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Icom IC-V82 Service Manual

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Summary of Contents for Icom IC-V82

  • Page 1 iC-v82...

  • Page 3: Table Of Contents

    UT-118 PORT ALLOCATIONS ..................4 - 6 SECTION 5 ADJUSTMENT PROCEDURES 5 - 1 PREPARATION ........................ 5 - 1 5 - 2 IC-V82 ADJUSTMEN ......................5 - 2 5 - 3 UT-118 ADJUSTMENT ....................5 - 6 SECTION 6 PARTS LIST SECTION 7...
  • Page 4 : 50 Ω (BNC Type) • Antenna impedance • Power supply requirement : Specified Icom's battery pack only (Operating voltage range; 6.0–10.3 V) • Number of memory channels : 207 channels (Including 6 scan edges and 1 call channel) • Scan types : Program/Memory/Skip/Priority/Tone scans •...

  • Page 5: Inside Views

    SECTION 2 INSIDE VIEWS • MAIN UNIT Top view Bottom view TX drive amplifier Power amplifier (Q2: RD01MUS1) (Q1: RD12MVS1) 1st IF mixer Pre-emphasis circuit (Q13: 3SK318YB) (IC3: LMV324IPWR) RF amplifier Antenna switch (Q12: 3SK318YB) (D2: MA77) CPU5 regulator (IC12: S-812C50AMC) FM IF IC (IC2: TA31136FN) IF amplifier...
  • Page 6 SECTION 3 DISASSEMBLY INSTRUCTIONS 1. Removing the chassis panel 2. Removing the MAIN unit. q Remove the knob A and jack cap B . q Remove the Jack seal F. w Unscrew 1 nut C. w Unsolder 4 points G of the shield cover. e Unscrew 2 screws D (2 ×...

  • Page 7: Circuit Description

    SECTION 4 CIRCUIT DESCRIPTION The 1st IF signal from the 1st mixer is passed through the 4-1 RECEIVER CIRCUITS crystal filter (FI1) to suppress unwanted signals, and the 4-1-1 ANTENNA SWITCHING CIRCUIT limiter (D63) and then applied to the 1st IF amplifier (Q14). The antenna switching circuit toggles receive line and transmit line.

  • Page 8: Transmitter Circuits

    4-1-6 SQUELCH CIRCUIT The signals from the pre-emphasis circuit are passed through the analog switch (IC4, pins 3, 4) and LPF (IC3, Squelch circuit mutes AF output signal when no signals are pins 13, 14). The signals from the LPF are passed through received.

  • Page 9: Pll Circuits

    4-3-3 RECEIVE LOOP 4-3 PLL CIRCUITS The generated 1st LO signal is applied to the PLL IC (IC19, 4-3-1 GENERAL pin 8) via the buffer-amplifiers (Q5, Q75) and is divided at PLL circuits control the VCO circuit. IC19 is a PLL IC and the prescaler section and the programmable divider section, contains prescaler, programmable counter, programmable then applied to the phase detector section.

  • Page 10: Power Supply Circuits

    4-5 POWER SUPPLY CIRCUITS PORT DESCRIPTION 4-5-1 VOLTAGE LINES NUMBER NAME LINE DESCRIPTION NOIS Input port for "NOIS" signal. The voltage from the attached battery pack. ESDA I/O port for EEPROM (IC7). Common 5 V for the CPU (IC8) converted from the Outputs clock signal for EEPROM ESCK CPU5...
  • Page 11 PORT DESCRIPTION NUMBER NAME PLLSTB Outputs PLL strobe signal. Outputs AF regulator (Q15, Q16) control signal. AFON HIGH : While emitting audio Outputs LPF cut-off frequency control signal to the CTCSS switch (Q38). DUSE LOW : When CTCSS or no signal- ing system is in use.

  • Page 12: Ut-118 Circuit Description

    The level converter circuit (Q305 and Q306) converts communication data level between the CPU (IC204) and the connected transceiver’s CPU. Q301, Q302 and Q303 convert control signals level between the UT-118 and the IC-V82. • UT-118 BLOCK DIAGRAM -"TXD_2" signal to "DMOD" signal...

  • Page 13: Adjustment Procedures

    RF power meter 0.1–20 W/50 Ω • JIG (GND) To [MIC] jack Frequency 68 kΩ counter To [SP] jack 3-conductor 3.5 (d) mm ( 1 /8”) plug (CLONE) IC-V82 • ADJUSTMENT MODE DISPLAY Operating frequency Adjustment item 5 - 1...

