— 2 —
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.
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.
TABLE OF CONTENTS
1. SERVICE NOTE
······························································· 3
2. GENERAL
·········································································· 5
3. DISASSEMBLY
3-1. Case Block Assembly ····················································· 6
3-2. Belt (F2) ·········································································· 7
3-3. Cassette Lid Assembly ···················································· 7
3-4. Reel Ornament Assembly ··············································· 8
3-5. Main Board ····································································· 8
3-6. Motor (F2) (M901) ························································· 9
3-7. Holder Assembly ····························································· 9
3-8. Pinch Lever (N)/(R) Assembly ····································· 10
3-9. Magnetic Head (HP901) ··············································· 10
4. MECHANICAL ADJUSTMENT
································ 11
5. ELECTRICAL ADJUSTMENT
·································· 11
6. DIAGRAMS
6-1. Block Diagram ······························································ 13
6-2. Printed Wiring Board ···················································· 16
6-3. Schematic Diagram (1/2) ·············································· 19
6-4. Schematic Diagra (2/2) ················································· 22
6-5. IC Block Diagrams ······················································· 25
6-6. IC Pin Function Discription ·········································· 27
7. EXPLODED VIEWS
7-1. Cabinet Block, Main Board ·········································· 29
7-2. Mechanism Deck Block ················································ 30
8. ELECTRICAL PARTS LIST
······································· 31
