(Topic ID: 175168)

who dunnit trough trouble


By freezie

2 years ago



Topic Stats

  • 6 posts
  • 2 Pinsiders participating
  • Latest reply 2 years ago by freezie
  • Topic is favorited by 1 Pinsider

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#1 2 years ago

I'm having an issue where the machine pops two balls on the playfield on startup. i went into the switch test and found whenever opto 4 or opto 1 get tripped it quickly registers opto 1 and flips to and stays reading opto 4 for on the test. i changed the sending and receiving optos for both boards on 1 and 4 out of desperation , not surprisingly it didn't help . i traced through the wires and dont see them pinched together anywhere . I'm needing a little direction on what to check next .

#2 2 years ago

Problem on the switch matrix, elsewhere ?

Did you work on the game before this started ? If so start there. If not, I'd look for things balls could hit and bend wires on a switch together.

LTG : )

#3 2 years ago

i was thinking the same , Lloyd , but opto 1 and 4 don't share a common link that i could see.

#4 2 years ago

So when I goto the opto pcb , I can just every switch and see it on the switch test , except for opto 1 and 4 . But when I plus the two plugs Into the opto board the switches make again . I'm thinking something it wrong with that opto board . Any ideas ?

#5 2 years ago

got some sockets and lm339n's on order . if that doesnt do it im not sure of my next move , everything else meters the same on the board .

#6 2 years ago

339's for the win !

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