  • Page 14: Ic-V82 Adjustmen

    5-2 IC-V82 ADJUSTMENT 5-2-1 KEY OPERATION FOR THE ADJUSTMENT • Rotate [VOL] to adjust the value. • Push [D•CLR] key to store the adjustment value and move to next adjustment item. • Push [ ]/[ ] key to move to next adjustment item without changing the value.
  • Page 15 5-2-3 RECEIVE ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION OPERATION SENSITIVITY 1 • Connect an SSG to the antenna • Push [D•CLR] key. connector and set as; Frequency : 136.020 MHz Level : 0 dBµ* Modulation : 1 kHz Deviation : ± 3.5 kHz •...

  • Page 16: Ut-118 Adjustment

    5-3 UT-118 ADJUSTMENT • CONNECTION (BOTTOM VIEW) Power supply 5.0 V DC / 1 A Power supply 8.0 V DC / 1 A J301, Pin 14 Entering adjustment mode • ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION OPERATION ENTERING • Connect the pin 14 of J301 to GND to enter the adjustment mode. ADJUSTMENT MODE CODEC...

  • Page 17: Parts List

    SECTION 6 PARTS LIST 6-1 IC-V82 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 1790000660 S.DIO MA728 (TX) 114.2/3.3 1110003490 S.IC TA31136FN (D,EL) 101.7/33.7 1750000940 S.DIO 1SS400 TE61 13.6/41.9 1110006470 S.IC LMV324IPWR 103.7/13.2 1750000770 S.VCP HVC376BTRF 33.5/9.8 1130011770 S.IC CD4066BPWR 84.9/14.9...
  • Page 18 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 7030005530 S.RES ERJ2GEJ 100 X (10 Ω) 107.6/7.3 R259 7030005110 S.RES ERJ2GEJ 224 X (220 kΩ) 103.6/2.9 7030005110 S.RES ERJ2GEJ 224 X (220 kΩ) 103.6/6.1 R260 7030005220 S.RES ERJ2GEJ 223 X (22 kΩ) 109.7/34 7030005110 S.RES ERJ2GEJ 224 X (220 kΩ) 101.1/4.1...
  • Page 19 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 4030017680 S.CER ECJ0EC1H820J 101.7/4.4 R457 7030005050 S.RES ERJ2GEJ 103 X (10 kΩ) 75.8/37.6 4030017340 S.CER ECJ0EC1H010B 102.7/4.2 R458 7030005050 S.RES ERJ2GEJ 103 X (10 kΩ) 77.3/36.9 4030017460 S.CER ECJ0EB1E102K 92.2/16.9 R459 7030005050 S.RES ERJ2GEJ 103 X (10 kΩ) 74.7/36.5...
  • Page 20 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION C298 4550005980 S.TAN TEESVA 1A 475M8L 109.9/18.4 C487 4030017420 S.CER ECJ0EC1H470J 83.6/36.7 C299 4030017730 S.CER ECJ0EB1E471K 93.7/3 C488 4030017730 S.CER ECJ0EB1E471K 85.4/36.7 C300 4030017460 S.CER ECJ0EB1E102K 84.7/29.9 C489 4030017460 S.CER ECJ0EB1E102K 91.4/27.9 C301 4030017460 S.CER ECJ0EB1E102K...
  • Page 21 6-2 OPTIONAL UNIT UT-118 [MAIN UNIT] ORDER [MAIN UNIT] DESCRIPTION LOCATION ORDER DESCRIPTION R269 7030005060 S.RES ERJ2GEJ 333 X (33 kΩ) 15.9/8.7 LOCATION R270 7030005240 S.RES ERJ2GEJ 473 X (47 kΩ) 28.5/1.6 1180002390 S.REG S-812C33AMC-C2N-T2 3.4/27.9 7030004980 S.RES ERJ2GEJ 101 X (100 Ω) R308 1.8/16.9 1180002370 S.REG R1111N321B-TR...
  • Page 22 SECTION 7 MECHANICAL PARTS AND DISASSEMBLY [CHASSIS PARTS] [MAIN UNIT] REF. NO. ORDER NO. DESCRIPTION QTY. REF. NO. ORDER NO. DESCRIPTION QTY. 6510022460 Connector BNC-R162 5030002800 LCD A01B001X 2510001280 Speaker SDRS-3650P-008A 8510016470 2775 VCO case 8510016470 2775 VCO cover 8900009640 Cable OPC-963 8210021280 2826 reflector...
  • Page 23 7 - 2...
  • Page 24 SECTION 8 SEMICONDUCTOR INFORMATION •TRANSISTORS AND FETS •DIODES 2SC4116BL HVC375BTRF 2SA1576S 2SA1576A 2SB1132R 2SC4617 TLS 1SV286 1SV308 MA2S30400L 1SS400 (Symbol: (Symbol: (Symbol: (Symbol: (Symbol: BAR) (Symbol: (Symbol: (Symbol: (Symbol: BAR) (Symbol: 2SK1069-4 3SK299-U73 MA2S077 MA728 2SC5006-T1 2SC5085Y 2SC5231 C8 DA221 TL MA742 HVU131TRF (Symbol:...
  • Page 25 SECTION 9 BOARD LAYOUTS MAIN UNIT • TOP VIEW The combination of this page and next page shows the unit layout in the same configuration as the actual P.C. Board. H100 H105 H110 H115 H120 H125 S801 ENCODER BATT ANTENNA EXT.
  • Page 26 • BOTTOM VIEW To Optional unit J301 The combination of this page and previous page shows the unit layout in the same configuration as the actual P.C. Board. H125 H120 H115 H110 H105 H100 MICROPHONE MIC GND 9 - 2...

