MaximRecoil
Well-known member
Is there any way to adjust +5V on a Punch-Out power supply (PP-1000A)?
I've been having graphic problems with both my PO and SPO boardsets in my SPO machine, and usually doing things like cleaning the card edge and connector, and reseating the socketed chips fixes the problem temporarily. I suspected the power supply wasn't putting out sufficient +5 voltage. I just measured it at the card edge pins on the board and it is 4.89V, so I think that is the problem.
There's no obvious way to adjust +5V on this power supply, but maybe there is an internal way? If not, is there something internally that can be replaced to fix the problem? The simplest thing to do would be to use an ordinary JAMMA type switcher, but I don't want to hack the wiring harness.
I've been having graphic problems with both my PO and SPO boardsets in my SPO machine, and usually doing things like cleaning the card edge and connector, and reseating the socketed chips fixes the problem temporarily. I suspected the power supply wasn't putting out sufficient +5 voltage. I just measured it at the card edge pins on the board and it is 4.89V, so I think that is the problem.
There's no obvious way to adjust +5V on this power supply, but maybe there is an internal way? If not, is there something internally that can be replaced to fix the problem? The simplest thing to do would be to use an ordinary JAMMA type switcher, but I don't want to hack the wiring harness.