Kenwood TKR-850 Service Manual
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Kenwood TKR-850 Service Manual

Uhf fm repeater
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See also: Service Manual , Instruction Manual
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.
Panel (Outer)
(A62-0840-03)
Panel assy
(A62-0934-03)
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
PARTS LIST ............................................. 28
EXPLODED VIEW .................................... 39
PACKING ................................................. 41
ADJUSTMENT ........................................ 42
Key top
(K29-5460-02)
CONTENTS
TERMINAL FUNCTION ........................... 49
WIRING.................................................... 53
RX PLL/VCO (X58-4800-XX) .............. 55
TX PLL/VCO (X58-4810-XX) ............... 56
FINAL UNIT (X45-3630-XX) ................ 61
SCHEMATIC DIAGRAM.......................... 79
BLOCK DIAGRAM ................................... 91
KES-4 (EXTERNAL SPEAKER) ............... 94
SPECIFICATIONS .................................... 95
© 2001-5 PRINTED IN JAPAN
B51-8557-10 ( N ) 1233
Knob (DC source)
(K29-9106-04)
Knob (VOL)
(K29-5389-03)
Modular jack
(E08-0877-05)

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  • Page 1: Table Of Contents

    UHF FM REPEATER TKR-850 SERVICE MANUAL REVISED © 2001-5 PRINTED IN JAPAN B51-8557-10 ( N ) 1233 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.

  • Page 2: General

    TKR-850 GENERAL / SYSTEM SET-UP INTRODUCTION PERSONNEL SAFETY SCOPE OF THIS MANUAL The following precautions are recommended for person- nel safety : This manual is intended for use by experienced techni- • DO NOT transmit until all RF connectors are secure and cians familiar with similar types of commercial grade com- any open connectors are properly terminated.

  • Page 3: Operating Features

    TKR-850 OPERATING FEATURES 1. Controls and Functions 1-1. Front Panel 1 Speaker 7 Programmable Function keys Press these keys to activate their programmable func- 2 CH/STATUS Display tions. Two, 7-segment digits display the channel number or sta- tus. PF1 key (left side)

  • Page 4: Operating Features

    TKR-850 OPERATING FEATURES 2. Two 7-segment LED Displays • “E2” is displayed when the channel data is not written. • Channel display (1~16) : While operating normally in user mode. • “E3” is displayed when PLL is unlocked. Receiver PLL unlocked = flashing BUSY LED.
  • Page 5 TKR-850 OPERATING FEATURES 3. Programmable Functions TKR-850 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.
  • Page 6 TX Disable/Enable Toggles between transmitter inhibited and transmitter enabled (normal). The following Programmable Functions are output functions used to tell the condition of the TKR-850 to an external device. The output functions can be assigned to only AUX Outputs as follows.
  • Page 7 TKR-850 OPERATING FEATURES 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.
  • Page 8 Turns on in Disable status. None Do not turn on. The Multi Table function enables the TKR-850 to decode 5. Simplex/Duplex Operation any one of the 16 QT/DQTs pre-programmed into the Multi The Simplex/Duplex function is used to specify whether Table.
  • Page 9 ADD channels is done in ascending order. audio. The TKR-850 can select the time between 140 to 200 2) Single Priority Scan : The Priority channel is set as either ms that the QT reverse burst is sent.

  • Page 10: Test Tone

    15. RF Power to the Receive Audio (RA) port and a speaker if the Send CW ID to RA function is set to Yes. The TKR-850 contains 8 The TKR-850 is able to switch transmission output on a message banks for CW Message. CW Message 1 to 8 is per-channel basis.

  • Page 11: Realignment

    The TKR-850 repeater is programmed by using a personal 21. Start Up computer, programming interface and KPG-66D software. When the TKR-850 is first turned on or is reset, up to 3 3-2. Connection Procedure functions pre-programmed into the Start Up function are 1.
  • Page 12 4-1. Preface The KPG-46 is required to interface the TKR-850 to the The TKR-850 uses flash memory to allow it to be easily computer. It has a circuit in its D-sub connector (25-pin) upgraded when new features are released in the future.

  • Page 13: Installation

    TKR-850 INSTALLATION 1. External Power Supply Connection TX-RX unit (B/2) control section (Rear Connectors) : See Page 3 Component side This unit has two external power supply connectors : Main DC and Backup. If an external DC power supply is connected to the main...
  • Page 14 TKR-850 INSTALLATION 3. External Speaker (KES-4) The TKR-850 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-850 When taking the AF output from the TEST/ Fig.

