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Main => Monitor/Video Forum => Topic started by: tyson171 on August 02, 2010, 12:27:50 am

Title: wells gardner 25k7191 slight discoloration at the top?
Post by: tyson171 on August 02, 2010, 12:27:50 am
Okay, so i'm going to try to explain this as best as I can, but on my wells gardner 25k7191 at the very top of my screen my blacks/whichever color are actually faded across the entire top!?  The fade also improves/gets worse when I mess with the vsize, but never fully goes away? The fade pretty much takes a black color and turns it a dark grey, or a blue color and turns it a light blue?  I'm loosing anywhere between 1/4" to 1/2" of screen because of it! (if I adjust vsize to much it becomes unbearable, about 1.5 to 2 inch section of fade, but right now I have about a 1/4" section of fade)  It isn't HORRIBLE, and I can live with it, but if its an easy fix I would be more than happy to give it a try! Thanks!
Title: Re: wells gardner 25k7191 slight discoloration at the top?
Post by: qrz on August 02, 2010, 05:30:21 pm
if i'm looking at the correct print......http://www.wellsgardner.com/pdf/Schematics/K7000_25_27_inch.pdf (http://www.wellsgardner.com/pdf/Schematics/K7000_25_27_inch.pdf)
for starters , replace C57 ( 47uF/160v use 250 v  ) C204 4.7uF ( use 10uF @250v )
c48 ( 100uF/35v ) replace each with 105 degree rated caps .

and bear in mind there may be other 'lytics in need of replacement .....
Title: Re: wells gardner 25k7191 slight discoloration at the top?
Post by: tyson171 on August 02, 2010, 06:46:37 pm
So would a cap kit be a good idea?
Title: Re: wells gardner 25k7191 slight discoloration at the top?
Post by: qrz on August 02, 2010, 10:43:56 pm
i don't use the "shotgun" approach.
but, that may be best move for the home user .... so, yes