Bleeder resistor

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A bleeder resistor is a resistor placed in parallel of a high-voltage supply for the purposes of discharging the energy stored in the power source's filter capacitors or other components that store electrical energy.

The bleeder resistor commonly found inside a flyback transformer that supplies high voltage for a CRT is valued in the hundreds of megohms range, and can therefore not be measured with the common technician's multimeter.

Instead of a resistor inside the transformer, the focus and screen control array may be used for the same purpose, depending on the application and tolerances of the type of tube it is producing output for.

The failure of a bleeder resistor prevents the discharge of the capacitors. This is the reason for the typical warning behind most equipment: "Warning - No user servicable parts inside". An un-suspecting technician may get an electrical shock due to failure of a bleeder resistor.

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