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삼

흥

정

판

DIVISION 20

BASIC FIELD MANUAL

FOR

MICROWAVE OVEN

MODEL 721.62222300 / 721.62222301

721.62229300 / 721.62229301

May, 2005

MODEL 721.62222

721.62229

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2
3
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Summary of Contents for 721.62222300

Page 1: ...DIVISION 20 BASIC FIELD MANUAL FOR MICROWAVE OVEN MODEL 721 62222300 721 62222301 721 62229300 721 62229301 May 2005 MODEL 721 62222 721 62229...

Page 2: ...per alignment integrity and connections d Any defective or misadjusted components in the interlock monitor door seal and microwave generation and transmission systems shall be repaired repaired or adj...

Page 3: ...tment Procedures 3 2 Precautions on Installation 5 3 General Precautions in Use 5 4 Trial Operation 5 5 Specifications 6 6 Overall Circuit Diagram 7 9 7 Operating Procedures 10 12 8 Procedure for Meas...

Page 4: ...step 3 and follow all steps in order ADJUST THE LATCH AND SWITCH CLOSING 3 Loosen the two screws holding the plastic latch board as shown 4 With the oven door closed tightly move the latch board upwar...

Page 5: ...4 LATCH BOARD MONITOR INTERLOCK SWITCH PRIMARY INTERLOCK SWITCH SECONDARY INTERLOCK SWITCH LATCH LATCH BOARD 0 1 64 0 1 64 A B DOOR LATCH Figure 1 a Figure 1 b...

Page 6: ...avity light comes on The unit will begin cooking and the display window will show the time counting down by seconds E After about 5 minutes make sure the primary interlock switch the secondary interlo...

Page 7: ...y Interlock Switch Interlock Monitor Magnetron 2M246 050GF High Voltage Capacitor Capacitor 0 95 F 2 1KV Ac High Voltage Diode 350mA 9 0KV Cavity Lamp 125V 20W Timer Digital up to 99 mm 99 sec in each...

Page 8: ...6 OVERALL CIRCUIT DIAGRAM A I SCHEMATIC DIAGRAM Check the Model No 7...

Page 9: ...8 A II SCHEMATIC DIAGRAM Check the Model No ADD Noise filter...

Page 10: ...9 B MATRIX CIRCUIT FOR TOUCH KEY BOARD Figure 4...

Page 11: ...7 OPERATING PROCEDURES A OVEN CONTROL PANEL NOTE A beep sounds when you touch a key on the control panel to indicate that you have entered a setting 10 Figure 5 1 7 8 10 9 11 4 5 6 2 3...

Page 12: ...s 4 NUMBER PADS Touch Number Pads to enter cooking time power level quantities or weights 5 COOK TIME Touch this pad to set a cooking time 6 STOP CLEAR Touch this pad to stop the oven or clear entries...

Page 13: ...time 4 Touch POWER 5 Touch number for cooking power level 6 Touch START 6 MULTI STAGE COOKING 1 Touch STOP CLEAR 2 Touch COOK TIME 3 Touch numbers for cooking time 4 Touch POWER 5 Touch number for coo...

Page 14: ...q And always start measuring of an unknown field to assure safety for operating personnel from radiation leakage NOTE The standard is 5mW cm sq while in the customer s home 1mW cm sq stated here is ma...

Page 15: ...information on the service invoice 2 Should the microwave energy leakage not be more than 1mW cm sq after determining that all parts are in good condition functioning properly and genuine replacement...

Page 16: ...s 8 1 Remove three screws from the rear section 2 Remove one screw from the side section 3 Push the outer case back about 1 inch 3cm 4 Lift the case from the set B REMOVING POWER AND CONTROL CIRCUIT B...

Page 17: ...mary switch monitor switch and secondary switch operate normally 2 After replacing the door check for microwave energy leakage with a survey meter Microwave energy must be below the limit of 5 mW cm s...

Page 18: ...eter around the magnetron Microwave energy must be below the limit of 5 mW cm2 With a 275 ml water load Make sure that gasket is rigidly attached to the magnetron To prevent microwave leakage tighten...

Page 19: ...e the two screws holding the fan motor assembly to the suction guide ass y G HIGH VOLTAGE TRANSFORMER REMOVAL 1 Discharge the high voltage capacitor 2 Disconnect the wire lead from the magnetron the h...

