Schematic Diagram - Main Section (1/3) - Sony STR-DG720 Service Manual

STR-DG720
Q Q
3 7 6 3 1 5 1 5 0
T E
L 1 3 9 4 2 2 9 6 5 1 3
w w w
STR-DG720
5-9. SCHEMATIC DIAGRAM – MAIN Section (1/3) –
1 2
MAIN BOARD (1/3)
A
JS3002
C3024
4.7 50V
C3022 1
B
C3027 1 R3011
47k 0.5%
R3012
47k 0.5%
C
C430 220p
CNP430
3P
R430 1k
VID2_AU_R
VIDEO 2
F
BOARD VID2_AU_GND
CNP201
VID2_AU_L
(Page 35)
R431 1k
D
C431 220p
J401
6P
-1
L
OUT
-2
R
SA-CD/CD/CD-R
-3
L
IN
-4
R
E
-5
L
TV IN
-6
R
G
J403
4P -1
F
L
SAT AUDIO IN -2
R
-3
L
DVD AUDIO IN
-4
R
G
G
C403
2200p
J404
4P
-1
L
AUDIO OUT -2
R
VIDEO 1
-3
L
AUDIO IN -4
H R
G
C405
2200p
J405
1P
SUB WOOFER AUDIO OUT
JR406
G
I
C400
2200p
J
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y
. i
K
http://www.xiaoyu163.com
• See page 48 for IC Block Diagrams.
3 4 5
C3025 C3034
0.1 6.9 4.7 50V
0
VCC
R3020
C3032 1
0 0 47k
+ -
R3010 R3021
47k 0 0 47k 0.5%
- +
R3022
-6.9 JS3022 C3037
0 47k 0.5%
VEE 1
C3026 R3023
0.1
R3013 47k
47k
IC3002
NJM4565M(TE2)
IC3002
JS3001
DMPORT AMP
JS432
0
C409
INR3 (DCAC_MIC)
4.7 50V
AEP,UK MODEL
0
INL3 (DCAC_MIC)
R409 C459
CC09
INR4
1k 4.7 50V
100p
INL4
R459 0
CC59
INR5
100p 1k JS400
0
INL5
INR6
CC01 R401
INL6
100p 1k
0
INR7
CC51 R451 0
INL7
100p 1k
Q Q
INR8
3 7 6
INL8
0
CC02 R402
INR9
100p 1k
0
INL9
CC52 R452
A_GND
INR10
100p 1k
INL10
0
JS401 INR11
0
INL11
0
INR12
0
INL12
CC03 R403
100p 1k
CC53 R453
100p 1k
CC04 R404
100p 1k
JS409 JS410 JS411
CC54 R454
100p 1k
AEP,UK MODEL JS459 JS460 JS461
R408 C408
1k 4.7 50V JS408
CC08 R458
100p 1k
JS458
CC58
C458
100p
4.7 50V
CC05 R405
100p 1k
CC55 R455
100p 1k
AEP,UK MODEL
C471
4.7
RY301
12V 50V
JS473
R466
0 1k
R470
R467
47k
100k
JS472 JS471 JS470
D301
MA2J1110GLS0
Q301
0.1 R301
2SC3052EF-T1-LEF
RELAY DRIVER 2.2k
0.7
R304
47k
R302 R303
100 100
u 1 6 3
3
MAIN BOARD (3/3)
(Page 28)
26 26
2 4
8 9 9
6 7 8
IC B/D
GND
HPFN
LPF01
LPF02
LPFN2
LPFN1
SWVOL
6.9
VCC
IC400 DGND
0
DATA
IC400
0
CLK
BD3471KS2
3 1 5 1 5 0 8 9
-6.9
ELECTRICAL VOLUME
VEE
0
FROUT
0
FLOUT
0
SWOUT
0
COUT
0
SROUT
0
SLOUT
0
SBROUT
0
SBLOUT
C499 C489
0.1 0.1
C488 C487
47 47
25V 25V
R488 R487
2.2 2.2
AEP,UK MODEL
JR435 0
JR434 0
m
c o
.
2
8 9 9
9 10 11
CNP411
15P
DMPORT R+
JS3037
DMPORT L+
DMPORT R-
DMPORT L-
TUNER L
AGND
DIGITAL
TUNER R
A BOARD
FR IN
(3/3)
AGND CNS501
(Page 33)
FL IN
SBL OUT
SBR OUT
+7V
SL OUT
AGND
CNP410
13P
SR OUT
C OUT
AGND
SW
FL OUT
DIGITAL
AGND
B BOARD
FR OUT
(3/3)
-7V CNS502
(Page 33)
+7V
PROTECTOR
R449
VACS CTRL
1k
C449 100p
VOL IC DATA
C450 100p
VOL IC CLK
R450
1k
2 4 9 8 2 9 9
OUT_FR_1
OUT_FL_1
MAIN
OUT_C_1 1
BOARD
OUT_SR_1
(2/3)
OUT_SL_1 (Page 27)
OUT_SBR_1
OUT_SBL_1
US,CND MODEL
CN434
5P
1 XMR
3 XMGND
XM
G
BOARD
4 XML
CN102
5 -7V
(US,CND)
6 +7V (Page 41)
MAIN
PROTECTOR
2
BOARD
SW_PREOUT_RY
(2/3)
(Page 27)