Akai AX80

7-3.
ADJUSTMENT
OF
SAWTOOTH WAVE LEVEL
1)
Turn
the
power off and
on again.
Do
not
touch any
keys
on the
keyboard.
2)
Select
the Memory
Bank
(e.g. Bl)
used for the
previous
adjustment.
3)
Set the
unit
to
Edit
mode and
set the
parameters
as
follows.
Parameter
Button
Function
Display
Date
1
FREQ
RANGE 16
2
WAVE
2
3
PW
0
4
PWM
0
5
SUBOSC
0
6
OSC-1 LEVEL
99
13
OSC-2
LEVEL
0
24
LFO
SELECT
1
20
LFO
0
4)
Connect
the
oscilloscope
probe
to
the
Test Point
C38(TP)
and
TP-IO(GND).
5)
Press the
key from
C 1 to C2 one
by
one and
adjust
by turning
VR102
to VR802 for
required
Voice
No.(refer
to
the
table
below),so
that
the
duty cycle of the
square
waveform is
50%.
VOICE
No.
VR No
*Key
No
1
102
CI (Lowest)
2
202
Dl
3
302
El
4
402 Fl
5
502
Gl
6
602 Al
7 702 Bl
8 802
C2
*
Key numbers are indicated
as
the
FREQ
RANGE at
"16"
setting
(See
Fig. 4-1)
500mV
>2mS
W
SOOmV
~
=
>2mS
Fig.
7-5
(a)
Square waveform
Fig.
7-5
(b)