Star Trek: The Next Generation
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Quoted from cody_chunn:If all looks OK, pull the connector for the self-test switches (see manual) and use a clip lead connected to ground to tap the header pin for ENTER. Be careful not to let the lead touch anything unintentionally.
Remove J205 and briefly jumper pin 9 to ground. This will emulate pressing the enter button and tell you if the problem is on the CPU or playfield wiring.
Quoted from CUJO:Tried what you said and the DMD message was to open the coin door to access the buttons so I guess the problem is in the wiring., not the CPU board.
Sounds like it since it responded to the jumper, but just to confirm try this with the coin door open.
Do the coin switches work?
Quoted from CUJO:The lights on the coin door get power thru that little PCB on the front left cabinet wall? Or thru a power harness?
I'm not that familiar with Stern, but that's what wizzardz stated above.
You only need to ground the wire momentarily. This simulates the press of the enter switch. Because you (in essence) held the switch down it scrolled through the audit menu. This is normal behavior and says the board is working.
Now short the org-gry wire at the coin door switch to ground (again momentarily). If that works then the ground wire that goes to the switches is open at some point.
Quoted from terryb:Now short the org-gry wire at the coin door switch to ground (again momentarily). If that works then the ground wire that goes to the switches is open at some point.
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Banning, CA