JRC JMR-92 Series Field Service Manual page 522

Step 3 Replace the T/R control circuit board.
Remove the cables connected to the T/R control circuit board and the screws (seven M4
screws) and replace the T/R control circuit board.
Set the DIP switch and jumper pins of the T/R control circuit board to suit the
NTG-3230.
After replacing the T/R control circuit board, assemble the unit in the reverse order of the
disassembly procedure. Do not forget to tighten the bolts or screws, and make sure that the
cables are connected.
Chapter 4 Replacement procedure
Loosen the four screws.
T/R control circuit board
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