2
M-450/455
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.
TABLE OF CONTENTS
Specifications ........................................................................... 1
1. GENERAL ........................................................................ 3
2. DISASSEMBLY
2-1. Cassette Holder Asssy ................................................ 4
2-2. Cabinet (Rear)............................................................. 4
2-3. Cabinet (Front) ........................................................... 5
2-4. Main Board, Mechanism Deck ................................... 5
2-5. Head, Magnetic (HRPE901) ....................................... 6
2-6. Motor (M901) ............................................................. 6
3. ADJUSTMENTS
3-1. Mechanical Adjustments ............................................ 7
3-2. Electrical Adjustments ................................................ 7
4. DIAGRAMS
4-1. Block Diagrams .......................................................... 9
4-2. Printed Wiring Boards .............................................. 10
4-3. Schematic Diagram....................................................11
5. EXPLODED VIEWS
5-1. Cabinet (Rear) Section.............................................. 13
5-2. Cabinet (Front) Section ............................................ 14
5-3. Mechanism Deck Section ......................................... 15
6. ELECTRICAL PARTS LIST ........................................ 16
Ver 1.2
• How to recognize former type and new type mechanism
deck
Former Type New Type