  • Page 15: Modification

    TKR-850 MODIFICATION 1. Modification for Sinking the Collector Current Up 2. DC Source Switch Auxiliary output 1 and 2 can each be modified to sink up To prevent the power supply from turning off due to 600mA of the collector current. The following modification...
  • Page 16 TKR-850 MODIFICATION You can also flip the top plate upside-down to adjust a 3. Trickle Charge for Backup Battery height of the cabinet space. If the external DC power supply is connected to the Main DC connector and a backup battery (12V rechargeable type)

  • Page 17: Disassembly For Repair

    TKR-850 MODIFICATION / DISASSEMBLY FOR REPAIR 6. Desktop Repeater DISASSEMBLY FOR REPAIR When you use the repeater on the desktop, attach the 4 spacers to the base of the repeater as shown in figure. With 1. How to Remove the Panel Assy (ABS)

  • Page 18: Circuit Description

    5.0MHz, 400 to 430MHz with a pass band of 1. Outline 3.0MHz (K3). The TKR-850 is a UHF/FM repeater designed to operate The BPF L4/L5 attenuates the unwanted signals, and in the frequency range of 440 to 470MHz (E), 450 to sends only the necessary signal to the first mixer DBM A1.
  • Page 19 TKR-850 CIRCUIT DESCRIPTION 2-4. Audio Amplifier 3. Transmitter Circuit The audio amplifier circuit is located in control section of The transmitter circuit consists of the following circuits : TX-RX unit (X57-627 B/2). The recovered audio signal ob- 3-1 microphone circuit, 3-2 modulation level adjustment cir-...
  • Page 20 TKR-850 CIRCUIT DESCRIPTION 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 am- plified signal is amplified by Q1, Q2, Q3, and Q4, and is passed to the FINAL stage.
  • Page 21 TKR-850 CIRCUIT DESCRIPTION 4-2. Transmitter PLL 4. PLL Frequency Synthesizer The transmitter PLL circuit is located in VCO unit A2 (X58- The PLL frequency synthesizer circuit consists of the fol- 481) on TX-RX unit (X57-627 A/2), and consists of VCXO X3, lowing circuits : 4-1 receiver PLL circuit, 4-2 transmitter PLL VCO’s (Q350;...
  • Page 22 TKR-850 CIRCUIT DESCRIPTION 5-5. Display Circuit 5. Control Circuit The display circuit (X54-333) contains two 7-segment The control circuit mainly located in the control section of LEDs D506, D507 (orange : see the operation manual for TX-RX unit (X57-627 B/2) consists of the following : 5-1 CPU,...
  • Page 23 TKR-850 CIRCUIT DESCRIPTION 5-6. DSP 6. DC Power Supply Circuit The DSP circuit filters transmit/receive audio signal and 6-1. DC Source Switching Relay Circuit encode/decodes signaling (QT, DQT). This circuit consists 1. The final unit contains a relay (K1) for switching between of IC618, IC612, IC613, IC614, IC603, IC606, IC608, IC610, the Main DC and Backup Battery.

  • Page 24: Semiconductor Data

    TKR-850 SEMICONDUCTOR DATA Main CPU : 30622M4-113GP (TX-RX unit IC604) Pin Function Pin No. Name Function Pin No. Name Function IO5~IO1 Aux I/O No.5~No.1 (Acc D-sub 25 pin) HLDA – Not used BYTE – BCLK Not used CNVss – Flash ROM WR/DSP HDS1 TX PLL IC enable –...
  • Page 25 TKR-850 SEMICONDUCTOR DATA DSP : 320VC5402PGE (TX-RX unit IC618) Pin Function Pin No. Name Function Pin No. Name Function NC1,NC2 – Not used (No connection) BFSR1 Frame sync. for receiver input – (LRCK : 16.128kHz) DVDD – VDD for I/O pins (+3.3V)
  • Page 26 TKR-850 SEMICONDUCTOR DATA / DESCRIPTION OF COMPONENTS Final Unit (X45-3630-XX) Pin No. Name Function NC13 – Not used (No connection) Ref No. Part name Description HPI data bus Thermostat TOUT0 – Not used (No connection) Voltage regulator EMU0 Emulator 0 (to JTAG connector)

  • Page 27: Description Of Components

    TKR-850 DESCRIPTION OF COMPONENTS TX-RX Unit (X57-6270-XX) Ref No. Part name Description Ref No. Part name Description Q601 Transistor DC switch IC1,2 Buffer amplifier Q602 DC switch IC3~5 Voltage regulator Q603 Transistor Inverter D/A converter Q604 DC switch Shift register...

