Sony wm fx 522 service manual

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2 WM-FX522 TABLE OF CONTENTS 1. SERVICING NOTES ............................................... 3 2. GENERAL ................................................................... 5 3. DISASSEMBLY 3-1. Disassembly Flow........................................................... 6 3-2. Cassette Lid Assy............................................................ 6 3-3. Case Block Assy.............................................................. 7 3-4. Ornament Reel................................................................ 7 3-5. Battery Holder................................................................. 8 3-6. Belt (F2).......................................................................... 8 3-7. MAIN Board................................................................... 9 3-8. Motor (Capstan/Reel) (M901)........................................ 10 3-9. Holder (FS) Assy............................................................. 10 3-10. Pinch Lever (N) Assy, Pinch Lever (R) Assy................. 11 3-11. Magnetic Head (Playback) (HP901).............................. 11 4. MECHANICAL ADJUSTMENTS ....................... 12 5. ELECTRICAL ADJUSTMENTS ......................... 12 6. DIAGRAMS 6-1. Block Diagram – TUNER Section –............................. 15 6-2. Block Diagram – MAIN Section –................................ 16 6-3. Note for Printed Wiring Board and Schematic Diagrams................................................ 17 6-4. Schematic Diagram – MAIN Board (1/2) –.................. 18 6-5. Schematic Diagram – MAIN Board (2/2) –.................. 19 6-6. Printed Wiring Board...................................................... 20 6-7. IC Pin Function Description........................................... 23 7. EXPLODED VIEWS 7-1. Case Section.................................................................... 25 7-2. Bracket, MAIN Board Section....................................... 26 7-3. Mechanism Deck Section (MT-WMEX505-162).......... 27 8. ELECTRICAL PARTS LIST ............................... 28Notes 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 ˚C 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.