Troubles may sometimes be located by a thorough visual inspection.
This may be accomplished by looking for the following symptoms:
a. Accumulations of dirt, dust,
b. Scorched or burned parts. Damage of this type is usually caused by
other defective components. Determine the cause of damage before replacing
c. Cracks, cuts, and other damage to the polyethelene grommets or to
the circuit boards.
will cause excessive electrical leakage.