![]() If you found this helpful and informative please share it. In that case raise the voltage up enough to a point that the display is stable again. On a rare occasion you may have a display that acts goofy when doing that. When everything is done and the board is back in, check the voltage again. Repaired early Bally display high voltage section. Mount it high as shown in the pic below for better air circulation and to prevent further burning of the board. When resistors fail, they go open so if it’s getting hot its resistance will only increase over time until it fails. You can also replace R51 which usually gets hot and burns the board. DETROIT, MICHIGAN FOR SALE PINBALL MACHINES Sally's Special Entry (One Ball). The Vidiot board is a special circuit board used to operate the video game portion and sounds of the hybrid games. CASH PAID for BALLY ENTRYS OR POST-WAR BALLY JOCKEY CLUBS Must be complete. You really don’t want to replace failed parts only to find they’ve blown again because of another bad part. Bally created two Hybrid video/pinball games, Granny and the Gators and Baby Pac-Man, which included a video game monitor and a pinball playfield. As I always say, “when in doubt, throw it out.” Just replace Q22 and Q23 if Q21 is bad. This is usually caused by Q23 (the round transistor with the little fins on it) going short.Īlso make sure to check Q22, typically it’s ok but in this case it was shorted as well. What happens is Q21 (the transistor on the small heat sink) goes short. Save yourself a bunch of trouble and check display voltage first. They did not use a lamp matrix like Williams. Early Bally pinball display voltage is too high and can’t be adjust down. Bally lamp issues are USUALLY pretty straight forward and easy to diagnose and fix because of how their lamps work. The displays seem to be able to take it, but who knows for how long. It can fail “working” and you won’t even know it which means the high voltage circuit isn’t regulating the +230v down to +190v, it’s just passing it through right to the displays. Bally AS-2518-22 Solenoid Driver PCB 105C Cap Kit. I forget to do this sometimes and end up having to take the board back out despite the displays working. Bally / Williams 5763-15820-06 Power Driver 105C Cap Kit W/ Filter Caps. When servicing your early Bally power driver board, always make sure to check the display output voltage *before* removing it for service. For those that have the Bally home model pinball machines like Fireball, Evel Knievel, Captain Fantastic, and Galaxy Ranger, there is now some repair.
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