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FGMV185KB Serial

1. Defective relay DC voltage not indicated Check diode which is connected to the relay coil If diode is good control unit is defective p 9 T qu e RELAY SYMBOL OPERATI ONAL VOLTAGE CONNECTED COMPONENTS Approx 24 0V D C Oven lamp Fan motor Antenna motor RY2 Approx 24 0V D C RY5 RY6 8 If any abnormal condition is defected replace the control unit 9 Disconnect the power supply cord and then remove outer case 10 Open the door and block it open 11 Discharge high voltage capacitor See Warnings and Instructions on page 3 1 12 Reconnect all leads removed from components during testing 13 Re install the outer case cabinet 14 Reconnect the power supply cord after the outer case is installed 15 Run the oven and check all functions 3 12 Section 3 Troubleshooting and Testing Procedure Letter Component Test PROCEDURES TO BE TAKEN WHEN THE FUSE ON THE PRI NTED WIRING BOARD PWB IS OPEN To protect electronic circuits this model is provided with a fuse added to the primary on the PWB Fuse check and repairs Disconnect the power supply cord Remove the covers Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 If the Fuse is blown replace power unit Make a visual inspection of the varistor Check for burned damage If the varistor has been burned replace the power unit 7 Examine t
2. SCHEMATIC NOTE CONDITION OF OVEN 1 DOOR CLOSED a ii i 120v AC NOTE x indicates components with potential above 250V z LN 2 CLOCK APPEARS ON DISPLAY V 7 BLK BLK TM RED RED ovEN THERMAL BRN ug EP BRN CUT OUT 1459C BRN Q BLK 9 P x BLK POWER UNIT Al COM N O LI Q 2 1 cu YLW I 7 C5 L RY6 D o HOOD FAN T1 CL THERMOSTAT O RY7 NU G RY2 2 ae PPL SI RY5 ai n PRIMARY S Y D Seng D O g INTERLOCK m 79 Er RELAY E E POWER NOISE FILTER UNIT Y Ps ne o LOW VOLTAGE SS TRANSFORMER PI i L TRANSFORMER Bo B3 High O z ES OVEN z 4 Q S e i LAMP T sce T m E m 1 RELAY O Q ali TT Es C100 o x Di Y o acc al gt 6 8uF E E i sel eigent E lt 8 amp 230V al Z i NE i i xm 9 e 709 797 Q7 00000090 SE L i 3 gt a Wer C3 el N O COM 6s Em iie Il ji el t u y Z zo 29 HIGH i 2 I 3 er gt gt E 3 2 4 5 1 CN N VOLTAGE a ie s 2 4 s fa am src 66 u CAPACITOR I KV 0 m w 0 94uF j S ST fm St 5 2300VAC i E O c COOK e E Z L r cl OF o o TOP 50 ol o E z Fe Cf al 2 U E LAMP 3 ol Sf z lt gt z gt lt o a a TA o o Ze Lu 2 ON N N 5 E gt gvi oi o nik Sp ug ic HIGH d SET En Gi a E So 0 VOLTAGE of m lt 2 RECTIFIER D z i s E t a d l HOOD F
3. 6 6 Packing and Accessories Exploded View 6 7 Section 1 Basic I nformation WARNING Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing Service personnel do not contact the following parts while the appliance is energized Inverter unit that includes high voltage capacitor high voltage power transformer high voltage rectifier heat sink etc magnetron high voltage harness etc If provided fan assembly cooling fan motor All the parts marked on parts list are used at voltages more than 250v Removal of the outer wrapper gives access to voltage above 250v All the parts marked A on parts list may cause undue microwave exposure by themselves or when they are damaged loosened or removed WARNING This service manual is intended for use by persons having electrical and mechanical training and a level of knowledge of these subjects generally considered acceptable in the appliance repair trade Electrolux home products cannot be responsible nor assume any liability for injury or damage of any kind arising from the use of this manual WARNING Never operate the oven until the following points are ensured A The door is tightly closed B The door brackets and hinges are not defective C The door packing is not damaged D The door is not deformed or warped E There is no other visible damage with the oven
4. WARNING I mproper use of the grounding plug can result in a risk of electric shock 3 Wei Plug Grounded Receptacle Box Electrical Requirements The oven is equipped with a 3 prong grounding plug DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE GROUNDING PIN FROM THE PLUG The power supply cord and plug must be connected to a separate 120 Volt AC 60 Hz 15 Amp or more dedicated line using a grounded receptacle When installing this appliance observe all applicable codes and ordinances A short power supply cord is provided to reduce risks of becoming entangled in or tripping over a longer cord Where a two pronged wall receptacle is encountered it is the personal responsibility and obligation of the customer to contact a qualified electrician and have it replaced with a properly grounded three pronged wall receptacle or have a grounding adapter properly grounded and polarized ad Pin 3 Pronged Receptacle If an extension cord must be used it should be a 3 wire 15 amp or more cord Do not drape over a countertop or table where it can be pulled on by children or tripped over accidentally 1 9 Section 1 Basic Information Oven Diagram 1 Microwave oven door with see through window 2 Door hinges 3 Waveguide cover DO NOT REMOVE 4 Turntable motor shaft 5 Microwave oven light It will light when microwave oven Is operating or door is open 6 Rack holders 7 Safety door latches The micr
5. FRIGIDAIRE WAY White Westinghouse Gibson Ketvinator TAPPANn Electrolux Major Appliances North America 250 Bobby Jones Expw Augusta GA 30907 Publication 5995532842 Part 316439274 April 2009 Section 1 Basic Information Safe Servicing Practices Avoid personal injury and or property damage by observing important Safe Servicing Practices Following are some limited examples of safe practices 1 DO NOT attempt a product repair if you have any doubts as to your ability to complete the repair in a safe and satisfactory manner Always Use The Correct Replacement Parts as indicated in the parts documentation Substitutions may defeat compliance with Safety Standards Set For Home Appliances Do not exceed maximum recommended wattage on light bulb replacements Doing so could blow fuses and or damage transformers Before servicing or moving an appliance e Remove power cord from the electrical outlet trip circuit breaker to the OFF position or remove fuse Never interfere with the proper operation of any safety device Use ONLY REPLACEMENT PARTS CATALOGED FOR THIS APPLIANCE Substitutions may defeat compliance with Safety Standards Set For Home Appliances GROUNDING The standard color coding for safety ground wires is GREEN or GREEN with YELLOW STRIPES Ground leads are not to be used as current carrying conductors It is EXTREMELY important that the service technician reestablish all safety grounds prior to compl
6. O S Thermistor open vessel C Thermistor closed vessel Humidity g m2 Figure 2 5 Humidity Sensor Operation 2 1 Section 2 Operation 3 Detector Circuit of Absolute Humidity Sensor Circuit This detector circuit is used to detect the output voltage of the humidity circuit to allow the LSI to control sensor cooking of the unit When the unit is set in the sensor cooking mode 32 seconds of clearing cycle occurs then the detector circuit starts to function and the LSI observes the initial voltage available at its P65 terminal With this voltage given the switches SW1 to SW5 in the LSI are turned on in such a way as to change the resistance values in parallel with P58 to P62 of IC2 Changing the resistance values results in that there is the same potential at both F 3 terminals of the humidity sensor and P66 terminal of the LSI The voltage of P65 terminal will indicate about 2 5V This initial balancing is set up about 32 seconds after the unit is put in the Sensor Cooking mode As the sensor cooking proceeds the food is heated to generate moisture by which the resistance balance the bridge circuit is deviated to increase the voltage available at P65 terminal of the LSI Then the LSI observes that voltage at P65 terminal and compares it with its initial value and when the comparison rate reaches the preset value fixed for each menu to be cooked the LSI causes the unit to stop sensor cooking thereafter the unit goe
7. Servicing and repair work must be carried out only by trained service personnel 1 3 Section 1 Basic Information Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy 1 Do not operate or allow the oven to be operated with the door open 2 Make the following safety checks on all ovens to be serviced before activating the magnetron or other micro wave source and make repairs as necessary 1 interlock operation 2 proper door closing 3 seal and sealing surfaces arcing wear and other damage 4 damage to or loosening of hinges and latches 5 evidence of dropping or abuse 3 Before turning on microwave power for any service test or inspection within the microwave generating compartments check the magnetron wave guide or transmission line and cavity for proper alignment integrity and connections 4 Any defective or misadjusted components in the interlock monitor door seal and microwave generation and transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is released to the owner 5 A microwave leakage check to verify compliance with the Federal Performance Standard should be performed on each oven prior to release to the owner Before Servicing Before servicing an operative unit perform a microwave emission check as per the Microwave Measurement Procedure outlined in this service manual If mic
8. RECTIFIER z m E E Er S z SL 22 d HOOD FAN d v NOE MOTOR ME ANN O Q Q O ee eee c ane COM N O SECONDARY INTERLOCK NOTES SWITCH 1 Circuits subject to change without notice 2 The neutral wire White or Gray wire must be connected to the prescribed tab terminal of the lamp socket 3 Only certain models use the humidity sensor 4 The neutral wire White Graywire must be connected to the winding end tab te rminal of the power transformer primary winding Figure 2 2 Oven ON Cooking Condition Touch Control Panel Assembly Outline The touch control section consists of the following units 1 Key unit 2 Control Unit The principal functions of these units and the signals communicated among them are explained below KEY UNIT The key unit is composed of a matrix signals generated in the LSI are sent to the key unit When a key pad is touched a signal is completed through the key unit and passed back to the LSI to perform the function that was requested CONTROL UNIT Control unit consists of LSI IC reset circuit indicator circuit power source circuit relay circuit buzzer circuit synchronizing signal circuit key unit circuit and humidity sensor circuit 1 IC1 LSI This is a microcomputer responsible for controlling the entire control unit 2 IC2 This is the IC to amplify the signal from the humidity sensor 3 1 3 This is the IC to drive the Fluorescent Display VFD 4 Reset Ci
9. Reconnect power supply cord after the outer case is installed Run oven and check all functions GRY WHT Resistance between WHT 1 AND GRY 4 0Q shorted BLK 2 AND GRY 4 32 Q WHT 1 AND BLK 2 32Q BLK 2 AND RED 3 142 RED 3 AND YLW 6 211 Q 5 69 112 142 2 ORG 5 AND YLW 6 62 BLK 6 PIN CONNECTOR ty RED OF HOOD FAN MOTOR 6 YLW HOODFAN CAPACITOR GRY ORG YLW Dn PURE O a G 3 8 Procedure Letter L Section 3 Troubleshooting and Testing Component Test TOUCH CONTROL PANEL ASSEMBLY TEST The touch control panel consists of circuits including semiconductors such as LSI ICs etc Therefore unlike conventional microwave ovens proper maintenance cannot be performed with only a voltmeter and ohmmeter In this service manual the touch control panel assembly is divided into two units Control Unit and Key Unit and troubleshooting by unit replacement is described according to the symptoms indicated Before testing 1 Disconnect the power supply cord and then disassemble as per HOOD LOUVER REMOVAL REMOVAL OF OVEN FROM WALL and OUTER CASE REMOVAL Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 Disconnect the leads to the primary of the power transformer Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure re c
10. Section 2 Operation Humidity Sensor Circuit 1 Structure of Absolute Humidity Sensor The absolute humidity sensor includes two thermistors as shown in the illustration below One thermistor is housed in the closed vessel filled with dry air while another in is the open vessel Each sensor is provided with the protective cover made of metal mesh to be protected from the external airflow Thermistors Sensing part Sensing part Open vessel AS I e E reat Ventilation opening for sensing Figure 2 4 Humidity Sensor Diagram 2 Operational Principle of Absolute Humidity Sensor The figure below shows the basic structure of an absolute humidity sensor A bridge circuit is formed by two thermistors and two resistors R1 and R2 The output of the bridge circuit is to be amplified by the operational amplifier Each thermistor is supplied with a current to keep it heated at about 150 C 302 F the resultant heat is dissipated in the air and if the two thermistors are placed in different humidity conditions they show different degrees of heat conductivity leading to a potential difference between them causing an output voltage from the bridge circuit the intensity of which is increased as the absolute humidity of the air increases Since the output is very minute it is amplified by the operational amplifier humidity vs output voltage Operational characteristic Rl amplifier Output voltage 0 CH B S 4 g
11. but not limited to the waveguide cavity seams magnetron gap between the door and the body of the oven 3 Move probe slowly not faster than 2 5 cm sec along the gap watching for the maximum indication on meter 4 Measure carefully at the point of highest leakage and make sure that the highest leakage is under 5 mW cm CAUTI ON Special attention should be given to avoid electrical shock because HI GH VOLTAGE is generated during this test E No Load test 1 Operate the oven without a load and measure the leakage by the same method as the above test procedure Leakage test with enclosure installed 2 Make sure that the highest leakage should not exceed 5 mW cm NOTE After servicing record data on service invoice and microwave leakage report 1 7 Section 1 Basic I nformation Product Specification Item Description Power Requirements USA 120 Volts 14 3 Amperes 60 Hertz Single phase 3 wire grounded Power Output 1000 watts IEC 705 Test Procedure Operating frequency of 2450MHz Case Dimensions excluding handle Width 29 15 16 Height 17 1 16 Depth 18 15 32 Cooking Cavity Dimensions Width 16 5 32 NOTE Internal capacity is calculated by measuring 1 8 Cubic Feet Height 9 21 32 maximum width depth and height Actual Depth 16 5 32 capacity for holding food is less Hood Lamp 20 Watt x 2 incandescent light bulb Oven Cavity Light 20 Watt x 1 incandescent light bulb Weight Approx 61 Ibs Control Compleme
