Faulty Colour TV

[Robert]

Does anyone have any suggestions regarding causes and solutions:

My fairly new Goodmans 32" Widescreen TV has recently developed a
fault with its colour output. Every so often the whole screen will
take on a yellowish-green tint which affects all channels and even the
channel display information. The problem is still noticable when I
turn down the colour settng to minimum.
I tried changing the output on my SKY receiver to RGB and this seemed
to work for a while but the problem has now re-surfaced. The only way
to reset the colour is the switch the set off and then on again.

 

[James Sweet]

"Robert" <robertwilson@mail.com> wrote in message
news:89fe06d0.0312180749.6a65183f@posting.google.com...

Does anyone have any suggestions regarding causes and solutions:

My fairly new Goodmans 32" Widescreen TV has recently developed a
fault with its colour output. Every so often the whole screen will
take on a yellowish-green tint which affects all channels and even the
channel display information. The problem is still noticable when I
turn down the colour settng to minimum.
I tried changing the output on my SKY receiver to RGB and this seemed
to work for a while but the problem has now re-surfaced. The only way
to reset the colour is the switch the set off and then on again.

When that happens do you lose red entirely? If so it could just be a bad
solder connection on the neck board.

 

[Robert]

I phoned my brother who suggested that I remove the scarts and blow
out any foreign particles that might be in there. It hasn't done it
since so I'm keeping my fingers crossed.

 

[Jerry Greenberg]

The set is loosing the blue channel. This can be anything from a cold
solder in the video path to a failing component. It may even be a bad
tube.

The basic way to see where the fault may be, is to see if a cold
solder connection can be traced down. While the fault is occuring,
check the supply and bias voltages to the elements of the electron
guns of the tube(s).

If the basic approach did not work, the best way to fix this is to
take the set appart, and when the fault happens to use a scope to
trace out the video path to see where the signal loss is. Depending on
the model, some extender jigs may be required to gain access to the
underside of the boards, and run them at the same time.

If you are not trained in TV service, and do not have access to the
proper test equipment, I would suggest you call an experienced service
tech to give you an estimate for repairs. This way you can make an
inteligent safe decision about sericing your set.

Jerry Greenberg
http://www.zoom-one.com

--


robertwilson@mail.com (Robert) wrote in message news:<89fe06d0.0312180749.6a65183f@posting.google.com>...

Does anyone have any suggestions regarding causes and solutions:

My fairly new Goodmans 32" Widescreen TV has recently developed a
fault with its colour output. Every so often the whole screen will
take on a yellowish-green tint which affects all channels and even the
channel display information. The problem is still noticable when I
turn down the colour settng to minimum.
I tried changing the output on my SKY receiver to RGB and this seemed
to work for a while but the problem has now re-surfaced. The only way
to reset the colour is the switch the set off and then on again.