(Topic ID: 49428)



7 years ago

Topic Stats

  • 14 posts
  • 6 Pinsiders participating
  • Latest reply 5 months ago by semicolin
  • Topic is favorited by 2 Pinsiders


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#1 7 years ago

Upon power-up, the mpu led flashes the 7 times, after the 7th flash the F3 fuse blows. Any help or ideas where to look will be appreciated. Thanks.

#4 7 years ago

The MPU, Solenoid driver, and Lamp driver, have all been recently replaced with new Alltech and Rottendog boards. As far as I know (owned for only 3 months) the sound boards are original, Bally-sound plus and vocalizer. I did unplug the input to the Sound plus board, same thing happened, but the playfield lights started to flash like normal before the fuse blew this time.

#6 7 years ago

did that, it only blows when the J3 plug is connected. All the voltages on the rectifier check right also.

#7 7 years ago

I have discovered, if I unplug J1 on the MPU board, it doesn't blow the fuse.

#9 7 years ago

YEP, still does it. They are Bally displays, appear to be original.

#10 7 years ago

Hey, thanks for the help Xenon75 and Barakandl. You guys got me headed in the direction enough that I found it. It is the aux lamp driver. After 9 fuses and a lot of trial and error, and reading the book and schematics, and following your leads! Wish I could find a 4amp circuit breaker! Kudos to pinside.

#12 7 years ago

Hey, thanks Molly, that was very interesting. Hope all yins are doin' ok in LA!

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