Pac Man with distorted sound

TheDrewster

Well-known member

Donor 2012
Joined
Oct 5, 2008
Messages
7,668
Reaction score
314
Location
Reno, Nevada
I just bought a board off ebay and its not working right. It sounds fine for about 30 seconds after it turns on, but then gradually, the sounds and music start deteriorating. Anybody had this problem before?
 
Is the heatsink getting finger blistering hot?

If so, you have something miswired on the speakers. I have this happen if I forget and leave my JAMMA test rig wired up for MVS stereo speakers.

If not, recap it. Don't forget the little tantalum cap under the heat sink too.

RJ
 
Is the heatsink getting finger blistering hot?

If so, you have something miswired on the speakers. I have this happen if I forget and leave my JAMMA test rig wired up for MVS stereo speakers.

If not, recap it. Don't forget the little tantalum cap under the heat sink too.

RJ

Nope, the heat sink temp seems normal. Do you know which of the 6 caps would be linked to the sound problem? Or does someone have a cap kit for Pac boards?
 
Back
Top Bottom