2
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 connection.
(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.
TABLE OF CONTENTS
PROPER USE AND SERVICE PRECAUTIONS.........................................................................................................3
SPECIFICATIONS........................................................................................................................................................4
FEATURES DIAGRAM.................................................................................................................................................5
INSTALLATION ............................................................................................................................................................6
OPERATION.................................................................................................................................................................7
MEASUREMENT OF THE MICROWAVE OUTPUT POWER....................................................................................8
MICROWAVE RADIATION TEST................................................................................................................................9
WIRING DIAGRAM.....................................................................................................................................................10
CIRCUIT DESCRIPTION ...........................................................................................................................................12
PRECAUTIONS FOR DISASSEMBLY AND REPAIR...............................................................................................14
DISASSEMBLY AND ASSEMBLY.............................................................................................................................15
INTERLOCK MECHANISM........................................................................................................................................21
TROUBLE SHOOTING GUIDE..................................................................................................................................23
COMPONENT TEST PROCEDURE..........................................................................................................................25
SAFETY INTERLOCK CONTINUITY TEST..............................................................................................................26
EXPLODED AND PARTS LIST..................................................................................................................................27