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.
- 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.
Cause : RELAY 1 does not operate.
- Check method
STATE
RELAY 1 ON
RELAY 1 OFF
4. When there is no grill oscillation.
Cause : RELAY 3 does not operate.
- Check method
STATE
RELAY 3 ON
RELAY 3 OFF
5. When the door is opened during operation, the count down timer does not stop.
refer to Circuit Diagram (point 1)
- Check method
STATE
1) DOOR OPEN
2) DOOR CLOSED
CHECK NO
1
Check the stage(ON, OFF) of the door open monitor
switch by resistance measurement.
6. When the digital clock does not operate properly.
refer to Circuit Diagram (point 5)
POINT
A
refer to Circuit Diagram (point 3)
POINT
refer to Circuit Diagram (point 2)
POINT
refer to Circuit Diagram (point 6)
POINT
POINT
HETHOD
WAVE FORM
T: 20 ms(50Hz)
28
A
-5VDC
GND
A
-5VDC
GND
A
-5VDC
GND
A
OPEN
CLOSE
Replace door open monitor switch.
B
GND
-12VDC
B
GND
-12VDC
B
GND
-12VDC
B
-5VDC
GND
REMEDY
If clock does not keep
exact time, you must
check resistor R15,16,
zener diode ZD1.