  • Page 27: Block Diagram

    SECTION 10 BLOCK DIAGRAM • MAIN UNIT D64, D72: 1SS400 Q34: 2SK1069 UNLK UNLOCK LVIN ANTENNA Tx: 136.000–174.000 MHz D59, D60: MA2S304 IC16: SN74AHC2C53HDCT Rx: 182.350–220.350 MHz D61: 1SV286 D1: HVU131TRF X4: CR-783 D3: 1SV308 IC23: IC19: MB15E03SL Q76: 2SC5231 Q3: 2SC5085 Q2: RD12MUS1 Q1: RD12MVS1...

  • Page 28: Voltage Diagram

    SECTION 11 VOLTAGE DIAGRAM • MAIN UNIT 11 - 1...
  • Page 29 PLLSW PSVCO PSVCO RX: 0.00V PSVCO 4.80V R160 SW5V SW5V SW5V TX: 4.80V XP4601 2.55V R337 R439 R438 C518 R422 EXCCL3225U1 C489 R505 R441 4.02V R433 1.5M 0.001 C443 C441 0.001 2.2M 2.81V 0.001 C459 0.001 C429 IC19 C449 0.001 R426 0.001 MB15E03SLPFV1...

  • Page 30: Ut-118 Digital Unit (Optional Unit)

    SECTION 12 UT-118 DIGITAL UNIT (OPTIONAL UNIT) 12-1 UT-118 BOARD LAYOUT • TOP VIEW • BOTTOM VIEW J301 PTTIN PTTOUT MICOUT VCC_8V MICIN — 232TX — BUSY 232RX — RXMUTE SICO FMDET OPT1 AFOUT OPT2 REFMOD OPT3 — OPV3 OPSO OPV2 OPV1 OPSCK...

  • Page 31: Ut-118 Semiconducter Information

    12-3 UT-118 BLOCK DIAGRAM 12-2 UT-118 SEMICONDUCTOR INFORMATION • TRANSISTORS AND FET’S 2SA1586 GR DTC144EUA T106 XP4312 (Symbol: SG) (Symbol: 26_) (Symbol: 7T) • DIODES MA2S728 MA2S111 (Symbol: A) (Symbol: B) 12 - 2...

  • Page 32: Ut-118 Voltage Diagram

    12-4 UT-118 VOLTAGE DIAGRAM 3.3V L201 1µ 3.3V 3.3V 3.3V APWR APWR 3.3V IC203 X201 S-80928CNMC CR-760 4.0-8.5V 3.2V S-812C33AMC-C2N-T2 R1111N321B (9.8304 MHz) PSAVE ON: L(0.0V) VOUT VOUT PSAVE OFF: H(3.3V) R209 R400 100k PSAVE ON: L(0.0V) AEPR Q401 PSAVE OFF: H(3.3V) Q400 R401 DTC144EU...

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