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TEST PROCEDURES (CONT’D)
PROCEDURE
LETTER
COMPONENT TEST
F
MONITOR SWITCH TEST
Before performing this test, disconnect oven from power supply and make sure that the upper
latch switch is operating properly referring to the above Switch Test Procedure.
Disconnect the wire lead from the monitor switch (NC) terminal.
Check the monitor switch operation by using the ohmmeter as follows.
When the door is open, the meter should indicate a closed circuit.
When the monitor switch actuater is pushed by a screw driver through the latch hole on the front
plate of the oven cavity with the door opened (in this condition the plunger of the monitor switch
is pushed in), the meter should indicate an open circuit.
If improper operation is indicated, replace the defective switch.
After testing the monitor switch, re-connect the wire lead to the monitor switch (NC) terminal.
SWITCH
G
BLOWN FUSE
If the fuse in the upper latch-monitor switch circuit is blown when the door is opened, check the
upper latch switch and monitor switch according to the Test Procedure for those switches, before
replacing the blown fuse.
If the fuse is replaced, the monitor switch should be replaced at the same time.
If the fuse is blown by improper switch operation, adjust or replace the defective switch, fuse at
the same time.
Replace the fuse and monitor switch, even if the switches operate normally
CAUTION; REPLACEMENT FUSE MUST BE THE LISTED FUSE IN PARTS LIST.
(RD82C03U’)
H
MAGNETRON TEMP. FiiSE TEST
A continuity check across the temp. fuse terminals should indicate a closed circuit unless the
temperature of the temp. fuse reaches approximately 145 “C.
An open magnetron temp. fuse indicates overheating of the oven cavity. If the temp. fuse indi-
cates an open circuit, replace the temp. fuse and check for restricted air flow to the magnetron
through the vent holes of the oven cavity, especially the air duct and cooling fan ass’y.
Or an open oven temp. fuse indicate overheating of oven cavity.
Replace the oven temp. fuse and check inside of the oven cavity and unproper setting of cooking
time or accident of the timer.
(RD82G05U’)
16
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