Hi,
I have a friend who brought a second hand (About 2 years old) Samsung 42"
projection TV. It worked for 3 days and then a problem appeared.

Model no. SP42W5HFX
Next to that no. SP42W5HFX/XEU

Serial no. 3KPT716665H

The problem is as follows:- (I am no expert in the TV repair field!)

When you put a cross pattern on the TV you get green and
blue fine but red is miss-aligned in to top left hand corner.

I think it is one of two problem:

1.) The red crt has an issue in the picture alignment, looks a bit like a
magnet has been put close to the crt I guess it could be a problem with the
board connected to the neck of the tube or the coil that controls
electro-magnetically the picture on the red crt?

2.) I don't think this is the problem but, there is an auto convergence
board that lines up the 3 crt images this could also control the set up of
the picture in each or the crts??? Or could it be coursing this fault?

Like I said I am no expert!

Also,

I have read that if you have to change one crt then you should change them
all as since over time the brightness degrades, if the red is just replaced
then the colour will be un-balanced. Which I guess makes the TV a right off!

Is it worth trying to fix the original crt/board on neck?

I have had a look for tv parts on the internet but can't find much. Does
anyone know where I can get spares from?

Does anyone want to fix it, if it's more than about £150 it's not worth
fixing?

Can may understanding, if it dose'nt look right?

Does anyone know how to get the service menu (Just out of interest?)

Where can I get a copy of the service manual?

Any other ideas?

Many Thanks to anyone who can help, Jason

Change the convergence IC,s..

kip
"Jason Polychronopulos" wrote in message
news
Hi,
I have a friend who brought a second hand (About 2 years old) Samsung 42"
projection TV. It worked for 3 days and then a problem appeared.

Model no. SP42W5HFX
Next to that no. SP42W5HFX/XEU

Serial no. 3KPT716665H

The problem is as follows:- (I am no expert in the TV repair field!)

When you put a cross pattern on the TV you get green and
blue fine but red is miss-aligned in to top left hand corner.

I think it is one of two problem:

1.) The red crt has an issue in the picture alignment, looks a bit like a
magnet has been put close to the crt I guess it could be a problem with
the
board connected to the neck of the tube or the coil that controls
electro-magnetically the picture on the red crt?

2.) I don't think this is the problem but, there is an auto convergence
board that lines up the 3 crt images this could also control the set up of
the picture in each or the crts??? Or could it be coursing this fault?

Like I said I am no expert!

Also,

I have read that if you have to change one crt then you should change them
all as since over time the brightness degrades, if the red is just
replaced
then the colour will be un-balanced. Which I guess makes the TV a right
off!

Is it worth trying to fix the original crt/board on neck?

I have had a look for tv parts on the internet but can't find much. Does
anyone know where I can get spares from?

Does anyone want to fix it, if it's more than about £150 it's not worth
fixing?

Can may understanding, if it dose'nt look right?

Does anyone know how to get the service menu (Just out of interest?)

Where can I get a copy of the service manual?

Any other ideas?

Many Thanks to anyone who can help, Jason

On Wed, 7 Dec 2005 12:58:23 -0500, "kip" wrote:

Change the convergence IC,s..

Saw one (Samsung, not likely this model) a few years back that would
intermittently lose its convergence...after our first trip, on a
callback, we discovered that it had a transistor on the convergence
board (stand up, TO-92 (?, been away from this too long), metal tab,
no heat sink) that was close enough to a grounded part that it would
occasionally touch/arc, affecting the convergence. Once we bent it
forward a bit it stopped acting up. :-)

Tom


kip
"Jason Polychronopulos" wrote in message
news
Hi,
I have a friend who brought a second hand (About 2 years old) Samsung 42"
projection TV. It worked for 3 days and then a problem appeared.

Model no. SP42W5HFX
Next to that no. SP42W5HFX/XEU

Serial no. 3KPT716665H

The problem is as follows:- (I am no expert in the TV repair field!)

When you put a cross pattern on the TV you get green and
blue fine but red is miss-aligned in to top left hand corner.

I think it is one of two problem:

1.) The red crt has an issue in the picture alignment, looks a bit like a
magnet has been put close to the crt I guess it could be a problem with
the
board connected to the neck of the tube or the coil that controls
electro-magnetically the picture on the red crt?

2.) I don't think this is the problem but, there is an auto convergence
board that lines up the 3 crt images this could also control the set up of
the picture in each or the crts??? Or could it be coursing this fault?

Like I said I am no expert!

Also,

I have read that if you have to change one crt then you should change them
all as since over time the brightness degrades, if the red is just
replaced
then the colour will be un-balanced. Which I guess makes the TV a right
off!

Is it worth trying to fix the original crt/board on neck?

I have had a look for tv parts on the internet but can't find much. Does
anyone know where I can get spares from?

Does anyone want to fix it, if it's more than about £150 it's not worth
fixing?

Can may understanding, if it dose'nt look right?

Does anyone know how to get the service menu (Just out of interest?)

Where can I get a copy of the service manual?

Any other ideas?

