JRC JMR-92 Series Field Service Manual page 327

Step 4 Replace the fan.
Remove the screws (four M4 screws) holding the fan in place and replace it. After replacing the
fan, assemble the unit in the reverse order of the disassembly procedure. Do not forget to tighten
the bolts or screws, and make sure that the cables are connected.
Step 5 Operation check
After having completed the replacement, turn On the safety switch and 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. Check that the fan alarm is not triggered.
This completes magnetron fan replacement.
Remove the four
screws.
4-107 Chapter 4 Replacement procedure