Page 20: ...CHANISM The door lock mechanism is a device which has been specially designed to eliminate completely microwave activity when the door is opened during cooking and thus to prevent the danger resulting...

Page 21: ...6 FA 63 OR VP 533A OF FOR SECONDARY SWITCH B SECONDARY INTERLOCK SWITCH TEST Disconnect the wire lead from the secondary switch Connect the ohmmeter leads to the common COM and normally open NO termin...

Page 22: ...VEN HIGH VOLTAGE TRANSFORMER Wire leads removed MAGNETRON Wire leads removed 1 Measure the resistance Select the scale on the meter Primary winding Secondary winding Filament winding 2 Measure the res...

Page 23: ...the items as illustrated in figures Terminal to terminal Terminal to case Check for continuity of relay 2 with an ohm meter Remove wire leads from relay 2 and operate the unit POWER LEVEL 1 2 3 4 5 6...

Page 24: ...2 This has the positive side of the battery connected to the cathode of the diode 3 The diode should be forward biased therefore a voltage reading of approximately 4 7 VDC to 6 4 VDC will be read dep...

Page 25: ...WITH 20 AMPERE FUSE NOTES If the fuse is blown by an improper switch operation replace the defective switches and the fuse at the same time After replacing the defective switches with new ones make su...

Page 26: ...ector of I O CON from the circuit board Does the unit still operate Replace the circuit board NO YES NO PROBLEM B FAN motor and oven lamp turn on When the door is closed and START key is touched GOOD...

Page 27: ...ormal relay continuously operates 3 The buzzer does not sound or continues to sound NOTE A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON 4 Some segmen...

Page 28: ...charge any static charge built up in your body Micom model only 27 CONDITION Microwave oven does not work Inserting many plugs into one outlet and using them at the same time blown fuse or breaker Mic...

Page 29: ...me while counting down 9 Display counts down too fast while cooking 10 Each indicator light does not turn on after setting cooking cycle 11 Display time of day does not reappear when cooking is finish...

Page 30: ...No continuity Normal Defective high voltage capacitor Replace high voltage capacitor Fuse blows again Defective high volt age transformer Replace high volt age transformer Malfunction of the monitor s...

Page 31: ...Replace oven lamp Loose connection Connect them tightly CONDITION CHECK RESULT CAUSE REMEDY Output is low Lower than 90 of rating voltage Normal Normal Abnormal Abnormal Measure the output power Disco...

Page 32: ...capacitor Replace high voltage capacitor Check high vol tage capacitor Abnormal Defective magnetron Replace magnetron Check magnetron TROUBLE 5 No microwave oscillation even though oven lamp and fan m...

Page 33: ...32 DOOR PARTS CONTROL PANEL PARTS BASE PLATE PARTS OVEN CAVITY PARTS LATCH BOARD PARTS INTERIOR PARTS EV EXPLODED VIEW INTRODUCTION Model 721 62222300 721 62222301 721 62229300 721 62229301...

Page 34: ...33 1003 1001 1000 1006 1007 1004 1005 1013 1002 EV DOOR PARTS...

Page 35: ...34 2000 2002 2001 2381 2006 W106 2003 2005 2007 2004 2010 EV CONTROL PANEL PARTS...

Page 36: ...35 W103 3001 3003 W107 3002 3009 W105 3034 3008 For Model 721 62229 For Model 721 62222 W118 EV OVEN CAVITY PARTS...

Page 37: ...36 4003 4000 4002 4002 W102 EV LATCH BOARD PARTS...

Page 38: ...012 W109 W101 5007 5001 5016 5014 5005 W101 5010 5009 3006 Check the Model No Check the Model No Check the Model No Check the Model No 9000 EV INTERIOR PARTS I Model 721 62222300 721 62229300 Check th...

Page 39: ...041 5012 W109 W208 5007 5001 5016 5014 W101 5010 5009 3006 Check the Model No Check the Model No Check the Model No Check the Model No 9000 EV INTERIOR PARTS II Model 721 62222301 721 62229301 Check t...

Page 40: ...39 W101 6002 W109 W108 5008 6000 6001 9001 EV BASE PLATE PARTS...

Page 41: ...P NO 3828W5S5230 Printed in Korea...

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