Roland MC-505 Service Notes page 19

Feb, 1998
1 2 3 4 5 6
A
OUTPUT (MIX), MUTE CONTROL
A + 5
B
12 9
D Q
C113
11 0.1u
CLK
8
Q
A A
C IC35B IC35C
+ 5 TC74HC74F TC74HC74F
A
R312
D 100k
C122
0.022u
C118
R102 R103
0.047u
E 22k 22k IC41A
2
NORM_L
-
1
R100 C121 3
+
47k 0.1u
UPC4570G
A A A
F
G
R321
100k
C129
0.022u
C125
R124 R125
H
0.047u
22k 22k IC41B
NORM_R 6
-
7
C335 5
+
R320 0.1u
UPC4570G
47k
A A A
I
J
R89
27k
K
R351 R352
A
4.7k 8.2k
C350
A
100p
L
2
C119 IC55A
2
- R98 R99
10/16 1 3
3
M L + 4.7k 4.7k
UPC4570G
R104 C330
M
100k
A
A
C123
2200p
N
R111
27k
R353 R354
A
4.7k 8.2k
O
C354
A
100p
6
C126 IC55B
6
- R120 R121
10/16 7 5
P
5
M R
+ 4.7k 4.7k
UPC4570G
R126 C128
100k 1800p
A
A
Q
C135
2200p
+ 15
R
D5
DAN202K
1 2
Mute Conto
+ 15 C176
100/16
S
R212
D + 5
10k
1 Q13
R210
2SA1037KR
R213
470
10k
7 1
T
VCC NC
2
NC
R211 3
NC
10k 8 R214
NC
4 5 100k
GND DLY
IC34
- 15
U M51953BFP
C187 10/16
D D
7 8 9 10 11
R78 R79
10k 100k
C393
100p
CLIPPING signal
C114
2 100/16
-
1
R80
3
+
10k
IC45A
R84
A
R81
UPC4570G
100k
1k
MIXING left and right
A
A
A
R88
R302 R303 HIGH=+5V / LOW=-15V
10k
4.7k 47k
C394
C395 100p
A
100p
R91
10k
C325
2
-
2 100/16 1
-
1 3
+
3
R97
+ IC42A
IC53A 10k
UPC4570G
UPC4570G
Q3
R108
4.7k
R109 1
100k
2SC3326A
A A
R110
R327
R325 10k
4.7k
47k
C397
C398 100p
A
100p
R113
C326 10k
6
-
6 100/16 7
-
7 5
+
5
+ R119 IC42B
IC53B 10k
UPC4570G
UPC4570G
Q4 R130
4.7k
R131 1
100k
2SC3326A
A A
R145 C145 R96
NIU
NIU 10k
R90
C403
15k
100p
C402
NIU
2
-
1
NORM_L VOLRTN_L
R101
3
IC40A 10k +
- IC43A
1
A
UPC4570G
+
UPC4570G
1800p
VOLRTN_R
C153
R163 R118
NIU
NIU 10k
R112
C407
15k
100p
C405
NIU
6
-
7 NORM_R
R123
5
IC40B 10k +
-
IC43B
7
A
UPC4570G
+
UPC4570G
+5V when muting, otherwise -15V
D
C181 C182 C183
+ 15 + 15 + 15
0.1u 0.1u 0.1u
- IC40C - IC41C - IC42C
+ + +
UPC4570G UPC4570G UPC4570G
C192 C193 C194
A - 15 A - 15 A - 15
0.1u 0.1u 0.1u
12 13 14 15 16 17
+ 5 + 5 + 5
A A A
R74
IC35A
10k
TC74HC74F
IC45B
UPC4570G
6 Q1 2 5 1
- R76
D Q
7 1
2SC2412KR
5 3
+ 10k CLK
R357 6
Q
2.7k
A
R82 DEVIDER
+ 5
A
100k
A
DA9 - 15
R347 C117
DA204U
100k
0.1u
C328
R348 R94 R95
C351
0.1u
R92
330 22k 22k
3 2 10/16
-
10k
1
C120 3
+ IC44A
R316 0.22u
UPC4570G
100k R335
100k
A
R358
A A
100k
Q31
A
2SC3326A
Cutting off low
level signal
R349
100k
DA10
DA204U
C124
0.1u
C333 R350 R116
R117 C355
0.1u R114
330 22k 22k
3 6 10/16
