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Kenwood TK-2102G Service Manual

Vhf fm transceiver
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VHF FM TRANSCEIVER
TK-2102G
SERVICE MANUAL
GENERAL .....................................................2
SYSTEM SET-UP .........................................2
REALIGNMENT ...........................................3
DISASSEMBLY FOR REPAIR ......................5
CIRCUIT DESCRIPTION ..............................6
SEMICONDUCTOR DATA .........................10
COMPONENTS DESCRIPTION .................11
PARTS LIST ...............................................12
EXPLODED VIEW ......................................19
PACKING ....................................................20
ADJUSTMENT ..........................................21
Knob (CH)
(K29-5278-03)
Helical antenna
(T90-1036-15)
CONTENTS
© 2008-8 PRINTED IN JA PAN
B51-8841-00 ( N ) 554
Knob (VOL)
(K29-5255-03)
Plastic cabinet assy
(A02-4049-03)
TX-RX UNIT (X57-6020-10) .................26
SCHEMATIC DIAGRAM ............................30
BLOCK DIAGRAM .....................................34
LEVEL DIAGRAM ......................................36
KNB-14 (Ni-Cd BATTERY) ....................37
KNB-15A (Ni-Cd BATTERY) .................37
KNB-20N (Ni-MH BATTERY) ...............37
SPECIFICATIONS ...................BACK COVER

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Summary of Contents for Kenwood TK-2102G

  • Page 1: Table Of Contents

    VHF FM TRANSCEIVER TK-2102G SERVICE MANUAL © 2008-8 PRINTED IN JA PAN B51-8841-00 ( N ) 554 Knob (CH) (K29-5278-03) Helical antenna (T90-1036-15) Knob (VOL) (K29-5255-03) Plastic cabinet assy (A02-4049-03) CONTENTS GENERAL .............2 PC BOARD SYSTEM SET-UP .........2 TX-RX UNIT (X57-6020-10) ....26 REALIGNMENT ...........3...

  • Page 2: General

    Kenwood reserves the right to make changes to any wise, for any purpose without the prior written permission products herein at any time for improvement purposes.

  • Page 3: Realignment

    TK-2102G REALIGNMENT 1. Modes 4. PC Mode 4-1. Preface User mode The transceiver is programmed by using a personal com- PC mode Data programming mode puter, a programming interface (KPG-22/22A), USB adapter (KCT-53U) and programming software (KPG-55D (ver.4.00 or PC test mode PC tuning mode later)).
  • Page 4 TK-2102G REALIGNMENT 4-5. Programming Software Description 4-6. Programming with PC The KPG-55D (ver.4.00 or later) is the programming If data is transferred to the transceiver from a PC with software for the transceiver supplied on a CD-ROM. This the KPG-55D (ver.4.00 or later), the data for each set can be software runs under Windows 2000, XP or Vista (32-bit) on modifi...

  • Page 5: Disassembly For Repair

    TK-2102G DISASSEMBLY FOR REPAIR ■ Removing the case assembly from the chassis ■ Removing the TX-RX unit from the chassis 1. Remove the two knobs q, cushion w and three round 1. Remove the eleven screws u. nuts e. 2. Remove the VOL/CH FPC from the TX-RX unit connector 2.

  • Page 6: Circuit Description

    TK-2102G CIRCUIT DESCRIPTION The PLL circuit in the transmitter generates the neces- 1. Frequency Confi guration sary frequencies. Fig. 1 shows the frequencies. The receiver utilizes double conversion. The first IF is 38.85MHz and the second IF is 450kHz. The fi rst local oscil- lator signal is supplied from the PLL circuit.
  • Page 7 TK-2102G CIRCUIT DESCRIPTION XF200:L71-0522-05 CF200:L72-0958-05 Item Rating Item Rating Nominal center frequency 38.850MHz Nominal center frequency 450kHz Pass band width ±5.0kHz or more at 3dB 6dB band width ±6.0kHz or more 40dB stop band width ±20.0kHz or less 50dB band width ±12.5kHz or less...
  • Page 8 TK-2102G CIRCUIT DESCRIPTION 2) VCO D2 in transmit mode and D3 and D4 in receive mode). The T/R pin is set high in receive mode causing Q5 and Q7 to The operating frequency is generated by Q4 in transmit turn Q4 off, and turn Q3 on . The T/R pin is set low in trans- mode and Q3 in receive mode.

