1
2
3
4
5
6
7
8
9
10
11
12
A
B
C
D
12
11
10
9
8
7
6
5
4
3
2
1
D
C
B
A
L12PU2-2.Sch
Titel
Size
File:
Date:
Drawn By:
Sheet
Revision
Model No:
11-Jun-2003
BOW
MAIN INPUT STAGE
2
2 of
ALTO L12
VER030530
A4
PCB# L12PU2.PCB
L12PU2-2
C63
100n
C64
100n
C65
100n
C66
100n
C67
100n
C68
100n
C69
100n
C70
100n
8
4
U1_1C
4580M
8
4
U2_1C
4580M
8
4
U2C
4580M
8
4
U1C
4580M
+VCC
-VCC
C71
100n
C72
100n
C73
100n
C74
100n
C75
100n
C76
100n
C77
100n
C78
100n
8
4
U1_3C
4580M
8
4
U2_3C
4580M
8
4
U2_2C
4580M
8
4
U1_2C
4580M
(TO L12MN1)
+VCC
-VCC
TRIM2-CH1
TRIM1-CH1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CN2
2.5-14P-B24A
INS2-CH1
INS1-CH4
L-CUT1-ON
L-CUT4-OF
L-CUT1-OF
L-CUT4-ON
INS1-CH1
INS2-CH4
TRIM1-CH4
PH PWR
TRIM2-CH4
TRIM2-CH2
INS1-CH3
TRIM1-CH2
L-CUT3-OF
INS2-CH2
L-CUT3-ON
L-CUT2-ON
INS2-CH3
L-CUT2-OF
TRIM1-CH3
INS1-CH2
TRIM2-CH3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CN1
2.5-14P-B24A
(TO L12MN1)
8
4
U3C
4580M
8
4
U4C
4580M
8
4
U5C
4580M
8
4
U3_1C
4580M
8
4
U4_1C
4580M
8
4
U5_1C
4580M
C25
100n
C27
100n
C29
100n
C31
100n
C33
100n
C35
100n
C24
100n
C26
100n
C28
100n
C30
100n
C32
100n
C34
100n
3c
5e
1a
4d
2b
X7
JY-6351G-02-250
T
R
S
RN
TN
LINE IN 9
3c
5e
1a
4d
2b
X8
JY-6351G-02-250
T
R
S
RN
TN
LEFT(MONO)
RIGHT
3
2
1
U6A
4580M
R88
20K
C103
22P
C107
47u/25V
R84
10K
C99
22P
R76
10K
C91
100P
R78
10K
C93
100P
5
6
7
U6B
4580M
R90
20K
C105
22P
C109
47u/25V
R86
10K
C101
22P
R80
10K
C95
100P
R82
10K
C97
100P
LINE IN 10
3c
5e
1a
4d
2b
X9
JY-6351G-02-250
T
R
S
RN
TN
LINE IN 11
3c
5e
1a
4d
2b
X10
JY-6351G-02-250
T
R
S
RN
TN
LEFT(MONO)
RIGHT
3
2
1
U7A
4580M
R89
20K
C104
22P
C108
47u/25V
R85
10K
C100
22P
R77
10K
C92
100P
R79
10K
C94
100P
5
6
7
U7B
4580M
R91
20K
C106
22P
C110
47u/25V
R87
10K
C102
22P
R81
10K
C96
100P
R83
10K
C98
100P
LINE IN 12
(TO L12MN1)
TRIM2-CH5
TRIM1-CH5
L-CUT5-ON
L-CUT5-OF
INS-CH5
INS-CH6
TRIM2-CH7
TRIM1-CH7
L-CUT7-ON
L-CUT7-OF
INS-CH7
INS-CH8
8
4
U6C
4580M
8
4
U7C
4580M
8
4
U11C
4580M
8
4
U10C
4580M
8
4
U8C
4580M
8
4
U9C
4580M
C80
100n
C82
100n
C84
100n
C86
100n
C88
100n
C90
100n
C79
100n
C81
100n
C83
100n
C85
100n
C87
100n
C89
100n
INS-CH5-6
INS-CH7-8
PHONES-L
PHONES-R
2TKIN-R
2TKIN-L
MAIN-R-3
MAIN-L-3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CN4
2.5-14P-B24A
(TO L12MN1)
+VCC
-VCC
INS-CH9
INS-CH10
INS-CH11
INS-CH12
INS-CH9
INS-CH10
INS-CH11
INS-CH12
MAIN-L-3
MAIN-R-3
2TKIN-L
2TKIN-R
1
4
2
5
3
6
X13
SCP6873NS3232
TAPE OUT
TAPE IN
R(RED)
L(WHITE)
R32
1K
R31
1K
PHONES-R
PHONES-L
PHONES OUTPUT
C112
22P
R93
10K
5
6
7
U10B
BA15218N
3
2
1
U10A
BA15218N
R97
120R
R99
120R
PHONES B
R103
120R
3c
5e
1a
4d
2b
X12
JY-6351G-02-250
R101
120R
R95
10K
C114
22P
5
6
7
U11B
BA15218N
3
2
1
U11A
BA15218N
C111
22P
R92
10K
5
6
7
U8B
BA15218N
3
2
1
U8A
BA15218N
R96
120R
R98
120R
PHONES A
R102
120R
3c
5e
1a
4d
2b
X11
JY-6351G-02-250
R100
120R
R94
10K
C113
22P
5
6
7
U9B
BA15218N
3
2
1
U9A
BA15218N
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
CN3
2.5-14P-B24A
Summary of Contents for L-12
Page 24: ......
Page 25: ......
Page 26: ......
Page 27: ......
Page 28: ......
Page 29: ......
Page 30: ......
Page 31: ......
Page 32: ......
Page 33: ......
Page 34: ......
Page 35: ......
Page 36: ......
Page 37: ......
Page 38: ......
Page 39: ......
Page 40: ......
Page 41: ......
Page 42: ......
Page 43: ......
Page 75: ......