JRC JMR-92 Series Field Service Manual page 870

Symptom
No radar image is
displayed.
Cause
Strong wind of relative wind velocity
exceeding 100 kt (about 51.5 m/s)
is blowing.
The scanner unit is faulty.
The RIF (CQD-2273) is faulty.
The internal wiring is faulty.
The PSU (NBD-913) is abnormal.
The CCU (NDC-1590) is faulty.
The connection with the scanner
unit is abnormal.
The GAIN value is set to the
minimum.
The SEA/RAIN value is set to the
maximum.
The magnetron is deteriorated
significantly.
(Case where an scanner unit that
uses a magnetron is connected）
The scanner unit is faulty.
The RIF (CQD-2273) is faulty.
The internal wiring is faulty.
The PSU (NBD-913) is abnormal.
The CCU (NDC-1590) is faulty.
7-47
Action
When strong wind of relative wind
velocity exceeding 100 kt is blowing,
the scanner unit does not rotate due
to the protection function.
Make a request to the distributor for
repair.
Make a request to the distributor for
repair.
Make a request to the distributor for
repair.
Make a request to the distributor for
repair.
Make a request to the distributor for
repair.
Check the connection with the
scanner unit.
Set a proper value for GAIN.
Set a proper value for SEA/RAIN.
Replace the magnetron.
[Note]
For magnetron replacement, always
request the work to the specialized
service person. Before starting the
work, turn off the power supply of the
display unit. Otherwise, an
unexpected accident may occur.
Make a request to the distributor for
repair.
Make a request to the distributor for
repair.
Make a request to the distributor for
repair.
Make a request to the distributor for
repair.
Make a request to the distributor for
repair.
Chapter 7 Troubleshooting