Hitachi 43UWX10B "white/blue" ?

Discussion in 'Archived Threads 2001-2004' started by Christo, Sep 6, 2002.

  1. Christo

    Christo Agent

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    I am a proud owner of a Hitachi 43UWX10B
    However, I seem to have an issue with blue color around any white text or anything white on a dark backround for that matter. Example: if somone is wearing a tuxedo or similar, I can see a blue line where the white shirt meets the black jacket

    I also have what appears to be a burst of faint light surrounding any bright white also on a dark backround. Example: The load screen in SEGA GT 2002 is a white rotating tire on a completely black backround and there is almost like a large halo of faint white around the tire.

    I've run magic focus, did a manual convergence, tweaked the set with AVIA and those issues are still there.

    Does anyone have any ideas what I can do?
     
  2. Michael TLV

    Michael TLV THX Video Instructor/Calibrator

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    Greetings

    Maybe you need to do some m & E focusing ... too.

    Regards
     
  3. Christo

    Christo Agent

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    Michael

    I'm not sure what M&E focusing is?
     
  4. Michael TLV

    Michael TLV THX Video Instructor/Calibrator

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    Mechanical and electrostatic focus of the crt's

    Electronic focuses the beam correctly on the surface of the crt itself.

    Mechanical focuses the crt image projected to the screen surface.

    Regards
     
  5. Christo

    Christo Agent

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    Sounds like I need to call my local ISF specialist.

    What about installing Duvetyne? Would that reduce the "halo" effect?
     
  6. Michael TLV

    Michael TLV THX Video Instructor/Calibrator

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    Not really ...

    As long as the mirror is there, not much else you can do. Some think Duvy helps, I am not one of them, but no harm done if you try.

    Regards
     
  7. MichaelFusick

    MichaelFusick Second Unit

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    Michael TLV has a good start with Elec and Mech focus.

    I would also do a manual convergence, and verify that the blue convergence is perfectly converged with red and green.

    Other than that, it could be a result of the set slightly.

    Almost all Hitachi's (except the 43" sizes) use a first surface mirror. Yours does not. Could be internal reflections?

    good luck- MIKE
     
  8. Peter Hunt

    Peter Hunt Stunt Coordinator

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    Christo,

    Welcome to my world. I have a Hitachi 51UWX20B for the past month now and also get a slight blue halo effect on anything with a heavy black/white contrast. So text can have it or someone backlit causing a silouette. I didn't know if it was a defect, breaking in issue, or RPTV limitation.

    I called Hitachi and to my suprise they offered to have someone come in and look at it. I spoke to a tech and I didn't want to waste time having someone come out if it wasn't a defect. Upon speaking to the tech (not from Hitachi itself, authorized repair) he said that Hitachi's have a softer blue, all of them were like that. He still offered to take a look but I passed stating if someone was to take a look and tweak I'd rather after 100-200 hrs of breaking in.

    So I'm not really helping other then to say I have the same issues. Another issue I have is my Hitachi remembering certain settings. In the 4x3 viewing mode it defaults to grey bars. When I set it to be black it forgets once I turn off the TV, does yours do this?

    Peter
     
  9. MichaelFusick

    MichaelFusick Second Unit

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    Having a tech take a look is ok. There is no reason not to. Perhaps his settings might drift a little with time, but it would most likely be better still. There is no harm in having it checked out, or even adjusted. Blue focus is probably off a little, which he can fix easily. He might even manual converge it a bit and that should help tighten up the picture too.

    These are also things you can learn to do yourself if you chose. I would be happy to help you with it.

    -MIKE
     
  10. MichaelFusick

    MichaelFusick Second Unit

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    You could also try AVIA, Hometheater tune up, or VE, or THX optimode on many dvd discs.

    Put up a black background with white convergence grid. That should help you see the problem more clearly, give a better idea of the problem, and better describe so we can offer better solutions.

    Best luck- MIKE
     
  11. Peter Hunt

    Peter Hunt Stunt Coordinator

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    Thanks Mike,

    Yeah I have Avia and still havn't done a good calibration. Was waiting until the 100+ hrs mark and am probably passing the 200.

    The Hitachi sets do have a 117 point convergence grid that you can manually tweak. I wasn't able to improve on the "magic focus" (automated convergence) and havn't looked at in for a while.

    As far as describing don't know how much more to add. If you throw up a grid the red and green are fairly constrained, very sharp lines. The blue however is a soft blurred line in contrast. It halo's in all directions.

    Peter
     
  12. MichaelFusick

    MichaelFusick Second Unit

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    MichealTLV seems most correct..
    The Blue apears out of focus. It's and easy fix if your not affraid to use a screw driver.
    [​IMG]
    Basically just turn the blue focus knob in the picture, and thats "M focus" or manual focus that MichaelTLV was talking about. The service manual actually has a procedure for making blue slightly off focus, so it's sometimes ok for blue to be a little off. But "halos all the wasy around in all directions" is certainly off much too much.
    I would get a phillips screw driver, and remove the wooden pannel on the front of the set under the removable speaker grill, and then adjust the focus. Or, have the service tech come out and do it for you.
     
  13. Peter Hunt

    Peter Hunt Stunt Coordinator

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    Michael Fusick,

    Wow that almost seems too easy. Well since the TV is still under warranty and I wouldn't want to "void" it or anything, I think I'll try and get the techs to look at it first.

    thanks for attaching that image, what TV are we looking at anyway?
     
  14. RolandF

    RolandF Auditioning

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    I had a similar problem with my 51UWX20B. I contacted the dealer, who confirmed that Hitachi would send out an authorized rep. He was actually here last night, and did the adjustments.

    Mt convergence grid was very, very blurry, practically to the point of being unable to use it. Magic focus helped only slightly. The tech confirmed the set was way out of focus, and after having done the adjustments recommneded above, brought the convergence gridlines razor sharp. He did confirm that Hitachi recommends that the blue be left slightly "out-of-focus" for some reason. He also adjusted overscan, and went through the service mode convergence.

    The change was immediately noticeable on satellite channels, and even somewhat on dvd. Really glad I did it. Now to track down a service manual so I can do these sorts of things on my own down the road....

    RolandF
     
  15. RolandF

    RolandF Auditioning

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    PS: If you change the bars to black, the setting is supposed to revert back to gray the next time you power on the set.... this is stated in the manual. Apparently the gray bars are less susceptible to burn-in than the black bars.

    RolandF
     
  16. MichaelFusick

    MichaelFusick Second Unit

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    the picture is of the 53UWX10B....

    Isn't that what you have?

    They are all the same anyways...

    Your welcome- MIKE
     
  17. Stephen Houdek

    Stephen Houdek Second Unit

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    Ignore
     

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