Akai rear projection HDTV problem
 

Hi all,

I have an "old" Akai PT4298HD rear projection with the following problem.
You can see the problem in the folliwng links:

http://nir.chen.googlepages.com/Picture005Small.jpg
http://nir.chen.googlepages.com/Picture006Small.jpg

Can anypne guess what is can be and recomand on a fix?

Thanks,

Nir.

Akai rear projection HDTV problem
 

Well, it looks like a serious problem of misconvergence. The display in the
second picture shows the screen where you can set the convergence, but in a
case this extreme I don't know if there's enough latitude in the controls.

It's possible there's been some sort of failure in the circuitry of one of
the colors (probably the green, based on the picture), and it will need
repairs.

Did this come about suddenly? Were there any associated phenomena (noise,
smoke, etc.)?

PS: May I ask how "old" the set is? I have an Akai PT5598 that is two years
old, and running fine.
--
Gerry



"nchen" wrote in message
...

Hi all,

I have an "old" Akai PT4298HD rear projection with the following
problem.
You can see the problem in the folliwng links:

http://nir.chen.googlepages.com/Picture005Small.jpg
http://nir.chen.googlepages.com/Picture006Small.jpg

Can anypne guess what is can be and recomand on a fix?

Akai rear projection HDTV problem
 

The Samsung design may have sustained convergencecorrection or output
circuit problems. Have it checked out, might just be the CG Amp assembly or
even problems in the signal board, requiring a complete registration setup,
after replacing it.
"Gerry Wheeler" wrote in message
k.net...
Well, it looks like a serious problem of misconvergence. The display in
the second picture shows the screen where you can set the convergence, but
in a case this extreme I don't know if there's enough latitude in the
controls.

It's possible there's been some sort of failure in the circuitry of one of
the colors (probably the green, based on the picture), and it will need
repairs.

Did this come about suddenly? Were there any associated phenomena (noise,
smoke, etc.)?

PS: May I ask how "old" the set is? I have an Akai PT5598 that is two
years old, and running fine.
--
Gerry



"nchen" wrote in message
...

Hi all,

I have an "old" Akai PT4298HD rear projection with the following
problem.
You can see the problem in the folliwng links:

http://nir.chen.googlepages.com/Picture005Small.jpg
http://nir.chen.googlepages.com/Picture006Small.jpg

Can anypne guess what is can be and recomand on a fix?

Hi all,

Thanks for getting back to me. I got this set from a friend and I guess that it is ~ 3 is old. I checked the circuts and it does not look damaged or burned.

I am whilling to invest few $$ to try to repair it by myslef but ordering services will cost xxx$ which is why to much for such unit.

Can anyone sugest which circut should be replaced, maybe you have the part # and where I can order it?

Thanks,

Nir.

Akai rear projection HDTV problem
 

First off, the GC Amp (Convergence Output). Or replace the 2 stk output
devices and check all the low value resistors, replace any that are out of
tolerance, if in doubt, get a serice manual, from SAMSUNG.
"nchen" wrote in message
...

Hi all,

Thanks for getting back to me. I got this set from a friend and I guess
that it is ~ 3 is old. I checked the circuts and it does not look
damaged or burned.

I am whilling to invest few $$ to try to repair it by myslef but
ordering services will cost xxx$ which is why to much for such unit.

Can anyone sugest which circut should be replaced, maybe you have the
part # and where I can order it?

Thanks,

Nir.


--
nchen