Data East GI issue LAH

(Topic ID: 192509)

Data East GI issue LAH


By martymart

1 year ago



Topic Stats

  • 5 posts
  • 2 Pinsiders participating
  • Latest reply 1 year ago by martymart
  • Topic is favorited by 1 Pinsider

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#1 1 year ago

I have recently purchased a Data East Last action Hero and there was an issue with the GI lighting not working. I replacd the connectors on the power supply and the PPB as well as new cable connectors. I also replaced a couple of the fuse holders. This did fix the problem although only until I started the game as this is when the globes go out (both on the back board and play field). During the game they do come on from time to time although only when they are cycling with the flashers. I have checked all of the cables and cannot see any issues and given they do come on I am guessing there is connectivity. I have installed new fuses in to this circuit and none of the have blown at this stage.

Does anyone know where I need to be looking as I am out of ideas and uncertain what I need to be checking next.

Thanks in advance.

#2 1 year ago

Try disconnecting CN7 from the power supply 3 pin with 2 wires. That will disable the GI relay. If the GI stays on during gameplay there may be a problem in that circuit. A coil drive on the mpu controls the relay. I think one wire from CN7 goes to CN12 on the mpu and one of the transisters nearby energizes the GI relay which will turn the GI off and turn GI on when deenergized. So maybe the transistor is bad causing the relay to turn on and turning the GI off. Does that make sense?

#3 1 year ago

Thanks. That does make sense. I will test that today to see if it stops the issue.

#4 1 year ago

Perfect this has located the issue. I will now change the transistor and see if this fixes the issue.

1 week later
#5 1 year ago

I finally got around to fixing this issue although all I did was re-seat the connector on the CPU board and it all worked again as it should. Thanks for your help mikat11 as I would not have even know where to look without your assistance.

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