(Topic ID: 128387)

Data East Simpsons Center Pop Bumper not working


By cldavis2009

5 years ago



Topic Stats

  • 7 posts
  • 4 Pinsiders participating
  • Latest reply 5 years ago by robertmee
  • Topic is favorited by 3 Pinsiders

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#1 5 years ago

Good afternoon
I have a Data East simpsons that just had all the boards upgraded to Rottendog due to battery corrosion.
Everything works as it should except the center pop bumper, it was melted and not firing. I replaced it with a new coil/sleeve and it still does not fire?? It does make a sound as it should when the switch makes contact but will not fire the coil.
Any ideas?

Thank you in advance.

#2 5 years ago

Just to make sure, see if it works in coil test. If it does not then check if there is voltage to the coil. If that is good then check the connection to the driver board. If that's all good then either driver transistor or circuitry.

#3 5 years ago

Follow terry's good advice....Also a quick test to see if the coil is good, is with game powered on, take a length of wire and touch one end to ground braid in the bottom of the cabinet and the other end to the NON-BANDED side of the diode on the coil. If the coil fires then the coil is good. If it doesn't then the coil is not good...Sometimes the small copper wire from the coil to the lug where you soldered your wire gets broken. I'm ALSO ASSUMING that when you replaced the coil you oriented it correctly with the non-banded side of the diode connected to the ground wire from the board and the banded side of the diode connected to the power feed (likely from some other coil nearby).

#4 5 years ago

OK
the coil does not fire during the coil test.
the diode is on correctly as well.
I will test the coil tomorrow and follow the rest of your advice too..

Thank You
Ill post again tomorrow

#5 5 years ago

You also can set your meter to resistance, and measure the resistance across the coil lugs. It should be greater than about 2 ohms, but definitely not open or zero.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

#6 5 years ago

The coil fires when i ground it
traced the wires and they are connected correctly

#7 5 years ago

You can find the transistor for that coil on the driver board and ground the metal tab. See if the coil fires. If not, it's the transistor or the wiring between it and the coil.

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