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