Alto Dragonfly PM-12 Service Manual page 12

1 2
D
C2_4
VR2_4
47uF
B50K
PRECH4
PRECH4
C1_4
682(M)
VR3_4A R6_4
3
500KC
3K
2
R21_4
C10_4
6K2
152(M)
VR3_4B
500KC
C
LD3_4
YEL
(SOLO)
1
2
PGND
3 LOGIC
SW6_4A D1_4
PS-42E85L BAS316
(LOGIC=2.0V or 0.5V)
C13_4 C15_4
100n 100n
+VCC
U1_4C U2_4C
4580M 4580M
-VCC
B
C14_4 C16_4
100n
+RVCC
U4_4C
C17_4
LM393
100n
PGND PGND
A
1 2
3
EQ HI (12K)
MID (FREQ=100Hz-8K)
C8_4
C7_4 VR1_4
6.8n(M) 6.8n(M)
B50K
C5_4 22P
R5_4
R1_4 R2_4
3K9
10K 10K
6
7
5
R11_4 U1_4B
R3_4
5K1
4580M
10K
1
U2_4A
4580M
C12_4
C11_4
33n(M)
33n(M)
R22_4 VR4_4
R24_4
R25_4
6K2 B50K
5K6 5K6
LO (80Hz)
-RVCC
R23_4
2K2
LOGIC
+RVCC
R33_4
10K
R29_4
4148
PGND
100K
100n
D2_4
+RVCC
U3_3B
6 PGND
7
4580M
R32_4
5
82R
D3_4
4148
R31_4
C20_4 R30_4
100K
1uF 8K2
PGND PGND PGND
3
4 5
R8_4
C6_4 5K1
PS-22E85L-2
22P
SW2_4B
4
R7_4
5
1M
6 6
C3_4
5
47uF
2
LEVEL
1 R40_4
3
VR10_4A 5K1
10KD
U1_4A
4580M
+RVCC
R26_4
PS-22E85L-2
3K3 SW2_4A
1
3
LD2_4 MUTE
RED
R4_4
10K
R34_4
10K
U4_4B
R39_4
TR1_4
393
5
27K
7
HR
6
D4_4
C22_4 4148
1uF
R38_4 R35_4
PGND
10K 10K
8
LD4_4
3
TR3_4
LED-2P
1
7002
2
R36_4
紅 綠
4
4K7
C21_4 R51_4
U4_4A
470P 1K
393
PGND
4 5
11
6 7
PAN
C9_4 R41_4
4K7
22P SW5_4A
R9_4
PS-22E85L
5K1
R20_4
2
10K
SW5_4B
7
R10_4
PS-22E85L
5K1
5
W50K
C4_4
U2_4B VR9_4
47uF
4580M
SW3_4A
R12_4
PS-22E85L
5K1
2
4K7
R42_4
SW3_4B
R13_4
PS-22E85L
5K1
5
SW4_4A
R14_4
PS-22E85L
5K1
2
SW4_4B
R15_4
PS-22E85L
2
5K1
PGND
5
SW6_4C
R27_4
PS-42E85L
6K8
8
DIR-OUT4
SW6_4D
R28_4
SW6_4B
PS-42E85L
6K8
PS-42E85L
11
4
5
6
SW1_4A
AUX-POST
PS-22E85L
1
VR7_4
2
W50K
R16_4
3
SW1_4B 5K1
PS-22E85L
4
AUX-POST
5
6
VR8_4
W50K
R17_4
5K1
AUX1/2 PRE/POST
R18_4
AUX-PRE
5K1
VR5_4
W50K
R19_4
AUX-PRE
5K1
VR6_4
W50K
Titel
MAIN INPUT STAGE
PCB# PM16MN1.PCB
Size Model No:
A3
15-Jan-2005
Date:
File: CH4.Sch
6 7
8
PM16MN1 (CH4)
D
1
3
LEFT-BUS
4
6
RIGHT-BUS
1
3
SUB1
4
6
SUB2
1
3
SUB3
C
4
6
SUB4
7
9
AFL-L
10
12
AFL-R
SOLO(PFL)
AUX3
AUX4
B
AUX1
AUX2
A
Revision
ALTO PM16
VER030319
Sheet 4 of 4
Drawn By: KEVIN LIN.
8