  • Page 28: Parts List

    TKR-850 PARTS LIST New Parts. indicates safety critical components. L : Scandinavia K : USA P : Canada Parts without Parts No. are not supplied. Y : PX (Far East, Hawaii) T : England E : Europe Les articles non mentionnes dans le Parts No. ne sont pas fournis.
  • Page 29 TKR-850 PARTS LIST FINAL UNIT (X45-3630-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation CK73FB1E104K CHIP C 0.10UF CK73FB1E104K CHIP C 0.10UF CC73GCH1H101J CHIP C 100PF C100-102 CK73GB1H471K CHIP C...
  • Page 30 TKR-850 PARTS LIST FINAL UNIT (X45-3630-XX) DISPLAY UNIT (X54-3330-20) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation RK73FB2A563J CHIP R 1/10W C502,503 C92-0501-05 CHIP-TAN 1.5UF 10WV RK73GB1J101J CHIP R 1/16W...
  • Page 31 TKR-850 PARTS LIST DISPLAY UNIT (X54-3330-20) TX-RX UNIT (X57-6270-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation Q502 2SA1586(Y,GR) TRANSISTOR C66,67 CC73GCH1H331J CHIP C 330PF Q504 UPA672T C68-70 CK73GB1C104K CHIP C 0.10UF...
  • Page 32 TKR-850 PARTS LIST TX-RX UNIT (X57-6270-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C152 CK73GB1H103K CHIP C 0.010UF C657 CK73GB1E103K CHIP C 0.010UF C153 CK73GB1H471K CHIP C 470PF C662...
  • Page 33 TKR-850 PARTS LIST TX-RX UNIT (X57-6270-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C772 C92-0633-05 CHIP-TAN 22UF 10WV L79-1782-05 HELICAL BLOCK C773 C92-0514-05 CHIP-TAN 2.2UF 10WV L40-1575-34 SMALL FIXED INDUCTOR (15NH)
  • Page 34 TKR-850 PARTS LIST TX-RX UNIT (X57-6270-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation RK73GB1J102J CHIP R 1.0K 1/16W R77,78 RK73GB1J473J CHIP R 1/16W RK73GB1J101J CHIP R 1/16W RK73GB1J104J CHIP R...
  • Page 35 TKR-850 PARTS LIST TX-RX UNIT (X57-6270-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation R601 R92-0670-05 CHIP R 0 OHM R707-709 RK73GB1J223J CHIP R 1/16W R602 RK73GB1J472J CHIP R 4.7K...
  • Page 36 TKR-850 PARTS LIST TX-RX UNIT (X57-6270-XX) RX PLL/VCO (X58-4800-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation R788 RK73GB1J473J CHIP R 1/16W IC607 NJM4558E MOS IC R789 RK73GB1J102J CHIP R 1.0K...
  • Page 37 TKR-850 PARTS LIST RX PLL/VCO (X58-4800-XX) TX PLL/VCO (X58-4810-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C312 CC73GCH1H060D CHIP C 6.0PF R300 RK73GB1J100J CHIP R 1/16W C312 CC73GCH1H070D CHIP C 7.0PF...
  • Page 38 TKR-850 PARTS LIST TX PLL/VCO (X58-4810-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C319 CK73GB1H471K CHIP C 470PF L361 L40-1595-34 SMALL FIXED INDUCTOR (1.5UH) C320 C92-0514-05 CHIP-TAN 2.2UF 10WV...

  • Page 39: Exploded View

    TKR-850 TKR-850 EXPLODED VIEW : N09-2292-05 ø3 (FW) : N15-1030-46 M2.6 x 6 : N30-2606-46 D M4 x 6 : N30-4006-46 Mx14 M4 x 14 : N30-4014-46 M4 x 20 BLK : N30-4020-45 G M3 x 6 (F) : N32-3006-46...

  • Page 40: Packing

    TKR-850 PACKING 53 Protection bag (H25-0029-04) 49 Cushion (G13-1801-04) 59 Foot (J02-0475-05) x 2 50 Cushion (G13-1802-04) 60 Foot (J02-0492-04) x 2 54 Protetion bag (H25-0747-04) 62 Grommet (J59-0302-05) x 2 61 Hardware fixture (J21-8402-04) D Binding head machine screw (N30-4006-46) x 2...
  • Page 41 479.90 480.00 469.90 470.00 511.90 512.00 429.90 430.00 B/2 (CN602) while in servicing, you can use the 36-pin flat 455.10 455.00 445.10 445.00 485.10 485.00 405.10 405.00 cable, E37-0979-05, which is available from the KENWOOD 460.10 460.00 450.10 450.00 490.10 490.00 410.10 410.00 parts center.

