Kenwood TKR-851 Service Manual
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Kenwood TKR-851 Service Manual

Uhf fm repeater
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UHF FM REPEATER
TKR-851
SERVICE MANUAL
SUPPLEMENT II
This TKR-851 service manual contains a number of sections which differ from the service manual (B51-8684-00 and B51-8701-
00) for the TKR-851.
For items other than those in this TKR-851 service manual please refer to the service manual (B51-8684-00 and B51-8701-00)
for the TKR-851.
UHF FM REPEATER TKR-851
Antenna cable (N)
(E30-7528-05)
D-sub cable assy
(E37-0904-05)
TEST/SPKR connector assy
(E37-0913-05)
GENERAL ................................................................. 2
SYSTEM SET-UP ..................................................... 2
PARTS LIST .............................................................. 3
EXPLODED VIEW ................................................... 16
PACKING ................................................................ 18
ADJUSTMENT ....................................................... 19
INTERCONNECTION DIAGRAM ........................... 28
PC BOARD
FINAL UNIT (X45-374X-XX) .............................. 30
Front panel
(A62-0934-03)
Fuse (Blade, 10A/32V)
Key top
(F06-1032-05) x 2
(K29-5460-02)
Antenna cable (BNC)
(E30-3418-05)
DC cord (Ext DC in)
(E30-3414-05)
DC backup terminal
(E70-0402-05)
CONTENTS
© 2005-2 PRINTED IN JAPAN
B51-8709-00 ( N ) 864
Knob (Volume)
(K29-5389-03)
Modular jack
(E08-0877-05)
DISPLAY UNIT (X54-3330-21) ........................... 34
TX-RX UNIT (X57-696X-XX) (A/2) .................... 38
TX-RX UNIT (X57-696X-XX) (B/2) .................... 42
RX VCO UNIT (X58-480X-XX) ........................... 46
TX VCO UNIT (X58-481X-XX) ........................... 47
SCHEMATIC DIAGRAM ......................................... 48
BLOCK DIAGRAM .................................................. 61
SPECIFICATIONS ................................................... 64
Knob (DC source)
(K29-9106-04)

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  • Page 1: Table Of Contents

    This TKR-851 service manual contains a number of sections which differ from the service manual (B51-8684-00 and B51-8701- 00) for the TKR-851. For items other than those in this TKR-851 service manual please refer to the service manual (B51-8684-00 and B51-8701-00) for the TKR-851.

  • Page 2: General

    TKR-851 GENERAL / SYSTEM SET-UP INTRODUCTION PERSONAL SAFETY SCOPE OF THIS MANUAL The following precautions are recommended for personal 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 commu- any open connectors are properly terminated.

