Electrolux FMV156EMC Service Manual

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In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specifi ed should

be used.

WARNING TO SERVICE PERSONNEL: Microwave ovens contain circuitry capable of producing very high voltage and

current. Contact with the following parts may result in a severe, possibly fatal, electrical shock. (High Voltage Capaci-

tor, High Voltage Power Transformer, Magnetron, High Voltage Rectifi er Assembly, High Voltage Harness etc..)

PREcAUtIoNS to BE oBSERVED BEFoRE AND DURING SERVIcING to

AVoID PoSSIBlE ExPoSURE to ExcESSIVE MIcRoWAVE ENERGY . .................... INSIDE FRoNt coVER

BEFoRE SERVIcING ....................................................................................................... INSIDE FRoNt coVER

WARNING to SERVIcE PERSoNNEl . ................................................................................................................ 3

MIcRoWAVE MEASUREMENt PRocEDURE . .................................................................................................... 4

FoREWoRD AND WARNING ............................................................................................................................... 5

PRoDUct SPEcIFIcAtIoNS ............................................................................................................................... 6

GENERAl INFoRMAtIoN.................................................................................................................................... 6

oPERAtIoN . .......................................................................................................................................................... 9

tRoUBlESHootING GUIDE ............................................................................................................................. 13

tESt PRocEDURE ............................................................................................................................................ 15

toUcH coNtRol PANEl ASSEMBlY .............................................................................................................. 5

coMPoNENt REPlAcEMENt AND ADJUStMENt PRocEDURE................................................................. 9

PIctoRIAl DIAGRAM ......................................................................................................................................... 37

PoWER UNIt cIRcUIt ....................................................................................................................................... 38

lSI UNIt cIRcUIt ............................................................................................................................................... 39

PRINtED WIRING BoARD . ................................................................................................................................. 40

PARtS lISt ........................................................................................................................................................ 41

PAcKING AND AccESSoRIES .......................................................................................................................... 45

this document has been published to be used for after sales service only. the contents are subject to

change without notice.

Publication # 5995505350

ELECTROLUX

SERVICE MANUAL

ELECTROLUX HOME PRODUCTS, INC.

