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Another Rudy with various issues! First was the display. It wasn't working except for the faintest edge of a letter or number every so often. After some probing I found that the negative high voltage display rail was too low (~20v). No improvement after new caps and transistors. The fault was with R48 which was preventing this half of the regulator circuit turning on. With the circuit rebuilt the display was back in service.


Lamps were next. Lots of controlled (insert) lamps were dead. Mixture of new wedge globes and new sockets needed here. The playfield general illumination was also not working, while the backbox lamps were fine. The lamps themselves were all good, so the problem was on the driver board. The power input connector at J115 had been hacked up a bit with a small Molex connector used to replace a burned section. The crimps in this connector had failed, which cut off all power to the playfield GI. New crimps and the playfield was bright again.


Last, the lower left flipper was a bit weak, and sticking up sometimes. Two issues here. The first was a dirty and gummed up flipper mechanism. Once cleaned and resleeved, power was back. But the flipper would still stick up sometimes. The contact points on the high-current flipper switch contacts were sticking. New flipper switch went in and the sticking stopped.


A quick clean to finish up and Rudy was back to his old tricks!