Panasonic TX28PL10 picture 'ripple'

[rob n]

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?

 

[mansell]

all I can say is I don't get this on my TX32PB50

 

[mt50]

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

 

[atmoscinema]

Originally posted by mt50
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

Sounds like geomagnetic pull.

This should be able to be adjusted fom the service menu to some degree.

 

[mt50]

thanks, how do i access the service menu?

 

[LV426]

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.

 

[mt50]

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

 

[LV426]

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).

 

[mt50]

so i should ask for currys to take it back?

 

[LV426]

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.