Circuit Diagram(Analog) - Roland Dr. Sample SP-303 Service Notes

Mar.2001

CIRCUIT DIAGRAM(ANALOG)

fig.analog
JK7
LGR4609-7000
2
4
3
1
MIC IN
LINE IN
JK8A
YKC21-3049
L
R
DA
C205
10/16
C187
10/16
30
L28
C152
N2012Z601T02
0.01
L29
R125
N2012Z601T02
1K
R128
150
L8
N2012Z601T02
C155
0.1
A
L51
N2012Z601T02
12
L52
11
N2012Z601T02
22
21
L53
N2012Z601T02
C173
0.1
A
R170
33k
C203
100p
R175 R176
12k 15k
2
-
3
+
C207
IC4A
UPC4570G
0.0012
+ +
fc=20.xxxkHz
Q=0.99
G=8.57
R150
33k
C184
100p
R155 R156
12k
15k
6
-
7
5
+
C190
IC4B
UPC4570G
0.0012
+ +
VOLUME
TO SW BOARD
CN15
R123
MIC VOLUME
10k
C154 R126 VR6A
22/16 250kRD
1k
3 1
C308
R129 0.22/50
22k
DA1 R124
MA147-(TX)
A
C246
3 6
5
C171 R143
22/16 47k
R139 47k
C248 10p
R145
6
-
3 7
47K
5
+
IC2B
UPC4570G
A
+
DA3
MA147-(TX)
C159 R135
22/16 47k
R131 47k
C247 10p
2
-
3 1
3
+
R137
IC2A
UPC4570G
47K
+
DA2
MA147-(TX)
A
R162
10k
C194
10/16
C204
22/16
A
1
C199
1/50
R148
10k
C189
C180
22/16
10/16
A
C185
1/50
A
CN12
RIBON CABLE 5P
C224
1/50
1M
10p
-
7
+
IC1B
UPC4570G
4.5v(M)
C242
22/16
R132
10K
C243
22/16
R136
10k
R182
10K R140
C244
22/16
R144
10k
R163 22k
IC5A
C197
M5216FP
100/16
2
-
1
3
+
R177
R172 R248
100
C196
100k 1k
+
150p
A
R149 22k
IC5B
C182
M5216FP
100/16
6
-
7
5
+
R161
R157 R249
100
100k 1k
+
C181
A
150p
SP-303
+
+ 5
A
C2
0.1
R207
4.7k
A
R208 C225
4.7k 10/16
C160
100/6.3
A
R133
3.9k
2
-
1
3
+
IC3A
C167
BA15218F
100/6.3
C
3.9k
6
-
7
5
+ C-VDD
IC3B
BA15218F
C175
0.1
R166
1k
1
A A
Q17
DTC314TK
R151
1k
1
A A
Q15
DTC314TK