Roland SPD-20 Service Notes page 6

SPD-20
1 2 3 4 5 6
A
JK8
TCS5350-01-415 1
MIDI IN 3 1
+ 5
D
5 4
2
B
L15 R97
BLM21A601S
100
1
3
C91 R107
L16
C
0.1 BLM21A601S 120
D1
DSD010
D
A
JK7
TCS5350-01-415 1 5
D
IC14B
+ 5
D
TC7W04F
MIDI OUT 3 1 Q22
5 4 DTA114EK
2
1
L13 R80
BLM21A601S 220
E
IC14A IC14C
7 1 2
L14 R87
TC7W04F TC7W04F
A A
BLM21A601S 220
F
+ 5 R203
D
10
1 1 1
Q21 Q19 Q20
DTA114EK DTA114EK DTA114EK
C129
D
G
470/25
RA7
220x4
RA8
220x4
H CN2
8 1
30 7 2 1 1 1
30
29 6 3 Q16 Q18 Q15
29
28 5 4
DTA114EK DTA114EK DTA114EK
28
27 8 1
27
26 7 2
26
25 6 3
I
25
24 5 4
24
23
23
22
22
21
21
20
20
19
19
18
J
18
17
17
16
16
15
D
15
14
14
13
13
12
12
11
K
11
10
10
9
9
8
10k
8
7
10k
7
D + 5
6
10k
6
5
10k
5
4
L
10k
4
3
10k
3
D + 5
2
2
1
1
1
SLEM30R-2
+ 5
D
Q14
R68
M DTA114EK
220
1
Q13
R66
DTA114EK
220
N
1
Q12
R64
DTA114EK
220
O
1
Q11
R62
DTA114EK
220
P
1
Q10
R61
DTA114EK
220
Q
1
R59
Q9
220
DTA114EK
R
+ 5
D
S DA10
+ 5
R82 D
DCC010
C105 C119 2
47k
1000p 1000p
L17
BLM21A601S
5
JK9
4
D + 5
2
T
3
FOOT SW
DA7
+ 5
D
7
DCC010
8 2
R78
1 47k
YKB21-5006
A
U L18
A
BLM21A601S
6
7 8 9 10 11
+ 5
D
C75
0.1
R88
2.2k
D
5 MIDI IN
IC17
PC410
C73 + 5
D
0.1
D
3
D IC14D
TC7W04F
C68
D + 5 D + 5
D
100/6.3
R85
4.7k
+ 5 C69
D
D
0.1
6 MIDI OUT
IC12
R71
10k
+ 5
D
111
110
109
D
112
R79
96
100
95
92
94
93
R84
91
100
80
HH_INIT
1 79
Q17 78
77
DTA114EK
76
75
74
73
72
HH/TRG4_SW
71
SCAN_SW
70
69
68
67
66
65
63
62
61
60
59
58
57
56
54
53
52
51
50
DCF010
DA8
D 2 1
86
AN3
85
AN2
84
AN1
83
AN0
2 1
DA4
+ 5
A
DCF010
87
D
C59
C72
0.1 100/6.3
82
A
98
C66
D
10p
99
R76
C65
1M X2
D
10p
MA-406@
20.0MHz
1
+ 5
D
R57 10k
HD6415108F
XRESET
R56 10k
R53 10k
D
R52 10k
1
C74
D
100p
R83
1k D
1
D
R75
C67
1k D
100p
12 13 14 15 16 17
D
2M EPROM : R45
4M MASK :JUMPER
R45
10k
+ 5
D
RA3 100x4
RA2 100x4
RA1 100x4
RA4 100x4 D
45 RA5 100x4 JUMPER
44 R50 NIU
100 IC10
43
A21
42 31 21 D7
A18 D7
41 1 8 A20 A17 30 20 D6
A17 D6
40 2 7 2 19
A19 A16 D5
A16 D5
39 3 6 A17 A15 3 18 D4
A15 D4
38 4 5 A16 A14 29 17 D3
A14 D3
28 15
A13 D2
A13 D2
36 1 8 A15 A12 4 14 D1
A12 D1
35 2 7 A14 A11 25 13 D0
A11 D0
34 3 6 23
A13 A10
A10
33 4 5 26
A12 A9
A9
32 1 8 A11 A8 27
A8
31 2 7 A10 A7 5
A7
30 3 6 6 R47
A9 A6
A6
10k
29 4 5 A8 A5 7
A5
28 1 8 A7 A4 8 1
A4 VPP
+ 5
27 2 7 9 D
A6 A3
A3
26 3 6 A5 A2 10
A2
25 4 5 A4 A1 11 32
A1 VCC
24 1 8 12
A3 A0
A0 C43
23 2 7
A2
D + 5
22 3 6 A1 A19 22
0.1
CE
21 4 5 A0 24 16
OE VSS
R51
2.2k
M27C2001-10F1
19 D7
D
C42
18
D6
100/6.3
17 D5 A[0..21]
16 D4
15
D3
14
D2
13 D1
12 D0
11 D[0..7]
RIM4
10
RIM3
9
RIM2
8
RIM1
7
6
IC8
5
SCAN_B
4 A16 2 21 D7 D7
SCAN_A A16 I/O8
A15 31 20 D6 D6
A15 I/O7
3 19
A14 D5 D5
A14 I/O6
105 XWR A13 28 18 D4 D4
