Got a Big Game i am trying to get going.
did a coil test and the wrong coils were firing and some not at all.
so repinned plugs on J4 on the soleniod driver board and
repinned J4 and J1 on the MPU
and now i only get odd numbers in the displays?
Got a Big Game i am trying to get going.
did a coil test and the wrong coils were firing and some not at all.
so repinned plugs on J4 on the soleniod driver board and
repinned J4 and J1 on the MPU
and now i only get odd numbers in the displays?
The least significant bit of the BCD 4 bit signal from the MPU to the displays is not getting to the displays.
This could be the PIA output, header pin, female connector, fractured wire...
Fish out your meter and buzz for continuity along the path.
--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/Contact ... for board repairs
http://www.PinWiki.com - The Place to go for Pinball Repair Info
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