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Old 5th Feb 2021, 12:21 pm   #493
Join Date: May 2012
Location: Perth, Scotland
Posts: 694
Unhappy Re: Non-working Commodore PET 3016

Originally Posted by SiriusHardware View Post
Scope tests of UE9 and UE10 pin 10 attached.
That still seems to indicate a significant resistance between your scope ground and those pins. (You should really just have a flat line). What resistances do you see if you measure from UE9 pin 10 / UE10 pin 10 to UG4 pin pad 8?
I get readings of either 0.000 or -0.000 with red/black probes either way round.

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