 3N 


Q11 3C 

Q12 9G 

Q13 4G 

Q14 10G 

Q15 5G 


Q18 5E 

Q19 5F 

Q20 2F 

Q23 3D 

Q24 9S 


Q25 9R 

D3 7R 

D4 8R 

D5 11O 

D7 9S 


D8 3D 

D11 10N 

D12 9R 

Pattern 1 

Pattern 2 

Pattern 3 

Pattern 4 


Foil side 

14 

67 68

S 

R 

Q 

P 

O 

N 

M 

L 

K 

J 

I 

H 

G 

F 

E 

D 

C 

B 

A 

1 

2 

3 

4 

5 

6 

7 

8 

9 

10 

11 

12 

13 

14 

J72-0757-01 A/2 

CN18 

L2 

A4 

A5 

L3 

A6 

L5 

A7 

L6 

A8 

L7 

C125 

+ 

8CLT TP102 

TX CV 

C137 

C139 

+ 

+ 

CN1 

A10 

A1 

CN3 

C124 

+ 

8CR 

C136 

C138 

+ 

+ 

CN19 

CN16 

1 

8 

GND 

RSW 

8T 

PC 

FAS 

PDT 

BUP 

VTM 

A2 : TX VCO 

(X58-479) 

GND1 

STT 

8CL 

CV 

9CL 

MO 

GND2 

VO 

FIN 

5C 

LDT 

EPT 

DP 

CP 

REF 

FC 

DP 

CP 

EP 

LD 

A3 : RX VCO (X58-478) 

