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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.
Cause :
RELAY 2
does not operate. refer to Circuit D iagra m ( Poin t 3)
- Check method
2) When touching
START
pad, oven lamp turns on.
Fan motor and turntable rotate and cook indicator in display comes on.
Cause :
RELAY 1
does not operate. refer to Circuit D iagra m ( Poin t 2 )
- Check method
4. When the door is opened during operation, the count down timer does not stop.
refer to Circuit Diagram( Point 1 )
- Check method
5. When the digital clock does not operate properly.
refer to Circuit Diagram( Point 5 )
If clock does not keep exact time, you must check resistor R15,16, zener diodeZD1.
POINT
STATE A B
RELAY 2
ON - 5VDC GND
RELAY 2
OFF GN D - 12VDC
POIN T
STATE A B
RELAY 1
ON -5V D C GND
RELAY 1
OFF GND -12VDC
POIN T
STATE A B
1) DOOR OPEN OPEN -5VDC
2) DOOR CLOSED CLOSE GND
CHECK NO METHOD REMEDY
1Check the stage(ON,OFF) of the door open monitor switch by resistance
measurement.
Replace door open monitor switch.
POINT WAVE FORM
A T: 16 .67m s(6 0 Hz)