JRC JMR-92 Series Field Service Manual page 245

Step 3 Replace the fan.
Remove the four screws (M4) to replace the fan. 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 4 Operation check
After completing the replacement work, turn On the safety switch and follow the steps below to
check the operation.
(1) Turn On the Display unit. After the countdown is completed, start transmission and check
that the radar image appears without error. Check that no fan alarm comes up.
This completes modulation unit fan replacement.
Disconnect the cables.
T/R control circuit board
Fan
4-25
Remove the
four screws.
Chapter 4 Replacement procedure