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Temperature
Resistance K¶
“HINT”
PROCEDURE FOR DETERMING WHETHER THE UPPER MAGNETRON CIRCUIT OR LOWER MAGNETRON
CIRCUIT IS DEFECTIVE.
SYMPTOM:One magnetron does not work giving less than normal heat.
Caution:
Make sure that cabinet (outer wrap) and rear plate are not removed from the oven for your safety.
1.Operate oven as follows.
1)Place a cup of water in the oven
2)Close the door.
3)Touch “CLEAR”, “TIME”, “5”, “0” and “START” keys to operate the oven for 50 seconds with full power level.
2. Determine if the Exhaust air is warm in the following positions..
1)Put your hand near the exhaust duct outside of the rear plate to feel the exhaust (Never remove
the cabinet and rear plate from the oven for your safety when you put your hand near exhausting duct.)
2)If air from the upper position of the duct is not warm,the upper magnetron circuit is defective.
If air from the lower position of the duct is not warm,the lower magnetron circuit is defective.
Cabinet(outer wrap)
Rear Plate
Upper position
Lower position
Exhaust Duct
Rear Plate
The H.V Transformer for
operating the lower Magnetron
is located on the inside of the
rear plate
The H.V Transformer for
operating the upper Magnetron
is located on the inside of the
rear plate
Figure 11
THERMISTOR CHART
Thermistor connector
Duct
Magnetron