EBME Forums Forums Maintenance Service Manuals & Schematics Need Pinout/Enable Signal for TECTROL TC89M-1429

Welcome to the forum Mohamed.

Am I right in thinking that this is an old machine?

Have you taken a close look at the power supply?

Anything suspicious there ... blown capacitors, for instance?

Any other clues or information ... fan not working. etc?

Meanwhile, here is an interesting YouTube video. I think the guy answers your question ... but it's in Spanish (maybe Portuguese). Try the Google translator.

It gives something like:-

U440 . OPTO MOC 8102 , JOIN PIN 4 AND 5 (COLLECTOR AND TRANSMITTER) ... presumably:- emitter.

Good luck!