The Horizontal Red Line

[Andrew Atkins]

To anyone who can advise

My son's Nokia 3724 UK FX portable television has recently stopped working.
Upon switching on there is no sound or picture but only a thin, red,
horizontal line in the centre of the screen. If anyone can advise what
component has failed then I would be most grateful.

Andrew Atkins
and...@enta.net

[Jeroen Stessen]

Andrew Atkins <and...@enta.net> wrote:
> If anyone can advise what component has failed then I would be most grateful.

Please visit http://www.repairfaq.org/ or post your question
in news:sci.electronics.repair where it finds a bigger audience.

Television repair is not a hobby, for continued safety you
should deal only with professional authorized repairmen.

Bye,
-- Jeroen.

[Laurence Taylor]

In article <7solqb$s4v$1...@news4.svr.pol.co.uk>
and...@enta.net "Andrew Atkins" writes:

-> To anyone who can advise
->
-> My son's Nokia 3724 UK FX portable television has recently stopped working.
-> Upon switching on there is no sound or picture but only a thin, red,
-> horizontal line in the centre of the screen. If anyone can advise what
-> component has failed then I would be most grateful.

Try the line scan coils, line output transistor, line output
transformer, line driver components, line oscillator, sync separator.

And if you're not totally confidant about poking around inside TV sets
when they're switched on, then don't bother - take it down the shop. Or
you could well electrocute yourself.

rgds
LAurence

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[Peter Harris]

Laurence Taylor <laur...@iapetus.demon.co.uk> wrote in article
<938561...@iapetus.demon.co.uk>...

> In article <7solqb$s4v$1...@news4.svr.pol.co.uk>
> and...@enta.net "Andrew Atkins" writes:
>
> -> To anyone who can advise
> ->
> -> My son's Nokia 3724 UK FX portable television has recently stopped
working.
> -> Upon switching on there is no sound or picture but only a thin, red,
> -> horizontal line in the centre of the screen. If anyone can advise
what
> -> component has failed then I would be most grateful.
>
> Try the line scan coils, line output transistor, line output
> transformer, line driver components, line oscillator, sync separator.
>
> And if you're not totally confidant about poking around inside TV sets
> when they're switched on, then don't bother - take it down the shop. Or
> you could well electrocute yourself.
>
> rgds
> LAurence

Hmm. Doesn't the line scan make the beam go across the screen, and the
vertical scan make it go up and down? So which one is bust and which one
still working?
--
Peter - my thoughts not necessarily those of......

[Laurence Taylor]

In article <01bf0bdf$ba65a7a0$652b...@pc-234866.wn.bbc.co.uk>
peter....@spamoff.bbc.co.uk "Peter Harris" writes:

-> > Try the line scan coils, line output transistor, line output
-> > transformer, line driver components, line oscillator, sync separator.
-> >
-> > And if you're not totally confidant about poking around inside TV sets
-> > when they're switched on, then don't bother - take it down the shop. Or
-> > you could well electrocute yourself.
-> >
-> Hmm. Doesn't the line scan make the beam go across the screen, and the
-> vertical scan make it go up and down? So which one is bust and which one
-> still working?

Oh, rats. Put it down to lack of caffiene, I mean sleep. Replace "line"
with "frame" in my reply! Probably the frame output chip has died.

(Currently playing on the radio, "Titles" by Barclay James Harvest.
Whatever happned to them?)