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techknight

SE/30 video issue that has ME stumped!

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You cant swap in an HC for an LS, because that is TTL vs CMOS, they have very different logic level High and Low thresholds. 

 

And yes, I checked for that, although its been a very long time, I can check again as if I recall, I dont know if I was the one who changed the IC. 

Edited by techknight

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So, I pulled out that board, I had to remember where it was as its been a couple years. Sure enough, it has an HC166 in there. 

 

Didnt even think about it honestly. I checked my stashed that I was using and all of mine are LS166s like they are supposed to be. 

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