GND1 

SRR 

8CL 

CV 

9CL 

NC 

GND2 

VO 

FIN 

5C 

LDR 

EPR 

DP 

CP 

REF 

LD 

EP 

DP 

CP 

TP101 

RX CV 

CN15 

3 

1 

B 

B 

B 

CF1 

WIDE 

CF2 

NARROW 

PSW 

K1 

SB 

IC4 

O 

G 

I 

8CR 

MO 

F1 

SRR STT 

TX 

SOE 5CR 

LD2 

FCT 

FCR 

CK 

DT 

STB4 

IC10 

O 

I 

G 

9V 

C147 

+ 

C158 

C174 

+ 

+ 

Q16 

IC5 

CN4 

1 2 

36 

35 

NC 

NC 

ASQ 

NC 

CP 

EPT 

LDT 

CK 

FWD 

BUP 

TEMP 

GND 

MO 

GND 

NC 

SB 

SB 

8C 

DET 

GND 

RSSI 

DP 

EPR 

LDR 

DT 

STB4 

LD2 

PSW 

SOE 

MB 

GND 

NC 

SB 

SB 

NC 

8C 

Q17 

B 

C 

E 

I 

G 

O 

Q4 

C76 

+ 

X1 

1 

2 

L20 

CN4 

1 

2 

CN2 

IC9 

1 

10 11 

20 

L24 

D2 

L19 

L18 

L17 

L14 

L16 

L15 

XF2 

XF1 

A9 

D1 

NARROW 

WIDE 

R50 

R61 

R59 

R57 

R46 

R65 

C53 

C58 

C59 

C67 

C210 

C211 

C64 

C60 R54 

R45 

R60 

R44 

R62 

R63 

C51 

C196 

C74 

C48 

C66 

R69 

R142 

R141 

R139 

R137 

C161 

C173 

C172 

C171 

C160 

C159 

C144 

R128 

R140 

R138 

R129 

R41 

C37 

C212 

C213 

L41 

R111 

R31 

R32 

R30 

R110 

R112 

Q11 

Q23 

L39 

L22 

R95 

R82 

R21 

R20 

R19 

R90 

C15 

R12 

C9 

C8 

C7 

R3 

C6 

R7 

R18 

C82 

R74 

R79 

C89 

R96 

R109 

C179 

C103 

C102 

C177 

C175 

C176 

C143 

R127 

C20 

R10 

R9 

C19 

C152 

R133 

C204 

C191 

C192 

C193 

C194 

C195 

C205 

C206 

C207 

C208 

L34 

L35 

L36 

L37 

L38 

R143 

R144 

C164 

C166 

C96 

C23 

R14 

C99 

R13 

C22 

D8 

R17 

IC1 

1 

4 5 

8 

C85 + 

C25 + 

C24 + 

X3 

L27 

C80 

C178 

IC11 Q18 

O 

G 

I 

B 

C 

E 

+ 

C87 

C150 

+ 

+ 

+ 

Q19 

Q20 

C127 

+ 

Q13 

Q15 

L9 

L4 

Q1 

E 

C 

B 

Q10 

L8 

L33 

L1 

D3 

D4 

D12 

D7 

Q25 

Q24 

C151 

+ 

Q7 

C72 

+ D5 

C79 

R72 

R71 

C185 

C189 

C190 

C184 

TH1 

D11 

Q6 

Q5 

IC6 Q2 

L11 

R33 

C30 

L10 

L12 

R36 

R37 

C42 

C45 

C47 

C50 

C57 

C54 

R48 

R49 

R56 

R162 

R165 

R166 

C162 

C153 

C157 

C156 

R83 

R55 

R58 

C63 

C62 

C68 

C56 

R47 

C55 

R52 

R53 

C49 

R163 

R164 

C46 

C44 

C39 

C38 

C43 

C209 

B 

C 

E 

IC7 

1 

1 

8 

8 

9 

9 

16 

16 

C154 

+ 

L13 

L23 

Q3 

L21 

C65 

C197 

+ 

L32 

Q8 

Q9 

B 

C 

E 

L25 

L26 

L31 

R104 

L30 

L29 

C126 

+ 

Q12 

Q14 

IC2 

1 

4 5 

8 

O 

G 

I 

C145 

C83 

C90 

R75 

R73 

R76 

R77 

IC3 

C81 

+ 

+ 

X2 

L28 

R160 

R92 

R94 

R97 

R22 

C88 

R88 

R99 

R100 

R98 

R93 

C91 

C95 

C97 

C106 

C100 

C113 

C128 

R120 

R123 

R126 

R124 

C122 

C121 

C130 

C132 

C134 

C140 

C142 

C110 

C111 

C148 

C146 

C105 

C104 

C149 

C109 

C107 

C108 

C98 

C92 

C93 

R91 

C84 

R155 

R156 

R157 

R158 

R159 

R106 

R148 

C167 

R15 

R16 

R78 

R151 

R152 

R153 

R154 

R130 

R6 

C86 

R87 

R125 

C133 

C135 

C141 

C129 

R121 

R122 

C123 

C131 

C120 

C18 

C17 

C16 

C14 

C13 

C10 

C11 

L40 

R4 

R5 

C199 

R11 

R1 

C5 

C4 

C3 

C1 

C2 

R34 

C31 

C41 

R43 

R40 

C40 

R42 

C36 

R38 

R39 

C33 

C32 

C34 

R35 

C163 

C155 

R51 

C52 

R150 

C198 

R8 

C69 

C70 

C61 

R161 

C73 

C71 

C75 

C77 

C78 

R66 

R64 

R68 

R67 

69 70 

TX-RX UNIT (X57-6260-XX) (A/2) -10 : K,E -11 : K2 Component side view + Foil side 


