(Topic ID: 257938)

4 Million Years BC

By Budski

4 years ago



Topic Stats

  • 5 posts
  • 3 Pinsiders participating
  • Latest reply 4 years ago by gilles89
  • Topic is favorited by 1 Pinsider

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#1 4 years ago

I am working through a 4 MYBC I bought a couple of years ago and just now getting to shopping it. I have all features working with the exception of the zipper flippers closing. When I manually close them the 100 relay in the backbox energizes and stays energized. If I isolate the contact on the zipper stack under the playfield you can play the game without them trying to move. By isolating the switch on the zipper flipper stack I can play the game. If I move the switch and relay in the cabinet base for the zipper flippers to close, it locks in and energizes the 100 scoring reel and will not de energize. This also happens on all 4 players. The bell mounted to the side of the backbox also is energized and stays energized. I don't have a schematic and I am also schematic handicapped but am learning. Any help would be appreciated.

#2 4 years ago

The close flippers target relay is remaining energized after the flippers close. Check that the close flippers solenoid end of stroke switch is opening when the flippers close.

#3 4 years ago

hi
you can get schemaic on ipdb
gilles

#4 4 years ago

Thanks everyone for the suggestions. I had replaced all fuses in the cabinet but didnt realize there was one just for the zipper flippers. Blow fuse, I wish all repairs were that easy.

#5 4 years ago

hi
it could be usefull to adjust mechanism for zipper
you find it in page 5 on dogies manual, also on ipdp.
the coil is difficult to obtain
gilles

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