Re: Fuzzy TV picture
- From: bz <bz+ser@xxxxxxxxxxxxxxxxxxxx>
- Date: Sun, 13 May 2007 11:23:59 +0000 (UTC)
<wayne.marsh@xxxxxxxxx> wrote in message
news:1178986242.822754.181760@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi,
My parent's crappy JVC "InteriArt" TV has developed an annoying
problem where the picture becomes horribly fuzzy. The fuzziness
depends on the colours on the screen - if there is a blue background
it is incredibly fuzzy, but with colours approaching white it's almost
completely clear.
Could anybody suggest what is wrong with it, and if it could be
repaired easily?
Fuzzy indicates poor focus. Poor focus can be due to gas in the tube or to
the wrong voltages on elements of the picture tube.
Intermittently indicates that the voltage for some of the CRT voltages is
changing.
These voltages are normally regulated to prevent changes.
When the voltages change with CRT beam current (for one or more of the
beams), the problem could be with the CRT, with High voltage regulator,
with components used to adjust the CRT beam currents or with the low
voltage power supply.
If it is the CRT, it is not cheap. Most other problems should be fixable at
not too much cost.
--
bz 73 de N5BZ k
please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.
bz+ser@xxxxxxxxxxxxxxxxxxxx remove ch100-5 to avoid spam trap
.
- References:
- Fuzzy TV picture
- From: wayne . marsh
- Re: Fuzzy TV picture
- From: JANA
- Fuzzy TV picture
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