Foil side 

Pattern 1 

Pattern 2 

Pattern 3 

Pattern 4 




IC1 

4Q 

IC2 

10O 

IC3 

10O 

IC4 

11A 

IC5 

10I 

IC6 

9I 


IC7 

9H 

IC9 

7D 

IC10 

11I 

IC11 

6O 

Q1 

3F 

Q2 

7I 


Q3 

7E 

Q4 

10E 

Q5 

9F 

Q6 

9F 

Q7 

11D 

Q8 

8Q 


Q9 

8P 

Q10 

3F 

Q11 

3Q 

Q12 

9M 

Q13 

4M 

Q14 

10M 


Q15 

5M 

Q16 

10K 

Q17 

10J 

Q18 

5O 

Q19 

5N 

Q20 

2N 


Q23 

3P 

Q24 

9A 

Q25 

9B 

D1 

7I 

D2 

7E 

D3 

7B 


D4 

8B 

D5 

11E 

D7 

9A 

D8 

3P 

D11 

10F 

D12 

9B

1 


2 

1 

3 

4 

5 

6 

7 

8 

9 

IC627 

I 

G 

O 

+ C826 

GND 

VDD 

OUT 

IC601 

C806 

+ 

D600 

+ 

C645 

+ C646 

C780 

C786 

C769 

C766 

CN600 

20 

MIC 

5C 

K5 

K3 

HK/RXD1 

PTT/TXD1 

CLK 

PSW 

NC 

SB 

19 

MIG 

VLI 

K4 

K2 

K1 

SOE 

STB1 

DAT 

GND 

SB 

3.3D 

2 

1 

C600 

R601 

C781 

IC625 

G 

C770 

C765 

C767 

R658 

CP600 

DEI 

R657 

R655 

R607 

R609 

CP601 

DEO 

C642 

R792 

R611 

I 

O 

G 

IC624 

G 

IC628 

O 

I 

I 


TX-RX UNIT (X57-6260-XX) (B/2) -10 : K,E -11 : K2 Component side view 

C785 

L601 

L604 

C613 

R603 

C623 

C825 

R604 

R605 

C644 

C691 

O 

+ 

L606 

L607 

R653 

CN601 

1 

TXI 

TXO 

RXI 

AC 

BC1 

BC2 

BC3 

BC4 

PTI 

CLRC 

RXO 

PTO 

5C 

GND 

14 

+ 

1 

8 

1 

8 

9 

16 

R654 

IC605 

IC602 

IC623 

16 

16 

9 

8 

1 

9 

R612 

D624 

R756 

R755 

R613 

R784 

1 

C803 

R785 

1 

D621 

D626 

SB 

SB 

GND 

GND 

D614 

R769 

L613 

R793 

C808 

CN603 

R788 

L612 

L611 

R797 

D618 

L610 

C810 

1 

8C 

4 

R789 

C805 

CN604 

L609 

C813 

R800 

R801 

CN605 

SPO 

SPG 

L608 

2 

D629 

AO5 

AO4 

AO3 

SPO 

SPO 

AO2 

AO1 

SPI 

RSI 

RD 

SPG 

SPG 

R770 

R796 

IC630 

I 

G 

O 

C801 + 

C795 

D625 

C681 + 

C800 

+ 

C817 

+ 

12 

+ C823 

C663 + 

R812 

SB 

C814 

8 

1 

+ 

R742 

C702 + 

C657 

R781 

R676 

C652 

C649 

R674 

IC607 

4 6 

R669 

R672 

CN606 

30 

29 

C788 

R675 

C760 

R671 

C789 

C798 

+ 

C811 

+ 

NC 

NC 

NC 

EMON 

EPTT 

SC 

NC 

TXG 

IO1 

IO2 

IO3 

IO4 

IO5 

IO6 

NC 

NC 

NC 

RXD2 

TXD2 

AI1 

AI2 

AI3 

DG 

TD 

TA 

RD 

RA 

RXG 

SPM 

NC 

R764 

C772 

+ 

R765 

+ 

C790 

C827 

ANI 

C816 C818 

+ 

C819 

C812 

R751 

C820 

C809 

R771 

C807 

R768 

C804 

R766 

C762 

C802 

R760 

10 

C799 

R752 

C796 

R749 

C794 

C792 

R750 

+ 

C773 

IC629 

2 

1 

C774 

+ 

C828 

J72-0757-01 B/2 

10 

11 


IC601 5B 

IC602 7L 

IC605 6L 

IC607 8P 

IC623 8L 


IC624 3G 

IC625 3K 

IC627 3B 

IC628 3G 

IC629 4S 


IC630 4N 

D600 4B 

D614 6M 

D618 6N 

D621 7M 


D624 7M 

D625 7N 

D626 4N 

D629 6O 

Pattern 1 

Pattern 2 

Pattern 3 

Pattern 4 


Foil side 

12 

13 

14 

71 72

A 

B 

C 

D 

E 

F 

G 

H 

I 

J 

K 

L 

M 

N 

O 

P 

Q 


R 

S 

1 

TX-RX UNIT (X57-6260-XX) (B/2) -10 : K,E -11 : K2 Foil side view 

2 

R763 

C784 

C787 

C793 

C797 

G 

D 

Q610 

S 

2 

CN602 

8C 

SB 

SB 

NC 

GND 

MO 

GND 

TEMP 

BUP 

FWD 

CK 

LDT 

EPT 

CP 

NC 

ASQ 

NC 

NC 

8C 

NC 

SB 

SB 

NC 

GND 

MB 

SOE 

PSW 

LD2 

STB4 

DT 

LDR 

EPR 

DP 

RSSI 

GND 

DET 

1 

35 36 

Q602 Q601 

D 

S 

G 

3 

D620 

8 

9 

D623 

R775 

R777 

C777 

D616 

R782 

C775 

R776 

IC620 

D612 

R778 

R780 

R779 

C779 

R772 

R773 

R786 

