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KitchenAid Architect Series KBMS1454R, Technical Education, Page: 1 / 68

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TECHNICAL EDUCATION

JOB AID 4317377

KAC-45

Built-In

Microwave 

Oven

Model: KBMS1454R

Summary of Contents for Architect Series KBMS1454R

Page 1: ...TECHNICAL EDUCATION JOB AID 4317377 KAC 45 Built In Microwave Oven Model KBMS1454R ...

Page 2: ...g Diagrams and Strip Circuits used in this Job Aid are typical and should be used for training purposes only Always use the Wiring Diagram supplied with the product when servicing the unit GOALS AND OBJECTIVES The goal of this Job Aid is to provide information that will enable the service technician to properly diagnose malfunctions and repair the Built In Microwave Oven The objectives of this Job...

Page 3: ...ATION 3 1 Theory Of Operation 3 1 Microwave Oven Control 3 2 Parts And Features 3 2 Troubleshooting 3 3 COMPONENT ACCESS 4 1 Component Locations 4 1 Removing The User Interface Board 4 2 Removing The Display Touch Panel Board Selector Board 4 3 Removing The Humidity Sensor The Cavity Thermostat 4 5 Removing The Interlock Switches 4 6 Removing The Halogen Lamp The Lamp Transformer 4 8 Removing The ...

Page 4: ... 5 5 Magnetron 5 6 High Voltage Transformer 5 6 High Voltage Capacitor Diode 5 7 Turntable Motor 5 8 DIAGNOSTICS TROUBLESHOOTING 6 1 Failure Code Indications 6 1 Microwave Oven Power Output Test 6 2 Primary Secondary Monitor Interlock Switch Checkout Procedure 6 3 Touch Panel 6 4 Board Interconnection Diagram 6 6 Microwave Oven Wiring 6 7 WIRING DIAGRAMS STRIP CIRCUITS 7 1 Schematic Diagram 7 1 Wi...

Page 5: ...kill or hurt you and others All safety messages will follow the safety alert symbol and either the word DANGER or WARNING These words mean DANGER WARNING All safety messages will tell you what the potential hazard is tell you how to reduce the chance of injury and tell you what can happen if the instructions are not followed You can be killed or seriously injured if you don t immediately follow in...

Page 6: ...etyproceduresshould be exercised at all times Untrained personnel should not attempt service without a thorough review of test procedures and safety information con tained in this Job Aid WARNING TO SERVICE TECHNICIANS KitchenAid microwave ovens have a monitor ing system designed to assure proper opera tion of the safety interlock systems The monitor switch will immediately cause the oven fuse to ...

Page 7: ...pping or Abuse C Before turning on the microwave power for any service test or inspection within the microwavegeneratingcomponents check the magnetron wave guide or transmis sion line and cavity for proper 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 a...

Page 8: ...mbly will normally register small emissions but they must be no greater than 4 mw cm2 to allow for measurement uncertainty NOTE Enter leakage readings in space BE FORE and AFTER on the service document All microwave ovens exceeding the emission level of 4 mw cm2 must be reported to Dept of Service for Microwave Ovens immediately and the owner should be told not to use the micro wave oven until it ...

Page 9: ... danger during ordinaryuse butextremecareshouldbetaken during repair CAUTION Service technicians should remove their watches whenever working close to or re placing the magnetron WARNING There is high voltage present with high current capabilities in the circuits of the pri mary and secondary windings the choke coil and the heat sink of the inverter It is extremely dangerous to work on or near the...

Page 10: ...T 13 1 3 CU FT 20 2 0 CU FT 14 1 4 CU FT 22 2 2 CU FT 15 1 5 CU FT FEATURES 2 PLUS FEATURES 5 DELUXE FEATURES 6 MICRO CONVECTION 7 MICRO CONVECTION WITH SENSOR 9 MULTIMODE HI SPEED CONVECTION S CARRY IN WARRANTY EFFECTIVE 02 96 X IN HOME WARRANTY EFFECTIVE 02 96 PRODUCT SIZE 0 30 WIDE 7 27 WIDE 2 22 WIDE 8 18 WIDE 4 24 WIDE 9 19 WIDE 6 36 WIDE YEAR OF INTRODUCTION R 2005 S 2006 COLOR CODE WH WHITE...

