Daewoo KOG-371H0S, KOG-373R0S, KOG-374R0S, KOG-375R0S 24VDC, Point State Relay 3 on 5VDC GND

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

	POINT	A	B
STATE
RELAY 2 ON		-5VDC	GND
RELAY 2 OFF		GND	-24VDC

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

	POINT	A	B
STATE
RELAY 1 ON		-5VDC	GND
RELAY 1 OFF		GND	-24VDC

4.When there is no grill oscillation.

✻Cause : RELAY 3 does not operate. → refer to Circuit Diagram (point 6) - Check method

	POINT	A	B
STATE
RELAY 3 ON		-5VDC	GND
RELAY 3 OFF		GND	-24VDC

5. When the door is opened during operation, the count down timer does not stop.

→refer to Circuit Diagram (point 1) - Check method

	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.

6.When the digital clock does not operate properly.

→refer to Circuit Diagram (point 5)

POINT

WAVE FORM

A

T: 20 ms(50Hz)

❈If clock does not keep exact time, you must check resistor R7,8,C5.

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