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 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.
5. When the digital clock does not operate properly.
refer to Circuit Diagram (Point 5)
POINT
A
* If clock does not keep exact time, you must check resistor R21, R34, C2.
refer to Circuit Diagram (Point 3)
POINT
A
-2.5 VDC
GND
refer to Circuit Diagram (Point 2)
POINT
POINT
METHOD
WAVE FORM
27
B
-23.3 VDC
-29 VDC
A
-5 VDC
GND
A
OPEN
CLOSE
T:16.7ms(60Hz)
C
-24 VDC
GND
B
GND
-24 VDC
B
-5 VDC
GND
REMEDY
Replace door open monitor
switch.