UHF FM REPEATER

TKR-850

SERVICE MANUAL REVISED

This Service Manual was revised based on the service manual as per parts No. B51-8557-00, in order to include new variants with the following destination codes : K3.
Knob (DC source) (K29-9106-04) Panel (Outer) (A62-0840-03) Knob (VOL) (K29-5389-03)
2001-5 PRINTED IN JAPAN B51-8557-10 (N) 1233

Panel assy (A62-0934-03)

Key top (K29-5460-02)
Modular jack (E08-0877-05)

CONTENTS

GENERAL.. 2 SYSTEM SET-UP.. 2 OPERATING FEATURES. 3 REALIGNMENT.. 11 INSTALLATION.. 13 MODIFICATION.. 15 DISASSEMBLY FOR REPAIR.. 17 CIRCUIT DESCRIPTION. 18 SEMICONDUCTOR DATA.. 24 DESCRIPTION OF COMPONENTS. 26 PARTS LIST.. 28 EXPLODED VIEW. 39 PACKING.. 41 ADJUSTMENT.. 42 TERMINAL FUNCTION.. WIRING.. PC BOARD VIEWS RX PLL/VCO (X58-4800-XX). TX PLL/VCO (X58-4810-XX).. DISPLAY UNIT (X54-3330-20). FINAL UNIT (X45-3630-XX). TX-RX UNIT (X57-6270-XX) (A/2). TX-RX UNIT (X57-6270-XX) (B/2). SCHEMATIC DIAGRAM. BLOCK DIAGRAM.. KES-4 (EXTERNAL SPEAKER).. SPECIFICATIONS. 94 95

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 this publication date. Changes which may occur after publication are covered by either Service Bulletins or Manual Revisions, which are issued as required.

PERSONNEL SAFETY

The following precautions are recommended for personnel safety : DO NOT transmit until all RF connectors are secure and any open connectors are properly terminated. SHUT OFF this equipment when near electrical blasting caps or while in an explosive atmosphere. This equipment should be serviced by only qualified technicians.
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, and 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.

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 450~480 TX/RX 480~512 TX/RX 400~430 TX/RX 440~470 RF power 40W 40W 40W 40W Type K K2 K3 E
See page 11. Repeater A personal computer (IBM PC or compatible), programming interface (KPG-46), programming & setup and programming software (KPG-66D) are required for programming. DC power supply or duplexer? NO YES
Installation in the optional space

External speaker? NO

KES-4 installation

Delivery

OPERATING FEATURES

3. Programmable Functions
TKR-850 contains many Programmable Functions tabled below.
Programmable Function AUX Out 1~5 Off AUX I/O 1~6 Off AUX Out 1~5 On AUX I/O 1~6 On AUX Out 1~5 On/Off AUX I/O 1~6 On/Off Channel 1~16 Channel Down Channel Up CW ID On CW Message 1~8 On Display Off Display On Display On/Off Description AUX Out 1 to 5 ports become deactivated, respectively. AUX I/O 1 to 6 ports become deactivated, respectively. AUX Out 1 to 5 ports become activated, respectively. AUX I/O 1 to 6 ports become activated, respectively. AUX Out 1 to 5 ports are toggled between its active and inactive states, respectively. AUX I/O 1 to 6 ports are toggled between its active and inactive states, respectively. Directly select Channel 1 to 16, respectively. The channel decrements by one. The channel increments by one. The CW ID is transmitted. The CW Message 1 to 8 is transmitted, respectively. All panel LEDs are turned off except the Power LED. All panel LEDs become active as normal status indicators on the repeater. All panel LEDs, with the exception of the Power LED, are toggled between off and their normal status on the repeater. Hold Time Enable Hold Time Disable Hold Time Disable/Enable Local Tx Disable Local Tx Enable Local Tx Disable/Enable Monitor Off Monitor On Monitor On/Off Monitor Momentary Multi Table Sub Multi Table Main Multi Table Main/Sub QT/DQT Dec Disable QT/DQT Dec Enable QT/DQT Dec Disable/Enable QT/DQT Enc Disable QT/DQT Enc Enable QT/DQT Enc Disable/Enable Repeat Disable Repeat Enable Repeat Disable/Enable Reset DC Power Save Off DC Power Save On DC Power Save On/Off The Parameter of Repeat Hold Time is enabled. The Parameter of Repeat Hold Time is disabled. The Parameter of Repeat Hold Time is toggled between disabled and enabled. The local mics PTT is disabled. The local mics PTT is enabled. The local mics PTT is toggled between disabled and enabled. The QT/DQT decoder is disabled. The QT/DQT decoder is enabled. The QT/DQT decoder is toggled between disabled and enabled. The QT/DQT decoder is momentarily disabled. Multi Table No. Select Signalling changes to the Multi Table Sub. Multi Table No. Select Signalling changes to the Multi Table Main. Multi Table No. Select Signalling changes between Multi Table Sub and Multi Table Main. Disables the QT/DQT decode operation. Enables the QT/DQT decode operation. Toggles between disabling and enabling the QT/DQT decode operation. Disables the QT/DQT encode operation. Enables the QT/DQT encode operation. Toggles between disabling and enabling the QT/DQT encode operation. Disables repeater operation. Enables repeater operation. Toggles between disabling and enabling repeater operation. Resets to default condition set up by FPU. Activates DC Power Save Mode Off. Activates DC Power Save Mode On. Toggles between DC Power Save Mode On and Off.

