Alto Dragonfly PM-12 Service Manual page 9

1 2
D
C2_1
VR2_1
47uF
B50K
PRECH1
PRECH1
C1_1
682(M)
R6_1
VR3_1A
3
3K
500KC
2
R21_1
C10_1
6K2
152(M)
VR3_1B
500KC
C
LD3_1
YEL
(SOLO)
1
2
PGND
3 LOGIC
SW6_1A D1_1
PS-42E85L BAS316
(LOGIC=2.0V or 0.5V)
C13_1 C15_1
100n 100n
+VCC
U1_1C U2_1C
4580M 4580M
-VCC
B
C14_1 C16_1
100n
+RVCC
U4_1C
C17_1
LM393
100n
PGND PGND
A
1 2
3
EQ HI (12K)
MID (FREQ=100Hz-8K)
C8_1
C7_1 VR1_1
C5_1 6.8n(M) 6.8n(M)
B50K
22P
R5_1
R1_1 R2_1
3K9
10K 10K
6
7
5
R11_1 U1_1B
R3_1
5K1
4580M
10K
1
U2_1A
4580M
C12_1
C11_1
33n(M)
33n(M)
R22_1 VR4_1
R24_1 R25_1
6K5 B50K
5K6 5K6
LO (80Hz)
-RVCC
R23_1
2K2
LOGIC
+RVCC
R33_1
R29_1 10K
100K
4148
PGND
100n
D2_1
+RVCC
U3_1A
2 PGND
1
4580M R32_1
3
82R
D3_1
4148
R31_1
R30_1
C20_1
100K
8K2
1uF
PGND PGND PGND
3
4 5
R8_1
LEVEL
5K1
C6_1
PS-22E85L-2
22P
SW2_1B
4
R7_1
5
VR10_1A
1M
6 6
10KD
C3_1
5
47uF
2
1 R40_1
3
5K1
U1_1A
4580M
+RVCC
R26_1
3K3
1
3
LD2_1
RED
R4_1
10K
R34_1 TR1_1
10K U4_1B
HR
R39_1
393
5
27K
7
6
D4_1
C22_1 4148
1uF
R38_1 R35_1
TR3_1
PGND
10K 10K
7002
8
LD4_1
3
R36_1
LED-2P
1
2
4K7
紅 綠
4
U4_1A
R51_1
C21_1
393 1K
470P
PGND
4 5
8
6 7
PM16MN1 (CH1)
PAN
C9_1 R41_1
4K7
22P SW5_1A
R9_1
PS-22E85L
5K1
R20_1 2
10K
SW5_1B
7
R10_1
PS-22E85L
5K1
5
W50K
C4_1
U2_1B VR9_1
47uF
4580M
SW3_1A
R12_1
PS-22E85L
5K1
2
4K7
R42_1
SW3_1B
R13_1
PS-22E85L
5K1
5
SW4_1A
R14_1
PS-22E85L
5K1
2
PS-22E85L-2
SW2_1A
SW4_1B
2
R15_1
PGND
PS-22E85L
5K1
5
MUTE
SW6_1C
R27_1
PS-42E85L
6K8
8
DIR-OUT1
SW6_1D
R28_1
SW6_1B
PS-42E85L
6K8
PS-42E85L
11
4
5
6
SW1_1A
AUX-POST
PS-22E85L
1
VR7_1
2
W50K
R16_1
3
SW1_1B 5K1
PS-22E85L
4
AUX-POST
5
6
VR8_1
W50K
R17_1
5K1
AUX1/2 PRE/POST
R18_1
AUX-PRE
5K1
VR5_1
W50K
R19_1
AUX-PRE
5K1
VR6_1
W50K
Titel
MAIN INPUT STAGE
PCB# PM16MN1.PCB
Size Model No:
A3
15-Jan-2005
Date:
File: CH1.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 1 of 4
Drawn By: KEVIN LIN.
8