JRC JMR-92 Series Field Service Manual page 344

Marine radar equipment, ecdis conning display
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Step 4
Replace the power supply circuit board
Remove the screws (six M4 screws) holding the power supply circuit board in place and then
replace it.
If the thermal conductive pad on the casing on the back of the power supply circuit board (the
soldered side) is damaged, affix a new one to the replacement power supply circuit board.
After having replaced the power supply 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 5
Operation check
After having completed the replacement, turn On the safety switch and check operation by
following the procedure below.
(1) Turn On the radar and emit radar waves once the countdown is finished, and check that
the radar image is correctly displayed.
This completes power supply circuit board replacement.
Chapter 4 Replacement procedure
Remove the six screws.
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