12. must be performed with survey instrument and test result must be confirmed to meet the requirement of the performance standard for microwave ovens as under mentioned A Requirements Every microwave oven shall function in such a manner that when the oven is fully assembled and operating with its service controls and user controls adjusted to yield the maximum output the leakage radiation at all points at least 5 cm from the external surface of the oven does not exceed 1 1 0 mW cm2 with the test load of 275 15 ml of water at an initial temperature 20 5 C 2 5 0 mW cm when the outer enclosure is removed with a test load of 275 15 ml of water at an initial temperature 20 5 C 3 5 0 mW cm without a test load B Preparation for testing Before beginning the actual measurement of leakage proceed as follows 1 Make sure that the actual instrument is operating normally as specified in its instruction booklet Survey instruments that comply with the requirement for instrumentation as prescribed by CSA and NHW performance standard for microwave ovens must be used for testing recommended instruments are NARDA 8100 and NARDA 8200 2 Place the oven tray in the oven cavity 3 Place the load of 275 15 ml 9 8 oz of tap water initially at 20 5 C 68 F in the center of oven cavity The water container shall be a low form of a 600 ml 20 oz beaker with an inside diameter of approx 8 5 cm 3 1 2 in and made of an electrically n
13. plate 4 While supporting the oven remove the two 2 screws holding the oven outer case cabinet to the top cabinet 5 Remove the oven from the unit mounting plate and pull the power cord out of the wall cabinet 6 The oven is now free and can be placed on the work surface selected for servicing the oven 7 Installation is the reverse of this procedure 4 2 Hood Louver Removal 1 Disconnect the power supply cord 2 Open the oven door and block it open 3 Remove the one 1 screw holding the outer case cabinet to the oven cavity front face plate the position is front center on the outer case cabinet 4 Remove the two 2 screws holding the hood louver to the oven cavity 5 Remove the hood louver from the over by pushing the right and left tabs of the hood louver 6 Now the hood louver is free Hood Louver Figure 4 1 Outer Case Removal Remove the oven from the wall and proceed as follows 1 Disconnect the power supply cord 2 Open the door and block it open 3 Remove the one 1 screw holding the outer case cabinet to the oven cavity front face plate the position is front center on the outer case cabinet 4 Remove six 6 screws holding the rear stay to the hood fan motor or the oven and remove it 5 Remove the six 6 screws from the rear of the outer case cabinet 6 Slide outer case cabinet back about 1 inch 3cm to free it from retaining clips on the cavity face plate 7 Disc
14. C causing the oven to shut down TURNTABLE MOTOR The turntable motor rotates the turntable located on the bottom of the oven cavity so that the foods on the turntable cook evenly during cooking Turntable will turn in either direction The turntable motor can be turned off by touching TURNTABLE ON OFF pad COOLI NG FAN MOTOR The cooling fan motor drives a blade which draws external cool air This cool air is directed through the air vanes surrounding the magnetron and cools the magnetron This air is channelled through the oven cavity to remove steam and vapors given off from the heating foods It is then exhausted through the exhausting air vents at the oven cavity HOOD FAN MOTOR The hood fan motor is a two speed single phase double pole induction type requiring a hood fan capacitor and is located outside the upper rear part of the oven cavity The function is to remove from around the oven hot air rising from the conventional electric or gas range over which it is installed This air is then expelled either vertically or horizontally through the customer supplied duct system or discharged back into the kitchen The automatic operation is at medium speed The manual operation is three speed Low High THERMOSTAT 60 CON This thermostat is located on the right base plate It is designed to automatically turn on the hood fan motor whenever the hot air rising from the conventional range below causes the temperature at
15. E GRY 2 RELAY PRIMARY S YLW S INTERLOCKL J QN GRY g ye YLW ay RELAY i 0 20 O A G TURN 1 TURNTABLE TABLE LAMP MOTOR moTorL__1 lt 20W RELAY D H xNOTE 2 m o 3 O z ANTENNA SECONDARY MOTOR INTERLOCK 2 SWITCH Q 9 2 m O w TENER a DOOR SENSING HUMIDITY SENSOR SWITCH YLW MONITOR SWITCH O POWER BLK GRY TRANSFORMER NOTES 1 Circuits subjectto change without notice BREMEN 2 The neutral wire White or Gray wire must be connected to the prescribed tab terminal of the lamp socket HIGH 3 Only certain models use the humidity sensor VOLTAGE 4 The neutral wire White Gray wire must be connected to the CAPACITOR winding end tab terminal of the power transformer primary winding VOLTAGE SET RECTIFIER LEAD WI RE COLOR CODE r BLK BLACK GRY GRAY un BRN BROWN WHT WHITE es ORG ORANGE BLU BLUE TK MAGNETRON PNK PINK GRN GREEN PPL PURPLE RED RED YLW YELLOW Section 5 Wiring Diagrams Pictorial Component Diagram Magnetron Be w s e A c Ch LA AE KI NE M Ii H V Capacitor Ze Ue A Power Transformer Section 5 Wiring Diagrams iagram D iring W Of ale 1 in or co o al Sl ls 17 co olo Al alo 21 N N 23 24 25 o o e NEN DTAI4SES i i semi LIEP ER IERIEREREEERE EEEEEEEE WE x2 a fo a fafa fo fa ffs IN s 4
16. IE 1 8 Grounding Bled Le gel 1 9 Electrical Requirements eeennn 1 9 Oven DIAGN AINA EE 1 10 Section 2 Operation Operating Sequence Descrpton 2 1 Sigel T 2 1 COOKING Condition E 2 1 Oven Schematic Off Condition 2 2 Oven Schematic Cooking Condition 2 2 Touch Control Panel Assembly Outline 2 3 XS AT 2 3 COR OA a T 2 3 Power Level P 0 To P 90 Cooking 2 4 Power Output Reduchon 2 4 Ventilation Methods Hot Air Exhaust 2 4 Sensor COOKING COPBgdltlOFusasaevad aser Cdi inen oaa 2 5 Belgie Unie 2 5 Component Descriptions ccceceececeeeeeeeeeeeeeeeees 2 6 Door Open Mechanism cccecceceeeeeeeeeeeeeeeeseees 2 6 Door Sensing And Secondary Interlock Switch 2 6 Monitor Switch 2 6 Thermal Cut Out Cavity sssevviadasc bar ioo di ee COL n 2 6 Turntable e EE 2 7 Cooling Farn MOLOI EE 2 7 HO Eb MODO eet 2 7 Thermostat 60 CON var nas usss 2 7 PCCM MOOT iire serieen 2 7 COOK TOC E lee 2 7 Humidity Sensor Circuit EE 2 8 1 2 Section 3 Troubleshooting and Testing Warnings and AUTIONS sas 3 1 Troubleshooting Guide Chart 3 2 Test RECOURS 3 3 Section 4 Component Teardown Warnings and Ke gen 4 1 Removal Of Oven From Wall ccceceseeseeeeeeeeeenes 4 2 Hood el We EE 4 2 Outer Case Remowval eene 4 2 C
17. OUTPUT POWER Power output of the magnetron can be measured by performing a water temperature rise test This test should only be used if above tests do not indicate a faulty magnetron and there is no defect in the following components or wiring silicon rectifier high voltage capacitor and power transformer This test will require a 16 ounce 453 cc measuring cup and an accurate mercury thermometer or thermocouple type temperature tester For accurate results the following procedure must be followed carefully 1 Fill the measuring cup with 16 oz 453 cc of tap water and measure the temperature of the water with a thermometer or thermocouple temperature tester Stir the thermometer or thermo couple through the water until the temperature stabilizes Record the temperature of the water 2 Place the cup of water in the oven Operate oven at 100 POWER selecting more than 60 seconds cook time Allow the water to heat for 60 seconds measuring with a stop watch second hand of a watch or the digital read out countdown 3 Remove the cup from the oven and again measure the temperature making sure to stir the thermometer or thermocouple through the water until the maximum temperature is recorded 4 Subtract the cold water temperature from the hot water temperature The normal result should be 29 2 to 54 2 F 16 2 to 30 1 C rise in temperature If the water temperatures are accurately measured and tested for the required time period the test re
18. following adjustment should be made Loosen the two 2 screws holding latch hook to the oven cavity front flange With door closed adjust latch hook by moving it back and forth and up and down In and out play of the door allowed by the upper and lower position of the latch hook should be less than 0 5mm The vertical position of latch hook should be adjusted so that the door sensing switch secondary interlock switch are activated with the door closed The horizontal position of the latch hook should be adjusted so that the monitor switch is activated with the door closed Secure the screws with washers firmly Check all of the switches operation If any switch has not activated with the door closed loosen screw and adjust the latch hook position After adjustment check the following l EM In and out play of door remains less than 0 5mm when in the latched position First check upper position of latch hook pushing and pulling upper portion of door toward the oven face Then check lower portion of latch hook pushing and pulling lower portion of the door toward the oven face Both results play in the door should be less than 0 5mm The door sensing switch and secondary interlock switch interrupt the circuit before the door can be opened Monitor switch contacts close when door is opened The contact of door sensing switch and secondary interlock switch open within 1 2mm gap between right side of cavity face plate a
19. is equivalent to the oven door being closed As for the sensor related controls of the touch control panel checking them is possible if dummy resistor s with resistance equal to that of the controls are used B Servicing the touch control panel with power supply from an external power source Disconnect the touch control panel completely from the oven proper and short both ends of the door sensing switch on PWB of the touch control panel which brings about an operational state that is equivalent to the oven door being closed Connect an external power source to the power input terminal of the touch control panel then it is possible to check and repair the controls of the touch control panel it is also possible to check the sensor related controls of the touch control panel by using the dummy resistor s Servicing Tools Tools required to service the touch control panel assembly 1 Soldering iron 60W It is recommended to use a soldering iron with a grounding terminal 2 Oscilloscope Single beam frequency range DC 10MHz type or more advanced model 3 Others Hand tools Other Precautions 1 Before turning on power source of the control unit remove the aluminium foil applied for preventing static electricity 2 Connect the connectors of the key unit to the control unit being sure that the lead wires are not twisted 3 After aluminium foil is removed be careful that abnormal voltage due to static electric
20. joint pliers CAUTION Make sure that any pieces do not enter the gap between the rotor and the stator of the fan motor Because the rotor is easy to be shaven by pliers and metal pieces may be produced Do not touch the pliers to the coil of the fan motor because the coil may be cut or damaged Do not disfigure the bracket by touching with the pliers 4 7 Section 4 Component Teardown 13 Remove the fan blade from the shaft of the fan motor by pulling and rotating the fan blade with your hand 14 Now the fan blade will be free CAUTION Do not re use the removed fan blade because the hole for shaft may be larger than normal Bracket Rotor Rear View 15 Remove the two 2 screws holding the fan motor to the fan duct 16 Now the fan motor is free Installation 1 Install the fan motor to the fan duct with the two 2 ae Hee Screws li with pliers 2 Install the fan blade to the fan motor shaft according to the following procedure Side View 3 Hold the center of the bracket which supports the shaft of the fan motor on the flat table 4 Apply screw lock tight into the hole for shaft of the fan blade 5 Install the fan blade to the shaft of fan motor by pushing the fan blade with a small light weight ball Center of peen hammer or rubber mallet Bracket CAUTION Figure 4 4 Door Switch Components Do not hit the fan blade strongly when installing because the bracket may be deform
21. oven while using Sensor settings The sensor will detect vapor given of by the spray and turn off before food is properly cooked 8 After the oven is started on sensor cooking condition if the sensor has not detected the vapor of the food within 30 minutes ERROR will appear and the oven will shut off WATER LOAD COOKING TEST WARNING The oven should be fully assembled before following procedure Make sure the oven has been plugged in at least two minutes before checking sensor cook operation The cabinet should be installed and screws tightened 1 Fill approximately 200 milliliters 7 2 oz of tap water in a 1000 milliliter measuring cup 2 Place the container on the center of tray in the oven cavity 3 Close the door 4 Touch the Timer On Off pad once the POWER LEVEL pad twice and the START pad once And touch the number pads 1 once and the number pad 2 once Now the oven is in the sensor cooking condition and AH10 and COOK will appear in the display 5 The oven will operate for the first 32 seconds without generating microwave energy bL NOTE ERROR will appear if the door is opened or STOP CLEAR pad is touched during first stage of sensor cooking 6 After approximately 32 seconds microwave energy is produced If ERROR is displayed or the oven does not turn off replace the humidity sensor or check the control unit refer to explanation on next page 3 14 Section 3 Troubleshooting and Testing Pr
22. reheat often 3 O Q er is at fault Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 Remove the control unit cover Reconnect all leads removed from components during testing Re install the covers outer case cabinet and control unit cover Reconnect the power supply cord after the covers outer case cabinet and control unit cover are installed Run the oven and check all functions 3 11 Section 3 Troubleshooting and Testing Procedure Letter Component Test N RELAY TEST Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 Disconnect the leads to the primary of the power transformer Ensure that these leads remain isolated from other components and oven chassis by using insulation tape After that procedure re connect the power supply cord 7 Remove the outer case and check voltage between Pin No 1 of the 3 pin connector A and the oven side terminal of the relay RY1 on the control unit with an A C voltmeter The meter should indicate 120 volts if not check oven circuit RY1 and RY2 Relay Test These relays are operated by D C voltage Check voltage at the relay coil with a D C voltmeter during the microwave cooking operation DC voltage indicated
