The STANDARD DIODE COLOR CODE SYSTEM serves two purposes when it is used: (1) it
identifies the cathode end of the diode, and (2) it also serves to identify the diode by number.
DIODE MAINTENANCE is the procedures or methods used to keep a diode in good operating
condition. To prevent diode damage, you should observe standard diode safety precautions and ensure
that diodes are not subjected to heat, current overloads, and excessively high operating voltages.
TESTING A DIODE can be accomplished by using an ohmmeter, the substitution method, or a
dynamic diode tester. The most convenient and quickest way of testing a diode is with an ohmmeter.