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(Topic ID: 229905)

WPT Switch Issue


By Manhattan

1 year ago



Topic Stats

  • 8 posts
  • 3 Pinsiders participating
  • Latest reply 1 year ago by YeOldPinPlayer
  • Topic is favorited by 1 Pinsider

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WPT Switch Matrix (resized).jpg

#1 1 year ago

My WPT recently stopped registering switches in the upper portion of the playfeild. It all went down at once during a game and has not come back.

Switches affected...
Both ball lock VUK's
Ace in the hole gates optos & switches
Both ramp optos and switches

Not sure where to start. Thanks in advance for any help...

#2 1 year ago

I'd start by looking at the switch matrix in your manual. How are all the switches related? Same row or column?

#3 1 year ago

Yes, thanks... All the switches are located on the fourth row...

WPT Switch Matrix (resized).jpg
#4 1 year ago

I would test other switches in that row. The green-yellow wire is probably broken at one of them. 50 or 51 seem likely suspects.

#5 1 year ago

Ok thx, I will look... So basically, all these switches are daisy chained on that row and I should be following green/yellow wire for breaks and connection issues? If there is a single break does it take out the entire row?

I was thinking that since the entire row is out it might lead to the main board area.

#6 1 year ago

yes. exactly. They go to each switch and back to the main board. You can meter out the wire with a DMM but first physically check each switch looking for broken pinched or bad wiring.
I have a WPT too so let me know if u need help.
Cheers

#7 1 year ago

And if there is a break it takes everything out down stream of that connecction.[Makes them not work] Easy to track down. No sweat.

#8 1 year ago
Quoted from Manhattan:

I was thinking that since the entire row is out it might lead to the main board area.

If EVERY switch in the row is out then you probably have the green-yellow wire pulled out of the connector at J1-pin 5. But could also be the drive transistor Q4 I suppose.
An excellent switch matrix troubleshooting guide is located at https://pinballrehab.com/1-articles/solid-state-repair/repair-guides/146-switch-matrix-theory-and-troubleshooting#row-failure
At the end of that article it describes how to disconnect your playfield and test the board. If your board tests good you know it's a broken wire somewhere.

I thought from reading your first post that the first couple of the row four switches were working.

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