Gottlieb System 80/80A Power Supply Repair and Test

[@pezjohnson]

I'm glad that you were able to push through and figure it out. Thanks for sharing it!

[@user-ok9pn8ge5r]

Hey Chris. I am.having issue with my Circus. 8.0V is only 5.0-5.2 volts. Can you point me in a direction to start looking. (Game will play then displays and scoring stop working). Game will play till ball is lost

[@ChrisHiblerPinball]

That 8VDC is the DC offset voltage for the 6 digit displays. 5-5.2V is probably fine. But you can remedy this by rehabbing the PS per the PinWiki. The process replaces CR7, which tended to burn on OEM boards. I would however suspect that the MPU is simply dieing. Is it an OEM or aftermarket?

[@user-ok9pn8ge5r]

@ChrisHiblerPinball Hi Chris. I believe that is is original. Thanks. I will check out the wiki.