JRC JMR-92 Series Field Service Manual page 521

4.2.2.5 T/R Control Circuit Board (CMC-1205R)
Replacement/NTG-3230
[Required Tools]
The tools shown in the following table are required for replacement work.
No Name
1 Flat head screwdriver 6 mm
2 Phillips
screwdriver(shielded)
Before conducting replacement work, turn Off the circuit breaker for the power supply of the
display unit.
Exercise care not to lose bolts, screws and other parts removed from the radar antenna, as
they will be used again in later steps.
Step 1 Back up the scanner unit data.
Before beginning the replacement procedure, open the service engineer menu of the radar
display unit and back up the scanner unit data (transmission time and motor rotation time).
If you do not back up this data, it will not be possible to maintain continuity in scanner data
such as the magnetron usage time
Step 2 Remove the cover.
Loosen the four screws and remove the cover. The screws are slotted captive screws.
Use a flat head screwdriver.
Table Required Tools
Size
Size #2
4-301
Appearance
Chapter 4 Replacement procedure