  • Page 3: Parts List

    E : Europe Les articles non mentionnes dans le Parts No. ne sont pas fournis. Y : AAFES (Europe) X : Australia M : Other Areas Teile ohne Parts No. werden nicht geliefert. TKR-851 (Y54-323X-XX) Desti- Desti- Ref. No. Address Parts No.
  • Page 4 TKR-851 PARTS LIST FINAL UNIT (X45-374X-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C93-0599-05 CHIP C 470PF FINAL UNIT (X45-374X-XX) 0-13 : K2,M2 2-71 : K,E 2-72 : E3...
  • Page 5 TKR-851 PARTS LIST FINAL UNIT (X45-374X-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C173,174 CC73FCH1H220J CHIP C 22PF RK73FB2A104J CHIP R 100K 1/10W C177 CC73FCH1H150J CHIP C 15PF R20,21...
  • Page 6 TKR-851 PARTS LIST DISPLAY UNIT (X54-3330-21) TX-RX UNIT (X57-696X-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation D603 MINISMDC020 VARISTOR DISPLAY UNIT (X54-3330-21) IC501 NJM4558E MOS-IC D503-505 B30-2151-05 LED (RED/GREEN)
  • Page 7 TKR-851 PARTS LIST TX-RX UNIT (X57-696X-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation CK73GB1H103K CHIP C 0.010UF C149 CK73GB1H103K CHIP C 0.010UF CC73GCH1H080D CHIP C 8.0PF C150 C92-0633-05 CHIP-TAN...
  • Page 8 TKR-851 PARTS LIST TX-RX UNIT (X57-696X-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C643 C92-0628-05 CHIP-TAN 10UF 10WV C756,757 C92-0628-05 CHIP-TAN 10UF 10WV C644 CK73GB1E103K CHIP C 0.010UF C758...
  • Page 9 TKR-851 PARTS LIST TX-RX UNIT (X57-696X-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation E04-0154-05 PIN SOCKET L92-0158-05 CHIP FERRITE E40-5538-05 PIN ASSY L40-1875-92 SMALL FIXED INDUCTOR (18NH) E04-0154-05 PIN SOCKET L40-6865-92 SMALL FIXED INDUCTOR (6.8NH)
  • Page 10 TKR-851 PARTS LIST TX-RX UNIT (X57-696X-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation RK73GB1J223J CHIP R 1/16W R150 RK73GB1J180J CHIP R 1/16W RK73GB1J682J CHIP R 6.8K 1/16W R151-158 RK73GB1J102J CHIP R 1.0K...
  • Page 11 TKR-851 PARTS LIST TX-RX UNIT (X57-696X-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation R669-671 RK73GB1J223J CHIP R 1/16W R760 RK73GB1J122J CHIP R 1.2K 1/16W R672 RK73GB1J104J CHIP R 100K...
  • Page 12 TKR-851 PARTS LIST TX-RX UNIT (X57-696X-XX) RX VCO UNIT (X58-480X-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation R839,840 RK73GB1J561J CHIP R 1/16W DTC144EUA DIGITAL TRANSISTOR R841,842 R92-0670-05 CHIP R...
  • Page 13 TKR-851 PARTS LIST RX VCO UNIT (X58-480X-XX) TX VCO UNIT (X58-481X-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C323 CK73FB1E224K CHIP C 0.22UF R315 RK73GB1J151J CHIP R 1/16W C324...
  • Page 14 TKR-851 PARTS LIST TX VCO UNIT (X58-481X-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C350,351 CK73GB1H471K CHIP C 470PF K,M2,E L352-354 L40-1095-34 SMALL FIXED INDUCTOR (1UH) C350,351 CK73GB1H471K CHIP C...
  • Page 15 TKR-851 PARTS LIST TX VCO UNIT (X58-481X-XX) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation D354 1SV214 VARIABLE CAPACITANCE DIODE K,M2,E D354 1SV214 VARIABLE CAPACITANCE DIODE D355 1SV214 VARIABLE CAPACITANCE DIODE...

  • Page 16: Exploded View

    TKR-851 EXPLODED VIEW : N09-2292-05 M2.6 x 6 : N30-2606-46 M4 x 6 : N30-4006-46 D M4 x 14 : N30-4014-46 M4 x 20 BLK : N30-4020-45 M3 x 6 (F) : N32-3006-46 G M4 x 8 (F) BLK : N32-4008-45...
  • Page 17 TKR-851 EXPLODED VIEW Kx14 35x2 A/2) Final (B/2) 47x2 Parts with the exploded numbers larger than 700 are not supplied.

