Sony STR-DB870 Service Manual

4
STR-DB870/DB1070
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 5
2. GENERAL ................................................................... 6
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 8
3-2. Case ................................................................................. 9
3-3. S-VIDEO board, VIDEO Board, Tuner ......................... 9
3-4. VIDEO AU Board ........................................................... 10
3-5. DIGITAL Board .............................................................. 10
3-6. MAIN Board ................................................................... 11
4. TEST MODE.............................................................. 12
5. DIAGRAMS
5-1. Note for Printed Wiring Boards
and Schematic Diagrams ................................................ 13
5-2. Schematic Diagram – DIGITAL Board (1/5) – ............. 15
5-3. Schematic Diagram – DIGITAL Board (2/5) – ............. 16
5-4. Schematic Diagram – DIGITAL Board (3/5) – ............. 17
5-5. Schematic Diagram – DIGITAL Board (4/5) – ............. 18
5-6. Schematic Diagram – DIGITAL Board (5/5) – ............. 19
5-7. Printed Wiring Board
– DIGITAL Board (Component Side) – ......................... 20
5-8. Printed Wiring Board
– DIGITAL Board (Conductor Side) – ........................... 21
5-9. Printed Wiring Board – VIDEO Board –....................... 22
5-10. Schematic Diagram – VIDEO Board – ......................... 23
5-11. Printed Wiring Boards
– S-VIDEO/VIDEO AU Boards – .................................. 24
5-12. Schematic Diagram
– S-VIDEO/VIDEO AU Boards – .................................. 25
5-13. Printed Wiring Board – MAIN Board – ........................ 26
5-14. Schematic Diagram – MAIN Board (1/3) – .................. 27
5-15. Schematic Diagram – MAIN Board (2/3) – .................. 28
5-16. Schematic Diagram – MAIN Board (3/3) – .................. 29
5-17. Printed Wiring Board – BIAS Board –.......................... 30
5-18. Schematic Diagram – BIAS Board –............................. 31
5-19. Printed Wiring Boards – DISP/SW Boards – ................ 32
5-20. Schematic Diagram – DISP/SW Boards – .................... 33
5-21. Printed Wiring Boards
– H.P/MUTING/POWER/SP/VIDEO 3 Boards – ......... 34
5-22. Schematic Diagram
– H.P/MUTING/POWER/SP/VIDEO 3 Boards – ......... 35
5-23. Printed Wiring Boards
– POWER SUPPLY Section – ........................................ 36
5-24. Schematic Diagram – POWER SUPPLY Section – ...... 37
5-25. IC Pin Function Description ........................................... 43
6. EXPLODED VIEWS
6-1. Case Section .................................................................... 55
6-2. Front Panel Section-1...................................................... 56
6-3. Front Panel Section-2...................................................... 57
6-4. Chassis Section-1 ............................................................ 58
6-5. Chassis Section-2 ............................................................ 59
7. ELECTRICAL PARTS LIST ............................... 60

Sony STR-DB870 Specifications

General

Brand	Sony
Model	STR-DB870
Category	Stereo Receiver
Language	English