Sony STR-DB798 Service Manual

3
STR-DB798
TABLE OF CONTENTS
7. EXPLODED VIEWS
7-1. Overall Section ................................................................ 69
7-2. Back Panel Section .......................................................... 70
7-3. Main Board Section ......................................................... 71
7-4. Heat Sink Section ............................................................ 72
7-5. Chassis Section................................................................ 73
7-6. Front Panel Section ......................................................... 74
7-7. Panel Base Section .......................................................... 75
8. ELECTRICAL PARTS LIST................................ 76
1. SERVICING NOTES ............................................... 4
2. GENERAL ................................................................... 6
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 7
3-2. Case ................................................................................. 7
3-3. COMP-V Board............................................................... 8
3-4. Back Panel Block ............................................................ 8
3-5. DIGITAL Board, A/V SYNC Board ............................... 9
3-6. STAY-5/AU-IN/VIDEO-AU/VIDEO/S-VIDEO/
SPK-A/SPK-B Board ...................................................... 9
3-7. MAIN Board Block ......................................................... 10
3-8. MAIN Board.................................................................... 10
4. TEST MODE.............................................................. 11
5. ELECTRICAL ADJUSTMENTS ......................... 12
6. DIAGRAMS
6-1. Block Diagram − TUNER/VIDEO Section − ................. 13
6-2. Block Diagram − AUDIO DSP Section − ....................... 14
6-3. Block Diagram − AUDIO CONTROL Section − ............ 15
6-4. Block Diagram − AUDIO AMP Section − ...................... 16
6-5. Block Diagram − DISPLAY, KEY CONTROL
Section − .......................................................................... 17
6-6. Block Diagram − POWER SUPPLY Section − ............... 18
6-7. Printed Wiring Board − DIGITAL Board
(Component Side) − ....................................................... 20
6-8. Printed Wiring Board − DIGITAL Board
(Conductor Side) − ......................................................... 21
6-9. Schematic Diagram − DIGITAL Board (1/4) −............... 22
6-10. Schematic Diagram − DIGITAL Board (2/4) −............... 23
6-11. Schematic Diagram − DIGITAL Board (3/4) −............... 24
6-12. Schematic Diagram − DIGITAL Board (4/4) −............... 25
6-13. Printed Wiring Board − A/V SYNC Board − .................. 26
6-14. Schematic Diagram − A/V SYNC Board − ..................... 27
6-15. Printed Wiring Boards − VIDEO Section − ................... 28
6-16. Schematic Diagram − VIDEO Section − ......................... 29
6-17. Printed Wiring Boards − S-VIDEO Section −................. 30
6-18. Schematic Diagram − S-VIDEO Section − ..................... 31
6-19. Printed Wiring Board − COMP-V Board − .................... 32
6-20. Schematic Diagram − COMP-V Board −........................ 33
6-21. Printed Wiring Board − AU-IN Board −......................... 34
6-22. Schematic Diagram − AU-IN Board − ............................ 35
6-23. Printed Wiring Board − MAIN Board − .......................... 36
6-24. Schematic Diagram − MAIN Board (1/3) − .................... 37
6-25. Schematic Diagram − MAIN Board (2/3) − .................... 38
6-26. Schematic Diagram − MAIN Board (3/3) − .................... 39
6-27. Printed Wiring Board − A CLASS Board − .................... 40
6-28. Printed Wiring Boards − STAY Section − ....................... 41
6-29. Schematic Diagram − A CLASS Section (1/2) − ............ 42
6-30. Schematic Diagram − A CLASS Section (2/2) − ............ 43
6-31. Printed Wiring Boards − SPEAKER Section − ............... 44
6-32. Schematic Diagram − SPEAKER Section − ................... 45
6-33. Printed Wiring Boards − DISPLAY Section − ................ 46
6-34. Schematic Diagram − DISPLAY Section − .................... 47
6-35. Printed Wiring Boards − DC Section − ........................... 48
6-36. Schematic Diagram − DC Section − ............................... 49
6-37. Printed Wiring Board − AC Board − ............................... 50
6-38. Schematic Diagram − AC Board − .................................. 51

Sony STR-DB798 Specifications

General

Impedance	8 Ω
Supported radio bands	FM
Radio Data System (RDS)	Yes
Channels quantity	7 channels
I/O ports	Output(Component x 1, Optical Digital x 1, Composite x 1, S-Video x 1), Input(Component x 2, Optical Digital x 4, S-Video x 4, Coaxial Digital x 2, Composite x 4)