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Pioneer PDP-433MXE Power Supply fault

Discussion in 'Electronic Repair' started by Ian French, Aug 15, 2007.

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  1. Ian French

    Ian French Guest

    I am attempting to repair the Power Supply Unit ( board number PCB2310
    A06-12196B MDK79V-0) fitted to a Pioneer plasma panel PDP-433MXE (similar to
    a PDP-503MXE).
    I have found most of the faulty components, caused by the failure of Q127,
    and its source resistor, but I don't know what caused Q127 to fail in the
    first place. I have traced out part of the circuit (schematic) and have
    tested all of the likely items.

    I am unable to find a service manual on the web which contains a circuit
    diagram, but I have found some references to this fault on a Russian
    website, only problem is I don't read Russian ! Even so this has been
    usefull in identifying some of the failed components.

    Does anyone out there have a circuit / schematic for the power supply which
    I can have, or does anyone know what causes this fault?

    Any help would be most appreciated.


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