(Topic ID: 220811)

Stargate Switch Problem

By 53erMax

4 years ago



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  • 6 posts
  • 4 Pinsiders participating
  • Latest reply 4 years ago by Benhurr
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#1 4 years ago

Hey, I just started working on my first Pin, a Gottlieb Stargate. The machine has not been in use for many years until it was recently moved to a new home.
After turning the game on it seemed like the left VUK would be activated every now and then while in attract-mode. While doing a quick test play I noticed that balls shot in the mentioned VUK wouldn't be ejected until the game started searching for them. When shot from the left Horus-target, a transporter award was never given and the ball would be stuck. It also got stuck there after starting a mode from the pyramid. Since the VUK itself is working as soon as the ball is being searched by the game I can imagine there may be a problem with the optical switch.
Another problem occurred on the right ramp which also never seemed to award anything.
Does anyone have any tips on how to fix these issues?

#2 4 years ago

Should be a switch test in there. Optos - clean, then check for bad solder joints. Switch on ramp, see if it works in test, then if it needs adjusting or broken wires at switch or at other switches with the same color wires.

LTG : )

#3 4 years ago
Quoted from LTG:

Should be a switch test in there. Optos - clean, then check for bad solder joints. Switch on ramp, see if it works in test, then if it needs adjusting or broken wires at switch or at other switches with the same color wires.
LTG : )

Thanks a lot for the quick answer - I will try my best tomorrow

#4 4 years ago

Test wires 1st then check transistor on A3 cause they might burn if you got ground issue.

You must shunt all ground wires near the tranformator as it is preconised on pinrepair.com for Gottlieb System 3

#5 4 years ago

As a matter of fact, I recently removed my entire VUK assembly, and can take some pictures of the way it is supposed to look. I can take more pictures of it with the little board removed too if needed.

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#6 4 years ago

Ok so if this diode doesn't work you might have a red diode shinning on diode board under the playfield at the bottom right.
Test wires...if there are good, plug the diode and film it with your phone when it's power on...you might see one of two shinning a little bit. If not diode are HS.

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