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Diode: Testing and Inspection

INSPECTION

DIODE

CAUTION: Never use a megatester (measuring use for high voltage) or any other similar measure for this test; otherwise, the diodes may be damaged.




1. Checking positive diode
Check for resistance of 1 Ohm or less between the diode lead and the positive side heat sink. The positive diode is in good condition if resistance is 1 Ohm or less only in the direction from the diode lead to the heat sink.




2. Checking negative diode
Check for resistance of 1 Ohm or less between the negative side heat sink and diode lead. The negative diode is in good condition if resistance is 1 Ohm or less only in the direction from the heat sink to the diode lead.
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