Sony STR-DH720 Service Manual page 109

2-18. SCHEMATIC DIAGRAM – MAIN Board (3/4) –
1 2 3
A
MAIN BOARD (3/4)
+3.3V 19
NC 18
B
DGND 17
REG_TEMP 16
CL300
HP_RY 15
CL301
PREOUT_SW_ RY 14
CL302
FL-FR_RY 13
DIGITAL
CL303
SBL-R_RY 12
BOARD CL304
BRIDGEABLE_RY 11
F
CL305
(4/4)
C-SLR-RY 10
CL306
C
CN2105 PROTECTOR 9
CL307
LIMITER 8
(Page 11)
CL309
HP_DET 7
CL308
+15V_TUNER 6
CL310
EVOL_DATA 5
CL311
EVOL_CLK 4
CL312
VIDEO2_R 3
CL313
AGND 2
CL314
D
VIDEO2_L 1
CNP410
19P
CNP411
E 19P
CL315
+7V 19
NC 18
CL329
-7V 17
CL316
ADCL OUT 16
AGND 15
CL317
AGND 14
CL318
ADCR OUT 13
DIGITAL
CL319
F DAC FR IN 12
BOARD
CL320
DAC FL IN 11
G
CL321
(4/4)
DAC SW 10
CL322
DAC C 9
CN2114
CL323
DAC SR IN 8
(Page 11)
CL324
DAC SL IN 7
CL333
DAC SBR IN 6
CL325
DAC SBL IN 5
CL326
DCAC 4
G
CL327
TUNER_R 3
CL328
TUNER_L 2
TUNER_L 1
H
I
J
K
STR-DH720/DH720HP
4 5 6
MAIN BOARD (1/4)
(Page 19)
4
17
18
HP
SW
LR
SBL_R
BRIDGE
C_SUR
PROTECTOR
HP_DET
R450 220 C450 100p
R449 220 C449 100p
R388 1k C388 220p
R389 1k C389 220p
CLK
DATA
C546 10 50V
C398 100p
C399 100p
C547 10 50V
C390
3300p
1k
C380 10 50V R380
C391 3300p
C381 10 50V R381 1k
C392 3300p
C382 R382 1k CL381
10 50V
C393 3300p
1k
C383 10 50V R383 CL382
C394 3300p
C384 10 50V R384 1k
C395 3300p
R385 1k
C385 10 50V
C396 3300p
1k
C386 10 50V R386
C397 3300p
10 50V R387 1k CL392
C387
R348 15k
R354 0
R357
1k
7 8 9 10
MAIN BOARD (1/4) MAIN BOARD (2/4)
(Page 19)
5
22 19 20 21
C488
0.1
C489
C499
2200p 2200p
C491
C490
10p 10p
7 0 0 0 -7 0 0 0 0 0 0 0 0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
0 0
GND GND 21
80
0
SUB1 L GND
79 22
78 SUB1 R SUB2L 23
0
GND SUB2R
77 24
0 0
RECL3
76 ADC LOUT 25
0 0
75 ADC ROUT RECR3 26
0
RECL2
74 GND 27
0
RECR2
73 FRIN 28
0
IC400
FLIN RECL1
72 29
BD3470KS2
0
SWIN RECR1
71 IC400 30
0 0
CIN
70 GND 31
DIR FUNCTION SELECT
0 0
SRIN SBL IN2
69 32
0 0
SLIN SBR IN2
68 33
0 0
67 SBRIN SL IN2 34
0 0
SBLIN SR IN2
66 35
0 0
C IN2
65 GND 36
0 0
INR1 SW IN2
64 37
0 0
FL IN2
63 INL1 38
0 0
62 INR2 FR IN2 39
0 0
INL2 GND
61 40
60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
A_GND
C458
C408
4.7 4.7
CL376 CL377 CL378
50V
50V
R408 R458 R403 R453
1k 1k 1k 1k
W002
(ECE)
1 2 3 4 5 6 7
R R
SA-CD/CD TV
AUDIO IN AUDIO IN
L L J401
L R L R
J409
VIDEO 1 VIDEO 1
AUDIO OUT AUDIO IN
21 21
11 12 13
(Page 20)
6
23 24 25 26
IC352
KIA7907PI
IC352
-7V REG
-7
O
G
C353
C323
D352
100
10p
1SR154-400TE-25
16V
C351
C324
100
10p
16V
COM
7
O
IC350
KIA7807API-U/PF
IC350
C471 +7V REG
10
50V
R467
100k
R302
CL379
100
D301
R405 R455
RY301 0.7
DA2J10100L
1k 1k R304
47k
0
Q301
2SC3052EF-T1-LEF
R470
RELAY DRIVER
47k
R466
1k
C405
2200p
C400
2200p
G
J405
L R
SUBWOOFER
AUDIO OUT
SAT/CATV
AUDIO IN
STR-DH720/DH720HP
14 15 16 17
35
MAIN BOARD
8
(4/4)
(Page 22)
36
-15
I
D351 C352
P6SMBJ33A-5 0.47
C350
0.47
15
I 37
MAIN BOARD
9
(4/4)
(Page 22)
38
R301
2.2k
39