(Topic ID: 219770)

Metallica Lamp Column Stuck On

By knockerlover

5 years ago



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  • 8 posts
  • 2 Pinsiders participating
  • Latest reply 5 years ago by herg
  • No one calls this topic a favorite

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#3 5 years ago

Have you done any testing to determine whether it is wiring or boards?

2 months later
#5 5 years ago

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.

#8 5 years ago

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.

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