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Question about Toshiba TP50H50 50" Rear Projection Television

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Toshiba tp50h50 Lost picture and sound, blinks red on frount pannel. Fuse blowen on pb8102-2 powerbord. If I remove a wire from this powerboard picture and sound return but out of focus. I replaced both stk ic and checked resistors around the ic. Im guessing but voltage from the power supply may be off. Where on the board would be a good spot to measure all the voltage to see if its correct? If you have any ideas please let me know? Thanks

Posted by Rick Paul on

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  • Rick Paul Mar 17, 2007

    The fuse on PB8102 at location F850 blows out and tv comes on, and is out of focus. if I remove wire (P807) from this board fuse is ok tv goes on same problem.

    I have also checked fuse f470 and have 125Vdc

    Have made other checks but could use a little help.


  • Rick Paul Mar 18, 2007

    I was checking the main power supply
    and I hope i did it correctly using a digital mulimeter. First I unpluged p807 and replaced fuse850 on PB8102. By unpluging p807 kept the fuse from blowing and tv on.

    D856 & D855 showed 0vdc s/b +36

    D851 showed 0vdc s/b +18

    D854 showed 0vdc s/b -18

    D886 showed 13vdc & D889 20vcd s/b +38

    D891 showed 13vdc & D894 14vdc s/b +12

    D882 showed 20vdc &D884 25vdc s/b +125

    Checked both ends of the diode for differant reading about the same.

    Please let me know what you think?


  • Rick Paul Mar 29, 2007

    I do have a manual there not so great!

    would have like a little input then a brush off!


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You really should get a service manual for this set to check the voltages. If you found out what the wire was for that you remove from the board to get the set to come on, you could troubleshoot and narrow down your problem. Without it you would be guessing. Good Luck and let us know how you made out.

Posted on Mar 17, 2007

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