Wonderboy problem

PCB problems and fixes
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Atomix
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Wonderboy problem

Post by Atomix » March 8th, 2020, 8:15 pm

I have this jamma that gives me this problem ..

I’m not espert...
The other jamma work ..
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DaveyD
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Re: Wonderboy problem

Post by DaveyD » March 8th, 2020, 8:26 pm

Has it ever worked for you? Looks like a sync issue?

Atomix
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Re: Wonderboy problem

Post by Atomix » March 8th, 2020, 8:38 pm

DaveyD wrote:
March 8th, 2020, 8:26 MP
Has it ever worked for you? Looks like a sync issue?

I bought it yesterday, as untested

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DaveyD
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Re: Wonderboy problem

Post by DaveyD » March 8th, 2020, 8:58 pm

On some bootlegs like that they don't share a connection between the main ground, and video ground.

This isn't a problem if the wiring in your cabinet joins those ground together. Looks like you are running it in a candy cabinet?

In my new astro city I had sync problem with a SF2 bootleg not syncing correctly as the wiring in this cabinet doesn't join the video and main ground. I ended up soldering a wire on the PCB between the video ground and main ground and it fixed the issue

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pubjoe
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Re: Wonderboy problem

Post by pubjoe » March 9th, 2020, 1:38 am

I also came across that recently. Holding a headphone lead to video ground and common ground quickly tested it.

Atomix
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Re: Wonderboy problem

Post by Atomix » March 11th, 2020, 8:12 am

thank you all

how can i take the test?
I'm a beginner

Should i Connect 2 pins ?
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pubjoe
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Re: Wonderboy problem

Post by pubjoe » March 11th, 2020, 9:24 am

Pin 1/2 and 14 (don’t slip)

8C71DD2C-0468-498D-94BB-10E5BA9EAEAC.jpeg
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Atomix
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Re: Wonderboy problem

Post by Atomix » March 12th, 2020, 9:59 pm

pubjoe wrote:
March 11th, 2020, 9:24 am
Pin 1/2 and 14 (don’t slip)


8C71DD2C-0468-498D-94BB-10E5BA9EAEAC.jpeg

5305EE03-D3D0-454C-9EEF-15BA8C0D3240.jpeg
Thank you
I will try it 8-)

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