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 Function AUX Out 1~5 (I/O 1~6) Off AUX Out 1~5 (I/O 1~6) On AUX Out 1~5 (I/O 1~6) On/Off Channel 1~16, Up/Down CW ID On CW Message 1~8 On Display Off Display On Display On/Off Hold Time Enable Hold Time Disable Hold Time Disable/Enable Local Tx Disable Local Tx Enable Local Tx Disable/Enable Monitor Off Monitor On Monitor On/Off Monitor Momentary Multi Table Sub Multi Table Main Multi Table Main/Sub QT/DQT Dec Disable QT/DQT Dec Enable QT/DQT Dec Disable/Enable QT/DQT Enc Disable QT/DQT Enc Enable QT/DQT Enc Disable/Enable Repeat Disable Repeat Enable Repeat Disable/Enable Reset DC Power Save Off DC Power Save On DC Power Save On/Off Scan Off No No Yes Yes Yes Yes No No Yes No No Yes No No Yes No No Yes Yes No No Yes No No Yes No No Yes No No Yes Yes No No Yes No PF keys AUX input Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Save on/off Yes Yes No Yes Yes Yes Yes Yes No Yes Yes No Yes Yes No Yes Yes No No Yes Yes No Yes Yes No Yes Yes No Yes Yes No No No No No Yes Yes Yes No Yes Yes Yes Yes Yes No Yes Yes No Yes Yes No Yes Yes No No Yes Yes No Yes Yes No Yes Yes No Yes Yes No No Yes Yes No Yes Start up Power supply Yes Yes No Yes Yes Yes Yes Yes No Yes Yes No Yes Yes No Yes Yes No No Yes Yes No Yes Yes No Yes Yes No Yes Yes No No Yes Yes No Yes Turns on in ON status. Do not turn on. Turns on while transmitting. Turns on while transmitting. Turns on in ON status. Turns on in Disable status. Turns on in Disable status. Turns on in ON status. Turns on in ON status. Turns on in Sub status. Turns on in Disable status. Turns on in Disable status. Turns on in Disable status. Do not turn on. Do not turn on. Condition of LED in he PF key on
Trigger Function 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 None No Yes No No Yes No No Yes Yes Yes No No Yes No No Yes No No Yes Yes PF keys AUX input Yes Yes Yes Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Save on/off Yes No Yes Yes No Yes Yes No No No Yes Yes No Yes Yes No Yes Yes No Yes Yes No Yes Yes No Yes Yes No No No Yes Yes No Yes Yes No Yes Yes No Yes Start up Power supply Yes No Yes Yes No Yes Yes No No No Yes Yes No Yes Yes No Yes Yes No Yes Turns on in ON status. Turns on in ON status. Turns on in OFF status. Turns on in OFF status. Turns on in ON status. Turns on in ON status. Turns on in Disable status. Turns on in Disable status. Do not turn on. Condition of LED in he PF key on

Firmware programming mode
Use when changing the firmware program of the flash memory.
2. How to Enter Each Mode
Mode User mode PC mode Firmware Programming mode Power on. Received commands from PC. [PF1] key + Power on (one second). Operation

20. Power Supply

The TKR-850 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.

3. PC Mode

3-1. Preface
The TKR-850 repeater is programmed by using a personal computer, programming interface and KPG-66D software.

21. Start Up

When the TKR-850 is first turned on or is reset, up to 3 functions pre-programmed into the Start Up function are executed in sequence.
3-2. Connection Procedure
1. Connect the TKR-850 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.

22. Optional Board

An optional scrambler board can be installed in the TKR850. 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.

Note :

The data stored in the personal computer must match the model type, when it is written into the flash memory. Change the TKR-850 to PC mode, then attach the interface cable.
3-3. KPG-46 Description (PC Programming Interface Cable : Option)
The KPG-46 is required to interface the TKR-850 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-850 to the computers RS-232C serial port.
4. Firmware Programming Mode

4-1. Preface

The TKR-850 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-850 to the personal computer (IBM PC or compatible) with the interface cable (KPG-46). (Connection is the same as in the PC mode.)
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-850 repeater via the programming interface cable (KPG46).

