5.4.3 -
Calibrating
the
Mod
Levers
On
new instruments, Mod Levers are calibrated at the factory
and
do not need any adjustment
in
the ,field. If you replace the
Mod
Levers
or
the Slider board, then the
MO,d
Levers must be
re-calibrated.
The steps are:
1. Put the instrument
in
its default settings, preferably with
battery-backed memory cleared.
2.
Turn the power off and open
up
the Front Panel.
3.
Turn the power back on, leaving the Front Panel
in
its
service position.
4.
Turn the LOWER trimpot
on
the Slider board while hitting a
piano note and listening to the pitch.
5.
Listen for the "dead band" where the pitch of the piano note
is constant and center the trimpot
in
that range.
6.
Now enable Assignable control 1 (vibrato rate) and move the
Assignable slider 1 to mid-scale (34Hz vibrato).
7.
Adjust the UPPER trimpot to minimize the amount of
vibrato with the right
Mod
Lever at rest position.
Kurzwell 250 Service Manual, Chapter 5
5
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1
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