Question about Samsung HCL4715W 47" Rear Projection Television

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Green out of alignment on samsung rear projection tv

Hi my samsung rear projection tv has an alignment problem with the green. I'm an electronics apprentice but don't do tvs. if you could give me a more specific idea of what was wrong before i start fault finding without a service manual it will save me alot of time and would be greatly appreciated. Cheers Luke I have a 42" Samsung ST-42W5P rear projection TV that the RED alignment is out on. I am a RADAR technician but really haven't ever worked on TV's all that much. Definitely have never worked on rear projection types of TV's. Can you point me in the right direction?

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  • kaheinz57 May 29, 2009

    Can you dumb that down for me a bit? Where would I start? I don't have a service manual and have no clue what is what in there.

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Hi luke I am in the uk and not familiar with this set is it a three tubed crt television or an lcd projector type .. either way what you are descibing is convergence ( three primary colour guns all pointing at the same spot in a nutshell ) in the case of a crt projection tv three tubes one red one green one blue .. there should be a convergence pattern in the menu to re set the convergence via the remote check the manual . If it isn't adjustable you may have a scan coil fault or a tube ie : green with low emission check the green colour gun transistor and associated circuit for leaky caps resistors that have changed value or transistor leakage .. and don't forget the ever popular dry joints on the scan coil plugs .. hope this helps Vortash

Posted on May 29, 2009

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For the set to have two STK392-XXX parts. one is probably failed,and may have also fried a 1-watt resistor close to it. If you do a search for the datasheet for the part, you should find a partial schematic in the typical applications for the part. It should be enough for you.

Posted on May 29, 2009

  • Bruce Volkers
    Bruce Volkers May 29, 2009

    Look for a "convergence board" as the parts in question will be located there. The board is behind a removable front panel in some TV's

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