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Troubleshooting Procedures

!

WARNING

To avoid risk of electrical shock, personal injury, or death, disconnect power to microwave and discharge
capacitors before servicing, unless testing requires power.

©2005 Maytag Services

16026440 11

Symptom Cause

Correction

Fan motor engages
when microwave is
plugged in.

1. Door sensing switch wiring loose.
2. Door sensing switch wiring broken.

Repair loose wire.
Repair broken wire.

Oven does not operate
and return to standby.

1. Defective PCB assembly.

Replace main PCB.

Microwave emitting a
loud buzzing noise.

1.  Loose fan and/or fan motor.
2.  Screws loose on high voltage transformer.
3.  High voltage diode shorted.

Tighten screws on fan motor
and/or high voltage transformer.
Replace high voltage diode.

Turntable motor does
not rotate.

1. Turntable motor wiring open or loose.
2. Turntable motor defective.

Replace turntable motor.

Microwave stops
operation during
cooking.

1. Primary interlock switch wiring open or loose.
2. Thermal cutout engaged.

Adjust door latch and switches.
Wait for microwave to cool.

Microwave emits sparks.

1. Metallic ware or cooking dishes touching wall.
2. Ceramic ware trimmed with gold/silver powder.

Do not use cookware with
metallic trimming.

Uneven cooking.

1. Uneven intensity of microwave due to

microwave characteristics.

Use plastic wrap or cover with
lid.
Stir food once or twice while
cooking.

Turntable emits noise
when operational.

1. Turntable motor.

Replace turntable motor.

Checkout Procedure: Circuit Board

PROBLEM CAUSE

The START function fails to operate, but the high voltage
systems, interlock/monitor switches and door sensing/relays
all test good.
Proper temperature is not obtained.
Buzzer does not sound or sounds continuously.
Some segments of 1 or more digits display on the touch
panel, or display when they should not.

Defective Control Printed Circuit Board Assembly

NOTE:

Check for microwave energy leakage after replacing Printed Circuit Board Assembly.

Checkout Procedure: Fuse

PROBLEM CAUSE

Fuse blows immediately after door is closed.
Fuse blows immediately after door is opened.

Improper operation of the primary interlock and secondary
interlock switches and/or interlock monitor switch.

Fuse blows when door is closed and

START

key is touched.

Malfunction of high voltage transformer; high voltage capacitor
including diode, magnetron, blower motor or circuit board.

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Содержание JMV8186AA Series

Страница 1: ...fic models This manual includes but is not limited to the following UMV2186AA JMV8186AA Service This manual is to be used by qualified appliance technicians only Maytag does not assume any responsibility for property damage or personal injury for improper service procedures done by an unqualified person 16026440 July 2005 2005 Maytag Services ...

Страница 2: ...sure to electrical shock may result CAUTION Maytag will not be responsible for any injury or property damage from improper service procedures If performing service on your own product assume responsibility for any personal injury or property damage which may result To locate an authorized servicer please consult your telephone book or the dealer from whom you purchased this product For further ass...

Страница 3: ...er 17 Cooktop Lights 17 Oven Light 17 Door Assembly 17 Door Removal 17 Door Disassembly 18 Control Panel 18 Control Panel Removal 18 P C Board 18 P C Board Removal 18 Control Key Panel 19 Control Key Panel Removal 19 Outer Case 19 Stirrer Assembly 19 Stirrer Fan Removal 19 Stirrer Motor Removal 20 Interlock Door Latch Switches 20 Interlock Monitor Switch Removal 20 Adjusting Interlocks 20 High Vol...

Страница 4: ...e discharge could cause a reflex action which could make you injure yourself 7 In the area of the transformer capacitor diode and magnetron there is HIGH VOLTAGE When the unit is operating keep this area clean and free of anything which could possibly cause an arc or ground etc 8 Do not for any reason defeat the interlock switches There is no valid reason for this action at any time nor will it be...

