Ir Buffer Assy - Pioneer SC-68 Service Manual

1

10.30 IR BUFFER ASSY

A
CN6801
23
PRESEL(W/XF)
V+7_A 22
21
V-7_A
GNDA 20
GNDA 19
SR OUT 18
B
17
GNDA
16
SL OUT
15
GNDA
14
FR OUT
13
GNDA
12
C OUT
11
GNDA
FL OUT 10
9
GNDA
8
FH/FW R OUT
7
GNDA
6
FH/FW L OUT
GNDA
5
SB R OUT 4
GNDA 3
SB L OUT 2
1
GNDA
AKN7073-A
C
AA
CN6951
GNDA
D
PRESEL7
H:FW
L:FH
E
R8901
NM
R8902 R8910
NM NM
R8903 R8911
NM NM
R8904 R8912
NM NM
R8905 R8913
NM NM
R8906 R8914
NM NM
R8907 R8915
NM NM
R8908 R8916
NM NM
R8909 R8917
NM NM
GNDCH1 GNDCH1 GNDCH1
1608 SIZE 2125 SIZE
F
RS1/16S***
2125
RN1/16S***
2125
1/8W
CCSR***
CKSR***
R
146
1
2
V+7_A
V-7_A
V+7_A
IC7491
TC4053BFN
16 1
VDD 1Y
15 2
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
R8918
0
R8919
0
R8920 R8925
0 NM
R8921 R8926
0 NM
R8922 R8927
0 NM
R8923 R8928
0 NM
R8924 R8929
0 NM
0.01u/16
GNDA
GNDCH1 GNDCH1
3216 SIZE
RS1/10S*** RS1/8S***
3216
RS1/8SQ*** RS1/4SA***
3216
1/4W
CCSQ*** CCS***
2125 3216
CKSQ*** CKS***
2
3
R6902
C6906
GNDSBL
R6903
100
GNDA
R6862
C6866
GNDSL
R6863
100
GNDA
R7452
10K
1%
GNDFHL
GNDCH1
R7464
R7453
10K
100
1%
GNDA
GNDC
R6814
100
GNDA
R6842
R6852
10K NM
1%
CFHX
C6849
GNDFR
R6853
GNDCH1
R6854
R6843 NM
10K
100
1%
SC-68
3
4
V+12SBL
*R6909
SBL
1
C6903
NM
R6912 R6906
VCC
39k 1%
2
NM
8
R6910
1
GNDCH1
12
IC6901(1/2)
4
3
0
UPC4570G2-A
GND
330p/50
CH
GND
IC6901(2/2)
5
4
UPC4570G2-A R6911
7 12
8
R6913 R6907
6
VCC
39k 1%
NM
C6904 NM
GNDCH1
*R6908
1
V-12SBL
V+12SL
*R6869
1
C6863
SL
NM
R6872
R6866
VCC
1%
39k
2
NM
8
R6870
1
GNDCH1
12
IC6861(1/2)
4
0 3
UPC4570G2-A
GND
330p/50
CH
GND
IC6861(2/2)
5
4
UPC4570G2-A
R6871
12
7
8
R6873
6 R6867
VCC
39k 1%
NM
NM
C6864
GNDCH1
*R6868
1
V-12SL
V+12FHL
*R7459
1
C7453 FHL
NM
R7456
VCC
39k 1%
2
8
R7460
1
R7462
12
IC7451(1/2)
4
NM 3 UPC4570G2-A
GND
GND
IC7451(2/2)
R7463
5
4
UPC4570G2-A R7461
NM
7 12
8
6 R7457
VCC
39k 1%
C7454 NM
*R7458
1
V-12FHL
V+12C
*R6809
1
C6803
C
NM
R6806
VCC
R6802 39k 1%
2
8
R6810
1
R6812
10K
1% 12
IC6801(1/2)
4
3 UPC4570G2-A
NM
GND
GND
IC6801(2/2)
R6813 5
4
GNDCH1 UPC4570G2-A
R6811
R6803
NM
7 12
8
10K 6 R6807
1%
VCC 39k 1%
C6804 NM
*R6808
1
V-12C
V+12FR
*R6849
1
C6843 FR
NM
R6846
VCC
39k 1%
2
8
R6850
1
12
IC6841(1/2)
4
3 UPC4570G2-A
GND
GND
IC6841(2/2)
5
4
UPC4570G2-A
R6851
7 12
8
R6847
6
VCC
39k
1%
C6844 NM
*R6848
1
V-12FR
4
R693
NM
GNDCH1
R6922
0
C6926
330p/50
GNDSBR
CH
R6923
100
GNDA
R693
NM
GNDCH1
GNDC
R6882
0
C6886 330p/
CH
GNDSR
R6883
100
GNDA
GNDCH1
R7472
10K
1%
GNDFHR
GNDCH1
R7484
R7473
10K
100
1%
GNDA
R6822
2
R6832
10K
1%
NM 3
GNDFL
5
GNDCH1
R6834
R6823
R6833
NM
10K 6
100
1%
GNDA