Alto Dragonfly PM-12 Service Manual page 10

1 2
D
C2_2
VR2_2
47uF
B50K
PRECH2
PRECH2
C1_2
682(M)
R6_2
VR3_2A
3
3K
500KC
2
R21_2
C10_2
6K2
152(M)
VR3_2B
500KC
C
LD3_2
YEL
(SOLO)
1
2
PGND
3 LOGIC
SW6_2A D1_2
PS-42E85L BAS316
(LOGIC=2.0V or 0.5V)
C13_2 C15_2
100n 100n
+VCC
U1_2C U2_2C
4580M 4580M
-VCC
B
C14_2 C16_2
100n
+RVCC
U4_2C
C17_2
LM393
100n
PGND PGND
A
1 2
3
EQ HI (12K)
MID (FREQ=100Hz-8K)
C8_2
C7_2 VR1_2
6.8n(M) 6.8n(M)
B50K
C5_2 22P
R5_2
R1_2 R2_2
3K9
10K 10K
6
7
5
R11_2
R3_2
U1_2B
5K1
10K
4580M
1
U2_2A
4580M
C12_2
C11_2
33n(M)
33n(M)
R22_2 VR4_2
R24_2 R25_2
6K5 B50K
5K6 5K6
LO (80Hz)
-RVCC
R23_2
2K2
LOGIC
+RVCC
R33_2
R29_2
10K
100K
4148
PGND
100n
D2_2
+RVCC
U3_1B
6 PGND
7
4580M R32_2
5
82R
D3_2
4148
R31_2
C20_2 R30_2
100K
1uF 8K2
PGND PGND PGND
3
4 5
R8_2
5K1
C6_2
PS-22E85L-2
22P
SW2_2B
4
R7_2
5
1M
6 6
C3_2
5
47uF
2
1 R40_2
3
5K1
LEVEL
U1_2A
4580M
VR10_2A
10KD
+RVCC
R26_2
PS-22E85L-2
3K3
SW2_2A
1
2
3
LD2_2 MUTE
RED
R4_2
10K
R34_2
10K U4_2B
R39_2 TR1_2
393
5
27K
7
HR
6
C22_2 D4_2
1uF 4148
R38_2
TR3_2
R35_2
PGND
10K
7002
10K
8
LD4_2
3
LED-2P
1
2
R36_2
紅 綠
4
4K7
C21_2 R51_2
U4_2A
470P 1K
393
PGND
4 5
9
6 7
PM16MN1 (CH2)
C9_2 R41_2
PAN
4K7
22P SW5_2A
R9_2
PS-22E85L
5K1
R20_2 2
10K
SW5_2B
7
R10_2
PS-22E85L
5K1
5
W50K
C4_2
U2_2B VR9_2
47uF
4580M
SW3_2A
R12_2
PS-22E85L
5K1
2
4K7
R42_2
SW3_2B
R13_2
PS-22E85L
5K1
5
SW4_2A
R14_2
PS-22E85L
5K1
2
SW4_2B
R15_2
PGND
PS-22E85L
5K1
5
SW6_2C
R27_2
PS-42E85L
6K8
8
DIR-OUT2
SW6_2D
R28_2
SW6_2B
PS-42E85L
6K8
PS-42E85L
11
4
5
6
SW1_2A
AUX-POST
PS-22E85L
1
VR7_2
2
W50K
R16_2
3
SW1_2B 5K1
PS-22E85L
4
AUX-POST
5
6
VR8_2
W50K
R17_2
5K1
AUX1/2 PRE/POST
R18_2
AUX-PRE
5K1
VR5_2
W50K
R19_2
AUX-PRE
5K1
VR6_2
W50K
Titel
MAIN INPUT STAGE
PCB# PM16MN1.PCB
Size Model No:
A3
15-Jan-2005
Date:
File: CH2.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 2 of 4
Drawn By: KEVIN LIN.
8