Sears 721. 63762 Скачать руководство пользователя страница 35

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7-24

(TROUBLE 4) Oven seems to be operating but little heat is produced in oven load.

NOTE : Simple test of power output-conducted by heating one liter water for one min. if available.

Minimum 8.5°C temperature rise is normal condition.

CONDITION

CHECK

RESULT

CAUSE

REMEDY

Output is low

Lower than 90% of
rating voltage.

Normal

Defective
Magnetron.

Replace
Magnetron.

Decrease in power
source voltage
with load.

Suggest customer
contact local
electric power
utility co. or
qualified
electrician.

Check the
power source
voltage.

CONDITION

CHECK

RESULT

CAUSE

REMEDY

4. The display

shows F-4.

Abnormal

Normal

Loose connection.

Connect them
tightly.

Check the
connection between
sensor wire and
control PCB.

Abnormal

Normal

Defective sensor.

Replace sensor.

Check the sensor.

Defective Control
PCB assembly.

Replace PCB
assembly.

Содержание 721. 63762

Страница 1: ...DIVISION 22 BASIC FIELD MANUAL FOR MICROWAVE HOOD COMBINATION MODEL 721 63762 721 63763 721 63764 721 63769 FEBRUARY 2003 MODEL 721 63762 721 63763 721 63764 721 63769...

Страница 2: ...oper 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 replaced or ad...

Страница 3: ...FOR TOUCH KEY BOARD 5 2 GENERAL INFORMATION FOR SERVICE 6 1 GENERAL PRECAUTIONS IN USE 6 1 TRIAL OPERATION 6 1 FEATURES AND SPECIFICATIONS FEATURES 6 1 SERVICE INFORMATION 7 1 PRECAUTIONS AND REPAIR S...

Страница 4: ...r P1 1019 120 V Magnetron 2M261 Cook top Lamp 120 V 20 W Halogen Cavity Lamp 125 V 20 W Halogen Timer Digital up to 99 min 99 sec in each cooking stage Tray Tempered Safety Glass Overall Dimensions 29...

Страница 5: ...operate the magnetron unless it is properly installed Be sure that the magnetron gasket is properly installed around the dome of the tube whenever installing the magnetron Unlike other appliances the...

Страница 6: ...unded at all times In the event of an electrical short circuit grounding reduces the risk of electrical shock The plug must be plugged into an outlet that is properly installed and grounded BEFORE YOU...

Страница 7: ...wave oven control panel lets you select the desired cooking function quickly and easily All you have to do is touch the necessary Command Button The following is a list of all the Command and Number B...

Страница 8: ...Warm can be used by itself or it can automatically follow a cooking cycle 13 Add Minute Touch this button to cook for 1 minute at 100 cook power or to add extra minutes at the set cook power to your c...

Страница 9: ...5 1 SCHEMATIC DIAGRAM OVERALL CIRCUIT DIAGRAM...

Страница 10: ...5 2 MATRIX CIRCUIT FOR TOUCH KEY BOARD...

Страница 11: ...seconds D After about 5 minutes make sure the primary interlock switch the secondary interlock switch and the interlock monitor switch operate properly by opening and closing the door several times To...

Страница 12: ...ll service adjustments should be made for minimum microwave energy leakage readings 3 Do not operate the unit until it is completely repaired if any of the following conditions exist The unit must not...

Страница 13: ...ity of the microwave radiation leakage emitted by the microwave oven should not exceed 1mW cm sq And always start measuring of an unknown field to assure safety for operating personnel from radiation...

Страница 14: ...e been used 3 At least once a year have the electromagnetic energy leakage monitor checked for calibration by its manufacturer 1 Microwave power output measurement is made with the microwave oven supp...

Страница 15: ...NG POWER AND CONTROL CIRCUIT BOARD Figures 1 2 and 3 1 Remove a screw securing the control panel assembly to the oven cavity 2 Remove the control panel with pushing it upward 3 Remove the connectors C...

Страница 16: ...ws on the left central edge and three screws on the right central edge of Base plate Remove the Mount All from the out case by removing one screw securing it to the out case 5 Remove six screws of the...

Страница 17: ...11 Latch Board Secondary Interlock Switch Interlock Monitor Switch Interlock Switch Primary Latch Board WH from Inverter YL from Turntable Motor PK from Cooktop lamp BL from Oven Thermostat Secondary...

Страница 18: ...vice adjustments should be made for minimum microwave energy leakage readings E REMOVING THE INVERTER MODULE Figures 13 Through 15 1 Remove the vent grille by loosening two screws Figure 11 2 Remove t...

Страница 19: ...DISASSEMBLING DOOR Figure 19 1 Remove the dielectric choke by using knife blade or small screw driver etc 2 Remove two screws securing it to the door handle CAUTION Be careful not to damage door seal...

Страница 20: ...es may leak from the clearance between the door and the oven J REMOVING THE VENTILATION MOTOR 1 Remove the mounting plate by loosening mounting plate screws 1 or 2 screws securing it to the back plate...

