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Panasonic banding problems......

Discussion in 'TVs' started by Ian182, Nov 16, 2004.

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  1. Ian182

    Ian182
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    Hi,

    Any Panasonic experts out there who can help with this ?
    I've got a Panny TX-32PL1, which suffers from horizonal banding on bright scenes. (NB - this is different to the NTSC banding problem that occurs with Pioneer DVD players).
    I've got a Sony DVD player and SKY+ connected, using a decent quality SCART lead (SQART RGB).
    The problem is only really noticeable on bright backgrounds - basically you can see thick "bands" which move up and down the screen. I've tried reducing the brightness and contrast, and while this improves it, it does not remove it completely.
    So, could it be :
    (1) - A fault on the TV itself,
    (2) - A cabling issue (I would have thought this unlikely, but......)
    (3) - Inteference from something,
    (4) - Something else that I haven't thought of ?

    Any help is much appreciated :)

    Ian.
     
  2. perta

    perta
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    Did you ever figure this out, Ian? I have the exact same TV and the same phenomenon in bright scenes (only in RGB, not in S-Video or Composite). I always thought it was my cheap little DVD-player (Radionette), but maybe it's the TV after all... If it is, there's not much point in buying a new player to fix it.

    Any comments would be much appreciated!

    Per Terje
     
  3. Ian182

    Ian182
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    Hi,

    In a word, no !!
    From reading various posts, it seems to be a widespread problem with Panasonic TV's.
    I've had it with both Pioneer and Sony DVD players, and its apparent on SKY+.
    You can minimise the problem by changing the brightness and contrast levels, but you don't seem to be able to get rid of it completely.

    Long term answer is probably to replace the TV (a Plasma would be nice :) ),
    but its a shame, because otherwise its a great TV.

    If anyone does come up with a solution, chip in !

    Ian.
     
  4. perta

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    Thanks, Ian. I find that turning the contrast to a minimum removes the banding (the brightness seems to have less significance). But I DO need some contrast... ;)

    The annoying thing is that this is only one of several "bad phenomena" I have discovered with this TV. I've been considering buying a new player for a long time, thinking it were to blame for them all. Can you also confirm the following?:

    1. Entire picture shifted slightly to the left when playing NTSC discs using RGB (very visible with centered menus, subtitles and on-screen titles and credits)?
    2. S-Video shows wavy patterns that move diagonally on backgrounds with strong colors? This comes and goes - sometimes entirely gone, and other times very visible.
    3. 4:3 mode with RGB sources causes a sharp green line down the left hand side, and also two wavy (curving towards the center) patterns from top to bottom of each side?

    It seems like the horizontal banding is the TV itself since so many different players show the same effect. But these other three may still be my dorky little player... The strange thing, though, is that none of these phenomena is reproducible on my parents' Philips TV. So I never had a problem with this player until buying the Panasonic.
     
  5. Ian182

    Ian182
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    Hiya Perta,

    I'll answer as best I can.........

    (1) Not noticed the picture shifting to the left, either with my current Sony player, or my previous Pioneer player. So that might well be a fault with your DVD player, but like you say, it works OK on your parents TV...... :confused:

    (2) I did notice a few wavy patterns via S-Video. When I had my Pioneer player, NTSC films were unwatchable via RGB because of thick black banding problems, so I had to watch them via S-Video. You immediately notice the drop in quality, and indeed, a few jagged lines here and there - very annoying.

    (3) Can't really comment on that one, as I ALWAYS leave the TV in 16:9 mode, no matter what I'm watching. I used to set it to Auto, but quickly got annoyed by it re-sizing the picture every few minutes !!

    Don't despair - from reading some threads on this forum, there are far worse TVs than the Pansonic out there ! :D

    Ian.
     
  6. perta

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    1. The picture-shifting is a strange thing. If I move from TV to DVD (AV1), I can see how the picture is correct at first. But after a split-second, it jumps to the left. This situation can be helped by going into the service menu and shifting the picture to the right. But of course this affects PAL as well, causing the picture to be too far to the right in that case...

    2. I actually find the S-Video picture to be just as good as the RGB picture, with the exception of the color-waves. There's also no banding with S-Video like with RGB, but the wavy patterns can get very strong and become very annoying.

    3. I want to watch 4:3 programmes in 4:3 mode (people look weird stretched out :)), except when I'm watching animation (always 16:9 for me). The 4:3 problem is only present with RGB sources, though. And I've also heard from other people that newer Panasonic TV's won't even allow one to select the 4:3 mode with RGB sources (as if it's a known problem that can't be helped).

    RGB seems like a strange creature on this TV... Whenever the mode changes from or to 4:3, it makes a clicking sound that you don't get on normal TV broadcasts or S-Video or composite.

    I'm thinking of buying a new player anyway, but am reluctant to buy the Pioneer DV-575A after your story (even though there may be no getting around it regardless of player). Do you know how the cheaper Denon players (1710 or 1910) do with this TV?
     
  7. jtf

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    i've got the 28pm1 and i've got this prob with rgb viewing as well but mine looks like tiger stripes either side of the screen. it's off to the engineers tommorow, fingers crossed
     
  8. Wayne Moule

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    Regarding S-Video.