16 1 C776 

+ + + + 

C763 

C761 

J72-0757-01 B/2 

D610 

D622 

R794 

R754 

Q606 

R790 

IC622 

D608 

D617 

D613 

R758 

3 

4 

D606 

R774 

1 

5 

4 3 

5 1 

IC621 

C778 

R744 

+ 

R745 C764 

Q605 

R798 

R809 

R743 

D619 

D607 

D628 

R815 

R747 

R803 

C729 + 

R807 

C730 

Q611 

D615 

D609 

R804 

C822 

8 

1 

R721 

R805 

IC617 

R753 

4 5 

C815 

D611 

C723 

+ C722 

R802 

C746 + 

R732 R736 

R783 R787 R791 R810 R808 R806 C736 

R795 

R799 

R719 

C821 

R715 

R713 

R762 C783 

Q609 

C791 

R709 

R714 

R767 

C744 

C670 

+ 

+ 

C692 

R737 C739 

C758 

R681 

R682 

+ 

C701 

R741 

R728 

1 

8 

4 5 

IC619 

1 

R740 

R729 

+ 

C699 

IC615 

+ 

C720 

24 

12 13 

5 

8 

R739 

C743 

IC611 

R679 

4 

1 

R738 

R735 

C740 

C715 

C705 

R685 

R686 

C605 

R811 

+ C680 

R684 

C690 

C602 

R673 

IC608 

4 3 

C648 

C679 

+ 

D627 

5 1 

+ 

C697 

C706 + 

C700 + 

R710 

R717 

C647 

R670 

C703 

C704 

C726 

R718 

C724 

+ 

C698 

R668 

R708 

R707 

+ C643 

1 

1 

4 

C685 

C639 

G 

I 

O 

IC614 

8 9 

IC616 

16 

C728 

8 

5 

C684 

R683 

IC610 

4 3 

5 1 

R680 

C782 

R690 C768 

IC626 

C721 

+ 

+ 

C771 

R722 

R608 

R678 

+ 

C662 

R712 

C725 

R610 

R695 

D601 

R689 

R694 

R696 

R698 

IC612 

1 5 

3 4 

8 

9 

R693 

IC613 

C707 

C695 

C708 

C696 

C709 

C711 

1 

16 

L605 

R691 

R692 

R697 

R813 

C693 

+ 

+ 

C694 

+ 

C710 

C712 

C717 

C718 

C713 + 

C714 + 

R702 

R700 

Q603 

IC618 

+ C733 

C727 

Q604 

R731 S 

G 

D 

C745 

36 

1 

37 144 

72 

109 

73 108 

C719 

C716 

R701 

R699 

R706 

R705 

R703 

R720 

R704 

R723 

R734 

R724 

C738 

C731 

C732 

C735 

R727 

C737 

C734 

R733 

C741 

C742 

R726 

X601 

+ 

13 

24 

13 

24 

IC606 

12 

1 

C749 

C750 

+ C754 

C747 

C759 

+ C757 

+ C753 

C752 

C748 

+ C756 

C755 

C751 

R730 

IC603 

12 

1 

R688 

R687 

C824 

CP603 

R616 

R606 

R640 

R642 

L603 

R644 

R614 

R630 

R631 

R636 

R637 

R643 

R645 

R646 

R667 

R662 

CP606 

CP609 

R663 

R666 

5 

8 

IC600 

C616 

R627 

R628 

R635 

R639 

R641 

R647 

R648 

R649 

R650 

R651 

R665 

R664 

CP607 

4 

1 

R652 

R626 

R625 

R622 

R624 

25 

26 

R621 

R623 

R633 

R620 

R634 R814 

R619 

C638 

CP619 CP617 CP615 

1 

CP618 

IC604 

CP616 

IC609 

X600 

C635 C634 C629 

R629 

R600 

C614 

CP614 

R615 

D 

S 

G Q600 

R602 

1 

100 

50 

51 75 

76 

CP604 

CP605 

CP613 

32 

16 17 

CP602 

R618 

R638 

C641 

+ C640 

CP608 

CP611 CP610 

R661 

R660 

R659 

R656 

CP612 

L602 

L600 

4 

5 

6 

7 

8 

9 


IC600 4O 

IC603 9M 

IC604 6P 

IC606 4M 

IC608 5G 

IC609 9P 

IC610 5H 


IC611 9E 

IC612 7I 

IC613 8I 

IC614 7G 

IC615 7E 

IC616 9G 

IC617 8D 


IC618 6L 

IC619 6E 

IC620 8A 

IC621 5B 

IC622 4B 

IC626 7H 

Q600 4Q 


Q601 3J 

Q602 3J 

Q603 4K 

Q604 8L 

Q605 5B 

Q606 4B 

Q609 4D 


Q610 3D 

Q611 4C 

D601 6I 

D606 7B 

D607 7C 

D608 6B 

D609 7C 


D610 6B 

D611 6D 

D612 6A 

D613 8B 

D615 6C 

D616 7A 

D617 8B 


D619 6C 

D620 6A 

D622 7B 

D623 6A 

D627 4G 

D628 4C 

Pattern 1 

Pattern 2 

Pattern 3 

Pattern 4 


Foil side 

10 

11 

12 

13 

73 74 

14

I 

I 

I 

1 



2 

TX-RX UNIT (X57-6260-XX) (B/2) -10 : K,E -11 : K2 Component side view + Foil side 

