2
WM-EX422
Specifications ........................................................................... 1
1. SERVICING NOTE
...................................................... 3
2. GENERAL
...................................................................... 4
3. DISASSEMBLY
3-1. Cabinet (Front)Sub Assy ............................................ 5
3-2. Main Board ................................................................. 6
3-3. Mechanism Deck ........................................................ 6
3-4. Cassette Holder Sub Assy ........................................... 7
4. ADJUSTMENTS
4-1. Mechanical Adjustments ............................................ 8
4-2. Electrical Adjustments ................................................ 8
5. DIAGRAMS
5-1. Block Diagram ............................................................ 9
5-2. Printed Wiring Boards .............................................. 10
5-3. Schematic Diagram .................................................... 11
5-4. IC Block Diagrams ................................................... 12
6. EXPLODED VIEWS
6-1. Cabinet Section ......................................................... 13
6-2. Mechanism Deck Section
(MF-WMFX495-147) ....................... 14
7. ELECTRICAL PARTS LIST
................................... 15
Flexible Circuit Board Repairing
• Keep the temperature of the 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.
Notes 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.
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