Page 11: ...1 7 MODEL SERIAL NUMBER LABEL AND TECH SHEET LOCATIONS The Model Serial Number label and Tech Sheet locations are shown below Tech Sheet Location Below Top Cover Model Serial Number Label Location ...

Page 12: ...r 60 minutes Add Minute Yes Instant Start OTHER FEATURES Stoppable Turntable No Pause Door Open Clock Yes 12 Hr Sales Demonstration Mode Yes Child Lock Yes Cancel Key for 5 seconds Instant Start Yes Add a minute Off Cancel Yes Start Enter Yes Options Yes Weight Oz Lbs Amount Pcs Cups Servings Clock On Off Variable Power Yes Ventilation Forced Air Weight Amount Indication Yes display lbs oz pcs ser...

Page 13: ...tron Standard SAFETY FEATURES Interlock Three Door Latch Operated Switches 1 Primary 1 Monitor 1 Secondary OTHER SPECIFICATIONS Electrical 120V Single Phase 60 Hz 1500 Watts For Use With 15 Amp Circuit Domestic Use Only Yes Agency Approvals FCC CDRH DHHS U L Listed CSA Listed Approx Shipping Weight 101 lbs Approx Net Weight 90 lbs UPC s White Black Biscuit STS LITERATURE Use Care Guide 8205301 Coo...

Page 14: ...itchenAid will not pay for 1 Service calls to correct the installation of your appliance to instruct you how to use your appliance to replace house fuses or correct house wiring or to replace owner accessible light bulbs 2 Repairs when your appliance is used in other than normal single family household use 3 Pickup and delivery Your appliance is designed to be repaired in the home 4 Damage resulti...

Page 15: ... must provide Wood cabinetry Cutout floor that is solid level and flush with bottom of cabinet cutout Support for weight of at least 150 lbs 68 kg which includes microwave oven and items placed inside Groundedelectricaloutletinsidecutoutopen ing see Electrical Requirements section Minimum installation clearances for installa tion location see Minimum Dimensions section We recommend Complete enclos...

Page 16: ... 7 6 cm 1 1 2 1 1 2 With flush receptacle or with non flush receptacle located in far corner of cutout Without flush receptacle DIM 24 61 0 CM 27 68 6 CM 30 76 2 CM INSTALLATION INSTALLATION INSTALLATION Width 22 1 4 56 5 m 25 3 4 65 4 cm 28 3 4 73 0 cm 3 16 4 8 mm 3 16 4 8 mm 3 16 4 8 mm Height 17 5 8 44 8 cm for all installations Depth 21 3 4 55 2 cm with flush receptacle or with non flush recep...

Page 17: ... 3 PRODUCT DIMENSIONS Measurements include front facing of microwave oven Depth measurement also includes door handle 21 7 8 55 6 cm 17 1 2 44 5 cm 18 1 4 46 4 cm 21 1 4 54 0 cm 23 3 4 60 3 cm 18 45 7 cm ...

Page 18: ...e oven must be grounded In the event of an electrical short circuit grounding reduces the risk of electric shock by providing an escape wire for the electric current The microwave oven is equipped with a cord having a grounding wire with a grounding plug The plug must be plugged into an outlet that is properly installed and grounded WARNING Improper use of the grounding plug can result in a risk o...

Page 19: ...crowave oven 4 Drill the 4 holes using 5 64 2 mm drill 5 With the microwave oven near the open ing plug the microwave oven into the grounded 3 prong outlet 6 Replace microwave oven in cutout open ing 7 Openthemicrowaveovendoor Theholes in the door facing frame should align with the holes just drilled into the cabinet Fas ten the microwave oven door facing to the cabinet using four 1 T 10 screws Ex...

Page 20: ...opening using four 1 2 T 10 screws 4 With the microwave oven near the open ing plug the microwave oven into the grounded 3 prong outlet 5 Slide microwave oven all the way into the opening NOTE The flat portion of the side brackets should slide over the tops of the Z brackets and the vertical portion of the side brackets should rest against the front surface of the recessed portion of the Z bracket...

