Roland VS-840 Service Notes page 19

Mar, 1998
1 2 3 4 5 6
A
B
C
D
E
F
G
H
I
J
IL-FPC-25ST-N
K
L
M
5
N
2
O
P
Q
R
S
T
U
7 8 9 10 11 12
CN1
1 D8
1
2 D9
2
3 D10
3
4 D11
4
5 D12
5
6 D13
6
7 D14
7
8 D15
8
9 A0
9
10 A1
10
11 A2
11
12 A3
12
13 HWR
13
14 RD
14
15 IRQ2
15
16 SCSIDRQ
16
17 DACKO
17
18 XRST
18
19 CS6
19
20
20
21
21
22
22
23
23
24
L3
24
25
25
R2 N2012Z601
10K
2
C9
0.1
1
C1
R5
100/6.3
100
X1
MA406-25.000MHZ
1 4
IC3B
3
TC7WU04F
IC3C
6
TC7WU04F
IC3A
7 1
TC7WU04F
IC3D
TC7WU04F
47/6.3
C8
4 0.1
R3
C10
1M
C7
10P
8 10P
13 14 15 16 17
IC2
55 41
PAD0 MODE
56 54
PAD1 TESTIN
57
PAD2
58 5
PAD3 VDD_1 C2
60 17
PAD4 VDD_2 0.1
61 40
PAD5 VDD_3
62 54
PAD6 VDD_4
63
PAD7
1
VSS_1
6 9
DB0 VSS_2
7 13
DB1 VSS_3
8 21
DB2 VSS_4
10 26
DB3 VSS_5
11 31
DB4 VSS_6
12 36
DB5 VSS_7
14 43
DB6 VSS_8
15 51
DB7 VSS_9
16 59
DBP VSS_10
R1 10K
49 18 SD0
A0 SD0
50 19 SD1
A1 SD1
52 20 SD2
A2 SD2
53 22 SD3
A3 SD3
23 SD4
SD4
46 24 SD5
RD SD5
45 25 SD6
WR SD6
4 27 SD7
DBWR SD7
28 SDP
SDP
42
INT
33 SCRST
RST
2 30 BSY
DREQ BSY
3 35 SEL
DACK SEL
39 I/O
I/O
47 37 C/D
CS C/D
34 MSG
MSG
44 38 REQ
RESET REQ
32 ACK
ACK
48 29 ATN
CLK ATN
NCR53CF92
1
D1 IC1
S2S6M 13 8 SD0
VDD T1
2 14 9 SD1
VDD T2
10 SD2
C13 T3
11 SD3
T4
47/6.3
24 12 SD4
VM T5
2 2 15 SD5
T6
C11
16 SD6
T7
17
0.1 SD7
T8
1 1 7 18 SDP
GND T9
26 19 SCRST
C12
GND T10
27 20 BSY
GND T11
21 SEL
T12
22 I/O
T13
R4 23 C/D
T14
2 3
MSG
EN T15
4 REQ
T16
10K
1 5 ACK
NC T17
25 6 ATN
TSD T18
BH9595FP-Y
18 19 20 21 22 23
2
C6
47/6.3
1
C4 C5
C3
0.1
0.1 0.1
CN2
REQ 1
1
MSG 2
2
I/O 3
3
SCRST 4
4
ACK 5
5
BSY 6
6
7
7
SD0 8
8
9
9
SD3 10
10
SD5 11
11
SD6 12
12
SD7 13
13
14
14
C/D 15
15
16
16
ATN 17
17
18
18
SEL 19
19
20
SDP
20
SD1 21
21
SD2 22
22
SD4 23
23
24
24
25
25
L2
DBLC-J25SAF-20L9F
L1
EXCML20A390
EXCML20A390
VS-840/840S
24 25 26 27 28
19