Small problem with a 37" LCD TV..

S

Suzie Wong

Guest
Panasonic TV when used on Freeview


Shows small white lines at top of screen only on the left of screen and
only half way, sort of looks like the Teletext lines that can be seen on
normal TV's, But these are static



This is not all the time seems to be a scan height problem as the
picture is not really full screen.
 
Suzie Wong <swong@chinatown.cn> wrote in message
news:6n7p061sfqq0gcta6ke5a2kvrusl0qduvb@4ax.com...
Panasonic TV when used on Freeview


Shows small white lines at top of screen only on the left of screen and
only half way, sort of looks like the Teletext lines that can be seen on
normal TV's, But these are static



This is not all the time seems to be a scan height problem as the
picture is not really full screen.
Click to expand...
So how does it behave when trying it with a different set top box?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm
 
"N_Cook" <diverse@tcp.co.uk> wrote in message
news:hui7la$41o$1@news.eternal-september.org...
Suzie Wong <swong@chinatown.cn> wrote in message
news:6n7p061sfqq0gcta6ke5a2kvrusl0qduvb@4ax.com...



Panasonic TV when used on Freeview


Shows small white lines at top of screen only on the left of screen and
only half way, sort of looks like the Teletext lines that can be seen on
normal TV's, But these are static



This is not all the time seems to be a scan height problem as the
picture is not really full screen.







So how does it behave when trying it with a different set top box?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm
Click to expand...
Or with different 'forced' aspect ratios ? I have never seen any setting for
'height' in the CRT traditional sense.
It simply isn't a valid adjustment for a signal processed and stored
digitally for display on a digital LCD panel.

You can get some odd dots though on some channels. One particular mainstream
channel that I watch via Sky
satellite, displays a single white pixel at each corner of the plasma
display. That's a Pan, as well. No other channel does this ...

Arfa
 
On Mon, 07 Jun 2010 19:33:46 +1200, Suzie Wong
<swong@chinatown.cn>wrote:

Panasonic TV when used on Freeview


Shows small white lines at top of screen only on the left of screen and
only half way, sort of looks like the Teletext lines that can be seen on
normal TV's, But these are static



This is not all the time seems to be a scan height problem as the
picture is not really full screen.
Click to expand...
My guess it's not a problem with the TV.
 
On Mon, 7 Jun 2010 08:38:34 +0100, "N_Cook" <diverse@tcp.co.uk> wrote:

Suzie Wong <swong@chinatown.cn> wrote in message
news:6n7p061sfqq0gcta6ke5a2kvrusl0qduvb@4ax.com...



Panasonic TV when used on Freeview


Shows small white lines at top of screen only on the left of screen and
only half way, sort of looks like the Teletext lines that can be seen on
normal TV's, But these are static



This is not all the time seems to be a scan height problem as the
picture is not really full screen.







So how does it behave when trying it with a different set top box?
Click to expand...


It has a built in Tuner.

More or less fixed it by setting Overscan on.

But it seems that the Digital transmissions are leaving WSS in them,
Wide Screen Signaling and its not being fully blanked.

Here is what it looks like and this is from a Tuner Card seems to be a
bit common here..



http://www.gpforums.co.nz/showthread.php?threadid=371832
 
On Tue, 08 Jun 2010 17:27:30 +1200, Suzie Wong
<swong@chinatown.cn>wrote:

On Mon, 7 Jun 2010 08:38:34 +0100, "N_Cook" <diverse@tcp.co.uk> wrote:

Suzie Wong <swong@chinatown.cn> wrote in message
news:6n7p061sfqq0gcta6ke5a2kvrusl0qduvb@4ax.com...



Panasonic TV when used on Freeview


Shows small white lines at top of screen only on the left of screen and
only half way, sort of looks like the Teletext lines that can be seen on
normal TV's, But these are static



This is not all the time seems to be a scan height problem as the
picture is not really full screen.







So how does it behave when trying it with a different set top box?



It has a built in Tuner.

More or less fixed it by setting Overscan on.

But it seems that the Digital transmissions are leaving WSS in them,
Wide Screen Signaling and its not being fully blanked.

Here is what it looks like and this is from a Tuner Card seems to be a
bit common here..



http://www.gpforums.co.nz/showthread.php?threadid=371832
Click to expand...
There are a couple channels on Time Warner in north east Ohio
that exhibit the same unblanked signaling. I can adjust the position
of my HDTV screen so the lines are not visible.
 
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