TV Dropped - Picture Discoloured - Repair Possible?

J

J

Guest
TV got dropped about 1ft onto a carpet. Now the picture is discoloured,
especially on the left and right sides of the screen.

Can it be repaired? Will it go away on its own? Is there an easy way to fix
it? I know I can fix a similar appearance that sometimes occurs on my PC
monitor by using the degauss facility...

Thanks

J
 
Sorry the news isn't too good.
TV's have a degaus circuit as well, but it is usually activated
automatically on first start up. if you don't hear the usual thump of the
degaus coils kick in briefly when you start the set from cold, the problem
might be that the degaus circuit is damaged although such damage is unlikely
in a fall such as you describe. I'm afraid a more likely possibility is that
the shadow mask has been dislodged from its critical position and if this is
the case only a new CRT will fix it.
Best bet is have a tech look at it and decide then if a repair is an option.
Best of luck,
Pete



"J" <ukbloke28@hotmail.com> wrote in message
news:bpok68$oge$1@sparta.btinternet.com...
TV got dropped about 1ft onto a carpet. Now the picture is discoloured,
especially on the left and right sides of the screen.

Can it be repaired? Will it go away on its own? Is there an easy way to
fix
it? I know I can fix a similar appearance that sometimes occurs on my PC
monitor by using the degauss facility...

Thanks

J
Click to expand...
 
How big was the set anyway? I've seen smaller sets that were dropped several
feet, with no damage to the CRTs (though the boards usually break in half).

It's also possible, that the fall may have dislodged the yoke and /or
convergence rings, on the nect of the CRT. Any competent tech should be able
to fix that easily.

Pete Culf <hackamat@hotmail.com> wrote in message
news:bpoodc$vdt$1@newsg1.svr.pol.co.uk...
Sorry the news isn't too good.
TV's have a degaus circuit as well, but it is usually activated
automatically on first start up. if you don't hear the usual thump of the
degaus coils kick in briefly when you start the set from cold, the problem
might be that the degaus circuit is damaged although such damage is
unlikely
in a fall such as you describe. I'm afraid a more likely possibility is
that
the shadow mask has been dislodged from its critical position and if this
is
the case only a new CRT will fix it.
Best bet is have a tech look at it and decide then if a repair is an
option.
Best of luck,
Pete



"J" <ukbloke28@hotmail.com> wrote in message
news:bpok68$oge$1@sparta.btinternet.com...
TV got dropped about 1ft onto a carpet. Now the picture is discoloured,
especially on the left and right sides of the screen.

Can it be repaired? Will it go away on its own? Is there an easy way to
fix
it? I know I can fix a similar appearance that sometimes occurs on my PC
monitor by using the degauss facility...

Thanks

J
Click to expand...
 
It may be remotely possible that the yoke got displaced, but unlikely. I
would put my bet that the CRT mask is damaged. I have seen this on sets
that were moved, and bumped a bit too hard.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


"J" <ukbloke28@hotmail.com> wrote in message
news:bpok68$oge$1@sparta.btinternet.com...
TV got dropped about 1ft onto a carpet. Now the picture is discoloured,
especially on the left and right sides of the screen.

Can it be repaired? Will it go away on its own? Is there an easy way to fix
it? I know I can fix a similar appearance that sometimes occurs on my PC
monitor by using the degauss facility...

Thanks

J
 
MarkC wrote:

try demagnetizing it. I've had a few that were damaged in shipping &
also had bad color purity but a simple demagnetizing took care of the
problem. Most likely though the shadow mask shifted when it was dropped
which unfortunately is unrepairable. Maybe you can get lucky & find a
repair shop with cheap used CRT
Click to expand...
I always thought the problem was if the shadow mask was deformed.
It seems like if it just shifted intact that wouldn't be a big deal.

--
After being targeted with gigabytes of trash by the "SWEN" worm, I have
concluded we must conceal our e-mail address. Our true address is the
mirror image of what you see before the "@" symbol. It's a shame such
steps are necessary. ...Charlie
 
try demagnetizing it. I've had a few that were damaged in shipping &
also had bad color purity but a simple demagnetizing took care of the
problem. Most likely though the shadow mask shifted when it was dropped
which unfortunately is unrepairable. Maybe you can get lucky & find a
repair shop with cheap used CRT
 
CJT <abujlehc@prodigy.net> writes:

I always thought the problem was if the shadow mask was deformed.
It seems like if it just shifted intact that wouldn't be a big deal.
Click to expand...
It has to both be precisely positioned in XYZ AND undistorted. Either
will mess up color purity.

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the Feedback Form at repairfaq.org. Thanks.
 
CJT <abujlehc@prodigy.net> wrote in message news:<3FC047D4.4040400@prodigy.net>...
MarkC wrote:

try demagnetizing it. I've had a few that were damaged in shipping &
also had bad color purity but a simple demagnetizing took care of the
problem. Most likely though the shadow mask shifted when it was dropped
which unfortunately is unrepairable. Maybe you can get lucky & find a
repair shop with cheap used CRT





I always thought the problem was if the shadow mask was deformed.
It seems like if it just shifted intact that wouldn't be a big deal.
Click to expand...

Saw this once on a "hotel" TV. Symptoms :- the distortions moved when
you walked towards it on a wooden floor- that was the giveaway. The
tube "rattled" when the set was shaken with a dull thudding.

-A
 
Reminds me of a 19" set I had a while ago. Couldn't get the purity straight
for the life of me, it was always bad either on the top or bottom half of
the screen. Then I noticed that the purity shifted whenever I tilted the set
back or forth, and the yoke etc was perfectly tight. Into the trash it
went.......

Andre <testing_h@yahoo.com> wrote in message
news:2c2cf14c.0311230645.1836396d@posting.google.com...
CJT <abujlehc@prodigy.net> wrote in message
news:<3FC047D4.4040400@prodigy.net>...
MarkC wrote:

try demagnetizing it. I've had a few that were damaged in shipping &
also had bad color purity but a simple demagnetizing took care of the
problem. Most likely though the shadow mask shifted when it was
dropped
which unfortunately is unrepairable. Maybe you can get lucky & find a
repair shop with cheap used CRT





I always thought the problem was if the shadow mask was deformed.
It seems like if it just shifted intact that wouldn't be a big deal.


Saw this once on a "hotel" TV. Symptoms :- the distortions moved when
you walked towards it on a wooden floor- that was the giveaway. The
tube "rattled" when the set was shaken with a dull thudding.

-A
Click to expand...
 
In article <bpok68$oge$1@sparta.btinternet.com>, ukbloke28@hotmail.com
says...
TV got dropped about 1ft onto a carpet. Now the picture is discoloured,
especially on the left and right sides of the screen.
Click to expand...
If you're lucky, the yoke has been bumped out of position
and can be corrected. If it hit hard enough to bend the
CRT elements out of line or shift the shadow mask, it is junk.
 
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