Sony STR-DB790 Service Manual

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STR-DA1000ES/DB790
1. SERVICING NOTES ............................................... 5
2. GENERAL ................................................................... 7
Location of Controls ....................................................... 7
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 10
3-2. Case (414535) ................................................................. 11
3-3. COMP-V Board .............................................................. 11
3-4. Back Panel Block ............................................................ 12
3-5. Main Block ...................................................................... 12
3-6. DIGITAL Board .............................................................. 13
3-7. STAY-3/STAY-4/SP-B/SP-A/S-VIDEO/
VIDEO/VIDEO-AU/AU-IN Board ................................ 14
3-8. MAIN Board ................................................................... 14
4. TEST MODE.............................................................. 15
5. ELECTRICAL ADJUSTMENT............................ 17
6. DIAGRAMS
6-1. Block Diagram – TUNER/VIDEO Section –................ 19
6-2. Block Diagram – AUDIO DSP Section –...................... 20
6-3. Block Diagram – AUDIO CONTROL Section – .......... 21
6-4. Block Diagram – AUDIO AMP Section –..................... 22
6-5. Block Diagram
– DISPLAY/KEY CONTROL Section –........................ 23
6-6. Block Diagram – POWER SUPPLY Section – ............. 24
6-7. Note for Printed Wiring Boards
and Schematic Diagrams ................................................ 25
6-8. Printed Wiring Board
– DIGITAL Board (Component Side) – ......................... 26
6-9. Printed Wiring Board
– DIGITAL Board (Conductor Side) –........................... 27
6-10. Schematic Diagram – DIGITAL Board (1/4) – ............. 28
6-11. Schematic Diagram – DIGITAL Board (2/4) – ............. 29
6-12. Schematic Diagram – DIGITAL Board (3/4) – ............. 30
6-13. Schematic Diagram – DIGITAL Board (4/4) – ............. 31
6-14. Printed Wiring Boards
– VIDEO/VIDEO-AU Boards – ..................................... 32
6-15. Schematic Diagram
– VIDEO/VIDEO-AU Boards – ..................................... 33
6-16. Printed Wiring Boards – HP-V3/S-VIDEO Boards – ... 34
6-17. Schematic Diagram – HP-V3/S-VIDEO Boards – ....... 35
6-18. Printed Wiring Board – COMP-V Board – ................... 36
6-19. Schematic Diagram – COMP-V Board – ...................... 37
6-20. Printed Wiring Board – AU-IN Board – ........................ 38
6-21. Schematic Diagram – AU-IN Board – ........................... 39
6-22. Printed Wiring Board – MAIN Board – ........................ 40
6-23. Schematic Diagram – MAIN Board (1/3) – .................. 41
6-24. Schematic Diagram – MAIN Board (2/3) – .................. 42
6-25. Schematic Diagram – MAIN Board (3/3) – .................. 43
6-26. Printed Wiring Board – A-CLASS Board – .................. 44
6-27. Schematic Diagram – A-CLASS Board – ..................... 45
6-28. Printed Wiring Boards
– SBL/STAY/STAY2 Boards – ....................................... 46
6-29. Schematic Diagram
– SBL/STAY/STAY2 Boards – ....................................... 47
6-30. Printed Wiring Boards
– SP-A/SP-B/STAY3/STAY4 Boards – .......................... 48
6-31. Schematic Diagram
– SP-A/SP-B/STAY3/STAY4 Boards – .......................... 49
6-32. Printed Wiring Boards
– DISPLAY/FUN/VOL Boards – ................................... 50
6-33. Schematic Diagram
– DISPLAY/FUN/VOL Boards – ................................... 51
6-34. Printed Wiring Boards
– DC1/DC2/TH/4/8 SW Boards – .................................. 52
6-35. Schematic Diagram
– DC1/DC2/TH/4/8 SW Boards – .................................. 53
6-36. Printed Wiring Boards
– AC/PRI/SEC1/SEC3 Boards –..................................... 54
6-37. Schematic Diagram
– AC/PRI/SEC1/SEC3 Boards –..................................... 55
6-38. IC Pin Function Description ........................................... 63
6. EXPLODED VIEWS
7-1. Case Section .................................................................... 70
7-2. Chassis Section-1 ............................................................ 71
7-3. Chassis Section-2 ............................................................ 72
7-4. Main Block Section......................................................... 73
7-5. MAIN Board Block......................................................... 74
7-6. Chassis Section-3 ............................................................ 75
7-7. Front Panel Block-1 ........................................................ 76
7-8. Front Panel Block-2 ........................................................ 77
7-9. Front Panel Block-3 ........................................................ 78
8. ELECTRICAL PARTS LIST ............................... 79
TABLE OF CONTENTS
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TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

Sony STR-DB790 Specifications

General

Dimensions (WxDxH)	430 x 401 x 161 mm
Power requirements	230 V, 50/60 Hz
Supported radio bands	FM, MW
Radio Data System (RDS)	Yes
I/O ports	5.1 Analogue Input - 1.0 Audio Input - 3.0 Audio Input Front - 1 AV, S-Video Audio Output - 1.0 Control A1 / A1 II Digital Input: coaxial - 1.0 Digital Input: optical - 4.0 Digital Output: optical - 1.0 Headphone Output Monitor Output (Picture): FBAS - 1.0 Monitor Output (Picture): S-Video - 1.0 Phono Input Speaker Selector A S-Video Input - 4.0 S-Video Output - 1.0 Video Input - 5.0 Video Output - 2.0
Connectivity technology	Wired
Power consumption (standby)	0.5 W
Power consumption (typical)	290 W

Weight and Dimensions

Weight	12500 g