JRC JRL-2000F - Alarm List and Inspection

Alarm list
Display
A1
A2
A3
A4
A5
A6
A7
A8
A9
Cause and operational
condition
The output voltage from the
power supply unit has
dropped while the is
on. The cause is usually
a
sudden drop in the AC line
voltage.
Over-current (30 A or more)
or over-heating (80°C or
more) in the power supply
unit.
Excessive voltage in the AC
input line (270
V or more)
The power amplifier unit has
been over heated.
(80°C or more)
Output balance for the
4
power amplifier circuits is
uneven.
The excitation power from
the exciter is excessive.
(approximately 130 W)
The power from the exciter
is excessive during the
automatic tuning operation.
(80 W or more)
Matching with the antenna
has not been achieved
during the automatic tuning
operation.
The antenna VSWR is too
high.
The load seen from the
power amplifier is abnormal.
Meaning
Abnormality in
power supply unit
Abnormality in
power supply unit
Overheated
power amplifier
Unbalanced
power amplifier
Over-excitation
Excessive tuning
power
Abnormal
automatic tuning
Abnormality in the
antenna
Abnormal power
amplifier load
Inspection and corrective
measures
Check the power supply line
(1 10 or 220V AC).
Also, verify that the output is not
excessive.
If the power amplifier current is excessive,
decrease the exciter power.
Check the voltage in the power supply
line.
Check the ventilation.
Verify that the output is not excessive, that
the air filter is not clogged and that air is
flowing normally.
If the fuse in the power amplifier section is
blown, replace it with
a new one.
Verify that the idling current is
approximately
6 A.
Reduce the power from the exciter.
Reduce the power from the exciter
Correct power is 30
- 80 W.
Check the antenna connection and the
VSWR value.
Verify that the correct antenna is selected
for the operating frequency, and that it is
properly connected.
Verify that the automatic antenna tuning
operation has been correctly implemented
and
if necessary, perform the automatic
tuning operation again.
Also, verify the following
:
That the antenna is normal.
That there is no abnormal output from the
exciter (the linear amplifier output
deviates resulting in oscillation).