Re: Sony Black Trinitron 24" with weird colour (pink)

peter wrote:
"Edu" <edugimeno@xxxxxxxxxxx> wrote in message
news:1154939997.021557.241370@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Hello!
I have a problem with a TV set.
The images are primarily pink. I have checked there is not green
colour, except for the black and shadow areas. I mean: In a RGB
pattern, red shows good, blue shows good, but green doesn't show, but,
all the black areas appear green. Also, when selecting another channel,
the short interval when the screen should be black in the mean, it is
green...

First let's get the color straight. The opposite of green is magenta, not
pink.

yes, but the OP does have some green output, hence its pink.


Without testing it I'd say its more likely a video drive problem, but
it might well be a crt fault. Its not falling crt emission, if it were
just that you wouldnt be getting green retrace lines. I'd measure the
voltages on all the non-EHT tube electrodes to see how the green
voltages compare to the other 2 colours. Also I'd measure the amount of
green drive vs red and blue. Tjis should tell you whether the prolem is
crt or video drive or other electrode voltages.

If the fault is the crt, you might be able to burn off an internal
short, if not its well & truly had it.

If the fault is video drive, thats usualy fixable but not in every
case.

If its other tube electrode voltages, thats the easiest to sort out.

There is also the final possibility of very low green emission plus
someone has unably tried to tweak the drive/background to comppensate
and has screwed those settings up. In this case the set would have very
slowly got pinker and pinker over time, so you should usually know if
is this or not. Low emission is easy to fix on most sets if you know a
bit about electronics.

If youre not familiar with the dangers inside tv sets, learn first or
leave them alone. TVs and microwaves are the 2 household appliances you
really should not mess with unless youre upto speed.


NT

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