  • Page 18: Packing

    TKR-851 PACKING 52 Protection bag (H25-0029-04) 48 Cushion (G13-1801-04) 59 Foot (J02-0475-05) x 2 49 Cushion (G13-1802-04) 60 Foot (J02-0492-04) x 2 53 Protetion bag (H25-0747-04) 62 Grommet (J59-0302-05) x 2 61 Hardware fixture (J21-8402-04) C Binding head machine screw (N30-4006-46) x 2...
  • Page 19 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...
  • Page 20 TKR-851 ADJUSTMENT ATTEN 10dB MKR –42.17dB ATTEN 10dB MKR –46.000dB ATTEN 20dB MKR –26.17dBm RL –32.0dBm 25.00kHz 10dB/ RL –32.0dBm 10dB/ 15.00kHz RL 10.0dBm 10dB/ 465.00MHz More than More than 3dB Max. 3.75kHz 3.75kHz 3dB Max. 5.5~7.5kHz 5.5~7.5kHz 25.00kHz 15.00kHz 465.00MHz...
  • Page 21 FPU (KPG-91D) menu and adjusting the power, deviation, receiver sensitivity, etc at the frequency of the channel to be used by the TKR-851. adjust the set value for the item to an optimum value with the “TEST”...
  • Page 22 TKR-851 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment 7. Setting 1) Remove 8 pin cable and the coaxial cable from CN16, and CN19 on TX-RX side. 8. TX 1) Connect the frequency f. counter TX-RX CN19 PC adj.
  • Page 23 TKR-851 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment (Wide 4kHz) 3) CH : 2 (Wide 4kHz) Rear RX ANT PC adj. SSG output : 4dB below to Adjust to point of 12dB SINAD level...
  • Page 24 TKR-851 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 20mV (Wide 4kHz) 2) CH : 2 (Wide 4kHz) Rear RX ANT PC adj. SSG output : –53dBm/501µV 400mV SSG MOD : 1kHz CONTROL SSG DEV : 2.4kHz...
  • Page 25 TKR-851 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 0.05kHz 23. DQT 1) CH : 2 MOD ANA Rear TX ANT PC adj. deviation Deviation meter filter 0.75kHz (Wide) HPF : OFF Deviation LPF : 3kHz...
  • Page 26 TKR-851 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 0.1kHz 28. DTMF 1) CH : 2 MOD ANA Rear TX ANT PC adj. deviation Deviation meter filter 3.0kHz (Wide) HPF : OFF Deviation LPF : 15kHz...
  • Page 27 TKR-851 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 0.1kHz 33. Repeat 1) CH : 2 Rear RX ANT PC adj. gain level SSG output : –53dBm 1kHz (Wide) SSG MOD : 1kHz MOD ANA...

  • Page 28: Interconnection Diagram

    TKR-851 INTERCONNECTION DIAGRAM CN605 INT SP TX-RX UNIT B/2 TX-RX UN X57-696*-** X57-696 CN602 DISPLAY UNIT A/2 X54-3330-21 1.8C 1.8V AVR 8V A 3.3D 3.3V AVR 5V AVR 8CT(8C) 8V A CN600 5V AVR 5V AVR 5V AVR 3.3V AVR 3.3A...
  • Page 29 TKR-851 INTERCONNECTION DIAGRAM CN18 RX ANT TX-RX UNIT A/2 X57-696*-** MAIN DC CN15 MAIN DC – BACKUP BATTERY BACKUP – 8V AVR 5V AVR FINAL UNIT B/2 CN16 X45-374*-** 8V AVR 5V AVR FINAL UNIT A/2 X45-374*-** 9V AVR CN19...
  • Page 30 CN605 CN18 RX ANT INT SP TX-RX UNIT B/2 TX-RX UNIT A/2 X57-696*-** X57-696*-** MAIN DC CN15 MAIN DC – CN602 DISPLAY UNIT A/2 BACKUP BATTERY BACKUP – X54-3330-21 1.8C 1.8V AVR 8V AVR 3.3D 3.3V AVR 5V AVR FINAL UNIT B/2 CN16 X45-374*-** 8CT(8C)

  • Page 31: Final Unit (X45-374X-Xx)

