RU familiar with Scholer-Johnson boards?

[Victor Xray]

I have 4 P1225 portables, and each one has the red SJI 1225 board installed in place of the traditional DTMF PCB. These radios will no longer be on an LTR system, so I just want to use them conventionally.

Ideally, I'd like to keep the SJI boards installed but bypass their LTR functionality so I can just program & use the radios conventionally, like normal P1225's. But here's the problem: when I disable the option board in the RSS, I lose RX audio on all channels during conventional operation. They transmit fine, but even with the volume turned all the way up, I can barely hear the calling party. This issue occurs with all 4 radios. Now, if I replace the SJI-1225 board with a regular 1225 DTMF board, the radio works perfectly with loud RX audio. But with the SJI installed, no RX audio.

Have you had similar experience with these Scholer-Johnson boards? What's the fix? Alternatively, anyone have any cheap 1225 DTMF boards (HLN9432)?

[escomm]

I'd recommend calling SJI directly and asking them. They tend to be helpful most of the time