Page 21: ... behind the door facing frame then push the outside edge of the trim behind the Z bracket as shown 9 Attach the side trim panel to the door facing frame using two 3 4 T 10 screws 10 Repeat steps 8 and 9 on other side A Door facing frame B Side bracket C Z bracket D Side trim panel A B C D A Door facing frame B Trim panel C 3 4 T 10 screws 4 A B C ...

Page 22: ...ollow these instructions can result in death fire or electrical shock WARNING COMPLETE THE INSTALLATION 1 Installtheturntableinthemicrowaveoven 2 Reconnect the power supply to the outlet 3 Check the operation of microwave oven by placing 1 cup 250 mL of water on the turntable and programming cook time of 1 minute at 100 power The Installation is complete ...

Page 23: ...vent opening and down into the oven cavity AIRFLOW The airflow enters the oven cavity through the top rear vents and travels down the back and along the floor towards the front door The air travels up the door and into the top front vents in the cavity ceiling where it exits the micro wave oven through the exhaust vents WH WH Cooling Fan High Voltage Transformer Magnetron Vanes Top Rear Vents Exha...

Page 24: ...Place the turntable on the support Fit the raised curved lines in the center of the turn table bottom between the three spokes of the hub The rollers on the support should fit inside the turntable bottom ridge A Frame B Control panel C Door safety lock system D Glass turntable E Turntable support rollers and hub F Door handle G Metal shielded window H Cooking guide label I Microwave oven light ina...

Page 25: ...e a qualified electrician check the electrical sys tem in the home Nothing will operate Has a household fuse blown or has a circuit breaker tripped Replace the fuse or reset the circuit Is the appliance wired properly See In stallation Instructions provided with the mi crowave oven Oven will not operate Is the door completely closed Firmly close door Is a spacer on some models attached to the insi...

Page 26: ... into the same outlet Try a different outlet Is the radio or TV receiver near the micro wave oven Move the receiver away from the microwave oven or adjust the radio or TV antenna Arethemicrowaveovendoorandsealing surfaces clean Make sure these areas are clean ...

Page 27: ...ry Interlock Switch Magnetron Thermostat Monitor Interlock Switch A Secondary interlock switch B Touch panel membrane switch C Humidity sensor D Fuse holder E Line fuse 20 amp F User interface board G Electronic control H L V light transformer I Line filter J Cooling fan motor K H V transformer L H V diode M H V capacitor N Magnetron O Magnetron thermostat opens at 293 F 145 C closes at 250 F 121 ...

Page 28: ...x screws from the top cover of the microwave 4 Lift the back of the cover slide the spring tab out of the control panel slot and re move the cover Electrical Shock Hazard Disconnect power before servicing Replace all parts and panels before operating Failure to do so can result in death or electrical shock WARNING User Interface Board To Selector Board To Electronic Control Board Clip User Interfa...

Page 29: ...Electrical Shock Hazard Disconnect power before servicing Replace all parts and panels before operating Failure to do so can result in death or electrical shock WARNING User Interface Board Holder Screws 6 Place the control panel on a padded work surface 5 Remove the four T20 Torx screws two on each side from the control panel assem bly and remove the assembly from the unit Control Panel Screws 7 ...

Page 30: ...the selector board and remove the board and its mounting bracket c Disconnect the 3 wire connector from the selector board b Press out on the holder clip and re move the touch panel board from the holder c Disconnect the touch panel board ground wire from its panel terminal Ribbon Cable Lift Bar Holder Clip Touch Panel Board Ground Connector Pull Knob Off Shaft Selector Board Screw 3 Wire Connecto...

Page 31: ...des of the subpanel Electrical Shock Hazard Disconnect power before servicing Replace all parts and panels before operating Failure to do so can result in death or electrical shock WARNING Lower Right Subpanel Screw b Remove the two screws from the hu midity sensor Rotate the subpanel out at the bottom just far enough to access the back screw Humidity Sensor 2 Screws c Cut the humidity sensor wire...

Page 32: ...he terminals to chassis ground 5 Open the oven door and remove the two interlock switch holder T10 Torx screws for the interlock switch you are servicing 6 To remove the secondary interlock switch a Push the locking tabs and unlock them from the interlock switch then push up on the switch and remove it from the holder b Disconnect the wires from the interlock switch terminals 7 To remove a primary...