  • Page 9: Power Supply

    TK-2102G CIRCUIT DESCRIPTION 3) VCO and RF Amplifi er 4) ANT Switch and LPF The transmit signal obtained from the VCO buffer am- The RF amplifi er output signal is passed through a low- plifi er Q100, is amplifi ed by Q101. This amplifi ed signal is pass fi...

  • Page 10: Semiconductor Data

    TK-2102G SEMICONDUCTOR DATA Microprocessor: 38268MCA060GU (TX-RX unit IC403) Pin No. Port Name Function Pin No. Port Name Function VC1,VC2 Variable capacity tune control Control of power supply (5M) for everything except the microprocessor and EEPROM QT/DQT external circuit center point...

  • Page 11: Components Description

    TK-2102G COMPONENTS DESCRIPTION TX-RX unit (X57-6020-10) Ref. No. Part Name Description Ref. No. Part Name Description Phase locked loop system Q503 Transistor MIC mute/ AGC IC100 Automatic power control Q504 Transistor DC switch Variable capacitance IC200 IF system D1~4 Frequency control...

  • Page 12: Parts List

    TK-2102G PARTS LIST 2 2 0 CC45 Color* 010 = 1pF 0 = 22pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating 100 = 10pF 2 = Shape ... round, square, etc. 5 = Value 101 = 100pF Multiplier 3 = Temp.
  • Page 13 Les articles non mentionnes dans le Parts No. ne sont pas fournis. Y : AAFES (Europe) X : Australia M : Oth er Areas Teile ohne Parts No. werden nicht geliefert. TK-2102G (Y50-6410-XX) TX-RX UNIT (X57-6020-10) Desti- Desti- Ref. No.
  • Page 14 TK-2102G PARTS LIST TX-RX UNIT (X57-6020-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C110 CK73GB1C104K CHIP C 0.10UF C241 CC73GCH1H040B CHIP C 4.0PF C111,112 CK73GB1H102K CHIP C...
  • Page 15 TK-2102G PARTS LIST TX-RX UNIT (X57-6020-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C422 CK73HB1E103K CHIP C 0.010UF L8,9 L40-6891-86 SMALL FIXED INDUCTOR (6.8UH) C423 CK73GB1H102K CHIP C...
  • Page 16 TK-2102G PARTS LIST TX-RX UNIT (X57-6020-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation RK73GB2A151J CHIP R 1/10W R212 RK73GB2A330J CHIP R 1/10W RK73GB2A101J CHIP R 1/10W R213...
  • Page 17 TK-2102G PARTS LIST TX-RX UNIT (X57-6020-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R339 RK73GB2A822J CHIP R 8.2K 1/10W R527 RK73GH2A163D CHIP R 1/10W R340 RK73GH2A124D CHIP R...
  • Page 18 TK-2102G PARTS LIST TX-RX UNIT (X57-6020-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation Q105 2SK2595-E Q106 2SK1824-A Q107 DTC114TE DIGITAL TRANSISTOR Q108 DTC114EE DIGITAL TRANSISTOR Q109 DTA144EE...

  • Page 19: Exploded View

    TK-2102G EXPLODED VIEW TX-RX unit : N09-2438-05 : N14-0581-44 : N14-0804-24 D M2.6 x 6 : N30-2606-48 M2 x 3 : N79-2030-48 M2 x 5 : N83-2005-48 Parts with the exploded numbers larger than 700 are not supplied.

  • Page 20: Packing

    TK-2102G PACKING Instruction manual (B62-2103-00) 59 Charger 56 AC adapter (AC 120V) (W08-0598-15) (W08-0479-25):K 58 AC adapter (AC 230V) 30 Protection bag (W08-0558-35):M (H25-0085-04) 54 Helical antenna (T90-1036-15) 47 Screw set (N99-0396-15) Cap (SP/MIC) (B09-0351-03) 35 SP/MIC holder 60 Battery assy...

