JRC JMR-92 Series Field Service Manual page 517

Remove the modulation unit together with the plate and replace the modulation unit. After
replacing the modulation unit, reassemble the unit following the disassemble procedure in the
reverse order. Make sure that there are no omissions of magnetron installation, bolt tightening,
and cable connection.
Step 5 Operation check
After having completed the replacement, check operation by following the procedure below.
(1) Turn On the Display unit. After the countdown is completed, start transmission and check
that the radar image appears without error.
Transmit the radar wave in long pulse range mode and open the service engineer menu to
check that the magnetron current stands between the 5th and 7th calibration markings.
This completes modulation unit replacement.
4-297 Chapter 4 Replacement procedure