(Topic ID: 240934)

Buzzing Gottlieb Roto Unit


By flipit

6 months ago



Topic Stats

  • 8 posts
  • 4 Pinsiders participating
  • Latest reply 5 months ago by tengle93
  • No one calls this topic a favorite

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#1 6 months ago

Just finished a Domino and sometime when the roto unit activates there is a loud buzzing when the plunger is pulled in. Seems to be mostly when the ball exits the playfield and very rarely when the ball activates the roto in the kick outholes. I install a new coil sleeve and the plungers look brand to be in brand new condition? Any thoughts??

#3 6 months ago

Thanks, that was my next venture

#4 6 months ago

The exact same thing happens to my Domino when the ball has to get ejected a couple of times to make to the shooter lane. Seems as if a relay is staying energized to long.

#5 6 months ago

Yea, I know another person and he said his Domino buzzes occasionally when the roto spins. I've restored many games with roto units and have never run into this problem. Ive changed the plunger, coil stop, coil sleeve to no avail. In fact other plungers buzzed even more. Gonna run continuity and voltage drop test on the circuits. Maybe the coil is not getting enough juice, although the roto spins super fast!

#7 6 months ago

thanks

2 weeks later
#8 5 months ago

I know I 'm late to the party with this post but my Domino does the exact same thing!!

Maybe vic_camp could chime in on this, I know his Domino works perfectly.

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