Kenwood TK-2312 Service Manual
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Kenwood TK-2312 Service Manual

Vhf fm transceiver
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VHF FM TRANSCEIVER
TK-2312/2317
SERVICE MANUAL
Helical antenna
(T90-1036-15): TK-2312
Button knob (PTT)
(K29-9425-03)
Button knob
(SIDE1/SIDE2)
(K29-9426-03)
Key top (7key)
(K29-9463-02)
Plastic cabinet assy
(A02-4095-23)
This product complies with the
RoHS
Knob (Selector)
(K29-9427-03)
Knob (Volume)
(K29-9309-13)
directive for the European market.
© 2010-9 PRINTED IN JA PAN
B51-8933-00 ( N ) 632
CONTENTS
GENERAL .....................................................2
SYSTEM SET-UP .........................................3
REALIGNMENT ...........................................3
DISASSEMBLY FOR REPAIR ......................9
CIRCUIT DESCRIPTION ............................12
SEMICONDUCTOR DATA .........................17
COMPONENTS DESCRIPTION .................18
PARTS LIST ...............................................19
EXPLODED VIEW ......................................26
PACKING ....................................................27
ADJUSTMENT ..........................................29
TX-RX UNIT (X57-7880-20) ...................34
SCHEMATIC DIAGRAM ............................38
BLOCK DIAGRAM .....................................44
LEVEL DIAGRAM ......................................46
SPECIFICATIONS ...................BACK COVER
This product uses Lead Free solder.

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  • Page 1: Table Of Contents

    GENERAL .............2 SYSTEM SET-UP .........3 REALIGNMENT ...........3 DISASSEMBLY FOR REPAIR ......9 CIRCUIT DESCRIPTION ......12 SEMICONDUCTOR DATA ......17 Helical antenna Knob (Selector) (T90-1036-15): TK-2312 (K29-9427-03) COMPONENTS DESCRIPTION ....18 Knob (Volume) PARTS LIST ..........19 (K29-9309-13) EXPLODED VIEW ........26 PACKING ............27 ADJUSTMENT ..........29 PC BOARD TX-RX UNIT (X57-7880-20) ....34...

  • Page 2: General

    Kenwood assumes no responsibility for er- rors or omissions. Neither is any liability assumed for dam- ages resulting from the use of the information contained herein. Kenwood reserves the right to make changes to any products herein at any time for improvement purposes. GENERAL...

  • Page 3: System Set-Up

    TK-2312/2317 SYSTEM SET-UP Merchandise received Frequency range (MHz) RF power Type TX/RX 136~174 5.0W TK-2312 K,M,P Choose the type of transceiver TX/RX 136~174 5.0W TK-2317 M Transceiver programming A personal computer, programming interface (KPG-22/22A), and FPU (programming software) are required for programming.
  • Page 4 TK-2312/2317 REALIGNMENT 3-6. Programming with PC 3. PC Mode If data is transferred to the transceiver from a PC with 3-1. Preface the FPU, the data for each set can be modifi ed. The transceiver is programmed by using a personal com-...
  • Page 5 TK-2312/2317 REALIGNMENT • Electronic interface may cause a failure in data transfer 4. Wireless Clone Mode during Wireless Clone, such as when waveforms or elec- 4-1. Outline tromagnetics are being performed at the workbench. “Wireless Clone Mode” copies the transceiver data to •...

  • Page 6: Self Programming Mode

    TK-2312/2317 REALIGNMENT Key operation 5. Self Programming Mode Key Function Write mode for frequency data and signaling, etc. To be used ONLY by the authorized service person maintaining the Toggle between Zone selection and Channel selec- [Selector] tion user's equipment. After programming, reset the FPU to the “Self- Programming”...
  • Page 7 TK-2312/2317 REALIGNMENT 5-5. Item Setting Mode 5-6. Self Programming Mode fl ow chart ■ Channel selection mode fl ow chart In this mode, the selected item in the Item Selection mode can be programmed. When the [S] key is pressed in the Item Selection mode,...

  • Page 8: Firmware Version Information Mode

    TK-2312/2317 REALIGNMENT ■ Item setting mode fl ow chart 6. Firmware Version Information Mode Display Turn the transceiver ON with the [Side1] and [Side2] keys Current 136. 00000 held down. Then, the version is displayed during holding the [1. RX frequency] or setting value [Side1] and [Side2] keys.

