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SA-XR70E / SA-XR70EB / SA-XR70EG
15.7. POWER CIRCUIT and SPEAKER B TERMINAL CIRCUIT
SCHEMATIC DIAGRAM - 32
POWER CIRCUIT
B1GBCFJA0002
REGULATOR
-15V
+5VA
DCDET
R748
22K
+15V
+5VD
+6VD
IC732
3
+5VA
C755
C756
0.1
50V1
C0CBADC00042
DC-DC CONVERTER
: -B Signal line
: +B Signal line
Q733
R746
R747
Q733
68K
120K
C757
R745
50V4.7
22K
L734
D743
MAZ80560ML
C753
C748
25V100
16V470
R749
2.2K
C752
25V100
L733
D738
1SR35400V
C751
C746
25V100
10V1000P
L732
L732-L734
G0A200D00002
R733
68
R735
150K
2
1
1
2
C754
0.1
IC732
IC731
8
7
R734
47
C740
0.01
1 2 3 4 5 6
W606
TO
MAIN CIRCUIT
(CN606) ON
SCHEMATIC
DIAGRAM - 16
D735-D736
B0HAJL000001
T731
ETS28AU2C9AC
C744
R800
1000P
100
R743
16
D736
22
15
2
R799
C743
1000P
K5G102AA0002
100
14
3
4
D735
13
5
C742
1000P
12
D734
6
11
C741
1000P
10
7
9
D733
D733-D734
B0HANM000012
3
4
IC731
C0DACZZ00007
CURRENT MODE
CONTROLLER
6
5
R739
82K
R740
R738
6.8K
68K
R741
Q732
100
C738
D732
4700P
D732
Q732
B0JAME000025
B1ABCF000011
SWITCH
1 2 3 4
7
8
9
10
CN605A
78
TO
HDMI CIRCUIT
(CN781) ON
SCHEMATIC DIAGRAM - 39
W781
1 2 3 4
D737
B0HAJL000001
C745
1000P
R744
D737
3.3
FP701
C750
10V220
L782
G0A101ZA0028
R783
2.2K
C0DBCMG00001
C732
2SB0621AHA
50V470
B1ABCF000011
Q731
B1DEGL000004
SWITCH
Q731
C716
C735
1000P
220P
R737
D741
10K
R736
1K
D742
C719
C737
R732
50V1
470P
0.82
D741-D742
B0ACCK000005
TH702
8
10
5 6
7
9
11
12
13
14
15
16 17 18
TO
MAIN CIRCUIT
(CN605B) ON
SCHEMATIC
DIAGRAM - 10
D786
B0AACK000004
L781
G0A200D00002
5
1
IC781
2
C781
16V100
4
3
IC781
POWER SUPPLY IC
Q734
STABILIZER
Q735
REGULATOR
Q734
R716
10K
Q735
C758
0.01
R742
18K
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