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Mitsubishi WS-A55 slightly blurry    
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PostPosted: Sun Sep 20, 2009 1:09 pm    Post subject: Mitsubishi WS-A55 slightly blurry Reply with quote

Mitsubishi WS-A55 CRT rear projection slightly blurry like out of focus
customer complained HD is not as good as before and worse during bright
picture. Convergence pattern looks good and CRT fluid is clean and mirror
and lenses are clean. Focus is crisp and adjustable with focus controls when
using the convergence pattern. Any help would be appreciated.

PostPost subject: Advertisement


PostPosted: Sun Sep 20, 2009 1:11 pm    Post subject: Reply with quote

algae growth in the blue and
green CRT fluid causes blurriness and then goes on to show how
to clean it and replace it:

Jesse Mack

Joined: 22 May 2008
Posts: 600
Location: The Last Frontier

PostPosted: Mon Sep 21, 2009 12:56 pm    Post subject: Reply with quote

If all is as you say, Clear fluid etc, note that there are two focus conditions.
Electronic and Optical.
With screen removed, look directly into the optics and adjust the G2 controls on all CRT's for optimum focus (good, distinct scan lines).
Reinstall screen.
Deliberately missadjust the convergence using the customer center-cross.
Either using a helper or tape a piece of typing paper on the screen on top of the center-cross of the customer convergence menu. From behind the set with the baffle shield removed adjust the optical focus by loosening the wing nut (do not remove the wing nut, just loosen) on each CRT and by turning the optics for optimum focus for that color. Retighten the wing nut. Readjust the center-cross.

This will be as good as it is going to get.

Hope this helps.

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