Sony HCD-EA20 Service Manual Download

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HCD-EA20

TABLE OF CONTENTS

1. SERVICING NOTE

·························································· 4

2. GENERAL

·········································································· 7

3. DISASSEMBLY

································································ 9

3-1. CASE ··········································································· 10
3-2. FRONT PANEL SECTION ········································· 11
3-3. PANEL BOARD, STANDBY BOARD ······················· 11
3-4. UCOM BOARD ··························································· 12
3-5. DMB03 BOARD ·························································· 12
3-6. I/O BOARD ································································· 13
3-7. AMP BOARD, SUB TRANSFORMER BOARD ······· 14
3-8. DVD MECHANISM (CDM77A-DVBU20) ··············· 15
3-9. TRAY (AU) ·································································· 15
3-10. MS-128 BOARD ························································ 16
3-11. BASE UNIT ······························································· 16
3-12. OPTICAL PICK-UP (TDP022W) ····························· 17

4. TEST MODE

···································································· 18

5. ELECTRICAL ADJUSTMENT

·································· 26

6. DIAGRAMS

6-1. CIRCUIT BOARDS LOCATION ······························· 27
6-2. BLOCK DIAGRAMS – RF/SERVO SECTION – ······ 29

– VIDEO SECTION – ················································· 30
– AUDIO SECTION – ················································· 31
– AMP SECTION – ····················································· 32
– POWER SUPPLY SECTION – ································ 33

6-3. PRINTED WIRING BOARD – RF SECTION – ········ 34
6-4. SCHEMATIC DIAGRAM – RF SECTION – ············· 35
6-5. PRINTED WIRING BOARD

– LOADING SECTION – ··········································· 36

6-6. SCHEMATIC DIAGRAM

– LOADING SECTION – ··········································· 36

6-7. PRINTED WIRING BOARD

– DMB SECTION (SIDE A) – ···································· 37

6-8. PRINTED WIRING BOARD

– DMB SECTION (SIDE B) – ···································· 38

6-9. SCHEMATIC DIAGRAM

– DMB SECTION (1/8) – ·········································· 39

6-10. SCHEMATIC DIAGRAM

– DMB SECTION (2/8) – ··········································· 40

6-11. SCHEMATIC DIAGRAM

– DMB SECTION (3/8) – ··········································· 41

6-12. SCHEMATIC DIAGRAM

– DMB SECTION (4/8) – ··········································· 42

6-13. SCHEMATIC DIAGRAM

– DMB SECTION (5/8) – ··········································· 43

6-14. SCHEMATIC DIAGRAM

– DMB SECTION (6/8) – ··········································· 44

6-15. SCHEMATIC DIAGRAM

– DMB SECTION (7/8) – ··········································· 45

6-16. SCHEMATIC DIAGRAM

– DMB SECTION (8/8) – ··········································· 46

6-17. PRINTED WIRING BOARD

– UCOM SECTION – ················································· 47

6-18. SCHEMATIC DIAGRAM

– UCOM SECTION – ················································· 48

6-19. PRINTED WIRING BOARD

– I/O SECTION – ························································ 49

6-20. SCHEMATIC DIAGRAM

– I/O SECTION (1/2) – ··············································· 50

6-21. SCHEMATIC DIAGRAM

– I/O SECTION (2/2) – ··············································· 51

6-22. PRINTED WIRING BOARD

– AMP/SUB TRANSFORMER SECTION – ············· 52

6-23. SCHEMATIC DIAGRAM

– AMP/SUB TRANSFORMER SECTION (1/2) – ···· 53

6-24. SCHEMATIC DIAGRAM

– AMP/SUB TRANSFORMER SECTION (2/2) – ···· 54

6-25. PRINTED WIRING BOARD

– PANEL SECTION – ················································· 55

6-26. SCHEMATIC DIAGRAM

– PANEL SECTION – ················································· 56

6-27. IC BLOCK DIAGRAMS ············································ 59
6-28. IC PIN FUNCTION DESCRIPTION ························· 68

7. EXPLODED VIEWS

7-1. CASE SECTION ························································· 80
7-2. FRONT PANEL SECTION ········································· 81
7-3. CHASSIS SECTION ··················································· 82
7-4. DVD MECHANISM SECTION

(CDM77A-DVBU20) ·················································· 83

8. ELECTRICAL PARTS LIST

······································· 84

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