Manuals / Daewoo / Kitchen Appliance / Microwave Oven

Daewoo KOR-63FB0S When there is no microwave oscillation, State, Point, Check No, Method, Remedy

Models: KOR-63DB0S KOR-63DB9S KOR-63FB9S KOR-63FB0S

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3. When there is no microwave oscillation

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
		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
		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
		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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Daewoo KOR-63FB0S When there is no microwave oscillation, When the digital clock does not operate properly, State, Point

Contents

Model KOR-63DB9S KOR-63DB0S KOR-63FB9S KOR-63FB0S Microwave OvenS/M No. R63DB9S002 TABLE OF CONTENTS 2. FOR SAFE SERVICE PROCEDURES SAFETY AND PRECAUTIONS1. FOR SAFE OPERATION SPECIFICATIONS KOR-63DB9SKOR-63DB0S KOR-63FB9S1. OUTER DIMENSION EXTERNAL VIEW2. FEATURE DIAGRAM 6. SAFETY INTERLOCK SYSTEM 7. CONTROL PANEL 8. GLASS COOKING TRAY1. DOOR SEAL 2. DOOR HOOK3. CONTROL PANEL INSTALLATION 5. Power supply7. Do not operate the oven if it is colder than room temperature 1. Steady, flat locationWattage output chart Touch POWER buttonPower levelDisplay Approximate Percentage of PowerDISASSEMBLY AND ASSEMBLY Cautions to be observed when trouble shooting2. To remove door assembly 1. To remove cabinet2 Remove the door assembly from top plate of cavity 3 Reverse the above for reassembly3. To remove door parts REF NOPART CODE PART NAME1 Remove the gasket door from door weld as 5. To remove control panel parts REF NOPART CODE PART NAMEHigh voltage circuit wiring 7. To remove magnetron 6. To remove high voltage capacitor8. To remove wind guide assembly 9. To remove H.V.transformerINTERLOCK MECHANISM AND ADJUSTMENT ADJUSTMENTApprox TROUBLE SHOOTING GUIDEblows Open power sup power supply cordswitch plied to RELAY RY2 coilCONDITION TROUBLE 3 No microwave oscillation even though fan motor rotatesContinuity in 11. Incomplete segments 1 Segments missing PROCEDURE 1. MEASUREMENT OF THE MICROWAVE POWER OUTPUTMEASUREMENT AND TEST PROCEDURES 2. MICROWAVE RADIATION TEST3. COMPONENT TEST PROCEDURE 1. High voltage transformer2. High voltage capacitor 3. High voltage diodeWIRING DIAGRAM 1. CIRCUIT CHECK PROCEDURE PRINTED CIRCUIT BOARD1. Low Voltage Transformer check 2. Voltage checkMeasure Point MP1 MP23. When there is no microwave oscillation 5. When the digital clock does not operate properlySTATE POINT2. PCB CIRCUIT DIAGRAM SYMBOL SPECIFICATION3. P.C.B. LOCATION NO NAMEEXPLODED VIEW AND PARTS LIST 1. DOOR ASSEMBLYRefer to Disassembly and assembly 3. TOTAL ASSEMBLYPART NAME PART CODEDESCRIPTION PART CODE PART NAMEDESCRIPTION TM-N70S0-63T KOR-63DB9S/63FB9SS/M NO. R63DB9S002 PRINTED DATE Jul686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX DWELEC K28177-8 CABLE “DAEWOOELEC”