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Maytag MMV6178AAB, Руководство по обслуживанию

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Microwave Oven
Service Manual

MMV6178AAB
MMV6178AAQ
MMV6178AAS
MMV6178AAW

CAUTION

BEFORE SERVICING THE UNIT, READ THE
SAFETY PRECAUTIONS IN THIS MANUAL.

Содержание MMV6178AAB

Страница 1: ...Microwave Oven Service Manual MMV6178AAB MMV6178AAQ MMV6178AAS MMV6178AAW CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL...

Страница 2: ...lignment 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 adjusted...

Страница 3: ...6 1 SERVICE INFORMATION 7 1 PRECAUTIONS AND REPAIR SERVICE TIPS 7 1 MICROWAVE LEAKAGE TEST 7 2 POWER OUTPUT MEASUREMENT 7 3 DISASSEMBLY INSTRUCTIONS 7 4 INTERLOCK SYSTEM 7 12 INTERLOCK CONTINUITY TEST...

Страница 4: ...n Cavity Thermostat Open at 145 C 6 C Fuse 20A Primary Interlock Switch Secondary Interlock Switch Interlock Monitor Magnetron 2M246 21CT High Voltage Capacitor Capacitor 1 0 F 2 1 KV AC High Voltage...

Страница 5: ...operation of the microwave oven requires that the magnetron be assembled to the waveguide and cavity Never operate the magnetron unless it is properly installed Be sure that the magnetron gasket is pr...

Страница 6: ...he 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 3 1 INSTALLATIONS BEFORE YOU BEGI...

Страница 7: ...4 1 OPERATING INSTRUCTIONS CONTROL PANEL For Model MMV6178AAB MMV6178AAQ MMV6178AAS MMV6178AAW...

Страница 8: ...weight combination cooking 13 AUTO BROIL Touch this pad when setting weight broil cooking 14 SOFTEN Touch this pad to soften Butter Ice Cream Cream Cheese or Frozen Juice 15 MELT Touch this pad to mel...

Страница 9: ...5 1 OVERALL CIRCUIT DIAGRAM SCHEMATIC DIAGRAM I Check the Model No For Model MMV6178AAB MMV6178AAQ MMV6178AAS MMV6178AAW...

Страница 10: ...he Model No ADD Noise filter DISPLAY ERROR MODE F1 THERMISTOR OPEN F2 THERMISTOR SHORT FOR COOKING F3 THERMISTOR SHORT AFTER COOKING F4 SENSOR OPEN F5 DAMPER SWITCH SENSING ERROR For Model MMV6178AAB...

Страница 11: ...5 3 MATRIX CIRCUIT FOR TOUCH KEY BOARD For Model MMV6178AAB MMV6178AAQ MMV6178AAS MMV6178AAW...

Страница 12: ...ight comes on The unit will begin cooking and the display window will show the time counting down by seconds D After about 5 minutes make sure the primary interlock switch the secondary interlock swit...

Страница 13: ...All 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 no...

Страница 14: ...crowave oven should not exceed 4 mW cm2 Always start measuring of an unknown field to assure safety for operating personnel from radiation leakage EQUIPMENT TESTER VOLTS DC AC Ohmmeter Microwave surve...

Страница 15: ...termining that all parts are in good condition functioning properly and genuine replacement parts which are listed in this manual have been used 3 At least once a year have the electromagnetic energy...

Страница 16: ...SWITCHES AND HIGH VOLTAGE CIRCUIT A REMOVING 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...

Страница 17: ...ONNECTOR Follow the steps below as illustrated in Figures 6 and 7 to insert the F P C connector 1 Insert the F P C connector into the terminal socket securely with the fingers 2 Hold the plastic faste...

Страница 18: ...e screws 1 or 2 screws securing it to the out case 4 Remove two screws on the left central edge and one screws on the right central edge of Base plate Remove the Mount All from the out case by removin...

Страница 19: ...d Primary Interlock Switch Interlock Monitor Switch Secondary Interlock Switch Latch Board BK CN1 RD Oven TCO RD H V Transformer WH from Convection Heater Primary Interlock Switch Monitor Interlock Sw...

Страница 20: ...s or it may be damaged When replacing the magnetron be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition After replacing the magnetron check...

Страница 21: ...at the primary interlock switch the secondary interlock switch and the interlock monitor switch is in good operating normally After replacing the door check for microwave energy leakage with a survey...

Страница 22: ...19 a 3 Carefully pull the ventilation motor ASS Y out of the microwave oven See Figure 19 b J REPLACING THE HUMIDITY SENSOR For sensor model only 1 Remove the sensor by removing two screws securing it...

Страница 23: ...r not the wires when removing M REMOVING CONVECTION HEATER AND THERMISTOR Figure 23 1 Remove the out case 2 Remove the air duct by removing six screws securing it to the oven front plate guide air and...

Страница 24: ...ent 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 Interl...

Страница 25: ...the body of the switches in the following sequence Interlock Monitor Switch Secondary Interlock Switch Primary Interlock Switch NOTE The Interlock Monitor Switch is an added safety check on the Primar...

