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Sony ICB-U655 Service Manual
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Sony ICB-U655 Service Manual

Sony ICB-U655 Service Manual

Sony icb-u655 frs two-way radio
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See also: Operating Instructions
ICB-U655
SERVICE MANUAL
US Model
Ver 1.1 1999. 05
Photo: Yellow model
SPECIFICATIONS
FRS TWO-WAY RADIO
MICROFILM

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  • Page 1 ICB-U655 SERVICE MANUAL US Model Ver 1.1 1999. 05 Photo: Yellow model SPECIFICATIONS FRS TWO-WAY RADIO MICROFILM...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Flexible Circuit Board Repairing • Keep the temperature of the soldering iron around 270 ˚C dur- ing repairing. SERVICING NOTES ..........3 • Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). GENERAL •...

  • Page 3: Servicing Notes

    Always perform the following treatment when the Cabinet was removed, or the Contact Board (ANT) Assembly was removed during repair. 1. Apply SONY Grease SGL-505 (7-662-010-04) to entire sur- face of Cabinet Rear Assembly marked with using a swab. (See Fig. A) 2.

  • Page 4: General

    SECTION 2 This section is extracted from instruction manual. GENERAL – 4 –...
  • Page 5 – 5 –...

  • Page 6: Disassembly

    SECTION 3 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. CABINET (FRONT) ASSY 1 clip 4 special screw (2 × 8) 8 cabinet (front) assy 3 lid battery case 7 cover (guard) 6 two screws (1.7 × 5) 5 four special screws (2 ×...

  • Page 7: Electrical Adjustments

    SECTION 4 ELECTRICAL ADJUSTMENTS Tone Modulation and Modulation Sensitivity 0 dBm=0.775 V Adjustments Carrier Frequency of each channel Setting: (Frequency intervals are 25 kHz at each channel, but the interval resistor network AF oscillator between 7ch and 8ch is 4.85 MHz) PTT switch ON: Transmit 1ch : 462.5625 MHz...
  • Page 8 Squelch Adjustment Adjustment Location: Setting: – RF BOARD (Side A) – Carrier frequency: 467.5625 MHz (8ch) FM RF SSG RF board TP (ANT2) TP (GND) Procedure: 1. Turn the power ON, and set to 8ch. [MODE] 2. Press the button (S105) on the MICRO COMPUTER board to set the basic mode.

  • Page 9: Diagrams

    ICB-U655 SECTION 5 DIAGRAMS 5-1. BLOCK DIAGRAM 450kHz ANT1 (ANTENNA) 2nd MIX, 3rd IF AMP, DET RV106 RV104 CTCSS ENCODER/DECODER IC109 TONE 462MHz to 468MHz MODULATION SWITCH 21.7MHz 450kHz AUDIO IN RX AUDIO OUT LOW PASS RF AMP B.P.F. 1st IF...

  • Page 11: 5-3. Schematic Diagram

    ICB-U655 5-3. SCHEMATIC DIAGRAM • See page 19 for Waveforms. • See page 20 for IC Block Diagrams. – 15 – – 16 – – 17 – – 18 –...

  • Page 12: Ic Pin Function Description

    • Waveforms • IC Block Diagrams 5-4. IC PIN FUNCTION DESCRIPTION – RF Board – – MICRO COMPUTER Board – – RF Board – – MICRO COMPUTER Board – • MICRO COMPUTER BOARD IC101 µPD753012AGC-F00-3B9 (SYSTEM CONTROLLER) IC1 µPC2757T-E3 IC2 TA31136FN IC102 NJM2070M 1 IC2 1 (OSC IN) (TX mode) 3 IC109 2 (XTAL) (TX mode)
  • Page 13 Pin No. Pin Name Description TONE DET Tone detection signal input from the CTCSS encoder/decoder (IC109) TEST Not used (open) V1-IN Battery detection signal input terminal V2-DET Voltage detection signal input terminal System reset signal input from the reset signal generator (IC104) “L”: reset RESET “L”...

  • Page 14: Exploded Views

    SECTION 6 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they are seldom required for routine service. Some may have some difference from the original one. delay should be anticipated when ordering •...
  • Page 15 Ver 1.1 1999. 05 (2) CHASSIS SECTION not supplied (RF board) LCD101 not supplied not supplied (MICRO COMPUTER board) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-907-107-01 PACKING (MIC) 3-037-796-01 CUSHION (CR T1) 3-939-940-01 CASE * 59 A-3638-725-A CHASSIS ASSY (Including MICRO COMPUTER 1-694-160-11 CONDUCTIVE BOARD, CONNECTION...

  • Page 16: Electrical Parts List

    Ver 1.1 1999. 05 SECTION 7 MICRO COMPUTER ELECTRICAL PARTS LIST NOTE: When indicating parts by reference • Due to standardization, replacements in the • Items marked “*” are not stocked since they number, please include the board. parts list may be different from the parts speci- are seldom required for routine service.
  • Page 17 MICRO COMPUTER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < IC > R105 1-216-841-11 METAL CHIP 1/16W IC101 8-759-589-60 IC uPD753012AGC-F00-3B9 R106 1-216-825-11 METAL CHIP 2.2K 1/16W IC102 8-759-046-84 IC NJM2070M R107 1-216-833-11 METAL CHIP 1/16W IC103 8-759-701-01 IC NJM2904M...
  • Page 18 Ver 1.1 1999. 05 MICRO COMPUTER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R188 1-216-825-11 METAL CHIP 2.2K 1/16W X102 1-567-098-41 VIBRATOR, CRYSTAL (32.768kHz) R189 1-216-817-11 METAL CHIP 1/16W X103 1-760-158-11 VIBRATOR, CERAMIC (1MHz) R190 1-216-825-11 METAL CHIP 2.2K 1/16W...
  • Page 19 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-162-964-11 CERAMIC CHIP 0.001uF 1-414-733-21 INDUCTOR 100nH 1-162-911-11 CERAMIC CHIP 0.5PF 1-414-733-21 INDUCTOR 100nH 1-162-927-11 CERAMIC CHIP 100PF 1-414-733-21 INDUCTOR 100nH 1-162-964-11 CERAMIC CHIP 0.001uF 1-414-733-21 INDUCTOR 100nH 1-162-919-11 CERAMIC CHIP 22PF 1-414-722-11 INDUCTOR...
  • Page 20 ICB-U655 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-799-11 METAL CHIP 1/16W 1-216-813-11 METAL CHIP 1/16W 1-216-843-11 METAL CHIP 1/16W 1-216-801-11 METAL CHIP 1/16W 1-216-805-11 METAL CHIP 1/16W 1-216-805-11 METAL CHIP 1/16W 1-216-801-11 METAL CHIP...

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