JRC JMR-92 Series Field Service Manual page 351

Step 3 Replace the relay filter circuit board.
Remove the screws holding the relay filter circuit board in place (four M4 screws) and replace it.
After having replaced the relay filter circuit board, reassemble the unit following 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 4 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 relay filter circuit board replacement.
Remove the four screws.
Relay filter circuit board
4-131 Chapter 4 Replacement procedure