Question about Hitachi 50UX57B 50" Rear Projection Television

1 Answer

Hitachi 50ux22b has dark screen and general CQ adjustment issues

Hello
I have been given A hitachi 50ux22b Rear Projection TV.
The screen is dark and other Quality issues make me feel it is in need of Adjustments.
Does anyone have any logic board schematics or technical data identifing the adjustment areas on the main board?
Thanks in advance
Geoff
Progrsys@sbcglobal.net

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  • 2 more comments 
  • progrsys Jan 08, 2008

    No the convergence is not off.

    The picture is dark.

  • progrsys Jan 08, 2008

    I have adjusted

    Contrast to 5 clicks past half

    Brightness to 7 clicks past half

    All other settings at half

    All colors present.

    Picture is better.

    maybe thats all it needed...Thanks

  • progrsys Mar 02, 2008

    TV now clicks twice on power button press but no power light or power.

    Problem was correctable by moving chasis slightly but no more.I suspect a cold solder joint..somewhere.

    Thanks for your previous suggestions. Screen Quality was good before power problem.

  • shelties52 Feb 15, 2009

    picture very dark cannnot lighten up through contrast or brightness adjustments

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  • Master
  • 4,402 Answers

Is the convergence off?
bad convergence amp ic's
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Posted on Jan 07, 2008

  • Cary Farah
    Cary Farah Jan 08, 2008

    how dark is it? are you getting all three colors red, green blue?
    how far is your brightness turned up? thinking your blue tube might be shoot.

  • Cary Farah
    Cary Farah Mar 03, 2008

    I would look for cold solder joint around the convergence ic and any heat sinked transistors.

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