Service manual

AL-1661CS CIRCUIT DIAGRAM 13 - 26
4 3 2 1
4
3 2 1
D C
B A
D C
B A
FAX MAIN PWB (SPEAKER) 2/6
SP OUT
VOL_B VOL_A
VOLCNT_A VOLCNT_B
SPMUTE
BZ
VOL_C
SPOUT
+5V
AG
AG
AG
+5V
AG
+5V+5V
Vref AG
+5V AG
Vref
Vref
Vref
+5V
+5V
GND
AG
AG
GND
AG
AG
C40 A4.7u/50V
R1040 10K
R1043 33K
IC6
BU4051BCF
13 14 15 12
1 5 2 4 6
11 10
9
3 16 7 8
X0 X1 X2 X3 X4 X5 X6 X7 INH A B C
X
VDD
VEE VSS
IC4
BU4051BCF
13 14 15 12
1 5 2 4 6
11 10
9
3 16 7 8
X0 X1 X2 X3 X4 X5 X6 X7 INH A B C
X
VDD
VEE VSS
R1048 62K
C35
F0.1u/16V
R1046 200K
C1028
F0.1u/16V
R1049 18K
R1053
0R
R1035
3.3K
R1052 22k
R43 10k
IC7
NJM2113M
4 3
7
8
5
1
2
6
C1023
4700pF
C28 A4.7u/50V
R1056 200K
CN4
B2B-PH-K-S
1 2
R1039 56k
R1047 5.1k
R1038
1K
C1029 F0.1u/16V(N.M.)
C1026 F0.1u/16V
R44 10k
C1025
F0.1u/16V
R1059 0R
R1037 56k
R1033 56k
R1051 10K(N.M.)
R42 10k
R1050 3.3K
R1044 100K
C37 F0.1u/16V
R1032 20k
C1027 F0.1u/16V(N.M.)
R1034 56k
R1060 0R
R1031 1.6k
C1022 2200pF
C1031 100pF
C42 A4.7u/50V
R1042 10K
R1045 10k
R1058
1k
ZD5 HZS2C1
C1024
F0.1u/16V
C1030 F0.1u/16V(N.M.)
R1054 100k
R1041 1M
R1057 0R
C39
A4.7u/50V
R1055
3.3k
C41
10uF(N.M.)