Manuals / Kenmore / Kitchen Appliance / Microwave Oven

Kenmore 721.805934, 721.805944, 721.805924, 721.626434, 721.626424, 721.626494 C. Trouble Shooting

Models: 721.626444 721.805994 721.626494 721.626424 721.626434 721.805924 721.805934 721.805944

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C. TROUBLE SHOOTING

Before following this troubleshooting read “TRIAL OPERATION” on page 6- 1.

• “DISPLAY” Problems, “A” thru “C”
• “HELP UP” Problems, “D” thru “E”	• “BUZZER Problems, “F”

PROBLEM - A: “PLEASE SET TIME OF DAY” does not appear in display window when power supply cord is plugged into wall outlet.

1Check: 1. POWER SUPPLY

2.FUSE (See “CHECKOUT PROCEDURES FOR FUSE BLOWING: on page 7- 18)

3.OVEN CAVITY THERMOSTAT

PROBLEM - B: Display does not show correct numbers and/ or correct indications when programmed.

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Kenmore 721.805934, 721.805944, 721.805924, 721.626434, 721.626424, 721.626494, 721.805994, 721.626444 manual C. Trouble Shooting

Contents

March DIVISION BASIC FIELD MANUAL FOR MICROWAVE OVENPRECAUTIONS TO BE OBSERVED BEFORE AND SAFETY PRECAUTIONSDURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGYTABLE OF CONTENTS FOREWORDSPECIFICATIONS MICROWAVE RADIATION CAUTIONSMAGNETRON GasketINSTALLATIONS PRECAUTIONS ON INSTALLATIONGROUNDING INSTRUCTIONS OPERATING INSTRUCTIONS CONTROL PANEL4 5 7 8 10 13 14 16 17 18 20 CONTROL PANEL INSTRUCTIONS 27. FanOn/Off. Touch this pad to turn the fan on or SCHEMATIC DIAGRAM I *Check the Model No OVERALL CIRCUIT DIAGRAMRY1 O.L RY11 V.M RY14 C.L HIGH RY15 C.L NIGHT RY6 MATRIX CIRCUIT FOR TOUCH KEY BOARD GENERAL PRECAUTIONS IN USE GENERAL INFORMATION FOR SERVICEFEATURES AND SPECIFICATIONS FEATURES A. Never operate the unit when it is emptyPRECAUTIONS AND REPAIR SERVICE TIPS SERVICE INFORMATIONCAUTIONS MICROWAVE LEAKAGE TESTEQUIPMENT MEASURING MICROWAVE ENERGY LEAKAGENOTE WHEN MEASURING POWER OUTPUT MEASUREMENTMEASUREMENT WITH THE OUTER CASE REMOVED MEASUREMENT WITH A FULLY ASSEMBLED OVENIMPORTANT NOTES DISASSEMBLY INSTRUCTIONSHOW TO INSERT THE F.P.C. CONNECTOR HOW TO REMOVE THE F.P.C. CONNECTORFigure Figure Figure FigureB. REMOVING THE OUT CASEFigure Latch Board Secondary Interlock Switch Interlock Monitor Switch Primary Interlock Switch2Remove two screws securing the Latch Board D. REMOVING MAGNETRON F. DISASSEMBLING DOOR Figure E. REMOVING DOOR FigureG. ASSEMBLING DOOR H. REMOVING THE VENTILATION FAN ASSYFigure Figure Figure Figure Figure I. REMOVING THE TURNTABLE MOTORADJUSTMENT PROCEDURES INTERLOCK SYSTEMCHECK THE DOOR LATCH AND SWITCH CLOSING ADJUST THE LATCH AND SWITCH CLOSINGTEST THE MICROWAVE ENERGY LEAKAGE TEST THE LATCH AND SWITCH SEQUENCEB. SECONDARY INTERLOCK SWITCH TEST A. PRIMARY INTERLOCK SWITCH TESTC. MONITOR SWITCH TEST INTERLOCK CONTINUITY TESTA. TEST PROCEDURES TEST AND CHECKOUT PRECEDURES AND TROUBLESHOOTINGTEST PROCEDURES CAUTIONSCOMPONENTS TEST PROCEDURESRESULTS Figure 25-aCOMPONENTS TEST PROCEDURESRESULTS Measure the resistance between terminalPROBLEMS TEST PROCEDUREScorrectly connected Relay CAUSESwhen the door is closed 2 CHECKOUT PROCEDURES FOR RELAY PROBLEM ADefective RELAY1 Replace RELAY1 PROBLEM B Oven lamp turn on When the door is closed andSome of the indicators do no flicker light up 3CHECKOUT PROCEDURES FOR CIRCUIT BOARDvoltage Systems, the interlock switches, the door Proper temperature measurement is not obtainedC. TROUBLE SHOOTING 2.THERMOSTAT stages or at end of cooking 1Check 1. POWER SUPPLY 2.FUSE DOOR PARTS EXPLODED VIEW1005 1004 1002 1000 For 1381FOR MODEL: CONTROLLER PARTS721.62643 #EV#W138 W142 W109 OVEN CAVITY PARTSW138 W142 3024 3003 054000 LATCH BOARD PARTS4002 W1023002 W101 3012 5009 W108 INTERIOR PARTSW105 W108Model 721.80592401 INTERIOR PARTS3027 5015INTERIOR PARTS Model3027 50156008 W109 INSTALLATION PARTSVINYL #EV#P/NO 3828W5S5158