Hi there, (calling all you EE types)

I've got a Rocky and Bullwinkle that is having some issues, and I'm almost certain I've traced the issues back to a bad power supply. I'm getting a low 5V output from it.

TP1: +0.571Vdc
TP2: Ground
TP3: +12.1 Vdc
TP4: -12.2 Vdc

So from my understanding of the board, 9vac comes in from CN1, and then goes to C2 (100uf 25v) D3 (14001N) and then onto IC1 (MC1723CP) TR5 2n6057, and then finally R6 DIRECTLY to output the 5vdc (just saying that I'm not going to go through and list all the components. If I were to start poking around, where do you think I should guess to point to as the culprit.

I would love to not have to replace the whole board with a new board for cost reasons, but I'm also not sure I want to go buy $50 in parts kits, spend hours desoldering and resoldering and then a few years off my life for breathing in the fumes and pulling every last hair out of my head trying to rebuild it properly.

Capacitors replaced and it boots and plays! Thanks for the help.

What causes these two in particular to go bar so normally?

Now to figure out the DMD and sound issues!!

Thanks for the info! This is super helpful information. Replacing C2 solidified 5v, it sent the 12v out of wack. I just happened to have one lying around. I'm going to go ahead and order a full cap kit for both the PSU and the Sound Board since they're both giving me issues.

Thanks for all the help everybody. This is a learning experience for me in a lot of ways. Appreciate it.

With the pot unplugged I still get deafeningly loud sounds. I've seen a few threads started about this deafeningly loud sound issue but none with any resolve. Will do some more digging.