(Topic ID: 240866)

Flash Gordon transformer


By greenacarina

6 months ago



Topic Stats

  • 9 posts
  • 5 Pinsiders participating
  • Latest reply 6 months ago by greenacarina
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#1 6 months ago

Howdy!
Trying to troubleshoot my Flash Gordon strobe light.
There is a small transformer which appears to supply power to the strobe board. I have 110 vac going in, but 0 coming out.
Assuming i need a new transformer??
But, before i just blindly replace it...
After doing some reading, my understanding is that strobe board needs 110 v...so why the transformer??

Thanks
Chris

#2 6 months ago

The transformer is necessary because the game could be wired for different line voltages.

Have you verified fuse F1 is good?

#3 6 months ago

Fuse is good.
So...since i am lucky enough to have US power, any reason not to eliminate the transformer and just run 110v straight to the strobe board?

#4 6 months ago

I have a feeling that transformer is also there for isolation so the strobe doesn't introduce noise back into your mains supply.

#5 6 months ago

Isn't that all filtered out through the rectifiers and that big cap on the solenoid driver board?

#6 6 months ago
Quoted from greenacarina:

Isn't that all filtered out through the rectifiers and that big cap on the solenoid driver board?

The trigger voltage on the xenon strobe lamp can be a few kilovolts and ignition draws high current. It will generate unwanted EMI which you don't interfering with the game and other household devices.
The rectifier board and big cap on the SDB are not there to filter voltage spikes.

Inspect that transformer, it's likely the winding has broken from one of the lugs - remove some of the paper covering if you need to get a better look.

Consider why Bally would add the expense of an extra 1 to 1 transformer on machines destined for the local market only. There must be a reason.

#7 6 months ago
Quoted from Quench:

Consider why Bally would add the expense of an extra 1 to 1 transformer on machines destined for the local market only. There must be a reason.

Because purchasing got a closeout special on isolation transformers?

Actually, Isolation transformers were used on Flash G(not Xenon, typo), and Firepower for the florescent tube. At the time it was a UL requirement. With the Isolation there is no physical path to ground and it minimizes the electrocution hazard of having 110v AC on the backbox.

#8 6 months ago
Quoted from BigAl56:

With the Isolation there is no physical path to ground and it minimizes the electrocution hazard of having 110v AC on the backbox.

Bingo...that is why operating rooms use isolation transformers for all the power in the room. No way to ground the patient. Go back 50-60 years ago, it was a different (unsafe) story. And no, Ralph Nader didn't figure this out.

#9 6 months ago

Good info guys. Thanks!
I will check under the paper on this thing.
If it turns out to be bad, who sells a replacement?

Thanks
Chris

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