Страница 5: ...or 4mW cm2 or less 1 Pour 275 15 cc 9 oz 1 2 oz of 20 5 C 68 9 F water in a beaker which is graduated to 600 cc and place the beaker in the center of oven 2 Set the radiation monitor to 2450 MHz and use it following the manufacturer s recommended test procedure to assure correct results 3 While measuring the leakage always use the two inch 5 cm spacer supplied with the probe 4 Press the start pad ...

Страница 6: ...authorized service technicians Cooking Nomenclature J M V 8 1 8 6 A A W Brand A Amana C Magic Chef G Graffer Sattler H Hardwick J Jenn Air M Maytag N Norge U Universal Y Crosley Product Type A Accessory Cartridge C Cooktop Updraft Countertop D Downdraft Cooktop or Warming Drawer E Eyelevel Range G Grill L Range 20 M Range 36 P Drop In 24 Q Wall Oven 27 R Range Free Standing 30 S Slide In 30 T Rang...

Страница 7: ...ss ___________________ Service Keep a copy of sales receipt for future reference or in case warranty service is required To locate an authorized servicer Jenn Air product call 1 800 462 9824 or visit the Web Site at www jennair com For product in Canada call 1 866 587 2002 or visit the Web Site at www jennair com Warranty service must be performed by an authorized servicer We also recommend contac...

Страница 8: ...to the operating parts inside the oven the water should not be allowed to seep into the ventilation openings After cleaning the oven be sure that the rotating ring and the glass tray are in the right position Press the STOP CLEAR pad twice to reset any accidental key setting Grounding Instructions This appliance must be grounded If an electrical short circuit occurs grounding reduces the risk of e...

Страница 9: ...5 Maytag Services 16026440 9 General Information Microwave Oven Description Safety Interlock Holes Control Panel Ventilation Holes Oven Light Grill Door Handle Intake Holes Guide Roller Glass Tray Door Key ...

Страница 10: ...tinuity of power relay contacts If continuity is indicated replace power relay NOTE 2 When high voltage transformer is replaced also check diode and magnetron Cannot program microwave will not accept key input 1 Key input sequence incorrect 2 Open or loose membrane keypad connection 3 Open or shorted membrane panel 4 Defective PCB assembly Refer to Use and Care Guide for microwave operation Replac...

Страница 11: ...are or cooking dishes touching wall 2 Ceramic ware trimmed with gold silver powder Do not use cookware with metallic trimming Uneven cooking 1 Uneven intensity of microwave due to microwave characteristics Use plastic wrap or cover with lid Stir food once or twice while cooking Turntable emits noise when operational 1 Turntable motor Replace turntable motor Checkout Procedure Circuit Board PROBLEM...

Страница 12: ...r Mode E61 Sensor open unplugged wiring or smart board E62 Sensor shorted unplugged wiring or smart board NOTES Replace blown fuse with 20 Amp fuse If the fuse is blown due to an improper switch operation replace all interlock switches PCB Assembly and the fuse simultaneously and ensure they are connected properly Check for microwave energy leakage after replacing interlock and monitor switches Bo...

Страница 13: ...rminal to ground Infinite resistance Note This test is not conclusive If oven does not heat and all other components test good replace the magnetron and retest High voltage capacitor Discharge Capacitor Remove wires from capacitor terminals and connect ohmmeter to terminals set on highest resistance scale Also check between each terminal and capacitor case Between Terminals Meter indicates continu...

Страница 14: ...ceptacle terminals Indicates continuity if bulb is good and installed Turntable drive motor Synchronous motor Measure voltage across terminals Measure resistance across terminals Approximately 120 VAC Approximately 120 Ω Stirrer motor Synchronous motor Measure voltage across terminals Measure resistance across terminals Approximately 120 VAC Approximately 120 Ω Louvre motor Synchronous motor Measu...