3 

4 

5 

6 

7 

8 

9 

IC627 

I 

G 

O 

+ C826 

C785 

L601 

L604 

C613 

R603 

GND 

VDD 

OUT 

IC601 

L600 

C623 

L602 

CP612 

C825 

CP604 

CP611 CP610 

C806 

+ 

CP602 

R604 

C640 + 

CP608 

R605 

CP605 

R615 

CP613 

32 

17 

CP614 

X600 

CP615 

C644 

C638 

IC604 

CP616 

IC609 

R634 R814 

R619 

+ 

C645 

R633 

R620 

CP617 

R621 

R623 

CP618 

R622 

R624 

R625 

1 25 

100 

26 

76 

75 

C629 C634 C635 

Q600 G S D R629 

D600 

R618 

R602 R600 

R661 

R660 

R659 

R656 

R638 

C641 

C614 

50 

51 

CP619 

1 

R626 

+ C646 

C691 

16 

4 5 

1 

IC600 

CP607 

R652 

R664 

8 

C616 

R627 

R628 

R635 

R639 

R641 

R647 

R648 

R649 

R650 

R651 

R665 

R666 

CP606 

CP609 

R663 

R616 

R606 

R640 

R642 

L603 

R644 

R614 

R630 

R631 

R636 

R637 

R643 

R645 

R646 

R667 

R662 

CP603 

R688 

R687 

C824 

1 

C780 

C754 + 

C757 + 

C753 + 

C756 + 

1 

C786 

IC606 

O 

G 

IC624 

G 

12 13 

C749 

C750 

C747 

C759 

C752 

C748 

C755 

C751 

R730 

24 

12 13 

IC603 

24 

O 

IC628 

C745 

+ 

C769 

+ 

C766 

CN600 

20 

MIC 

5C 

K5 

K3 

HK/RXD1 

PTT/TXD1 

CLK 

PSW 

NC 

SB 

19 

MIG 

VLI 

K4 

K2 

K1 

SOE 

STB1 

DAT 

GND 

SB 

L606 

C733 + 

IC618 

3.3D 

C717 

Q601 Q602 

S 

G D 

2 

1 

C600 

+ C713 

1 36 

144 

37 

109 

108 

X601 

C741 

C742 

R726 

R727 

C737 

C734 

R733 

C731 

C732 

R724 

Q603 

72 

73 

C727 

Q604 + C714 

D 

G 

S R731 

C719 

C735 

C716 

C738 

R723 

R734 

R720 

R704 

R706 

R705 

R703 

R701 

R699 

R702 

R700 

C718 

R601 

R691 

R692 

R697 

R813 

C693 

+ 

+ 

C694 

+ 

C710 

C712 

C781 

C707 

C695 

C708 

C696 

C709 

C711 

1 

16 

L605 

IC625 

G 

R693 

IC613 

L607 

R653 

CN601 

14 

O 

R695 

1 

D601 

R689 

TXI 

TXO 

R694 

RXI 

R696 AC 

R698 BC1 

BC2 

IC612 BC3 

5 1 BC4 

4 3 PTI 

CLRC 

RXO 

PTO 

5C 

GND 

8 

9 

C770 

C765 

C767 

R608 

R658 

CP600 

R657 

R655 

R607 

R609 

CP601 

C685 

C642 

R792 

R611 

R612 

R613 

R784 

1 

1 

D626 

SB 

SB 

GND 

GND 

L613 

R793 

C808 

R788 

C648 

L612 

L611 

R797 

L610 

C810 

1 

4 

R789 

L609 

C813 

C805 

C740 

R800 

R735 

L608 

AO5 

AO4 

AO3 

SPO 

SPO 

AO2 

AO1 

SPI 

RSI 

R801 

R684 

SPO 

R685 

SPG 

R738 

D629 

R739 

2 

RD 

SPG 

SPG 

D625 

C800 

+ 

8C 

C787 

IC630 

I C817 

C789 

+ 

G 

+ 

+ 

R754 

O 

Q606 

IC629 

C783 R762 

D627 

R811 

SB 

C801 + 

C791 

Q609 Q611 

+ 

R767 

C795 

R802 C815 C798 

C814 

+ 

C684 

C764 R745 

R654 DEO 

R668 C647 

+ 

Q605 

DEI 

R683 C643 + R673 

R747 

CN603 

10 

C811 

3 4 

IC610 3 4 

3 4 

+ C746 

IC608 

D614 D618 

+ 

IC621 

1 5 

1 5 

1 5 

1 16 

+ 

R680 

R670 

C803 

8 1 

D610 D612 

D623 

IC605 

R785 

5 4 

C782 C639 

IC619 C736 

R775 

R806 R808 

R776 

IC626 + + 

+ + + + 

R810 R791 R 787 R783 

R780 R778 D620 

G 

8 9 I 

+ 

CN604 

R777 