Page 33: ... screws from the door latch assembly bottom inset c Carefully move the door latch assem bly away from the unit just far enough to release the actuating rod from the pri maryandmonitorinterlockswitchholder see the top right photo Door Latch Assembly Screws Reflected Image Door Latch Assembly Actuating Rod Lower Remove Top Of Actuating Rod Primary Interlock Sw Monitor Interlock Sw WH BU RD BU NC NC ...

Page 34: ...00Ωresistorfrom the terminals to chassis ground IMPORTANT NOTE When you remove and replace the halogen lamp be very careful not to allow the reflector and lens shown below to slide under the top floor of the microwave oven these two items are loose once the halogen bulb is removed If they are allowed to slide under the top floor they may be difficult to locate Halogen Lamp Lamp Transformer Halogen...

Page 35: ... transformer LOAD terminals Lamp Transformer Terminals Wire Tie 6 To remove the lamp transformer a Disconnect the four wire terminals from the transformer terminals b Remove the T10 Torx screw from the transformer and remove it from the mounting bracket LOAD Red Wires LINE Brn Wires Screw Lamp Transformer ...

Page 36: ...use Power Supply Cord Line Filter Capacitor 5 To remove the 20A line fuseholder a Remove the fuse from the fuseholder b Disconnect the two wire connectors from the terminals c Remove the T10 Torx screw from the fuseholder and remove the fuseholder Brn Wires Fuseholder Screw White Wire Black Wire Power Supply Cord Green Ground Wire 1 Unplug microwave oven or disconnect power 2 Remove the microwave ...

Page 37: ...m the rear of the chassis and remove the line filter capacitor 7 To remove the line filter capacitor a Disconnect the wires from the line filter capacitor terminals Black Ground Lug Black PS Cord Brown 20A Line Fuse White Cavity Therm Fuse White PS Cord Line Filter Capacitor Power Supply Cord Line Filter Capacitor Hex Nut ...

Page 38: ...4 CAUTION Discharge the high voltage capacitorusinga20 000Ωresistorfrom the terminals to chassis ground Cooling Fan Motor 5 Disconnect the motor connector 2 black wires from connector P2 on the electronic control board 6 Cut the wire tie with the two cooling fan motor wires 7 Remove the motor housing screw from the rear of the unit 8 Slide the cooling fan motor housing to the right and unhook the ...

Page 39: ...rews and remove the lower housing 11 Pull the fan off the motor shaft Cooling Fan Motor Lower Housing 3 Screws Cooling Fan Motor Upper Housing Screws Fan Motor REASSEMBLY NOTE When you mount the motor to the upper housing be sure to position the motor with the wires as shown in the top photo so they can be routed through the wire slot in the side of the housing Wire Slot ...

Page 40: ...s mounting location 3 Removethetopcoverfromthemicrowave see steps 3 and 4 on page 4 2 for the procedure 4 CAUTION Discharge the high voltage capacitorusinga20 000Ωresistorfrom the terminals to chassis ground Electronic Control Board 5 Disconnect the wire connectors from the electronic control board 6 Remove the two T10 Torx screws from the electronic control board then remove the board from the un...

Page 41: ...0 000Ωresistorfrom the terminals to chassis ground 7 To remove the magnetron a Removethemagnetronthermostat see step 6 b Remove the wires from the air vent standoffs c Remove the four T10 Torx screws two on each side and the ground wire eyelet from the air vent and remove the vent 5 Removetherightsidepanel seestep7on page 4 6 for the procedure Magnetron Mag Thermostat Magnetron Thermostat Screws W...

Page 42: ...4 16 d Pull the filament connector off the mag netron terminals e Remove the four T20 Torx screws from the magnetron and remove the magne tron from the unit Filament Connector Magnetron 4 Screws ...

Page 43: ...nd 4 on page 4 2 for the procedure 4 CAUTION Discharge the high voltage capacitorusinga20 000Ωresistorfrom the terminals to chassis ground HV Transformer Capacitor 5 Toremovethehighvoltagetransformer a Disconnect the white and blue wires from the primary terminals b Disconnectthefilamentconnectorfrom the magnetron terminals c Disconnect the orange and white wires from the high voltage capacitor d ...