P. O. Box 212378, Augusta, GA, 30917

800•944•9044

OVER THE RANGE

MICROWAVE OVEN

MODEL

FMV156EMC

S05M256FM56EM

Page

P/N 316439253

Table of Contents

Summary of Contents for Electrolux FMV156EMC

Page 1: Table Of Contents
13 tESt PRocEDURE ............................15 toUcH coNtRol PANEl ASSEMBlY ......................5 coMPoNENt REPlAcEMENt AND ADJUStMENt PRocEDURE..............9 PIctoRIAl DIAGRAM ............................37 PoWER UNIt cIRcUIt ............................38 lSI UNIt cIRcUIt ............................... 39 PRINtED WIRING BoARD ..........................40 PARtS lISt ................................ 41 PAcKING AND AccESSoRIES .......................... 45 this document has been published to be used for after sales service only. the contents are subject to change without notice. ELECTROLUX HOME PRODUCTS, INC. P. O. Box 212378, Augusta, GA, 30917 800•944•9044 Publication # 5995505350 P/N 316439253...
Page 2: Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy
(e) 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 microwave 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 and ) contact ElEctRolUx HoME PRoDUctS, INc. and Food and Drug Administration's center for Devices and Radiological Health immediately.
Page 3: Warning To Service Personnel
FMV156EMC WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of pro- ducing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock. (Example) High Voltage capacitor, High Voltage Power transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. Read the Service Manual carefully and follow all instructions. Don't Touch ! Danger High Voltage Before Servicing When the testing is completed, 1. Disconnect the power supply cord, and then remove...
Page 4: Microwave Measurement Procedure
FMV156EMC MICROWAVE MEASUREMENT PROCEDURE A. Requirements: 1) Microwave leakage limit (Power density limit): the power density of microwave radiation emitted by a microwave oven should not exceed 1mW/cm at any point 5cm 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/cm at any point 5cm 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 relay and door sensing switch shall prevent microwave radiation emission in excess of 5 mW/cm at any point 5cm or more from the external surface of the oven. 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.
Page 5: Foreword And Warning
FMV156DQE / FMV156DCF FOREWORD OPERATION this Manual has been prepared to provide Electrolux Home Prod- ucts Service Personnel with operation and Service Information for the TROUBLESHOOTING GUIDE AND ElEctRolUx oVER tHE RANGE MIcRoWAVE oVENS, FM- TEST PROCEDURE V156DBE, FMV156DSE, FMV156DQE, FMV156DcF. It is recommended that service personnel carefully study the entire text of this manual so that they will be qualified to render satisfactory TOUCH CONTROL PANEL customer service. check the interlock switches and the door seal carefully. Special...
Page 6: Product Specifications
FMV156EMC PRODUCT SPECIFICATION ITEM DESCRIPTION Power Requirements 10 Volts / 14.1 Amperes 60 Hertz Single phase, 3 wire grounded Power output 950 watts (IEc tESt PRocEDURE) operating frequency of 450MHz case Dimensions Width 9-15/16" Height 15- 9/16" Depth 16-1/4" cooking cavity Dimensions Width 17-11/16" Height 14-15/16" 1.5 cubic Feet Depth 9-7/8" Hood lamp bulbs, 0W x , Incandescent light bulbs Hood fan Approx. 300 c.F.M. (High mode) control complement touch control System clock ( 1:00 - 1:59 ) 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 .
Page 7 FMV156EMC 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 10 Volt Ac, 60 Hz, 15 Amp. or more dedicated line, using a grounded receptacle. the receptacle should be located inside the cabinet directly above the Microwave oven/Hood system mounting location. 3-Pronged Plug Grounded Receptacle Box Grounding Pin 3-Pronged Receptacle OVEN DIAGRAM 1. oven door with see-through window. . Door hinges. 3. Waveguide cover. 4. turntable motor shaft. 10. l ight cover. 5. oven lamp. 11. G rease filters. It will light when oven is operating or door is 1. R emovable turntable.
Page 8 FMV156EMC CONTROL PANEL NotE: Some one-touch cooking features such as "Plus 1 Min" are disabled after three minutes when the oven is not used. these features are automatically enabled when the door is opened and closed or clear-off button is pressed.
Page 9: Operation
