Sony HCD-EH25 - TABLE OF CONTENTS

HCD-EH25/EH26
2
1. SERVICING NOTES ............................................. 3
2. GENERAL .................................................................. 4
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 5
3-2. Rear Cabinet Block ......................................................... 5
3-3. Front Cabinet Block, Top Cabinet Block,
MAIN Board ................................................................... 6
3-4. MF-EH10 (Tape Mechanism Deck), Cassette Lid .......... 6
3-5. Base Unit Block (BU-K8BD90-WOD) .......................... 7
3-6. Optical Pick-up Block (KSM-213CDP) ......................... 7
4. TEST MODE ............................................................ 8
5. MECHANICAL ADJUSTMENTS ...................... 9
6. ELECTRICAL ADJUSTMENTS ........................ 9
7. DIAGRAMS
7-1. Block Diagram - CD SERVO Section - .......................... 12
7-2. Block Diagram - TUNER/USB Section - ....................... 13
7-3. Block Diagram - MAIN/POWER SUPPLY Section - .... 14
7-4. Printed Wiring Board - CD Board - ................................ 16
7-5. Schematic Diagram - CD Board - ................................... 17
7-6. Printed Wiring Board - USB Board - .............................. 18
7-7. Schematic Diagram - USB Board - ................................. 19
7-8. Printed Wiring Board - MAIN Board - ........................... 20
7-9. Schematic Diagram - MAIN Board (1/3) - ..................... 21
7-10. Schematic Diagram - MAIN Board (2/3) - ..................... 22
7-11. Schematic Diagram - MAIN Board (3/3) - ..................... 23
7-12. Printed Wiring Board - PANEL Board - ......................... 24
7-13. Schematic Diagram - PANEL Board - ............................ 25
7-14. Printed Wiring Board - PT-VBUS Board - ..................... 26
7-15. Schematic Diagram - PT-VBUS Board - ........................ 26
8. EXPLODED VIEWS
8-1. Overall Section ............................................................... 27
8-2. Front Cabinet Section ..................................................... 28
8-3. Top Cabinet Section ........................................................ 29
8-4. Base Unit Section (BU-K8BD90-WOD) ........................ 30
9. ELECTRICAL PARTS LIST .............................. 43
Accessories are given in the last of the electrical parts list.
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 dam-
aged by heat.
SAFETY-RELATED COMPONET WARNING!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specifi ed herein may result in hazardous radia-
tion exposure.
This appliance is classifi ed as
a CLASS 1 LASER product.
This marking is located on the
rear exterior.
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