Sony wm gx 888 service manual

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- 2 - Notes on chip component replacement - Never reuse a disconnected chip component. - Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing - Keep the temperature of soldering iron around 270˚C 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. SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED 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 PUBLISHED BY SONY. TABLE OF CONTENTS 1. SERVICE NOTE ······························································· 3 2. GENERAL ·········································································· 5 3. DISASSEMBLY 3-1. Case assy ········································································· 6 3-2. Belt ·················································································· 7 3-3. Lid block assy, cassette ··················································· 7 3-4. Ornament, reel ································································ 8 3-5. Main Board ····································································· 8 3-6. Motor (M601) ································································· 9 3-7. Holder (F) Assy ······························································· 9 3-8. Lever (N)/(R) Assy, pinch ············································· 10 3-9. Head, magnetic (HP901) ··············································· 10 4. MECHANICAL ADJUSTMENT ································ 11 5. ELECTRICAL ADJUSTMENT ·································· 11 6. DIAGRAMS 6-1. Block Diagram ······························································ 13 6-2. Schematic Diagram (1/3) ·············································· 16 6-3. Schematic Diagram (2/3) ·············································· 19 6-4. Schematic Diagram (3/3) ·············································· 21 6-5. IC Block Diagrams ······················································· 23 6-6. Printed Wiring Board (SIDE A) ···································· 25 6-7. Printed Wiring Board (SIDE B) ···································· 27 6-8. IC Pin Function Discription ·········································· 29 7. EXPLODED VIEWS 7-1. Cabinet Block, Main Board ·········································· 31 7-2. Mechanism Deck Block ················································ 32 8. ELECTRICAL PARTS LIST ······································· 33