    TKR-851 PC BOARD FINAL UNIT (X45-374X-XX) 0-13 : K2,M2 2-71 : K,E 2-72 : E3 Component side view (J72-0971-29) CN8 E CN6 MAIN DC (BLACK) (RED) CN7 BACKUP (ORANGE) Back up battery Main DC CHARGE C191 C173 C169 C120 FAB 1...
  • Page 32 TKR-851 PC BOARD FINAL UNIT (X45-374X-XX) 0-13 : K2,M2 2-71 : K,E 2-72 : E3 Component side view (J72-0971-29) J72-0971-29 (A/2) C118 C165 C178 C120 C166 CN53 ANT SW Component side Layer 1 Layer 2 Layer 3 Layer 4 Foil side...
  • Page 33 TKR-851 TKR-851 PC BOARD PC BOARD FINAL UNIT (X45-374X-XX) 0-13 : K2,M2 2-71 : K,E 2-72 : E3 FINAL UNIT (X45-374X-XX) 0-13 : K2,M2 2-71 : K,E 2-72 : E3 Component side view (J72-0971-29) Component side view (J72-0971-29) J72-0971-29 (A/2)
  • Page 34 TKR-851 PC BOARD FINAL UNIT (X45-374X-XX) 0-13 : K2,M2 2-71 : K,E 2-72 : E3 Foil side view (J72-0971-29) J72-0971-29 (A/2) C179 C109 C108 C157 Ref. No. Address Ref. No. Address...
  • Page 35 TKR-851 PC BOARD FINAL UNIT (X45-374X-XX) 0-13 : K2,M2 2-71 : K,E 2-72 : E3 Foil side view (J72-0971-29) C115 C114 C168 C189 Back up battery Main DC C170 C105 C174 C109 C108 C101 C171 C103 C102 J72-0971-29 (B/2) Component side...
  • Page 36 TKR-851 TKR-851 PC BOARD PC BOARD FINAL UNIT (X45-374X-XX) 0-13 : K2,M2 2-71 : K,E 2-72 : E3 FINAL UNIT (X45-374X-XX) 0-13 : K2,M2 2-71 : K,E 2-72 : E3 Foil side view (J72-0971-29) Foil side view (J72-0971-29) J72-0971-29 (A/2)

  • Page 37: Display Unit (X54-3330-21)

    TKR-851 PC BOARD DISPLAY UNIT (X54-3330-21) Component side view (J72-0756-12) VR601 J601 IC504 D503 J72-0756-12 B/2 S501 S503 S504 S502 Q512...
  • Page 38 TKR-851 PC BOARD DISPLAY UNIT (X54-3330-21) Component side view (J72-0756-12) J72-0756-12 A/2 S507 POWER D505 D507 D506 MAIN BACK- IC504 IC505 D504 BUSY Component side S505 S506 Layer 1 Layer 2 Foil side Q514 Ref. No. Address IC504 IC505 Q512...
  • Page 39 TKR-851 TKR-851 PC BOARD PC BOARD DISPLAY UNIT (X54-3330-21) Component side view (J72-0756-12) DISPLAY UNIT (X54-3330-21) Component side view (J72-0756-12) J72-0756-12 A/2 VR601 S507 POWER D505 D507 D506 MAIN BACK- J601 IC504 IC505 D503 D504 BUSY J72-0756-12 B/2 Component side...
  • Page 40 TKR-851 PC BOARD DISPLAY UNIT (X54-3330-21) Foil side view (J72-0756-12) J72-0756-12 A/2 CP504 CP502 CP503 CP501 BACKUP MAIN DC R543 R606 R517 Q525 Q507 Q504 Q509 R538 BUSY R518 Q503 D508 D509 C516 C517 R525 C526 Component side C518 D502...
  • Page 41 TKR-851 PC BOARD DISPLAY UNIT (X54-3330-21) Foil side view (J72-0756-12) CN601 C606 C603 C602 D602 D601 R601 J72-0756-12 B/2 CN502 C513 R522 C508 R511 R512 R529 R513 Q513 R533 IC501...
  • Page 42 TKR-851 TKR-851 PC BOARD PC BOARD DISPLAY UNIT (X54-3330-21) Foil side view (J72-0756-12) DISPLAY UNIT (X54-3330-21) Foil side view (J72-0756-12) J72-0756-12 A/2 CN601 C606 C603 C602 CP504 CP502 D602 D601 CP503 CP501 BACKUP MAIN DC R601 R543 R606 R517 Q525...