Page 44: ...iode from the capacitor see step 6 b Disconnect the white and orange wires from the capacitor terminals e Remove the four high voltage trans former screws from the rear panel of the microwave oven and remove the transformer from the oven Rear Panel 4 Screws Screw Eyelet Diode Capacitor Terminal HV Diode c RemovetheT10capacitorbracketTorx screw from the rear panel and remove the bracket and capacit...

Page 45: ... or disconnect power 2 Remove the microwave oven from its mounting location 3 Open the oven door and remove the dish holder from the turntable motor shaft 4 Lay the microwave oven on its rear panel so you can access the bottom of the unit 5 Remove the two T20 Torx screws from the turntable motor 6 Disconnect the two wires from the turn table motor and remove the motor Dish Holder Turntable Motor S...

Page 46: ...off the rivet on the right side of the oven door NOTE A new rivet is supplied with the replacement oven door a rivet must be used in this application to deter disassem bly by customers 3 Remove the T10 Torx screws from the left and right sides of the oven door and remove the door Door Screw Door Rivet ...

Page 47: ...d unplugged from outlet and with wiring harness or connectors disconnected WARNING Electrical Shock Hazard Disconnect power before servicing Replace all parts and panels before operating Failure to do so can result in death or electrical shock HUMIDITY SENSOR 2 Disconnect the 3 wire connector from the HUM connector on the electronic control board 3 Set the ohmmeter to the R x 1K scale 4 Touch the ...

Page 48: ...below the floor of the oven cavity To check the thermostat perform the following steps 1 Unplug microwave oven or disconnect power 2 Disconnect the white wire from the high voltage transformer terminal 3 Set the ohmmeter to the R x 1 scale 4 Touchoneohmmetertestleadtothewhite wireconnectorfromthehighvoltagetrans former Touch the other ohmmeter test lead to the white wire of the magnetron thermosta...

Page 49: ...eter test leads to the terminals of the monitor interlock switch normally closed The meter should indi cate a closed circuit 0 Ω NOTE Pressing the actuator button should result in opposite readings normally open shouldreadclosed andnormally closedshould read open DOOR INTERLOCK SWITCHES Refer to page 4 8 for the procedure for access ing the lamp transformer 1 Unplug microwave oven or disconnect po...

Page 50: ...ting Failure to do so can result in death or electrical shock LINE FILTER CAPACITOR Refer to page 4 10 for the procedure for ac cessing the line filter capacitor 1 Unplug microwave oven or disconnect power 2 Discharge the line filter and high volt age capacitors using a 20 000 Ω resis tor from the terminals to chassis ground 3 Disconnect the wire connectors from the line filter capacitor terminals...

Page 51: ... Hazard Disconnect power before servicing Replace all parts and panels before operating Failure to do so can result in death or electrical shock Refer to page 4 15 for the procedure for ac cessing the magnetron thermostat 1 Unplug microwave oven or disconnect power 2 Disconnect the wires from the magnetron thermostat terminals 3 Set the ohmmeter to the R x 1 scale 4 Touch the ohmmeter test leads t...

Page 52: ... Touch the ohmmeter test leads to the two red black filament terminals The meter should indicate 0 Ω 7 Set the ohmmeter to the R x 1K scale 8 Touch one ohmmeter test lead to the transformer chassis ground lug Touch the other test lead to each of the filament terminals The meter should indicate infin ity at both terminals Primary Terminals Filament White Refer to page 4 15 for the procedure for ac ...

Page 53: ...eath or electrical shock 4 To test the high voltage capacitor a Set the ohmmeter to the R x 1K scale b Touch the ohmmeter test leads to the capacitor terminals The meter should indicate several ohms and gradually return to infinity c Touch one ohmmeter test lead to the capacitor case Touch the other test lead to each of the terminals The meter should indicate infinity at both termi nals 5 To test ...

Page 54: ...lectrical shock Refer to page 4 19 for the procedure for ac cessing the turntable motor 1 Unplug microwave oven or disconnect power 2 Disconnect one of the wire connectors from the motor terminals 3 Set the ohmmeter to the R x 1K scale 4 Touchtheohmmetertestleadstothe turn table motor terminals The meter should indicate approximately 2450 Ω TURNTABLE MOTOR ...

