Question about Samsung HCL4715W 47" Rear Projection Television

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Samsung HCL4715W... Hello.  A friend owns a Samsung HCL4715W rear projection TV.  It does not seem to have the all too common convergence problem.  The owners complained of a "pinkish" picture.  I looked at it and saw it had blue and red but no green on the screen.  I opened the lower front panel and saw no output from the center (green) CRT, and then noticed the filament was not glowing in that tube.  I have experience with TV repair but it has been a few years since I last did this kind of thing.  Where does the CRT heater power come from?  I see it could be possible for the filament load resistor (R543) to be open or changed in value, preventing the heater from operating. Could you offer more insight into the problem?  I was thinking that if the filament is good (has resistance comparable to the other two CRTs) and I cannot restore normal CRT power to the green drive board I might be able to use the alternative method of using a few turns of wire around the flyback ferrite to pick off enough juice to get it working again. I would appreciate any help you can offer. Many Thanks, Thomas Elliott Charleston, SC

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Re: Samsung HCL4715W... - Samsung HCL4715W 47" Rear Projection Television Projection Televisions

Look for a blown fuse around the flyback

Posted on Jan 10, 2008

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Samsung HCL4715w Hdtv convergence issue

Maybe you can fix it in the service menu.
Turn off TV, press mute then 182, Turn on TV and check out new menu items

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I Have a Sumssung HCL4715W Tv timer flashes 40r 5 times and Tv turns off

A constantly blinking light means shutdown.

The most common issue in this model is convergence-----if the convergence circuit has railed (this means shorted parts) it can cause the set to do what you describe.

Before I suggest a course of action----what is your skill level with electronic repairs? Can you solder and or do a visual inspection?


Oct 28, 2011 | Samsung HCL4715W 47" Rear Projection...

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I have a similar problem with a 4715w and have a whole spare 4715w television to troubleshoot with .
In my case it seems that the board to the left is causing the problem ,

not detachable daughter board thet accepts the inputs or the center board with the flyback xfmr on it .

Jul 25, 2010 | Samsung HCL4715W 47" Rear Projection...

1 Answer

HCL4715W 47 in. Rear Projection Television: Wheb the TV is turned on the screen is fine, howev...

Yes,this tv can be fix it have convergence problems.The convergence board the 2 STK covergence ICS are defective and some or all it resistors are dead.The shop will cost u $300-350 for parts and labors.

May 16, 2010 | Samsung HCL4715W 47" Rear Projection...

1 Answer

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u may have a bad convergence board stk392-040

Apr 30, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Tv will not turn on

If your convergence ICs are bad set will not come on 1 of the ICs controls Off/on STKs big black ics replace both STK392-020s use 040s For Parts call 1-800-223-3205.

Jan 03, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

How to remove back of Samsung HCL4715W 47 in rear projection TV

the screws are identified by little arrows pointing to the screw holes. However I would be surprised if its the convergence board most times its the Convergence ICs located on the sub board

Apr 22, 2008 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Projection tv

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

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

1 Answer

TV won't power on

Disconnect the convergence board and see if the set comes on. If it does, and it probably will, replace the convergence board or the convergence amp IC's. Good Luck

Jul 26, 2007 | Samsung HCL4715W 47" Rear Projection...

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