(Topic ID: 209392)

Medieval Madness GI light problem

By Johnwart

6 years ago



Topic Stats

  • 5 posts
  • 3 Pinsiders participating
  • Latest reply 6 years ago by Johnwart
  • No one calls this topic a favorite

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#1 6 years ago

Long story but I recently got my mm out of storage. Put in a shaker motor, fixed a few minor things, then noticed the middle GI string was out. Checked fuse, wiring etc. and problem seems to be on the board. My skills are a little weak here. Any suggestion on how to determine the bad part while leaving the board in the machine (I have no test jig) or what is the preferred method of determining the problem?

#2 6 years ago

Gi problems with wpc 95 power driver boards usually turn up a diode in that diode group lower left of the board. Check all those with a DVM.

#3 6 years ago

Did you pull the fuses or check them while still in the machine? Pull them and check.

1 week later
#4 6 years ago

I checked the fuse out of the board. It doesnt look right, there is a little blob in the middle of the link and it is slanted but it checks ok. I have ordered a new fuse anyway just in case.

#5 6 years ago

I have taken the board out of the machine and will try checking the diodes. An overall inspection does not reveal any problems. Thanks for the suggestion.

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