  • Page 43: Tx-Rx Unit (X57-696X-Xx) (A/2)

    TKR-851 PC BOARD TX-RX UNIT (X57-696X-XX) (A/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 Component side view (J72-0924-19 A/2) CN18 CN15 NARROW WIDE R181 CN14 Ref. No. Address Ref. No. Address Ref. No. Address IC10...
  • Page 44 TKR-851 PC BOARD TX-RX UNIT (X57-696X-XX) (A/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 Component side view (J72-0924-19 A/2) CN16 CN19 GND2 GND1 TP102 TX CV A2 : TX VCO (X58-481) C137 C139 GND2 GND1...
  • Page 45 TKR-851 TKR-851 PC BOARD PC BOARD TX-RX UNIT (X57-696X-XX) (A/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 TX-RX UNIT (X57-696X-XX) (A/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 Component side view (J72-0924-19 A/2)
  • Page 46 TKR-851 PC BOARD TX-RX UNIT (X57-696X-XX) (A/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 Foil side view (J72-0924-19 A/2) R136 R135 R168 GND2 R179 R106 C127 R148 R145 C129 R121 C211 C167 C123 or R173...
  • Page 47 TKR-851 PC BOARD TX-RX UNIT (X57-696X-XX) (A/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 Foil side view (J72-0924-19 A/2) R171 C199 C198 C65 + R160 C197 R150 C163 C155 C154 + C218 R176 C72 +...
  • Page 48 TKR-851 TKR-851 PC BOARD PC BOARD TX-RX UNIT (X57-696X-XX) (A/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 TX-RX UNIT (X57-696X-XX) (A/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 Foil side view (J72-0924-19 A/2)
  • Page 49 TKR-851 PC BOARD TX-RX UNIT (X57-696X-XX) (B/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 Component side view (J72-0924-19 B/2) CN600 C806 L606 IC627 5-TONE C826 3.3D D600 C785 L601 R836 L604 Q612 C613 R603 IC601...

  • Page 50: Tx-Rx Unit (X57-696X-Xx) (B/2)

    TKR-851 PC BOARD TX-RX UNIT (X57-696X-XX) (B/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 Component side view (J72-0924-19 B/2) C800 CN610 R781 CN609 C817 C789 IC629 CP600 L607 IC630 C801 CP601 C795 C798 C814 R654...
  • Page 51 TKR-851 TKR-851 PC BOARD PC BOARD TX-RX UNIT (X57-696X-XX) (B/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 TX-RX UNIT (X57-696X-XX) (B/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 Component side view (J72-0924-19 B/2)
  • Page 52 TKR-851 PC BOARD TX-RX UNIT (X57-696X-XX) (B/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 Foil side view (J72-0924-19 B/2) C784 CN602 C787 R754 Q606 R762 C783 D627 Q611 Q609 C791 R811 R767 C815 R802 R745...
  • Page 53 TKR-851 PC BOARD TX-RX UNIT (X57-696X-XX) (B/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 Foil side view (J72-0924-19 B/2) Q601 Q602 IC632 R832 C836 IC631 R831 R828 R818 C838 C837 R819 R826 C842 C833 R616...
  • Page 54 TKR-851 TKR-851 PC BOARD PC BOARD TX-RX UNIT (X57-696X-XX) (B/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 TX-RX UNIT (X57-696X-XX) (B/2) 0-11 : K 0-12 : K2,M2 2-70 : E 2-71 : E3 Foil side view (J72-0924-19 B/2)

  • Page 55: Rx Vco Unit (X58-480X-Xx)

    TKR-851 PC BOARD RX VCO UNIT (X58-480X-XX) 0-10 : K,E 0-11 : K2,M2 0-12 : E3 (J72-0751-02) Component side view Foil side view J72-0751-02 A/2 J72-0751-02 A/2 C379 R368 C377 L362 R360 R366 R361 R363 C378 R356 R357 Q353 R367...