FMV156EMC OPERATION DESCRIPTION OF OPERATING SEQUENCE of the primary interlock switch, and door sensing switch the following is a description of component functions dur- is mechanically associated with the door so that it will ing oven operation. function in the following sequence. OFF CONDITION (1) When the door opens from a closed position, the secondary interlock relay, door sensing switch, and closing the door activates the door sensing switch and secondary interlock switch. (In this condition, the monitor primary interlock switch open their contacts, and then the monitor switch contacts close.
Page 10 FMV156EMC VENTILATION METHODS HOT AIR EXHAUST 1. VERtIcAl VENtING 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 center top of the oven, into the customer's vent system. to Duct to Duct Hood Fan Motor Hood Intake Duct R Grease Filter . HoRIZoNtAl VENtING the air handing is the same as VERtIcAl VENtING except that the final air discharge is directed horizontally out from the top rear of the oven into the customer's vent system.
Page 11 FMV156EMC ScHEMAtIc NotE: coNDItIoN oF oVEN 1. DooR cloSED. . clocK APPEARS oN DISPlAY. MAG. TEMP. FUSE CAVITY THERMAL 120VAC CUTOUT 60Hz CONTROL UNIT N.O. COM. POWER TRANSFORMER DOOR SENSING SWITCH HOOD FAN THERMAL CUT OUT HUMIDITY (RY2) OVEN LAMP SENSOR RELAY SECONDARY INTERLOCK (RY1) HOOD RELAY...
Page 12 FMV156EMC DESCRIPTION AND FUNCTION OF COMPONENTS cAUtIoN: BEFoRE REPlAcING A BloWN MoNItoR DOOR OPEN MECHANISM FUSE tESt tHE DooR SENSING SWItcH, the door is opened by pulling the door handle, refer to the SEcoNDARY INtERlocK RElAY (RY), RE- Figure D-1. lAY (RY1), PRIMARY INtERlocK SWItcH AND MoNItoR SWItcH FoR PRoPER Latch heads oPERAtIoN. (REFER to cHAPtER "tESt Latch hook PRocEDURE"). NOTE: MONITOR FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY.
Page 13: Troubleshooting Guide
FMV156EMC TROUBLESHOOTING GUIDE Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is con- nected. 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. IMPORTANT: If the oven becomes inoperative because of a blown monitor fuse, check the monitor switch, relay (RY1) secondary interlock relay (RY), door sensing switch and primary interlock switch before replacing the moni- tor fuse. If the monitor fuse is replaced, the monitor switch must also be replaced. Use part FFS-BA016/KIt as an assembly. IMPORTANT: 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, 1. Disconnect the power supply cord, and then remove outer case. . open the door and block it open. 3. Discharge high voltage capacitor.
Page 14 FMV156EMC cK = check / RE = Replace...
Page 15: Test Procedure
FMV156EMC TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MAGNETRON ASSEMBLY TEST 1. Disconnect the power supply cord, and then remove outer case. . open the door and block it open. 3. Discharge high voltage capacitor. 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. 5. 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. 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. MICROWAVE OUTPUT POWER the following test procedure should be carried out with the microwave oven in a fully assembled condi- tion (outer case fitted). HIGH VoltAGES ARE PRESENt DURING tHE cooK cYclE, So ExtREME cAUtIoN SHoUlD BE oBSERVED. 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...
Page 16 FMV156EMC TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER (HIGH VoltAGES ARE PRESENt At tHE HIGH VoltAGE tERMINAl, So Do Not AttEMPt to MEASURE tHE FIlAMENt AND HIGH VoltAGE.) HIGH VOLTAGE RECTIFIER TEST 1. Disconnect the power supply cord, and then remove outer case. . open the door and block it open. 3. Discharge high voltage capacitor. 4. 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. 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. NOTE: Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6.3 volts.
Page 17 FMV156EMC TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER cAUtIoN: IF tHE tEMPERAtURE FUSE INDIcAtES AN oPEN cIRcUIt At RooM tEMPERAtURE, REPlAcE tEMPERAtURE FUSE. 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. cAUtIoN: IF t HE t EMPERAtURE FUSE INDIcAtES AN oPEN cIRcUIt At RooM t EMPERAtURE, REPlAcE tEMPERAtURE FUSE. PRIMARY INTERLOCK SWITCH TEST 1. Disconnect the power supply cord, and then remove outer case. . open the door and block it open. 3. Discharge high voltage capacitor. 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 secondary interlock switch.
