Sony wm fx 553 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. EXPLANATION OF IC TERMINALS ························· 9 7. DIAGRAMS 7-1. Printed Wiring Boards (Tuner Section) ······················· 11 7-2. Schematic Diagram (Tuner Section) ··························· 15 7-3. Schematic Diagram (Audio Section) ··························· 18 7-4. Printed Wiring Board (Audio Section) ························ 21 8. EXPLODED VIEWS 8-1. Cabinet Section ··························································· 27 8-2. Audio, Tuner Board Section ········································ 28 8-3. Mechanism Section (MT-WMEX550-125) ················· 29 9. ELECTRICAL PARTS LIST ······································· 30 The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Les composants identifiés par une marque ! sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié.