Operation - Akai AX80 Service Manual

Programmable polyphonic synthesizer
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B
G
H
K
a
b
2
c
3
C\J
d
4
Q.
e
5
CB
f
S
Q-
g
7
CPl
dp
3
TO
BO
9
6
8
B
(
POWER
SUPPLY
)
LINE
NOTE
UNLESS OTHERWISE
SPECIFIED
ALL RESISTORS
IN
OHMS
1/4W(J)
ALL
CAPACITORS
IN
uF 50WV(J)
POWER TRANSFORMER
IS
DIFFERENT
ACCORDING
TO AREA
2SA608K-NP
Voltages
at
IC106
to 806
were with B-type IC's voltages
with C-type IC's will
be
almost the
same.
Voltages
at the
ROM(IC4
in
the cpu-pcb) were with an
I-version, voltages with
a
K-varsion ROM will
be
almost
the
same.
The unit was
in
the PI
program mode with
no key
function(No
function change after
the
power SW was
"ON").
(D with voltage
indications were
for DC
voltages with
pulses, voltage may vary by the wave forms.
Voltage indication related with
FLD
D3
may vary with
a
K-varsion
ROM.
AX 80
OPERATION
(
I
SCHEMATIC DIAGRAM
no.
6-4
8503I2A
B
D
G
H
3C

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