Sony Walkman WM-FX661, 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. 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.