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.
3-5. Programming With IBM PC
Data can be programmed into the flash memory in RS232C format via the microphone connector.

IBM PC

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-850 power on with the [PF1] key held down. Hold the key down for one second until the 7segment display changes to P.G. When P.G. appears, release your finger from the key. 5. Check the connection between the TKR-850 and the personal computer, and make sure that the TKR-850 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-850 lights. 8. If you want to continue programming other TKR-850s, repeat steps 3 to 6.

KPG-46

KPG-66D

Fig. 1

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

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.
TX-RX unit (B/2) control section Component side

2. Voice Scrambler

It operates only during base operation. The voice is not scrambled when it is repeated.

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 : 3.9k (RK73GB1J392J) chip resistor. 3. Change R801 for Auxiliary output 1 (R797 for Auxiliary output 2) from 1k (RK73GB1J102J) to 0 (R92-125205). By making this modification, Auxiliary output 1 and 2 can now sink up to 600mA each.

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) Component side

CF1 WIDE

CF2 NARROW
TX-RX unit (B/2) Component side

R756 $Q607

R770 $Q611 $R769 R769 C681 CN605

$R759 R755

$Q608 $Q612
5V Add $R761 ($R759) 3.9k Remove D625 (D624) DA204U Add $Q608 ($Q607) DTD114EKA Remove R755 (R756) 0 Add $Q612 ($Q611) DTD114EKA Remove R769 (R770) 0 TEST/ SPKR 5V

Shift register IC623

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. You can also flip the top plate upside-down to adjust a height of the cabinet space.
Tighten screws Cushion (G13-1801-04 or G13-1802-04) Hardware fixture
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.

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 (X57-627 A/2).
Display unit (X54 B/2) MIC JACK Display unit (X54 A/2) VR501 IC501(A/2) AMP Q501,502 ATT MI

J601 DET D501,502

TXRX unit (X57 B/2): CONTROL IC605 (A/2) MIC MIS TA SW SW TXI TXO D-SUB TD TDS IC610 AMP AINL IC614 CODEC IC AOUTL IC605 (B/2) SW IC616 (B/2) AMP IC616 (A/2) LPF IC611 (A/2) AMP DAC MB IC615 MO

Microphone circuit

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 (X45-363). This amplified signal is amplified by Q1, Q2, Q3, and Q4, and is passed to the FINAL stage. The RF power amplifier consists of MOS FET.
TX-RX unit (X57-627 A/2) STT Q11 MO TX VCO A2 (X58-481) ATT TEMP Q2 Drive AMP IC3 FCT MB BUFF IC1 TCXO X3 16.8MHz Vcont D4 DC AMP SW Q8 POWER ADJ PC REF AMP IC3 REF DET FWD DET D5 Final unit (X45-363 A/2) TX ANT Q1 Drive AMP Q3 Q4 Q5 Drive AMP Drive AMP Final AMP CM COUPLER
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 IC3 (A/2). The voltage comparator (IC3 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 IC3. This output voltage controls the gate voltage for the drive amplifier Q4 and final amplifier Q5, which keeps the transmitter output power constant.
FAN CN4 FAB FAG X45 A/2 +B Q9 FAS 13 Q6 CK, DT, STB IC1 TK11050M 6 OUT CPU TEMP 17 X57 A/2 IC7 BU4094BCF X57 B/2

VTH Q602

[Fan operation]
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. 40C, the output from pin 6 of the temperature detection IC1 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. 5C by IC2. If fan action is set to Continuous, the fan operates continuously, but Q9 stays ON.

Main DC D8 D9 R61 Land Backup battery 120mA K1 (Relay) Final unit (A/2) TX-RX unit (A/2) TX-RX unit (B/2) R54 +B

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.

BUP IC604 CPU

Fig. 9
DC source switching relay circuit
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.

K1 +B R165 D12 R166 SB

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.

