JRC JMR-92 Series Field Service Manual page 516

Step 4 Replace the modulation unit.
Remove all the cables that are connected to the modulation circuit and remove the three screws
(M4) that hold the modulation unit.
Remove the three screws (M4) that hold the modulation unit outside of the transmitter-receiver
unit and the two bolts inside of the modulation unit.
Chapter 4 Replacement procedure
Remove
Remove
Remove
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