The
next
CPU
test
is
the keyboard interface test.
TEST KEYBOARD? Press YES
KEYBOARD TEST
PRESS
ANY KEY
The first key
on
the left is numbered zero. The last key
on
the
right is numbered 87. The keyboard
is
divided into two keyswitch
boards. The
left half of the keyboard contains keys 0 through 43.
The right
half of
the·
keyboard contains keys 44 through 87. The
keyboard
split occurs between
E4
and F4 in the center
of
the
keyboard.
Pressing and holding down the
E4
key
on
the keyboard will NOT
sound
an
audible note, but will cause the front panel LCD to show:
EXAMPLE:
ATTACK KEY 43
TOF:FO. COUNT: 1
Releasing the
E4
key will cause the front panel display
to
show:
RELEASE KEY: 43
TOF: 93
COUNT: 2
NOTE:
The Time-Of-Flight (TOF) indicated will vary
depending upon how fast the key is pressed or released. A
fast key stroke
wills how a larger number (hexadecimal). A
very
slow key stroke will show 00 for the Time-Of-Flight.
The key number and count are
in
decimal. The count should
always be even when
no
keys are pressed down.
Press
SELECT
to
exit the keyboard test.
The next four tests require the loopback connectors provided
with the Diagnostic Kit.
1
TEST MIDI? Press YES
Kurzwell 250 Service Manual, Chapter 4
4-44
To Next Page
Loading...
