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SERVICE
MANUAL
VHF FM TRANSCEIVER
S-13815IZ-C1
1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan © 2002 Icom Inc.
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DANGER INTRODUCTION This service manual describes the latest service information NEVER connect the transceiver to an AC outlet or to a DC for the IC-V8000 VHF FM TRANSCEIVER at the time of pub- power supply that uses more than 16 V. This will ruin the lication. transceiver. VERSION SYMBOL SUPPLIED MICROPHONE DO NOT expose the transceiver to rain, snow or any liquids. Asia SEA HM-118N DO NOT reverse the polarities of the power supply when CSA HM-118TN C.S.America connecting the transceiver. CSA-1
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TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 4-2 TRANSMITTER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2 4-3 PLL CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SECTION 1 SPECIFICATIONS Ô Ô GENERAL • Frequency coverage : Version Receive Transmit [USA] 144.000–148.000 MHz [SEA] 136.000–174.000 MHz* 140.000–150.000 MHz* [CSA] 136.000–174.000 MHz* *Specifications Guaranteed: 144–148 MHz only • Type of emission : FM (F2D / F3E) • Frequency stability : ± 10 ppm (–10˚C to +60˚C; +14˚F to +140˚F) • Tuning steps : 5, 10, 12.5, 15, 20, 25, 30 or 50 kHz • Antnna connector : SO-239 (50 Ω) • Power supply requirement : 13.8 V DC (Operable voltage range: 11.7 to 15.
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SECTION 2 INSIDE VIEWS • MAIN UNIT AF power amplifier (Q23: RD70HVF1) Antenna switching circuit (D12, D27: XB15A407, D19: XB15A308, D16: HVU131TRF) VCO circuit 2nd IF filter (FI1: CFWS450F, FI2: CFWS450HT) Reference oscillator 1st IF filter (X1: CR-659) (FI3, FI4: FL-310) • LOGIC BOARD System clock CPU (X1: CR-663) (IC7: HD6433876B53H) EEPROM (IC5: HN58X2432TI) Speaker Reset IC LOGIC board (IC4: S-80942ANMP-DD6) 2 - 1
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SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS • REMOVING THE COVER • REMOVING THE MAIN UNIT 1 Unscrew 4 screws, MP10. 1 Unscrew 11 screws, MP6, and 2 screws, MP7, and 2 screws, MP4. 2 Remove the cover in the direction of the arrow. 2 Unsolder 3 points, A, to remove the antenna connector. 3 Remove the Main unit in the direction of the arrow. Cover MP10 MP7 MP4 MP6 MP6 J1 A Main unit Chassis • REMOVING THE FRONT PANEL • OPTIONAL UNIT INSTALLATION 1 Unscrew 3 screws, MP9. 1 Install the optional uni
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SECTION 4 CIRCUIT DESCRIPTION The signals from the RF circuit are mixed at the 1st mixer 4-1 RECEIVER CIRCUITS (Q19) with a 1st LO signal coming from the VCO circuit to 4-1-1 ANTENNA SWITCHING CIRCUIT produce a 21.70 MHz 1st IF signal. (MAIN UNIT) The 1st IF signal is applied to two crystal filters (FI3 and FI4) Received signals passed through the low-pass filter (L44, to suppress out-of-band signals. The filtered 1st IF signal is L47, L48, L51, C190, C197, C203, C208, C210, C217, applied to the
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The AF signals are applied to the AF power amplifier circuit 4-2-2 MODULATION CIRCUIT (MAIN UNIT) (IC9, pin 1) to obtain the specified audio level. The amplified The modulation circuit modulates the VCO oscillating signal AF signals, output from pin 4, are applied to the internal (RF signal) using the microphone audio signals. speaker (CHASSIS UNIT; SP1) via the speaker jack (J6) when no plug is connected to the external speaker jack (J1). The audio signals (SHIFT) change the reactance of D2 to
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4-4 POWER SUPPLY CIRCUITS 4-3 PLL CIRCUITS VOLTAGE LINE 4-3-1 PLL CIRCUIT (MAIN AND LOGIC UNITS) A PLL circuit provides stable oscillation of the transmit fre- LINE DESCRIPTION quency and receive 1st LO frequency. The PLL output com- The voltage from the power supply. HV pares the phase of the divided VCO frequency to the refer- ence frequency. The PLL output frequency is controlled by The same voltage as HV line which is controlled the divided ratio (N-data) of a programmable divider. by the HV
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4-5 PORT ALLOCATIONS 4-5-1 CPU (LOGIC UNIT: IC7) Pin Port Pin Port Description Description number name number name Input port for the weather alert signal Outputs EEPROM (LOGIC unit; IC5, 1 DETO 54 ESCK detection. pin 6) clock signal. 9 RESET Input port for reset signal. I/O port for the data signals from/to the 55 ESDA EEPROM (LOGIC unit; IC5, pin 5). Outputs reference oscillator for the 11 CSHIFT CPU control signal. SEG1– 56–88 Output LCD driver signals. SEG32 Outputs serial clock signal to th
