how to reseal a 41C module

[MeindertKuipers]

(10-06-2022 11:09 AM)BillBee Wrote:  As is the situation with mine, I assumed it was opened to check the continuity of the cables.

My understanding is that if Cat 2 is fine but a transmission error occurs (with the leads connected together) then the next step is to check if the cables are good.

-Bill

I had a similar issue with my HP-IL module that I purchased a few years ago. CAT 2 was fine, but no communication. After a long search I was able to locate a broken wire from the transformer to the PCB soldering, and fortunately I was able to resolder this wire, and I then had a fully working IL module.
So you need to check the cable continuity and if that is OK verify continuity of the transformer coils in all possible combinations and visually inspect the soldering (with a good magnifier glass).