23. the state of the relay contacts using an ohmmeter The relay contacts should be open If the relay contacts are closed replace the circuit board entirely or the relay itself 5 Reconnect all leads removed from components during testing 6 Reinstall the outer case cabinet 7 Reconnect the power supply cord after the outer case is installed 8 Run the oven and check all functions 3 6 Section 3 Troubleshooting and Testing Procedure Letter Component Test MONI TOR SWITCH TEST Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 Before performing this test make sure that the secondary interlock switch and the primary interlock relay are operating properly according to the above Switch Test Procedure Disconnect the wire lead from the monitor switch COM terminal Check the monitor switch operation by using the ohmmeter as follows When the door is open the meter should indicate a closed circuit When the monitor switch actuator is pushed by a screwdriver through the lower latch hole on the front plate of the oven cavity with the door opened in this condition the plunger of the monitor switch is pushed in the meter should indicate an open circuit If improper operation is indicated the switch may be defective After testing the monitor switch reconnect wire lead to monitor switch COM terminal and check cont
24. the thermostat to rise to 140 F 60 C or higher thus removing this hot air from around microwave oven When the temperature around the thermostat drops to 113 F 45 C or lower the thermostat shuts off the hood fan motor ANTENNA MOTOR The motor drives the stirrer fan to stir the microwave radiation from the waveguide COOK TOP LAMP The cook top lamp is mounted at the lamp mounting angle on the base cover Touch the LI GHT pad once for high twice for low and four times to turn off the light Section 2 Operation Humidity Sensor Circuit 1 Structure of Absolute Humidity Sensor The absolute humidity sensor includes two thermistors as shown in the illustration below One thermistor is housed in the closed vessel filled with dry air while another in is the open vessel Each sensor is provided with the protective cover made of metal mesh to be protected from the external airflow Thermistors Sensing part Sensing part Open vessel AS I e E reat Ventilation opening for sensing Figure 2 4 Humidity Sensor Diagram 2 Operational Principle of Absolute Humidity Sensor The figure below shows the basic structure of an absolute humidity sensor A bridge circuit is formed by two thermistors and two resistors R1 and R2 The output of the bridge circuit is to be amplified by the operational amplifier Each thermistor is supplied with a current to keep it heated at about 150 C 302 F the resultant heat is d
25. up about 32 seconds after the unit is put in the Sensor Cooking mode As the sensor cooking proceeds the food is heated to generate moisture by which the resistance balance the bridge circuit is deviated to increase the voltage available at P65 terminal of the LSI Then the LSI observes that voltage at P65 terminal and compares it with its initial value and when the comparison rate reaches the preset value fixed for each menu to be cooked the LSI causes the unit to stop sensor cooking thereafter the unit goes in the next operation automatically When the LSI starts to detect the initial voltage at P65 terminal 32 seconds after the unit has been put in the Sensor Cooking mode if it is not possible to balance the bridge circuit due to disconnection of the humidity sensor ERROR will appear on the display and the cooking is stopped Humidity sensor circuit C Thermistor in closed vessel S Thermistor in open vessel VA 15V VA 15V VC 5V TURNTABLE MOTOR The turntable motor rotates the turntable located on the bottom of the oven cavity so that the foods on the turntable cook evenly during cooking Turntable will turn in either direction The turntable motor can be turned off by touching TURNTABLE ON OFF pad COOLI NG FAN MOTOR The cooling fan motor drives a blade which draws external cool air This cool air is directed through the air vanes surrounding the magnetron and cools the magnetron This air is ch
26. 1 screw holding the antenna motor to the waveguide of the oven cavity Remove the antenna motor from the waveguide Now the antenna motor is free When installing the antenna motor the shaft of antenna motor must be inserted to the antenna shaft Refer to the procedure of Stirrer Cover And Stirrer Fan Installation Stirrer Cover And Stirrer Antenna l nstallation Put the stirrer antenna fan on wave guide to match the stirrer antenna shaft to the center of stirrer hole Insert the shaft of stirrer antenna to the shaft of stirrer antenna motor Insert cutout of stirrer cover to the tabs on ceiling Install the stirrer cover to the oven cavity and secure it by one canoe clip Stirrer Antenna Stirrer Cover Canoe Clip Figure 4 5 Door Switch Components Rotate antenna holder to lock at the cavity top plate Section 4 Component Teardown Oven Lamp Removal 1 Disconnect the power supply cord 2 Remove the hood louver from the oven Refer to procedure of Hood Louver Removal Lift the oven lamp cover up Now the oven lamp and the socket are found Screw the oven lamp off from the lamp socket Now the oven lamp is free p M iw es Positive Lock Connector No Case Type Removal 1 Disconnect the power supply cord and remove the oven from wall and outer case Refer to procedure of Removal of Oven from Wall and Outer Case Removal 2 Open the door and block it open 3 Discharge high vo
27. 8 Now the turntable motor is free Cook Top Lamp Socket Removal 1 Disconnect the power supply cord 2 Remove the three 3 screws holding the deflector to the base cover 3 Remove the four 4 screws holding the base cover to the oven cavity 4 Pull down and slide to left the base cover And remove the base cover from the cavity back plate 5 Disconnect the wire leads from the lamp socket 6 Screw the oven lamp off the lamp socket 7 Screws the lamp socket off the lamp mounting angle 8 Now the lamp socket is free 4 13 Section 4 Component Teardown Notes 4 4 Section 5 Wiring Diagrams Wiring Schematic Oven ON Condition WHT 60Hz E 120V AC p RESISTOR 470kQ 1 2W LINE CROSS CAPACI md OUF 250V Ia NOISE SUPRESSION COIL 1 0mH LINE BYPASS CAPACITOR LI NE BYPASS CAPACITOR 3300pF 250V 3300pF 250V 18 HOOD FAN THERMOSTAT RED 602c Q gt 2 pu Z Bo 2 Q Q Q Q 3 z s 5 Q I Q 2 5 LHM LHM MIA D U p D Oo DI O Ww N Ul L OVEN THERMAL CUT OUT Ee C100 6 8uF ine O O z 230v BE E lt lt o o WEN 20W ak H CF E E m O E X zZ COOK 2 m z 2 wur TOP Ee o CR ls m HT LAMP Q N E X EA x is 20W BRN WHT Z WHT oO LOW VOLTAGE MAGNETRON TRANSFORMER TEMP FUSE e VRS1 zl g ot 2 O gt J U ge O m L RED OVEN o Q Q GRY A LAMP RY2
28. AN d v x POUR i aa Q Q Q O po e ee WHT COM N O WHT SECONDARY INTERLOCK NOTES SWITCH 1 Circuits subject to change without notice 2 The neutral wire White or Gray wire must be connected to the prescribed tab terminal of the lamp socket 3 Only certain models use the humidity sensor 4 The neutral wire White Graywire must be connected to the winding end tab te rminal of the power transformer primary winding Figure 3 VARIABLE COOKING CONTROL HIGH 120V AC 4 START PAD TOUCHED BLK MAGNETRON WW ate BRN TEMP FUSE OVEN THERMAL BRN CUT OUT 1452C BRN POWER UNIT Al eT Ts Jew vi pou E e Ce d RY6 HOOD FAN THERMOSTAT O RY7 o O O O ca Co PPL PRIMARY i Y S SE low RG o g INTERLOCK a m O MM RELAY mur C7 e RY8 GRN ISE POWER NOISE FILTER UNIT Q NO O LOW VOLTAGE TRANSFORMER RE CRT i I TRANSFORMER ae High B3 T Hig o z ka NE g S a 1 fad q 3 E ul O H Oo i gt x v lt DE z gt 4 J o C400 T EK al 6 8yF El S r lt ac O 230V a EO i x m 9 A3 7 a 0 f Se z C3 al no z EE al z ui WHT gt 23 gt S f 3 Y zl ee M HIGH el Be 3 2 4 5 1 CN N a LT xa x VOLTAGE a GARDEN E OO Sf x a CAPACITOR SI a u 0 94uF Se x m 5 2300VAC TE c c COOK Z 8 af 8 TOP E ey oe a 9 LAMP 3 QE o K z z gt lt o o iun z Kk LLI o 2 ON 1 N N 2 E gt i Si cl gaz 2g i Tu ET o 22 i a z VOLTAGE ul cn or
29. ARTS FOR FGMV185KB W Door stopper Door sub assembly FGMV185KW FGMV185KB Door frame FGMV185KW FGMV185KB Latch head Spring Choke cover Sealer film Door handle FGMV185KW FGMV185KB Screw 4mm x 10mm Screw 4mm x 15mm Screw 4mm x 8mm Door glass FGMV185KW FGMV185KB Glass stopper FGMV185KW FGMV185KB Badge FGMV185KW FGMV185KB 202 101 200 6 5 Section 6 Parts List Door Parts FGMV185KF amp FGMV189KF 6 6 d DESCRIPTION DOOR PARTS FOR FGMV185KF FPMV189KF Door stopper Door sub assembly FPMV189KF FGMV185KF Door frame assembly FPMV189KF FGMV185KF Latch head Spring Choke cover Sealer film Door handle FPMV189KF FGMV185KF Screw 4mm x 10mm Screw 4mm x 15mm Badge FGMV185KF FGMV185KW FGMV185KB FPMV189KF 73 FPMV189FK Section 6 Parts List Packing and Accessories PACKING AND ACCESSORIES Damper assembly Turntable Accessory assembly Cushion Installation instructions Instruction book Top template Top template Mesh filter Rack TOP PAD DOOR PROTECTOR PROTECTION SHEET 38 gt TURNTABLE TRAY TRAY PAD EM e Door PAD ACCESSORY ASSEMBL
30. B Open the door and wedge the door open C Discharge the high voltage capacitor and wait for 60 seconds 2 DO NOT let wire leads touch to the following parts A High voltage parts Magnetron High voltage transformer High voltage capacitor and High voltage rectifier assembly B Hot parts Oven lamp Magnetron High voltage transformer and Oven cavity C Sharp edge Bottom plate Oven cavity Waveguide flange Chassis support and other metallic plates D Movable parts to prevent a fault Fan blade Fan motor Switch Switch lever Open button 3 Do not catch the wire leads in the outer case cabinet 4 Insert the positive lock connector completely until its pin is locked Make sure that the wire leads should not come off even if the wire leads are pulled 5 To prevent an error function connect the wire leads correctly referring to the Pictorial Diagram WARNING Avoid possible exposure to microwave energy Please follow instructions below before operating oven l Disconnect the power supply cord 2 Make sure that a definite click can be heard when the microwave oven door is unlatched Hold the door in a closed position with one hand then push the door open button with the other this causes the latch leads to rise it is then possible to hear a click as the door switches operate 3 Visually check the door and cavity face plate for damage dents cracks signs of arcing etc Carry out any remedial work that is necessa
31. EVEL P 0 TO P 90 COOKI NG VENTI LATI ON METHODS HOT AI R EXHAUST When Variable Cooking Power is programmed the 1 Vertical Venting 120 volts A C is supplied to the power transformer intermittently through the contacts of relay RY2 which is operated by the control unit within an interval second time base Microwave power operation is as follows For this venting method hot air rising from the conventional range below is drawn in by the hood fan motor through the grease filters at the right and left sides of the base cover up through the right and left sides of the oven cavity then discharged vertically at rear Vari Mode ON TIME OFF TIME center top of the oven into the customer s vent system Power 10 High 100 Power 32 sec 0 sec Air Flow Power 9 P 90 Approx 90 30 sec 2 sec To Duct To Duct Power 8 P 80 Approx 80 26 sec 6 sec Hood Fan Motor Power 7 P 70 Approx 70 24 sec 8 sec E Power 6 P 60 Approx 60 22 sec 10 sec Power 5 P 50 Approx 50 18 sec 14 sec Power 4 P 40 Approx 40 16 sec 16 sec Power 3 P 30 Approx 30 12 sec 20 sec Power 2 P 20 Approx 20 8 sec 24 sec Power 1 P 10 Approx 10 6 sec 26 Sec Power 0 P 0 0 power 0 sec 32 sec 2 Horizontal Venting A NOTE The air handing is the same as Vertical Venting except that final air discharge is directed horizontally out from The ON OFF time ratio does not correspond with the top rear of oven i
32. POTATOES E Potatoes at room temperature Vapor is emitted very slowly 2 Heat Potatoes Moisture and humidity is emitted rapidly You can smell the aroma as it cooks 3 Sensor detects moisture and humidity and calculates cooking time and variable power AH SENSOR WC TEN ROW UM Section 2 Operation COOKI NG SEQUENCE 1 Operate the oven in sensor cooking mode by refer ring to the operation manual b NOTE The oven should not be operated on Sensor Cooking immediately after plugging in the unit Wait two minutes before cooking on Sensor Cooking 2 The coil of shut off relays RY1 and RY3 are energized the oven lamp turntable motor and cooling fan motor are turned on but the power transformer is not turned on 3 After about 32 seconds the relay RY2 is energized The power transformer is turned on microwave energy is produced and first stage is started The 32 seconds is the cooling time required to remove any vapor from the oven cavity and sensor b NOTE During this first stage do not open the door or touch Clear Off pad 4 When the sensor detects the vapor emitted from the food the display switches over to the remaining cooking time and the timer counts down to zero At this time the door may be opened to stir food turn it or season etc 5 When the timer reaches zero an audible signal sounds The shutoff relay RY1 and RY3 and relay RY2 are generalized and the power transfor
33. Y WALL TEMPLATE COS RACK OPERATION MANUAL RACK PAD INSTALLATION INSTRUCTION d gt TOP TEMPLATE ge GREASE FILTER x2 36 5 DAMPER ASSEMBLY 2 c BOTTOM PAD ACCESSORY HOLDER EHP LABEL Non replaceable items PACKING CASE 6 Section 6 Parts List Notes
34. ZZ oo NW 1 Right Base plate Figure 4 3 Door Switch Components Section 4 Component Teardown Cooling Fan Motor Removal Removal 1 Disconnect power supply cord remove oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal 2 Open the door and block it open 3 Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver 4 Remove two 2 screws holding the chassis support right to the rear and face of the oven cavity flange 5 Remove the one 1 screw holding the noise filter assembly to the fan duct 6 Disconnect the wire leads from the fan motor 7 Disconnect the high voltage wire leads of the high voltage rectifier assembly from the magnetron 8 Disconnect the filament lead of the transformer from the magnetron 9 Remove the one 1 screw holding the hood duct to the fan duct and remove the one 1 screw holding the oven cavity top plate to the fan duct 10 Remove the one 1 screw holding the right base plate to the fan duct and remove the fan duct assembly 11 Remove the fan blade from the fan motor shaft according the following procedure 12 Hold the edge of the rotor of the fan motor by using a pair of groove
