0201000986-619050
APPROVED:
ECO NO:
LTR
A
B
C
D
6
5
4
3
2
1
DATE:
D
C
B
A
REVISION RECORD
SCALE:
SHEET: OF
DRAWING NO:
TITLE:
COMPANY:
RELEASED:
DATED:
DATED:
QUALITY CONTROL:
CHECKED:
DATED:
DATED:
DRAWN:
CODE:
SIZE:
REV:
9
2
<Scale>
011
A2
<Code>
VMA - Front Panel (2-CH)
<Release Date>
<QC Date>
<Checked Date>
<Drawn Date>
<Released By>
<QC By>
<Checked By>
<Drawn By>
COMPONENTS ON THIS SHEET ARE PLACED ON CHANNEL VOLUME SECTION
+
-
2
3
1
U4-A
TL074
C21
10u
16V
R33
2.74k
1
2
3
VR11
10K
C22
1u
16V
R35
221k
C23
N.I.
16V
R
36
N
.I.
+
-
6
5
7
U4-B
TL074
C24
10u
16V
R37
2.74k
1
2
3
VR12
10K
C25
1u
16V
R39
221k
C26
N.I.
16V
R
40
N
.I.
+
-
9
10
8
U4-C
TL074
C30
10u
16V
R41
2.74k
1
2
3
VR13
10K
C31
1u
16V
R43
221k
C32
N.I.
16V
R
44
N
.I.
+
-
13
12
14
U4-D
TL074
C33
10u
16V
R45
2.74k
1
2
3
VR14
10K
C34
1u
16V
R47
221k
C35
N.I.
16V
R
48
N
.I.
11
N
4
P
U4-E
TL074
C83
0.1u
C84
0.1u
S
G
D
Q17
MMBFJ108
C17
0.1u
R26
N.I.
S
G
D
Q26
MMBFJ108
S
G
D
Q27
MMBFJ108
S
G
D
Q28
MMBFJ108
Q25
MMBT3904
R
11
4
15
k
R140
4.7k
R143 5.6k
Q41
MMBT3906
R144
49.9k
C216
0.1u
Q47
MMBT3904
R
19
7
15
k
R198 49.9k
S
G
D
Q48 MMBFJ108
C217
0.1u
S
G
D
Q49 MMBFJ108
C218
0.1u
C219
0R
C220
0R
C221
0R
C231
0R
R5
1M
C18
0.1u
R8
N.I.
R25
1M
C27
0.1u
R27
N.I.
R28
1M
C28
0.1u
R29
N.I.
R30
1M
R271
1M
R272
1M
R68
0R
R293
0R
R294
0R
R295
0R
S
G
D
Q7 MMBFJ108
S
G
D
Q8 MMBFJ108
C19
0R
C36
0R
C40
0R
C43
0R
R31
1M
R32
1M
IN04
[9]
IN05
[9]
IN06
[9]
MS02
[9]
MIX_CH2_IN06
[4]
MIX_CH2_MS02
[4]
+15V
-15V
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
DIP3_6
[9]
AGND
MIX_CH1_IN04
[4]
MIX_CH1_IN05
[4]
MIX_CH1_IN06
[4]
MIX_CH1_MS02
[4]
MIX_CH2_IN04
[4]
+15V
AGND
-15V
+3.3VA
CH2_CTRL_1
[7]
+15V
-15V
MIX_CH2_IN0205-A
[4]
AGND
AGND
MIX_CH2_IN05-PRE
[2]
MIX_CH2_IN02
[1,2]
MIX_CH2_IN05-PRE
[2]
+15V
DIP3_7
[9]
AGND
+15V
DIP3_8
[9]
AGND
+15V
DIP3_9
[9]
AGND
+15V
MIX_CH2_IN0205
[4]
MIX_CH2_IN02
[1,2]
MIX_CH2_IN05-PRE
[2]
VMA 160/1120/1240/260/2120 Service Manual
Version A - 09/20
42
Table of Contents
