Ir Buffer Assy (1/2) - Pioneer SC-65 Service Manual

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10.28 IR BUFFER ASSY (1/2)

A
*CN6801
AKN7073-A
PRESEL(W/XF)
23
V+7_A
22
21
V-7_A
B
GNDA
20
GNDA
19
SR OUT
18
GNDA
17
SL OUT 16
GNDA 15
FR OUT 14
GNDA 13
C OUT 12
GNDA 11
FL OUT 10
GNDA 9
FH/FWR OUT
8
GNDA 7
FH/FWL OUT 6
GNDA
5
C
SBR OUT
4
GNDA
3
SBL OUT
2
GNDA 1
AA
CN6951
D
PRESEL7
H:FW
L:FH
E
F
N
1/2
140
1
2
V+7_A
V-7_A
GNDA
V+7_A
IC7491
TC4053BFN
16 1
VDD 1Y
2
15
Y-COM 0Y
14 3
X-COM 1Z
13 4
1X Z-COM
12 5
0X 0Z
11 6
A INH
10 7
B VEE
9 8
C VSS
V-7_A
GNDA
R7496
NM
R7497
NM
2
3
FRIN+
FRIN-
N
CIN+
2/2
CIN-
FLIN+
FLIN-
FHRIN+
FHRIN-
N
2/2
FHLIN+
FHLIN-
SC-65
3
4
SBL
*R6904
GGND
C6903
NM
*R6907
1%
*R6906 VCC
22 *R6901
8.2k
2
8
1
1%
8.2k
4
*R6909 *R6908 3
(1/2)
GND
100 8.2k
1%
UPC4570G2-A
1%
*IC6901
*R6903
GGND
SBR
*R6924
GGND
C6923
NM
1% *R6927
*R6926
VCC
*R6921
22 2 8.2k
8
1
1%
8.2k
4
*R6929 *R6928
3
(1/2)
100 8.2k
GND
1% 1%
UPC4570G2-A
*IC6921
GGND *R6923
SL
R6864
1
C6863
NM
1%
*R6867
*R6866
VCC
22
*R6861 8.2k 8.2k
2
8
1 1%
1%
4
R6869 *R6868
3
(1/2)
GND
100 8.2k
1% 1%
UPC4570G2-A
IC6861
R6863
1
SR
R6884
1
C6883
NM
1%
*R6887
*R6886
VCC
22 *R6881
8.2k 8.2k
2
8
1
1%
4
R6889 *R6888 3
(1/2)
GND
100 8.2k
UPC4570G2-A
1%
1%
IC6881
R6883
1
4
V+12SBL
IRMUTEB
1 *R6911
15k
R6919
CH
NM
1% *R6905 *C6907
470
22u/50
1
GNDSBL
V-12SBL
V+12SBR
IRMUTEB
1 *R6931
15k
CH
R6939
NM
1% *R6925 *C6927
470
22u/50
1
GNDSBR
V-12SBR
N
2/2
V+12SL
IRMUTEA
*R6871
15k
CH
R6879
NM
R6865 C6867
470
22u/50
GNDSL
V-12SL
N
2/2
V+12SR
IRMUTEA
*R6891
15k
CH
R6899
NM
R6885 C6887
1%
470
22u/50
GNDSR
V-12SR
1.
U
R
T
2.
U
R
Y
3.