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Burnt resistor

Discussion in 'Electronic Repair' started by Raphael Assenat, Aug 28, 2003.

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  1. Hi,
    I recently picked up a dead PC monitor. It is a KDS 17 inch monitor,
    model VS-7i. It had a shorted capacitor which fried the resistor R312.
    Unfortunately, I cannot read the resistor value. I have tried
    different values, and it turned out that a ~2.7Ohms value worked fine
    but only when the monitor is run at high refresh rates (>70hz). At lower
    frequencies, the vertical deflection goes back up at the bottom of the
    screen, like it's missing power.

    I am not sure exactly what this resistor does(maybe current limiting?).
    It is part of the low voltage power supply. It is connected after
    the rectifier which is connected to the -12V winding of the transformer.

    Does anybody know what is the real value of this resistor? Of course I
    could try lower values, but I think knowing the real value would be
    helpful.

    Regards
    Raphael Assenat
     
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