Just over a year ago my friend brought me his Stern Meteor – it was DOA. I rebuilt the rectifier board with new bridge rectifiers and new header pins. I did a lot of work on the MPU including new header pins. Also new headers on the sound board and light driver board. I replaced all the crimp connectors. I rebuilt the flippers, drop targets and pop bumper. I cleaned and re-set all the switches. I didn’t touch the solenoid driver board (except one new transistor) because it was a new Rottendog board. The game played great.
About a year after he picked it up he said it would randomly re-boot in mid-game (usually when he hit the right flippers). I understand this is usually caused by the 5 volts falling too low. I asked him to bring the game back and I would check it out.
First I checked all the voltages. Everything checked OK including 5.7 volts at MPU TP5. I played it for a few days and it was fine – then suddenly the coils went out. I found the problem was a blown fuse under the playfield. I replaced the fuse but couldn’t find what make it blow. I played it for several more days (probably 50 games). It played fine but this evening while I was playing it re-booted mid game. I played a few more games and it was fine again.
My question is; has anyone had problems with Rottendog driver boards. Could the 5 volt regulator (LM1085) be going out or the C10 capacitor (10,000 uF)? Should I replace them with the same or is there something better? I don’t have any of those in my stock pile. But I do have a very nice (and rebuilt) Bally driver board. For some reason I just don’t trust that Rottendog board.