Daewoo KOG-8A1R5P, Service Manual

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3. When there is no microwave oscillation
1) When touching the START pad, oven lamp does not turn on.
Fan motor do not rotate, but cook indicator in display comes on.
- Check method
2) When touching the START pad, oven lamp turns on.
Fan motor and turntable rotate and cook indicator in display comes on.
- Check method
4. When the door is opened during operation, the count down timer does not stop.
-Check method
5. When the digital clock does not operate properly.
→
refer to Circuit Diagram
* If clock does not keep exact time, you must check resistor R25, R26, D15, C5 and zener diode ZD2.
STATE
POINT
A B
RELAY 2 ON 5VDC GND
RELAY 2 OFF GND 15VDC
STATE
POINT
A B
RELAY 1 ON 5VDC GND
RELAY 1 OFF GND 15VDC
STATE
POINT
A B
1) DOOR OPEN OPEN 5VDC
2) DOOR CLOSED CLOSE GND
CHECK NO METHOD REMEDY
1 Check the stage (ON, OFF) of the door open monitor switch by Replace door open monitor
resistance measurement. switch.
POINT WAVE FORM
IC 1 PIN 8
T
T:20ms(50Hz)
5V
0V