10
R-25AM
catching fire.
If the thermistor is open, the control panel will display
"EE6" and the oven will stop.
MAGNETRON THERMISTORS TH1, TH2
The thermistor is a negative temperature coefficient type.
The air temperature around the magnetron is detected
through the resistance of the thermistor.
If the temperature is high, the control panel will display
"EE17" and the oven will stop to protect the lower magn-
etron against overheat.
If the magnetron thermistor is open, the control panel will
display "EE16" and the oven will stop.
If the magnetron thermistor is short, the control panel will
display "EE19" and the oven will stop.
BLOWER MOTOR BM
The blower motor BM drives a blade which draws external
cool air into the oven. This cool air is directed through the
air vanes surrounding the magnetrons and cools the
magnetrons. This air is channelled through the oven cavity
to remove steam and vapours given off from the heating
foods. It is then exhausted through the exhausting air
vents at the oven cavity.
ANTENNA MOTORS SM
The upper and lower antenna motors SM drive stirrer
antennas.
OVEN LAMP OL
The oven cavity light illuminates the interior of the oven so
that food being cooked can be examined visually through the
door window without having to open the door. The oven lamp
is on during the cooking cycle and idle condition.
TROUBLESHOOTING GUIDE
When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks.
Many of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure
letter which will be found in the “Test Procedure”section.
IMPORTANT: If the oven becomes inoperative because of a blown fuse F1 F10A (or F2 F10A) in the interlock switch
SW1 (or SW2) - monitor switches SW3 (or SW4) , check the interlock switch SW1 (or SW2) and monitor
switches SW3 (or SW4) before replacing the fuse F1 F10A (or F2 F10A).
