2
HCD-EP50
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 7
3-2. Front Panel Section ......................................................... 8
3-3. MAIN Board ................................................................... 8
3-4. CD Cabinet Section......................................................... 9
3-5. CD Mechanism Deck (CS-21SC-1280) ......................... 9
3-6. Tape Mechanism Deck (CRL3439) ................................ 10
3-7. Cassette Lid ..................................................................... 10
4. MECHANICAL ADJUSTMENTS ....................... 11
5. ELECTRICAL ADJUSTMENTS......................... 11
6. DIAGRAMS
6-1. Block Diagram – TUNER Section – ............................. 15
6-2. Block Diagram – TAPE DECK Section – ..................... 16
6-3. Block Diagram – MAIN Section – ................................ 17
6-4. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 18
6-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 19
6-6. Schematic Diagram – FM TUNER Section – ............... 19
6-7. Schematic Diagram – MAIN Board (1/3) – .................. 20
6-8. Schematic Diagram – MAIN Board (2/3) – .................. 21
6-9. Schematic Diagram
– MAIN (3/3)/HEADPHONE Boards – ......................... 22
6-10. Printed Wiring Boards
– MAIN/HEADPHONE Boards – .................................. 23
6-11. Printed Wiring Board – DISPLAY Board – .................. 24
6-12. Schematic Diagram – DISPLAY Board – ..................... 25
6-13. Printed Wiring Board – POWER Board – ..................... 26
6-14. Schematic Diagram – POWER Board –........................ 27
6-15. IC Pin Function Description ........................................... 31
7. EXPLODED VIEWS
7-1. Cabinet Section ............................................................... 33
7-2. Front Panel Section-1...................................................... 34
7-3. Front Panel Section-2...................................................... 35
7-4. CD Cabinet Section......................................................... 36
8. ELECTRICAL PARTS LIST ............................... 37
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