(Topic ID: 243639)

Tolerance for -12v on power supply board Williams System 11


By Noham

24 days ago



Topic Stats

  • 5 posts
  • 3 Pinsiders participating
  • Latest reply 22 days ago by Noham
  • No one calls this topic a favorite

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#1 24 days ago

I am having a sound problem on a Big Guns. I had the mpu professionally repaired and I am wondering if a power supply problem is causing my speech issue. The -12v on the power supply is testing at -15v. Everything else on the game works. Is -15v within tolerance?

#2 24 days ago

The -12V is unregulated, so without any significant load -15V is acceptable.

What kind of issues do you have with the speech?

#4 22 days ago
Quoted from Tuukka:

The -12V is unregulated, so without any significant load -15V is acceptable.
What kind of issues do you have with the speech?

I have music but no speech. Everything else seems to be working correctly.

#5 22 days ago
Quoted from pinballplusMN:

Is it a rottendog cpu?

It is the original mpu.

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