Volfied PCB problem

PCB problems and fixes
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mx5dob
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Volfied PCB problem

Post by mx5dob » September 20th, 2019, 3:10 pm

Hi all. Just picked up a Volfied PCB from Yahoo auctions. It's supposed to be working fine but I can't get anything on the screen. The sounds works ok, just no image.

I've measured the voltage at one of the chips and it's a steady 5.03v plus ive tried it on my supergun and no joy on that either.

Any ideas?
Paul

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geotrig
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Re: Volfied PCB problem

Post by geotrig » September 20th, 2019, 6:36 pm

Don't some Taito pcbs have issue with video ground but I suppose if it was that you would have something on the screen
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caius
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Re: Volfied PCB problem

Post by caius » October 2nd, 2019, 9:51 pm

The problem is obviously related to the 'TC0070RGB' modul,e most likely it got detached.But you already know this ;)

Awbacon
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Re: Volfied PCB problem

Post by Awbacon » October 6th, 2019, 4:24 pm

Have you checked continuity between chips and the video output area? Sounds like something clearly isn't 'moving"

Could be a cold joint somewhere that cracked during shipping

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dingsbums
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Re: Volfied PCB problem

Post by dingsbums » October 6th, 2019, 10:26 pm

Your Power Supply has - 5Volt ? Volfied needs it.

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