Страница 15: ...hed Less than 400 Ω When not touched More than 1 mega Ω Pad 0 1 2 3 4 5 6 7 8 9 Vent Help Cancel Power Clock AM PM Handy Helper Kids Meal Snack Bar Start Auto Defrost Custom Cook Kitchen Timer Turntable Option Auto Night Light Reheat Add 30 Vent Auto Time Set Rapid Defrost Light Popcorn Potato Beverage Fresh Vegetable Frozen Vegetable Frozen Breakfast Frozen Dinner Chicken Breast Pizza Reheat Opti...

Страница 16: ...al to perform the IEC test in the field To convert the traditional power test results to the approximate IEC 705 rating take the traditional power test results and add 100 watts per magnetron for the unit being tested Example 850 watts output using the traditional power test 100 watts 1 magnetron X 100 watts 950 Approximate IEC 705 results Always perform power test three times for accuracy changin...

Страница 17: ...ure 2 Slide charcoal filter toward the front to remove 3 Replace and reassemble in reverse order Cooktop Lights The cooktop lights are located on the bottom of the microwave 1 Remove power from microwave 2 Remove screw securing access cover to chassis 3 Lower access cover to gain access to lights halogen lamps 20 watts 120 volts 4 Replace and reassemble in reverse order Oven Light The oven light i...

Страница 18: ...hooks on the plastic fastener Door Disassembly 1 Disconnect power from microwave and remove oven door see Door Removal procedure 2 Pry away choke cover by placing a tool in the upper right corner of the door and gently prying outward on the choke cover Continue to work around the door casing until choke cover is completely loose CAUTION To avoid property damage care must be taken when prying choke...

Страница 19: ...bbon cable has two holes which connector locks ribbon in place 5 Peel failed key pad off and replace with new key pad 6 Reassemble in reverse order Outer Case NOTE This procedure requires removal of unit 1 Disconnect power to microwave 2 Remove oven door see Door Removal procedure 3 Remove screws securing air duct to outer case 4 Remove screws securing outer case to chassis 5 Remove screws securin...

Страница 20: ...is blown by a failed switch operation all switches and printed circuit board must be replaced Adjusting Interlocks The interlock monitor and primary switches act as a final safety switch protecting the operator from microwave energy After adjusting the interlock switches verify connections are correctly connected NOTE For door fit and switch operation switch housing is adjustable 1 Disconnect powe...

Страница 21: ...dure 3 Remove control panel see Control Panel procedure 4 Discharge high voltage capacitor see High Voltage Capacitor procedure 5 Label and disconnect wire leads from transformer 6 Remove screws securing right side of microwave ducting to chassis 7 Remove screws securing fan motor assembly and remove 8 Remove screws securing rear of microwave ducting to chassis and remove ducting 9 Remove screws s...

Страница 22: ...rews securing magnetron to the wave guide 8 Carefully remove the magnetron NOTE When replacing magnetron ensure the antenna does not strike against other components which may damage the magnetron antenna 9 Reassemble in reverse order NOTE When replacing magnetron ensure the gasket is in the correct position and in good condition CAUTION During replacement of magnetron be certain the R F anode gask...

Страница 23: ...rill Assembly procedure 3 Remove control panel see Control Panel procedure 4 Remove outer case see Outer Case procedure 5 Discharge high voltage capacitor see High Voltage Capacitor procedure 6 Remove screw securing the base plate cutout to gain access to the thermal cutout 7 Label and disconnect thermal cutout wire connections 8 Reassemble in reverse order Bottom Thermal Cutout The bottom thermal...

Страница 24: ...crowave 2 Remove grill assembly see Grill Assembly procedure 3 Discharge high voltage capacitor see High Voltage Capacitor procedure 4 Remove screws securing sensor to chassis 5 Label and disconnect wire terminal plug and replace with new sensor 6 Reassemble in reverse order Low Voltage Transformer The high voltage transformer is located on the PCB assembly and supplies low voltage power to the mi...

Страница 25: ... 2005 Maytag Services 16026440 A 1 Appendix A ...