Page 18 FMV156EMC TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER SEcoNDARY INtERlocK RElAY (RY) 1. Disconnect the power supply cord, and then remove outer case. . open the door and block it open. 3. Discharge high voltage capacitor. 4. Disconnect two () wire leads from the male tab terminals of the Secondary Interlock Relay. check the state of the relay contacts using a 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. 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 the wire lead to the monitor switch (coM) terminal and check the continuity of the monitor circuit. MONITOR SWITCH TEST 1. Disconnect the power supply cord, and then remove outer case. . open the door and block it open. 3. Discharge high voltage capacitor. 4. 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...
Page 19 FMV156EMC TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER HOOD THERMAL CUT-OUT TEST 1. Disconnect the power supply cord, and then remove outer case. . open the door and block it open. 3. Discharge high voltage capacitor. 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 140½F(60½c) or more. At that temperature, the contacts will close. the thermal cut-out opens automatically at approximately 113½F(45½c). 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. HOOD FAN MOTOR TEST 1. Disconnect the power supply cord, and then remove outer case. . open the door and block it open. 3. Discharge high voltage capacitor. 4. If the motor does not turn, touch the FAN button once and check voltage between pins "1" and ""...
Page 20 FMV156EMC TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 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, con- trol Unit and Key Unit, and also the control Unit is divided into two units, lSI Unit and Power Unit, and troubleshooting by unit replacement is described according to the symptoms indicated. Before testing, 1) Disconnect the power supply cord, and then remove outer case. Refer to procedure of " HooD ExHAUSt loUVER REMoVAl ", " REMoVAl oF oVEN FRoM WAll " and " oUtER cASE REMoVAl ". ) open the door and block it open. 3) to discharge high voltage capacitor, wait for 60 seconds. 4) Remove two () screws holding the hood intake duct R to the ovencavity top plate and the base plate R. And remove the hood intake duct R. 5) Disconnect the leads to the primary of the power transformer. 6) Ensure that these leads remain isolated from other components and oven chassis by using insulation tape.
Page 21 FMV156EMC TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER When testing is completed, 1) Disconnect the power supply cord. ) open the door and block it open. 3) to discharge high voltage capacitor, wait for 60 seconds. 4) Reconnect all leads removed from components during testing. 5) Re-install the hood intake duct R. 6) Re-install the outer case (cabinet). 7) Reconnect the power supply cord after the outer case is installed. 8) Run the oven and check all functions. KEY UNIT TEST 1. Disconnect the power supply cord. . open the door and block it open. 3. to discharge high voltage capacitor, wait for 60 seconds. 4. Remove the control panel assembly. 5. 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 connecter). Use the Key unit matrix indicated on the control panel schematic and place a...
Page 22 FMV156EMC TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 7. After that procedure, re-connect the power supply cord. 8. check voltage between normal open terminal of the relay RY and the normal open terminal of the relay RY1 on the control unit with an A.c. voltmeter. the meter should indicate 10 volts, if not check oven circuit. RY1, RY, RY4, and RY5 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 Defective relay. Dc. voltage not indicated check diode which is connected to the relay coil. If diode is good, control unit is defective. RElAY SYMBol oPERAtIoNAl VoltAGE coNNEctED coMPoNENtS RY1 Approx. 6.6V D.c. oven lamp / Fan motor / turntable motor RY(cooK) Approx. 6.0V D.c. Power transformer RY4 Approx. 6.6V D.c. Hood motor RY5 Approx. 6.6V D.c. Hood lamp 9. Disconnect the power supply cord. 10. open the door and block it open. 11. to discharge high voltage capacitor, wait for 60 seconds. 1. Reconnect all leads removed from components during testing.
Page 23 FMV156EMC TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER StEPS occURRENcE cAUSE oR coRREctIoN only pattern at "a" is broken. *Insert jumper wire J1 and solder. Pattern at "a" and "b" are broken. *Insert the coil RcIlF003YAZZ between "c" and "d". 6) Make a visual inspection of the varistor. check for burned damage and examine the transformer with a tester for the presence of layer short-circuit (check (J1) the primary coil resistance which is approximately 15 Ω ± 10%). If any abnormal condition is detected, replace the defective parts.