Страница 26: ...ed circuit When 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...

Страница 27: ...MER Wire leads are removed 1 Remove wire leads Install the magnetron seal in the correct position Check that the seal is in good condition 2 Measure resistance ohm meter scale Rx1 Filament terminal 3...

Страница 28: ...ohm meter scale Rx1000 Ohm meter 1 Measure continuity Reverse ohm meter scale Rx1000 Ohm meter 1 Remove wire leads 2 Measure resistance ohm meter scale Rx1 Normal Momentarily indicates several ohm and...

Страница 29: ...lastic fastener MATRIX CIRCUIT FOR TOUCH KEY BOARD CONNECTOR KEY CON 1 Remove the 3 pin connector from PCB 2 Measure resistance across pins 1 2 3 Across pins 2 3 ohm meter scale Rx1 Normal Approximate...

Страница 30: ...ale Rx1 1 Remove wire leads 2 Measure resistance ohm meter scale Rx1000 1 Remove the connector from PCB 2 Measure resistance across pins 1 3 ohm meter scale Rx1 Normal Approximately Abnormal Infinite...

Страница 31: ...the interlock monitor switches are adjusted or replaced 7 19 COMPONENTS TEST PROCEDURES RESULTS RELAY 8 RELAY 10 11 1 Measure continuity ohm meter scale Rx1 2 Remove the lead wires and operate oven at...

Страница 32: ...l operate Replace the circuit board Replace RELAY1 NO NO YES YES GOOD Defective RELAY1 PROBLEM B FAN motor and oven lamp turn on When the door is closed and START key is touched Measure the voltage at...

Страница 33: ...perates 3 Proper temperature measurement is not obtained 4 The buzzer does not sound or continues to sound 5 Some segments of one or more digits do not light up or they continue to light up or segment...

Страница 34: ...ru 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 PROBLEM B Display does not show correct numbers and or corr...

Страница 35: ...M C Display does not start countdown when START key is touched Check 1 TOUCH KEY BOARD START KEY FUNCTION Check 1 AIR VENTS 1 1 PROBLEM D Unit operation seems to be normal but no heating is produced i...

Страница 36: ...7 24 PROBLEM E Unit does not heat up even if display counts down when START key is touched for HIGH POWER cooking Check 1 PRIMARY AND SECONDARY INTERLOCK SWITCHES 2 THERMOSTAT 1 2...

Страница 37: ...7 25 PROBLEM F No buzzing when touching the key between stages or at end of cooking 1...

Страница 38: ...7 26 PROBLEM G Ventilation fan does not operate when FAN HIGH LOW key is touched 1 Check 1 POWER SUPPLY 2 FUSE...

Страница 39: ...1007 1012 1008 1003 1381 1000 1008 1004 W106 1009 W105 1019 1011 1007 1006 1012 1009 W105 1019 EXPLODED VIEW DOOR PARTS FOR MODEL MMV6178AAB MMV6178AAQ MMV6178AAW FOR MODEL MMV6178AAS Serial Number l...

Страница 40: ...06 2008 2018 W130 W105 W138 2008 2018 Check the Serial No Check the Serial No CONTROLLER PARTS FOR MODEL MMV6178AAB MMV6178AAQ MMV6178AAW FOR MODEL MMV6178AAS Check the rating label of Model and order...

Страница 41: ...06 2006 2008 W130 W105 W138 2008 Check the Serial No Check the Serial No CONTROLLER PARTS FOR MODEL MMV6178AAB MMV6178AAQ MMV6178AAW FOR MODEL MMV6178AAS Check the rating label of Model and order SVC...

Страница 42: ...08 W108 3031 3001 3103 3029 3005 W178 W202 3024 3010 W138 W138 W142 For Model MMV6178AAB MMV6178AAS For Model MMV6178AAW MMV6178AAQ W142 3026 3011 3025 W121 3006 3032 W105 3009 3045 3037 6000 OVEN CAV...

Страница 43: ...8 5 EV 4001 4000 4002 W111 4003 4002 4004 LATCH BOARD PARTS...

Страница 44: ...52 5007 W101 W109 5035 W101 5404 4009 W121 5068 W105 5705 5019 W123 W123 5409 3008 3204 5701 5024 5062 5407 W125 W124 W124 W141 W141 5403 3206 3207 5021 5029 5049 5008 W109 W109 W109 5023 W121 W121 W1...

Страница 45: ...5011 3033 5037 3027 5410 W150 5016 3051 5006 5010 5001 5017 W105 5014 W101 W109 W150 W109 W109 Check the Serial No Check the Serial No INTERIOR PARTS II I Check the rating label of Model and order SV...

Страница 46: ...37 3027 5410 W150 5016 3051 5006 5010 5001 5041 W144 5014 W101 2018 W109 W150 W109 W109 Check the Serial No Check the Serial No Check the Serial No INTERIOR PARTS II II Check the rating label of Model...

Страница 47: ...8 9 EV VINYL BAG 6011 6009 6010 6008 INSTALLATION PARTS...

Страница 48: ...Printed in Korea P NO 3828W5S4605...

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