(Topic ID: 138392)

VUK Opto Emitter looks on but doesn't register


By n1teowl

4 years ago



Topic Stats

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

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#1 4 years ago

I have a VUK opto that isn't working right. It always shows the beam as being blocked, even when it isn't. I tested the receiver opto with a flashlight and it seems to be working fine. I would assume that this means the emitter is bad, but I can see that it's on when I look at it. Two questions:

1) Does it matter if you can see a bright red light coming out of the emitter LED? Should it be only visible with a digital camera?
2) If you can see a bright red light, does that mean that the reciever should be picking up the signal?

#2 4 years ago

What game please ?

Stern and Williams are different.

LTG : )™

#3 4 years ago

It's a Sega Batman Forever.

#4 4 years ago

Should be glowing red both sides. Same part used both sides.

LTG : )™

#5 4 years ago

Do you have an idea what I should try next? The "dark" receiver seems to work fine when I shine a light on it, but nada when the red LED from the emitter board shines on it. Seems like it should work...

#6 4 years ago
Quoted from n1teowl:

The "dark" receiver seems

I'd replace it.

LTG : )™

#7 4 years ago

I'll give it a try. On a side note, what exactly does the VUK opto do, look for jams? It saw that it was unplugged today and it must have been that way since I got the machine. It seems to be functioning okay without it.

#8 4 years ago
Quoted from n1teowl:

what exactly does the VUK opto do

A ball goes into the VUK. The pinball machine goes "oh look, a ball went into the VUK". Then the machine being wiser now kicks the ball out of the VUK.

LTG : )™

#9 4 years ago

Yes, I get that. What I don't understand is why it kicks balls out despite the opto receiver being unplugged.

#10 4 years ago
Quoted from n1teowl:

What I don't understand is why it kicks balls out despite the opto receiver being unplugged

It thinks a ball is there and kicks.

No ball the opto switch is closed. Ball there blocking the opto the opto switch opens. No power - game thinks the switch is open.

LTG : )™

#11 4 years ago

When it's unplugged it doesn't kick until there is a ball in there. I assume it's because it knows it just released a ball into the VUK, not because the opto is telling it there is a ball in there. When I plug it in, I guess it starts receiving a signal and thinks the switch is open and starts kicking.

#12 4 years ago
Quoted from n1teowl:

When it's unplugged it doesn't kick until there is a ball in there.

What does it do in test ?

If the opto isn't working, the game doesn't know a ball is in there. After a bit it may go into ball search and kick that and other things.

LTG : )™

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