Q25 Q24

Land (PSW)
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.
Display unit (Front panel)

Fig. 10

SB switching relay circuit

SEMICONDUCTOR DATA

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

s Pin Function

Pin No. 1~Name IO5~IO1 BYTE CNVss ENT ENR Reset Xout Vss Xin Vcc NMI BUP I/O I/O O O I I Function Aux I/O No.5~No.1 (Acc D-sub 25 pin) 5V GND TX PLL IC enable RX PLL IC enable Microcomputer reset input 14.7456MHz GND 14.7456MHz 5V Not used Backup battery detect H : Backup, L : Main 17 TEMP I Temperature detect for fan action H : Temp high, L : Temp low 18 EPTT I Acc PTT (Acc D-sub 25 pin) H : Off, L : On 27 CLK DAT SFT LD1 STB3 LD2 STB4 RS SC O O O O O O O O O Common clock Common data Beat shift H : On, L : Off 73 LDT I 72 LDR I Pin No. 50~63~Name HLDA BCLK RD BHE WR STB2 INTx HCS CS0 A19 A18~A9 Vcc A8 Vss A7~A0 EMON I/O O O O O O O O O O O O I Not used Not used Flash ROM WR/DSP HDS1 Not used Flash ROM WR/DSP HDS2 Control shift register STB DSP interrupt DSP HCS Flash ROM CS Not used Flash ROM address bus 5V Flash ROM address bus GND Flash ROM address bus Acc monitor (Acc D-sub 25 pin) H : Off, L : On RX VCO lock detect H : Lock, L : Unlock TX VCO lock detect H : Lock, L : Unlock 74,75 76~78 79~100 KEY5,KEY4 KEY3~KEY1 D7~D0 FWD RSSI ASQ VLI BATT AI1 AI2 AVss AI3 Vref AVcc STB1 SOE IO6 O I I/O I I I I I I I I O O I/O Key matrix output Key matrix input Flash ROM data bus RF power down level input RSSI level input Squelch level input Volume level input Power supply voltage level input Aux input No.1 (Acc D-sub 25 pin) Aux input No.2 (Acc D-sub 25 pin) GND Aux input No.3 (Acc D-sub 25 pin) 5V 5V Display shift register STB Shift register common OE Aux I/O No.6 (Acc D-sub 25 pin) H : Off, L : On Function

2B 1B 1B 1D 3A 3C 1F 1F 1F 2C,3D 2C,3D 2C,3D 2C,3D 2C 1C 2C 1E 1E A10-4037-11 A62-0836-04 A62-0837-04 A62-0840-03 A62-0933-13 A62-0934-03 B10-2635-04 B10-2636-04 B11-1259-04 B62-1327-10 B72-1935-04 B72-1936-04 B72-1937-04 B72-1975-14 E30-3414-05 E30-3418-05 E30-3419-05 E30-3427-15 E31-3228-05 E37-0808-05 E37-0902-05 E37-0903-05 E37-0904-05 E37-0905-05 E37-0906-05 E37-0908-05 E37-0909-05 E37-0911-05 E37-0912-05 E37-0913-05 E37-0934-05 E37-0964-05 E37-0965-05 E37-0967-05 E70-0402-05 F05-1537-05 F09-0445-05 F09-0471-05 F10-2374-04 F10-2379-04 F10-2409-04 F20-3322-04 G02-0576-14 G02-0829-14 G02-0885-13 G10-1263-04 G10-1264-04 G13-1801-04 G13-1802-04 G13-1886-04 H25-0029-04 CHASSIS PANEL PANEL PANEL PANEL ASSY PANEL ASSY FRONT GLASS F-KEY FRONT GLASS PC SHEET FILTER F-KEY INSTRUCTION MANUAL MODEL NAME PLATE MODEL NAME PLATE MODEL NAME PLATE MODEL NAME PLATE DC CORD ANTENNA CABLE (BNC) ANTENNA CABLE (N) DC CORD (ACC) LEAD WIRE WITH CONNECTOR LEAD WIRE WITH CONNECTOR LEAD WIRE WITH TERMINAL (DC+) LEAD WIRE WITH TERMINAL (DC-) LEAD WIRE WITH CONNECTOR (D-SUB) LEAD WIRE WITH CONNECTOR (SP) LEAD WIRE WITH CONNECTOR (CONT-DISP) LEAD WIRE WITH CONNECTOR (11P) LEAD WIRE WITH CONNECTOR (8P) LEAD WIRE WITH CONNECTOR (3P) LEAD WIRE WITH MINIPIN PLUG LEAD WIRE WITH CONNECTOR (15P) LEAD WIRE WITH TERMINAL (ORANGE) LEAD WIRE WITH TERMINAL (BLACK) LEAD WIRE WITH TERMINAL (RED) FLAT CABLE (36P) TERMINAL BOARD FUSE (BLADE) 15A/32V CAP (D-SUB) FANMOTOR SHIELDING PLATE (TX-RX) SHIELDING CASE (TX-RX COM) SHIELDING CASE (TX-RX FOIL) INSULATING SHEET FLAT SPRING FLAT SPRING EARTH SPRING FIBROUS SHEET (CHASSIS) FIBROUS SHEET (PANEL) CUSHION (ACC) CUSHION (ACC) CUSHION PROTECTION BAG (60/110/0.07) ADC12 TX-RX FINAL OUTER
1B 1B 2C 3B 3A 3A 1B 1B 1B 2C 1B

