The +15V rail reading 20V without anything connected is probably OK (as long as it dips back down to 15 under load). The -15V rail readings you mentioned are definitely off. The power supply should not be reconnected to the rest of the unit until you get that part sorted. Check out Q2. I have also s...

cosmolac wrote: ↑

Fri Dec 18, 2020 1:28 pm

weird i double checked and on connector 1 from the psu im getting 15 and 5 within range but -15 is reading as +1v?

Let's get that negative power rail figured out. Does it still read +1 with all the connectors going to the other boards pulled?

Hey all. I've been working on a Jupiter 6. (my first repair on a Jup) Everything was relatively OK with it outside of some bad pots and a dead battery. Swapped the pots, installed the new battery, and suddenly, it started acting very weird and then it would not boot. Now only getting "protect" LED a...