Mr. & Mrs. Pac-Man
Bally, 1982You're currently viewing posts by Pinsider Meteor_Rick.
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your High voltage regulator circuit might be bad and is in an overvoltage condition. stop trying. you might permanently damage the displays. do this to check: unplug the displays and measure the test points on the regulator/driver board. make sure your DVM is set to measure 300v range. TP4 should be 230vdc or so. TP2 is the output to the displays and should be no more than 190vdc. BE CAREFUL PROBING THIS CIRCUIT! THE VOLTAGE IN THIS AREA IS HIGH AND IT HURTS! Rick
OK good. Then make sure your display connectors are keyed correctly and not plugged in backwards. Been a long time, but theres something thats ringing a bell about the commas being on like that. Like maybe using Stern 7 digit displays or maybe 6 digit displays mixed in with the 7's. I dunno. its late and I cant think anymore! Will check on it tomorrow.. Good night and good luck. Rick
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Birmingham, AL