A13 I/O5
106 A12 4 17 D3 D3
A12 I/O4
104 25 15
XRD A11 D2 D2
A11 I/O3
103 A10 23 14 D1 D1
A10 I/O2
47 XWAIT A9 26 13 D0 D0
A9 I/O1
49 27
A8
A8
48 A7 5
A7
107 A6 6
A6
A5 7
A5
8
A4
A4
90 A3 9
A3
89 A2 10
A2
2 11 1 B A T
A1
A1 NC
A0 12
A0
BA T
32
D
VDD
101 30
CS2
102 22 C46
CS1
29 0.1
WE
24 16
OE VSS
TC551001B(C)FL-70 L
C47 D
100/6.3
C49
B A T
0.1
+ 5
D
D
A20 1
4 L3
2 BLM32A601S
XRESET
IC9
TC7S00F
R49
X1
10k
D D 8
VDD
C50 + 5
D
0.1 C41
0.1
4
GND OUT
D D
2 4
A21
SG-8002
H8/510 D
IC11
23.2MHz
D + 5
TC7S04F
+ 5 C88
D
D
0.1
R102
4.7k
2 4
IC20
+ 5
D
TC7S04F
7 1
VCC NC
2
D
NC
C97 3
NC
0.1
8
NC
4 5
GND DLY
C98
D
IC22 1/50
M51954BFP
18 19 20 21 22 23
+ 5 C34
D
100/6.3
C35
0.1
+ 5
D
WA[0..22]
IC6
R40
10k
114 134 WA19
113 135
WA18
112 137 WA17
136 WA16
138
D WA15
66 139 WA14
D + 5
67 141 WA13
R38
69 140
WA12
68 4
WA11
10k
70 7 WA10
71 2 WA9
74 144
WA8
R39 73 143 WA7
10k 76 1 WA6
80 3
WA5
5 WA4
6 WA3
D
75 8
A5 WA2
77 9
A4 WA1 WA20
A3 79 11 WA0
A2 81
84
A1
A0 86 10 WD7
12 WD6
14
WD5
D7 85 16 WD4
D6 87 20 WD3
89 17
D5 WD2
93 15
D4 WD1
D3 95 13 WD0
D + 5
D2 94
92
D1
D0 88 133
132
R28 10k
131
R24 10k
99 130 R23 10k
XRESET
100 129 XWCS3
78 128
XWCS2
72 125
XWCS1
97 124 XWCS0 XWCS3
102 45 EA14
107 42 EA13
115 43
EA12
111 36 EA11
110 33 EA10
109 38
EA9
108 40
EA8
RA6
9 101 41 EA7
8 39 EA6
7 37
EA5
6 116 35 EA4
5 98 34 EA3
4 82 32
EA2
+ 5
D
3 83 30 EA1
2 1 118 28 EA0
117
RCE9A@JA
52
10kx8
96 29 ED7
27 ED6
25
ED5
53 23 ED4 D
56 21 ED3
57 22
ED2
24 ED1
65 26 ED0
64
63
62 44 XEWR
61 31 XECS
60
59
58 119 R37 1k
SIDATA
121
BCLK
103 120 R36 1k
105 122
LRCK
123 R35 1k
R46 46
10k 47 106
48
49
50
D
51
1
OE
L4
BLM21A601S TC6116AF
GP_4
5
D
D
XRESET
D
Apr, 1998
24 25 26 27 28
WA0
IC1
WA22 1 31
A21 */D15
44 29
WA21
A20 D14
WA20 43 27
A19 D13
WA19 2 25
A18 D12
64M MASK ROM
3 22
WA18
A17 D11
34 20 (SPD-20 WAVE)
WA17
A16 D10
WA16 35 18
A15 D9
WA15 36 16
A14 D8
37 30
WA14 WD7
A13 D7
WA13 38 28 WD6
A12 D6
WA12 39 26 WD5
A11 D5
40 24
WA11 WD4
A10 D4
WA10 41 21 WD3
A9 D3
WA9 42 19 WD2
A8 D2
4 17
WA8 WD1
A7 D1
5 15
WA7 WD0
A6 D0
WA6 6
A5
WA5 7
A4 + 5
8 D
WA4
A3
WA3 9
A2
WA2 10 23
A1 VCC
11
WA1
A0
12 C6
C8
CE
14 13 100/6.3
0.1
OE VSS
33 32
BYTE VSS
D LHMN0PW2
D
WD[0..7]
XWCS
XWCS[0..3]
C18
+ 5
D
0.1
+ 5
D
D
R19 10k
4 6
IC3 XWCS0
7 A2
1 19 ED7 XWCS1 3 7 WA22
A14 I/O7 6 A1
26 18 ED6 XWCS2 2 9 WA21
A13 I/O6 5 A0
2 17 1
ED5 XWCS3
A12 I/O5 4
23 16 ED4 13
A11 I/O4 3
21 15 ED3 12
A10 I/O3 2
24 13 11
ED2
A9 I/O2 + 5 1
25 12 D 10
ED1
A8 I/O1 0
3 11 ED0 15
A7 I/O0 EO
4 5 14
A6 EI GS
5
A5
6 D
A4
7
A3
+ 5
8 D
D
A2
9
IC2
A1
10 28
TC74HC148AP
A0 VCC
20 C30 C22
CE
0.1
27 100/6.3
WE
22 14
OE VSS
TC55257DFL-70L
D
ED[0..7]