(Topic ID: 329515)

Gottlieb King Rock Blows main fuse

By swampy

1 year ago



Topic Stats

  • 8 posts
  • 3 Pinsiders participating
  • Latest reply 1 year ago by swampy
  • Topic is favorited by 1 Pinsider

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#1 1 year ago

Hi Everyone. Gottlieb King Rock is the game. It's a 230V export version. Owner moved it from Lebanon to the UAE (same voltage between both countries) and now the machine blows the main line fuse on power up. History of the machine is unknown but I know the following:

Main line fuse was over-fused at 25A (!!!!) Replaced with 5A slow blow.
Other fuses also the incorrect ratings.
Line cord was old and only the 2-pin type. Replaced with 3 core and added ground connection to transformer. Ground braid to be added later.

Main line fuse still blows on power up and it also trips the circuit breaker at the house.

Since transformers rarely seem to fail I'm wondering if the wiring to it is suspect. Photos attached. Grateful if someone can check transformer wiring on a similar machine and let me know if this one looks right. Perhaps the transformer has failed? Photos attached showing wiring before and after new line cord installed.

I'm generally competent with pinball repairs but less so with EM's. Thanks all.

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#2 1 year ago

If you have an ohm meter, I would actually check that transformer. They rarely go bad...but yours looks suspect for some reason. If you have a separate 220 to 110 v tranformer, you can disconnect the 2-3 wire, then connect a 1-2 and 3-4. Then test at 115v to see if the 220v side is bad. That's alot of fumbling...I would just ohm check, and replace.

#3 1 year ago
Quoted from Fast400:

If you have an ohm meter, I would actually check that transformer. They rarely go bad...but yours looks suspect for some reason. If you have a separate 220 to 110 v tranformer, you can disconnect the 2-3 wire, then connect a 1-2 and 3-4. Then test at 115v to see if the 220v side is bad. That's alot of fumbling...I would just ohm check, and replace.

Many thanks for that. I will ohm check it as is and go from there.

#4 1 year ago
Quoted from Fast400:

If you have an ohm meter, I would actually check that transformer. They rarely go bad...but yours looks suspect for some reason. If you have a separate 220 to 110 v tranformer, you can disconnect the 2-3 wire, then connect a 1-2 and 3-4. Then test at 115v to see if the 220v side is bad. That's alot of fumbling...I would just ohm check, and replace.

Do you happen to have a good lead on finding a replacement transformer?

#5 1 year ago

You need a 220v one. Let me check...maybe I can find one.

#6 1 year ago

I know they rarley fail but Yeah, that transformer looks kind of black and toasty!

#7 1 year ago

Here's a few I found in France...
https://www.leboncoin.fr/recherche?text=gottlieb%20transformateur
I use google translate. The folks there seem pretty honest.

1 week later
#8 1 year ago
Quoted from Fast400:

Here's a few I found in France...
https://www.leboncoin.fr/recherche?text=gottlieb%20transformateur
I use google translate. The folks there seem pretty honest.

Thank you very much. Contacted someone on that site but no response after several days. So still on the search if anybody has a good lead.

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