Good evening,
I disassembled the PSU again and checked capacitor C17, which has an ESR of 0.5 ohms—I think it’s fine. Then I tested transistor Q9, and it doesn’t show any unusual readings. Diodes VR4 and VR5 measure open in both directions, so everything seems to be fine there.
On the other hand, I rechecked the caps on the CPU board and the acquisition board and found some caps that don’t give any ESR value and others that measure out of the desired range. I tested them with my B&K 881.
I’ve made a decision to place an order with Digikey for the components in question and the solid caps. I’ll replace all the solid caps first.
Thank you very much for your advice; I’m truly grateful. I’ll update you on my progress as soon as I receive and replace the solid caps.
By the way, what would be a suitable replacement for C17? I haven’t been able to find anything similar on Digikey.
Thanks again, and good night.
