JRC JMR-92 Series Field Service Manual page 871

Symptom
Radar images cannot
be tuned
The azimuth of the
radar image is not
displayed correctly.
The range of the radar
image is not displayed
correctly.
Interswitch Unit does
not function.
If the power supply is
turned off, the trail data
is cleared without being
stored.
Chapter 7 Troubleshooting
Cause
The magnetron is deteriorated
significantly.
(Case where a scanner unit that
uses a magnetron is connected）
A solid-state scanner unit is
connected.
The azimuth is not set correctly.
CCRP is not set correctly.
The GPS antenna position is not
set correctly.
The range is not set correctly.
CCRP is not set correctly.
The GPS antenna position is not
set correctly.
Power for the Interswitch Unit is not
turned on.
The connection with the Interswitch
Unit is abnormal.
The Interswitch Unit is faulty.
The RIF (CQD-2273) is not set
correctly.
The RIF (CQD-2273) is faulty.
The internal wiring is faulty.
The CCU (NDC-1590) is faulty.
The CCU (NDC-1590) is faulty.
7-48
Action
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.
Tuning bar is not displayed for a
solid-state scanner unit.
Set the azimuth correctly.
Set CCRP correctly.
Set the GPS antenna position
correctly.
Set the range correctly.
Set CCRP correctly.
Set the GPS antenna position
correctly.
Turn on the power for the Interswitch
Unit.
Check the connection with the
Interswitch Unit.
Make a request to the distributor for
repair.
Set the RIF correctly.
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.