Page 24 FMV156EMC TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER NOISE FILTER TEST 1. Disconnect the power supply cord, and then remove outer case. . open the door and block it open. 3. Discharge high voltage capacitor. 4. Disconnect the leads to the primary of the power transformer. 5. Using an ohm-meter, check between the terminals as described in the following table: NOISE FILTER UNIT MONITOR FUSE RESISTOR LINE CROSS CAPACITOR NOISE SUPPRESSION COIL LINE BYPASS CAPACITOR LINE BYPASS CAPACITOR 0.0033uF/ 250v 0.0033uF/ 250v...
Page 25: Touch Control Panel Assembly
FMV156EMC TOUCH CONTROL PANEL ASSEMBLY oUtlINE oF toUcH coNtRol PANEl the touch control section consists of the following units Symbol Voltage Application as shown in the touch control panel circuit. -5.3V lSI(Ic1) (1) Key Unit 3) Synchronizing Signal Circuit () control Unit (the control unit consists of lSI Unit and the power source synchronizing signal is available in Power U nit) order to compose a basic standard time in the clock cir- the principal functions of these units and the signals com- cuit. It incorporates a very small error because it works municated among them are explained below. on commercial frequency. Key Unit 4) Reset Circuit the key unit is composed of a matrix, signals generated A circuit to generate a signals which resetting the lSI to in the lSI are sent to the key unit through P0, P1, P, the initial state when power is applied.
Page 26 FMV156EMC Pin No. Signal Description AN3 oUt Back light circuit (light emitting diodes) driving signal. AN To input signal which communicates the door open/close information to LSI. Door close "H" level signal (0V). Door open "l" level signal (-5V). 9-10 AN1-AN0 oUt terminal not used. 11-13 P57-P55 oUt terminal not used. 0.1 sec. cNtR0 oUt Signal to sound buzzer (2.0 kHz). H : GND A: key touch sound.
Page 27 FMV156EMC Pin No. Signal Description P6 oUt Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G7 line keys on key matrix is touched. P5 oUt Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G6 line keys on key matrix is touched. P4 oUt terminal not used. P3 oUt terminal not used. P oUt Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G3 line keys on key matrix is touched. Key strobe signal. P1 oUt Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G line keys on key matrix is touched. Key strobe signal.
Page 28 FMV156EMC SERVICING 1. Precautions for Handling Electronic Components transformer. this unit uses cMoS lSI in the integral part of the circuits. 4) Re-install the outer case (cabinet). When handling these parts, the following precautions 5) Re-connect the power supply cord after the outer should be strictly followed. cMoS lSI have extremely case is installed. high impedance at its input and output terminals. For 6) Run the oven and check all functions.
Page 29: Component Replacement And Adjustment Procedure
FMV156EMC COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE WARNING AGAINST HIGH VOLTAGE: Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in severe, possibly fatal, electric shock. (Example) High Voltage capacitor, Power transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before operat- ing the oven.
Page 30 FMV156EMC 5. Pull the hood exhaust louver from the oven cavity by Push pushing the right and left tabs of the hood exhaust louver to remove. Hood exhaust louver 6. Now, the hood exhaust louver is free. Tab (left ) Push Tab (right) REMOVAL OF OVEN FROM WALL (Two persons recommended to remove the oven) 1. Disconnect the power supply cord, and uncoil the power supply cord.
Page 31 FMV156EMC the oven cavity top plate and release the snap band from 6. Now, the hood fan motor is free. the hood duct. 5. Remove the hood fan motor from the oven cavity top plate by lifting it up. MAGNETRON REMOVAL 1. Disconnect the power supply cord , remove the oven the oven cavity top plate. And remove the hood duct R from wall and remove outer case (Refer to procedure from the oven cavity top plate R. of "Removal of oven from Wall" and "outer case 8. Remove the magnetron duct from the oven cavity, by Removal".)
Page 32 FMV156EMC COOLING FAN MOTOR REMOVAL 1. Disconnect the power supply cord, remove the oven 15. R emove the fan blade from the shaft of the fan motor by from wall and remove outer case (Refer to procedure pulling and rotating the fan blade with your hand. of "Removal of oven from Wall" and "outer case 16. Now, the fan blade will be free. Removal".) CAUTION: . open the door and block it open. * Do not reuse the removed fan blade because the 3. to discharge the high voltage capacitor, wait for 60...
