TV picture distorted

[PE]

Hi all: My 15-yr old Toshiba 27" crt television has recently developed a
problem which is that approx 15 minutes after being turned on, the picture
bows inward on the left and right sides. Then, after a few more minutes,
the picture resolves and returns to normal and remains perfect for the
remaining time the tv is on. If the symptom described above means the crt
is wearing out, so be it, the set will soon be history. However, I'm
wondering whether some other, replaceable part, might be going bad and
causing the temporarily distorted picture.

Would appreciate any suggestions re. probable cause(s) of symptom described
above. Am basically novice, but handy and with soldering skills, and have
done a few simple tv repairs in the past. Thanks for your replies!

 

[Phil Allison]

"PE"

Hi all: My 15-yr old Toshiba 27" crt television has recently developed a
problem which is that approx 15 minutes after being turned on, the picture
bows inward on the left and right sides. Then, after a few more minutes,
the picture resolves and returns to normal and remains perfect for the
remaining time the tv is on. If the symptom described above means the crt
is wearing out, so be it, the set will soon be history. However, I'm
wondering whether some other, replaceable part, might be going bad and
causing the temporarily distorted picture.

Would appreciate any suggestions re. probable cause(s) of symptom
described above. Am basically novice, but handy and with soldering
skills, and have done a few simple tv repairs in the past.

** The symptoms suggest a cracked solder joint that is expanding as the temp
rises.

But you failed to mention how quickly the symptom arrives and leaves - so
it is not clear if my scenario applies.



..... Phil

 

[``ZACK``]

"PE" <ple@ix.netcom.com> wrote in message
news:_PednQsdJv8fOK7QnZ2dnUVZ_tOdnZ2d@earthlink.com...

Hi all: My 15-yr old Toshiba 27" crt television has recently developed a
problem which is that approx 15 minutes after being turned on, the picture
bows inward on the left and right sides. Then, after a few more minutes,
the picture resolves and returns to normal and remains perfect for the
remaining time the tv is on. If the symptom described above means the crt
is wearing out, so be it, the set will soon be history. However, I'm
wondering whether some other, replaceable part, might be going bad and
causing the temporarily distorted picture.

Would appreciate any suggestions re. probable cause(s) of symptom
described above. Am basically novice, but handy and with soldering
skills, and have done a few simple tv repairs in the past. Thanks for
your replies!
horizontal coupling cap

faulty yoke
or flyback tranformer circuit
pincushion transformer circuit
or try here
http://www.devileye.net/catalog/boiling_liquefied_gas/side_pincushion_correction_modulator_circuit.html

or
http://www.google.com.au/search?hl=en&client=firefox-a&hs=bCP&rls=org.mozilla:en-USfficial&channel=s&&sa=X&ei=0ugzTaTRA4K6vwPtzYmpCw&ved=0CBkQvwUoAQ&q=pincushion+transformer+circuit&spell=1

 

[hrhofmann@att.net]

On Jan 17, 1:10 am, "``ZACK``" <youwillfine...@home.com.au> wrote:

"PE" <p...@ix.netcom.com> wrote in message

news:_PednQsdJv8fOK7QnZ2dnUVZ_tOdnZ2d@earthlink.com...> Hi all:  My 15-yr old Toshiba 27" crt television has recently developed a
problem which is that approx 15 minutes after being turned on, the picture
bows inward on the left and right sides.  Then, after a few more minutes,
the picture resolves and returns to normal and remains perfect for the
remaining time the tv is on.  If the symptom described above means the crt
is wearing out, so be it, the set will soon be history.  However, I'm
wondering whether some other, replaceable part, might be going bad and
causing the temporarily distorted picture.

Would appreciate any suggestions re. probable cause(s) of symptom
described above.  Am basically novice, but handy and with soldering
skills, and have done a few simple tv repairs in the past.  Thanks for
your replies!

horizontal coupling cap
faulty yoke
or flyback tranformer circuit
pincushion transformer circuit
or try herehttp://www.devileye.net/catalog/boiling_liquefied_gas/side_pincushion...

orhttp://www.google.com.au/search?hl=en&client=firefox-a&hs=bCP&rls=org...

DIdn't you get enough relies on alt.home.repair????

 

[PE]

Why ask a question to which you obviously already know the answer? What's
your point?

<hrhofmann@att.net> wrote in message
news:0a9046ac-8c12-4177-ad07-e964ed085da3@t23g2000vby.googlegroups.com...

On Jan 17, 1:10 am, "``ZACK``" <youwillfine...@home.com.au> wrote:
"PE" <p...@ix.netcom.com> wrote in message

news:_PednQsdJv8fOK7QnZ2dnUVZ_tOdnZ2d@earthlink.com...> Hi all: My 15-yr
old Toshiba 27" crt television has recently developed a
problem which is that approx 15 minutes after being turned on, the
picture
bows inward on the left and right sides. Then, after a few more
minutes,
the picture resolves and returns to normal and remains perfect for the
remaining time the tv is on. If the symptom described above means the
crt
is wearing out, so be it, the set will soon be history. However, I'm
wondering whether some other, replaceable part, might be going bad and
causing the temporarily distorted picture.

Would appreciate any suggestions re. probable cause(s) of symptom
described above. Am basically novice, but handy and with soldering
skills, and have done a few simple tv repairs in the past. Thanks for
your replies!

horizontal coupling cap
faulty yoke
or flyback tranformer circuit
pincushion transformer circuit
or try
herehttp://www.devileye.net/catalog/boiling_liquefied_gas/side_pincushion...

orhttp://www.google.com.au/search?hl=en&client=firefox-a&hs=bCP&rls=org...

DIdn't you get enough relies on alt.home.repair????

 

[Phil Allison]

"PE"

Why ask a question to which you obviously already know the answer? What's
your point?

** The only questions really worth asking someone are ones where you * know
* what the answer is.

Think about it.....



...... Phil

 

[b]

On Jan 17, 3:11 am, "PE" <p...@ix.netcom.com> wrote:

Hi all:  My 15-yr old Toshiba 27" crt television has recently developed a
problem which is that approx 15 minutes after being turned on, the picture
bows inward on the left and right sides.  Then, after a few more minutes,
the picture resolves and returns to normal and remains perfect for the
remaining time the tv is on.  If the symptom described above means the crt
is wearing out, so be it, the set will soon be history.  However, I'm
wondering whether some other, replaceable part, might be going bad and
causing the temporarily distorted picture.

Would appreciate any suggestions re. probable cause(s) of symptom described
above.  Am basically novice, but handy and with soldering skills, and have
done a few simple tv repairs in the past.  Thanks for your replies!

resolder the connections of the coils in the E-W correction circuit,
common fault. Nothing to do with the tube. Do be aware of high
voltages in tvs, see the www.repairfaq.org before proceeding.
good luck
-B