Sony wm fx 551 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.
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- 3 - SECTION 1 GENERAL - LOCATION OF CONTROL SECTION 2 SERVICE NOTE - Regarding the method of adjustment and voltage check, perform sections 3-1 and 3-2 of the DISASSEMBLY, and attach the JIG to the AUDIO board as shown below. 1 !¢ 2 4 5 6 3 9 ! 08!£ !⁄ !⁄Battery case !!` 7 1 OPEN knob 4 TUNING + button 6 ENTER button 7 ˇ /REPEAT button 8 p /RADIO OFF button 9 MENU button 0 SET button ! BAND button !` VOLUME knob ! HOLD knob !¢ Display window !£ 2 REMOTE jack 5 TUNING – button 2 PRESET + /AMS FF button 3 PRESET – /AMS REW button Screw (M1.4 × 5.0)Screw (M1.4 × 5.0) TUNER board Screw (M1.7 × 4.0) Screw (M1.4 × 5.0)JIG AUDIO board