Alto Dragonfly PM-12 Service Manual page 13

1
D
CH1 CH5
CH1.SCH CH5.SCH
CH2 CH6
CH2.SCH CH6.SCH
CH3 CH7
C
CH3.SCH CH7.SCH
CH4 CH8
CH4.SCH CH8.SCH
B
C18_1
100n
U3_1C U3_3C
4580M 4580M
A C19_1
100n
PGND
1
2
PRECH1
DIR-OUT1
DIR-OUT1
+VCC
+VCC
-VCC
-VCC
PRECH2
DIR-OUT2
DIR-OUT2
PRECH3
DIR-OUT3
DIR-OUT3
+VCC
+VCC
-VCC
-VCC
PRECH4
DIR-OUT4
DIR-OUT4
C18_3 C18_5
100n 100n
U3_5C U3_7C
4580M 4580M
C19_3 C19_5 C19_7
100n 100n 100n
PGND PGND
2
3
(TO PM12PU1)
CN1
2.0-12P
12 PRECH5
GND
11
DIR-OUT5
10 DIR-OUT5
GND
9
+VCC
8 +VCC
GND
7
GND
6
-VCC
5 -VCC
GND
4
3 PRECH6
GND
2
DIR-OUT6
1 DIR-OUT6
(TO PM12PU1)
CN2
2.0-12P
12 PRECH7
GND
11
DIR-OUT7
10 DIR-OUT7
GND
9
+VCC
8 +VCC
GND
7
GND
6
-VCC
5 -VCC
GND
4
3 PRECH8
GND
2
DIR-OUT8
1 DIR-OUT8
R1
C18_7
+RVCC 0R +PVCC
100n
C1 C3
47uF 47uF
C2 C4
47uF 47uF
-RVCC R2 -PVCC
PGND 0R
3
12
PM12MN1
(TO PM12PU1)
CN3
2.0-12P
12
GND
11
10
GND
9
8
GND
7
GND
6
5
GND
4
3
GND
2
1 AUX1
AUX2
AUX3
AUX4
SUB1
SUB2
(TO PM12PU1)
SUB3
SUB4
CN4
LEFT-BUS
2.0-12P
RIGHT-BUS
12 SOLO(PFL)
GND
11 AFL-L
10 AFL-R
GND
9 LOGIC
8 +RVCC
GND
7 PGND
GND
6 PGND
5 -RVCC
GND
4
3
GND
2
1
Titel
MAIN INPUT STAGE
PGND
PCB# PM12MN1.PCB
Size Model No:
ALTO PM12
A3
19-Feb-2005
Date:
File: PM12MN1.Sch
4
D
CON4
CN6
1
2
3
4
CN5
1
2 C
3
4
5
6
7
8
9
10
11
12
13
14
CON14
(TO PM12MN2)
B
A
Revision
VER030319
Sheet 0 of 8
Drawn By: KEVIN LIN.
4