Sony STR-DH720 Service Manual page 108

STR-DH720/DH720HP
2-17. SCHEMATIC DIAGRAM – MAIN Board (2/4) –
1 2 3
MAIN BOARD (2/4)
SR_OUT
A
MAIN
1
2
BOARD
3
1
(1/4) 4
5
(Page 19)
6
7
[SR]
CL400
B
R679
10
R672
R678
L678
100k
4.7
1.7uH CL399
C670
C679 0.01
0.022
C
CL398
R670
47k
CL401
Q661
2SA1514KT146S
R664
CURRENT DETECT
1.5k
0 0
D
-1
C661
220p
R663
0.22
R662
R661
6.2k
4.7k
E
SR +VE
Q653
MN2488-OPY-MK
B C E
MAIN 1 2 3
1 61 0
BOARD
2
8
F
(1/4)
9
C658
(Page 19)
47p
R659
100
R657
82k
0.4
R656
2.2k
G
-1
-0.5
1 0.4
Q651
C657
2SA1175-HFE
47 35V
BIAS
H
IC701
STK350-630TS-E
IC701
PRE DRIVER
15 14 13 12 11
-61 61 61 1
I
10
11
12
13
14
MAIN
15
BOARD
3
R754
(1/4)
68k
J
(Page 19)
R753
2.2k
C762
220
10V
16
C403 C404
10p 10p
K
STR-DH720/DH720HP
4 5 6 7
FL_OUT
SL_OUT
[FL]
CL391
R680 R730
47k
R729 47k
10
R722
100k
R728 R628
L728 CL390 L628
4.7 4.7
1.7uH 1.7uH
CL386 CL384 C720
C729
0.022 0.01
R716
68k
R666
CL383
68k
R720 R715
47k 15k
CL387 CL385
Q711 Q611
R665
2SA1514KT146S 2SA1514KT146S
15k
R714
CURRENT DETECT CURRENT DETECT
1.5k
-1 0 0 0 0 0
-1
Q662
2SA1514KT146S
CURRENT DETECT
-60 -1 -60 Q712
2SA1514KT146S
C611
C711
CURRENT DETECT
220p
220p
R713
0.22
R712
R711
R611
6.2k
4.7k 4.7k
SR -VE FL +VE FL -VE
Q654 Q703 Q704
MP1620-OPY-MK MN2488-OPY-MK MP1620-OPY-MK MN2488-OPY-MK
B C E B C E B C E B
1 2 3
1 2 3 1 2 3 1
-1 -61 0 1 61 0 -1 -61 0 1
C659 C708
C709
47p 47p
47p
R609
R660 R709 R710
100
100 100 100
R658 R707 R708
560
560 82k
R706
0.4
2.2k
Q652 Q702
2SD2144S-V 2SD2144S-V
-1
BIAS
-1 BIAS -0.5 -1
1
0.4
Q701
2SA1175-HFE
C707
BIAS
47 35V
10 9 8 7 6 5 4 3 2 1
0 0 0 0 0 -60 -1 1
C753
10p
C703
10p
C752 C702
C755 100p 100p C705
R704
3p 3p
68k
R752 R702
68k 68k
R751
R701 R703
1k
1k 2.2k
C710 C712
C760
10 220
10
50V 10V
50V
[FR] [FL]
23 24
6
MAIN BOARD (3/4)
(Page 21)
8 9 10
[SL]
R629
R630
10
47k
R622
100k
C629 C620
0.022 0.01
R616
68k
CL388
R620 R615
47k 15k
Q320
2SA1514KT146S
PROTECTOR
CL389
0 -1 0 -60
Q612
R614
2SA1514KT146S
1.5k 0
C320
CURRENT R320
-1 -60 0
220
22k
DETECT
10V
R613 C321
R321
0.22 220
22k
0
10V
0
R612
-60
6.2k
Q323
2SA1514KT146S
PROTECTOR
SL +VE SL -VE
Q603 Q604
MP1620-OPY-MK
C E B C E
R327
1 2 3
2 3
10k
61 0 -1 -61 0
D326
MC2838-T112-1
C608
C609
47p
47p
R610 C325
R326
10
100
R607 R608 39k
50V
82k 560
R606
0.4
2.2k
Q602
2SD2144S-V
BIAS
-1
-0.5 -1
1
Q601 0.4 R328
2SA1175-HFE C607 1k
47 35V
BIAS
IC601
STK350-630TS-E
IC601
PRE DRIVER
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
-61 61 61 1 0 0 0 0 0 -60 -1 1
C653 C603
10p 10p
C655 C652 C602 C605
R654 R604
3p 100p 100p 3p
68k 68k
R652 R602
R546 R545
68k 68k
R653 R603
0.47 0.47
R651
2.2k R601
2.2k
1k
1k
C612
C662
C660 C610
220 220
10 10
10V
10V
50V 50V
[SR] [SL]
25 26
20 20
11 12 13 14
SR_OUT
SL_OUT
R392 R393
330 330
FR_OUT
R394 R395
330 330
FL_OUT
HP_DET
6 5
4 3
1
2
RY375
12V
D375
DA2J10100L
Q375 15
0
2SC3052EF-T1-LEF
RELAY DRIVER
0
Q321
3.3
2SC3052EF-T1-LEF
R377
R378
PROTECTOR 82
47k
0
R375
2.2k
HP
0
Q324
0
2SC3052EF-T1-LEF
PROTECTOR
3.3
D327
MC2838-T112-1
PROTECTOR
R325
6.8k
Q325
2SC2713-G
3.3
PROTECTOR
-61
-61
27 28 29 30 31 32 33 34
7
MAIN BOARD (4/4)
(Page 22)
15 16 17
CN391
5P
CL364 HEADPHONE
1 HP DETECT
BOARD
2 NC
H
CL362
3 R-CH
CN790
4 GND
(Refer to page 45
CL363
5 L-CH
on original
service manual)
D302
C322
1SS367-T3SONY
0.1
ET300 (CHASSIS)
D303
1SS367-T3SONY