  • Page 9: Disassembly For Repair

    TK-2312/2317 DISASSEMBLY FOR REPAIR 1. Removing the Case Assembly from the 3. Removing the TX-RX unit from the Chassis Chassis 1. Remove the selector knob q and volume knob w. 1. Remove the eleven screws y fi xing the TX-RX unit.
  • Page 10 TK-2312/2317 DISASSEMBLY FOR REPAIR 5. Attaching the Battery Release Lever to 6. Assembling the Battery Release Lever 1. Place the lever w onto the stopper q. the Case Assembly 2. Place the thick spring e onto the lever. 1. Insert one side of the shaft into the hole at the lever fi t- 3.
  • Page 11 TK-2312/2317 DISASSEMBLY FOR REPAIR 8. Mounting the Chassis to the Case 10. The Nuts of the Volume Knob and Assembly Channel Knob 1. Confirm that the waterproof packing attached to the Note that the shapes, colors and heights of nuts of the...

  • Page 12: Circuit Description

    TK-2312/2317 CIRCUIT DESCRIPTION 1. Frequency Confi guration The receiver utilizes double conversion. The first IF is 49.95MHz and the second IF is 450kHz. The fi rst Local os- cillator is supplied from the PLL circuit. The PLL circuit in the transmitter generates the neces- sary frequencies.
  • Page 13 TK-2312/2317 CIRCUIT DESCRIPTION 2-3. IF Amplifi er Circuit 2-5. Audio Amplifi er Circuit The fi rst IF signal is passed through a four-pole mono- The demodulated signal from IC401 is sent to an AF am- lithic crystal fi lter (XF401) to remove the adjacent channel plifi...
  • Page 14 TK-2312/2317 CIRCUIT DESCRIPTION 3-2. Driver and Final Amplifi er Circuit 3-3. APC Circuit The signal from the T/R switch (D18 is on) is amplifi ed by The APC circuit always monitors the current flowing the RF AMP (Q201) and pre-drive amplifi er (Q203) to 50mW.
  • Page 15 TK-2312/2317 CIRCUIT DESCRIPTION 5-2. Memory Circuit The Memory circuit consists of the MCU (IC820) and EEPROM (IC810). The EEPROM has a capacity of 512k bits BUFF BUFF (TX: High) RF AMP and stores the channel information, the last channel data, the scan on status, and other parameters.

  • Page 16: Power Supply

    TK-2312/2317 CIRCUIT DESCRIPTION ■ High-speed data (2-tone) 5-4. Key Input Keys and channel selector circuit. High-speed data (HSD) is output from pin 3 of the MCU. The signal from the keys and channel selector are direct- HSD deviation made by an adjustment in the MCU is passed ly input to the MCU, as shown in Figure 10.

  • Page 17: Semiconductor Data

    TK-2312/2317 SEMICONDUCTOR DATA MCU: F363BEDFEKDLB (TX-RX unit: IC820) Pin No. Signal Name Function CM_DTI Baseband IC data input Pin No. Signal Name Function CM_CNS Baseband IC chip select output BSHIFT CPU clock frequency shift DC_SW APC voltage discharge switch LSDO...

  • Page 18: Components Description

    TK-2312/2317 COMPONENTS DESCRIPTION TX-RX unit (X57-7880-20) Ref. No. Use / Function Operation / Condition Q804 DC switching 33MS from 33M Ref. No. Use / Function Operation / Condition Q805 DC switching Green/Red LED PLL IC TX/RX 1st local Q806 DC switching MCU clock shift circuit OP amplifi...

