Sony wm fx 661 service manual

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- 2 - TABLE OF CONTENTS Flexible Circuit Board Repairing - Keep the temperature of the soldering iron aroud 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. 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. Specification ················································································· 1 1. GENERAL ·········································································· 3 2. SERVICE NOTE ······························································· 3 3. DISASSEMBLY 3-1. Case Assy Removal ······················································· 4 3-2. Tuner Board Removal ··················································· 4 3-3. Audio Board Removal ··················································· 5 3-4. Cassette Lid Assy Removal ··········································· 5 3-5. Mechanism Deck Removal ··········································· 6 4. MECHANICAL ADJUSTMENT ·································· 7 5. ELECTRICAL ADJUSTMENT ···································· 7 6. DIAGRAMS ········································································ 9 6-1. Block Diagram ······························································ 9 6-2. IC Pin Function Description ········································ 11 6-3. Printed Wiring Boards (Tuner Section) ······················· 13 6-4. Schematic Diagram (Tuner Section) ··························· 17 6-5. Schematic Diagram (Audio Section) ··························· 20 6-6. Printed Wiring Board (Audio Section) ························ 23 7. EXPLODED VIEWS 7-1. Cabinet Section ··························································· 29 7-2. Audio, Tuner Board Section ········································ 30 7-3. Mechanism Section (MT-WMEX550-125) ················· 31 8. ELECTRICAL PARTS LIST ······································· 32 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. ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ! LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE ! 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.