Sony ICF-C795RC Service Manual
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Sony ICF-C795RC Service Manual

Sony ICF-C795RC Service Manual

Fm/am radio controlled clock radio
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Download this manual See also: Operating Instructions
ICF-C795RC
SERVICE MANUAL
AEP Model
Ver 1.0 1999. 08
SPECIFICATIONS
FM/AM RADIO CONTROLLED CLOCK RADIO
MICROFILM

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Summary of Contents for Sony ICF-C795RC

  • Page 1 ICF-C795RC SERVICE MANUAL AEP Model Ver 1.0 1999. 08 SPECIFICATIONS FM/AM RADIO CONTROLLED CLOCK RADIO MICROFILM...

  • Page 2: Table Of Contents

    LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY.

  • Page 3: General

    SECTION 1 This section is extracted from instruction manual. GENERAL – 3 –...
  • Page 4 – 4 –...

  • Page 5: Disassembly

    SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. CHASSIS ASSY 1 four screws (P3 × 14) 3 rear cabinet 4 connector (CN301) 7 chassis assy 5 Break the soldering of speaker lead. 6 button (DST) 2 claw 6 knob (brightness) 1 screw (P3 ×...
  • Page 6 BOX (UPPER) , ANTENNA 3 box (upper), antenna 2 claw 1 three screws 2 claw ANTENNA CORD SETTING Set the antenna cord as illustrated below, then install the antenna box. box (lower), antenna antenna, ferrite-rod antenna cord coil lead – 6 –...

  • Page 7: Electrical Adjustments

    SECTION 3 ELECTRICAL ADJUSTMENTS 0 dB = 1 µV AM IF ADJUSTMENT [AM] Adjust for a maximum reading on level meter. Setting: 450 kHz Band switch: AM MAIN board AM VCO VOLTAGE ADJUSTMENT Put the lead-wire TP (SP +) AM RF signal antenna close to Adjustment Part Frequency Display Reading on Digital Voltmeter...
  • Page 8 Adjustment Location: – MAIN BOARD (Component Side) – – MAIN BOARD (Conductor Side) – L5 AM VCO Voltage Adjustment L4 FM VCO Voltage Adjustment TP (SP+) TP (VT) TP (SP GND) TP (FM GND) TP (FM-IN) AM IF Adjustment TC1 AM Tracking Adjustment AM Tracking Adjustment FM Tracking Adjustment ANTENNA SECTION...

  • Page 9: Diagrams

    ICF-C795RC SECTION 4 DIAGRAMS 4-1. BLOCK DIAGRAM • Circuit Boards Location L3, TC3 FM TRACKING • SIGNAL PATH FM RF MAIN KEY board 10.7MHz : FM FM/AM FRONT-END, ANT1 FM/AM IF AMP, DET, AGC, AF AMP : AM FM LEAD...

  • Page 10: Schematic Diagram

    ICF-C795RC 4-2. SCHEMATIC DIAGRAM • See page 17 for IC Block Diagrams. • Waveforms Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF – MAIN board – 50 WV or less are not indicated except for electrolytics and tantalums.

  • Page 12: 4-4. Ic Pin Function Description

    • IC Block Diagrams 4-4. IC PIN FUNCTION DESCRIPTION – MAIN Board – • MAIN BOARD IC100 µPD753106GC-064-AB8 (SYSTEM CONTROLLER, LCD DRIVER, KEY CONTROL) IC1 CXA1019M Pin No. Pin Name Description BIAS Liquid crystal display drive bias control output terminal 2 to 4 VLC0 to VLC2 —...

  • Page 13: Exploded Views

    SECTION 5 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark may have some difference from the original are seldom required for routine service.
  • Page 14 (2) CHASSIS SECTION not supplied L451 LCD100 not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 51 1-671-841-11 ALARM KEY BOARD 3-318-203-31 SCREW (B1.7X8), TAPPING 3-032-464-01 HOLDER (LCD) 3-040-333-01 FOOT A-3663-389-A MAIN BOARD, COMPLETE 3-038-573-01 BOX (LOWER), ANTENNA 7-685-649-79 SCREW +P 3X14 TYPE2 NON-SLIT A-3683-116-A ANTENNA BOARD, COMPLETE...

  • Page 15: Electrical Parts List

    ALARM KEY SECTION 6 ELECTRICAL PARTS LIST ANTENNA MAIN NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark are seldom required for routine service. parts list may be different from the parts speci- 0 are critical for safety.
  • Page 16 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C101 1-163-038-00 CERAMIC CHIP 0.1uF IC100 8-759-639-28 IC uPD753106GC-064-AB8 C103 1-164-004-11 CERAMIC CHIP 0.1uF IC101 8-759-580-04 IC S-80820ALUP-EAH-T2 IC102 8-759-939-41 IC S-81230AG-RB C104 1-125-691-11 DOUBLE LAYER 0.022F 5.5V C107 1-163-235-11 CERAMIC CHIP...
  • Page 17 MAIN MAIN KEY TRANSFORMER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < TRANSISTOR > R351 1-216-198-00 RES, CHIP 1/8W 8-729-216-22 TRANSISTOR 2SA1162-G < SWITCH > 8-729-120-28 TRANSISTOR 2SC1623-L5L6 8-729-120-28 TRANSISTOR 2SC1623-L5L6 1-571-478-11 SWITCH, SLIDE (BRIGHTNESS) 8-729-120-28 TRANSISTOR 2SC1623-L5L6 S101...
  • Page 18 ICF-C795RC Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark MISCELLANEOUS ************** 0 10 1-555-795-00 CORD, POWER 1-791-673-11 CORD, CONNECTION L451 1-754-082-11 ANTENNA, FERRITE-ROD SP301 1-504-748-21 SPEAKER (6.6cm) 0 T301 1-433-601-11 TRANSFORMER, POWER ************************************************************** ACCESSORIES & PACKING MATERIALS...

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