30
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 Diagram (point 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 Diagram (point 2)
- Check method
4. When there is no grill oscillation.
✻
Cause : RELAY 3 does not operate.
→
refer to Circuit Diagram (point 6)
- Check method
5. When the door is opened during operation, the count down timer does not stop.
→
refer to Circuit Diagram (point 1)
- Check method
6. 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 diode ZD1.
POINT
A
B
STATE
RELAY 2 ON
-5VDC
GND
RELAY 2 OFF
GND
-12VDC
POINT
A
B
STATE
RELAY 1 ON
-5VDC
GND
RELAY 1 OFF
GND
-12VDC
POINT
A
B
STATE
RELAY 3 ON
-5VDC
GND
RELAY 3 OFF
GND
-12VDC
POINT
A
B
STATE
1) DOOR OPEN
OPEN
-5VDC
2) DOOR CLOSED
CLOSE
GND
CHECK NO
HETHOD
REMEDY
1
Check the stage(ON, OFF) of the door open monitor
Replace door open monitor switch.
switch by resistance measurement.
POINT
WAVE FORM
A
T: 20 ms(50Hz)