  • Page 19: Parts List

    PAN HEAD MACHINE SCREW (SMA) CK73HB1H471K CHIP C 470PF N30-2606-48 PAN HEAD MACHINE SCREW 2B,3A N83-2005-48 PAN HEAD TAPTITE SCREW CK73HB1E103K CHIP C 0.010UF C37,38 CK73HB1A104K CHIP C 0.10UF K1: TK-2312 K M1: TK-2312 M P1: TK-2312 P M: TK-2317 M...
  • Page 20 CHIP C 22PF C444 CC73HCH1H020B CHIP C 2.0PF C240 CK73GB1H102K CHIP C 1000PF C445,446 CC73HCH1H130J CHIP C 13PF C241 CC73GCH1H1R5B CHIP C 1.5PF C447,448 CC73HCH1H030B CHIP C 3.0PF K1: TK-2312 K M1: TK-2312 M P1: TK-2312 P M: TK-2317 M...
  • Page 21 C857 CK73HB1H332K CHIP C 3300PF C858 CK73HB1E682K CHIP C 6800PF F801 F53-0324-15 FUSE (2.5A) C859 CK73HB1A105K CHIP C 1.0UF F802 F53-0319-15 FUSE (1.0A) C861 CK73HB1H102K CHIP C 1000PF K1: TK-2312 K M1: TK-2312 M P1: TK-2312 P M: TK-2317 M...
  • Page 22 L41-5678-14 SMALL FIXED INDUCTOR (56NH) RK73GB2A224J CHIP R 220K 1/10W L420 L40-4775-57 SMALL FIXED INDUCTOR (47.0NH) RK73HB1J471J CHIP R 1/16W RK73HB1J683J CHIP R 1/16W L801 L92-0472-05 CHIP FERRITE K1: TK-2312 K M1: TK-2312 M P1: TK-2312 P M: TK-2317 M...
  • Page 23 1/16W R831,832 RK73HB1J000J CHIP R 1/16W R414 RK73HB1J101J CHIP R 1/16W R835,836 RK73HB1J102J CHIP R 1.0K 1/16W R415 RK73HB1J182J CHIP R 1.8K 1/16W R839 RK73HB1J000J CHIP R 1/16W K1: TK-2312 K M1: TK-2312 M P1: TK-2312 P M: TK-2317 M...
  • Page 24 RK73HB1J561J CHIP R 1/16W BD7542FVM MOS-IC R921,922 RK73HB1J473J CHIP R 1/16W TC75S51FE(F) MOS-IC R923 RK73HB1J151J CHIP R 1/16W IC301 NJM2904RB1-ZB BI-POLAR IC R924 RK73HB1J474J CHIP R 470K 1/16W K1: TK-2312 K M1: TK-2312 M P1: TK-2312 P M: TK-2317 M...
  • Page 25 Q813 RT1N141U-T111 TRANSISTOR Q814 2SB1694 TRANSISTOR Q815,816 UPA672T-A Q817 RT1N441U-T111 TRANSISTOR Q818,819 2SK3577-A Q820 2SC4617(S) TRANSISTOR Q821 2SB1694 TRANSISTOR Q822 RT1N141U-T111 TRANSISTOR TH201 ERTJ0EV104J THERMISTOR TH401 NCP18WM224J0S THERMISTOR K1: TK-2312 K M1: TK-2312 M P1: TK-2312 P M: TK-2317 M...

  • Page 26: Exploded View

    TK-2312/2317 EXPLODED VIEW TX-RX unit Parts with the exploded numbers larger than 700 are not supplied.

  • Page 27: Packing

    TK-2312/2317 PACKING (TK-2312 K, M, P) 7 Instruction manual 67 AC adapter (B62-2238-00) (W08-0989-25): K1 66 Charger 68 AC adapter (W08-0988-05): K1, M1 (W08-0992-05): M1 69 Charger 71 AC adapter (W08-1097-05): P1 (W08-1205-05): P1 704 Protection bag 50 Belt clip...
  • Page 28 TK-2312/2317 PACKING (TK-2317 M) 6 Instruction manual (B62-2237-00) 704 Protection bag 50 Belt clip (KBH-10) 48 Holder (SP/MIC) 60 Screw set 3 Cap 706 Packing fixture 707 Item carton case Parts with the exploded numbers larger than 700 are not supplied.

