Sony STR-DG720 Service Manual page 48

STR-DG720
QQ
3 7 63 1515 0
• IC Block Diagrams
IC400 BD3471KS2 (MAIN BOARD (1/3))
60 59
61
INL2
62
INR2
INL1 63
64
INR1
65
AGND
66
SBLIN1
67
SBRIN1
68
SLIN1
69
SRIN1
70
CIN1
71
SWIN1
72
FLIN1
73
FRIN1
74
AGND
ADC
75
ADCR
TE
L 13942296513
ADCL 76
77
AGND
Sub1
78
SUB1R
79
SUB1L
80
AGND
1
IC500 μPC2581V-S (MAIN BOARD (2/3))
IC600 μPC2581V-S (MAIN BOARD (2/3))
IC700 μPC2581V-S (MAIN BOARD (2/3))
IC800 μPC2581V-S (MAIN BOARD (2/3))
BIAS CIRCUIT
PROTECTOR
PRE
REG DRIVE
DRIVE
1 2 3 4 5 6
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48
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58 57 56 55 54 53 52
Mode Mode
selector selector
FR FL SW C
Volume Volume Volume Volume
EQ
2 3 4 5 6 7 8 9
PRE
DRIVE
DRIVE
7 8 9 10 11 12 13 14 15
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y
i
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8
51 50 49 48 47 46 45 44
Multi2
Multi1
Mode Mode
selector selector
SR SL SBR SBL
Volume Q Q Volume Volume Volume
3 6 7 1 3
Logic
10 11 12 13 14 15 16 17
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.
2 9 9 4 2 8
43 42 41
40
AGND
39
FRIN2
38
FLIN2
37
SWIN2
36
CIN2
35
SRIN2
34
SLIN2
33
SBRIN2
32
SBLIN2
31
AGND
Rec
30
RECR1
29
RECL1
28
RECR2
27
RECL2
26
RECR3
1 5 0 5 8 2 9 9 4
25 RECL3
Sub2
24
RECR4
23
RECL4
22
AGND
21
AGND
18 19 20
m
co
9 9
2 8 9 9