Manuals / Daewoo / Kitchen Appliance / Microwave Oven

Daewoo KOR-861G0A, KOR-631G0A TROUBLE 3 No microwave oscillation even though fan motor rotates

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

1 38

Download 38 pages 30.42 Kb

Page 21

(TROUBLE 3) No microwave oscillation even though fan motor rotates.

(TROUBLE 3) No microwave oscillation even though fan motor rotates.

CONDITION				CHECK				RESULT


No
No				Check continuity of high				Continuity
microwave								Continuity


oscillation				voltage capacitor terminals
				with wires removed
				with wires removed


				Check continuity of high voltage				Continuity in
				Check continuity of high voltage				Continuity in
				rectifier in forward and backward				backward
				rectifier in forward and backward				backward
				direction with DC megger				direction


				Connect megger leads to mag-				Continuity
								Continuity


				netron terminal and magnetron
				netron terminal and magnetron
				body


				Check resistance of primary and				0 Ω or ∞
								0 Ω or ∞


				secondary coil of high voltage
				transformer


				Check continuity of magnetron				No
								No
								Continuity
				with wires removed
				with wires removed


				Check continuity of filament termi-				No
								No
								Continuity
				nal of high voltage transformer
				nal of high voltage transformer


				Check D.C. voltage being sup-				0 V
								0 V


				plied to RELAY (RY1) coil


								Approx
								Approx
								15 VDC

CAUSE

Defective high voltage trans- former

Defective high voltage rectifier

Defective mag-

netron

Defective high voltage trans- former

Defective mag-

netron

Defective high voltage trans- former

Defective touch

control circuit

Faulty

contacts or

RELAY (RY1)

or open

relay coil

REMEDY

Replace

Replace

Replace

Replace

Replace

Replace

Replace

Replace

20

Image 21

Daewoo KOR-861G0A, KOR-631G0A, KOR-861H0A, KOR-631G9A TROUBLE 3 No microwave oscillation even though fan motor rotates

Contents

Microwave Oven Service ManualS/M No. R631G0A003 Model KOR-631G0A KOR-631H0A KOR-631G9A KOR-631H9A KOR-861G0ATABLE OF CONTENTS SAFETY AND PRECAUTIONS 2. FOR SAFE SERVICE PROCEDURES1. FOR SAFE OPERATION 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 HOOK3. CONTROL PANEL 1 KOR-631G0A/631G9A2 KOR-861G0A 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 ADJUSTMENTTROUBLE SHOOTING GUIDE Check continuity of interlockDefective high voltage trans- former 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 1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT PROCEDUREMEASUREMENT AND TEST 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 ASSEMBLYPART CODE PART NAMEDESCRIPTION PART CODE PART NAMEDESCRIPTION PART CODE PART NAMEDESCRIPTION PART CODE PART NAMEDESCRIPTION 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”