    Have you tried disconnecting your RF lead and just have the Scart connected to see if this clears up any S-Video interference? After experimenting I found this to be the problem and now get a cracking S-Video picture.
     
  9. Ian182

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    I'll give that a try Wayne.........

    I tried removing the RF lead to see if it improved the RGB picture, but never thought of trying it to improve S-Video.

    Worth a try anyway :)

    Ian.
     
  10. Wayne Moule

    Wayne Moule
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    Yeah, I found an image of the analogue TV channel on my S-Video output until I unplugged the RF aerial lead.

    Or, make sure you tune to your RF channel of your DVD/VCR recorder first on the TV before you switch to a Scart channel.
     
  11. perta

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    Thanks for the tip, Wayne. I'm not sure what an "RF Lead" is exactly, but I'm assuming it's a regular cable connected to an antenna, right? My TV is connected to cable-TV, and disconnecting it had no effect.

    I wouldn't be surprised, though, if this effect IS caused by interference. It's like a large ripple moving diagonally over the entire screen - but only visible in areas of a smooth single color. If the whole screen is blue, you can see the ripple going diagonally down from the upper left to the lower right screen.

    The other areas may well be the player. I'll have to buy and try a new player to be sure I guess...

    Thanks for the tips, though!
     
  12. Wayne Moule

    Wayne Moule
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    RF (Radio Freqency) is the aerial lead to a TV, or/and from the VCR, DVD-RAM etc to the TV.

    What are your connections, Scart etc?

    Try and test the same brand DVD player with the TV.
     
  13. perta

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    I use a Scart cable for RGB (can't use it for S-Video for some reason - it only results in a composite signal), and a separate S-Video cable. I tried to disconnect every cable except the S-Video cable, but I still get the wavy effect... So it seems our effects are different.
     
  14. James M

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    I had exactly the same problem on a 32" JVC which I ended up taking back as I couldn't resolve the problem, hope you get it sorted
     
  15. jtf

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    only a bump for this thread. as i posted earlier my tv went off to the engineers and after they had it for 2 weeks they returned it today. they said after being on a soak test and that there were no faults with the tv, not happy!!!! hopefully when an engineer comes on monday he will open his eyes
     
  16. Ian182

    Ian182
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    Another thing I've noticed over the last week, which may or may not be related..........

    Lines which should appear straight on the right hand side of the screen now don't always do so.
    As examples, I've seen curvy walls (oo-er).........and some of the box-outs on episodes of 24 look very wavy. Its weird, because sometimes they're absolutely fine ?

    Its happening on both SKY and DVDs, so looks like the TV.

    Can anyone confirm what this problem is known as, and whether its fixable ?

    Ian. (fast talking himself into a Plasma) :)
     
  17. gothicform

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    just got one of these tvs too, also had the same banding problems, i found if i disconnected the rf lead from the back they went away with the dvd player, everytime i have to disconnect the aerial to watch a dvd, i cant say im impressed. i had no banding probs with the digi box though. the switching between av1 and av2 is also very very poor. it seems to automatically switch between them even if im watching the other av channel.
    a little off topic but ive been unable to tune channel 0 into the vcr meaning that i have three scart leads and only two scart sockets! any idea how to tune channel 0 into the vcr because ive tried and it just doesnt work.
     
  18. jtf

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    engineer finally came out to look at my tv. first he said he couldn't see any faults then admitted that he could see some slight banding. he then connected a sony dvd player to the tv which showed up no faults at all. looks like im off to take my pioneer 575 back. now all i have to do is find a replacement
     
  19. Ian182

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    Hiya JTF !

    If by "banding" you mean thick-ish black lines on NTSC material, then that
    is definitely a Pansonic/Pioneer problem. I should know, because I used
    to have the Pioneer 565, and had exactly the same fault !

    I solved that by replacing the 565 with a Sony NS930 - fanstastic DVD player, even better than the 565 in most respects.
    Its got rid of the black banding, but I do still notice banding on light backgrounds........but as this is on both SKY+ and DVD, it would appear to be a RGB problem on the Panasonic.

    There doesn't seem to be a fix for it, so I just live with it. The TV is fantastic in all other respects, and I only notice it rarely.

    Ian.
     
  20. dynamic turtle

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    If you want hassle-free RGB viewing, it seems one ought to avoid any combination of Sony and Panasonic TV's with Pioneer or Denon DVD's.

    Very annoying, as they more-or-less create the best products in their respective fields :(
     
  21. pwood

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    My mate had an old Toshiba which was fine with no banding on RGB then he got the Pioneer and ended up sending it back Due to banding. he then decided to get the Denon 2200 at great expense only to find the dreaded RGB banding yet again. Both Pioneer and Panasonic blamed incompatability issues!! He's given up and is using svideo which to be honest still looks great.
    TRY before you buy would be my advice.
     
  22. jtf

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    the problem was always there. it was a tiger stripe pattern. anyway took the pioneer back to richer sounds yesterday and swapped it over for toshiba 340 hooked it up with no probs at all. if anything i think i prefer the picuture from the 340 over the 575
     

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