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Topic:Kt Kingtronics How to Test Bridge Rectifiers and Zener Diodes
Content:
Bridge rectifiers and zener diodes are commonly used in electronic products such as computers and stereos. Bridge rectifiers are composed of a four-diode array.These diodes convert alternating current into direct current. Bridge rectifiers have four leads, and are found in power supplies. Zener diodes are used to provideregulated voltage for power supplies. A failure of either a bridge rectifier or zener diode prevents electronic devices from working properly.Bridge Rectifier Unplug the device that contains the bridge rectifier. This ensures the bridge rectifier is without power. Set the digital multimeter, or DMM, to the "diode test" setting per the device's instructions. Test the bridge rectifier diodes. Place the DMM's two leads on two adjacent rectifier pins. The DMM will read either "OL," indicating an open circuit; or a voltage of 0.7 volts DC or less. Switch the DMM leads. An operational bridge rectifier diode shows a reading opposite of the previous
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