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Title: Wells K7500 - top half of screen is dark Post by: jconstanza 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?
Title: Re: Wells K7500 - top half of screen is dark Post by: a69mopar 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 Title: Re: Wells K7500 - top half of screen is dark Post by: a69mopar on December 05, 2008, 11:52:58 PM you can download manuals and schematics from
http://www.wellsgardner.com/service/ (http://www.wellsgardner.com/service/) Good luck, Wayne Title: Re: Wells K7500 - top half of screen is dark Post by: jconstanza 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.
Title: Re: Wells K7500 - top half of screen is dark Post by: a69mopar 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 |