Alto Dragonfly PM-12 Service Manual page 11

1 2
D
C2_3
VR2_3
47uF
B50K
PRECH3
PRECH3
C1_3
682(M)
R6_3
VR3_3A
3
3K
500KC
2
R21_3
C10_3
6K2
152(M)
VR3_3B
500KC
C
LD3_3
YEL
(SOLO)
1
2
PGND
3 LOGIC
SW6_3A D1_3
PS-42E85L BAS316
(LOGIC=2.0V or 0.5V)
C13_3 C15_3
100n 100n
+VCC
U1_3C U2_3C
4580M 4580M
-VCC
B
C14_3 C16_3
100n
+RVCC
U4_3C
C17_3
LM393
100n
PGND PGND
A
1 2
3
EQ HI (12K)
MID (FREQ=100Hz-8K)
C8_3
C7_3 VR1_3
6.8n(M) 6.8n(M)
B50K
C5_3 22P
R5_3
R1_3 R2_3
3K9
10K 10K
6
7
5
R11_3
R3_3
U1_3B
5K1
10K
4580M
1
U2_3A
4580M
C12_3
C11_3
33n(M)
33n(M)
R22_3 VR4_3
R24_3
R25_3
6K5 B50K
5K6 5K6
LO (80Hz)
-RVCC
R23_3
2K2
LOGIC
+RVCC
R33_3
10K
R29_3
4148
PGND
100K
100n
D2_3
+RVCC
U3_3A
2 PGND
1 R32_3
4580M
3
D3_3
82R
4148
R31_3
100K C20_3 R30_3
1uF 8K2
PGND PGND PGND
3
4 5
R8_3
5K1
C6_3
PS-22E85L-2
22P
SW2_3B
4
R7_3
5
1M
6 6
C3_3
5
47uF
2
1
LEVEL
3 R40_3
VR10_3A
5K1
10KD
U1_3A
4580M
+RVCC
R26_3
PS-22E85L-2
3K3
SW2_3A
1
2
3
LD2_3
MUTE
RED
R4_3
10K
R34_3
U4_3B
10K
R39_3
TR1_3
393
5 27K
7
HR
6
D4_3
C22_3
4148
1uF
R38_3 R35_3
PGND
10K 10K
8
LD4_3
3
TR3_3
LED-2P
1
7002
2
R36_3
紅 綠
4
4K7
C21_3
U4_3A R51_3
470P
1K
393
PGND
4 5
10
6 7
PM16MN1 (CH3)
PAN
C9_3
R41_3
22P SW5_3A
R9_3
4K7
PS-22E85L
5K1
R20_3
2
10K
SW5_3B
7
R10_3
PS-22E85L
5K1
5
C4_3
U2_3B W50K
47uF
VR9_3
4580M
SW3_3A
R12_3
PS-22E85L
5K1
2
4K7
R42_3
SW3_3B
R13_3
PS-22E85L
5K1
5
SW4_3A
R14_3
PS-22E85L
5K1
2
SW4_3B
R15_3
PGND
PS-22E85L
5K1
5
SW6_3C
R27_3
PS-42E85L
6K8
8
DIR-OUT3
SW6_3D
R28_3
SW6_3B
PS-42E85L
6K8
PS-42E85L
11
4
5
6
SW1_3A
AUX-POST
PS-22E85L
1
VR7_3
2
W50K
R16_3
3
SW1_3B
5K1
PS-22E85L
4
AUX-POST
5
6
VR8_3
W50K
R17_3
5K1
AUX1/2 PRE/POST
R18_3
AUX-PRE
5K1
VR5_3
W50K
R19_3
AUX-PRE
5K1
VR6_3
W50K
Titel
MAIN INPUT STAGE
PCB# PM16MN1.PCB
Size Model No:
A3
15-Jan-2005
Date:
File: CH3.Sch
6 7
8
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 3 of 4
Drawn By: KEVIN LIN.
8