Table Of Contents - Sony WM-GX221 Service Manual

WM-GX221
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.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 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.
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TABLE OF CONTENTS

1. SERVICE NOTE
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2. GENERAL
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3. DISASSEMBLY
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3-1. Panel (Cabinet Front), Cabinet (Front) Assy ·································· 5
3-2. MAIN Board, Mechanism Deck (MT-WMGX221-175) ················ 6
3-3. HE901, HRP901, M601, Belts ························································ 7
3-4. SUB Board ······················································································ 7
4. MECHANICAL ADJUSTMENT
5. ELECTRICAL ADJUSTMENT
6. DIAGRAMS
······················································································ 10
6-1. Block Diagram - Tuner Section - ················································· 11
6-2. Block Diagram - Main Section - ················································· 12
6-3. Printed Wiring Boards ·································································· 13
6-4. Schematic Diagram - MAIN Board (1/2) - ·································· 14
6-5. Schematic Diagram - MAIN Board (2/2) - ·································· 15
6-6. IC Block Diagrams ······································································· 16
7. EXPLODED VIEWS
······································································ 17
7-1. Overall Section ············································································· 17
7-2. Cabinet (Front) Section ································································· 18
7-3. Mechanism Deck Block-1 (MT-WMGX221-175) ······················· 19
7-4. Mechanism Deck Block-2 (MT-WMGX221-175) ······················· 20
8. ELECTRICAL PARTS LIST
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