Read Sony DAV-EA20 / HCD-EA20 Service Manual online
3
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
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
6-2. BLOCK DIAGRAMS – RF/SERVO SECTION – ······ 29
– VIDEO SECTION – ················································· 30
– AUDIO SECTION – ················································· 31
– AMP SECTION – ····················································· 32
– POWER SUPPLY SECTION – ································ 33
– 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
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
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
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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