  • Page 56: Tx Vco Unit (X58-481X-Xx)

    TKR-851 PC BOARD TX VCO UNIT (X58-481X-XX) 0-10 : K,E 0-11 : K2,M2 0-12 : E3 (J72-0752-12) Component side view Foil side view J72-0752-12 A/2 J72-0752-12 A/2 C379 R368 C377 L362 R366 C378 R376 R367 L360 L361 C374 R359 R358...

  • Page 57: Schematic Diagram

    TKR-851 SCHEMATIC DIAGRAM FINAL UNIT (X45-374X-XX) (A/2) T:7.57V T:7.91V T:7.61V R:0V R:0V R:0V RF AMP RF AMP 2SC3356(R24) 470p 470p 6.8n 2SK2596 2SC5110(O) RF AMP T:0.70V T:0.69V R:0V R:0V 2SC4116(Y) DC SWITCH SURGE VOLTAGE PROTECTOR THERMOSTAT REGULATOR T:13.03V R:13.54V MAX6502UKP035...
  • Page 58 TKR-851 SCHEMATIC DIAGRAM • Note : The components marked with a dot ( ) are parts of layer 1. FINAL UNIT (X45-374X-XX) (A/2) DRIVE FINAL AMP C160 PD55008S RD60HUF1-01 TX ANT D4,5 RF DETECTOR T:4.26V R:0V MA4PH633 DC AMP VOLTAGE...
  • Page 59 FINAL UNIT (X45-374X-XX) (A/2) T:7.57V T:7.61V T:7.91V R:0V R:0V R:0V DRIVE FINAL AMP C160 RF AMP PD55008S RD60HUF1-01 RF AMP 2SC3356(R24) TX ANT 470p 470p 6.8n 2SC5110(O) 2SK2596 RF AMP T:0.70V T:0.69V R:0V R:0V D4,5 RF DETECTOR T:4.26V R:0V MA4PH633 DC AMP VOLTAGE C120...
  • Page 60 TKR-851 SCHEMATIC DIAGRAM Note : The components marked with a dot ( • ) are parts of layer 1. DISPLAY UNIT (X54-3330-21) (A/2) D506 CP501 LA-501DD 470*4 S506 S502 S503 S504 S505 7SEGMENT S501 C519 0.01u SHIFT REGISTER Q517 UPA672T...
  • Page 61 TKR-851 SCHEMATIC DIAGRAM DISPLAY UNIT (X54-3330-21) (A/2) D507 CP502 CP503 CP504 LA-501DD 470*4 470*4 470*4 7SEGMENT DC SW C520 0.01u SHIFT Q518 Q521 REGISTER UPA672T UPA672T DC SW DC SW Q’S DC SW Q519 UPA672T DATA DC SW VOLTAGE REGULATOR...
  • Page 62 DISPLAY UNIT (X54-3330-21) (A/2) D506 D507 CP501 CP502 CP503 CP504 LA-501DD LA-501DD 470*4 470*4 470*4 470*4 S506 7SEGMENT 7SEGMENT S501 S502 S503 S504 S505 DC SW C519 0.01u C520 0.01u SHIFT SHIFT Q518 Q521 REGISTER REGISTER UPA672T UPA672T Q517 DC SW DC SW UPA672T DC SW...
  • Page 63 TKR-851 SCHEMATIC DIAGRAM TX-RX UNIT (X57-696X-XX) (A/2) A2 SUB UNIT (TX VCO/PLL) (X58-4810-XX) D350 FREQUENCY D354 CONTROL MODULATION L352 R351 TX-CV U-TXVCO (TP102) (Used for K,E,K2) CN351 BUFFER C368 Q355 2SC4226(R24) C379 -6.0dBm L353 D352 C356 L356 Q350 C374 R353...
  • Page 64 TKR-851 SCHEMATIC DIAGRAM TX-RX UNIT (X57-696X-XX) (A/2) A3 SUB UNIT (RX VCO/PLL) (X58-4800-XX) R368 L352 BUFFER CN351 R351 R354 Q355 V-RXVCOL 2SC4226(R24) C379 -3.0dBm C374 R359 C368 RX-CV (TP101) 0.5p FREQUENCY VCO OSC CONTROL Q350 L353 D352 DC SW C356...
