(Topic ID: 302903)

“Demolition Man - "Magnet Broken" Error

By Phoerber

2 years ago



Topic Stats

  • 6 posts
  • 2 Pinsiders participating
  • Latest reply 2 years ago by Phoerber
  • No one calls this topic a favorite

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#1 2 years ago

Hello All -

I finally landed a Demo Man after a long time searching. Had a bunch of issues, but I am finally down to the last one: The dreaded "magnet broken" error. Everything else with the Cryoclaw works fine in test, but the magnet actually seems like its dead. I have continuity from the Fliptronics II board to the magnet lugs and it appears to be getting power. However, the magnet will not energize/pick up the ball. The claw cycles left/right several times at power-up and finally gives up after a half dozen tries. Do magnets actually go bad? That would be a first for me! Thanks in advance for any insights! Pete in WA

#2 2 years ago

Disconnect the magnet (wires) and test the resistance across the two magnet wires. Should be at least 3 ohms. If it's open, the magnet is bad.

Magnets rarely go bad. Just a long piece of insulated wire. But it happens.

#3 2 years ago
Quoted from phishrace:

Disconnect the magnet (wires) and test the resistance across the two magnet wires. Should be at least 3 ohms. If it's open, the magnet is bad.
Magnets rarely go bad. Just a long piece of insulated wire. But it happens.

Thanks brother, on it now.

#4 2 years ago
Quoted from phishrace:

Disconnect the magnet (wires) and test the resistance across the two magnet wires. Should be at least 3 ohms. If it's open, the magnet is bad.
Magnets rarely go bad. Just a long piece of insulated wire. But it happens.

99.1 ohms, so not the magnet I take it?

#5 2 years ago
Quoted from Phoerber:

99.1 ohms, so not the magnet I take it?

I believe that's going to be too high of resistance. Should be somewhere between 3 - 20 ohms. If a new one is available, I'd try a new one.

#6 2 years ago

AM UPDATE: So this morning after checking continuity (board voltages being good) from the board to the magnet, for gits and shiggles I decided to throw a ball in the elevator cradle and fire the game back up. On the second pass, the magnet picked the ball up and dropped it at the completion of the left arm swing. The claw kept going though and after 6 passes, called it quits and threw the magnet broken credit dot. So, obviously its not the magnet, and whatever indicates the magnet is good isn't registering.

PM UPDATE: The ultimate culprit was the Elevator Hold opto pair. I took the elevator assy off (piece of cake/4 screws), with the hardest thing being getting the opto pair connector back down through the playfield. What made this quite bizarre was that particular opto switch was error'ing intermittently, and not knowing the logic of how the elevator worked made it less obvious for me than say someone who owned the game previously.

Bottom line, if you have a bad opto at SW. 74 (ELEVATOR HOLD) the game will throw a Magnet Broken error. Again: The magnet was fine, and now everything works as it should.

I also highly recommend re-flowing all the connections on the board at the bottom of the Elevator assembly. And while your at it, get rid of the Z connector.

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