TABLE OF CONTENTS
1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
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2. DISASSEMBLY
.
2-l.
2-2.
2-3.
2-4.
2-5.
2-6.
2-7.
2-8.
2-9.
Ribbon .................................................................................. 6
Upper Cabinet Assembly ...................................................... 6
DK-31 and IR-31 Board ......................................................
Power SW Block
7
..................................................................
Power Block (SR784 Board) (Switching Regulator) ........... 8
Block Assembly
8
..................................................
Mechanism Deck .................................................................. 9
MD-3 1 Board, Reel Motor, Stepping Motor, S Reel,
T Reel ................................................................................... 9
Cassette Entrance Guide .....................................................
IBM PC/AT is a registered trademark of International
Business Machines Corporation of the U.S.A.
MS-DOS and Windows are registered trademarks
licensed to Microsoft Corporation, registered
U.S.A. and other countries.
Macintosh is a trademark licensed to Apple Computer
Inc., registered in the U.S.A. and other countries.
Adobe and Photoshop are trademarks of Adobe
Systems Incorporated.
All other product names mentioned herein may be the
trademarks or registered trademarks of their respective
companies.
3. MECHANICAL ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Furthermore,
are not mentioned in each
case in this manual.
4. ELECTRICAL ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
5. DIAGRAMS
1.
Circuit Boards Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
5-2.
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
5-3.
Printed Wiring Board
Main Section
. . . . . . . . . . . . . . . . . . . . . . . . . 18
5-4.
Schematic Diagram
Main Section
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1
5-5.
Schematic Diagram
Motor Drive/Sensor Section
. . . . 26
5-6.
Printed Wiring Board Motor Drive/Sensor Section
5-7.
Printed Wiring Board -Power Section
. . . . . . . . . . . . . . . . . . . . . . . . 3 1
5-8.
Schematic Diagram
Power Section
. . . . . . . . . . . . . . . . . . . . . . . . . . 33
5-9. IC Pin Functions
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System Control
DK-31 Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
35
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Head Control, Mechanism Control
Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
38
6. EXPLODED VIEWS
1.
Cabinet Section.. ................................................................. 41
6-2.
Mechanism Section- 1 ........................................................
6-3.
Mechanism Section-2 ......................................................... 43
6-4.
Mechanism Section-3 ......................................................... 44
7. ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
45
Notes on chip component replacement
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Never reuse a disconnected chip component.
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Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
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Keep the temperature of soldering iron around 270°C
during repairing.
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Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
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Be careful not to apply force on the conductor when soldering
or unsoldering.
SAFETY-RELATED COMPONENT WARNING
COMPONENTS IDENTIFIED BY MARK
A OR
DOTTED
WITH MARK
A
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.
