(Topic ID: 228157)

ST:TNG Switch issue

By Xpinmonkey

5 years ago



Topic Stats

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

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#1 5 years ago

Hi Pinside,

I have a switch issue with ST:TNG and am hoping you can figure it out because I am out of ideas. The game constantly put balls in the shooter lane. After hours of troubleshooting i found that switches #32 (Under L. Gun Sw.2), #42 (Under L. Lock Sw. 3) and #82 (Rift) all don't work. They are all in the same row #2. All other switches I tested worked just fine including others in row 2. I tried a know good xmit opto (it works with another opto receiver) and and soldiered in a spare receive opto for switch #32 as that was the first switch I saw out so I decided to start there but it didn't make a difference. I re-seated all cables on the cpu board and opto board under the play field with no change. Any ideas on where to start looking?

Thanks,
Brent

#2 5 years ago

I've performed the switch matrix diagnostics at http://pinwiki.com/wiki/index.php?title=Williams_WPC#Switch_Matrix_Problems
No issues were found. Every individual switch turned on/off. I assume that means I can rule out the CPU board as the issue?

#4 5 years ago

Thanks Marc! I figured it out.

I did have 12 volts and I started tracing the wires on row 2. I found there was a loose wire on the "left bank middle" switch #52. There was very little soldier to begin with on that part of the switch, surprised it held together for as long as it did.

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