I am seeing something across multiple classic Bally pins that makes me think it is an actual bug in the firmware. It has to do with the LATCH signals for the displays. Specifically the Credit/Match/Ball (CMB) display.
Tag Archives: pinball
Alltek Ultimate Solenoid Driver Board with only the +43 VDC LED lit
So I have a stand-alone Mata Hari headboard that is used for testing purposes.
I previously had a Alltek Ultimate Solenoid Driver Board (USDB) in it that was powering an Alltek MPU board. That USDB was pulled because it was needed for another purpose and I later received a new USDB as a replacement. However, after connecting this one up it only lit up its +43 VDC LED. (Actually, it also lit up its 180 VDC LED, but that has nothing to do with this post.)
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