Question about Toshiba TheaterWide 50HP16 50 in. Plasma HDTV

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Toshiba 50HP16 - no picture or sound.

Toshiba 50HP16 has no picture or sound. Power is cycling on and off every few seconds. When on, +5 volt is on pin 11 of CP3201 on Scaler Board and 3.3 volts is measured at pin 2 of IC3804 on the AV PCB. When cycling on, D15 lights then D17 followed by D01 on the CTRL-LVDS board. Troubleshooting Guide recommends replacing Scaler Board but I would like to make more measurements. Any recommendations?

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  • Plka Bob
    Plka Bob Nov 30, 2007

    Tech8, Thanks for responding but I'm looking for an expert in Plasma TV. I emailing premtech who has been helpful in the past and has service manuals.

  • Plka Bob
    Plka Bob Dec 03, 2007

    MosFets all check out OK. I now have an account at PTS and will send them the board for repair. Again thanks for all the info & Service Manual.

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Toshiba 50hp16 has a flashing screen,like someone taking a picture with a flash.sound is Ok.Only 3 yrs old

Posted on Oct 06, 2009

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Drummer,
Check mosfet at Q104 2SK2370 which will sub to an Nte2970 on the main power supply. Leakage can cause cycling but my bet is on the scaler board also. You say you have +5v at pin 11 of CP3201 and 3.3 at pin 2 of IC3804 - and all the troubleshooting charts and schematics I've reviewed suggest replacing the scaler board, Toshiba p/n# 72784101 and unfortunately they're about $240.00 dollars. But that sounds like the problem to me...
Bill

Posted on Dec 01, 2007

  • William Rayburn
    William Rayburn Dec 01, 2007

    PS::: I sent the service manual via Pando to your personal addy at hotmail..

    Bill

  • William Rayburn
    William Rayburn Dec 06, 2007

    No problem, let me know how it all turn out...

    Bill

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Sent me a copy of the schematic

Posted on Nov 30, 2007

  • Eugene Merritt Nov 30, 2007

    Do you have a link to the download

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