Страница 26: ...hs of duct pieces are based on actual tests and reflect requirements for good venting performance with any vent hood Total Length 41 Ft OUTSIDE BACK EXHAUST EXAMPLE ONLY The following chart describes an example of one possible ductwork installation NOTE For back exhaust care should be taken to align exhaust with space between studs or wall should be prepared at the time it is constructed by leavin...

Страница 27: ...valent feet Elbows transitions wall and roof caps etc present additional resistance to airflow and are equivalent to a section of straight duct which is longer than their actual physical size When calculating the total duct length add the equivalent lengths of all transitions and adaptors plus the length of all straight duct sections The chart below shows you how to calculate total equivalent duct...

Страница 28: ...and free of obstructions This microwave oven is for installation over ranges up to 36 wide If you are going to vent your microwave oven to the outside see Hood Exhaust Section for exhaust duct preparation When installing the microwave oven beneath smooth flat cabinets be careful to follow the instructions on the top cabinet template for power cord clearance ...

Страница 29: ... below the cabinet bottom as the inside depth of the front overhang 3 For this type of installation with front overhang only align the mounting tabs with this horizontal line not touching the cabinet bottom as described in Step D C L 16 1 2 Plate position beneath flat bottom cabinet At least 36 inches Draw a vertical line on the wall at the center of the 36 inchwide space Tape the Rear Wall Templa...

Страница 30: ...r wood screw In other words toggle bolt can not be used to the location of stud NOTE DO NOT MOUNT THE PLATE AT THIS TIME NOTE Holes A B and C are inside area E If none of A B and C is in a stud find a stud somewhere in area E and draw a forth circle to line up with the stud It is important to use at least one wood screw mounted firmly in a stud to support the weight of the microwave Set the mounti...

Страница 31: ...on Vented Ductless B Outside Top Exhaust Vertical Duct C Outside Back Exhaust Horizontal Duct NOTE This microwave is shipped assembled for Recirculating And exhaust adaptor is shipped assembled to the filler upper Select the type of ventilation required for your installation and proceed to that section RECIRCULATING NON VENTED DUCTLESS OUTSIDE TOP EXHAUST VERTICAL DUCT OUTSIDE BACK EXHAUST HORIZON...

Страница 32: ...e to coincide bottom line of the Mounting plate with Horizontal line of Rear wall Template and that the Mounting plate is properly centered under the cabinet CAUTION Be careful to avoid pinching fingers between the back of the mounting plate and the wall 4 Tighten all bolts Pull the plate away from the wall to help tighten the bolts USE TOP CABINET TEMPLATE FOR PREPARATION OF TOP CABINET You need ...

Страница 33: ... by pulling cord 3 Insert a self aligning screw through top center cabinet hole T emporarily secure the oven by turning the screw at least two full turns after the threads have engaged It will be completely tightened later Be sure to keep power cord tight Be careful not to pinch the cord especially when mounting flush to bottom of cabinet 4 Attach the microwave oven to the top cabinet 7 Tighten th...

Страница 34: ...te against the wall and insert the toggle wings into the holes in the wall to mount the plate NOTE Before tightening toggle bolts and wood screw make sure to coincide bottom line of the Mounting plate with Horizontal line of Rear wall Template and that the Mounting plate is properly centered under the cabinet CAUTION Be careful to avoid pinching fingers between the back of the mounting plate and t...

Страница 35: ...ructions of the REAR WALL TEMPLATE ATTACH THE MOUNTING PLATE TO THE WALL Attach the plate to the wall using toggle bolts At least one wood screw must be used to attach the plate to a wall stud 1 Remove the toggle wings from the bolts 2 Insert the bolts into the mounting plate through the holes designated to go into drywall and reattach the toggle wings to onto each bolt INSTALLATION OVERVIEW C1 Pr...

