TV out of focus on startup

I got an older TV. When I first turn it on, the picture is real
"fuzzy" (out of focus). Once it warms up (a minute or two), it is
fine.

I remember when the older tube type tv's would do that because of weak
tubes causing the high voltage to be lower than normal, but this is a
semiconductor tv. As far as I know, semiconductors either work, or
don't work. They dont get "weak". So why does this happen?

Mark

 

[Sofie]

maradcliff:
It sounds to me like an old, worn, weak CRT. Run it until it drops and buy
a new television.
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
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snipped;
< maradcliff@UNLISTED.com> wrote in message

I got an older TV.

When I first turn it on, the picture is real
"fuzzy" (out of focus). Once it warms up (a minute or two), it is
fine.

 

[Eric]

I heard if you connect the heater up to 12 Volts and run for 15 minutes,
then drop the supply down to 8 Volts and keep running for a further 5
Minutes, then turn the supply off,

Put the TV together and turn it on this would do great improvement.

When I first tried it, I was over the moon, it worked 'Bl**dy great"
But the next time I tried well forget it, I will be very reluctant to try it
again. I am confused why the customer did not complain.

I am not sure why I got so opposite results.




"Sofie" <sofie@olypen.com> wrote in message
news:vil6tt8rjb2lab@corp.supernews.com...
: maradcliff:
: It sounds to me like an old, worn, weak CRT. Run it until it drops and
buy
: a new television.
: --
: Best Regards,
: Daniel Sofie
: Electronics Supply & Repair
: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
:
: snipped;
: < maradcliff@UNLISTED.com> wrote in message
:
: > I got an older TV.
:
: > When I first turn it on, the picture is real
: > "fuzzy" (out of focus). Once it warms up (a minute or two), it is
: > fine.
:
: