Akai ADA2, Service Manual

Page: 32 / 95

1 1
2 2
3 3
4 4
5 5
6 6
D
D
C
C
B
B
A
A
3
200
Scenic
View
Dr.
Cumberland,
RI
02864
4
2018/9/12
Sheet:
of
POTS.SchDoc ADA2
TP-PC17A012-A.PrjPcb
Originally
Drawn
By:
Project: Sheet: Variant:
[No
Variations]
Last
Modified
By:
Last
Modified:
Copyright
2018,
inMusic
Brands
All
Rights
Reserved
KRH KRH
Rev
MP
4 2
1
MNT
3
360
2.5KB
VR1
360
PO
T
#1
+3
.3VPOTP
P1
PH
A
P1
PH
B
P1
T
C
H
360
PO
T
#1
4 2
1
MNT
3
360
2.5KB VR2
360
PO
T
#2
P2
PH
A
P2
PH
B
P2
T
C
H
360
PO
T
#2
4 2
1
MNT
3
360
2.5KB
VR3
360
PO
T
#3
P3
PH
A
P3
PH
B
P3
T
C
H
360
PO
T
#3
4 2
1
MNT
3
360
2.5KB
VR4
360
PO
T
#4
P4
PH
A
P4
PH
B
P4
T
C
H
360
PO
T
#4
4 2
1
MNT
3
360
2.5KB
VR5
360
PO
T
#5
P5
PH
A
P5
PH
B
P5
T
C
H
360
PO
T
#5
4 2
1
MNT
3
360
2.5KB VR6
360
PO
T
#6
P6
PH
A
P6
PH
B
P6
T
C
H
360
PO
T
#6
4 2
1
MNT
3
360
2.5KB VR7
360
PO
T
#7
P7
PH
A
P7
PH
B
P7
T
C
H
360
PO
T
#7
4 2
1
MNT
3
360
2.5KB VR8
360
PO
T
#8
P8
PH
A
P8
PH
B
P8
T
C
H
360
PO
T
#8
POTGNDP
Z
1
Y7
2
Y6
3
Y5
4
Y4
5
Y3
6
Y2
7
Y1
8
Y0
9
S0
10
S1
11
GND
12
S3
13
S2
14
E
15
Y15
16
Y14
17
Y13
18
Y12
19
Y11
20
Y10
21
Y9
22
Y8
23
VCC
24
Z
Y
7
Y
6
Y
5
Y4 Y
3
Y
2
Y
1
Y
0
S0 S1
G
ND
S3 S2 E Y1
5
Y14 Y1
3
Y1
2
Y1
1
Y1
0
Y
9
Y
8
V
CC
U10
HC4067
PO
T
SEL
3
P
PO
T
SEL
2
P
PO
T
SEL
1
P
PO
T
SEL
0
P
P2
PH
B
P2
PH
A
P1
PH
B
P1
PH
A
P4
PH
B
P4
PH
A
P3
PH
B
P3
PH
A
P6
PH
B
P6
PH
A
P5
PH
B
P5
PH
A
P8
PH
B
P8
PH
A
P7
PH
B
P7
PH
A
PO
T
S
P
+3
.3VPOTP
Q7
2SK1828
R298 10.0 K
1
3
2
D34
MMBD4148SE
R297 301K
D38 MM BD 414 8
T
CHS0
P
R317 10.0K
1
3
2
D42
MMBD4148SE
R325 301K
D48 MMBD4148
T
CHS1
P
+3
.3
V
P
T
CHS2
P
T
CHS3
P
Q8
2SK1828
R299 10.0 K
4
5
2
U11B
LM339
6
7
1
U11A
LM339
R319 10.0K
11
10
13
U11D
LM339
8
9
14
U11C
LM339
1
3
2
D35
MMBD4148SE
1
3
2
D43
MMBD4148SE
R318 10.0K R292 12.1 K
R300 301K
D39 MM BD 414 8
R320 301K
D46 MM BD414 8
T
C
HR0P
R302 10.0 K
1
3
2
D36
MMBD4148SE
R301 301K
D40 MM BD 414 8
T
CHS0
P
R321 10.0K
1
3
2
D44
MMBD4148SE
R326 301K
D49 MMBD4148
T
CHS1
P
TC
H
S
2
P
TC
H
S
3
P
R303 10.0 K
4
5
2
U12B
LM339
6
7
1
U12A
LM339
R323 10.0K
11
10
13
U12D
LM339
8
9
14
U12C
LM339
1
3
2
D37
MMBD4148SE
1
3
2
D45
MMBD4148SE
R322 10.0K R294 12.1 K
R304 301K
D41 MM BD 414 8
R324 301K
D47 MM BD414 8
T
C
HR1P
DGNDP
DGNDP
+3
.3
V
P
-
12
+
3
U1
1E
LM33
9
+3
.3
V
P
DGNDP
-
12
+
3
U1
2E
LM33
9
+3
.3
V
P
DGNDP
Q11
2SK1828
Q12
2SK1828
Q9
2SK1828
Q10
2SK1828
Q13
2SK1828
Q14
2SK1828
R293 10.0 K
R291 10.0 K
P1
T
C
H
R285 0.0
P2
T
C
H
R309 0.0
P4
T
C
H
R310 0.0
P6
T
C
H
R311 0.0
P3
T
C
H
P8
T
C
H
P7
T
C
H
R312 0.0 R288 0.0
P5
T
C
H
R287 0.0
R286 0.0
POTGNDP
0.1uF #NAME?
C56
0.1uF
#NAME?
C57 0.1uF
#NAME ?
C62
0.1uF
#NAME?
C59 0.1uF
#NAME?
C64
0.1uF
#NAME?
C60 0.1uF
#NAME?
C65
0.1uF
#NAME?
C63 0.1uF
#NAME?
C58
0.1uF
#NAME?
C61 0.1uF
#NAME?
C66
#NA ME? C32
#NA ME? C33
#NA ME? C34
#NA ME? C35
#NA ME? C36
#NA ME? C37
#NA ME? C38
#NA ME? C39
#NA ME? C40
#NA ME? C41
#NA ME? C42
#NA ME? C43
#NA ME? C44
#NA ME? C45
#NA ME? C46
#NA ME? C47
#NA ME? C48
#NA ME? C49
#NA ME? C50
#NA ME? C51
#NA ME? C52
#NA ME? C53
#NA ME? C54
#NA ME? C55
TO POT S PC B
+3
.3
V
P
POTGNDP
DGNDP
+3
.3VPOTP
T
CHS0
P
T
CHS1
P
T
CHS2
P
T
CHS3
P
T
CHR0P
T
CHR1P
PO
T
SEL
0
P
PO
T
SEL
1
P
PO
T
SEL
2
P
PO
T
SEL
3
P
PO
T
S
P
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
ZIF-BOTT OM-CON TACT 0.5mm
J29
TO POT S PC B
POTS
PC
B