Sony HCD-EC50, Service Manual, Page: 2 / 78

2
HCD-EC50
TABLE OF CONTENTS
1. SERVICING NOTES
................................................ 3
2. GENERAL
................................................................... 4
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 6
3-2. Side Panel (L) And Side Panel (R) .................................. 7
3-3. Top Section ...................................................................... 7
3-4. Front Panel Section ......................................................... 8
3-5. PANEL Board .................................................................. 8
3-6. JACK Board ..................................................................... 9
3-7. MAIN Board .................................................................... 9
3-8. CD Section And Base Unit
(BU-K6BD83S-WOD) Section ....................................... 10
3-9. Chassis (main mold) ........................................................ 11
3-10. PT Board And Power Transformer .................................. 11
4. MECHANICAL ADJUSTMENTS
......................... 12
5. ELECTRICAL ADJUSTMENTS
.......................... 12
6. DIAGRAMS
6-1. Block Diagram — BD/DRIVER Section — .................. 18
6-2. Block Diagram — TUNER Section — .......................... 19
SAFETY-RELATED COMPONENT 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE
0
SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT
DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
6-3. Block Diagram — MAIN Section — ............................. 20
6-4. Printed Wiring Board — BD Section — ........................ 21
6-5. Schematic Diagram — BD Section — ........................... 22
6-6. Printed Wiring Board — MAIN Section — ................... 23
6-7. Schematic Diagram — MAIN Section (1/3) — ............. 24
6-8. Schematic Diagram — MAIN Section (2/3) — ............. 25
6-9. Schematic Diagram — MAIN Section (3/3) — ............. 26
6-10. Printed Wiring Board — PANEL Section — ................. 27
6-11. Schematic Diagram — PANEL Section — .................... 28
6-12. Printed Wiring Board — AMP Section — ..................... 29
6-13. Schematic Diagram — AMP Section — ........................ 30
6-14. Printed Wiring Board — POWER Section — ................ 31
6-15. Schematic Diagram — POWER Section — .................. 31
7. EXPLODED VIEWS
7-1. Overall Section ................................................................ 38
7-2. Front Panel Section ......................................................... 39
7-3. Chassis Section ................................................................ 40
7-4. Top Section ...................................................................... 41
7-5. CD Section And Base Unit
(BU-K6BD83S-WOD) Section ....................................... 42
8. ELECTRICAL PARTS LIST
.................................. 43