  • Page 65 TKR-851 SCHEMATIC DIAGRAM TX-RX UNIT (X57-696X-XX) (A/2) R144 4.7k C164 470p TX SW 1.26V R135 B:1.56V T:8.05V T:2.02V DC SW DC SW E:0.79V 2SB1132(Q,R) R:0V 2SB1386(R) DAN235K R:0V 7.84V C:6.25V C101 R106 T:0V R:2.02V R129 R130 R168 RF AMP DC SW...
  • Page 66 TKR-851 SCHEMATIC DIAGRAM TX-RX UNIT (X57-696X-XX) (A/2) E04-0154-05 +3.0dBm CN19 FINAL UNIT (X45-374X-XX) (A/2)-CN1 SHIFT CONVERTER REGISTER M62354GP BU4094BCF CN15 E40-5703-05 FINAL UNIT STRB (X45-374X-XX) (A/2)-CN5 DATA CN16 E40-5632-05 FINAL UNIT (X45-374X-XX) (A/2)-CN3 Q’S CN14 E40-6009-05 S76-0401-05 28.5mV DC SW...
  • Page 67 TX-RX UNIT (X57-696X-XX) (A/2) A2 SUB UNIT (TX VCO/PLL) (X58-4810-XX) R144 4.7k +3.0dBm E04-0154-05 CN19 C164 470p FINAL UNIT A3 SUB UNIT (RX VCO/PLL) (X58-4800-XX) TX SW (X45-374X-XX) 1.26V R135 (A/2)-CN1 B:1.56V T:8.05V E:0.79V T:2.02V DC SW 2SB1132(Q,R) DC SW SHIFT D350 DAN235K...
  • Page 68 TKR-851 SCHEMATIC DIAGRAM Note : The components marked with • a dot ( ) are parts of layer 1. TX-RX UNIT (X57-696X-XX) (B/2) SURGE PROTECTOR D600 DA204U CN600 E40-6102-05 R605 BATT C600 100k 0.1u STB1 STB1 PTT/TXD1 TXD1 VOLTAGE DETECTOR...
  • Page 69 TKR-851 SCHEMATIC DIAGRAM TX-RX UNIT (X57-696X-XX) (B/2) 5.03V R814 R659 R660 R661 CP613 1k*2 KEY4 KEY4 R817 3.24V KEY5 KEY5 5TONE CP620 CP614 1k*2 100*2 EMON EMON R662 R618 BYTE CNVSS CNVss CP603 100*2 CP615 10*4 RESET RESET XOUT R629...
  • Page 70 TKR-851 SCHEMATIC DIAGRAM TX-RX UNIT (X57-696X-XX) (B/2) L606 L607 10u10 C754 C749 470p NC18 C750 0.01u NC17 CVDD7 R691 HCNTL0 HCNTL0 VSS6 BCLKR0 BCLK BCLKR1 BFSR0 BFSR1 LRCK SDT0 BDR0 R692 HCNTL1 HCNTL1 R813 BDR1 BCLK BCLKX0 C759 470p MCLK...
  • Page 71 TKR-851 SCHEMATIC DIAGRAM TX-RX UNIT (X57-696X-XX) (B/2) AMPSW AMPSW 5V AVR IC624 IC627 XC62FP1802P TA78L05F 1.81V 5.03V 8.03V 1.8V AVR 1.8C VOUT OUTX INVERTER IC625 IC628 IC621 3.3V AVR XC62FP3302P TA78L05F 3.30V 5.02V TC7S00FU 5V AVR NAND GATE 3.3D VOUT...
  • Page 72 TKR-851 SCHEMATIC DIAGRAM TX-RX UNIT (X57-696X-XX) (B/2) 13.07V C783 470p 13.07V AMPSW IC629 Q610 AUDIO AMP LA4422 2SJ506(S) 1.21V DC SW DC SW Q611 DTC114EUA Q609 DTC114EUA CURRENT DC SW PROTECTOR D627,628 REVERSE CURRENT C814 PROTECTOR 1000u25 C787 C811 R758...
  • Page 73 TX-RX UNIT (X57-696X-XX) (B/2) 5.03V C783 470p 13.07V 13.07V SURGE AMPSW AMPSW AMPSW IC629 PROTECTOR Q610 AUDIO AMP 2SJ506(S) LA4422 D600 IC624 IC627 5V AVR DC SW 1.21V DA204U DC SW 1.81V XC62FP1802P 1.8V AVR 5.03V TA78L05F 8.03V Q611 CN600 E40-6102-05 L606 1.8C...

