(Topic ID: 151830)

Haunted House Switch Weirdness

By marl3y

5 years ago

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  • 9 posts
  • 3 Pinsiders participating
  • Latest reply 5 years ago by OzPaul
  • Topic is favorited by 1 Pinsider


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#1 5 years ago

My Haunted House can't seem to figure out where the ball is. Plays the wrong music on each of the three playfields, "drain ball" sounds when hitting targets... I suspected a switch problem, so I went through and tested each individually in the test menu. Incidentally I have a Ni-Wumpf board installed and for a couple I got a "Clean Switch" error. According to the manual this happens when more than one switch closes in a very short time frame. So with a contact cleaner I went though each and made sure the spacing was correct. This didn't solve the problem. Having recently experienced the problems bad or missing diodes can cause I decided to check each of the switch diodes. To my surprise I found three of them tested bad. They are associated with switches 00, 22 and 40, so across various rows and columns. This may sound like a crazy question, but is it plausible that all are in fact bad or could something else be causing them to test bad? Replacing them is easy, but I was surprised to find multiple testing bad. Thanks.

#3 5 years ago

Yeah, they all tested something like 0.270 or so in one orientation, but three of them tested 2.2 in the reverse instead of 0. Just seems weird to have so many test bad. Was gonna replace with 1N4148 unless that's a bad idea. The 1N270 germanium are not easy to find, and pricey.

#5 5 years ago

Thanks Chris, I think I'll canibalize the coin door switch diodes like you suggest.

#6 5 years ago

Not so fast. Thinking I needed three 1N270 diodes for the playfield switches I replaced three of the coin door switch diodes with 1N4004s. To make it easier to get to them I disconnected and removed the lower playfield. I had two 1N270s to replace on the lower playfiled, so I decided to try to take care of those while I had it out of the machine. Of course now when I test the diodes they are all good. The other "bad" diode was on the upper playfield, it still tested bad, that is in until I disconnected it from the wiring harness. So, disconnecting A1 P/J5 from the upper playfield and A9 P/J2 from the lower playfields results in all the previously "bad" diodes all testing now as good. Any ideas what could be going on here? Thanks again.

#8 5 years ago

Got it, but there's still got to be a problem someplace, right? I shouldn't be reading voltage in the wrong orientation, even in circuit. Maybe a board problem. I'll need to see what's on the other end of those connectors. Thoughts?

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