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.

27

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Daewoo KOR-63FB0S, KOR-63FB9S, KOR-63DB9S, KOR-63DB0S service manual State Point, Gnd, Check no Method, Point Wave Form

KOR-63DB0S, KOR-63DB9S, KOR-63FB9S, KOR-63FB0S specifications

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