Daewoo KOD-135P9A, Service Manual

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3. When there is no microwave oscillation
1) When touching START pad, oven lamp turns on and turntable rotates.
but fan motor does not rotate.
Cause : RELAY 1, 4 does not operate. refer to Circuit Diagram (point 2, 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 3)
- Check method
4. When Pizza Oven is not heated.
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 D14,R26,R27,ZD2,C9.
POINT
A B
STATE
RELAY 1, 4 ON +5VDC GND
RELAY 1, 4 OFF GND +15VDC
POINT
A B
STATE
RELAY 1 ON +5VDC GND
RELAY 1 OFF GND +15VDC
POINT
A B
STATE
RELAY 3 ON +5VDC GND
RELAY 3 OFF GND +15VDC
POINT
A B
STATE
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 Replace door open monitor switch.
switch by resistance measurement.
POINT WAVE FORM
A
T: 16.67 ms(60Hz)