JRC JMR-92 Series Field Service Manual page 647

Before conducting Unit replacement work, always be sure that every
cable-tie that fastens the cable has been removed.
Replacement work without the above may lead Unit/cable breakage.
Step 3 Change the PSU.
Remove the screws (M4: 4 locations) of the mounting plate and pull out the PSU from the
mounting plate.
After replacing the PSU, assemble to the original condition by repeating the same procedure in
the reverse order. Please make sure to tighten all the screws and set all the switches back in
place.
Step 4 Check operation.
After PSU replacement is completed, turn ON the circuit breaker for the power supply of the
display unit and check the operation as follows.
(1) Turn ON the power to the display unit, make sure that screen display is normal, and there
are no abnormalities in operation and processing.
(2) If a scanner unit is being connected, start [RADAR] on the Task menu, perform
transmission, and check that normal radar images are displayed.
This completes PSU replacement.
Chapter 4 Replacement procedure 4-426