PRECAUTIONS TO BE OBSERVED BEFORE
AND DURING SERVICING TO AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
(a) DO NOT operate or allow the oven to be operated with the door open.
(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwave source, and make repairs as necessary: (1) interlock operation, (2) proper door closing, (3) seal
and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5)
evidence of dropping or abuse.
(c) Before turning on microwave power for any service test or inspection within the microwave generating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment,
integrity, and connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation
and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual
before the oven is released to the owner.
(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be
performed on each oven prior to release to the owner. Refer to page 36 for leakage test procedures.
PROTECTIVE EARTH GROUND SYMBOL
This symbol identifies the terminal which is intended for connecting an external conductor for
protection against electric shock in case of a fault, or the terminal of a protective earth (ground)
electrode.
EQUIPOTENTIAL BONDING SYMBOL
This symbol identifies the terminals which, when connected together, bring the various parts of an
equipment or of a system to the same potential, not necessarily being the earth (ground) potential,
e.g. for local bonding.
SAVE THESE INSTRUCTIONS
IMPORTANT SAFETY INSTRUCTIONS
iii
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