View Single Post
Old 9th Oct 2021, 9:23 am   #9
Join Date: Oct 2021
Location: Edinburgh, Scotland, UK
Posts: 136
Default Re: Commodore PET 2001 voltage regulators

I've measured the AC between pin 1 and pin 5 this morning and it comes out at as 15.9v AC. I checked it a few times and it seems pretty constant. I then checked the DC of the big capacitor; it read 1.83v. I tried the meter leads at various points around the screw terminals, and it was 1.83v at those points. I lef the PET on for a few minutes to check the voltages again, and they came in around the same values for both AC and DC.

It looks like my post from last night has been authorised, so it contains some of the pictures of the board/JP8 that were requested. Hope these help, and thanks again.
retromit is offline   Reply With Quote