Finally got one of my two FM projects up and running with the old classic QSI/Proto 1 set-up. All was fine 'til we went for the horn in neutral. Ooops, you can't go there in this old version, at least not without a reset. In this case, good old number 25. So I had horn with both Z4000 buttons while running and bell with both buttons while in neutral. That's the factory set up with this old board. So after doing a #25 reset, what happens? Lost the bell altogether, with either button, while stopped or running ! What to do??? Consult the hive mind.....so here we are ...lost in the nineties with a protocol issue from aeons in the past. Anyone remember how to get outta this mess? I have plenty of other PS1 units without this entanglement. FWIW, the instructions got me into this affair....and now my bell function is lost at sea ! The battery, etc. is all in good order too. Could it be a polarity thing? The bell and horn buttons are properly oriented, but could the board somehow reversed itself??
thanks, gents !