(Topic ID: 260770)

Power snafu


By seeburg220

4 months ago



Topic Stats

  • 9 posts
  • 5 Pinsiders participating
  • Latest reply 4 months ago by HowardR
  • Topic is favorited by 1 Pinsider

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#1 4 months ago

Bally Night Rider EM. I noticed the fuse was blown underneath the play field for the slingshots and pop bumpers. I turned off the game at the switch and removed the fuse and when I installed a new one, it sparked, even though the game was supposedly off. I then unplugged the game and put another fuse in and when I turned it on it immediately blew. So, what has gone wrong? Transformer, power switch, rectifier, what?

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#2 4 months ago

Most likely a bad rectifier. The spark from the turned off game probably came from a charged capacitor.

#3 4 months ago

Second question - the schematic shows a diode between the pop bumpers and the 5A fuse. I can't find it. Is it inline somewhere in the wiring harness? Perhaps it is missing.

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#4 4 months ago

Is there a diode at the coil lugs?

#5 4 months ago

The spark probably came from that 1-milli farad cap being charged and discharging through the fuse.

#6 4 months ago
Quoted from jeffc:

Is there a diode at the coil lugs?

Hey, you're right. There is one on one of the three pop bumpers. Are the other two bumpers supposed to have a diode, or is one enough for all three?

#7 4 months ago
Quoted from Peruman:

The spark probably came from that 1-milli farad cap being charged and discharging through the fuse.

Is there a way to test a capacitor? I was just going to replace it, along with the rectifier, but I'm having trouble finding an exact match on the cap.

#8 4 months ago
Quoted from seeburg220:

Is there a way to test a capacitor? I was just going to replace it, along with the rectifier, but I'm having trouble finding an exact match on the cap.

A really good multi-meter will have a cap measuring setting. Best way to measure the cap would be to disconnect it from the rest of the circuit. With that cap being a 200V electrical capacitor, unless you see burn marks or the package is deformed, it's probably OK.

#9 4 months ago
Quoted from seeburg220:

having trouble finding an exact match on the cap.

Higher voltage is OK

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