Have you done any testing to determine whether it is wiring or boards?
You're currently viewing posts by Pinsider herg.
Click here to go back to viewing the entire thread.
I would agree that your jumper tests indicate a harness problem rather than a board problem.
You can also measure DC voltage on each column. If it's working, you'll see about 3V. If it's shorted, you'll see about 18V.
Edit: Actually, after thinking about this overnight, Stern games cycle through the rows, so you can have multiple columns on at once. This means the voltage will depend on how many lamps in that column are on. The same DC voltage test applies, but the "good" voltage can vary between 0 and 18V, while a shorted column will stay 18V.
A tool I really like is the Siegecraft lamp matrix tester. It's inexpensive and let's you test the board with the harness disconnected very quickly.
They don't sell a SAM harness since it's only an 8x8 tester, and you would need a 8x10 to do Stern "right". I sent them information to let them know I use it with my Stern stuff. I built my own harness for Stern, Capcom, and even WPC GI.
For Stern, I left it unkeyed on the row connector so that I could shift it over for the extra 2 rows. You're welcome to borrow mine if you need it now. I could also help you build harnesses for other systems.
You're currently viewing posts by Pinsider herg.
Click here to go back to viewing the entire thread.
Wanna join the discussion? Please sign in to reply to this topic.
Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!
This page was printed from https://pinside.com/pinball/forum/topic/metallica-column-stuck-on?tu=herg and we tried optimising it for printing. Some page elements may have been deliberately hidden.
Scan the QR code on the left to jump to the URL this document was printed from.