Schematic Diagram - Main Board (3/3) - Sony STR-DG820 Service Manual

6-9.

SCHEMATIC DIAGRAM - MAIN Board (3/3) -

1 2 3
MAIN BOARD (3/3)
CNP912
7P
A
R2 RETURN GND 1
HP_GND 2
K
-15V 3
STBY GND 4
STANDBY
BOARD R2 GND 5
CN722
(Page +15V 6
+15V 7
47)
B
70
71
72
73
D327
74
75
1
76
C
77
MAIN
78
BOARD
(1/3)
79
(Page 21)
80
81
82
83
D 84
CN792
5P
1
HP DETECT
E
NC 2
R-CH 3
FRONT
GND 4
V2
BOARD
L-CH 5
CN721
(Page 43)
CN350
E 9P
1
HP_DET
NC 2
R375 2.2k
3
HP_RY
F
C/SR/SBL RY 4
5
FRONT_A/B
MICOM
SW_PREOUT_RY 6
BOARD
CN7005
FRONT_A_RY 7
(Page 37)
F
SBR_RY 8
BRIDGEABLE RY 9
CN603
7P
C 1
NC 2
P
C_GND 3
NC 4
SPEAKER
G BOARD
NC 5
CN286
SL 6
(Page 44)
SL_GND 7
CN602
8P
SBR_GND 8
SBR 7
N
NC 6
H
5
SBL_GND
SPEAKER SBL 4
BOARD
CN285 3
NC
(Page 44)
SR_GND 2
1
SR
97
3
98
I
99
(Page
MAIN
100
BOARD
22)
(2/3)
101
CN500
4P
G
+15V 1
NC 2
VIDEO
GND 3
BOARD
CNP203
-15V 4
J (Page 41)
C351
CNP500
100
H 3P
16V
-7V 3
FRONT
GND 2
V2
BOARD
+7V 1
CN725
(Page 43)
TA7807S
K
L
STR-DG820
4 5 6
∗R511
330 2W (US, CND)
470 2W (AEP, ECE, UK)
D326
R327 Q500, 501
MA2J1110GLS0
10k
LIMITTER SWITCH
Q500
2SC1815GR-TPE2
R325 6.8k
Q325
2SC3052EF-T1-LEF R501
3.6
R511
10k
∗
-35.7 (AEP, ECE, UK) -35.6
JS510 D500
-35.1
MAZ8300GMLS0
R326
39k R328
-35.7 R510
1k R502
100
470k
-35.9
2W
C325 10 50V
MA2J1110GLS0
(US, CND)
R392
-1
680
2W
R393
-2
RY375 680
2W
Q375
16
2SC3052EF-T1-LEF
RELAY DRIVE
R377 R376
D375
47 33
MA2J1110GLS0
0.5
R378
47k
JS350 JS551
JS553
JS552
R370 R360 R355
2.2k 1k 1k
R372 R362
R373 47 R363 47 R358
47k 47k 47k
0.7 0.7 0.7
R371 R361
33 33
D370 D360 D355
MA2J1110GLS0 MA2J1110GLS0 MA2J1110GLS0
0.1 0.1 0.1
RY370 RY360 RY355
-2 -2 -2
-1 -1 -1
D352 1SR154-400TE-25
C350
3
0.47
-6.9 G -17.1
O I
2 1
C353
3
100
16V
7 G 16 IC352
O I TA79007SB
2 1
IC352
IC350 IC350
-7V REGULATOR
+7V REGULATOR
7 8 9 10
Q320, 321, 323-325
AF POWER PROTECTOR
Q501
RT1P241C-TP-1 D325
MA2J1110GLS0
-35.1
6.3 6.4
0
Q323
2SA1163L-TE85L
-5.5
-35.1 3.8
2SC3052EF-T1-LEF
0 0
Q320
2SA1163L-TE85L
2SC3052EF-T1-LEF
R320 R323
20k 39k
R365 R350
2.2k 2.2k
R357 R367 R352
47 R368 47 R353 47
47k 47k
0.7 0.7
R356 R366 R351
33 33 33
D365 D350
MA2J1110GLS0 MA2J1110GLS0
0.1 0.1
R922
47
RY365 RY350
-2 -2
JS555
-1 -1
JR398 JR399
JS554
0 0
R301
2.2k
C471 4.7 50V
JS473
JS470 JS471 R467
100k R466
R470
47k 1k
R304
47k
JS472
Q301
0.7
2SC3052EF-T1-LEF
RELAY DRIVE
RY301
0
C400
2200p
R303 R302
100 100
D301
MA2J1110GLS0
J405
(CHASSIS)
SUB WOOFER
AUDIO OUT
23 23
11 12 13
R503
10k
D940 1SR154-400TE-25
D941
1SR154-400TE-25
IC565
1 2 3 4
D942
1SR154-400TE-25
OVER LOAD DETECTOR
IC565
NJM4565M(TE2)
D943 1SR154-400TE-25
R940
0.15
8 7 6 5
Q324 1/2W
3.8
0
R507
R504
220k 10k
Q321
C500
0.1
R505 10k
R506 47k
R921 R923
2.2k 47k
0.6
Q920
2SC3052EF-T1-LEF
16
RELAY DRIVE
C920
C921
0.22 0.22
100V 100V
C922
0.01F
71V
RY920
(AEP, ECE, UK)
-1 RR12
10
~
-2
~ JS392
D921
D5SBA20-4003
JS393
R920 D920
CC11
33 MA2J1110GLS0
0.01
JS390
JS395
JS391
CC13
0.01
CC14
0.01
STR-DG820
14 15 16
CN941
3P
L
1
GND (R4)
2 +7V (R4)
STANDBY
3 BOARD
GND (R4)
CN914
(Page 47)
C904
CNP940
3300
6P
16V
6 R4 +AC
J
5
R4 -AC
4 F2
3 MAIN POWER
GND
TRANSFORMER
2 NC T901
1 (Page 47)
F1
CNP920
5P
5
R1 (UPPER TAP)
M
4 R1 (LOWER TAP)
3
R1 GND
MAIN POWER
2
R1 (LOWER TAP) TRANSFORMER
T901
1
R1 (UPPER TAP) (Page 47)
CC12
0.01
JS394
- L
- R
TB601
FRONT A
+ L
RR11
+ R
10
SPEAKERS
+ L
- L
TB603
FRONT B
+ R
- R
JS397
RR13
10
RR14
10
4
W001-002
MAIN
BOARD
(2/3)
(Page 22)