  • Page 42: Adjustment

    TKR-850 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment 1. Setting & 1) Connect the unit to a suitable DC power supply. 2) Turn the DC source switch on after connecting a PC and FPU cable to the radio. → “P.G.” appears on LED display Firmware →...
  • Page 43 TKR-850 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 1W 12. TX RF 1) Measure the power level at Power meter Rear TX ANT PC adj. low power TX ANT. Low CH (Shipping power)
  • Page 44 TKR-850 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment 17. Tight 1) Connect SSG to RX ANT. Rear RX ANT PC adj. squelch CH : 2 (Wide) Adjust to point of (Wide) SSG output : 7dB over to...
  • Page 45 TKR-850 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment 21. DQT 1) CH : 2 MOD ANA Rear TX OUT PC adj. Oscilloscope DC range balance Deviation meter filter Make the de- flat “A” part...
  • Page 46 TKR-850 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 0.1kHz 26. TA (TX 1) Insert AG output into the MOD ANA Rear TX ANT PC adj. audio input) control I/O TA terminal (pin 9). or 3.0kHz...
  • Page 47 TKR-850 ADJUSTMENT ATTEN 10dB MKR –42.17dB ATTEN 20dB MKR –26.17dBm ATTEN 10dB MKR –46.000dB RL –32.0dBm 10dB/ 25.00kHz RL 10.0dBm 10dB/ 465.00MHz RL –32.0dBm 10dB/ 15.00kHz More than More than 3dB Max. 3.75kHz 3.75kHz 3dB Max. 3dB Max. 5.5~7.5kHz 5.5~7.5kHz 5.5~7.5kHz...

  • Page 48: Terminal Function

    TKR-850 TERMINAL FUNCTION Connector Terminal Terminal I/O Terminal function Final Unit (X45-3630-XX) Name Connector Terminal Terminal I/O Terminal function STB1 Strobe data for shift register Name Clock data input TX driver input signal (Coaxial) Serial data input – – Reserved...
  • Page 49 TKR-850 TERMINAL FUNCTION Connector Terminal Terminal I/O Terminal function TX-RX Unit (X57-6270-XX) (B/2) : Control Section Name Connector Terminal Terminal I/O Terminal function Enable input for RX PLL Name Enable input for TX PLL CN600 O Power supply output after power...
  • Page 50 TKR-850 TERMINAL FUNCTION Connector Terminal Terminal I/O Terminal function Connector Terminal Terminal I/O Terminal function Name Name – Ground O RX data output (voice & data) O Output enable for shift register I/O Programable I/O 3 TEMP High temperature detector signal input...
  • Page 51 TKR-850 TERMINAL FUNCTION Connector Terminal Terminal I/O Terminal function Connector Terminal Terminal I/O Terminal function Name Name Clock input for PLL – RX signal ground Reference frequency signal input (for RA,RD ground only) CN350 – Ground Speaker mute signal input Switching signal input for TX VCO “L”: Mute on...

  • Page 52: Wiring

    TKR-850 TKR-850 WIRING...

  • Page 53: Pc Board Views

    TKR-850 PC BOARD VIEWS RX PLL/VCO (X58-4800-XX) RX PLL/VCO (X58-4800-XX) TX PLL/VCO (X58-4810-XX) TX PLL/VCO (X58-4810-XX) -10 : K,E -11 : K2 -12 : K3 Component side view -10 : K,E -11 : K2 -12 : K3 Foil side view...

  • Page 54: Display Unit (X54-3330-20)

    TKR-850 PC BOARD VIEWS DISPLAY UNIT (X54-3330-20) Component side view J72-0756-02 A/2 J72-0756-02 B/2 CN601 VR601 C603 C606 D506 D507 C602 S507 CP502 CP504 D602 D601 CP501 CP503 MAIN DC BACKUP R601 D505 HOOK J601 IC504 IC505 R543 R517 R606...
  • Page 55 TKR-850 PC BOARD VIEWS DISPLAY UNIT (X54-3330-20) Foil side view J72-0756-02 A/2 J72-0756-02 B/2 CN601 VR601 C606 C603 D507 D506 C602 S507 CP504 CP502 D602 D601 CP503 CP501 BACKUP MAIN DC R601 D505 HOOK J601 IC505 IC504 R543 R606 R517...

