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TABLE OF CONTENTS
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.
SECTION 1
GENERAL
This section is extracted
from instruction manual.
1. GENERAL
·········································································· 2
2. SERVICE NOTE
······························································· 3
3. DISASSEMBLY
3-1. Main Assembly ······························································ 4
3-2. Chassis Sub Assy ··························································· 5
3-3. Main Board and Mechanism Deck ································ 5
3-4. Belt ················································································ 6
3-5. Head, Magnetic (HP901) ··············································· 6
4. MECHANICAL ADJUSTMENT
·································· 7
5. ELECTRICAL ADJUSTMENT
···································· 7
6. DIAGRAMS
6-1. IC Block Diagrams ······················································ 10
6-2. Block Diagram ···························································· 11
6-3. Schematic Diagram ····················································· 13
6-4. Printed Wiring Board ··················································· 15
6-5. IC Pin Function Description ········································ 17
7. MEXPLODED VIEWS
7-1. Cabinet Assy Section ··················································· 18
7-2. Main Board Section ····················································· 19
7-3. Mechanism Deck Section-1
(MF-WMFS420-114) ·················································· 20
7-4. Mechanism Deck Section-2
(MF-WMFS420-114) ·················································· 21
8. ELECTRICAL PPARTS LIST
···································· 22
