Sony hcd gv 8 service manual

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2 HCD-GV6/GV8 Tuner section FM stereo, FM/AM superheterodyne tuner FM tuner section Tuning range 87.5 -“ 108.0 MHz (50 kHz step) Antenna FM lead antenna Antenna terminals 75 ohm unbalanced Intermediate frequency 10.7 MHz AM tuner section Tuning range Middle Eastern and Philippine models: 531 -“ 1,602 kHz (with the interval set at 9 kHz) Other models: 531 -“ 1,602 kHz (with the interval set at 9 kHz) 530 -“ 1,710 kHz (with the interval set at 10 kHz) Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz General Power requirements 120 V, 220 V or 230 -“ 240 V AC, 50/60 Hz Adjustable with voltage selector Power consumption HCD-GV8 300 watts HCD-GV6 180 watts Dimensions (w/h/d) Approx. 355 × 425 × 450 mm Mass : HCD-GV8 Approx. 16.0 kg HCD-GV6 Approx. 15.5 kg Design and specifications are subject to change without notice. Notes on chip component replacement -Never reuse a disconnected chip component. -Notice that the minus side of a tantalum capacitor may be dam- aged by heat. Flexible Circuit Board Repairing -Keep the temperature of the soldering iron around 270 ËšC dur- ing repairing. -Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). -Be careful not to apply force on the conductor when soldering or unsoldering. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 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. The following caution label is located inside the unit. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.

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3 HCD-GV6/GV8 TABLE OF CONTENTS 1. SERVICING NOTES ................................................ 4 2. GENERAL Location of Controls ....................................................... 5 Setting the Time .............................................................. 6 3. DISASSEMBLY 3-1. Disassembly Flow ........................................................... 7 3-2. Case ................................................................................. 7 3-3. Front Panel Section ......................................................... 8 3-4. Cover (TC), Tape Mechanism Deck (TCM-230PWR42) ......................................................... 8 3-5. MAIN Board, Fan, D.C. (M901) .................................... 9 3-6. CD Mechanism Deck (CDM37L-5BD34L) ................... 10 3-7. Base Unit (BU-5BD34L) ................................................ 11 3-8. Disc Table ........................................................................ 11 4. TEST MODE .............................................................. 12 5. MECHANICAL ADJUSTMENTS ....................... 14 6. ELECTRICAL ADJUSTMENTS Deck section .................................................................... 14 CD Section ...................................................................... 17 Video Section .................................................................. 17 7. DIAGRAMS 7-1. Block Diagram -“ CD SERVO Section -“....................... 18 7-2. Block Diagram -“ AUDIO/VIDEO CD Section -“.......... 19 7-3. Block Diagram -“ TUNER/TAPE DECK Section -“...... 20 7-4. Block Diagram -“ MAIN Section -“................................ 21 7-5. Block Diagram -“ DISPLAY/KEY CONTROL/ POWER SUPPLY Section -“........................................... 22 7-6. Note for Printed Wiring Boards and Schematic Diagrams ....................................................... 23 7-7. Printed Wiring Board -“ BD Board -“............................. 24 7-8. Schematic Diagram -“ BD Board -“................................ 25 7-9. Schematic Diagram -“ VIDEO Board (1/2) -“................ 26 7-10. Schematic Diagram -“ VIDEO Board (2/2) -“................ 27 7-11. Printed Wiring Board -“ VIDEO Board -“....................... 28 7-12. Printed Wiring Boards -“ CD MOTOR Section -“.......... 30 7-13. Schematic Diagram -“ CD MOTOR Section -“.............. 31 7-14. Printed Wiring Board -“ AUDIO Board -“...................... 32 7-15. Schematic Diagram -“ AUDIO Board -“......................... 33 7-16. Printed Wiring Board -“ LEAF SW Board -“.................. 34 7-17. Schematic Diagram -“ LEAF SW Board -“..................... 34 7-18. Schematic Diagram -“ MAIN Board (1/3) -“.................. 35 7-19. Schematic Diagram -“ MAIN Board (2/3) -“.................. 36 7-20. Schematic Diagram -“ MAIN Board (3/3) -“.................. 37 7-21. Printed Wiring Board -“ MAIN Board -“........................ 38 7-22. Printed Wiring Board -“ PA Board -“.............................. 40 7-23. Schematic Diagram -“ PA Board -“................................. 41 7-24. Printed Wiring Boards -“ MIC/FRONT INPUT/ HEADPHONES Boards -“............................................... 42 7-25. Schematic Diagram -“ MIC/FRONT INPUT/ HEADPHONES Boards -“............................................. 43 7-26. Printed Wiring Board -“ PANEL FL Board -“................. 44 7-27. Schematic Diagram -“ PANEL FL Board -“................... 45 7-28. Printed Wiring Boards -“ PANEL VR/ILLUMINATION Boards -“..................... 46 7-29. Schematic Diagram -“ PANEL VR/ILLUMINATION Boards -“..................... 47 7-30. Printed Wiring Boards -“ TC-A/TC-B/CD-L/ CD-R (1)/CD-R (2) Boards -“......................................... 487-31. Schematic Diagram -“ TC-A/TC-B/CD-L/ CD-R (1)/CD-R (2) Boards -“......................................... 49 7-32. Printed Wiring Board -“ TRANSFORMER Section-“.... 50 7-33. Schematic Diagram -“ TRANSFORMER Section-“....... 50 7-34. IC Pin Function Description ........................................... 56 8. EXPLODED VIEWS 8-1. Case, Back Panel Section ................................................ 66 8-2. Front Panel Section-1 ...................................................... 67 8-3. Front Panel Section-2 ...................................................... 68 8-4. Chassis Section ............................................................... 69 8-5. CD Mechanism Deck Section (CDM37L-5BD34L) ...... 70 8-6. Base Unit Section (BU-5BD34L) ................................... 71 8-7. Tape Mechanism Deck Section-1 (TCM-230PWR42) ......................................................... 72 8-8. Tape Mechanism Deck Section-2 (TCM-230PWR42) ......................................................... 73 9. ELECTRICAL PARTS LIST ............................... 74