JRC JMR-92 Series Field Service Manual page 334

Step 3 Remove the fan cable.
Remove the cable for the fan that is connected to the T/R control circuit board.
Loosen the screws (nine M4 screws) holding the cover in place, remove the screws (two M4
screws) holding the heat radiation plate in place, and remove the cover.
Chapter 4 Replacement procedure
Remove the five
cables.
Remove the three
screws.
Remove the cable.
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