35. ads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions C HI GH VOLTAGE RECTIFIER TEST Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 Isolate the rectifier from the circuit Using the highest ohm scale of the meter read the resistance across the terminals and observe reverse the leads to the rectifier terminals and observe meter reading If a short is indicated in both directions or if an infinite resistance is read in both directions the rectifier is probably defective and should be replaced Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions D NOTE Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6 3 volts 3 4 Section 3 Troubleshooting and Testing Procedure Letter Component Test HI GH VOLTAGE CAPACI TOR TEST Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 If the capacitor is open no high voltage will be available to the magnetron Disconnect input leads and c
36. age rectifier against the chassis with the use of an insulated screwdriver 4 Disconnect the leads to the primary of the power transformer 5 Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure re connect the power supply cord After checking performance of the touch control panel 1 Disconnect the power supply cord 2 Open the door and block it open 3 Reconnect the leads to the primary of the power transformer 4 Reinstall the outer case cabinet 5 Reconnect the power supply cord after the outer case is installed 6 Run the oven and check all functions a On some models the power supply cord between the touch control panel and the oven itself is so short that the two can t be separated For those models check and repair all the controls sensor related ones included of the touch control panel while keeping it connected to the oven continued next page 4 3 Section 4 Component Teardown b On some models the power supply cord between the touch control panel and the oven proper is long enough that they may be separated from each other For those models it is possible to check and repair the controls of the touch control panel while keeping it apart from the oven proper in this case you must short both ends of the door sensing switch on PWB of the touch control panel with a jumper which activates an operational state that
37. al preventing leakage of microwave energy from oven cavity during cook cycle This function does not require that door be air tight moisture tight or light tight Therefore occasional appearance of moisture light or sensing of gentle warm air movement around oven door is not abnormal and does not indi cate a leakage of microwave energy from oven cavity Upper Door Hinge Pin rex RE INSTALL Lower Door 1 Hinge Pin Cl eua NSTALL Figure 4 8 Control Panel and CPU 4 12 Door Disassembly Removal L 4 5 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal Open the door and block it open Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver Remove the hood louver from the oven cavity Refer to the procedure of Hood Louver Removal Remove door assembly refer to Door Replacement Replacement of door components are as follows Place door assembly on a soft cloth with latches facing up b NOTE As the engaging part of choke cover and door frame are provided at 16 places do not force any particular part Choke Cover Insert a
38. and Instructions on page 3 1 Disconnect the sensor connector that is mounted to control panel Then connect the dummy resistor circuit see fig to the sensor connector of control panel Disconnect the leads to the primary of the power transformer Ensure that these leads remain isolated from other components and oven chassis by using insulation tape After that procedure re connect the power supply cord Check the sensor cook operation proceed as follows a Close the door Touch the Timer On Off pad once the POWER LEVEL pad twice and the START pad once Then touch number pad 1 once and the number pad 2 once b The control panel is in the sensor cooking operation c After approximately 41 seconds push plunger of select switch for more than 3 seconds This condition is same as judgement by humidity sensor d After approximately 3 seconds the display shows X X X X which is the time for detecting moisture If the above is not the case the control unit is probably defective If the above is proper the humidity sensor is probably defective Continued on next page 2 en d eg tO co 3 15 Section 3 Troubleshooting and Testing Procedure Letter Component Test 10 Disconnect the power supply cord and then remove outer case 11 Open the door and block it open 12 Discharge high voltage capacitor See Warnings and Instructions on page 3 1 13 Disconnect the dummy resistor circuit from the sensor connector of
39. annelled through the oven cavity to remove steam and vapors given off from the heating foods It is then exhausted through the exhausting air vents at the oven cavity HOOD FAN MOTOR The hood fan motor is a two speed single phase double pole induction type requiring a hood fan capacitor and is located outside the upper rear part of the oven cavity The function is to remove from around the oven hot air rising from the conventional electric or gas range over which it is installed This air is then expelled either vertically or horizontally through the customer supplied duct system or discharged back into the kitchen The automatic operation is at medium speed The manual operation is three speed Low High THERMOSTAT 60 CON This thermostat is located on the right base plate It is designed to automatically turn on the hood fan motor whenever the hot air rising from the conventional range below causes the temperature at the thermostat to rise to 140 F 60 C or higher thus removing this hot air from around microwave oven When the temperature around the thermostat drops to 113 F 45 C or lower the thermostat shuts off the hood fan motor ANTENNA MOTOR The motor drives the stirrer fan to stir the microwave radiation from the waveguide COOK TOP LAMP The cook top lamp is mounted at the lamp mounting angle on the base cover Touch the LI GHT pad once for high twice for low and four times to turn off the light
40. control panel 14 Carry out necessary repair 15 Reconnect all leads removed from components during testing and repairing 16 Re install the outer case cabinet 17 Reconnect the power supply cord after the outer case is installed Run the oven and check all functions 18 Carry out Water load cooking test again and ensure that the oven works properly R1 R2 220 1 1 2W 2 Plunger R3 4 3kQ 5 1 4W NC R4 1MQ 1 4W NO To connector F on Control Unit z COM CONNECTOR NOI SE FILTER TEST Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 Disconnect the leads to the primary of the power transformer Using an ohmmeter check between the terminals as described in the following table MEASURI NG POINT INDI CATI ON OF OHMMETEF Between N and H Approx 470 KW Between terminal N and LOAD Short circuit Between terminal L and LOAD Short circuit If incorrect readings are obtained replace the noise filter 6 Reconnect all leads removed from components during testing 7 Reinstall the outer case cabinet 8 Reconnect the power supply cord after the outer case is installed 9 Run the oven and check all functions 3 16 Section 4 Component Teardown WARNING To prevent an electric shock take the following precautions l Before wiring A Disconnect the power supply
41. d The time of day should appear on the display with beep sound during normal condition Oven lamp does not light with door is opened Hood fan motor operates when power cord is first plugged into wall receptacle Temperature of oven base seems more than 140 F 60 C because of operation of the range below But hood fan motor does not turn on automatically Normally food fan motor should be operating at mid speed Cook top lamp does not turn on when LIGHT pad DLE is pressed CONDITION OFF CONDITION Hood fan motor does not rotate at all with touched VENT pad Speed of the hood fan motor does not change when the VENT pad is touched for this function Oven lamp does not light in cook cycle But it does light when door is opened Fan motor does not operate Oven lamp and turntable motor operate Turntable motor does not operate Oven lamp lights and fan motor operate Oven does not go into cook cycle when START pad is touched Oven seems to be operating but little or no heat is te Produced in oven load Food incompletely coNDITION cooked or not cooked at all at end of cook cycle Oven goes into a cook cycle but extremely uneven heating is produced in oven load food Variable cooking does not operate properly except Cooking Power 100 mode Function of AUTO DEFROST does not operate properly Antenna motor does not operate Other parts operate Oven goes into AUTO DEFROST b
42. e oven will revert to the OFF condition Section 2 Operation 6 When the door is opened during a cook cycle monitor switch door sensing switch secondary interlock switch and primary interlock relay are activated with the following results The circuits to the antenna motor the cooling fan motor the turntable motor and the high voltage components are de energized and the digital read out displays the time still remaining in the cook cycle when the door was opened 7 The monitor switch is electrically monitoring the operation of the secondary interlock switch and door sensing switch is mechanically associated with the door so that it will function in the following sequence 1 When the door opens from a closed position the primary interlock relay door sensing switch and secondary interlock switch open their contacts and then the monitor switch contacts close 2 When the door is closed from the open position the monitor switch contacts open first Then the contacts of the secondary interlock switch and door sensing switch close And contacts of the relay RY1 open If the secondary interlock switch and primary interlock relay RY2 fail with the contacts closed when the door is opened the closing of the monitor switch contacts will form a short circuit through the monitor fuse secondary interlock switch relay RY1 and primary interlock relay RY2 causing the monitor fuse to blow 2 1 Section 2 Operation
43. e latch hook by pushing the one 1 stopper tub holding each switch 9 Now each switch is free Reinstall 1 Re install each switch in its place The secondary interlock switch is in the lower position door sensing switch is in the upper position and the monitor switch is in the middle position 2 Re connect wire leads to each switch Refer to pictorial diagram 3 Secure the latch hook with two 2 mounting screws to oven cavity front flange 4 Make sure that the monitor switch is operating properly and check continuity of the monitor circuit Refer to section 3 Test Procedure and Adjustment procedure 4 10 Door Sensing Switch Secondary I nterlock Switch And Monitor Switch Adjustment L Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal Open the door and block it open Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver Remove the control panel assembly referring to the procedure of Right Panel Assembly And Power Unit Removal If door sensing switch secondary interlock switch and monitor switch do not oper ate properly due to a misadjustment the
44. e power density of microwave radiation emitted by a microwave oven should not exceed 1 mW cm at any point 5 cm or more from the external surface of the oven measured prior to acquisition by a purchaser and thereafter through the useful life of the oven 5 mW cm2 at any point 5 cm or more from the external surface of the oven Safety interlock switches Primary interlock switch shall prevent microwave radiation emission in excess of the requirement as above mentioned secondary interlock switch shall prevent microwave radiation emission in excess of 5 mW cm at any point 5 cm or more from the external surface of the oven B Preparation for testing Before beginning the actual measurement of leakage proceed as follows 1 4 5 Make sure that the actual instrument is operating normally as specified in its instruction booklet Important Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard for microwave ovens 21 CFR 1030 10 c 3 i must be used for testing Place the oven tray in the oven cavity Place the load of 275x 15 ml 9 8 oz of tap water initially at 20 5 C 68 F in the center of the oven cavity The water container shall be a low form of 600 ml 20 oz beaker with an inside diameter of approx 8 5 cm 3 1 2 in and made of an electrically nonconductive material such as glass or plastic The placing of this standard load in the oven is important not only to
45. ed Make sure that the fan blade rotates smoothly after installation Make sure that the axis of the shaft is not slanted 6 Install the fan duct to the oven cavity base plate right and hood duct with the three 3 screws 7 Connect the high voltage wire leads with high voltage rectifier from the magnetron referring to the pictorial diagram 8 Connect filament lead of the transformer from high voltage capacitor referring to the pictorial diagram 9 Connect high voltage wire from capacitor referring to the pictorial diagram 10 Connect the wire leads to the fan motor referring to the pictorial diagram 11 Refer to procedure of Outer Case Removal and reverse their procedure then re install the outer case 4 8 Antenna Motor Removal 1 Disconnect the power supply cord and remove the oven from wall and outer case Refer to procedure of Removal of Oven from Wall and Outer Case Removal Open the door and block it open Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver Remove the hood duct from the oven cavity refer ring to the procedure of Hood Fan Motor Hood Duct And Oven Lamp Socket Removal Disconnect the wire leads from the antenna motor Remove the one
