Panasonic TX28PL10 picture 'ripple'

Discussion in 'General TV Discussions Forum' started by rob n, Oct 29, 2002.

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  1. Oct 29, 2002 at 11:05 AM
    rob n, Oct 29, 2002
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    rob n

    rob n
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    When watching in 4:3 mode the sides of the picture ripple when areas of the screen become bright,noe I know that most TV's do this to a greater or less extent but Panasonics seem to do it more than most.I've seen a 50hz Sony 28" which exhibits this but to a much lesser extent.Is it true for all Panasonic TV's?
     
    rob n, Oct 29, 2002
  2. Oct 29, 2002 at 1:01 PM
    mansell, Oct 29, 2002
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    mansell

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    all I can say is I don't get this on my TX32PB50
     
    mansell, Oct 29, 2002
  3. Dec 31, 2003 at 4:32 PM
    mt50, Dec 31, 2003
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    mt50

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    sorry to dig up an old topic but my tv is the same as yours and it does this all the time now it makes some programs look horrible and today i put my pc through it via s-video to watch a movie and in the top corners was about a 2-3 inch black gap which gets smaler towards the moddle and the bigger at the bottom of the screen, is there any way to fix this? we have had the tv for 12 months now, but have got a 3 or 5 year warrenty from currys
    any help wold be greatfull :)
     
    mt50, Dec 31, 2003
  4. Dec 31, 2003 at 10:36 PM
    atmoscinema, Dec 31, 2003
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    atmoscinema

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    Sounds like geomagnetic pull.

    This should be able to be adjusted fom the service menu to some degree.
     
    atmoscinema, Dec 31, 2003
  5. Jan 2, 2004 at 1:52 PM
    mt50, Jan 2, 2004
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    mt50

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    thanks, how do i access the service menu?
     
    mt50, Jan 2, 2004
  6. Jan 2, 2004 at 2:07 PM
    LV426, Jan 2, 2004
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    If the 'bowing' of the sides of the picture is more or less static, then it's a poor geometry issue, common in CRT sets. It is adjustable usually via service menu. I recommend (since you have a warranty) getting an engineer out - these things have the power to mess your TV up good and proper if used without sufficient knowledge. If you DO decide to DIY and can find out how - WRITE DOWN ABSOLUTELY EVERY SETTING BEFORE YOU CHANGE ANYTHING.

    If the bowing varies with brightness - then it is a voltage regulation issue which can't readily be fixed. But you can reduce the problem by reducing the brightness and contrast.
     
    LV426, Jan 2, 2004
  7. Jan 2, 2004 at 2:15 PM
    mt50, Jan 2, 2004
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    mt50

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    hi, when i watch sky sports news and they have got football high lights on in the background and the white box in the foreground you can see all of the outlines moving, and when any program has got a straight line in the pictur at the left or right end of the screen the line will be very wobbley and you can see it moving when the picture moves.
    do you think we should ring up currys?
    thanks
     
    mt50, Jan 2, 2004
  8. Jan 2, 2004 at 3:20 PM
    LV426, Jan 2, 2004
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    LV426

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    From your description, that sounds like voltage regulation bouncing - the width of the image varies according to how bright it is.

    It is a shortcoming of many CRT TVs - the components are actually not up to the job they have to do. A design 'fault' due to cost-cutting, and it isn't something that can usually be fixed by an engineer.

    Reduce the effect by reducing contrast.

    Or buy a flat panel (LCD or Plasma) which, unlike CRTs, don't suffer this particular artefact (although they have others of their own).
     
    LV426, Jan 2, 2004
  9. Jan 2, 2004 at 5:08 PM
    mt50, Jan 2, 2004
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    mt50

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    so i should ask for currys to take it back?
     
    mt50, Jan 2, 2004
  10. Jan 2, 2004 at 7:11 PM
    LV426, Jan 2, 2004
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    LV426

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    You can try it, but honestly I doubt you'll get any joy. As I say, all CRT TVs (with few exceptions - makes like Loewe) suffer this problem. Curry's engineer will tell you that it is normal or within tolerance etc....

    I'm going to say this just one more time:

    Reduce the effect by reducing contrast.
     
    LV426, Jan 2, 2004

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