1 16 O 

C768 

C703 

R690 D621 

24 1 

R773 

+ 

R799 R795 

IC602 

16 1 

8 9 

C706 

C715 

C702 + 

IC614 

D624 

+ 

IC615 

C649 

D617 C792 

C700 

C705 

+ + + + 

9 8 

R796 

C723 

C657 R674 

R750 

9 8 R756 R770 

R715 

C704 

R709 

R708 

+ 

IC623 

CN605 

13 12C823 

+ C728 R707 C680 + 

R714 + + 

16 

D613 

1 

+ C729 

R712 8 1 4 5C663 + 

IC616 

+ + 

R755 R769 

+ 

IC611 R812 + 

R718 

R713 

C763 

5 4 

1 

C724 

8 

R676 R669 R671 R719 

R710 

C681 + C692 

C761 

R679 

C652 R672 

C722 + C821 

J72-0757-01 B/2 

R610 

R678 

C662 

C725 

35 36 

C771 

C721 

CN602 

NC 

NC 

ASQ 

NC 

CP 

EPT 

LDT 

CK 

FWD 

BUP 

TEMP 

GND 

MO 

GND 

NC 

SB 

SB 

8C 

DET 

GND 

RSSI 

DP 

EPR 

LDR 

DT 

STB4 

LD2 

PSW 

SOE 

MB 

GND 

NC 

SB 

SB 

NC 

8C 

R722 

C698 

C726 

C697 

R717 

C602 

C679 

2 

1 

C605 

C690 

R686 

C720 

C743 

R740 

R729 

R741 

R728 

C699 

12 

C701 

R737 C739 

C758 

R681 

R682 

S 

R781 

R732 R736 

C744 

R742 

8 

C670 

IC607 

1 

D 

Q610 

G 

D611 

4 6 

R753 

R805 

D615 

CN606 

C788 

29 30 

R764 NC D609 NC 

R765 

NC 

NC 

R804 

RXD2 

NC 

C790 

TXD2 

R803 

EMON 

C816 AI1 

EPTT C818 

C812 AI2 

SC C819 

AI3 

D607 

C809 

NC 

C820 

DG R798 TXG 

TD 

TA D606 IO1 IO2 

C807 

C804 

RD 

IO3 

R794 RA 

IO4 

C802 

C776 RXG 

IO5 

C799 

D622 

SPM 

IO6 C796 

NC R772 NC C794 

C779 1 R779 2 

4 5 

C760 R675 

IC617 R721 

C772 

8 

1 

C822 

C797 

R807 

D628 

ANI 

R815 

D619 

C827 

C730 

C793 

C778 

R743 

R744 

R751 

R763 

C784 

R774 

R809 

1 

5 

R771 

R758 

3 

4 

D608 

R768 

IC622 

R766 

C762 

R790 

R760 

1 

R752 

R786 

R749 

1 

16 

C773 

C774 

C828 

R782 

C775 

IC620 

D616 

C777 

8 

9 

10 

11 


IC600 4E 

IC601 5B 

IC602 7L 

IC603 9G 

IC604 6D 

IC605 6L 

IC606 4G 


IC607 8P 

IC608 5M 

IC609 9D 

IC610 5L 

IC611 9O 

IC612 7K 

IC613 8K 


IC614 7M 

IC615 7O 

IC616 9M 

IC617 8P 

IC618 6H 

IC619 6O 

IC620 8S 


IC621 5R 

IC622 4R 

IC623 8L 

IC624 3G 

IC625 3K 

IC626 6M 

IC627 3B 


IC628 3G 

IC629 4S 

IC630 4N 

Q600 4C 

Q601 3J 

Q602 3J 

Q603 4I 


Q604 8H 

Q605 5R 

Q606 4R 

Q609 4P 

Q610 3P 

Q611 4Q 

D600 4B 


D601 6K 

D606 7R 

D607 7Q 

D608 6R 

D609 7Q 

D610 6R 

D611 6P 


D612 6S 

D613 8R 

D614 6M 

D615 6Q 

D616 7S 

D617 8R 

D618 6N 


D619 6Q 

D620 6S 

D621 7M 

D622 7R 

D623 6S 

D624 7M 

D625 7N 


D626 4N 

D627 4M 

D628 4Q 

D629 6O 

Pattern 1 

Pattern 2 

Pattern 3 

Pattern 4 


Foil side 


12 

13 

14 

75 76

A 

B 

C 

Note : Components marked with a dot (·) are parts of pattern 1. 

D 

E 

F 

G 

H 

I 

J 

K 

L 

M 

N 

O 

P 

Q 

R 

S 

CIRCUIT DIAGRAM TKR-750 

T 

1 

2 

3 

4 

5 

6 

7 

80

1 


T 

TKR-750 CIRCUIT DIAGRAM 


2 

3 

4 

5 

6 

7 

81

A 

B 

C 


D 

E 

F 

G 

H 

I 

J 

K 

L 

M 

N 

O 

P 

Q 

R 

S 

CIRCUIT DIAGRAM TKR-750 

T 

1 

2 

3 

4 

5 

6 

7 

88


