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Sony KP44PX3U

Discussion in 'General TV Discussions Forum' started by LARBERTBLUE, Aug 24, 2004.

  1. LARBERTBLUE

    LARBERTBLUE
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    I recently purchased a Sony KP44PX3U (replacement for a LGRE40NZ60RB which was returned due to the picture quality not being the best) and have noticed over the last couple of weeks little problems with the set. The text on Sky Sports news giving a slight ghosting effect, watching football it looks as if the game is being played on Axminster's finest as opposed to grass but the worst is the light smearing across the screen from any light on display. Off the phone to Sony this morning and they suggested changing from Advanced Digital Setting back to normal in the setup menu which I do not think will have any effect whatsoever but I'll give it a shot. Has anyone else had these problems and is there any solution or is it a case of "characteristics" of the set or RPTV in general?
     
  2. zaphody

    zaphody
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  3. LARBERTBLUE

    LARBERTBLUE
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    Hi Zaphody,

    Thanks for the reply. I got home last night and tried changing the setting from ASM to DP and it didn't make that much of a difference but I tweaked a couple of the settings to :- Contrast 62 Brightness 52 Colour 40 Sharpness 17 and was amazed at the difference. Streaking is still there but not as noticeable and watching Chelsea last night the carpet didn't look that bad so I think I'll stick with it like this for the moment and see how it goes.

    Cheers

    :)
     
  4. zaphody

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    Hi,

    I've spent one week now browsing (and "googling") the web regarding the "streaking" problem. I've been to many national and international TV-Forums and found hundreds of users complaining about this problem. No matter, if they owned a Sony, a Thomson, a Hitachi etc. I've also spoken (phoned) to a dozen independent TV-Engineers, and EVERYBODY told me, that EVERY tube-based RPTV (CRT) has it.

    This occurs because of the high power, which is used/needed for the tubes to produce a bright and brilliant picture on a large screen. (On a small TV you won't notice it much, cause the tubes don't need to power that high, cause they only have to "fill" a small screen). They power the phosphor-screen, which leads to this streaking thing. Of course you can influence/reduce it by playing around with contrast/brightness and of course, the TV-Engineers can play around even more using the service modes/menus, but you will NEVER get completely rid of the problem "bright objects on dark backgorunds".

    I've accepted that now on my Sony KP-44PX3, cause I don't have an alternate:

    Plasma? Too expensive and has also many problems.
    LCD? Too expensive and produces often even more smearing/streaking
    DLP-RPVTs? They have the "rainbow effect" which drives me more mad than the tube-based problems.

    Cheers,
    Zaphod :hiya:
     
  5. ayrshiredude

    ayrshiredude
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    Ok so if that is the case how come I have never seen it on any other RPTV and I don't recall anyone else compaining about it in the forums about any other RPTV?
     
  6. runningback

    runningback
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    If i set the contrast of my Thomson KW613 to more than 60% it becomes visible, below 50% you can't see it with a pair of human eyes.

    I recommend a contrast setting of below 50% for every CRT based RPTV if only to prolongue the lifespan of the tubes, but i've noticed that if you tweak a little you can still have optimal PQ with contrast and brightness reasonably low.

    So yes the streaking is there, i can see it very well when i have white credits
    over a black background but it gets invisible with contrast settings below 50%.
     
  7. zaphody

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    "Runningback" has given you an answer already, but maybe you never looked enough (like I did) for this thing in this or other forums? Here's a very good example:

    http://www.avforums.com/frame.html?...s/showthread.php?t=114680&highlight=streaking

    and

    http://www.avforums.com/frame.html?...ms/showthread.php?t=41919&highlight=streaking

    and

    http://www.avforums.com/frame.html?...ms/showthread.php?t=19091&highlight=streaking

    and

    http://www.avforums.com/frame.html?...s/showthread.php?t=134274&highlight=streaking

