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SYMPTOMS
CAUSE
REMEDY
An antenna
is connected
and the cali-
brator
signal is received,
but no signals
are heard.
. The ANT switch is towards the REC
ONLY jack.
. RF
ATT
control
is turned
fully
counterclockwise.
Bad T/R relay (RL2).
. Push the switch towards the SO-
239 connector.
. Turn the control fully clockwise.
. Replace the relay.
One
or
more
bands
are
operating
but
some
are not.
. The
heterodyne
oscillator
is
not
operating
on
the
defective
band.
. The ANT
coil of the defective band
requires alignment.
. See
Section
6.2.
. See Section 6. 2.
Low AF volume or distorted AF.
. Balanced
detector
is out
of adjust-
ment.
. AF
board audio amplifier idling cur-
rent requires adjustment.
. See Section
6.13,
. See Section 6.14.
S-meter deflects without a received signal.
. Balanced
detector
is out of adjust-
ment.
!F board
is out of adjustment.
. See Section
6.13.
. See Section
6.8.
S-meter reads too high or too low.
RIT
lamp lights when the RIT switch is
turned
on, but the RIT/XTAL
control
will not change the frequency.
IF board is out of adjustment.
. See Section 6.8.
Defective
or
open
two-prong
con-
nector
on
the VFO
board.
Defective
VFO
board,
Repair
the
connector.
Repair
the
board.
Lack of sensitivity on one or more bands.
Receiver * section requires alignment.
. See Section 6.2.
The RIT/XTAL
control is at zero with
the RIT circuit on, but the receive and
transmit frequencies are different.
7.3.
TRANSMITTER
SECTION
SYMPTOMS
. The RIT control is out of adjustment.
CAUSE
. See Section 6.12.
REMEDY
T. MUTE
lamp does not go off when the
HEATER
switch is turned off.
. SG switch is off.
. Slide the switch on.
ALC meter deflects with no output
(no
plate current).
. No high voltage (+800 v) on the final
tubes.
Bad 6LO6 tubes.
. Check the power supply output.
. Replace the tubes.
40
ALC
meter
does not deflect and there
is no
output.
. SG bias switch of the 6GK6 is turned
off.
Defective
circuits
before
the driver
stage.
. See Section 6.7.
. Repair
the
circuit.
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