Страница 36: ... CABINET TEMPLATE FOR PREPARATION OF TOP CABINET You need to drill holes for the top support screws and a hole large enough for the power cord to fit through Read the instructions on the TOP CABINET TEMPLATE T ape it underneath the top cabinet Drill the holes following the instructions on the TOP CABINET TEMPLATE CAUTION Wear safety goggles when drilling holes in the cabinet bottom ADAPTING MICROW...

Страница 37: ... 2005 Maytag Services 16026440 B 1 Appendix B ...

Страница 38: ...B 2 16026440 2005 Maytag Services Use and Care Information JMV8186AA ...

Страница 39: ...n button The display shows LBS 3 Press the Option button repeatedly to select the weight measurements you wish to use 4 Press the Start button Setting the Remind End Signal The Remind End Signal can be set On or Off 1 Press the Option button and then press 3 The display shows REMIND END SIGNAL ON OFF PRESS OPTION PAD 2 Press the Option button to select ON The display shows ON 3 Press the Start but...

Страница 40: ...ll read CUSTOM RECIPE SAVED Using the Custom button Press the Custom button then press Start button You can check the power level while cooking is in progress by pressing the Power Level button Using the Kitchen Timer 1 Use the Number buttons to set the length of time you want the timer to run 2 Press the Kitchen Timer button 3 The display counts down and beeps when the time has elapsed 4 To cance...

Страница 41: ...appears in the display when the Auto Defrost button is pressed twice The repeated press increases the weight by 0 5 lb increments from 0 5 lb up to 6 0 lbs You can also use the number buttons to enter the weight of the food directly The oven calculates the defrosting time and starts automatically Once or twice during defrosting the oven will beep and the display will read TURN THE FOOD OVER 3 Open...

Страница 42: ...The display will show ENTER OFF TIME Enter the time of day for the light to go off 4 Select AM or PM by pressing the CLOCK AM PM button 5 Press the Auto Night Light button Note To review the Night light settings press the Auto Night Light button To turn the Night light off press 0 after selecting the Auto Night Light Setting Vent Auto Time Set 1 Press Vent 4 Speed button to select Vent fan speed 2...

Страница 43: ... 2005 Maytag Services 16026440 B 7 Use and Care Information UMV2186AA ...

Страница 44: ...be advanced one hour for DST without resetting the Clock Press Option 4 and select by repeatedly pressing Option To set press Start Sound Controls Sound Controls can be turned On and Off Press Option 5 and select by repeatedly pressing Option To set press Start Child Lock This feature prevents use by unsupervised children Press Option 6 and select by repeatedly pressing Option To set press Start S...

Страница 45: ...ll read CUSTOM RECIPE SAVED Using the Custom button Press the Custom button then press Start button You can check the power level while cooking is in progress by pressing the Power Level button Using the Kitchen Timer 1 Use the Number buttons to set the length of time you want the timer to run 2 Press the Kitchen Timer button 3 The display counts down and beeps when the time has elapsed 4 To cance...

Страница 46: ...ally Once or twice during defrosting the oven will beep and the display will read TURN THE FOOD OVER 3 Open the oven door and turn the food over 4 Press the Start button to resume defrosting even if you do not turn the food over when TURN THE FOOD OVER is displayed Using the Rapid Defrosting Button The Rapid Defrost function will automatically activate when defrosting foods that weigh 1 0 lb only ...

Страница 47: ...Replacement Cooktop Light Replace the burned out bulb with a 20 watt halogen bulb 1 To replace the bulb s first disconnect the power at the main fuse or circuit breaker panel or pull the plug 2 Remove the screw at the front of the light cover and lower the cover 3 Be sure the bulb s to be replaced are cool before removing After breaking the adhesive seal remove the bulb by gently turning Put in ne...

Страница 48: ... let them dry before replacing To replace slide the filters in the frame slot on the left of the opening Pull up and to the right to lock into place Charcoal Filter The charcoal filter cannot be cleaned It must be replaced If the oven is installed on the wall or cabinet and not vented to the out side the air will be recirculated through a disposable charcoal filter that helps remove smoke and odor...

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