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Author Topic: Wells K7500 - top half of screen is dark  (Read 6471 times)
jconstanza
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« on: December 05, 2008, 02:30:36 PM »
Working on a Wells Gardner K7500 that has the top half of the screen darker than the bottom. Tried swapping U601 (TDA1771) and U701 (LA7851), same thing. Am I looking in the right places?

* Wells 7500 top half dark.jpg (36.72 KB, 568x426 - viewed 358 times.)
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a69mopar
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« Reply #1 on: December 05, 2008, 11:42:24 PM »
Here is the troubleshooting and repair guide for it.  looks like a bit of vertical foldover??

VERTICAL FOLDOVER R618, U601, R303 TOP OR BOTTOM OF SCREEN
ADJUST VR907, VR903, VR902

Please keep us posted.

Thanks,
Wayne
* K7500 troubleshooting and repair.pdf (33 KB - downloaded 480 times.)
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a69mopar
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« Reply #2 on: December 05, 2008, 11:52:58 PM »
you can download manuals and schematics from
http://www.wellsgardner.com/service/

Good luck,
Wayne
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jconstanza
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« Reply #3 on: December 10, 2008, 05:38:06 PM »
Wow! I feel like an idiot. I got it like this from the customer. It had the wrong controller board.
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a69mopar
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« Reply #4 on: December 10, 2008, 07:26:58 PM »
Well it's good to hear you got it figured out.

Thanks for letting us know,
Wayne
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