    and

    http://www.avforums.com/frame.html?...s/showthread.php?t=136968&highlight=streaking

    and

    http://www.avforums.com/frame.html?...s/showthread.php?t=127434&highlight=streaking

    and



    http://www.hometheaterforum.com/htforum/showthread.php?s=&threadid=147061&highlight=bright+objects

    and

    http://www.hometheaterforum.com/htforum/showthread.php?s=&threadid=75636&highlight=bright+objects

    and

    http://www.hometheaterforum.com/htforum/showthread.php?s=&threadid=43883&highlight=bright+objects

    and

    http://www.hometheaterforum.com/htforum/showthread.php?s=&threadid=21883&highlight=bright+objects

    and

    http://www.avforums.com/frame.html?...howthread.php?t=91573&highlight=bright+object



    Do you need more examples? I can give you about 100s more :) All manufacturers included.

    Zaphod

    PS. as I'm German, I looked in German forums first and found there many other guys complaining, but these urls wouldn't be appropriate here, I guess :)
     
  8. natal

    natal
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    Hi guys !

    Well hopefully the software upgrade will make it less visable :)

    I'm gonna try LARBERTBLUE's settings, for the time being.

    /natal
     
  9. zaphody

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    Hi Natal,

    I wouldn't hope too much for it. According to all other threads I've listed above and according to all TV-Engineers I've spoken to, this is a HARDWARE thing, which could maybe reduced a bit by a software update, but you can never get rid of it completely. My "best settings" are: Contrast 55, Brightness 45 - then the streaking is almost gone!

    Another 2 questions I have:

    1. Did anybody of you also experince the problem, that when you use teletext and switch to some pages within teletext, that the TV freezes? (Freeze = you can't change channels anymore or adjust the volume, you have to power off the TV completely and turn it on again) Mine does, and this is something, which can really be fixed with a Software-Update. Unfortunately, I've been waiting for 14 days already for a service engineer. When I called him, he said: "I am waiting for the repair kit from Sony. Sony hasn't got enough for this model in Germany, so it might take 3 weeks until I can fix your TV". Really great, right?

    2. Is your screen completely tight to the box of your TV or has it some minor gaps at the edges, too? Mine has them, although the screen looks "tight", but I'm not sure...? Sorry, when my explanation sounds confused, but I can't describe it better...

    Zaphod
     
  10. ayrshiredude

    ayrshiredude
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    zaphody

    Interesting. Though I would argue that some of these are not the same thing, it would appear to be something that other screens also can show. But I have had 3 previous RPTVs and none of them shows this problem. Perhaps some screens are more prone to it than others.
     
  11. zaphody

    zaphody
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    Yes, of course. Every "high-powering" RPTV has it. The KP-44PX3 produces a great and brilliant picture because of it's "high powering" tubes. The bad side is of course the "streaking". But as I stated before, I can reduce it to a minimum by using the settings 50-55 for "contrast" and 45 for "brightness". And of course it's important to adjust the settings when watching in daylight or watching by night. For daylight I use 50 for "brightness", by night/dark room I use 45. (That's the reason, that many TVs have settings like "day mode" or "night mode", cause by night you won't need a high "brightness".

    Cheers,

    Zaphod

    PS. You don't experience the "freeze" when using teletext (as asked above)?
     
  12. natal

    natal
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    Hello !

    Despite which settings I use , the streaking is still there.I havent used the teletext that much,but I've never had a freeze yet.
     
  13. scooby do

    scooby do
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    Also consider removal of the front reflective screen as once this is removed you will find that the contast can be reduced further. I own a Sony KP 44 PS2 and do not get any noticible streaking, cannot comment on what my contrast is set on as I have tweaked the sub contrast setting in service menu so the setting is at half (incase anyone does a reset!) but is effectively much much lower as the sub contrast has been tweaked. Once the reflective front screen was removed I had to re visit engineers menu and knock quite a few points off sub contrast.
     

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