Question about Samsung HCL4715W 47" Rear Projection Television

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Suddenly Green focus shift off and cann't be able to autoalign

I have a Samsung HCL4715W 47" rear Projection Television. All of a sudden It gives pictures with green shadow and when i try to do autoaligh green gun not aligning in center. So can someone help me what could be wrong... Thanks,

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  • 16 Answers

There is a Convergance board that needs to be replaced.there is no way of fixing that problem without replacing that board first

Posted on Feb 22, 2007

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I was watching my HCL4715W TV and the picture


It sounds like one of the convergence Ic chips is bad---you will need to locate and replace both of them and look for any damaged parts around them; there usually are two pico fuses in this area, one for each IC. The fuses do not look like glass fuses--they usually are green or orange in color and will have the amperage marked on them and on the top of the circuit board.

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Apr 15, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

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replace the two convergence ICs and also check the 3.9 ohm resistors

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May 13, 2008 | Samsung HCL4715W 47" Rear Projection...

1 Answer

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A lot of times when the convergence ICs blow, there are also problems with resistors on the board (talking from Hitachi experience), or the board itself.

If the other problems, like blown resistors, are not repaired, the ICs will blow again right away. If the ICs are your only problem, then replacing them may work
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Jan 10, 2008 | Samsung HCL4715W 47" Rear Projection...

1 Answer

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Replace convergence amp IC's = tech skill required.
Then activate auto focus...............T.

Let me know if you want step-by-step help....................

Nov 18, 2007 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Internal Screen Adjustments No Response


thr focus block assy.has the screen and focus controls on it it about 3"x3" in size has red wires attached to it and one feeding form the flyback transformer to it.

Aug 29, 2007 | Samsung HCL4715W 47" Rear Projection...

1 Answer

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your screen and focus controls need adjustment to acheive a good grey scale picture the adjustment are not on the crt neck boards.(focus block)

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screen adjustment,remove front bottom cove and find the focus block the screens are also on the same block,if your not sure don't try.

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