FINAL UNIT (X45-3630-XX) -10 : K,E -11 : K2 -12 : K3
C1 C3 C4,5 C6,7 C8 C8 C9 C10 C12-15 C16 C17 C17 C17 C18,19 C20 C21 C21 C22 C22 C23 C24 CC73GCH1H100D C90-2146-05 CK73FB1E104K CK73GB1H471K CC73GCH1H030C CC73GCH1H100D CK73FB1E104K CK73GB1H471K CK73GB1H471K CK73FB1E104K CC73GCH1H270J CC73GCH1H390J CC73GCH1H560J CK73GB1H471K CK73FB1H471K CC73FCH1H120J CC73FCH1H220J CC73FCH1H090D CC73FCH1H120J CK73FB1H471K C90-4016-05 CHIP C ELECTRO CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C ELECTRO 10PF 100UF 0.10UF 470PF 3.0PF 10PF 0.10UF 470PF 470PF 0.10UF 27PF 39PF 56PF 470PF 470PF 12PF 22PF 9.0PF 12PF 470PF 47UF D 25WV K K C D K K K K J J J K K J J D J K 16WV

1/16W 1/10W 1/10W

1/16W 1/16W 1/16W

J J J J J J J J J

1W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W
PIN ASSY PIN ASSY PIN ASSY MODULAR JACK COLLAR (LH-5-1.5) CHIP-COM CHIP R CHIP R CHIP R CHIP R OHM 68K 10K 6.8K J J J J 1/16W 1/16W 1/16W 1/16W
SEMI FIXED VARIABLE RESISTOR VARIABLE RESISTOR TACT SWITCH PUSH SWITCH DIODE LED DIODE DIODE VARISTOR MOS IC MOS IC MOS IC TRANSISTOR
DISPLAY UNIT (X54-3330-20)
D503-505 C501 B30-2151-05 C92-0628-05 LED (RED/GREEN) CHIP-TAN 10UF 10WV
DISPLAY UNIT (X54-3330-20) TX-RX UNIT (X57-6270-XX) Ref. No. Q502 Q504 Q506 Q507 Q508 Q510,511 Q512-514 Q516-519 Q521-524 Q525 New Address parts Parts No. 2SA1586(Y,GR) UPA672T DTA114EUA UPA672T DTA114EUA DTA114EUA UPA672T UPA672T UPA672T 2SK1824 Description TRANSISTOR FET DIGITAL TRANSISTOR FET DIGITAL TRANSISTOR DIGITAL TRANSISTOR FET FET FET FET Destination Ref. No. C66,67 C68-70 C71 C72 C73 C73,74 C74 C75 C75 C76 C77 C78 C78 C79 C79 C80,81 C82-84 C85 C86 C87 C88 C89,90 C91 C91 C92,93 C94 C94,95 C95 C95 C96-99 C100 C100,101 C101 C102 C104 C105 C106 C107 C109 C111 C114-117 C120,121 C122,123 C124,125 C126,127 C128,129 C130,131 C132,133 C134,135 C136-139 C140,141 C142,143 C144 C145 C146 C147 C148 C149 C150 C151 New Address parts Parts No. CC73GCH1H331J CK73GB1C104K CK73GB1H103K C92-0628-05 CK73GB1C104K CK73GB1H102K CK73GB1H102K CK73GB1C104K CK73GB1C223K C92-0628-05 CK73GB1H102K CK73GB1C104K CK73GB1C223K CK73FB1C224K CK73FB1C334K C92-0628-05 CK73GB1H103K C92-0628-05 CK73GB1H102K C92-0628-05 CK73GB1H102K CK73GB1H103J CC73GCH1H040C CC73GCH1H050C CK73GB1H471K CC73GCH1H030C CC73GCH1H040C CC73GCH1H040C CC73GCH1H060D CK73GB1H471K CC73GCH1H060D CC73GCH1H050C CC73GCH1H050C CK73GB1H471K CK73GB1H471K CC73GCH1H070D CK73GB1H471K CC73GCH1H060D CC73GCH1H120J CC73GCH1H060D CC73GCH1H100D CK73GB1H471K CK73GB1H103K C92-1341-05 C92-0633-05 CK73GB1H103K CK73GB1H102K CK73GB1H471K CK73GB1H103K C90-4016-05 CK73GB1H103K CK73GB1H102K CK73GB1H471K C92-0606-05 CK73GB1H471K C92-0633-05 CK73GB1H102K CK73GB1H103K C92-0633-05 C92-0008-05 CHIP C CHIP C CHIP C CHIP-TAN CHIP C CHIP C CHIP C CHIP C CHIP C CHIP-TAN CHIP C CHIP C CHIP C CHIP C CHIP C CHIP-TAN CHIP C CHIP-TAN CHIP C CHIP-TAN CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C ELECTRO CHIP-TAN CHIP C CHIP C CHIP C CHIP C ELECTRO CHIP C CHIP C CHIP C CHIP-TAN CHIP C CHIP-TAN CHIP C CHIP C CHIP-TAN CHIP-TAN Description 330PF 0.10UF 0.010UF 10UF 0.10UF 1000PF 1000PF 0.10UF 0.022UF 10UF 1000PF 0.10UF 0.022UF 0.22UF 0.33UF 10UF 0.010UF 10UF 1000PF 10UF 1000PF 0.010UF 4.0PF 5.0PF 470PF 3.0PF 4.0PF 4.0PF 6.0PF 470PF 6.0PF 5.0PF 5.0PF 470PF 470PF 7.0PF 470PF 6.0PF 12PF 6.0PF 10PF 470PF 0.010UF 100UF 22UF 0.010UF 1000PF 470PF 0.010UF 47UF 0.010UF 1000PF 470PF 4.7UF 470PF 22UF 1000PF 0.010UF 22UF 3.3UF J K K 10WV K K K K K 10WV K K K K K 10WV K 10WV K 10WV K J C C K C C C D K D C C K K D K D J D D K K 16WV 10WV K K K K 16WV K K K 10WV K 10WV K K 10WV 16WV Destination K3