46. emely high impedance at its input and output terminals For this reason it is easily influenced by the surrounding high voltage power source static electricity charge in clothes etc and sometimes it is not fully protected by the built in protection circuit In order to protect CMOS LSI 1 When storing and transporting thoroughly wrap them in aluminium foil Also wrap all PW boards in aluminium foil 2 When soldering ground the technician and use a grounded soldering iron and work table Servicing of Touch Control Panel The following are procedures to permit servicing of the touch control panel of the microwave oven and the precautions you must take when doing so To perform the servicing power to the touch control panel is available either from the power line of the oven itself or from an external power source Section 4 Component Teardown A Servicing the touch control panel with power supply of the oven AA CAUTION The high voltage transformer of the microwave oven is still live during servicing and presents a hazard Therefore before checking the performance of the touch control panel 1 Disconnect the power supply cord and then remove the outer case 2 Open the door and block it open 3 Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high volt
47. en the door is opened the monitor switch contact close to the ON condition due to their being normally closed At this time the primary interlock relay RY2 secondary interlock switch are in the OFF condition contacts open due to their being normally open contact switches And the contacts of relay RY1 are in the ON condition contacts close 2 As the door goes to a closed position the monitor switch contacts are first opened and then the door sensing switch and the secondary interlock switch contacts close On opening the door each of these switches operate inversely 3 Ifthe door is opened and the primary interlock relay RY2 and secondary interlock switch contacts fail to open the monitor fuse blows simultaneously with closing of the monitor switch contacts CAUTION Before replacing a blown monitor fuse test the door sensing switch primary interlock relay RY2 relay RY1 secondary interlock switch and monitor switch for proper operation Refer to Test Procedure b NOTE Monitor fuse and switch are replaced as an assembly THERMAL CUT OUT CAVI TY This thermal cut out is located on the top of the oven cavity It is designed to prevent damage to the oven unit if the food in the oven catches fire due to overheating produced by improper setting of cooking time or failure of control unit Under normal operation the thermal cut out remains closed However the thermal cut out will open at 293 F 145
48. etion of service Failure to do so will create a hazard Prior to returning the product to service ensure that e All electrical connections are correct and secure e All electrical leads are properly dressed and secured away from sharp edges high temperature components and moving parts e All non insulated electrical terminals connectors heaters etc are adequately spaced away from all metal parts and panels e All safety grounds both internal and external are correctly and securely connected e All panels are properly and securely reassembled 2009 Electrolux Home Products I nc 1 1 Section 1 Basic Information This Manual has been prepared to provide Electrolux Service Personnel with Operation and Service Information for Electrolux Microwave Ovens FPMV189KF FGMV185KB FGMV185KF and FGMV185KW Table of Contents Section 1 Basic Information Safe Servicing Practices senes 1 1 Tapie OP EN 1 2 Warnings and Safety Information 1 3 Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy 1 4 Before Servicing EE 1 4 Danger High Voltage sseseeeennm eme 1 4 Before Seb VICINO EE 1 5 When Testing Is Completed cccccsceceeseeeeereeees 1 5 Microwave Measurement Procedure USA 1 6 Microwave Measurement Procedure Canada 1 7 Product Specification ssp aesti nrbes CEN PERRA RI
49. fter the outer case is installed Run the oven and check all functions MAGNETRON TEMPERATURE FUSE TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 A continuity check across the magnetron temperature fuse terminals should indicate a closed circuit unless the temperature of the magnetron temperature fuse reaches approximately 302 F 150 C An open magnetron temperature fuse indicates overheating of the magnetron Check for restricted air flow to the magnetron especially the cooling fan air guide Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions AA CAUTION If the temperature fuse indicates an open circuit at room temperature replace temperature fuse Section 3 Troubleshooting and Testing Procedure C t Test Letter omponent Tes SECONDARY I NTERLOCK SWITCH TEST Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 Isolate the switch and connect the ohmmeter to the common COM and normally open NO terminal of the switch The meter should indicate an open circuit with the door open and a closed circuit with the door closed If improper operati
50. ge high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver 4 Disconnect the leads to the primary of the power transformer 5 Ensure that the leads remain isolated from other components and oven chassis by using insulation tape WARNING When the testing is completed l Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 To discharge high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver Reconnect the leads to the primary of the power transformer Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions DIR Microwave ovens should not be run empty To test for the presence of microwave energy within a cavity place a cup of cold water on the oven turntable close the door and set the power to HIGH and then set the microwave timer for two 2 minutes When the two minutes has elapsed timer at zero carefully check that the water is now hot If the water remains cold carry out Before Servicing procedure and re examine the connections to the component being
51. hassis support 8 Cutthe wire tie holding the hood fan harness to the hood duct 9 Disconnect the 6 pin connector of hood fan motor from the main wire harness located at the right edge of the hood duct Remove one 1 screw holding the hood intake duct to right base plate Remove one 1 screw holding the hood duct to the hood intake duct right Remove the hood intake duct right Release the snap band from the cavity top plate 10 Disconnect the two 2 grounding wires from the chassis support left 11 Now the hood fan motor is free 12 Remove the one 1 screw holding the noise filter assembly to the fan duct 13 Disconnect the connector CN F and CN D from the control unit 14 Remove one 1 screw holding the hood duct to the oven cavity top plate 15 Remove the one 1 screw holding the hood duct to the fan duct 16 Release the 6 pin connector and the 3 pin connector of the main harness A from the hood duct 17 Disconnect the control harness A from the control harness B 18 Disconnect the connector of control harness A from the cavity face plate 19 20 21 22 23 24 29 20 21 28 Section 4 Component Teardown Remove the hood duct from the oven cavity by lifting it UD Release the snap band of control harness A from the hood duct Release the harness of the sensor assembly and the control harness A from four 4 wire holders of the hood duct Remove two 2 screws holding the se
52. he one 1 screw holding the hood duct to the fan duct and remove the one 1 screw holding the oven cavity top plate to the fan duct 10 Remove the one 1 screw holding the right base plate to the fan duct and remove the fan duct assembly 11 Remove the power transformer from the right base plate referring to Power Transformer Removal 12 Carefully remove four 4 mounting screws holding the magnetron to waveguide When removing the screws hold the magnetron to prevent it from falling 13 Remove the magnetron from the unit with care so the magnetron tube should not be hit by any metal object around the tube AA CAUTION When replacing the magnetron be sure the R F Gasket is in place and mounting screws are tightened securely 4 6 High Voltage Rectifier And High Voltage Capacitor Removal 1 Disconnect power supply cord remove oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer Case Removal 2 Open the door and block it open 3 Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver 4 Disconnect the high voltage wire leads with high voltage rectifier from the magnetron 5 Disconnect filament lead of the transformer fro
53. he touch control transformer with a tester for the presence of layer short circuit check the primary coil resistance which is approximately 110W 10 If any abnormal condition is detected replace the power unit 8 Reconnect all leads removed from components during testing 9 Re install the covers 10 Reconnect the power supply cord after the covers are installed 11 Run the oven and check all functions E LE E Mg Follow the troubleshooting guide given below if indicator does not light up after above check and repairs are finished Disconnect the power supply cord Remove the covers Open the door and block it open Discharge high voltage capacitor Disconnect the leads to the primary of the power transformer Ensure that these leads remain isolated from other components and oven chassis by using insulation tape After that procedure re connect the power supply cord Follow the troubleshooting guide given below for repair oY quoe Der rs xN STEPS OCCURRENCE CAUSE OR CORRECTION The rated AC voltage is not present between Pin No 1 of 1 the 3 pin connector A and the oven side terminal of the Check supply voltage and oven power cord relay RY1 2 The rated AC voltage is present at primary side of touch Touch control transformer or secondary circuit defective control transformer Check and replace the power unit 9 Disconnect the power supply cord and then remove the covers 10 Open the door and block i
54. heck for short or open between the terminals using an ohmmeter Checking with a high ohm scale if the high voltage capacitor is normal the meter will indicate continuity for a short time and should indicate an open circuit once the capacitor is charged If the above is not the case check the capacitor with an ohmmeter to see if it is shorted between either of the terminals and case If it is shorted replace the capacitor Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions THERMAL CUT OUT AND TEMPERATURE FUSE TEST CAVITY THERMAL CUT OUT TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 A continuity check across the thermal cut out terminals should indicate a closed circuit unless the temperature of the thermal cut out reaches approximately 293 F 145 C An open thermal cut out indicates overheating of the oven exchange the oven thermal cut out and check inside of oven cavity and for improper setting of cooking time or operation of control unit Check for restricted air flow through the vent holes of the oven cavity especially the cooling fan and air guide Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord a
55. ie Jo Po H Po o pop EEFE HEEE LL LEE EE LL LL EE E LL LS st eo IN TS o o oo r Jo ui xr 0o fox Ajo 4 4 CN A 1 zn VFD RV KXAO086DRZZ B3P5 VH B RTRNPA164DRZZ 9 aan Cn IN CR I Ch CN B og enum Ze fail Ao o pell Gei rd pt A YAU M CM CH B2P3 VH B Sanat Sansa saa Naf Do Del mn i FA YUU VRUN ii tj Wu DULL CN C VFD C c CS B5P9 VH B nnn 2 f fax Anas PAYA nfren m 8 E ele eae IT Sl ele MT D mio xd d WT EI EI T PI s MIX T T OFF KELES CONV COOKRUP 0 Q70 Q93 i P 100K x12 L 0 8 8 8 8 o Ui RO mg ECH mg FE EE mg FE BE mg FS PS mg FE eee Or e Or Zi eg E LL mmm FE BC H ER Ces Een res SE PTT ECH OO ra RE LES gt BZ emm BZ mmm ECH mmm rs i AVSS ees 0 1u 50V INTO Sg i lU EPEPFEPEEREFRERE Gklkekkkkstokkokek P12 G5NB led Mil UI 14 DC24V pd 15K R71 15K R72 15K R73 15K R74 15K R75 15K R76 R77 M LO oH 34 33 ES 31 30 29 28 27 E EM ei 5 Ed Ed EG c13 timer turn table sensor baked auto snacks 1 4 pop de j a31 Q27 DTA143EK A Ge FLASH SC write program Q20 Q22 Q24 Q27 SC ue DTA143EKA x7 DU24D1 1P M R CF sensor auto keep d reheat corn frost warm A5 moroa LEI cue Kate power RUN 6 8u 230V eve reheat soften POWER UNIT 5597 13CP 7F KEYUNIT A C60 C64 330P 50v
56. inuity of monitor circuit Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions i Re Secondary Interlock Ohmmeter Switch BLOWN MONI TOR FUSE TEST 1 Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 If the monitor fuse is blown when the door is opened check the secondary interlock switch primary interlock relay RY2 relay RY1 and monitor switch according to the TEST PROCEDURE for those switches before replacing the blown monitor fuse CAUTION Before replacing a blown monitor fuse test the secondary interlock switch primary interlock relay door sensing switch and monitor switch for proper operation SE qe If the monitor fuse is blown by improper switch operation the monitor fuse and monitor switch must be replaced with monitor fuse and monitor switch assembly even if the monitor switch operates normally The monitor fuse and monitor switch assembly is comprised of a 20 ampere fuse and switch Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions Sd ELE d 3 7 Section 3 Troubleshoo
57. issipated in the air and if the two thermistors are placed in different humidity conditions they show different degrees of heat conductivity leading to a potential difference between them causing an output voltage from the bridge circuit the intensity of which is increased as the absolute humidity of the air increases Since the output is very minute it is amplified by the operational amplifier humidity vs output voltage Operational characteristic Rl amplifier Output voltage 0 CH B S 4 g O S Thermistor open vessel C Thermistor closed vessel Humidity g m2 Figure 2 5 Humidity Sensor Operation 2 1 Section 2 Operation 3 Detector Circuit of Absolute Humidity Sensor Circuit This detector circuit is used to detect the output voltage of the humidity circuit to allow the LSI to control sensor cooking of the unit When the unit is set in the sensor cooking mode 32 seconds of clearing cycle occurs then the detector circuit starts to function and the LSI observes the initial voltage available at its P65 terminal With this voltage given the switches SW1 to SW5 in the LSI are turned on in such a way as to change the resistance values in parallel with P58 to P62 of IC2 Changing the resistance values results in that there is the same potential at both F 3 terminals of the humidity sensor and P66 terminal of the LSI The voltage of P65 terminal will indicate about 2 5V This initial balancing is set
58. ity etc is not applied to the input or output terminals 4 Attach connectors electrolytic capacitors etc to PWB making sure that all connections are tight 5 Be sure to use specified components where high precision is required 4 4 Power Transformer Removal REMOVAL 1 Disconnect the power supply cord remove the oven from wall and remove outer case Refer to procedure of Removal Of Oven From Wall and Outer Case Removal And proceed as follows 2 Open the door and block it open 3 Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver 4 Disconnect filament leads of transformer from the magnetron and capacitor 5 Disconnect high voltage leads of capacitor from the transformer 6 Remove one 1 screw holding the capacitor holder to fan duct and remove the capacitor Disconnect wire leads from transformer Remove three 3 screws holding the deflector to the cavity face plate and remove the deflector 9 Remove three 3 screws holding the base cover to the cavity face plate and one 1 screw holding the base cover to the cavity back plate and remove the base cover 10 Remove two 2 screws holding the transformer to right base plate co xN RE I NSTALL 1 In
59. ltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver 4 Push the lever of positive locke connector 5 Pull down on the positive locke connector Terminal Positive lock TN Positive Lock amp Connector Figure 4 6 Door Switch Components 4 9 Section 4 Component Teardown Door Sensing Switch Secondary I nterlock Switch And Monitor Switch Removal Removal 1 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal 2 Open the door and block it open 3 Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver 4 Remove the control panel assembly referring to the procedure of Control Panel Assembly Control Unit And Key Unit Removal 5 Remove the two 2 screws holding the latch hook to the oven cavity front flange 6 Remove the latch hook from the oven cavity front flange 7 Disconnect the wire leads of each switch 8 Remove each switch from th
60. m high voltage capacitor 6 Disconnect high voltage wire from capacitor 7 Remove one 1 screw holding capacitor holder and high voltage rectifier to the fan duct 8 Disconnect the high voltage rectifier assembly from the high voltage capacitor and remove one 1 screw holding the voltage rectifier assembly to the capacitor holder 9 Now the high voltage rectifier assembly is free 10 Remove capacitor from the holder 11 Now the high voltage capacitor is free AA CAUTION When replacing the high voltage rectifier assembly the ground side terminal must be secured firmly with a grounding screw Hood Fan Thermostat 609C On Removal 1 Disconnect power supply cord remove oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer Case Removal 2 Open the door and block it open 3 Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver 4 Disconnect the wire leads from the hood fan thermostat 60 C ON 5 Remove one 1 screw holding the thermostat 60 C ON to the right base plate 6 Remove the hood fan thermostat 60 C ON from the right base plate 7 Now the hood fan thermostat 60 C ON is free Thermostat 60 C ON
61. mer oven lamp etc are turned off 6 Opening the door or touching the STOP CLEAR pad the time of day will reappear on the display and the oven will revert to an OFF condition 2 5 Section 2 Operation Component Descriptions DOOR OPEN MECHANI SM The door is opened by pulling the door handle refer to the Figure 2 3 Sensing Switch Monitor Switch Secondary Interlock Switch Figure 2 3 Door Open Mechanism DOOR SENSI NG AND SECONDARY INTERLOCK SWITCH The secondary interlock switch is mounted in the lower position of the latch hook the door sensing switch in the primary interlock system is mounted in the upper position of the latch hook is mounted on upper position of the latch hook They are activated by the latch heads on the door When the door is opened the switches interrupt the circuit to all components A cook cycle cannot take place until the door is firmly closed thereby activating both interlock switches The primary interlock system consists of the door sensing switch and primary interlock relay located on the control circuit board 2 0 MONI TOR SWITCH The monitor switch is activated the contacts opened by the latch head on the door while the door is closed The switch is intended to render the oven inoperative by means of blowing the monitor fuse when the contacts of the primary interlock relay RY2 and secondary interlock switch fail to open when the door is opened Functions 1 Wh
62. n 6 Parts List REF NO DESCRIPTION OVEN PARTS Hood duct Rack holder Barrier HVT cushion Cushion Base plate right Rack holder L Rack holder R Accessory assembly Grommet Special screw Hood motor assembly Machine screw Tapping screw Washer Hood lamp reflector Menu label Cushion Cushion DHHS ground caution Monitor caution Filter Mesh filter Canoe clip Rack Filter Cushion Unit mounting plate SCREWS WIRE HOLDER Screw 4mm x 8mm FPMV189KF FGMV185KF FGMV185KB Screw 4mm x 8mm FGMV185KW Screw 3mm x 8mm Screw 4mm x 8mm Screw 4mm x 8mm Screw 4mm x 8mm Screw 4mm x 12mm Screw 4mm x 8mm Screw 4mm x 12mm Screw 3mm x 6mm Special screw Screw 4mm x 8mm Wire holder Section 6 Parts List Oven Parts o 3 o JE N KN SEA 76 5 766 Section 6 Parts List Control Panel Parts REF NO DESCRIPTION Control Panel Parts 112 210 Control unit Panel sub assembly FPMV189KF Panel sub assembly FPMV185KF Control panel FGMV185KW Control panel FGMV185KB Key fixing plate Screw 3mm x 8mm Screw 3mm x 8mm Earth wire Main wire harness Key sheet FPMV189KF Key sheet FGMV185KF FGMV185KB Key sheet FGMV185KW FPC D EELS d B EE V Es NN Door Parts FGMV185KW amp FGMV185KB Section 6 Parts List DOOR P
63. nd door when door is open Re install outer case and check for microwave leakage around door with an approved microwave survey meter Refer to Microwave Measurement Procedure Sensing Switch Monitor Switch Secondary Interlock Switch Figure 4 7 Door Disassembly Section 4 Component Teardown Door Replacement Removal 1 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer case Removal Open the door and block it open Discharge high voltage capacitor k NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver 4 Remove the hood louver from the oven Refer to the procedure of Hood Louver Removal 5 Insert a putty knife thickness of about 0 5mm into the gap A between the door stopper and the choke cover as shown in Figure 4 9 to free engaging parts 6 Lift up the door stopper 7 Door stopper is now free from the door assembly 8 Lift up the door assembly to release the upper and lower door hinge pins from the upper and lower oven hinges 9 Now the door assembly is free b NOTE When the individual parts are replaced refer to Door Disassembly Reinstall 1 On re installing door insert
64. ne if control unit is faulty 1 In connection with indicators a At a certain digit all or some segments do not light up b At a certain digit brightness is low Only one indicator does not light The corresponding segments of all digits do not light up or they continue to light up Wrong figure appears f A certain group of indicators do not light up g The figure of all digits flicker 2 Other possible problems caused by defective control unit a Buzzer does not sound or continues to sound b Clock does not operate properly c Cooking is not possible 3 Power Unit or Touch Control Transformer a Fan motor stirrer motor oven lamp or electrical parts do not turn on or do not turn off b Digital display on the control unit does not show anything C d e When testing is completed 1 Disconnect the power supply cord and then disassemble as per HOOD LOUVER REMOVAL REMOVAL OF OVEN FROM WALL and OUTER CASE REMOVAL Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 Reconnect all leads removed from components during testing Re install the covers outer case cabinet and control unit cover Reconnect the power supply cord after the covers are installed Run the oven and check all functions 3 10 Section 3 Troubleshooting and Testing Procedure Letter Component Test KEY UNIT FPC TEST Disconnect the power supply cord and then remove o
65. nsor assembly to the hood duct Now the sensor assembly is free Lift the oven lamp cover up and remove the oven lamp cover from hood duct Remove the oven lamp Refer to the procedure of Oven lamp removal Disconnect the wire leads from the oven lamp socket Rotate the oven lamp socket to remove from hood duct Now the oven lamp socket Is free Hood fan duct Hood fan motor harness Top view of the microwave oven Figure 4 2 Top View Of The Microwave Oven 4 5 Section 4 Component Teardown Magnetron Removal 1 Disconnect power supply cord remove oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer Case Removal 2 Open the door and block it open 3 Discharge high voltage capacitor bL NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver 4 Remove two 2 screws holding the chassis support right to the rear and face of the oven cavity flanges 5 Remove the one 1 screw holding the noise filter assembly to the fan duct 6 Disconnect the wire leads from the fan motor 7 Disconnect the high voltage wire leads of the high voltage rectifier assembly from the magnetron 8 Disconnect the filament lead of the transformer from the magnetron 9 Remove t
66. nt Touch Control System Clock 1 00 12 59 Timer 0 99 min 99 seconds Microwave Power for Variable Cooking Repetition Rate P HI Full power throughout the cooking time P 90 approx 90 of Full Power P 80 approx 80 of Full Power P 70 approx 70 of Full Power P 60 approx 60 of Full Power P 50 approx 50 of Full Power P 40 approx 40 of Full Power P 30 approx 30 of Full Power P 20 approx 20 of Full Power P 10 approx 10 of Full Power P 0 No power throughout the cooking time Light Hi Lo Off pad Vent Hi Lo Off pad Sensor Cook pad Sensor Reheat pad Auto Cook pad Auto Defrost pad Chicken nuggets pad Auto reheat pad Timer on off pad User Pref pad Keep Warm pad Melt Soften pad Snacks Menu pad Popcorn pad Veggies pad Baked Potato pad Power level pad Turntable on off pad STOP Clear pad START Enter 30sec pad Number pads Quick start pads Safety Standard UL Listed FCC Authorized DHHS Rules CFR Title 21 Chapter 1 Subchapter J Canadian Standards Association Health CANADA Industry Canada Section 1 Basic I nformation Grounding Instructions This oven is equipped with a three prong grounding plug It must be plugged into a wall receptacle that Is properly installed and grounded in accordance with the National Electrical Code local codes and ordinances In the event of an electrical short circuit grounding reduces the risk of electric shock by providing an escape wire for the electric current
67. nto the customer s vent system the percentage of microwave power because approximately 2 seconds are needed for heating of Air Flow the magnetron filament Hood Fan Motor POWER OUTPUT REDUCTI ON If the oven is set for over 40 minutes at 8096 9096 or 100 power level after the first 40 minutes the power level will automatically adjust itself to 70 power to Filter avoid overcooking 3 Re circulation Inside venting The air handing is the same as VERTICAL VENTING except that the final air discharge is directed horizontally through the upper front of the oven into the kitchen In this case the charcoal filter must be used which have already been installed in the oven Air Flow Hood Exhaust charcoal Hood Fan Motor Louver Filter 2 4 SENSOR COOKI NG CONDI TI ON Using the SENSOR function the foods are cooked without figuring time power level or quantity When the oven senses enough steam from the food it relays the information to its microprocessor which will calculate the remaining cooking time and power level needed for best results When food is cooked water vapor is developed The sensor senses the vapor and its resistance increases gradually When the resistance reaches the value set according to the menu supplementary cooking is started The time of supplementary cooking is determined by experiments with each food category and inputted into the LSI An example of how the sensor works BAKED
68. ocedure Letter Component Test P TESTING METHOD FOR HUMIDITY SENSOR AND OR CONTROL UNIT To determine if the sensor is defective the simplest method is to replace it with a new replacement Sensor 1 Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 Remove the humidity sensor Install the new humidity sensor Reconnect all leads removed from components during testing Re install the outer case cabinet Reconnect the power supply cord after the outer case is installed Reconnect the oven to the power supply and check the sensor cook operation as follows a Fill approximately 200 milliliters of tap water in a 1000 milliliter measuring cup b Place the container on the center of tray in the oven cavity c Close the door d Touch the Timer On Off pad once the POWER LEVEL pad twice and the START pad once And touch the number pads 1 once and the number pad 2 once e The control panel is in automatic Sensor operation f The oven turns off automatically and the time for detecting moisture will be displayed If new sensor dose not operate properly the problem is with the control unit refer to explanation below STE a WIL wee ter qe CHECKING CONTROL UNIT Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor See Warnings
69. on is indicated replace the secondary interlock switch Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions PRI MARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor See Warnings and Instructions on page 3 1 4 Isolate the switch and connect the ohmmeter to the common COM and normally open NO terminal of the switch The meter should indicate an open circuit with the door open and a closed circuit with the door closed If improper operation is indicated replace the door sensing switch Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions CAUTION If the door sensing switch contacts fail in the open position and the door is closed the cooling fan motor stirrer motor and oven light will be activated by RY1 o 0 Uu PRIMARY INTERLOCK RELAY RY2 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect two 2 wire leads from the male tab terminals of the Primary Interlock Relay Check
70. onconductive material such as glass or plastic The placing of this standard load in the oven is important not only to protect the oven but also to insure that any leakage is measured accurately 4 Setthe cooking control on Full Power Cooking Mode 5 Close the door and select a cook cycle of several minutes If the water begins to boil before the survey is completed replace it with 275 ml of cool water C Leakage test with enclosure installed 1 Grasp probe of survey instrument and hold it perpendicular to gap between door and the body of the oven 2 Move the probe slowly not faster than 2 5 cm sec along the gap watching for maximum indication on meter 3 Check for leakage at the door screen sheet metal seams and other accessible positions where continuity of the metal has been breached eg around the switches indicator and vents While testing for leakage around door pull door away from the front of the oven as far as is permitted by the closed latch assembly 4 Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4 mW cm2 and that the primary interlock switch and secondary interlock switch do turn the oven OFF before any door movement D Leakage test without enclosure 1 Remove the enclosure cabinet 2 Grasp the probe of the survey instrument and hold it perpendicular to all mechanical and electric parts of the oven that is accessible to the user of the oven including