  • Page 29: Adjustment

    TK-2312/2317 ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifi cations Frequency Range 136 to 174MHz Standard Signal Generator (SSG) Modulation Frequency modulation and external modulation Output –127dBm/0.1µV to greater than –47dBm/1mV Input Impedance 50Ω RF Power Meter Operation Frequency...
  • Page 30 TK-2312/2317 ADJUSTMENT Frequency and Signaling Preparations for Tuning the Transceiver The transceiver has been adjusted for the frequencies Before attempting to tune the transceiver, connect the shown in the following table. When required, re-adjust them unit to a suitable power supply.
  • Page 31 TK-2312/2317 ADJUSTMENT Common Section Measurement Adjustment Item Condition Specifi cations / Remarks Test- Unit Terminal Unit Parts Method equipment 1. Setting 1) BATT terminal votage: 7.5V 2) SSG standard modulation [Wide] MOD: 1kHz, DEV: 3kHz [Narrow] MOD: 1kHz, DEV: 1.5kHz 2.
  • Page 32 TK-2312/2317 ADJUSTMENT Measurement Adjustment Item Condition Specifi cations / Remarks Test- Unit Terminal Unit Parts Method equipment 6. DQT Fine 1) TEST CH: 1 Power 0.75kHz ±40Hz Deviation Deviation meter fi lter meter [Wide] LPF: 3kHz Deviation HPF: OFF meter...
  • Page 33 TK-2312/2317 ADJUSTMENT Measurement Adjustment Item Condition Specifi cations / Remarks Test- Unit Terminal Unit Parts Method equipment 2. Open 1) TEST CH: Center, High Press [Start] Squelch (2 points) (Auto tuning) (5) [Wide] SSG otuput: –121dBm Oscilloscope (0.20µV) SSG MOD: 3.0kHz 2) TEST CH: Low (1 point) SSG otuput: –121dBm...

  • Page 34: Pc Board

    TK-2312/2317 PC BOARD TX-RX UNIT (X57-7880-20) Component side view (J79-0287-09) J79-0287-09 D819 C496 R469 R470 COM1 BPF1 COM2 COM3 COM4 SEG1 C811 SEG2 SEG3 SEG4 SEG5 R956 SEG6 D831 SEG7 R707 BATT SEG8 R703 SEG9 D830 SEG10 SEG11 BPF2 R701...
  • Page 35 TK-2312/2317 PC BOARD TX-RX UNIT (X57-7880-20) Component side view (J79-0287-09) C819 R955 R312 C307 R306 R311 D819 C945 D824 D818 L302 Q304 IC301 Q305 CP836 C311 R318 IC810 R308 Q822 R235 C831 CP837 CN801 C861 C849 R852 C843 R839 R845...
  • Page 36 TK-2312/2317 PC BOARD TX-RX UNIT (X57-7880-20) Foil side view (J79-0287-09) SIDE2 SIDE1 C256 C818 R305 D301 Q301 L221 R456 C474 C495 L418 Q407 C302 C469 C250 R458 D408 R462 C486 R213 C462 R209 L217 C484 C482 R463 C209 L420 C205...
  • Page 37 TK-2312/2317 PC BOARD TX-RX UNIT (X57-7880-20) Foil side view (J79-0287-09) J79-0287-09 SIDE2 R406 C406 C403 L410 L408 C402 D803 C455 C452 R409 R408 C447 C444 R450 R471 R445 R440 D402 C456 C464 R443 CF402 C463 C450 Q401 R444 C414 C466...

  • Page 38: Schematic Diagram

    TK-2312/2317 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7880-20) S I GN BUSY B30-2314-05 B30-2315-05 B30-1790-05 D 8 0 1 D 8 0 4 D 8 0 5 DC SW BLUE LED 2 S K 1 8 3 0 F D C S W ON:3.3V...
  • Page 39 TK-2312/2317 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7880-20) TH_DET THDET THDET AFCONT AFCONT CVIN CVIN BATT 3.3V 3.3V E E P R O M I C 8 1 0 CM_CSN CM_DTI V C C H o L D LCDBL R 9 7 8...
  • Page 40 TK-2312/2317 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7880-20) THDET THDET AFCONT CVIN BATT C P 1 100x4 5.0V 5.0V R 1 6 PL_STB PL_DAT LOIN PL_CLK PL_UL CVIN D C AMP I C 2 TC X O 3.3V 7 LD B D 7 5 4 2 F V M...

  • Page 41: Schematic Diagram

    TK-2312/2317 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7880-20) THDET 3.7V 1 5 n C 2 0 C 2 9 C 3 4 R 6 2 LOIN 2.5V 1 5 p 4 7 0 p 4 7 0 p C 7 2 C 7 3 2 S C 5 6 3 6 2.2V...
  • Page 42 TK-2312/2317 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7880-20) THDET R 2 11 R 2 1 3 D R I V E R 2 0 3 R 2 0 6 R: 0V 1 . 2 k C222 R D 0 1 M U S 1 - T 11 3 DRVOUT T:1.5V...
  • Page 43 TK-2312/2317 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7880-20) THDET F I N A L DRVOUT A N T S W R D 0 7 M U S 2 B T 11 2 A N T L 2 2 1 STRIP LINE L 2 1 2...

