Roland MC-505 Service Notes page 22

MC-505
1 2 3 4 5 6
A
B
PANEL I/O
C
C231 C233
100p 100p
C230 C232
D
100p 100p 100p
LCD[0..7]
LCD[0..7]
100x4
RA20
RA21 100x4
E
LCD7 1 8
LCD6 2 7
3 6
LCD5
LCD4 4 5
LCD3 1 8
LCD2 2 7
F 3 6
LCD1
LCD0 4 5
1 8
LE
2 7
RXW
3 6
R S
4 5
RA22 100x4
G
C243 C245
100p 100p
C242 C244
H
100p 100p
D
I
PD[0..7] PD[0..7]
PD[0..7]
PD7
1 8
PD6
PD5 2 7
PD4 3 6
J
4 5
PD3
PD2 1 8
PD1 2 7
3 6
PD0
4 5
LLCK
K
RA24
100x4
RA25
100x4
C254 C256
100p 100p
L C253 C255
100p 100p
M
PB[0..7]
N
PB[0..7]
P B 7 4
P B 6 3
P B 5 2
P B 4 1
O P B 3 4
3
P B 2
P B 1 2
P B 0 1
P
IOEN
Q
+ 5
D
R
AMUX1 2
B
AMUX0 1
A
3
S
G
T
D
U
22
7 8 9 10 11
LCD Contlast Voltage
m a x = 0 . 7 V (Bright)
min.=-0.2V(Dark)
C235
100p
C234
Molex FFC/FPC Connector
R262 R265
(1.0mm pitch)
5 2 8 0 6 - 1 4 1 0 10k
+ 5
D
D
L C D P W M
( 0 0 9 0 4 6 1 2 )
L29
C425
0R0 CN4
0.1u
1
1
2
D
2
3
3
4
4
5
L C D
5
6 R3
6
7
M o d u l e
7
8
DA8
8
9
9
+ 5 DA204U
10 D
10
11 2 1
11
12
12
13
C246 D
13
14
100p
14
52806-1410 LCV
C247
R258
C236
0.1u L30
0.1u 1k
0R0
D D D
D
+ 5
IC31B
RA23 6
-
10kx8
CN6
5
+
1
1
2
2
3
R274
3
4
4 1 M
5
D
5
6
C252
D
6
7
0.01u
7
8
8
9
9
10
10
C261
0.1u
52147-1010
Molex Wire Trap
C258 C260
100p 100p D
C257 C259 C241
100p 100p 100p
D
C266
0.1u
C271 C273
100p 100p
C272 C274
100p 100p
D
RA28
100x4
5
6
C275 100p
7
8
5 C276 100p
6
C277 100p
7
D
8
C278 100p
D
RA29
100x4
CN8
12
12
11
11
10
K e y P a d
10
9
9
8
8
7
7
6
6
5
5
4
4
Y0 3
3
Y1 2
2
C286
Y2 1
1
0.1u
52147-1210
D
5
Y2
6
Molex Wire Trap
Y1
7
Y0
IC28
TC3W01F
12 13 14 15 16 17
+ 15
R2
R263
12k
2.2k
C424
0.1u
1k
2
-
1
3
+
IC31A
UPC4570G
D
TH1
10k NTH5G1M33B103J
( T h e r m istor)
R264
6.8k
- 15
R272
7
AN2
100
UPC4570G
D
C379
0.01u
+ 15
-
IC31C
UPC4570G
+
- 15
C280
+ 5
D 220/6.3
+ 15
D
C281
470/16
1
1
2
P o w e r
2
3
3
4
A S u p p l y
4
5
5
C283 6
6
22/16 7
7
- 15
D
CN9
B7B-XH-A
18 19 20 21 22 23
+ 5 + 5
D D
Q26 Q27
DTA114EK DTA114EK
1 1
BEAT_G BEAT_R
R256 R257
+ 5
D (1/10W) (1/10W)
220 220
CN5
1
1 P U L S E
2
2
3
3
4
4
5
5
6
6
7
7
8
8
C237 C238 C239
9
9
10
100p 100p 100p
10
11
11
12 C240
D D
12
13 220/6.3
13
52147-1310 IC30A
2
-
1
D
3
+
C249 UPC4570G
R270
0.01u
1 M IC30B
6
D
-
7
D
5
+
C251
UPC4570G
R273
0.01u
1 M
D
D
8 1 LS3
7 2 LS2
6 3
LS1
5 4 LS0
RA26
LS[0..3]
100x4
CN7
C262 C263 C264 C265 SS[0..2]
1
D
1
2
100p 100p 100p 100p
2 RA27
3
3
4 100x4
4
5 4 5
S S 2
5
6 3 6 S S 1
6
7 2 7 S S 0
7
8 1 8
8
9
9
10
10
11
11
+ 5
D
52147-1110
R275
D 15k
C267 C268 C269 C270
100p 100p 100p 100p
R276 R277
1k 1k
+ 5
D
C279
0.01u
R278
R279
D
15k
15k
R280 R281
1k 1k
E N C A
E N C B
R282 R283
1k 1k
C284 C285
(Value Dial)
0.01u 0.01u
D
Feb, 1998
24 25 26 27 28
R259 100
R260
100
R261 100
AMUX0
AMUX1
AMUX2
AMUX[0..2]
AMUX[0..2]
D
C248
+ 15
0.1u
R269
AN1
100
C377
-
IC30C
0.01u
UPC4570G
+
D
C250
R271
AN0
0.1u
- 15
D
100
D
C378
0.01u
LS[0..3]
SS[0..2]
S S E N
D + 5
IC29A
2 5
D Q TAPINT
1
CLK
3
Q
TC7W74F
+ 5
D
C282
+ 5
D 0.1u
IC29B
D
TC7W74F
D