(Topic ID: 258863)

Black Knight - Intermittent Matrix Issue

By PeteBlackwell

4 years ago



Topic Stats

  • 4 posts
  • 2 Pinsiders participating
  • Latest reply 4 years ago by slochar
  • No one calls this topic a favorite

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#1 4 years ago

1)Having an intermittent matrix problem. I can turn the pin on, and it fine for a while with no play, but suddenly the outhole cycles continually. In the switch diagnostic it shows the entire row with the outhole closed, but that is false. The machine will play fine sometime for a while, but then it happens again. The board seems to test fine (only one switch triggering on each pin sequence), and the outhole switch is fine. I understand it could be a short, or a bad diode, but the intermittent part is throwing me off. I'll start to try to determine what is wrong, and without touching anything it will start working again. I didn't think a bad diode or short would cause an intermittent issue, especially when no play is happening. Ideas?

2) If a diode is bad on one of the leaf switches, what's the replacement diode? IN4001?

Thanks much!

#2 4 years ago
Quoted from PeteBlackwell:

1)Having an intermittent matrix problem. I can turn the pin on, and it fine for a while with no play, but suddenly the outhole cycles continually. In the switch diagnostic it shows the entire row with the outhole closed, but that is false. The machine will play fine sometime for a while, but then it happens again. The board seems to test fine (only one switch triggering on each pin sequence), and the outhole switch is fine. I understand it could be a short, or a bad diode, but the intermittent part is throwing me off. I'll start to try to determine what is wrong, and without touching anything it will start working again. I didn't think a bad diode or short would cause an intermittent issue, especially when no play is happening. Ideas?
2) If a diode is bad on one of the leaf switches, what's the replacement diode? IN4001?
Thanks much!

Enter the switch test when it happens and then disconnect the coin door. See if the error clears. Very common for mangled coin switches to short out an entire row.

#3 4 years ago

slochar,

I think your advice helped. This is my first pin, so greatly appreciate the help. There were some wires in the door that were stripped of insulation and bent, so I covered them with electrical tape and now, so far, I can't get it to fail. If it does fail, I'll disconnect the door and see if that resolves it.

Just in case I have I diode issue on one of the switches later, do you know if the diode is a IN4001 or IN4004?

Again, THANKS MUCH!!!!
Pete

#4 4 years ago

either diode will work.

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