  • Page 44: Block Diagram

    TK-2312/2317 BLOCK DIAGRAM X57-788 B30-2337-05 D818-D821,824 2SC5636 RF BUFFER LCD BACK LIGHT PL_LE Q820 2SC4617(S) PL_DAT 33MS Q821 2SB1694 D817 MA2S111-F PL_CLK MCH3914(7)-H LCDBL LCD DRIVER SWIN D4,D6,,D8,D9 1SV323F PL_LD AK1541 D16 HVC350B LCDAT LCLD RF B LCCLK MOD2 IC821...
  • Page 45 TK-2312/2317 BLOCK DIAGRAM VHF: 136MHz~ 174MHz VHF: 185.95MHz~223.95MHz (RX) 136MHz~174MHz (TX) D17,D18 Q201 Q203 Q204 Q205 D201,D202 HVC131 2SC5636 2SC5636 HSC277 2SC5636 2SC5455-A RD01MUS1-T113 RD07MUS2BT112 D203,D204 RN142S RF BUFFER TX/RX RF AMP RF AMP PRE DRIVE DRIVE AMP FINAL AMP...

  • Page 46: Level Diagram

    TK-2312/2317 LEVEL DIAGRAM...

  • Page 47: Optional Accessories

    TK-2312/2317 OPTIONAL ACCESSORIES KNB-29N (Ni-MH Battery Pack) KNB-53N (Ni-MH Battery Pack) ■ External View ■ External View ■ Specifi cations ■ Specifi cations Voltage ......7.2V (1.2V x 6) Voltage ......7.2V (1.2V x 6) Battery capacity ..1500mAh Battery capacity ..1400mAh KNB-45L (Li-ion Battery Pack) KMC-48GPS (GPS Speaker Microphone) ■...

  • Page 48: Specifications

    Suite 2504, 25/F, Tower 2, Nina Tower, No. 8 Yeung Uk Road, Bp 58416 Villepinte, 95944 Roissy Ch De Gaulle Cedex Tsuen Wan, New Territories, Hong Kong KENWOOD House, Dwight Road, Watford, Herts., 1 Ang Mo Kio Street 63, Singapore 569110 WD18 9EB United Kingdom...

  • Page 49: Pc Board Tx-Rx Unit (X57-7880-20)

    TK-2312/2317 TK-2312/2317 PC BOARD PC BOARD TX-RX UNIT (X57-7880-20) Component side view (J79-0287-09) TX-RX UNIT (X57-7880-20) Component side view (J79-0287-09) C819 J79-0287-09 R955 R312 C307 R306 R311 D819 C945 D824 D818 C496 L302 R469 Q304 IC301 R470 COM1 BPF1 Q305...
  • Page 50 TK-2312/2317 TK-2312/2317 PC BOARD PC BOARD TX-RX UNIT (X57-7880-20) Foil side view (J79-0287-09) TX-RX UNIT (X57-7880-20) Foil side view (J79-0287-09) J79-0287-09 SIDE2 SIDE1 R406 C406 C256 C818 R305 C403 D301 L410 L408 C402 R409 R408 D803 C455 C452 R450 C447...
  • Page 51 TX-RX UNIT (X57-7880-20) BUSY S I GN TH_DET THDET THDET THDET THDET THDET THDET B30-2314-05 THDET R211 R213 D R I V E B30-2315-05 AFCONT AFCONT AFCONT R 2 0 3 R206 FINAL B30-1790-05 CVIN CVIN CVIN R 6 0 R: 0V 1.2k R D 0 1 M U S 1 - T 113...
  • Page 52 X57-788 B30-2337-05 D818-D821,824 2SC5636 VHF: 136MHz~ RF BUFFER LCD BACK LIGHT 174MHz PL_LE Q820 2SC4617(S) PL_DAT VHF: 33MS 185.95MHz~223.95MHz (RX) Q821 2SB1694 136MHz~174MHz (TX) D817 MA2S111-F PL_CLK LCDBL MCH3914(7)-H LCD DRIVER SWIN D4,D6,,D8,D9 1SV323F D17,D18 Q201 Q203 Q204 Q205 D201,D202 HVC131 PL_LD D16 HVC350B AK1541...

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Tk-2317

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