Question about InFocus ScreenPlay 4805 Multimedia Projector

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Before i just buy a bulb i was wondering if it could be something else or is it just the bulb cause i can here the motor running

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  • regprodigy Apr 15, 2009

    it was very bright and showed no signs of the bulb going dim then turned it on and it was no light at all

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All I can tell yo is that there can be something else, as when the bulb AC power supply is faulty you get same symptoms as a blown bulb. The most common situation is that the bulb has blown and the bulb cannot be tested if not mounting into a working unit.
The lamp power board can be tested by a technician reading voltage out and testing components.

Posted on Apr 15, 2009

  • Ginko
    Ginko Apr 15, 2009

    If the motor runs and there is power, then it is not the main PSU.

    If it is completely off , it is also unlikely a problem on inputs or main board.

    The most common is a blown bulb.

    The only part that cause same conditions is the high voltage circuit that supply power to the lamp, that usually is a separate small board connected to the lamp assembly.

    Normally the user can only replace the lamp, for safety reasons. While a technician will test first the board, reading high voltage out , voltages in to the lamp pwb.


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