BLOCK DIAGRAM 



89


KES-4 (EXTERNAL SPEAKER) 

When Using an External Speaker 

1. Make sure the unit‘s power is tuned off. 

2. When using the external speaker, remove the jumper 

lead from the connector, and attach the speaker cable. 

3. When not using the external speaker, replace the jumper 

lead and insert the connector into the speaker jack (pin9 

and 12). 

BACK UP 

KES-4 

Jumper lead 

Connector 

15 

12 

6 

3 

13 

1 

Crimp terminal 

(E23-0613-05) 

Black lead 

Black/White lead 

Speaker cable 

Specifications 

Speaker size ........................................... 120mm 

Maximum input power .......................... 20W 

Impedance ............................................. 4Ω 

Frequency response .............................. 100 to 5000Hz 

Dimensions (W x H x D) ........................ 127 x 127 x 65 mm 

projection not included 5 x 5 x 2-9/16 inch 

Weight ................................................... 780g / 1.72 lbs 

92

SPECIFICATIONS (K,K2 TYPE) 


GENERAL 

Frequency Range ................................ K : 146 to 174MHz K2 : 136 to 150MHz 

Number of Channels ........................... 16 channel 

Channel Spacing ................................. Wide : 30kHz, 25kHz Narrow : 15kHz, 12.5kHz 

(PLL channel stepping 2.5kHz/5kHz/6.25kHz/7.5kHz) 

Operating Voltage ............................... 13.6V DC±15% 

Current Drain 

Standby .......................................... 0.8A 

Standby w/power save .................. 0.3A (Operationg mode DC-IN : Backup, FAN : Temp, SAVE : ON, DISP : OFF) 

Receive .......................................... 1.2A 

Transmit/Receive ........................... Less than 13A 

Duty Cycle 

Receive .......................................... 100% 

Transmit ......................................... 100% (100% @25W) 

Frequency Stability ............................. Less than ±0.0002% –30°C to +60°C (–22°F to +140°F) 

Antenna Impedance ........................... 50Ω 

Operating Temperature Range ........... –30°C to +60°C (–22°F to +140°F) 

Dimensions ......................................... 483 (19) W x 88 (3-1/2) H x 340 (13-1/3) D mm (inch) 

Weight ................................................ 9.7kg (21.4 lbs.) 

RECEIVER (Measured by TIA/EIA-603) 

Sensitivity 

12dB SINAD ................................... 0.35µV 

20dB Quieting ................................ 0.45µV 

Selectivity ........................................... Wide : 85dB (±30kHz) Narrow : 80dB (15kHz), 77dB (12.5kHz) 

Intermodulation................................... Wide : 80dB (±30kHz/±60kHz) Narrow : 75dB (±15kHz/±30kHz) 

Hum and Noise ................................... Wide : 50dB Narrow : 45dB 

Spurious & Image Rejection ............... 90dB 

Audio Output (Ext. Speaker) ............... 4W at 4Ω less than 5% distortion 

Audio Distortion (Ext. Speaker) .......... Less than 2.5% at 1000Hz 

Band Spread ....................................... 3MHz 

TRANSMITTER (Measured by TIA/EIA-603) 

