STR-DH520 - Sony Audio Service Manual (repair manual). Page 4

1-1. Case 

.................................................................................   5

1-2.  HDMI RE PC Board .......................................................   6
1-3.  Front Panel Section .........................................................   6
1-4.  Back Panel Section .........................................................   7
1-5. DIGITAL 

Board 

..............................................................   7

1-6.  MAIN Board Section ......................................................   8
1-7. MAIN 

Board 

...................................................................   8

 ..................................................................   9

 ....................................................   11

4-1.   Block Diagram – TUNER/AUDIO Section – .................   12
4-2.   Block Diagram – DIGITAL Section – .............................   13
4-3.   Block Diagram –
 

STANDBY-A VIDEO MT PC Section – ........................   14

4-4.   Block Diagram – HDMI RE PC Section – ......................   15
4-5.   Block Diagram – KEY/DISPLAY Section – ...................   16
4-6.   Block Diagram – POWER KEY Section – ......................   17
4-7.   Printed Wiring Board – MAIN Board – ..........................   19
4-8.   Schematic Diagram – MAIN Board (1/4) – ....................   20
4-9.   Schematic Diagram – MAIN Board (2/4) – ....................   21
4-10. Schematic Diagram – MAIN Board (3/4) – ....................   22
4-11. Schematic Diagram – MAIN Board (4/4) – ....................   23
4-12. Printed Wiring Board – DIGITAL Board (Side A) – .......   24
4-13. Printed Wiring Board – DIGITAL Board (Side B) – .......   25
4-14. Schematic Diagram – DIGITAL Board (1/4) – ...............   26
4-15. Schematic Diagram – DIGITAL Board (2/4) – ...............   27
4-16. Schematic Diagram – DIGITAL Board (3/4) – ...............   28
4-17. Schematic Diagram – DIGITAL Board (4/4) – ...............   29
4-18. Printed Wiring Board – 
 

STANDBY-A VIDEO MT PC Board – ..........................   30

4-19. Schematic Diagram –
 

STANDBY-A VIDEO MT PC Board – ..........................   31

4-20. Printed Wiring Board – HDMI RE PC Board (Side A) – ....   32
4-21. Printed Wiring Board – HDMI RE PC Board (Side B) – ....   33
4-22. Schematic Diagram – HDMI RE PC Board (1/3) – ........   34
4-23. Schematic Diagram – HDMI RE PC Board (2/3) – ........   35
4-24. Schematic Diagram – HDMI RE PC Board (3/3) – ........   36
4-25. Printed Wiring Board – DCDC Board – ..........................   37
4-26. Schematic Diagram – DCDC Board – .............................   38
4-27. Printed Wiring Board – HEADPHONE Board – .............   38
4-28. Schematic Diagram – HEADPHONE Board – ...............   38
4-29. Printed Wiring Boards – PANEL Section – .....................   39
4-30. Schematic Diagram – PANEL Section – .........................   40
4-31. Printed Wiring Board – TEMP-SENSOR Board – ..........   41
4-32. Schematic Diagram – TEMP-SENSOR Board –.............   41

5-1.   Case Section ....................................................................   53
5-2.   Front Panel Section ..........................................................   54
5-3.   Back Panel Section ..........................................................   55
5-4.   Chassis Section ................................................................   56

 .....................................   57

Note:  Refer to supplement-1 for the printed wiring board, 

schematic diagram and electrical parts list of HDMI RE PC 
board (Suffix-21), Digital board (Suffix-21), DCDC board 
(Suffix-21), MAIN board (Suffix-24) and STANDBY-A 
VIDEO MT PC board (Suffix-24).

NOTICE OF BOARD VERSION CHECK
HDMI RE PC board (Suffi x-11), Digital board (Suffi x-11), DCDC 
board (Suffi x-11), MAIN board (Suffi x-13) and STANDBY-A 
VIDEO MT PC board (Suffi x-13) is synchronised. When any of 
the mounted board replacement is necessary, check the defective 
board version and order the same version of mounted board in part 
list.