- 10k
7
C127 5
+ IC44B
R122 0.22u
UPC4570G
100k R337
100k
A
R359
A A
100k
A
Q32
2SC3326A
R149 R146
NIU 2.2k
R147
C359 C148
1k
NIU 10/16
A (1/10W)
C320
2 1
-
10/16 1
3 R150
+
100k R153
IC48A
R304 A 10k
UPC4570G
100k
R169 R166
A
NIU 2.2k
R167
C361 C155
A
1k
NIU 10/16
(1/10W)
C321
6 1
-
10/16 7
5 R170
+
100k R171
IC48B
R305 10k
A
UPC4570G
100k
A
R188 R185
4.7k 22k
R186
C162 C164
47
100p 100/16
(1/2W)
2
A
-
1 1
3
+
IC49A
R189
100k R190
M5218AFP
2.2k
A
R207 R203
4.7k 22k
R204
C169 C171
47
A 100p 100/16
(1/2W)
6
-
7 1
5
+
IC49B
R208
100k R209
M5218AFP
2.2k
A
C184
+ 15
0.1u
- IC43C
+
UPC4570G
C195
A - 15
0.1u
18 19 20 21 22 23
+ 5
A
Q30
R308
DA14
2SA1037KR
R307
330
DA204U DA15
10k
1
OCT
DA204U
Q29 C324
DTA114EK 0.1u 3 3
R310 R309
D 22k 22k
DA16
DA204U
- 15
3
-15V when C327
100/16
OCTAVE is ON,
R355
100k
else +5V
C349
100/16
R306
1k
A
C426
R313 R366
100/16
2.2k 12k
LBSND_L
C427
100p
1
Q35
R318 R371
2
2SC3326A
- 4.7k
4.7k 1
3
+
A
R105
IC46A
1
10k
UPC4570G
A
R387
C428 10k
10/16
LBRTN_L
A
R369
100k NORM_L
A
C429
R322 R370
100/16
2.2k 12k
LBSND_R
C430
100p
1 MUTE
6 Q36
- R372
R326
7
2SC3326A
4.7k
4.7k 5
+
R127
IC46B
A
10k
UPC4570G
1
A
C431
R388
10/16
10k
LBRTN_R
A
R373
100k
A NORM_R
R148
L9
680
N2012Z601
(1/10W)
2
4
Mix Out(L/Mono)
C400 1
Q6 100p
JK2
2SC3326A
HLJ7101-01-3010
F
A F
R168
JK4
680 HLJ7101-01-3010
(1/10W)
2
4
Mix Out(R
L10
C404 1
Q8 100p N2012Z601
2SC3326A
F
A F
R187
L13 JK6
47
HLJ7001-01-3010
N2012Z601
(1/2W)
2
3
Phones
C406 1
Q10 100p
2SC3326A
F
A F
C432
+ 15
0.1u
R205
47
(1/2W)
- IC46C
L14 +
UPC4570G
C409
Q12 100p N2012Z601
2SC3326A
C433
F A - 15
0.1u
A
MUTE
MC-505
24 25 26 27 28
CN1
LBSND_L 10
10
LBRTN_L 9
LowBoost
9
LBSND_R 8
8
LBRTN_R 7
Volume
7
6
6
5
5 4
4
VOLSND_L
4
3
VOLRTN_L Master
3
2
VOLSND_R
2
VOLRTN_R 1 Volume
1
A
52147-1010
R106
15k
C396
R367
100p
2.2k
C352
2 100/16
-
1
R107
3
18k +
IC47A
UPC4570G
A
R128
15k
C399
R368
100p
2.2k
C356
6 100/16
-
7
R129
5
18k +
IC47B
UPC4570G
A
C130 C131
+ 15 + 15
0.1u 0.1u
- -
IC44C IC45C
+ +
UPC4570G UPC4570G
C136 C137
- 15 - 15
A A
0.1u 0.1u
C133
+ 15 C134 + 15
0.1u
0.1u
- IC47C - IC48C
+ +
UPC4570G UPC4570G
C139 C140
A - 15 A - 15
0.1u 0.1u
C338
C408 + 15
0.1u
+ 15
10/16
C173 - IC53C
0.1u
+
UPC4570G
C339
A - 15
-
IC49C
0.1u
+ M5218AFP
C340 + 15
C175
0.1u
0.1u
- IC55C
C410
+
UPC4570G
10/16
C341
A - 15 A - 15
0.1u
19