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3. When there is no microwave oscillation
1) When touching START pad, oven lamp does not turn on.
Fan motor do not rotate, but cook indicator in display comes on.
-Check method
STATE
RELAY 2 ON
RELAY 2 OFF
2) When touching START pad, oven lamp turns on.
Fan motor and turntable rotate and cook indicator in display comes on.
-Check method
STATE
RELAY 1 ON
RELAY 1 OFF
4. When the door is opened during operation, the count down timer does not stop.
-Check method
STATE
1) DOOR OPEN
2) DOOR CLOSED
CHECK NO
Check the stage(ON, OFF) of the door open monitor switch
1
by resistance measurement.
5. When the digital clock does not operate properly.
→ refer to Circuit Diagram
POINT
+5V
IC 1 PIN 8
0V
* If clock does not keep exact time, you must check resistor R12, R17, D8, C3 and zener diode ZD1.
POINT
POINT
POINT
METHOD
WAVE FORM
A
5VDC
GND
A
5VDC
GND
A
OPEN
CLOSE
T:16.67ms(60Hz)
26
B
GND
11VDC
B
GND
11VDC
B
5VDC
GND
REMEDY
Replace door open monitor switch.
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