Roland AX-7 Service Notes

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13
11
AX-7
Nov, 2001
CIRCUIT DIAGRAM (CPU PCB ASSY 3/3)
PULSE
To Left Control Board
To Right Control Board
(CN3)
(CN3)
RW3
RW4
RW5
RW7
RW6
RW5
RW6
RW7
RW3
RW4
SSC0
SSC1
SSC2
SSC3
RW1
RW0
RW2
RW2
RW1
RW0
LLD7
LLD5
LLD0
LLD1
LLD4
LLD6
LLD3
LLD1
LLD6
LLD7
LLD2
LLD2
LLD5
LLD0
LLD4
LLD3
SSC0
SSC1
SSC2
SSC3
MOD
DATA
DATA
MOD
VREF
BEND
GNDREF
BEND
HLD
HLD
SSD1
Y3
Y0
SSD0
TXK
RXA
GND
RRW7
RRW1
Y0
Y1
RRW2
Y3
Y4
RRW1
RRW7
Y3
SSD2
TXA
CL4
CL3
SSD1
RRW1
Y0
SSD0
Y4
RXA
Y4
RRW3
RXK
Y5
CL1
CL4
SSD2
RRW7
CL2
RRW5
Y1
Y4
CL2
RRW4
CL1
CL3
RXK
RRW0
TXK
RRW6
Y0
RRW5
Y2
RRW2
Y5
SSD1
RRW2
Y2
Y5
CL0
SSD2
RRW4
RRW3
CL3
RRW0
SSD3
Y2
SSD0
Y2
RRW0
TXA
Y1
Y1
SSD3
RRW6
CL0
GND
DATA
MOD
BEND
LLD6
LLD2
LLD7
LLD5
SSD2
LLD4
SSD3
SSD1
LLD3
SSD0
LLD1
LLD0
TXA
RXATXK
RXK
PULSE
RXK
RXA
TXK
TXA
SSC0
SSC1
SSC2
SSC3
HLD
BEA
M
D
+5VD
D
D
+5VD
D
D
4V
8V
+5VD
+5VD
8V
4V
A
A
8V
A
A
REF
D
D
5VREF
D
A
D
IC21
74HC138P
1
2
3
6
4
5
15
14
13
12
11
10
9
7
16 8
A
B
C
G1
G2A
G2B
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
VCC GND
R77
330I
Q7
2SC1815GR
3
1
2
R91
0s
R98
NIU
R97
0s
R65
10I
Q9
RN2227
3
1
2
R71
0s
R70
NIU
C96
100nF
s
CN6
28FE_ST_VK_N
3
4
5
6
7
8
2
1
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
R72
100Ks
R73
10Ks
R76
100s
R81
330I
C93
150pFs
R79
1_8
R78
100s
C90
100nFs
C86
10uF16s
R82
330I
R83
330I
C89
10uF16s
R75
NIU
R74
NIU
C92
NIU
R66
0s
C91
33uF16s
Q11
RN2227
3
1
2
Q12
RN2227
3
1
2
R84
330I
R85
330I
Q10
RN2227
3
1
2
R86
330I
R87
330I
-
IC20B
UPC4570G
6
5
7
-
IC20A
UPC4570G
2
3
1
R64
10Ks
-
IC20C
UPC4570G
8 4
C88
100nFs
C87
10uF16s
R69
10Ks
D12
DA204K
2 1
3
C95
10uF16s
C85
10uF16s
Q13
RN2227
3
1
2
R80
1_8
R67
22
IC22
TD62583AP
109
8
7
6
5
4
3
2
1
11
12
13
14
15
16
17
18
NCGND
I7
I6
I5
I4
I3
I2
I1
I0
O7
O6
O5
O4
O3
O2
O1
O0
Q8
2SC2235Y
3
1
2
C100
100nF
s
R68
22
R88
NIU
CN9
22FE_ST_VK_N
3
4
5
6
7
8
2
1
9
10
11
12
13
14
15
16
17
18
19
20
21
22
C94
10uF16s
R95
NIU
R96
0s

Roland AX-7 Specifications

Power

power supply	Batteries, AC/DC adaptor (DC 9V)
power supply option	Roland ACA adaptor (9V, 200mA)
connectors	DC IN (adaptor)

Keyboard and Display

keyboard	45 keys, velocity sensitive
display	3 x 7 segments
realtime controllers	Data Entry knob, Expression Bar/Touch Controller, D Beam Controller, Sustain button

Weight and Dimensions

width	1010 mm
depth	195 mm
height	102 mm
weight	3 kg