(Topic ID: 291902)

Bally XENON No 12 volts DC or 6.5 VAC @ Power board. Fuses blown

By StotzBotz

9 months ago



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  • 2 posts
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  • Latest reply 9 months ago by BigAl56
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    #1 9 months ago

    Hello friends. Been awhile since I found a pinball machine to work on. This XENON pinball machine did not come cheap to me but I thought I would get it going again. I purchased a new Rottendog solenoid driver / voltage regulator board for it because in the beginning I wasn't getting any action with the solenoids. Seemed like a good place to start but afterwards it seemed as though the display lights wouldn't light up or much of anything happen for that matter. After doing some checking I found the fuses blown for the 12 volts DC and the 6.5 VAC down on the power board. I did replace the 12 volt DC fuse only to have it blow again. I don't have a 20 amp fuse for the 6.5 VAC until Monday so I thought that I would reach out to you wonderful people for advice. Would anyone know the proper way to go about figuring out what's happening here or would this indicate a problem with the power board like bad voltage regulators. Just trying to do things right and not go through a bunch of fuses without fixing the problem first. Any help would be greatly appreciated. Can't wait to get this machine going again.

    #2 9 months ago

    First rule is to always start at the rectifier board before you start replacing boards. Buying new boards before you have done basic troubleshooting is an expensive risky proposition.
    I'm guessing F3, 4A fuse is what you are referring to. Where I would start is to unplug J1-4 on the rectifier and see if the fuse blows with no load. If it does it's most likely a bad diode, CR5-8 If not, pull out your meter and confirm the output is on TP3 is 12v (ish). If that passes. Unplug all the boards in the backbox except J3 on the SD board and start troubleshooting the 5v power supply.

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