Page 33 FMV156EMC TURNTABLE MOTOR AND FOOD LAMP SOCKETS REMOVAL 1. Disconnect the power supply cord. tURNtABlE MotoR . open the door and block it open. 9. Disconnect the wire leads from the turntable motor. 3. to discharge the high voltage capacitor, wait for 60 10. Remove one (1) screw holding turntable motor to seconds. the oven cavity. 4. Remove the one (1) screw holding the base cover to the 11. Now the turntable motor is free. oven cavity back plate. HooD lAMP SocKEt 5. Remove the three (3) screws holding the base cover to 9. Screw the hood lamp off from the lamp socket. the oven cavity front face plate. 10. D isconnect the wire leads from the lamp socket by pushing 6. open the base cover.
Page 34 FMV156EMC fixing plate. 3. When attaching the key unit to the key fixing plate, adjust 14. R elease the two () tabs holding the power unit to the the upper edge and right edge of the key unit to the correct key fixing plate. position of key fixing plate. See key unit location. 15. R elease the three (3) tabs holding the lcD to the lcD 4. Stick the key unit firmly to the key fixing plate by rubbing holder. with soft cloth not to scratch. 16. R elease the two () tabs holding the lSI unit to the lcD holder. 17. R emove the lcD holder and the lED sheet. 18. N ow, the control unit is free. 19. R emove the one (1) screw holding the key fixing plate to the control panel. 0. R elease the six (6) tabs holding the key fixing plate to the control panel. 1. R emove the key fixing plate from the control panel. . R emove the key unit from the key fixing plate.
Page 35 FMV156EMC After adjustment, check the following. Latch heads 1. In and out play of door remains less than 0.5mm when Latch hook in the latched position. First check upper position of latch hook, pushing and pulling upper portion of door toward the oven face. t hen check lower portion of the latch hook, Door sensing switch pushing and pulling lower portion of the door toward the Door oven face. Both results (play in the door) should be less than 0.5mm. Monitor switch . the door sensing switch and primary interlock switch interrupt the circuit before the door can be opened. 3. Monitor switch contacts close when door is opened. 4. Re-install outer case and check for microwave leakage Primary interlock switch around door with an approved microwave survey meter.
Page 36 FMV156EMC DOOR DISASSEMBLY DOOR FRAME ASSEMBLY 1. Disconnect the power supply cord. . open the door and block it open. 11. R emove two () screws holding the door panel to the 3. to discharge the high voltage capacitor, wait for 60 door frame assembly. seconds. 1. R elease the door panel from the door frame assembly. 4. Remove the three (3) screws holding the hood exhaust NotE: It is easier to release the engaging parts of the upper louver to the oven cavity front face plate. or lower door hinge pin side at first. 5. Remove the hood exhaust louver from the oven cavity 13. N ow, door frame assembly is free. by pushing the right and left tabs of the hood exhaust LATCH SPRING, LATCH HEAD AND DOOR PANEL louver. (Refer to the procedure of "HooD ExHAUSt...
Page 37: Pictorial Diagram
FMV156EMC NOISE FILTER BOARD...
Page 38: Power Unit Circuit
FMV156EMC Figure S-2. Power Unit Circuit...
Page 39: Lsi Unit Circuit
FMV156EMC...
Page 40: Printed Wiring Board
FMV156EMC Figure S-4. Printed Wiring Board...
Page 41: Parts List
FMV156EMC PARTS LIST Note: The parts marked “∆” may cause undue microwave exposure. The parts marked “*” are used in voltage more than 250V. REF. NO. PART NO. DESCRIPTION Q'TY ELECTRIC PARTS FC-QZB050MRK0A High voltage assembly See note 1 High voltage capacitor...
Page 42 FMV156EMC REF. NO. PART NO. DESCRIPTION Q'TY XCPS740P08000 Screw XCPS740P10000 Screw MISCELLANEOUS CFZK-B816MRK0 Installation material assembly LBSHC0037WRE0 Grommet LX-BZ0195WRE0 Toggle screw XBPS750P85000 Screw : 5mm x 85mm XOTS740P12000 Screw : 4mm x 12mm XTSS750P35000 Screw : 5mm x 35mm XWHS750-16300...
Page 43 FMV156EMC OVEN AND CABINET PARTS...
Page 44 FMV156EMC CONTROL PANEL PARTS DOOR PARTS MISCELLANEOUS...
Page 45: Packing And Accessories
FMV156EMC PACKING AND ACCESSORIES 31 TURNTABLE TRAY INSTALLATION INSTRUCTIONS TOP PAD GREASE FILTER (x 2) 70 TOP/WALL TEMPLATE DOOR PROTECTOR OPERATION MANUAL INSTALL MATERIAL ASSEMBLY WRAP COVER EXHAUST DAMPER ASSEMBLY ACCESSORY PACK DOOR PAD BOTTOM PAD Non-replaceable items PACKING CASE...
Page 46 FMV156EMC NOTES...
Page 47 FMV156EMC NOTES...
Page 48 FMV156EMC coPYRIGHt © 007 BY ElEctRolUx HoME PRoDUctS, INc. All RIGHtS RESERVED. No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

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Electrolux FMV156EMC Service Manual

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