Sony hcd gs 300 av service manual

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2 HCD-GS300AV 1. SERVICING NOTES ······················································· 4 2. GENERAL ·········································································· 5 3. DISASSEMBLY ································································ 7 3-1. Cabinet Top ··································································· 8 3-2. Front Cabi Assy ····························································· 8 3-3. Back Panel Assy ···························································· 9 3-4. MAIN Board, PROLOGIC Board ································· 9 3-5. AMP Board ································································· 10 3-6. POWER Board ···························································· 10 3-7. Holder (LED-S), Bracket (Middle-R), Power Bracket ····························································· 11 3-8. CD Mechanism Deck (CDM64B-K1BD47A) ············ 11 3-9. Base Unit (BU-K1BD47A), D.SENSOR (OUT) Board, T.SENSOR Board ············ 12 3-10. D.SENSOR (IN) Board, LOAD SW Board, L.T MOTOR Board ····················································· 12 3-11. CD LED Board ···························································· 13 3-12. BU Holder Assy ··························································· 13 3-13. CD Board, Optical Pick-up (KSM-213BFN) ·············· 14 3-14. Cassette Holder, Mech Deck (CMAL1Z221) ············· 14 3-15. Belt ·············································································· 15 3-16. DISPLAY Board ·························································· 15 3-17. KEY Board ·································································· 16 3-18. HEADPHONE Board ·················································· 16 3-19. DOOR LED Board ······················································ 17 4. TEST MODE ···································································· 18 5. MECHANICAL ADJUSTMENTS ····························· 19 6. ELECTRICAL ADJUSTMENTS ······························ 19 7. DIAGRAMS 7-1. Circuit Boards Location ·············································· 23 7-2. Block Diagrams ··························································· 24 -“ CD Section -“ ···························································· 24 -“ TUNER/TAPE DECK Section -“ ······························ 25 -“ SURROUND Section -“ ············································ 26 -“ AMP Section -“ ························································· 27 -“ DISPLAY/POWER Supply Section -“ ······················ 28 7-3. Printed Wiring Board -“ CD Section -“ ························ 29 7-4. Schematic Diagram -“ CD Section -“ ··························· 30 7-5. Printed Wiring Board -“ CD MOTOR/SENSOR Section -“ ····························· 31 7-6. Schematic Diagram -“ CD MOTOR/SENSOR Section -“ ····························· 32 7-7. Printed Wiring Board -“ MAIN Section -“ ··················· 33 7-8. Schematic Diagram -“ MAIN Section (1/3) -“ ············· 34 7-9. Schematic Diagram -“ MAIN Section (2/3) -“ ············· 35 7-10. Schematic Diagram -“ MAIN Section (3/3) -“ ············· 36 7-11. Printed Wiring Board -“ AMP Section -“ ····················· 37 7-12. Schematic Diagram -“ AMP Section -“ ························ 38 7-13. Printed Wiring Board -“ SURROUND Section -“ ········ 39 7-14. Schematic Diagram -“ SURROUND Section -“ ·········· 40 7-15. Printed Wiring Board -“ DISPLAY Section -“ ············· 41 7-16. Schematic Diagram -“ DISPLAY Section -“ ················ 42 7-17. Printed Wiring Board -“ POWER Section -“ ················ 43 7-18. Schematic Diagram -“ POWER Section -“ ·················· 44 7-19. IC Block Diagrams ······················································ 45 7-20. IC Pin Function Description ········································ 48 8. EXPLODED VIEWS 8-1. General Section ··························································· 53 8-2. Front Panel Section ····················································· 54 8-3. Chassis Section ···························································· 55 8-4. Mechanism Deck Section-1 (CDM64B-K1BD47A) ·· 56 8-5. Mechanism Deck Section-2 (CDM64B-K1BD47A) ·· 57 8-6. Base Unit Section (BU-K1BD47A) ···························· 58 9. ELECTRICAL PARTS LIST ······································· 59 TABLE OF CONTENTS AM tuner section Tuning range North American model: 530 -“ 1,710 kHz (with the interval set at 10 kHz) 531 -“ 1,710 kHz (with the interval set at 9 kHz)Other model: 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 North American model: 120 V AC, 60 Hz Australian model: 220 -“ 240 V AC, 50/60 Hz Power consumption: 180 wattsDimensions (w/h/d) incl. projecting parts and controls Approx. 280 × 325 × 465 mm Mass: Approx. 9.1 kg Supplied accessories: Remote commander (1) Batteries (2) AM loop antenna (1) FM lead antenna (1) Rear speaker cords (2) Center speaker pads (attached to the backside of the center speaker) (2) Design and specifications are subject to change without notice. Tuner section FM stereo, FM/AM superheterodyne tuner FM tuner section Tuning range 87.5 -“ 108.0 MHz Antenna FM lead antenna Antenna terminals North American model: 75 ohms unbalanced Australian model: 75 ohms balanced Intermediate frequency 10.7 MHz

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3 HCD-GS300AV 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 PUBLISHED BY SONY. Fig. A. Using an AC voltmeter to check AC leakage. 1.5 k -„¦ 0.15 µF AC voltmete r (0.75 V) To Exposed Metal Parts on Set Earth Ground SAFETY CHECK-OUT After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, metallized knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes.). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3.Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The limit indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A)CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick- up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens. LASER DIODE AND FOCUS SEARCH OPERATION CHECK Carry out the S curve check in CD section adjustment and check that the S curve waveforms is output three times. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT 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 during 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. ATTENTION AU COMPOSANT AYANT RAPPORT Ã- LA SÉCURITÉ! LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.