—32—
The frequency
does not
change
by
rotating
the
Tuning knob.
. The scale on the Tuning
knob is not in calibration
with
the
displayed
fre-
quency.
The
last
digit
of
the
memorized
or displayed
frequency has changed to
0.
An abnormal figure is dis-
played on the display, or
the
display fails to illu-
minate.
The
memorized _ fre-
quencies are lost and the
display
shows
145.000.0
when the power switch is
turned ON.
Unable to key when using
an electronic keyer.
18.
The
scan operation
does
not
function
when
the
MS/MW switch is pushed.
DIAL
LOCK
is engaged.
The TUNING SPEED button was
depressed when
the Tuning knob
was
set with
one
of the
small
increments
at the
center
point,
the
Tuning
knob
was
rotated
when
the
DIAL
LOCK
was
engaged.
The TUNING
SPEED button was
pressed, or the VFO Select switch
was
turned
while
pressing
the
TUNING
SPEED
button.
The
Power
switch
was
turned
OFF and ON too quickly.
The
memory
switch
was
turned
OFF.
The
main
switch
of the
power
source
was
turned
OFF
or the
power plug was unplugged.
The power failed (when using the
AC power source).
The Switching circuit of the ele-
ctronic
keyer
does
not _ close
completely.
Polarity of the connection
wires
from the keyer is reversed.
The
MODE
switch
is not in the
CW position.
No frequency
is programmed
in
the memory channels or the same
frequency
is programmed
in all
the memory channels.
Disengage
the
DIAL
LOCK
by
| moving the DIAL LOCK switch.
Set the Tuning dial so that one of the
large increments is at the center point,
and push the TUNING
SPEED
but-
ton, and the scale will be calibrated.
Release the TUNING SPEED button,
and set the unit to the desired fre-
quency with the Tuning knob.
Turn
the
Power
switch
and
the
memory
switch
OFF,
wait
a
few
seconds,
and
then
turn
them
ON
again.
Turn ON
the memory switch on the
rear panel.
Use the continuous operating power
source
or optional
memory
power
source.
Replace the keyer with one having a
voltage of less than 0.4V between the
two
keying
lines at the key down
position,
or
modify
your
keyer so
that the voltage is less than 0.4 Volts.
Connect
the
keyer
wires
observing
proper polarity.
Place
the MODE
switch
in the CW
position.
Program
the required frequencies
in
the memory
channels
following the
instructions for "MEMORY-WRITE"
on page 20.
Need help?
Do you have a question about the IC-251A and is the answer not in the manual?
Questions and answers