PC Engine Duo cermic cap question

[MNKyDeth]

I have a board here that I think I have some bad ceramic caps on at location C618 and C617 but I cannot find good values for these caps anywhere. uF rating or volts.

They are next to IC505

Any help is appreciated.

[Fidde_se]

What makes you think they are bad?

[MNKyDeth]

One fell off the board from corrosion in that area. The other one is very discolored compared to any other boards I have. I just cant seem to get readings that are the same across the couple of machines I have here.

Anyways, I found the one that fell off under the pcb and soldered it back on. The sound works but it a little low. So I am going to check other areas for now. But I still wouldn't mind knowing the values of those ceramic cap locations.

[ltpitt]

I hope this can be of help:
https://www.dropbox.com/s/piekr98spi1foxt/pcengine.jpg?dl=0

User Keith Courage repaired my beloved Pc Engine GT and now it roars, happily.

Good luck!