Page 55: ... Humidity sensor failure 1 Unplug microwave oven or disconnect power 2 Connect a new sensor to the electronic control at P2 3 Plug in microwave oven or reconnect power 4 If no failure code appears when starting sensor function Unplug microwave oven or disconnect power Replace old sensor 5 If failure code appears when starting sensor function Unplug microwave oven or disconnect power Replace electr...

Page 56: ...nded and record the tem perature This starting temperature of the water should be between 50 F and 75 F 10 C and 24 C 2 Place the beaker and water in the center of the microwave oven Operate on HIGH power level for 30 seconds 3 When the microwave oven is finished stir the thermometer through the water and record the temperature 4 Subtract the cold water temperature from the warm water temperature ...

Page 57: ...nal black wires to the normally closed terminal orange wire 1 Unplug microwave oven or disconnect power 2 Disconnect the wires at the Monitor Interlock Switch Monitor 3 Check from the common terminal white wire Interlock to the normally open terminal blue wires 1 Unplug microwave oven or disconnect power 2 Disconnect the wires at the Monitor Interlock Switch 3 Check from the common terminal white ...

Page 58: ... CEL OFF button unplug the microwave oven for 2 seconds then plug it back in TOUCH PANEL CONTINUITY TEST NOTE The distance between the ground plane and the membrane switch should be at least 7 25 7 mm The electrical top layer of the membrane switch must contain a ground plane pattern TOUCH PANEL 2 ReleasetheCANCEL OFFbuttonandclose the door 3 After pressing each button on the control panel 8 will ...

Page 59: ...6 5 KEY TABLE FOR TEST MODE ...

Page 60: ... P10 P2 P1 P3 2 3 2 1 1 1 2 1 6 8 BK R W 1 1 6 Y G Y G Secondary Interlock Switch Primary Interlock Switch Primary Interlock Switch Secondary Interlock Switch TT Relay 4906 Fan Relay 4901 Light Relay 4902 Cooling Fan Motor Turntable Motor Cavity Light Transformer MW Relay 4903 Secondary Interlock Switch H V Transformer HUMIDITY SENSOR 7001 R BU BU Y BR BR BR BK BK BR BR BU ...

Page 61: ...HITE WHITE WHITE YELLOW GREEN BROWN BLUE RED BROWN GREEN WHITE BLACK BROWN WHITE BLACK WHITE RED BROWN RED BROWN WHITE BLUE Y E L L O W BLUE WHITE RED WHITE RED WHITE BLACK YELLOW GREEN MICROWAVE OVEN WIRING ...

Page 62: ...6 8 NOTES ...

Page 63: ...7 1 WIRING DIAGRAMS STRIP CIRCUITS SCHEMATIC DIAGRAM Electronic Control ...

Page 64: ... P16 P4 7001 TT Relay 4906 Fan Relay 4901 Light Relay 4902 MW Relay 4903 7001 P32 P73 P74 P79 P72 P61 P60 Selector Bd Line Filter Power Cord 1 2 4 3 Cavity Thaernostat Turntable Motor Cavity Light Transformer Cavity Lamp Magnetron Thermostat Magnetron High Voltage Transformer High Voltage Diode High Voltage Capacitor No Load Cavity Thermostat Fan Motor 20A Fuse USER INTERFACE BOARD Left Secondary ...

Page 65: ...se 250 mA Fuse Secondary Interlock Switch Primary Interlock Switch MW Relay High Voltage System Control Inverter Power Supply Turntable Motor Fan Motor Turntable Relay Lamp Relay Fan Relay Filter Filter No Load Thermostat Cavity Thermostat Magnetron Thermostat Cavity Lamp ...

Page 66: ...7 4 TIME OF DAY DISPLAYED CONDITION DOOR CLOSED ...

Page 67: ...RIZED SERVICER FOR LITERATURE ORDERS PHONE 1 800 851 4605 FOR TECHNICAL INFORMATION AND SERVICE POINTERS www servicematters com IN CANADA FOR PRODUCT SPECIFICATIONS AND WARRANTY INFORMATION CALL 1 800 461 5681 FOR TECHNICAL ASSISTANCE WHILE AT THE CUSTOMER S HOME CALL THE TECHNICAL ASSISTANCE LINE 1 800 488 4791 HAVE YOUR STORE NUMBER READY TO IDENTIFY YOU AS AN AUTHORIZED SERVICER FOR WHIRLPOOL P...

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