Страница 21: ...rews securing it to the oven cavity Figure 23 4 Disconnect the leadwire from the turntable motor terminals 5 Remove the 1 screws securing the turntable motor to the oven cavity ASS Y Figure 24 NOTES R...

Страница 22: ...ustment of the latch board may not be necessary Go to Steps 5 and 6 to check the sequence of the switches NOTE To correct sequence of the Primary Interlock Switch Secondary Interlock Switch and the In...

Страница 23: ...o to the body of the switches in the following sequence Interlock Monitor Switch Primary Interlock Switch Secondary Interlock Switch NOTE The Interlock Monitor Switch is an added safety check on the P...

Страница 24: ...hen the secondary switch operation is abnormal make the necessary adjustment or replace the switch only with the same type of switch C MONITOR SWITCH TEST Disconnect the wire lead from the monitor swi...

Страница 25: ...emoved MAGNETRON Lead wires removed Note Do not try to repair the inverter board nor try to make any adjustments to the board Check wiring to the inverter 1 Unplug the oven s main power supply 2 Visua...

Страница 26: ...dry 4 The oven will not generate microwave energy for the first 28 seconds of the sensor cooking cycle 1 Disconnect sensor connector from micom computer board 2 Measure resistance terminal to termina...

Страница 27: ...150 ohms Abnormal Infinite or several ohms A B 76 ohms B C 22 ohms A C 96 ohms Normal Approx 2 4K ohms Abnormal Infinite or several ohms A RD B BK C WH Relay 2 Normal Approx 125 to 135 ohms Abnormal...

Страница 28: ...s touched Improper operation of the primary interlock secondary interlock switches and or the interlock monitor switch Malfunction of the high voltage transformer the high voltage capacitor including...

Страница 29: ...place the circuit board Defective FAN motor Defective Wire Assembly Replace FAN motor NO NO YES YES NO NO YES YES GOOD PROBLEM A Oven lamp turns on without touching START key when the door is closed R...

Страница 30: ...ut current is less than 0 5 A there is no input to the inverter 2 The start function fails to operate but the high voltage Systems the interlock switches the door sensing and the relay check good 3 Th...

Страница 31: ...ontrol panel Always touch yourself to ground while working on this panel to discharge any static charge built up in your body Micom model only CONDITION Microwave oven does not work Inserting many plu...

Страница 32: ...after setting cooking cycle 11 Display time of day does not reappear when cooking is finished TROUBLE 1 The following visual conditions indicate a probable defective control circuit CONDITION CHECK RE...

Страница 33: ...fuse primary monitor switches and P C B Assembly Check continuity of monitor switch with door closed Check continuity of primary switch with door opened Disconnect one side of the lead wires connected...

Страница 34: ...en CN1 connector and control PCB assembly TROUBLE 3 Display shows all figures set but oven does not start cooking while desired program times are set and START pad is touched 3 The display shows F 9 N...

Страница 35: ...ng voltage Normal Defective Magnetron Replace Magnetron Decrease in power source voltage with load Suggest customer contact local electric power utility co or qualified electrician Check the power sou...

Страница 36: ...8 1 EXPLODED VIEW DOOR PARTS 1000 1004 1005 1008 1003 W109 W109 1011 1009 1015 1381 1007 1006 W171 1002 EV MODEL...

Страница 37: ...8 2 CONTROLLER PARTS I 1001 W171 W171 2016 2009 2007 2017 EV...

Страница 38: ...2004 2008 2002 2006 W106 2381 8 3 CONTROLLER PARTS II EV...

Страница 39: ...9 W121 W107 W138 W142 W138 W142 3024 3040 3042 3029 3003 3036 3018 3041 3005 W150 6000 3032 W149 3026 5036 W121 W142 3001 3039 W142 3033 For Model For Model For Model For Model W107 W121 W108 5382 OVE...

Страница 40: ...8 5 LATCH BOARD PARTS 4000 W102 4001 4002 4003 4002 4004 EV...

Страница 41: ...3002 5026 5049 5025 5003 5057 5012 5009 5052 5000 3007 5044 3009 W105 3004 5035 3008 3017 W109 W109 W109 W109 W101 W109 W109 W109 W109 W130 W146 W101 5066 5048 5024 3054 8 6 INTERIOR PARTS I EV...

Страница 42: ...TS II 5011 3027 5001 5016 5029 5006 5014 5010 5064 5065 W144 W150 W150 5027 W109 5019 5041 W140 W140 W178 5045 5382 5800 W202 5056 5037 Discord original for parts supplied Change pieces simultaneously...

Страница 43: ...8 8 INSTALLATION PARTS 6008 6011 6010 VINYL BAG 6009 MBM3 TEMPLATE MEZ1 COOKING GUIDE LABEL MFL1 OWNERS MANUAL TECHNICAL CARD MBM2 MFL3 INSTALLATION MANUAL EV...

Страница 44: ...8 21 SCHEMATIC DIAGRAM OF P C B...

Страница 45: ...8 22 PRINTED CIRCUIT BOARD...

Страница 46: ...P NO 3828W5S2945 Printed in Korea...

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