Circuit Diagram (Main Pcb Assy/Fdc Block) / (Main Pcb Assy/Lcd Contr. Block) - Roland Va-3 Service Notes

1 2 3 4 5 6
CIRCUIT DIAGRAM (MAIN PCB ASSY/ FDC Block)
A
B
C
D
E
F
A[0..1]
D[0..7]
G
5VD
H
C120
100nFs
C119
100nFs
XFDCRST
D
XRD
XWRL
XFDC
I
XFDCINT
XDREQ1
XDACK1
A1
9
XFDCDEND RS1 NC
A0
8
FDCCONT RS0 NC
XIDXINT
RDYCNTL
MON3
MON2
J MON1
D7
19
D7
D6 18
D6
5VD D5 17
D5 DS3
D4
16
D4 DS2
D3
15
D3 DS1
D2
R68 14
D2
10Ks D1 13
D1
D0 12
D0 HLOAD
K
XFDCRST
3
RESET
C121 XRD 4
E,RD INP
10nFs XWRL 5
R/W,WR INDEX
XFDC
D 6
CS DS0
XDACK1 XFDCINT
21
IRQ
MON0
L
R67 XDREQ1 20
DREQ HDIR
7
DACK STEP
XFDCDEND
22
DEND WDATA
0s
WGATE
C141
TRK0
39
XTAL1 WPRT
TP14
RDATA
X2
10pFs
HSEL
16MHz
C142 READY
M MA-406
niu
40
EXTAL1
1/2EX1
D 10pFs 36
XTAL2
37
EXTAL2
FDCCONT
1
8"/5"
2
XTALSEL
28
IFS
26
NUM1
N
27
NUM2
D
O
IC23C IC23B
XIDXINT
2 6 5 3
TC7W14F TC7W14F
P
RDYCNTL
Q
R
S
T
U
7 8 9 10 11 12
5VD
10Ks
R73 NIU R80
XREADY FDS3
R74 1Ks
R81 10Ks
XRDATA FDS2
R75 1Ks R82 10Ks
XWPRT FDS1
R79 1Ks R83
10Ks
IC16 XTRK0 FDS0
HD63266-FP-64A
R78 1Ks
XINDEX
R77 1Ks
XINP
C124
XINP
38
NIU
5VD 5VD
43
C123
C125
5VD XINDEX
R71 100nFs NIU
63 R69
10Ks 10Ks
62
C126
FDS1
61
NIU
D
58 XDS3 1
57 4
56 2
C128
XHDIR
IC15
NIU
TC7S08F
52
C129
XSTEP
NIU
D
FDS1
30 XINP
34 XINDEX
C134
XDS0 XWDATA
55
47pFs
C135
60 XWGATE
47pFs
51 XHDIR
50 XSTEP
C130
XWDATA XTRK0
48
NIU
XWGATE
47
33 XTRK0
C131
32 XWPRT XWPRT
NIU
35 XRDATA
XHSEL
53
C132
XREADY XRDATA
31
NIU
C133
24 XHSEL
NIU
D
5VD
C122
5VD
100nFs
IC23D
C127
D
100nFs
TC7W14F
1
4 XREADY
2 D
IC14
TC7S32F
D
VA-3
13 14 15 16 17 18
CIRCUIT DIAGRAM (MAIN PCB ASSY/ LCD Contr. Block)
DATA BUS
D[0..7]
A0
5VD
XRD
XWRL
XLCD
R76 XRST
10Ks
CN17
34 P MALE CONN. P.1,27
XINP
2 1
4 3
FDS3 6 5
XINDEX
8 7
FDS0
10 9
FDS1
12 11
FDS2 14 13
16 15
XHDIR 18 17
XSTEP
20 19
XWDATA
22 21
XWGATE
24 23
XTRK0 26 25
XWPRT 28 27
XLCDINT
XRDATA
30 29
XHSEL
32 31
34 33
TO FDD UNIT PC/AT D 10MHz
XRD
XWRL
XLCD
XRST
LCD CONTROL BUS
XD3
XD2
XD1
XD0
XSCL
YD
LP
IC23A
1 7 TP9
TP
TC7W14F
niu
D D DISPON
DISP_CON
20
19 20 21 22 23 24
5VD
C114
IC11
IC12
SED1335F0B HM62256ALFP-7
100nFs QFP6-60 pin 256KBit RAM 70ns SOP 28 pin
D
10MHz 17 50 VD0 11
OSC1 VA15 D0
VA14 VD1
18 51 12
OSC2 VA14 D1
VA13 VD2
52 13
VA13 D2
D7 VA12 VD3
29 53 15
D7 VA12 D3
D6 VA11 VD4
28 54 16
D6 VA11 D4
D5 VA10 VD5
27 55 17
D5 VA10 D5
D4 VA9 VD6
26 56 18
D4 VA9 D6
D3 25 57 VA8 VD7 19
D3 VA8 D7
D2 24 58 VA7
D2 VA7
D1 23 59 VA6
D1 VA6
D0 VA5
22 1
D0 VA5
VA4
2
VA4
VA3 5VD
20 3
A0 VA3
VA2
4
VA2
VA1
13 5 28
RD VA1 VCC
VA0
14 6
WR VA0
19
CS
10 42 VD7
RES VD7
VD6
43 14
C115 VD6 GND
VD5
15 44
10nFs SEL2 VD5
VD4
16 45
D
SEL1 VD4
VD3
46
D VD3
C116
XD3 VD2
30 47
XD3 VD2
XD2 VD1 100nFs
31 48
XD2 VD1
XD1 32 49 VD0
XD1 VD0
XD0 33
XD0
7 XVWR
VWR
XSCL XVRD
35 9
XSCL VRD
XCCE
34 8
XECL VCE
37
LP
38
WF
41 11
YSCL NC
YD 40 12
YD NC
39 60
YDIS NC
D D
5VD
5VD
C190
100nFs IC38
2 5
D Q
1
D
2 4 1
CK
TC7S04F 3
Q
IC37A
D
TC7W74F
XRST
5
3
6
IC36B
TC7W08F
Jan, 2001
25 26 27 28 29 30
10 VA0
A0
VA1
9
A1
VA2
8
A2
VA3
7
A3
VA4
6
A4
VA5
5
A5
VA6
4
A6
3 VA7
A7
25 VA8
A8
24 VA9
A9
VA10
21
A10
VA11
23
A11
VA12
2
A12
VA13
26
A13
VA14
1
A14
20
CS
22
OE
27
WE
5VD
R63 R62
NIU
0s
C189 IC36C
100nFs
D
D
TC7W08F
5VD
D
IC36A
IC37B
1
7
2
TC7W08F
TC7W74F
D
C191
100nFs