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4-5-2 D/A CONVERTOR IC (MAIN UNIT: IC5) Pin Port Description number name Outputs transmit devetion control sig- 2 MOD nal. 3 SQLATT Outputs attenuator control signal. • Outputs tunable bandpass filter con- trol signal while receiving. 10 T1 • Outputs TX power control signal while transmitting. Output tunable bandpass filter control 11, 23 T2, T3 signals. 14 SQLIN Outputs squelch control signal. Outputs DTCS’s gradient control sig- 15 DTC nal. Outputs reference frequency control 22 FC signal to X
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SECTION 5 PARTS LIST [LOGIC BOARD] [LOGIC BOARD] REF ORDER REF ORDER DESCRIPTION DESCRIPTION NO. NO. NO. NO. IC1 1110002860 S.IC TA75S393F (TE85R) R36 7030003570 S.RESISTOR ERJ3GEYJ 123 V (12 kΩ) IC2 1130004200 S.IC TC4S66F (TE85R) R37 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) IC3 1110005340 S.IC NJM12902V-TE1 R38 7030003400 S.RESISTOR ERJ3GEYJ 471 V (470 Ω) IC4 1130009110 S.IC S-80942ANMP-DD6-T2 R39 7030003700 S.RESISTOR ERJ3GEYJ 154 V (150 kΩ) IC5 1130009680 S.IC HN58X2432TI R40 703000
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[LOGIC BOARD] [LOGIC BOARD] REF ORDER REF ORDER DESCRIPTION DESCRIPTION NO. NO. NO. NO. C5 4030007090 S.CERAMIC C1608 CH 1H 470J-T-A S9 2250000370 ENCODER EVQ-VENF0124B C7 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C8 4030006900 S.CERAMIC C1608 JB 1H 103K-T-A C9 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A SP1 2510001150 SPEAKER 045P0804 C10 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C11 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C13 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A WS1 8600036880 FX2509
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[MAIN UNIT] [MAIN UNIT] REF ORDER REF ORDER DESCRIPTION DESCRIPTION NO. NO. NO. NO. D10 1750000710 S.VARICAP HVC350BTRF R3 7030003760 S.RESISTOR ERJ3GEYJ 474 V (470 kΩ) D11 1750000710 S.VARICAP HVC350BTRF R4 7030003300 S.RESISTOR ERJ3GEYJ 680 V (68 Ω) D12 1710001060 DIODE XB15A407 R5 7030003520 S.RESISTOR ERJ3GEYJ 472 V (4.7 kΩ) D13 1750000710 S.VARICAP HVC350BTRF R6 7030003420 S.RESISTOR ERJ3GEYJ 681 V (680 Ω) D14 1790000980 S.DIODE MA742 (TX) R7 7510001280 S.THERMISTOR NTCCM20124AG473J-T D
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[MAIN UNIT] [MAIN UNIT] REF ORDER REF ORDER DESCRIPTION DESCRIPTION NO. NO. NO. NO. R101 7030003720 S.RESISTOR ERJ3GEYJ 224 V (220 kΩ) C11 4550006250 S.TANTALUM TEMSVA 1A 106M-8L R103 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) C12 4550006760 S.TANTALUM TEMSVB2 1A 336M-8R R104 7030003740 S.RESISTOR ERJ3GEYJ 334 V (330 kΩ) C13 4030007110 S.CERAMIC C1608 CH 1H 680J-T-A R105 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) C14 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A R106 7030003560 S.RESISTOR ERJ3
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[MAIN UNIT] [MAIN UNIT] REF ORDER REF ORDER DESCRIPTION DESCRIPTION NO. NO. NO. NO. C105 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C200 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C106 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C201 4030007040 S.CERAMIC C1608 CH 1H 180J-T-A C108 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C203 4030017980 S.CERAMIC ERF22X 6C2H 470J D01L C109 4030006900 S.CERAMIC C1608 JB 1H 103K-T-A C204 4510006260 S.ELECTROLYTIC ECEV1AA471UP C111 4030009990 S.CERAMIC C1608 CH 1H 200J
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SECTION 6 MECHANICAL PARTS AND DISASSEMBLY 6-1 IC-V8000 [ACCESSORIES] [CHASSIS PARTS] REF. NO. ORDER NO. QTY. DESCRIPTION REF. NO. ORDER NO. DESCRIPTION QTY. F1 5210000080 Fuse (20A) 1 J1 6510004880 Connector MR-DSE-01 1 MC1 0880001060 Microphone HM-133 ACC [CSA-1], [USA-2] 1 MF1 2710000720 Fan DF125020BH 1 0800005740 Microphone HM-118TN ACC [CSA] 1 0800005820 Microphone HM-118N ACC [SEA] 1 MP1 8010018801 2509 Chassis-1 1 0800005720 Microphone HM-118T
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DANGER INTRODUCTION This service manual describes the latest service information NEVER connect the transceiver to an AC outlet or to a DC for the IC-V8000 VHF FM TRANSCEIVER at the time of pub- power supply that uses more than 16 V. This will ruin the lication. transceiver. To upgrade quality, any electrical or mechanical parts and DO NOT expose the transceiver to rain, snow or any liquids. internal circuits are subject to change without notice or obligation. DO NOT reverse the polarities of the
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SERVICE MANUAL VHF FM TRANSCEIVER S-13815IZ-C1 1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan © 2002 Icom Inc.