MOD ANA Rear or Deviation meter Oscilloscope

A (Narrow)

22. QT deviation (Wide)
PC adj. 0.35kHz PC adj. 0.75kHz

0.05kHz 0.05kHz

23. DQT deviation (Wide)
PC adj. 0.35kHz PC adj. 2kHz

0.05kHz 0.1kHz

24. CW ID deviation (Wide)
PC adj. 1kHz PC adj. 3kHz
25. Test tone deviation (Wide)

PC adj. 1.5kHz

0.05kHz
Measurement Item 26. TA (TX audio input) deviation (Wide) Condition 1) Insert AG output into the control I/O TA terminal (pin 9). CH : 2 Deviation meter filter HPF : OFF LPF : 15kHz De-emphasis : OFF AG freq : 1kHz (Sine wave) AG level : 280mV Transmission 2) CH : 2 Transmission 1) Insert AG output into the control I/O TD terminal (pin 8). CH : 2 Deviation meter filter HPF : OFF LPF : 3kHz De-emphasis : OFF AG freq : 100Hz (Sine wave) AG level : 0.5Vp-p (177mVrms) Transmission 2) CH : 2 Transmission 1) CH : 2 SSG output : 53dBm SSG MOD : 1kHz SSG DEV : 1kHz Deviation meter filter HPF : OFF LPF : 15kHz De-emphasis : OFF Transmission 1) CH : 2 Transmission SSG MOD ANA or Deviation meter Oscilloscope Rear RX ANT TX ANT MOD ANA Rear or Deviation meter Oscilloscope AG AF VTVM TX ANT Testequipment Unit Terminal TX ANT Unit Adjustment Parts Method PC adj. 3.0kHz Specifications/Remarks 0.1kHz
MOD ANA Rear or Deviation meter Oscilloscope AG AF VTVM
CONTROL I/O jack TA (pin 9)
PC adj. 1.5kHz PC adj. 0.75kHz

27. TD deviation (Wide)

CONTROL I/O jack TD (pin 8)
PC adj. 0.35kHz PC adj. 1kHz
28. Repeat gain level (Wide)
ATTEN 20dB RL 10.0dBm 10dB/ MKR 26.17dBm 465.00MHz ATTEN 10dB RL 32.0dBm 10dB/ MKR 42.17dB 25.00kHz ATTEN 10dB RL 32.0dBm 10dB/ MKR 46.000dB 15.00kHz
More than More than 3dB Max. 3.75kHz 3.75kHz
MKR 465.00MHz 26.17dBm 3dB Max. 5.5~7.5kHz 5.5~7.5kHz

MKR D 25.00kHz 42.17dB

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

More than 40dB

MKR 15.00kHz 46.000dB

CENTER RBW 300kHz

*VBW 300kHz

SPAN 50.00MHz SWP 50ms

CENTER 44.85000MHz RBW 300Hz *VBW 1.0kHz

SPAN 50.00kHz SWP 2.0sec

Adjustment Points
FINAL UNIT (X45-363) (A/2) Component side view

CN8 GND (BLACK)

CN6 MAIN DC (RED)