71. onnect the power supply cord vey du KEY UNIT 1 Check Key unit connection before replacement 2 Reconnect all leads removed from components during testing 3 Re install the covers outer case cabinet and control unit cover 4 Reconnect the power supply cord after the covers outer case cabinet and control unit cover are installed 5 Run the oven and check all functions The following symptoms indicate a defective key unit a When touching the pads a certain pad produces no signal at all b When touching a number pad two figures or more are displayed c When touching the pads sometimes a pad produces no signal If the key unit is defective 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor See Warnings and Instructions on page 3 1 4 Remove the control unit cover 5 Replace the key unit FPC key sheet 6 Reconnect all leads removed from components during testing 7 Re install the covers outer case cabinet and control unit cover 8 Reconnect the power supply cord after the covers outer case cabinet and control unit cover are installed 9 Run the oven and check all functions 3 9 Section 3 Troubleshooting and Testing Procedure Letter Component Test CONTROL UNIT The following symptoms indicate a defective control unit Before replacing the control unit perform the Key unit test Procedure M to determi
72. onnect the three 3 pin connector of the power supply cord from the wiring harness and remove the power supply cord together with the outer case 8 Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver Control Panel Assembly And Control Unit Removal 1 Disconnect the power supply cord 2 Open the door and block it open 3 Remove the hood louver from the oven Refer to procedure of Hood Louver Removal 4 Remove one 1 screw holding the control panel to the oven cavity front face plate 5 Release the control panel from the oven cavity front face plate by lifting it up 6 Disconnect the wire leads from the relays RY1 and RY2 7 Disconnect the connectors CN A CN B CN C CN D CN E and CN F from the control unit 8 Remove the control panel assembly from the oven Now the control panel assembly is free 10 Remove four 4 screws holding the power unit to the key fixing plate and control panel 11 Now the control unit is free ad Servicing The Touch Control Panel Precautions For Handling Electronic Components This unit uses CMOS LSI in the integral part of the circuits When handling these parts the following precautions should be strictly followed CMOS LSI have extr
73. ontrol Panel Assembly And Control Unit Removal 4 3 Servicing The Touch Control Panel 4 3 Power Transformer Removal ssssssssisrerrerrrrrrrrrrrern 4 4 Hood Fan Motor Hood Duct Oven Lamp Socket And Humidity Sensor Remowval 4 5 Magnetron REMOVAL E 4 6 High Voltage Rectifier And High Voltage Hood Fan Thermostat 602C On Removal 4 7 Cooling Fan Motor Removal ssssssesssesrsrrrrerrrrerrrrens 4 7 Antenna Motor Removal c cccecsesecereeeeeeeeeeeaeeess 4 9 Stirrer Cover And Stirrer Antenna Installation 4 9 Oven Lamp Removal 4 9 Positive Lock amp Connector No Case Type 4 9 Door Sensing Switch Secondary Interlock Switch And Monitor Switch Removal 4 10 Door Sensing Switch Secondary Interlock Switch And Monitor Switch Adjustment 4 10 Door Replacement men 4 11 DOS DisasseMDl y E 4 12 Turntable Motor Removal sssssssssrrererrrrrrrrrerrrrern 4 13 Cook Top Lamp Socket Removal sisssssrererrrrerrres 4 13 Section 5 Wire Diagrams Wiring Schematic Oven ON Condition 5 1 Pictorial Component Diagram s ssssssrssrrrrrrrrrrrrrrn 5 2 Wiring Be RS in m 5 3 Section 6 Parts List Pals LENO E 6 1 Oven And Cabinet Parts Exploded View 6 3 Control Panel Exploded View 6 4 Door Parts FGMV185KW amp FGMV185KB 6 5 Door Parts FGMV185KF amp FGMV189KF
74. owave oven will not operate unless the door is securely closed 8 Handle 9 Light Hi Lo Off pad Press the Light Hi Lo Off pad once for high twice for low and three times to turn off the light 10 Vent Hi Lo Off pad Press the Vent Hi Lo Off pad once for high speed twice for low speed and three times to turn off the fun Front View C 15 G Ek L 13 14 15 16 17 18 19 Bottom View TS 17 Front of microwave oven 18 Rear of microwave oven 1 10 Control panel Time display Digital display 99 minutes 99 seconds Ventilation openings Removable turntable The turntable will rotate clockwise or counterclockwise Only remove for cleaning Removable turntable support First carefully place the turntable support in the motor shaft in the center of the microwave oven floor Then place the turntable on the turntable support securely Rack for 2 level cooking reheating Light cover Grease filters Menu label 11 i turn table user on off pref sensor sensor chicken cook reheat nuggets baked potato veggies auto auto auto cook defrost reheat snacks keep melt menu warm soften bod quick start 4 s ee 7 8 9 e 0 o START enter 30 sec power Level Operating Sequence Description The following is a description of component functions during oven operation OFF CONDI TI ON Closing the door activate
75. protect the oven but also to insure that any leakage is measured accurately Set the cooking control on Full Power Cooking Mode Close the door and select a cook cycle of several minutes If the water begins to boil before the survey is completed replace it with 275 ml of cool water C Leakage test Closed door leakage test microwave measurement 1 2 Grasp the probe of the survey instrument and hold it perpendicular to the gap between the door and the body of the oven Move the probe slowly not faster than 1 in sec 2 5 cm sec along the gap watching for the maximum indication on the meter Check for leakage at the door screen sheet metal seams and other accessible positions where the continuity of the metal has been breached eg around the switches indicator and vents While testing for leakage around the door pull the door away from the front of the oven as far as is permitted by the closed latch assembly Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4 mW cm2 and that the primary interlock switch and secondary interlock switch do turn the oven OFF before any door movement NOTE After servicing record data on service invoice and microwave leakage report 1 6 Section 1 Basic Information Microwave Measurement Procedure Canada After adjustment of the door switches are completed individually or collectively switch test and microwave leakage test
76. putty knife thickness of about 0 5mm into the gap A between the choke cover and door stopper and between the choke cover and the door frame as shown Figure 4 9 to free engaging parts 8 Pry the choke cover by inserting a putty knife in order shown in Figure 4 9 9 Now choke cover is free from door panel and door frame Latch Spring Latch Head And Door Panel 1 0 Release the latch spring from the tab of the latch head and tab of the door panel 11 Release the latch head from the door panel 12 Now the latch spring latch head and door panel are free Door Frame Assembly 13 Remove eight 8 screws holding the door panel to the door frame assembly 14 Release the door frame assembly from the door panel k NOTE It is easier to release the engaging parts of the upper or lower door hinge pin side at first 15 Now door frame assembly is free A ez Door Stopper X Figure 4 9 Door Disassembly Section 4 Component Teardown Turntable Motor Removal 1 Disconnect the power supply cord 2 Open the door and block it open 3 Remove the three 3 screws holding the deflector to the cavity face plate 4 Remove the four 4 screws holding the base cover to the oven cavity 5 Remove the base cover from the oven cavity by pulling down and moving to the left slightly 6 Disconnect the wire leads from the turntable motor 7 Remove one 1 screw holding turntable motor to the oven cavity
77. rcuit This circuit generates a signal which resets the LSI IC1 to the initial state when power is supplied 5 Indicator Circuit Indicator element is Fluorescent Display Basically a Fluorescent Display is triode having a cathode a grid and an anode Usually the cathode of a Fluorescent Display is directly heated and the filament serves as cathode The Fluorescent Display has 8 digits 16 segments are used for displaying figures 6 Power Source Circuit This circuit generates voltages necessary in the control unit from the AC line voltage In addition the synchronizing signal is available in order to compose a basic standard time in the clock circuit Symbol Voltage Application VC 5V LSI IC1 10 11 Section 2 Operation Relay Circuit A circuit to drive the magnetron fan motor antenna motor hood motor and light the oven lamp and cook top lamp Buzzer Circuit The buzzer is responsive to signals from the LSI to emit audible sounds key touch sound and completion sound Synchronizing Signal Circuit The power source synchronizing signal is available in order to compose a basic standard time in the clock circuit It accompanies a very small error because it works on commercial frequency Door Sensing Switch A switch to tell the LSI if the door is open or closed Humidity Sensor Circuit This circuit detects moisture of the cooking food to allow its automatic cooking 2 3 Section 2 Operation POWER L
78. rowave emissions level is in excess of the specified limit contact ELECTROLUX HOME PRODUCTS INC immediately If the unit operates with the door open service person should 1 Tell the user not to operate the oven 2 Contact Electrolux HOME PRODUCTS INC and Food and Drug Administration s Center for Devices and Radiological Health immediately Service personnel should inform ELECTROLUX HOME PRODUCTS INC of any certified unit found with emissions in excess of 4mW cm2 The owner of the unit should be instructed not to use the unit until the oven has been brought into compliance Danger High Voltage Do not energize a microwave oven with the outer case cabinet removed because a microwave oven generates high voltage in the circuit If you intend to operate the oven employing the high frequency switching power converter circuit you should take special precautions to avoid an electrical shock hazard The high voltage transformer high voltage capacitor and high voltage diode have energized high voltage potential of approximately 8KV The aluminium heat sink is connected to the switching power transistor collector pole and has an energized high voltage potential of approximately 650V peak DO NOT ACCESS THE HI GH VOLTAGE TRANSFORMER HI GH VOLTAGE CAPACI TOR HI GH VOLTAGE DI ODE AND HEAT SI NK WHEN THE POWER SUPPLY IS CONNECTED TO AN ELECTRI CAL OUTLET 1 4 WARNING Microwave ovens contain circuitry capable of producing ve
79. ry before operating the oven Do not operate the oven if any of the following conditions exist Door does not close firmly Door hinge support or latch hook is damaged The door gasket or seal is damaged The door is bent or warped There are defective parts in the door interlock system There are defective parts in the microwave generating and transmission assembly There is visible damage to the oven Do not operate the oven l Without the RF gasket Magnetron 2 If the wave guide or oven cavity are not intact 3 If the door is not closed 4 If the outer case cabinet is not fitted DUUM NM I a AA CAUTION Disconnect oven from power supply before removing outer case Discharge high voltage capacitor before touching any oven components or wiring after removing outer case 4 1 Section 4 Component Teardown b NOTE The following adjustments or component replacement can be performed without removing the oven from the wall Cook top lamps sockets and grease filter Oven lamp base cover and lamp glass assembly Turntable motor Hood louver Control panel assembly or components Stirrer cover and stirrer antenna E e tpe Removal Of Oven From Wall Two persons recommended to remove the oven 1 Disconnect and uncoil the power supply cord 2 Remove the turntable tray and support from the oven cavity 3 While supporting the front of the oven unfasten the two 2 screws holding the oven to unit mounting
80. ry high voltage and current contact with THE following parts may result in a severe possibly fatal electrical shock Inverter unit that includes High Voltage Capacitor High Voltage Power Transformer High Voltage Rectifier Heat sink etc and Magnetron High Voltage Harness etc Read the Service Manual carefully and follow all instructions Before Servicing 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver Whenever troubleshooting is performed the power supply must be disconnected t may in some cases be necessary to connect the power supply after the outer case has been removed in this event 1 Disconnect the oven power supply cord and then remove the outer case Open the door and block it open Discharge high voltage capacitor Disconnect leads to the primary of the inverter unit Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure reconnect the power supply cord E E oc Section 1 Basic Information Don t Touch Danger High Voltage When Testing Is Completed 1 Di
81. s in the next operation automatically When the LSI starts to detect the initial voltage at P65 terminal 32 seconds after the unit has been put in the Sensor Cooking mode if it is not possible to balance the bridge circuit due to disconnection of the humidity sensor ERROR will appear on the display and the cooking is stopped Humidity sensor circuit C Thermistor in closed vessel S Thermistor in open vessel VA 15V VA 15V VC 5V Section 3 Troubleshooting and Testing Troubleshooting Guide When troubleshooting the microwave oven it is helpful to follow the Sequence of Operation in performing the checks Many of the possible causes of trouble will require that a specific test be performed These tests are given a procedure letter which will be found in the Test Procedure section AA CAUTION If the oven becomes inoperative because of a blown monitor fuse check the monitor switch relay RY1 primary interlock relay RY2 door sensing switch and secondary interlock switch before replac ing the monitor fuse If the monitor fuse is replaced the monitor switch must also be replaced WARNING Whenever troubleshooting is performed with the power supply cord disconnected It may in some cases be necessary to connect the power supply cord after the outer case has been removed in this event l Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 To dischar
