JRC JMR-92 Series Field Service Manual page 267

Step 4 Replace the relay filter circuit board
Remove the cable connected to the relay filter circuit board and the four screws (M4) to replace
the relay filter circuit board. After replacing it, follow the disassembly procedure in the reverse
order. Do not forget to tighten the bolts or screws, and make sure that the cables are connected.
Step 5 Operation check
After completing the replacement work, 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.
This completes T/R control circuit board replacement.
Remove the screws.
Relay filter circuit board
4-47 Chapter 4 Replacement procedure