CN7 BACKUP (ORANGE)

CN1 TX IN CN5 VR1 CN3

CN2 RX

L2 CN18

CN16 TP102 TX CV

CN19 TC350 (VCO A) (K,K2,E TYPE) A2 : TX VCO (X58-481) TC351 (VCO B) (K3 TYPE)

L16 NARROW

CN4 L24 L18
WIDE L17 L14 CN3 TC350 (VCO A) A3 : RX VCO (X58-480)
TX-RX UNIT (X57-627) (A/2) Component side view

RECEIVER (Measured by TIA/EIA-603)
Sensitivity 12dB SINAD.. 0.35V 20dB Quieting.. 0.45V Selectivity.. Wide : 83dB ( 25kHz) Hum and Noise.. Wide : 50dB Spurious & Image Rejection.. 90dB Audio Output (Ext. Speaker).. 4W at 4 less than 5% distortion Audio Distortion (Ext. Speaker).. Less than 2.5% at 1000Hz Band Spread.. K,K2 : 5MHz K3 : 3MHz Narrow : 75dB (12.5kHz) Narrow : 75dB ( 12.5kHz/25kHz) Intermodulation.. Wide : 78dB ( 25kHz/ 50kHz) Narrow : 45dB
TRANSMITTER (Measured by TIA/EIA-603)
RF Power Output.. 40W adjustable to 25W (100% duty @25W) Type of Emission.. Wide : 16K0F3E Spurious Response.. Harmonics : 80dB FM Hum and Noise.. Wide : 50dB Microphone Impedance.. 600 Band Spread.. K : 30MHz K2 : 32MHz K3 : 30MHz Narrow : 11K0F3E Others : 75dB Narrow : 45dB
Audio Distortion.. Less than 3% at 1000Hz

SPECIFICATIONS (E TYPE)

Frequency Range.. Number of Channels.. Channel Spacing... Operating Voltage.. Current Drain Standby... Standby w/power save.. Receive... Transmit/Receive. Duty Cycle.. Frequency Stability.. Antenna Impedance.. Operating Temperature Range. Dimensions.. Weight... 440 to 470MHz 16 channel Wide : 25kHz 13.2V DC
Narrow : 12.5kHz (PLL channel stepping 5kHz/6.25kHz)
0.8A 0.3A (Operating mode DC-IN : Backup, FAN : Temp, SAVE : ON, DISP : OFF) 1.2A Less than 13A Receive : 100% Transmit : 100% (100% @25W) Less than 0.00015% 30C to +60C 50 30C to +60C 483 W x 88 H x 340 D mm 9.7kg
RECEIVER (Measured by ETS 300 086)
Sensitivity... Adjucent Channel Selectivity. Intermodulation.. Spurious & Image Rejection.. Audio Output (Ext. Speaker).. Audio Distortion (Ext. Speaker). Band Spread.. 0.45V 83dB (25kHz) 75dB (12.5kHz) 72dB 90dB 4W at 4 less than 5% distortion Less than 2.5% at 1000Hz 5MHz
TRANSMITTER (Measured by ETS 300 086)
RF Power Output.. Modulation Limiting. Spurious Emission.. FM Noise (EIA).. Modulation Distortion.. Microphone Impedance.. Band Spread.. 40W adjustable to 25W (100% duty @25W) 5kHz at 25kHz 2.5kHz at 12.5kHz 36dBm 1GHz 30dBm > 1GHz 25kHz : 50dB 12.5kHz : 45dB Less than 3% at 1000Hz 600 30MHz

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
Rembrcker 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/Milano, Italy

KENWOOD IBERICA S.A.

Bolivia, 239-08020 Barcelona, Spain
KENWOOD ELECTRONICS AUSTRALIA PTY. LTD.
(A.C.N. 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

VHF FM REPEATER/ UHF FM REPEATER

TKR-750/ TKR-850

INSTRUCTION MANUAL

THANK YOU!

We are grateful you purchased this KENWOOD repeater. We believe this easy-to-program repeater will be highly effective in your communications system, and will keep personnel operating at peak efficiency. KENWOOD incorporates the latest in advanced technology into all of our products. As a result, we feel strongly that you will be pleased with the quality and features of this product.

FCC WARNING

KENWOOD CORPORATION

B62-1327-20 (K,E) 03 02

NOTICES TO THE USER
This equipment generates or uses radio frequency energy. Changes or modifications to this equipment may cause harmful interference unless the modifications are expressly approved in the instruction manual. The user could lose the authority to operate this equipment if an unauthorized change or modification is made.

