(Topic ID: 258178)

Strange Diner GI Issue

By DCWyld

3 months ago

Topic Stats

  • 8 posts
  • 5 Pinsiders participating
  • Latest reply 3 months ago by DCWyld
  • Topic is favorited by 1 Pinsider


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#1 3 months ago

So a Diner pin I picked up only has the right half of the GI working (Green, White-Green wires), the left side dark (Brown, White-Brown). There is a relay in the backbox but I swapped another relay out and that's not it. The B-WB lines has continuity all the way back to the backbox interconnect board (White-Brown) and to the aux power driver board (Brown). I'm not really sure how to test with multimeter to diagnose which board is my issue. I do have continuity on both lines so I know its not a connection issue. Any help would be much appreciated. Thx.

#2 3 months ago

I'd follow along with a meter set to AC. See where you have power and don't. Maybe a weak connection dropping voltage but passing continuity ?

LTG : )

#3 3 months ago

Because Im fairly new to the pinball diagnostics thing, how would you test the individual pins on the boards? Red lead to pin and black to ? Or a red to white-brown and black to brown? Not sure how to go about that. Thx.

#4 3 months ago
Quoted from DCWyld:

Not sure how to go about that.

Study up on it. AC you measure hot to common, not hot to ground.

LTG : )

#5 3 months ago

Are the GI connectors on the interconnect board in good shape and any signs of burns?Have you tried reseating those GI Connectors?
Also pull out the 4 fuses located next to the above connectors and test with meter

#6 3 months ago

You mentioned changing out relay for new. Good.

However, make sure that connector attaching to the relay is good in terms of its wiring being seated into the connector well.

Sometimes one of the wires pulls out of the connector ever so slightly. I’d turn game on and jiggle that connector carefully and see if gi flashes at all. Push on the wires inserting into that connector.

#7 3 months ago

J6 J7 J9 On tbe interconnect board , check those for burn up. Also pull the 4 fuses located next to the above connectors. and check them.

#8 3 months ago

Thank you all. After your help it looks like the 9 pin header at J6 at the interconnect board. Appreciate your help.

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