Alto L-12 Service Manual page 11

1
CH1
CH1.SCH
D
CH2
CH2.SCH
CH3
CH3.SCH
C
CH4
CH4.SCH
B
U4_3C
LM393
A
1
2
LEFT-BUS
RIGHT-BUS
PGND
SUB1
SUB2
SUB3
SUB4
-VCC
AFL-L
AFL-R
SOLO(PFL)
AUX1
AUX2
AUX4
AUX3
LOGIC
+VCC
PH PWR
DIR-OUT4
DIR-OUT3
DIR-OUT2
DIR-OUT1
C14_2 C15_2
C14_3
100n 100n 100n
U4_2C
U3_2C U4_1C
LM393 4580M LM393
C16_2
100n
2
3
2.5-14P-B24A
(TO L12MN1)
CN4
1 L-CUT1-OF
2 L-CUT1-ON
3 TRIM2-CH1
4 TRIM1-CH1
5 INS2-CH1
6 INS1-CH1
7 PH PWR
8 L-CUT2-OF
9 L-CUT2-ON
10 TRIM2-CH2
11 TRIM1-CH2
12 INS2-CH2
13 INS1-CH2
14
15
16
17
18
19
20
L-CUT3-OF
L-CUT3-ON
2.0-5P-B24A
TRIM2-CH3
(TO L12PU1) TRIM1-CH3
INS2-CH3
CN3
INS1-CH3
1 +VCC
2 L-CUT4-OF
3 L-CUT4-ON
4 TRIM2-CH4
5 TRIM1-CH4
INS2-CH4
INS1-CH4
-VCC
C14_1 C14 C15
+RVCC
100n 100n 100n
U4C U3C
LM393 4580M
C16
-RVCC
100n
PGND
3
10
L12MN2(1/5)
CN1
2.0-14P-B24A
(TO L12PU2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CN2
2.0-14P-B24A
(TO L12PU2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
+VCC
R52
C26
47R
C24
47uF 47uF
C25 C27
PGND
R53
47uF 47uF
47R
-VCC
Titel
PCB# L12MN2.PCB
Size Model No:
ALTO L12
A4
11-Jun-2003
Date:
File: L12MN2.Sch
4
D
C
B
A
Revision
VER030530
Sheet 1 of 5
Drawn By: BOW
4