FEATURES

You can easily program channel data using the KPG-66D software on a PC. You can recall 1 of 16 preset channels using either a PF key or the external control line. The firmware can be written to the Flash memory through an external source. QT/DQT signalling can be programmed on each channel. It simultaneously decodes up to 16 different QT/DQT tones. The interface port can be used with external equipment, such as a repeater controller. The repeater has multi-mode capability.
Wide: 30 kHz/ Wide: 25 kHz/ Narrow: 15 kHz Narrow: 12.5 kHz (TKR-750; K type only) (TKR-750/ TKR-850)
GOVERNMENT LAW PROHIBITS THE OPERATION OF UNLICENSED RADIO TRANSMITTERS WITHIN THE TERRITORIES UNDER GOVERNMENT CONTROL. ILLEGAL OPERATION IS PUNISHABLE BY FINE OR IMPRISONMENT OR BOTH. REFER SERVICE TO QUALIFIED TECHNICIANS ONLY.
UNPACKING AND CHECKING EQUIPMENT
Note: The following unpacking information is for use by your KENWOOD dealer, an authorized KENWOOD service facility, or the factory.
Carefully unpack the repeater. We recommend that you identify the items listed in the following table before discarding the packing material. If any items are missing or have been damaged during shipment, file a claim with the carrier immediately.
Item Hardware fixture Front glass Filter Cushion Cushion Foot Foot Grommet Handle Screws DC cord Connector cable Fuse Warranty card (K type only) Instruction manual Part Number Quantity J21-8402-XB10-2635-XB11-1259-XG13-1801-XG13-1802-XJ02-0475-XJ02-0492-XJ59-0302-XK01-0418-XN35-3006-E30-3427-XE31-3228-XF05-1537-X1 B62-1327-XX 1
You can adjust the following functions from a PC:
Squelch RX audio signal output (RA) RX detector signal output (RD) RX frequency RF output power Maximum deviation TX audio input (TA) Signalling deviation (TD) DQT balance QT deviation DQT deviation Test tone deviation CW ID deviation Repeat gain TX frequency

PRECAUTIONS

Do not expose the unit to rain or moisture; to prevent fire or electric shock. Do not open the unit under any circumstances; to avoid risk of electric shock. Do not expose the unit to long periods of direct sunlight, nor place it close to heating appliances. Do not place the unit in excessively dusty and/or humid areas, nor on unstable surfaces. If you detect an abnormal odor or smoke coming from the unit, disconnect the power from the unit immediately. Contact your KENWOOD service center or dealer.

INSTALLATION

To install the handles onto the front panel of the repeater, align the handles with the holes on the front panel, then secure the handles using the supplied screws. Please consult your dealer for installing the repeater and antenna.

MICROPHONE

Connect an optional KMC-30 (E type only), KMC-27A, KMC-27B, or KMC-9C KENWOOD microphone to the MIC jack on the front panel.

CONTROLS AND FUNCTIONS

Front Panel q w e r t
q Speaker w CH/STATUS Display Two, 7-segment digits display the channel number or status. e VOLUME control Rotate to adjust the volume. r DC SOURCE switch t Power indicator Lights green when power is applied from the DC 13.6V jack (DC 13.2V jack on E type versions). Lights red when power is applied from the BACK UP battery terminal. Rear Panel q w e r

o iu y y MIC jack Connect a microphone to this 8-pin modular jack. u Programmable Function keys Press these keys to activate their programmable functions. i BUSY indicator Lights green while a signal is being received. o TX indicator Lights red while transmitting.
* The K type model is shown in this diagram.
u yt q TX OUT jack Connect a TX antenna or a duplexer to this receptacle. w CONTROL I/O jack Connect an external programming device or repeater controller to this DB-25 interface. e FUSE Insert 15 A blade fuses into these fuse holders.
r RX IN jack Connect a RX antenna or a duplexer to this BNC receptacle. t 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. y BACKUP battery terminal u TEST/SPKR jack Test input/output jack. Connect an external speaker to this jack.

REPEATER OPERATION

Note: Please consult your dealer for programming the repeater.

TRANSCEIVER OPERATION

Receive Adjust the volume to your desired level. You may need to readjust the volume when you receive a message from your dispatcher or another member in your fleet. The BUSY indicator lights green while a signal is being received. Transmit 1 Listen to the channel before transmitting, to make sure it is not being used. 2 Press the microphone PTT switch, then speak in your normal speaking voice. FCC regulations require that you identify the station you are calling as well as your own station (your assigned call sign). The TX indicator lights red while transmitting. 3 When you finish speaking, release the PTT switch.
When power is applied to the unit, the Power indicator lights: Green when using the main DC jack. Red when using the Backup terminal.
Rotate the VOLUME control to adjust the volume. The BUSY indicator lights green while receiving a signal and the TX indicator lights red while transmitting.