RF Power Output ................................ 50W adjustable to 25W (100% duty @25W) 

Type of Emission ................................ Wide : 16K0F3E Narrow : 11K0F3E 

Spurious Response ............................. 80dB 

FM Hum and Noise ............................ Wide : 50dB Narrow : 45dB 

Audio Distortion .................................. Less than 3% at 1000Hz 

Microphone Impedance...................... 600Ω 

Band Spread ....................................... K : 28MHz K2 : 14MHz 

93


SPECIFICATIONS (E TYPE) 

GENERAL 

Frequency Range ........................................ 146 to 174MHz 

Number of Channels .................................. 16 channel 

Channel Spacing ......................................... Wide : 25kHz Narrow : 12.5kHz (PLL channel stepping 5kHz/6.25kHz) 

Operating Voltage ....................................... 13.2V DC 

Current Drain 

Standby ................................................... 0.8A 

Standby w/power save ........................... 0.3A (Operationg mode DC-IN : Backup, FAN : Temp, SAVE : ON, DISP : OFF) 

Receive ................................................... 1.2A 

Transmit/Receive .................................... Less than 13A 

Duty Cycle .................................................. Receive : 100% Transmit : 100% (100% @25W) 

Frequency Stability ..................................... Less than ± 0.0002% –30°C to +60°C 

Antenna Impedance ................................... 50Ω 

Operating Temperature Range................... –30°C to +60°C 

Dimensions ................................................. 483 W x 88 H x 340 D mm 

Weight ........................................................ 9.7kg 

RECEIVER (Measured by ETS 300 086) 

Sensitivity ................................................... 0.45µV 

Adjucent Channel Selectivity ..................... 85dB (± 25kHz) 77dB (± 12.5kHz) 

Intermodulation .......................................... 72dB 

Spurious & Image Rejection....................... 90dB 

Audio Output (Ext. Speaker)....................... 4W at 4Ω less than 5% distortion 

Audio Distortion (Ext. Speaker) .................. Less than 2.5% at 1000Hz 

Band Spread ............................................... 3MHz 

TRANSMITTER (Measured by ETS 300 086) 

RF Power Output ........................................ 50W adjustable to 25W (100% duty @25W) 

Modulation Limiting.................................... ± 5kHz at ± 25kHz ±2.5kHz at ± 12.5kHz 

Spurious Emission ...................................... –36dBm ≤ 1GHz –30dBm > 1GHz 

FM Noise (EIA) ........................................... 25kHz : 50dB 12.5kHz : 45dB 

Modulation Distortion ................................. Less than 3% at 1000Hz 

Microphone Impedance ............................. 600Ω 

Band Spread ............................................... 28MHz 

KENWOOD CORPORATION 

14-6, Dogenzaka 1-chome, Shibuya-ku, Tokyo 150-8501, Japan 

KENWOOD SERVICE CORPORATION 

P.O. BOX 22745, 2201 East Dominguez Street, Long Beach, CA 90801-5745, U.S.A. 

KENWOOD ELECTRONICS CANADA INC. 

6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8 

KENWOOD ELECTRONICS DEUTSCHLAND GMBH 

Rembrücker Str. 15, 63150 Heusenstamm, Germany 

KENWOOD ELECTRONICS BELGIUM N.V. 

Mechelsesteenweg 418 B-1930 Zaventem, Belgium 

KENWOOD ELECTRONICS FRANCE S.A. 

13, Boulevard Ney, 75018 Paris, France 

KENWOOD ELECTRONICS U.K. LIMITED 

KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB United Kingdom 

KENWOOD ELECTRONICS EUROPE B.V. 

Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands 

KENWOOD ELECTRONICS ITALIA S.p.A. 

Via G. Sirtori, 7/9 20129 Milano, Italy 

KENWOOD IBERICA S.A. 

Bolivia, 239-08020 Barcelona, Spain 

KENWOOD ELECTRONICS AUSTRALIA PTY. LTD. 

(A.C.N. 001 499 074) 

16 Giffnock Avenue, Centrecourt Estate, North Ryde, N.S.W. 2113 Australia 

KENWOOD ELECTRONICS (HONG KONG) LTD. 

Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Kwai Fong, N.T., Hong Kong 

KENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD. 

Sales Marketing Division 

1 Ang Mo Kio Street 63, Singapore 569110

TKR-750 service manual

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