82. s the stop switch primary interlock switch and secondary interlock switch In this condition the monitor switch contacts are opened When oven is plugged in 120 volts AC is supplied to the control unit Figure 2 1 1 The display will show ENJOY YOUR OVEN PRESS CLEAR To set any program or set the clock you must first touch the CLEAR OFF button The display will clear and appears COOKI NG CONDI TI ON Program desired cooking time touching the NUMBER pads When the START pad is touched the following operations occur 1 The contacts of relays are closed and components connected to the relays are turned on as follows For details refer to Figure 2 2 RELAY CONNECTED COMPONENTS RY1 Oven Lamp Fan motor Antenna motor RY2 Power Transformer RY6 Turntable motor 2 120 volts AC is supplied to the primary winding of the power transformer and is converted to about 3 3 volts AC output on the filament winding and approximately 2000 volts AC on the high voltage winding 3 The filament winding voltage heats the magnetron filament and the H V winding voltage is sent to a voltage doubler circuit 4 The microwave energy produced by the magnetron is channeled through the waveguide into the cavity feedbox and then into the cavity where the food is placed to be cooked 5 Upon completion of the cooking time the power transformer oven lamp etc are turned off and the generation of microwave energy is stopped Th
83. sconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver 4 Reconnect leads to the primary of the inverter unit Reinstall the outer case cabinet 6 Reconnect the power supply cord after the outer case Is installed 7 Run the oven and check all functions UT After repairing 1 Reconnect all leads removed from components during testing 2 Reinstall the outer case cabinet 3 Reconnect the power supply cord after the outer case is installed 4 Run the oven and check all functions Microwave ovens should not be run empty To test for the presence of microwave energy within a cavity place a cup of cold water on the oven turntable close the door and set the power to HIGH and then set the microwave timer for two 2 minutes When the two minutes has elapsed timer at zero care fully check that the water is now hot If the water remains cold carry out Before Servicing procedure and re examine the connections to the component being tested 1 5 Section 1 Basic Information Microwave Measurement Procedure USA A Requirements 1 Microwave leakage limit Power density limit Th
84. stall by sliding the transformer on the right base plate with its primary terminals toward the fan duct 2 Secure the transformer with two 2 screws to right base plate 3 Re connect wire leads primary and high voltage to the transformer and filament leads of transformer to magnetron and high voltage capacitor Refer to Pictorial Diagram Re install the capacitor Re install the base cover and the deflector 6 Re install the outer case and check that oven is operating properly CAUTION Make sure the wire leads never touch the fan blade pa ge Hood Fan Motor Hood Duct Oven Lamp Socket And Humidity Sensor Removal 1 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of Removal of Oven from Wall and Outer Case Removal 2 Open the door and block it open 3 Discharge high voltage capacitor b NOTE To discharge the high voltage capacitor wait for 60 seconds and then short circuit the connection of the high voltage capacitor that is the connecting lead of the high voltage rectifier against the chassis with the use of an insulated screwdriver 4 Remove the hood louver refer to procedure of Hood Louver Removal 5 Remove two 2 screws holding the chassis support right to the rear and face of the oven cavity flanges 6 Remove two 2 screw holding chassis support left to the rear flange and face of the oven cavity flanges 7 Remove both c
85. sults will indicate if the magnetron tube has low power output low rise in water temperature which would extend cooking time or high power output high rise in water temperature which would reduce cooking time Because cooking time can be adjusted to compensate for power output the magnetron tube assembly should be replaced only if the water temperature rise test indicates a power output well beyond the normal limits The test is only accurate if the power supply line voltage is 120 volts and the oven cavity is clean 3 3 Section 3 Troubleshooting and Testing Procedure Letter Component Test POWER TRANSFORMER TEST WARNING Do not touch the components of the power transformer while power transformer is energized It is dangerous because this has high voltage components High voltages are present at the high voltage terminal so do not attempt to measure the filament and high voltage Disconnect the power supply cord and then remove outer case Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 Disconnect the primary input terminals and measure the resistance of the transformer with an ohmmeter Check for continuity of the coils with an ohmmeter On R x 1 scale the resistance of the primary coil should be less than 1 ohm and the resistance of the high voltage coil should be approximately 85 ohms the resistance of filament coil should be less than 1 ohm Reconnect all le
86. t open 11 Discharge high voltage capacitor See Warnings and Instructions on page 3 1 12 Reconnect all leads removed from components during testing 13 Re install the covers 14 Reconnect the power supply cord after the covers are installed 15 Run the oven and check all functions 3 13 Section 3 Troubleshooting and Testing Procedure Letter Component Test HUMI DI TY SENSOR TEST Checking the initial sensor cooking condition WARNING The oven should be fully assembled before following procedure 1 The oven should be plugged in at least two minutes before sensor cooking 2 Room temperature should not exceed 95 F 35 C 3 The unit should not be installed in any area where heat and steam are generated The unit should not be installed for example next to a conventional surface unit Refer to the Installation Section 4 Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity To permit adequate ventilation be sure to install so as not to block these vents There should be some space for air circulation 5 Besure the exterior of the cooking container and the interior of the oven are dry Wipe off any moisture with a dry cloth or paper towel 6 The Sensor works with food at normal storage temperature For example chicken pieces would be at refrigerator temperature and canned soup at room temperature 7 Avoid using aerosol sprays or cleaning solvents near the
87. tested When all service work is completed and the oven is fully assembled the microwave power output should be checked and a microwave leakage test should be carried out 3 1 Section 3 Troubleshooting and Testing CK Check RE Replace TEST PROCEDURE A B C D E F G HE 1 2 K L MI N N N N N N O RERERERRE CKRE CK ck RE CK ck Q P z v I V T x Ex Iriijo xmimimimimvinmioimiadi iaioi rz oizir un gt Ole malololololo nm immimimimimelz gt el2lclolos lt 6l0l6 z g O S QI T Z 210012 lt oo Lag ee er LEES tests gert ei ad Elg moO Z m 21215150 9 3 lt 121212121212111212122 4 710 Z 210 lt 1n d d a9 S 7 7 D 2 5 5 Z 4 w l gt w 0l0o g m n md OB O 2 5 Dld ul al Il Z RE E Ee lt KE Oje r uv 40 zz gt pe C el abs os ca a el FE S Lm zis gt ar 2 m lt al Gl x az ei BEE EES O KG ZZ mio Zm G gt zm S m i Uim dsoz2mJsgm T O Si lt Oojo OZIO m c Oo mio e Ze o d 7 o9ze9 o UP 7 22 gt 7 2 e z eig mA m 3 S gt Cls OU gt O d m r 7 Am m Of CH A Z u Oo m H On o rm 2OoSZizae UE o 38 d E v 7 O O 7 2 10 g Z Su A CH TU T wo CONDITION PROBLEM Home fuse blows when power cord is plugged into wall receptacle Monitor fuse blows when power cord is plugged into wall receptacle Display does not illuminate when power cord is first plugged into wall receptacle Display does not operate properly when STOP CLEAR key is touche
88. the lower oven hinge to lower door hinge pin 2 Insert the upper oven hinge to the upper door hinge pin 3 Shut the door close the contacts of interlock switches 4 Make sure upper and lower oven hinges are inserted into the upper an lower door hinge pins 5 Make sure the door is parallel with oven face lines left and upper side lines and door latch heads pass through latch holes correctly 6 Re install the door stopper to the door assembly 7 Re install the hood louver to the oven cavity front face plate 4 1 Section 4 Component Teardown b NOTE After any service to the door 1 Make sure that door sensing switch and secondary interlock switch are operating properly Refer to section 3 Test Procedures 2 An approved microwave survey meter should be used to assure compliance with proper microwave radiation emission limitation standards After any servicing make sure of the following L Door latch heads smoothly catch latch hook through latch holes and that latch head goes through center of latch hole Deviation of door alignment from horizontal line of cavity face plate is to be less than 1 0mm Door is positioned with its face pressed toward cavity face plate 4 Re install outer case and check for microwave leakage around door with an approved microwave survey meter Refer to Microwave Measurement Procedure b NOTE The door on a microwave oven is designed to act as an electronic se
89. ting and Testing Procedure Letter Component Test HOOD THERMOSTAT TEST THERMOSTAT 60 C ON 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor See Warnings and Instructions on page 3 1 4 A continuity check across the thermal cut out terminals should indicate an open circuit unless the temperature of the thermal cut out reaches approximately 140 F 60 C or more At that temperature the contacts will close The thermal cut out opens automatically at approximately 113 F 45 C Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions sta a HOOD FAN MOTOR TEST Disconnect power supply cord and remove outer case Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 If the motor does not turn touch the Vent Hi Lo Off pad once set hood fan motor power HIGH and check voltage between pins 1 and 2 Blue and Black wires of the 6 pin connector If 120 Volts appear and the hood capacitor is good replace the hood fan assembly If 120 Volts does not appear check the motor circuit The resistance values of motor terminals are shown below Reconnect all leads removed from components during testing Reinstall the outer case cabinet
90. ut food is not defrosted well The oven stops and ERROR is displayed or sensor Goes not end during Sensor Cooking condition cooknG Oven does not shut off after a cup of water is CONDITION boiling by Sensor Cooking Oven stops at 32 seconds after starting ITT e j je 3 2 Section 3 Troubleshooting and Testing Test Procedures Procedure Letter Component Test MAGNETRON ASSEMBLY TEST WARNING High voltages are present during the cook cycle so extreme caution should be observed Discharge the high voltage capacitor before touching any oven components or wiring 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor See Warnings and Instructions on page 3 1 4 To test for an open filament isolate the magnetron from the high voltage circuit A continuity check across the magnetron filament leads should indicate less than 1 ohm To test for a shorted magnetron connect the ohmmeter leads between the magnetron filament leads and chassis ground This test should indicate an infinite resistance If there is little or no resistance the magnetron is grounded and must be replaced Reconnect all leads removed from components during testing Reinstall the outer case cabinet Reconnect the power supply cord after the outer case is installed Run the oven and check all functions xd O o ZS MICROWAVE
91. uter case Open the door and block it open Discharge high voltage capacitor See Warnings and Instructions on page 3 1 Disconnect the leads to the primary of the power transformer Remove the control unit cover Ensure that these leads remain isolated from other components and oven chassis by using insulation tape After that procedure re connect the power supply cord If the display fails to clear when the Clear Off pad is depressed first verify the flat ribbon cable is making good contact verify that the door sensing switch stop switch operates properly that is the contacts are closed when the door is closed and open when the door is open If the door sensing switch stop switch is good disconnect the flat ribbon cable that connects the key unit to the control unit and make sure the door sensing switch is closed either close the door or short the door sensing switch connector Use the Key unit matrix indicated on control panel schematic and place a jumper wire between the pins that correspond to the Clear Off pad making momentary contact If the control unit responds by clearing with a beep the key unit FPC is faulty and must be replaced If the control iti ti ROUE Paper TE sensor baked auto mm If a specific pad does not celle ee 11417 150 sec sensor auto k xod eanne mowed HEN mm ames e 2151810 may be used after clearing e power O the control unit to determine aL RIS f the control unit or key pad JE RRE ess
92. x5 R60 R64 270K x5 lt NOTE gt IF NOT SPECIFIED NS LSE UNIT 0 01uF 50V DOOR SW ERU AN LSE UNIT 1 10W 5 E Bt POWER UNIT 188355 DPWB A747DRKZ 2 2 Section 5 Wiring Diagrams Notes Section 6 Parts List ELECTRICAL PARTS H V rectifier HV capacitor Turntable motor Antenna motor Thermal cut out 60C Hood fan Power transformer Magnetron Secondary Interlock and door sensing switches Monitor switch D3V1G 2C25 and fuse assembly 20A 250V Power supply cord Lamp socket Hood motor assembly Fan motor Noise filter Thermal cut out Oven Humidity sensor assembly DM 150V fuse Magnetron Damper motor Oven light cook top lamp oven lamp VD zl oy U1 P A nN rn Schematic diagram Lamp glass assembly Hood lamp glass ag black Lamp glass Lamp mounting angle Rear stay Base cover Lamp cover Fan duct Unit mounting plate Screw 3mm x 8mm Damper assembly Outer case cabinet FPMV189KF FPMV185KF FGMV185KB FGMV185KW Turntable HV capacitor band Stirrer cover Stirrer antenna assembly Roller assembly TTM packing Latch hook Harness cover Fan blade Cord bushing Hood louver assembly FPMV189KF FPMV185KF FGMV185KB FGMV185KW Hood intake duct R Cushion Lamp filter Chassis support Deflector FPMV189KF FPMV185KF FGMV185KB FGMV185KW NOTE Parts marked may cause undue microwave exposure Parts marked A are used in voltage more than 250V 6 1 Sectio

FGMV185KB Serial

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