Sony Walkman WM-FX551, Service Manual

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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.