Alto MS8MA Service Manual page 12

1 2
MIC1
CN-BAL-MALE
D FL5R
1
3
2 L1
4
FL5R
HIGH INPUT
+4dB
L2
MIC2
XLR
X2 X1
1
2
3
4
5
6
C
SW1A
SW1B
1 4
2 5
3 6
P
SW PS-22E85L
SW PS-22E85L
R318
68R 1W
CN1
1
CN2 2
R107
+8V 1 3
3k
2
DL2
power
B
R319
68R 1W
Q100
2SA1015
R102
D100 1N4148 2.2K 1/4W
+8V
R103
100K
R101
D101 1N4148 22K
C100
10uF/50V
ZD1
NC
R100
C102
4.7K 1/4W
220uF/25V
A
C101
POWER ON/OFF MUTE
2.2uF/50V
1 2
3
C3
C1 47u/25V
R1 2.2K
22P
R4 R6
15K
0.22UF 7.5K
C2
R2
-8V
U1A
15K
0.22UF
2
1
3
+8V
1 3
Vin +8V
D304 U304
1N4002
C319
LM7808CT
C315 0.1u cer
0.1u
C317
220UF/25V
U305
C316 C320
LM7908CT
0.1u
0.1u cer
C318
220UF/25V
D305
2 3
Vin -8V
1N4002
LOW-OUT
D102
R105
Q101
1
B
2SC2878
200R
1N4148
R104
100K
HIGH-OUT
D103
R106
1 Q102
B
-8V 2SC2878
200R
1N4148
3
4 5
VR1
B10K
3 1
R7
C7
0R
C4
22P
6 _ U1B 47u/25V
10K
7 2
5
+
R8
3
C9
INPUT-ENCORDER
+8V 150mA MAX
+8V
D306
1N5817
C331
47UF/25V
D307
1N5817
C332
47UF/25V -8V 150mA MAX
-8V
10
4 5
6 7
C5
47P
22P
C12
R9 10K
C11 47P
R12 R13
-8V C13
6.8K 3.9K
47u/25V -8V
10K
U2A
U3A
1 2
R15
1 6 _
3
4.7K
5
+
+8V
+8V
DL1
ZD2
R24
K A
6K8
CLIP
TR1 0R
B C1815
D3
LED-RES
NOCTH+LOW BOOST+LOW PASS HF TRIM+HIGH PASS
NOCTH+LOW BOOST+LOW PASS HF TRIM+HIGH PASS
6 _ U2B
7
5
+
Titel MS10MA/MS12MA-PRE
Size Model NO:
A3
Date
File
MS12MA.sch
6 7
8
MS10MA/MS12MA-PRE(1/4)
D
D1
A K
A K
1N4148
R10
U3B
D2 6K8
7
R25
1N4148
+8V
C
ENCODER
ENCODER.SCH
B
+8V
-8V
A
Revision
MS10MA/MS12MA VER061212
5-Feb-2007 Sheet of
1 4
Drawn By XiaoPingHuang
8