Question about Samsung HCL4715W 47" Rear Projection Television

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Convergence gone bad on Samsung HCL4715W

How can you know if it's the IC chips or the convergence board causing the problem, and can I take out the board/boards to get tested? Don't want to replace board if I don't have to.....

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You can test the Is for having the proper incoming voltages and then checking to see if they have the correct output voltages. You willnee the service manual with schematics to be able to test all the voltages for the pins on both ICs. Do you have the servicemaual? If not you can get one at the following link they email them or provide download link depending on the size o the manuals
http://servicemanuals.vstore.ca/

Posted on Jan 23, 2009

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1 Answer

Convergence problem- ghost image. replaced


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

Convergence problem


The convergence board is bad in this set. Samsung no longer has this board in stock. You will have to take the board out and rebuild it by replacing both of the STK convergence amp IC's These IC's are soldered to the printed circuit board. They will be standing up against a metal plate, called a heat sink. They are black in color and are about 2" by 3" . They have white lettering on them that start with STK and the some numbers. You get those numbers and go to mcmelectronics.com, enter the exact number of the IC and order two of them. Before you install the new IC's you will need to apply some heat sink compound onm the back of the new IC's. This heat sink compound is avaialable thruogh radio shack. Good Luck

Aug 23, 2007 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Cannot get convergence . Do not see any control on the remote control there is a large heat sink on the rear part of the chassis with a large ic mounted on it that does not get hot like the adjacent one...


Probably a connection got loose on the convergence (they crack as it gets very hot) or a bad chip

http://www.fixya.com/support/r5001731-convergence_diagnosing_convergence
Let me know if I can be of further assistance.

Jun 12, 2010 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Have the samsung HCL4715W and have a convergence problem. can someone point out the convergence board part number to this set?


STK ICs they are big black ICs will have Part number on them example STK392-020 also 2 resistors near ICs 2.7ohms most of the time they are Bad Call Mats Electronics for Parts 1-800-628-1118

Dec 17, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Why wont my tv focus it say not availible


This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Nov 24, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Convergence board for a HCL4715W? Which one?


It will be the one that has big black ICs STK394-020 for Parts callMats 1-800-628-1118 also there is 2 resistors 2.7 ohm near STKs replace if Bad.

Sep 25, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

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.

Aug 09, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Samsung three colors on screen, out of focus #hcl4715w


It is a convergence problem. The IC's (integrated circuits) or STK chips or the "guns". You have a red,and blue, IC's that provide all the colors. When the colors are out of convergence, you get ghosting or what looks like 3D pictures. I haven't been able to locate the part numbers for the IC's or STK chips but have located a convergence board. No luck determining if IC's are included (a phone call first to verify) but if they are, would make life much easier for you to install. Part # is BP95-00415H http://jr.partsearch.com/Part/Samsung/Samsung/BP9500415H/New.aspx?ModelMfgName=Samsung&ModelBrandName=Samsung&ModelNumber=HCL4715W

Typically, IC's cost around $10 or less. here is a link to a guy who provides pretty good instructions on replacing the IC's along with pictures.

http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Hope this answers your questions. Best of luck.
Greg

May 31, 2009 | Samsung HCL4715W 47" Rear Projection...

2 Answers

Anyone need any parts for the HCL4715W? Parting mine out.


More then likely set has 2 burt resistors on convergence board 2.7ohms

Jan 27, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

SAMSUNG VERTICAL PROBLEM , BUT CHIPS ARE GOOD


you have some open resistors in the convergence circuits.

May 08, 2008 | Samsung HCL4715W 47" Rear Projection...

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