Question about Samsung HCL4715W 47" Rear Projection Television

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

I need to replace the convergence board on my HCL4715W (part number AA95-01799G), but for the life of me cannot figure out how to remove the cover on the back of the TV. I called Samsung and they initially said that instructions would accompany the part, but that wasn't the case. They suggested I purchase the service manual for the TV, but could not confirm that the instructions would be in there. Since a number of you fixed this, can anyone walk me through it? Maybe I am a ****, but I just can't seem to figure it out. Thanks!

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  • K. Viar Apr 26, 2008

    Slinteriors, you must be correct. I figured out how to open the back of the TV (some overlooked screws by my husband... LOL). We replaced the convergence board... to no avail.



    Can you provide more info about the Convergence ICs on the sub board.... is that something a layperson can fix on his own? We're on the fence about how to save this TV because it hardly seems worth it to pay a repairperson upwards of $600 to fix it.... if we can't fix it ourselves, we'd rather invest in a new TV.



    Many thanks for your input and I hope someone can help point us in the right direction for a fix.

  • K. Viar Apr 26, 2008

    Thank you! One more question, if you will humor me a bit further. Will the fix require soldering? My husband seems to think so and does not feel he can handle that. I really appreciate your assistance!

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  • Samsung Master
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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

Posted on Apr 25, 2008

  • Sonny Berry
    Sonny Berry Apr 26, 2008

    Your model uses (2) STK392-040 convergence ICs. This is a fairly easy repair. In fact if you order your ICs through this link they will provide free instalation instructions with pics as well as free on line tech support. The job takes about 45 minutes from beginning to end. The ICs are located on the Huge heat sinks on the sub Board ( board on the right) They are big black ICs you will see STK392-040 stamped on them. They both need to be replaced. Heres the link to that site.

    http://servicemanuals.vstore.ca/

  • Sonny Berry
    Sonny Berry Apr 26, 2008

    Yes the repair does require soldering but only in the most basic sense of the word. Its actually just touch the solder iron tip to one side of the pin and touch the pin with the solder then move on to the next pin. That site also installs the new ICs and then ships the boards back which is about the same charge as most shops charge just to come look at the set, if you dont feel confident doing it yourself.

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You have a bad convergence board. Replace two of the STK 392-040 ICs. And check all the resistors that are next to these ICs. Rplace the resistors as neccessary. This will repair your TV. Thanks for asking...sorry it took so long to find you!

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See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

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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.

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As long as you can solder you should be okay, however i would suggest getting your ICs at the following link because they provide free instalation instructions with pictures on how to remove and replace the Convergence ICs. heres the link.
http://servicemanuals.vstore.ca/

Apr 26, 2008 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Convergence board for Samsung HCL4715w


The Convergence ICs will need to be replaced , 95% of the time thats the problem they are on the sub board not the convergence board. You will need two STK392-040 ICs . you can get replacements at the following link and they will provide free installation instructions along with free on-line tech support when you install them. takes about 45 minutes. Heres the link.
http://servicemanuals.vstore.ca/

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The convergence board wont correct the problem. You need to replace the two Convergence ICs on the sub board STK392-040 and you will be back to normal. See my response above. That site will help you get it back to normal.

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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

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