Which ACT244 for Fixed 1

I'm still looking for that pic for you!

Weak DCS signals, Failed TIU Output Drivers, and Design Solutions devloped under collaboration between AGHR and MTH | O Gauge Railroading On Line Forum (ogaugerr.com)

posted by GRJ to Susan to show which chips control which channels

Weak DCS signals, Failed TIU Output Drivers, and Design Solutions devloped under collaboration between AGHR and MTH | O Gauge Railroading On Line Forum (ogaugerr.com)

Thanks Joe. The top pic shows the ACT244s but not which channel each goes to. Only Fixed 1 is bad on mine so I don’t have to mess with the other three. I was surprised with all the discussion here there is nothing that identifies them, at least that I was able to find so far.

Pete

Sorry, I thought this was answered. I wasn't at the PC with my photos and documentation archive.

I traced the input to the matching ATC244 and then also the matching TVS for a given channel

Thank you Vern. I would have guessed that one but wanted to be sure before I start hacking pins off. Mine came with no TVSs so I am going with the larger ones MTH suggested first. If still no joy then I will likely go with John’s boards.

Pete

Thanks again Vern, added the TVSs and replaced U341. This after starting with 1’s.

Pete