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Old 22nd Oct 2018, 9:49 pm   #15
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,482
Default Re: Retired Texas TI99/4A engineer needs help please.

Are you saying that with no load on any of the outputs you are getting spot-on 5V from the 5V output? If so then I would assume for now that the uA723 is OK, and the next thing you need to do is apply an ever increasing load on the 5V output, ideally monitoring it with a scope as well as a meter.

If the output collapses or develops bad ripple when you load it up, then you can go on from there.
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