Question about Samsung HCL4715W 47" Rear Projection Television

1 Answer

Power light flashing

Hey,
I have a Samsung HCL4715W that has a flashing power light. I've been doing a little digging and I haven't come up with anything yet. I noticed the TV had been previously serviced. So far I've just been looking for shorts in the power supply but have come up empty so far. I noticed that the switcher for the power supply gets awfully warm but has no shorts on it after I pulled it out. Let me know what you think. Thanks

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  • 5 more comments 
  • Andrew Hawkins
    Andrew Hawkins Jan 29, 2009

    I unplugged the convergence yokes and it still is flashing the power light

  • Andrew Hawkins
    Andrew Hawkins Jan 29, 2009

    So the problem is the sub deflection board? To clarify, is that the one that has the AC cord coming in on it? It also has the switcher on it......I would rather not replace a whole board so as long as I know that the problem is most likely on that board I will do more in-depth searching to find the bad part. Thanks

  • Andrew Hawkins
    Andrew Hawkins Jan 29, 2009

    Thanks for your guidence. I am suprised that you actually have that board. If you have any more advice I would greatly appreciate it otherwise.....FIXYA!!

  • Andrew Hawkins
    Andrew Hawkins Jan 30, 2009

    Well, I pulled the board and I have found that Q473 has 44 ohms from base to emitter. But I can't figure out what exactly the part it is. It has C4125 1L3 on it. I would like to find this part or a datasheet so that I could cross reference it with a different equal part. Thanks.

  • Andrew Hawkins
    Andrew Hawkins Jan 30, 2009

    Thanks!!! I wish that I would have made that another post so I could give you another FIXYA!!! In the future I will try to make them separate. Thanks again

  • Andrew Hawkins
    Andrew Hawkins Mar 09, 2009

    So I finally got my 2SC4125 and just installed it and I just got it back together and it still doesn't work. Is there anything else you can think of?

  • Andrew Hawkins
    Andrew Hawkins Mar 09, 2009

    Right now I'm actually shooting in the dark. Also, I made a new post so we can start a new dialog in there so you can get more credit for it. Thanks. I will check the standy voltages are there specific places I should check?

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  • Samsung Master
  • 8,617 Answers

Unplug the convergence yokes then try powering up the set. If it powers up the ICs are bad.

Posted on Jan 29, 2009

  • 4 more comments 
  • Sonny Berry
    Sonny Berry Jan 29, 2009

    replace the sub deflection board that has all the misc. power supplies on it.

  • Sonny Berry
    Sonny Berry Jan 29, 2009

    The sub deflection board is the board with the HV transformer on it. hears a picture of it

  • Sonny Berry
    Sonny Berry Jan 30, 2009

    Thanks. yes I have access to most boards for just about all televisions where I work, as I have done just large screen TV repair for about 30 years now. If you need assistance please let me know.

  • Sonny Berry
    Sonny Berry Jan 30, 2009

    Q473 is a 2SC4125 Horizontal output transistor it will sub to a NTE2365 Minor mechanical differences in the NTE sub, But it will work in most applications. But the 2SC4125 is a toshiba trans so it should be readily available.

  • Sonny Berry
    Sonny Berry Jan 30, 2009

    youre welcome and thanks. I am here if you need more assistance.

    Slinteriors

  • Sonny Berry
    Sonny Berry Mar 09, 2009

    Do you have the schematics to which you can check to see which voltages are not up to specs? For the led to be blinking it has to be the operational supplies, So the stand by voltages must be ok

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1 Answer

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?

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Your problem is do to shorted Convergence Ic's which will not let the set power up until problem is rectified. You have a very reliable set there. The Ic's will cost about $25.00 for the pair and a tech can install them reasonably cheap. I do recommend repairing it.

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Aug 19, 2009 | Samsung HCL4715W 47" Rear Projection...

1 Answer

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

1 Answer

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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. www.electronix.com

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

1 Answer

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Aug 25, 2007 | Samsung HCL4715W 47" Rear Projection...

1 Answer

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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

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

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