Alto L-12 Service Manual page 10

1 2 3
R76
10K
D
R
3c
4d RN
LINE IN 9
2b TN C91
1a T
100P
LEFT(MONO)
5e S
R78
10K
X7
JY-6351G-02-250
C93
C99
100P
22P
R80
10K
R
3c
RN
4d
LINE IN 10
2b TN C95
T 100P
1a
RIGHT
S
5e R82
10K
X8
JY-6351G-02-250
C97 C101
100P 22P
C
R77
10K
3c R
RN
4d
LINE IN 11
2b TN C92
T
1a 100P
LEFT(MONO)
S
5e
R79
10K
X9
JY-6351G-02-250
C94
C100
100P
22P
R81
10K
3c R
4d RN
LINE IN 12
2b TN C96
1a T 100P
RIGHT
5e S
R83
10K
X10
JY-6351G-02-250
C98 C102
100P
22P
B
C24 C26
100n 100n
+VCC
U1_3C U2_3C
4580M 4580M
-VCC
C25 C27
100n 100n
A
1 2 3
4 5
C103
22P
R88 C107 PHONES-R
20K 47u/25V
2
1 INS-CH9
3
U6A
4580M
R84
10K
PHONES-L
C105
22P
R90
C109
20K 47u/25V
6
7 INS-CH10
5
U6B
R86 4580M
10K
C104
22P
R89 C108
20K 47u/25V
2
1 INS-CH11
3
U7A
4580M
R85
10K
C106
22P
R91 C110
20K
47u/25V
6
7
INS-CH12
5
U7B
4580M
R87
10K
C28 C30 C32 C34 C63 C65
100n 100n 100n 100n 100n 100n
U1_2C U2_2C U3_1C U4_1C
U1_1C U2_1C
4580M 4580M 4580M 4580M 4580M 4580M
C29 C31 C33 C35 C64 C66
100n 100n 100n 100n 100n 100n
4 5
6 7 8
C111 3c
4d
22P
R96
2b
R92
120R 1a
10K
2 6 5e
1 7
X11
3 5
R98 JY-6351G-02-250
U8A
U8B 120R
BA15218N
BA15218N
C113
22P
R100
120R
R94
10K
2 6
PHONES OUTPUT
1 7
3 5
R102
U9A U9B
120R
BA15218N BA15218N
C112 3c
4d
22P
R97
2b
R93
120R
1a
10K
2 6 5e
1 7
X12
3 5
R99 JY-6351G-02-250
U10A
U10B
BA15218N 120R
BA15218N
C114
22P
R101
R95 120R
10K
2 6
1 7
3 5
R103
U11A U11B
120R
BA15218N BA15218N
TAPE IN TAPE OUT
X13
SCP6873NS3232
1 4
L(WHITE)
MAIN-L-3
R31
1K
2 5
R(RED)
MAIN-R-3
R32
1K
2TKIN-L
2TKIN-R
C67 C69 C71 C73 C75 C77
100n 100n 100n 100n 100n 100n
U5_1C U1C U2C U3C U4C U5C
4580M 4580M 4580M 4580M 4580M 4580M
C68 C70 C72 C74 C76 C78
100n 100n 100n 100n 100n 100n
6 7 8
9
9 10
CN1
2.5-14P-B24A
PHONES A (TO L12MN1)
L-CUT1-OF 1
L-CUT1-ON 2
TRIM2-CH1 3
TRIM1-CH1 4
INS2-CH1 5
INS1-CH1 6
PH PWR 7
L-CUT2-OF 8
L-CUT2-ON 9
TRIM2-CH2 10
TRIM1-CH2 11
INS2-CH2 12
INS1-CH2 13
14
PHONES B CN2
2.5-14P-B24A
(TO L12MN1)
L-CUT3-OF 1
L-CUT3-ON 2
TRIM2-CH3 3
TRIM1-CH3 4
INS2-CH3 5
INS1-CH3 6
+VCC 7
L-CUT4-OF 8
L-CUT4-ON 9
TRIM2-CH4 10
TRIM1-CH4 11
INS2-CH4 12
INS1-CH4 13
-VCC 14
CN3
2.5-14P-B24A
(TO L12MN1)
L-CUT5-OF 1
L-CUT5-ON 2
TRIM2-CH5 3
TRIM1-CH5 4
INS-CH5-6 5
INS-CH5 6
INS-CH6 7
L-CUT7-OF 8
L-CUT7-ON 9
TRIM2-CH7 10
TRIM1-CH7 11
INS-CH7-8 12
INS-CH7 13
INS-CH8 14
15
CN4
2.5-14P-B24A
(TO L12MN1)
1
-VCC 2
3
+VCC 4
2TKIN-R 5
2TKIN-L 6
MAIN-R-3 7
MAIN-L-3 8
PHONES-L 9
PHONES-R 10
INS-CH12
11
INS-CH11
12
INS-CH10
13
INS-CH9
14
C79 C81 C83 C85 C89 C87
100n 100n 100n 100n 100n 100n
U7C U8C
U6C U9C U10C U11C
4580M 4580M 4580M
4580M 4580M 4580M
C80 C82 C84 C86 C90 C88
100n 100n 100n 100n 100n 100n
Titel
Size
Date:
File:
9 10
11 12
L12PU2-2
D
C
B
A
MAIN INPUT STAGE
PCB# L12PU2.PCB
Model No: Revision
A4 ALTO L12
VER030530
11-Jun-2003 Sheet 2 of 2
L12PU2-2.Sch Drawn By: BOW
11 12