Many Thanks to anyone who can help, Jason

Hi, Many thanks to both Kip and Tom for their replys.

I have not looked at the convergence board yet as it is shielded, but I take
it that the IC in question I should look at is fairly obvous?
What should I be looking for and what tests should I do?

If was was to replace the whole convergence board how much would one cost
and where could I get it from.


So you don't think it's a crt issue then?

Many Thanks, Jason





"Tom MacIntyre" wrote in message
...
On Wed, 7 Dec 2005 12:58:23 -0500, "kip" wrote:

Change the convergence IC,s..

Saw one (Samsung, not likely this model) a few years back that would
intermittently lose its convergence...after our first trip, on a
callback, we discovered that it had a transistor on the convergence
board (stand up, TO-92 (?, been away from this too long), metal tab,
no heat sink) that was close enough to a grounded part that it would
occasionally touch/arc, affecting the convergence. Once we bent it
forward a bit it stopped acting up. :-)

Tom


kip
"Jason Polychronopulos" wrote in
message
news
Hi,
I have a friend who brought a second hand (About 2 years old) Samsung
42"
projection TV. It worked for 3 days and then a problem appeared.

Model no. SP42W5HFX
Next to that no. SP42W5HFX/XEU

Serial no. 3KPT716665H

The problem is as follows:- (I am no expert in the TV repair field!)

When you put a cross pattern on the TV you get green and
blue fine but red is miss-aligned in to top left hand corner.

I think it is one of two problem:

1.) The red crt has an issue in the picture alignment, looks a bit like
a
magnet has been put close to the crt I guess it could be a problem with
the
board connected to the neck of the tube or the coil that controls
electro-magnetically the picture on the red crt?

2.) I don't think this is the problem but, there is an auto convergence
board that lines up the 3 crt images this could also control the set up
of
the picture in each or the crts??? Or could it be coursing this fault?

Like I said I am no expert!

Also,

I have read that if you have to change one crt then you should change
them
all as since over time the brightness degrades, if the red is just
replaced
then the colour will be un-balanced. Which I guess makes the TV a right
off!

Is it worth trying to fix the original crt/board on neck?

I have had a look for tv parts on the internet but can't find much. Does
anyone know where I can get spares from?

Does anyone want to fix it, if it's more than about £150 it's not worth
fixing?

Can may understanding, if it dose'nt look right?

Does anyone know how to get the service menu (Just out of interest?)

Where can I get a copy of the service manual?

Any other ideas?

Many Thanks to anyone who can help, Jason

No its not shielded...Replace the STK IC,s
they are very visable to the eye.

kip
"Jason Polychronopulos" wrote in message
...
Hi, Many thanks to both Kip and Tom for their replys.

I have not looked at the convergence board yet as it is shielded, but I
take it that the IC in question I should look at is fairly obvous?
What should I be looking for and what tests should I do?

If was was to replace the whole convergence board how much would one cost
and where could I get it from.


So you don't think it's a crt issue then?

Many Thanks, Jason





"Tom MacIntyre" wrote in message
...
On Wed, 7 Dec 2005 12:58:23 -0500, "kip" wrote:

Change the convergence IC,s..

Saw one (Samsung, not likely this model) a few years back that would
intermittently lose its convergence...after our first trip, on a
callback, we discovered that it had a transistor on the convergence
board (stand up, TO-92 (?, been away from this too long), metal tab,
no heat sink) that was close enough to a grounded part that it would
occasionally touch/arc, affecting the convergence. Once we bent it
forward a bit it stopped acting up. :-)

Tom


kip
"Jason Polychronopulos" wrote in
message
news Hi,
I have a friend who brought a second hand (About 2 years old) Samsung
42"
projection TV. It worked for 3 days and then a problem appeared.

Model no. SP42W5HFX
Next to that no. SP42W5HFX/XEU

Serial no. 3KPT716665H

The problem is as follows:- (I am no expert in the TV repair field!)

When you put a cross pattern on the TV you get green and
blue fine but red is miss-aligned in to top left hand corner.

I think it is one of two problem:

1.) The red crt has an issue in the picture alignment, looks a bit like
a
magnet has been put close to the crt I guess it could be a problem with
the
board connected to the neck of the tube or the coil that controls
electro-magnetically the picture on the red crt?

2.) I don't think this is the problem but, there is an auto convergence
board that lines up the 3 crt images this could also control the set up
of
the picture in each or the crts??? Or could it be coursing this fault?

Like I said I am no expert!

Also,

I have read that if you have to change one crt then you should change
them
all as since over time the brightness degrades, if the red is just
replaced
then the colour will be un-balanced. Which I guess makes the TV a right
off!

Is it worth trying to fix the original crt/board on neck?

I have had a look for tv parts on the internet but can't find much.
Does
anyone know where I can get spares from?

Does anyone want to fix it, if it's more than about £150 it's not worth
fixing?

Can may understanding, if it dose'nt look right?

Does anyone know how to get the service menu (Just out of interest?)

Where can I get a copy of the service manual?

Any other ideas?

Many Thanks to anyone who can help, Jason