Daewoo KOR-63FB0S, KOR-63FB9S, KOR-63DB9S State Point, Gnd, Check no Method, Point Wave Form

3. When there is no microwave oscillation

1) When touching START pad, oven lamp does not turn on.

Fan motor does not rotate, but cook indicator in display comes on.

*Cause : RELAY 2 does not operate. → refer to Circuit Diagram (Point 3) - Check method

STATE	POINT	A	B
RELAY 2 ON		-5VDC	GND
RELAY 2 OFF		GND	-12VDC

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

STATE	POINT	A	B
RELAY 1 ON		-5VDC	GND
RELAY 1 OFF		GND	-12VDC

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

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

STATE	POINT	A	B
1) DOOR OPEN		OPEN	-5VDC
2) DOOR CLOSED		CLOSE	GND

CHECK NO

1

METHOD

Check the stage (ON, OFF) of the door open monitor switch by resistance measurement.

REMEDY

Replace door open monitor switch.

5.When the digital clock does not operate properly.

→ refer to Circuit Diagram (Point 5)

POINT

A

WAVE FORM

T:20ms(50Hz)

* If clock does not keep exact time, you must check resistor R23, 24 zener diode ZD2.

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