  • Page 21: Adjustment

    TK-2102G ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifi cations Frequency Range 150 to 174MHz 1. Standard Signal Generator Modulation Frequency modulation and external modulation (SSG) Output –127dBm/0.1µV to greater than –47dBm/1mV Input Impedance 50Ω 2. Power Meter...
  • Page 22 TK-2102G ADJUSTMENT Controls Preparations for tuning the transceiver Before attempting to tune the transceiver, connect the unit to a suitable power supply. Channel selector Whenever the transmitter is tuned, the unit must be con- Antenna nected to a suitable dummy load (i.e. power meter).
  • Page 23 TK-2102G ADJUSTMENT Common Section Measurement Adjustment Item Condition Specifi cations / Remarks Test- Unit Terminal Unit Parts Method equipment 1. Setting 1) BATT terminal voltage: 7.5V 2) SSG standard modulation [Wide] MOD: 1kHz, DEV: 3kHz [Narrow] MOD: 1kHz, DEV: 1.5kHz 2.
  • Page 24 TK-2102G ADJUSTMENT Measurement Adjustment Item Condition Specifi cations / Remarks Test- Unit Terminal Unit Parts Method equipment 5. MIC 1) TEST CH: Center Power TX-RX Check ±2.2kHz~3.8kHz Sensitivity AG: 1kHz/12mV meter SP/MIC PTT: ON Deviation connec- [Wide] meter Oscillo- scope...

  • Page 25: Receiver Section

    TK-2102G ADJUSTMENT Receiver Section Measurement Adjustment Item Condition Specifi cations / Remarks Test- Unit Terminal Unit Parts Method equipment 1. BPF wave 1) TEST CH: Center Spectrum TX-RX TX-RX TC201 Adjust the waveform adjust Spectrum analyzer setting analyzer as shown in Fig.1.

  • Page 26: Pc Board

    TK-2102G PC BOARD TX-RX UNIT (X57-6020-10) Component side view (J79-0166-09) R341 Q306 C332 C330 R332 C336 C411 R509 Q305 IC302 R504 R408 IC402 R404 R501 R503 R327 C500 IC400 R418 R500 C400 C415 L403 C412 R514 IC403 C409 R409 C509...
  • Page 27 TK-2102G PC BOARD TX-RX UNIT (X57-6020-10) Component side view (J79-0166-09) R341 R135 R146 MIC500 C134 C132 R136 R531 Q307 IC100 Q107 C127 C115 R542 R522 R523 R520 C517 D400 C420 R430 D401 R415 R431 R417 R414 C418 C524 R528 C520...
  • Page 28 TK-2102G PC BOARD TX-RX UNIT (X57-6020-10) Foil side view (J79-0166-09) S402 S403 MONI C532 R240 C257 C138 C261 C254 L211 R242 C262 D203 R123 C255 C259 L113 C252 C256 R239 L115 C253 R127 C128 C144 L111 R128 C126 TH100 L102...
  • Page 29 TK-2102G PC BOARD TX-RX UNIT (X57-6020-10) Foil side view (J79-0166-09) R230 C249 C213 R200 C224 R208 R210 D202 C246 R228 Q200 C223 C214 Q201 R231 R207 C250 D300 C210 R213 R204 L211 L204 C204 R203 R241 R242 C319 D203 C203...

  • Page 30: Schematic Diagram

    TK-2102G SCHEMATIC DIAGRAM TX-RX UNIT(X57-6020-10) RF AMP 2SC5108(Y)F 470p T:2.4V L77-1877-15 R:2.4V 12.8MHz T:5.0V R:4.9V 4.7u6.3 UNLOCK DETECT 0.1u MA2S111-F 8.2u 680p R:4.8V PHASE LOCKED LOOP SYSTEM 560n MB15A02PFV2E1 220n 330k 0.01u 220n T:0V TRIPLER R:4.8V 1k*4 2SC4649(N,P) R:0.7V 2nd Local...
  • Page 31 TK-2102G SCHEMATIC DIAGRAM TX-RX UNIT(X57-6020-10) VCO TX 6.8u 2SK1875-F(V) D1,2 100p FREQ. RF AMP T:0.6V T:2.5V CONTROL RF BUFFER AMP Q100 R:0V R:2.5V 2SC5108(Y)F C103 2SC5108(Y)F C100 6.8u 0.5p R:0V T:0.4V DC SW TX MODULATION 2SJ243-A DC SW 100k VCO RX...
  • Page 32 TK-2102G SCHEMATIC DIAGRAM TX-RX UNIT(X57-6020-10) TX FINAL Q105 T:0.6V TX DRIVE 2SK2595-E R:0V Q102 T:1.1V T:0.7V 2SK2596-E R118 C116 L107 R:0V R:0V R107 C108 R112 C109 L103 1000p T:2.2V T:2.9V 3.9k 1000p R:1.0V R:0V RF SW D100 C104 T:7.3V Q101...
  • Page 33 TK-2102G SCHEMATIC DIAGRAM TX-RX UNIT(X57-6020-10) D101,104 ANTENNA SW D104 C140 C144 C147 HSC277 C131 L110 L111 D101 C137 L114 L115 L117 1000p HSC277 1000p R:0V T:7.3V T:0.8V R:0V R:0.1V T:1.7V R123 D102,103 ANTENNA SW R144 DC SW R136 Q106 150k(D)

