Schematic Diagram - Main Board (3/4) - Sony STR-DH720 Service Manual

5-16. SCHEMATIC DIAGRAM – MAIN Board (3/4) –
1 2 3
A
MAIN BOARD (3/4)
+3.3V 1
NC 2
B
DGND 3
REG_TEMP 4
CL300
HP_RY 5
CL301
PREOUT_SW_ RY 6
CL302
FL-FR_RY 7
DIGITAL
CL303
SBL-R_RY 8
BOARD CL304
BRIDGEABLE_RY 9
F
CL305
(4/4)
C-SLR-RY 10
CL306
C
CN2105 PROTECTOR 11
CL307
LIMITER 12
(Page 25)
CL309
HP_DET 13
CL308
+15V_TUNER 14
CL310
EVOL_DATA 15
CL311
EVOL_CLK 16
CL312
VIDEO2_R 17
CL313
AGND
18
CL314
D
VIDEO2_L 19
CNP410
19P
CNP411
E 19P
CL315
1
+7V
NC 2
CL329
-7V 3
CL316
ADCL OUT 4
AGND 5
CL317
AGND 6
CL318
ADCR OUT 7
DIGITAL
CL319
F DAC FR IN 8
BOARD
CL320
DAC FL IN
9
G
CL321
(4/4)
DAC SW 10
CL322
DAC C 11
CN2114
CL323
DAC SR IN 12
(Page 25)
CL324
DAC SL IN 13
CL333
DAC SBR IN 14
CL325
DAC SBL IN 15
CL326
DCAC 16
G
CL327
TUNER_R
17
CL328
TUNER_L 18
TUNER_L 19
H
I
J
K
STR-DH720/DH720HP
• See page 49 for IC Block Diagrams.
4 5 6
MAIN BOARD (1/4)
(Page 27)
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
C380 R380 1k
10 50V
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 27)
5
22 19 20 21
C488
0.1
C489
C499
2200p 2200p
C491
C490
10p 10p
7 0 -7 0 0 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
80 GND GND 21
0
SUB1 L GND
79 22
SUB2L
78 SUB1 R 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 29
72
BD3470KS2
0
SWIN RECR1
71 IC400 30
0 0
CIN GND
70 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
29 29
11 12 13
(Page 28)
6
23 24 25 26
IC B/D
-7
C353
C323
D352
100
10p
1SR154-400TE-25
16V
C351
C324
100
10p
16V
7
KIA7807API-U/PF
C471
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 30)
36
IC352
KIA7907PI
IC352
-7V REG
-15
O I
G
C352
0.47
C350
0.47
COM 15
O I 37
IC350
IC350
+7V REG
MAIN BOARD
9
(4/4)
(Page 30)
38
R301
2.2k
39