  • Page 56: Final Unit (X45-3630-Xx)

    TKR-850 PC BOARD VIEWS FINAL UNIT (X45-3630-XX) -10 : K,E -11 : K2 -12 : K3 Component side view CN8 GND CN6 MAIN DC J72-0755-02 A/2 (BLACK) (RED) CN7 BACKUP J72-0755-02 B/2 (ORANGE) CHARGE C118 C120 R26 R55 TX IN Component side Ref No.
  • Page 57 TKR-850 PC BOARD VIEWS FINAL UNIT (X45-3630-XX) -10 : K,E -11 : K2 -12 : K3 Foil side view J72-0755-02 A/2 C115 C114 J72-0755-02 B/2 C105 C101 C103 C102 Component side Ref No. Address Ref No. Address Pattern 1 Pattern 2...
  • Page 58 TKR-850 PC BOARD VIEWS FINAL UNIT (X45-3630-XX) -10 : K,E -11 : K2 -12 : K3 Component side view + Foil side CN8 GND CN6 MAIN DC J72-0755-02 A/2 (BLACK) (RED) C115 C114 CN7 BACKUP J72-0755-02 B/2 (ORANGE) CHARGE C105...

  • Page 59: Tx-Rx Unit (X57-6270-Xx) (A/2)

    TKR-850 PC BOARD VIEW TX-RX UNIT (X57-6270-XX) (A/2) -10 : K,E -11 : K2 -12 : K3 Component side view J72-0758-11 A/2 CN16 CN19 GND2 GND1 CN18 TP102 TX CV A2 : TX VCO (X58-481) C137 C139 CN15 NARROW WIDE...
  • Page 60 TKR-850 PC BOARD VIEW TX-RX UNIT (X57-6270-XX) (A/2) -10 : K,E -11 : K2 -12 : K3 Foil side view J72-0758-11 A/2 R136 R135 C211 or R168 R173 GND2 R179 or L45 R106 C127 + R148 C209 or C129 R121...
  • Page 61 TKR-850 PC BOARD VIEW TX-RX UNIT (X57-6270-XX) (A/2) -10 : K,E -11 : K2 -12 : K3 Component side view + Foil side J72-0758-11 A/2 CN16 CN19 R135 R136 C211 or R173 R168 R106 R179 GND2 C127 R148 or L45...

  • Page 62: Tx-Rx Unit (X57-6270-Xx) (B/2)

    TKR-850 PC BOARD VIEW TX-RX UNIT (X57-6270-XX) (B/2) -10 : K,E -11 : K2 -12 : K3 Component side view C806 C800 R781 IC627 IC630 C817 C789 L606 IC629 L607 C826 C801 + 3.3D C785 C795 D600 L601 C798 L604...
  • Page 63 TKR-850 PC BOARD VIEW TX-RX UNIT (X57-6270-XX) (B/2) -10 : K,E -11 : K2 -12 : K3 Foil side view Q602 Q601 CN602 C784 C787 R616 X600 R754 R606 Q606 IC600 R762 C783 D627 Q611 Q609 C635 C634 C629 Q603...
  • Page 64 TKR-850 PC BOARD VIEW TX-RX UNIT (X57-6270-XX) (B/2) -10 : K,E -11 : K2 -12 : K3 Component side view + Foil side Q601 Q602 CN602 C806 C800 C784 R781 C787 IC627 IC630 C817 C789 R616 X600 L606 R754 R606...
  • Page 65 TKR-850 Note : Components marked with a dot (·) are parts of pattern 1. CIRCUIT DIAGRAM...
  • Page 66 TKR-850 CIRCUIT DIAGRAM Note : Components marked with a dot (·) are parts of pattern 1.
  • Page 67 TKR-850 Note : Components marked with a dot (·) are parts of pattern 1. CIRCUIT DIAGRAM...

  • Page 68: Block Diagram

    TKR-850 TKR-850 TKR-850 BLOCK DIAGRAM...

  • Page 69: External Speaker)

    TKR-850 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).
  • Page 70 TKR-850 SPECIFICATIONS (K,K2,K3 TYPE) GENERAL Frequency Range ........ K : 450 to 480MHz K2 : 480 to 512MHz K3 : 400 to 430MHz Number of Channels ......16 channel Channel Spacing ......... Wide : 25kHz Narrow : 12.5kHz (PLL channel stepping 5kHz/6.25kHz) Operating Voltage .......
  • Page 71 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.

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