  • Page 34: Block Diagram

    TK-2102G BLOCK DIAGRAM 1SV214 2SC5108 (Y)F 2SK1875 2SC5108 2SC5 -F(V) (Y)F D1,D2 1SV283F MB15A02PFV2E1 Q5,Q7 D3,D4 2SJ243 1SV283F 2SK1875 -F(V) L77-1877 UMC4 Q403 144EE IC403 38268MCA060GU IC200 TA31136FNG 2SC4649 (N,P) IC401 AT24CO8A 10SU18 IC402 IC400 NJM2904V-ZB R3111N BD4840G 451C-F D300...
  • Page 35 TK-2102G BLOCK DIAGRAM D101 Q100 Q101 Q102 Q105 D104 2SC5108 2SC4988 2SK2596 2SK2595 HSC277 (Y)F Q8,D6 2SC4617 MA2S111 IC100 NJM2904 V-ZB Q104 Q103 UFMMT717 2SK1824 Q106 2SK1824 Q108 114EE Q107 114EE Q201 Q202 Q203 2SC4649 3SK318 3SK318 (N,P) L203,L214 L208,L209,...

  • Page 36: Level Diagram

    TK-2102G LEVEL DIAGRAM...

  • Page 37: Optional Accessories

    TK-2102G OPTIONAL ACCESSORIES KNB-14 (Ni-Cd BATTERY) ■ External View ■ Schematic Diagram ■ Specifi cations Discharge pin side Voltage : 7.2V (1.2V x 6) Capacity : 600mAh Dimensions : 60.8W x 110.8H x 17.3D (mm) Breaker Breaker (projections included) (70±5 °...

  • Page 38: Specifications

    Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Bp 58416 Villepinte, 95944 Roissy Ch De Gaulle Cedex Kwai Fong, N.T., Hong Kong KENWOOD House, Dwight Road, Watford, Herts., 1 Ang Mo Kio Street 63, Singapore 569110 WD18 9EB United Kingdom...
  • Page 39 TK-2102G TK-2102G PC BOARD PC BOARD TX-RX UNIT (X57-6020-10) Component side view (J79-0166-09) TX-RX UNIT (X57-6020-10) Component side view (J79-0166-09) Q306 R341 C332 R135 R146 MIC500 C134 C132 C330 R332 C336 R136 C411 R531 Q307 R509 Q305 IC302 IC100 R504...
  • Page 40 TK-2102G TK-2102G PC BOARD PC BOARD TX-RX UNIT (X57-6020-10) Foil side view (J79-0166-09) TX-RX UNIT (X57-6020-10) Foil side view (J79-0166-09) S402 S403 MONI R230 C249 C213 C224 R200 R208 D202 R210 C246 R228 C532 Q200 R231 C223 C214 Q201 R207...
  • Page 41 TX-RX UNIT(X57-6020-10) D101,104 RF AMP ANTENNA SW 2SC5108(Y)F D104 C140 C144 C147 TX FINAL 470p Q105 HSC277 TX DRIVE T:0.6V 2SK2595-E L110 L111 C131 D101 C137 L114 L115 L117 VCO TX R:0V 6.8u T:1.1V T:0.7V Q102 2SK2596-E R118 C116 L107 1000p HSC277 1000p...
  • Page 42 1SV214 2SC5108 (Y)F D101 Q100 Q101 Q102 Q105 2SK1875 2SC5108 2SC5108 2SC4988 D104 2SK2596 2SK2595 HSC277 -F(V) (Y)F (Y)F D1,D2 1SV283F MB15A02PFV2E1 Q8,D6 Q5,Q7 D3,D4 2SC4617 2SJ243 1SV283F 2SK1875 -F(V) MA2S111 L77-1877 UMC4 IC100 NJM2904 V-ZB Q403 144EE Q104 Q103 UFMMT717 2SK1824 Q106...

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