Manuals / Daewoo / Kitchen Appliance / Microwave Oven

Daewoo KOR-631H9A When there is no microwave oscillation, State, Point, Check No, Method, Remedy

Models: KOR-631H9A KOR-631H0A KOR-861G0A KOR-631G9A KOR-861H0A KOR-631G0A

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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 do 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:16.7ms(60Hz)

* If clock does not keep exact time, you must check resistor R15, 16 zener diode ZD1.

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Daewoo KOR-631H9A When there is no microwave oscillation, When the digital clock does not operate properly, State, Point

Contents

Microwave Oven Service ManualS/M No. R631G0A003 Model KOR-631G0A KOR-631H0A KOR-631G9A KOR-631H9A KOR-861G0ATABLE OF CONTENTS 1. FOR SAFE OPERATION SAFETY AND PRECAUTIONS2. FOR SAFE SERVICE PROCEDURES KOR-631G/H SPECIFICATIONSKOR-631G/H9A KOR-861G/HEXTERNAL VIEW 1. OUTER DIMENSIONKOR-631G/H, 631G/H9/KOR-861G/H465/495 279/2946. SAFETY INTERLOCK SYSTEM 7. CONTROL PANEL 8. GLASS COOKING TRAY 2. FEATURE DIAGRAM1. DOOR SEAL 2. DOOR HOOK2 KOR-861G0A 3. CONTROL PANEL1 KOR-631G0A/631G9A 3. CONTROL PANEL 1 KOR-631H0A/631H9A/861H0A5. Power supply INSTALLATION1. Steady, flat location 2. Leave space behind and sideTouch POWER pad Wattage output chartPower levelDisplay Approximate Percentage of PowerCautions to be observed when trouble shooting DISASSEMBLY AND ASSEMBLY1. To remove cabinet 2. To remove door assembly2 Remove the door assembly from top plate of cavity 3 Reverse the above for reassemblyREF NO 3. To remove door partsPART CODE PART NAME1 Remove the gasket door from door weld as REF NO 5. To remove control panel partsPART CODE PART NAME6. To remove high voltage capacitor High voltage circuit wiring 7. To remove magnetron9. To remove H.V.transformer 8. To remove wind guide assemblyADJUSTMENT INTERLOCK MECHANISM AND ADJUSTMENTDefective high voltage trans- former TROUBLE SHOOTING GUIDECheck continuity of interlock plied to RELAY RY2 coil TROUBLE 3 No microwave oscillation even though fan motor rotates 1. Incomplete segments 1 Segments missing 2 Partical segments missing MEASUREMENT AND TEST 1. MEASUREMENT OF THE MICROWAVE POWER OUTPUTPROCEDURE 2. MICROWAVE RADIATION TEST PROCEDURES1. High voltage transformer 3. COMPONENT TEST PROCEDURE2. High voltage capacitor 3. High voltage diodeWIRING DIAGRAM PRINTED CIRCUIT BOARD 1. CIRCUIT CHECK PROCEDURE1. Low Voltage Transformer check 2. Voltage checkMeasure Point 5. When the digital clock does not operate properly 3. When there is no microwave oscillationSTATE POINT1 KOR-631G0A/631H0A/631H9A/631G9A 2. PCB CIRCUIT DIAGRAMSPECIFICATION SYMBOL3. P.C.B. LOCATION NO NAMESPECIFICATION SYMBOLNAME PART CODE1. DOOR ASSEMBLY EXPLODED VIEW AND PARTS LISTRefer to Disassembly and assembly 3. TOTAL ASSEMBLYDESCRIPTION PART CODEPART NAME DESCRIPTION PART CODEPART NAME DESCRIPTION PART CODEPART NAME DESCRIPTION PART CODEPART NAME PRINTED DATE Aug S/M NO. R631G0A003686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX DWELEC K28177-8 CABLE “DAEWOOELEC”