Roland AX-7 Service Notes

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12
11
AX-7
Nov, 2001
CIRCUIT DIAGRAM (CPU PCB ASSY 2/3)
PULSE:
DUTY:12.5%
FREQUENCY: 6.25KHz
PULSE WIDTH:20uS
(AN7)
FLAT
FLAT
FLAT
FLAT
FLAT
XDBPLS
PULSE
DIVEN
DBEAM
PULSE
BEA
M
BCLK
A
A
A
D
D
+5VD
A
A
D
8V
A
DD
D
4V
8V
8V
8V
4V
8V
D
8V
+5VD
+5VD
C83
10uF16s
Q6
2SA1037KR
2
1
3
D9
DAN202K
21
3
D10
DAN202K
21
3
D5
DAP202K
2 1
3
D8
DAP202K
2 1
3
R45
10KS
R43
22KS
C72
10nFs
VR1
EVND8AA03B24
20K
13
2
C68
10pFs R47
100S
R48
15KS
C69
100nFs
R49
33KS
D7
DA204K
2 1
3
C71
100nFs
R46
150s
R52
47Ks
R51
27KS
C84
100nFs
C82
100nFs
R62
3K3S
C75
100nFs
C73
100nFs
R40
820KS
R41
68KS
R42
12KS
C77
47pFs
R59
120KS
R44
2K2S
C78
47nF
P.5 5%
R57
100KS
R56
NI
U
C79
22pFs
C76
100nF
P.5 5%
R60
4K7S
C74
8200pF
P.5 5%
R50
10KS
R53
68KS
R54
120KS
R55
1KS
R58
1M
S
R61
1K5S
Q5
2SK368GR
3
1 2
IC16A
74HC10
1
2
13
12
IC16C
74HC10
9
10
11
8
IC16B
7
4HC10
3
4
5
6
IC16D
74HC10
147
R63
33KS
D6
BZX55C5V1
1 2
C81
10uF16s
C70
1uF16s
IC17B
74HC393
13 11
10
9
812
AQA
QB
QC
QD
CLR
IC17C
74HC393
7 14
GND
VCC
IC17A
74HC393
1 3
4
5
62
AQA
QB
QC
QD
CLR
L7
EXCCL4532U1
L6
EXCCL4532U1
D11
BZX55C5V1
1 2
TP
TP6
TP
TP7
-
IC23B
M5223FP
6
5
7
-
IC18B
M5223FP
6
5
7
-
IC18A
M5223FP
2
3
1
-
IC23C
M5223FP
8 4
-
IC23A
M5223FP
2
3
1
-
IC18C
M5223FP
8 4

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