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Sanyo dp50747, I am a digital electronics tech, I have repaired about a dozen plasmas and lcd's.. I have replaced the x and y sustain boards but the problem didnt change. It may have had a power surge or lightning. I have checked output voltages on lvps and all seems ok. The tv powers on for about 20 seconds and then powers off. You can see light (snow) on the screen with a faded black and white image barely showing the HDMI input displayed in the upper right corner, but when you try to change inputs before it shuts off all remain the same. So my question is what is next? Also there seems to be several versions of the main logic board and some parts lists shows a logic board for this model that is not in this model to make it even more confusing.. The plasma engine is a samsung.

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  • Paul Schuster Sep 03, 2010

    I have this under wrong mfr. it is not a phillips it is a sanyo dp50747

  • Paul Schuster Sep 03, 2010

    LVPS: PCB Samsung lj41-05246A, I have checked all voltages and they are ok.. VS 15vdc, VA 57 vdc, 5vdc ok, 5vdc standby ok, 12vdc ok. When I first checked, there were two fuses on the LVPS replacing them restored the voltages'.

    Tuner Board: Sanyo J4DL. PCB402456
    looks the same except my board has a .33 ohm, 7 Watt large ceramic style resistor that is missing in your example and others I have seen.. Resistor ID is R1687 and is mounted vertically next to the blue connector. This connector is not used on my TV. Can I replace with a board as in your example? The rest looks the same, maybe different rev levels?

    Logic board looks the same as in your example: it is a Samsung.

    Since the customer told me it went down during lightning storm, can I assume the most logical board to try next is the tuner board? or what would you replace next.

    Not like the old days when you could actually troubleshoot instead of shot gunning the damn thing. Sort of drives me crazy. eenny meanie mighty mo, it is that one..

    Paul schuster

  • Paul Schuster Sep 03, 2010

    What I am calling a tuner board is officially called a digital video board... I cant find the exact replacement because now I see there are many versions of this board.. Everything I have found is missing the 2nd connector from the right top.. the actual part number is 1aa4B10N21300 with an extension NP140TL.

  • Paul Schuster Sep 03, 2010

    i have already checked dm... these boards are all missing the 2nd connector that is left to right top... I suppose because they do not match the extension np140tl.. thanks for the diagrams, that is a big help.

  • brian carlson
    brian carlson Nov 26, 2012

    My sanyo Dp50747 does the same thing poers up with dark snow screen ... replace logic board same thing change right side sustain board and still does same thing only thing left is power board or main micropressor board



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you can check on the link if it looks like similar to yours

and here is the logic board:

but can you give more detail on the power supply board

( Samsung ) ?

Posted on Sep 03, 2010



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Sanyo DP50747 has about a gazillian completely different implementations.

Some of them have Samsung boards inside, some have LG boards inside and yet another one has Panasonic boards inside.

Samung sets have known problem with the YSUS sustain being killed by a failing buffer board, the LG ones with the YSUS and ZSUS sustain boards, the Panasonic ones with the power board, which reminds me the previous two also have known issues with the power, but not nearly as common as with the sustain/buffers.

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