  • Page 74: Block Diagram

    TKR-851 BLOCK DIAGRAM TX-RX unit (CONTROL) X57 CN605 INT SP CN604 DAT,CLK,SOE RSSI Display unit Shift Reg. X54-333 (B/2) MIC JACK TEST/SPKR IC623 VR601 A01~5 BU4094BCF AF VOL D626 PTT/TXD CN603 MINISMDE190 D603 HK/RXD CN601 Display unit CN501 X54-333 (A/2)
  • Page 75 TKR-851 BLOCK DIAGRAM -RX unit (CONTROL) X57-696 (B/2) IC624 XC62FP1802P 1.8V 1.8C IC625 IC628 XC62FP3302P TA78L05F 3.3V IC622 Q606 3.3D TC7S66FU DTC363EK AF AMP IC626 IC630 IC629 MUTE DAT,CLK,SOE,STB2 TA78L05F XC62FP3302P RSSI LA4422 RSSI 3.3V 3.3A Q605 Q610 DTC114EUA Shift Reg.5...
  • Page 76 TKR-851 BLOCK DIAGRAM TX-RX unit X57-696 (A/2) 44.850MHz RF AMP MCF(W) DAN235K DAN235K L4,5 2SC357 RX ANT IF AMP IF AMP CN18 CN14 2SC3357 2SC3356 RX VCO 2SC3356(R24) 2SC3357 MCF(N) VCOA FM IC 9CLR IC9 : TK14489V VCOB RSSI 2SC3356...

  • Page 77: Specifications

    TKR-851 SPECIFICATIONS (K,K2,M2 TYPE) GENERAL Frequency Range ........ 450 to 480MHz (K) 480 to 512MHz (K2,M2) Number of Channels ......16 channel Channel Spacing ......... Wide : 25kHz Narrow : 12.5kHz (PLL channel stepping 5kHz/6.25kHz) Operating Voltage ....... 13.6V DC± 15% (10.8~15.6V) Current Drain Standby ..........
  • Page 78 SPECIFICATIONS (E,E3 TYPE) GENERAL Frequency Range ........440 to 470MHz (E) 400 to 430MHz (E3) Number of Channels ......... 16 channel Channel Spacing ........Wide 5kHz : 25kHz *Wide 4kHz : 20kHz Narrow : 12.5kHz (PLL channel stepping 5kHz/6.25kHz) Operating Voltage ........13.2V DC Current Drain Standby ..........
  • Page 79 Rembrücker Str. 15, 63150 Heusenstamm, Germany Leuvensesteenweg 248 J, 1800 Vilvoorde, Belgium 13, Boulevard Ney, 75018 Paris, France KENWOOD House, Dwight Road, Watford, Herts., WD18 9EB United Kingdom Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands Via G. Sirtori, 7/9 20129 Milano, Italy Bolivia, 239-08020 Barcelona, Spain (A.C.N.

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