Electrolux EI30MH55GSA Service Manual

Over the range microwave oven

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Technical & service manual (70 pages)

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Page 1: Table Of Contents
PACKING AND ACCESSORIES .......................... 50 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 # 5995505434...
Page 2: Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy
EI30MH55GSA EI30MH55GBA EI30MH55GWA PRECAUTIONS TO BE OBSERVED BEFORE AND DUR- ING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY (a) Do not operate or allow the oven to be operated with the door open. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make repairs as necessary: () 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. (c) Before turning on microwave power for any service test or inspection within the microwave generating compart- ments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections. (d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is released to the owner. (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 Measure- ment Procedure outlined in this service manual.
Page 3: Warning To Service Personnel
EI30MH55GSA EI30MH55GBA EI30MH55GWA 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) 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 Don't Touch ! instructions. Danger High Voltage...
Page 4: Microwave Measurement Procedure
EI30MH55GSA EI30MH55GBA EI30MH55GWA SERVICING FOR INVERTER UNIT WARNING This inverter unit contains circuitry capable of producing high voltage and high current. Contact with any part of the high voltage will result in electrocution. DO NOT ACCESS ANY PARTS OF INVERTER UNIT WITH POWER SUPPLY CONNECTED. DO NOT OPERATE INVERTER UNIT ITSELF. It is dangerous because this unit contains high voltage components. MICROWAVE MEASUREMENT PROCEDURE A. Requirements: ) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed mW/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.
Page 5: Foreword And Warning
EI30MH55GBA EI30MH55GWA SERVICE MANUAL ELECTROLUX PRODUCT DESCRIPTION MICROWAVE OVENS EI30MH55GSA/EI30MH55GBA/EI30MH55GWA GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Electrolux Service OPERATION Personnel with Operation and Service Information for the ELEC- TROLUX MICROWAVE OVENS, EI30MH55GSA, EI30MH55GBA and EI30MH55GWA. TROUBLESHOOTING GUIDE AND It is recommended that service personnel carefully study the entire TEST PROCEDURE text of this manual so that they will be qualified to render satisfactory customer service.
Page 6: Product Specifications
EI30MH55GSA EI30MH55GBA EI30MH55GWA PRODUCT SPECIFICATION ITEM DESCRIPTION Power Requirements 20 Volts / 2 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 200 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHz Case Dimensions Width 29-5/6" Height 7" Depth 5- 9/6" Cooking Cavity Dimensions Width 22-9/6" Height 0-9/6" 2. Cubic Feet Depth 5" Hood lamp 2 bulbs, 20W x 2, Incandescent light bulbs Hood fan Approx. High - 300 C.F.M. / Low - 270 C.F.M. Control Complement Touch Control System Clock ( :00 - 2:59 ) Timer (0 - 99 min. 99 seconds) Microwave Power for Variable Cooking Repetition Rate; P-HI ..........Full power throughout the cooking time P-90 .
Page 7: General Information
EI30MH55GSA EI30MH55GBA EI30MH55GWA GENERAL INFORMATION 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 and 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. WARNING: Improper use of the grounding plug can result in a risk of electric shock. 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 20 Volt AC, 60 Hz, 5 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. Grounded 3-Pronged Plug Receptacle Box Grounding Pin 3-Pronged Receptacle OVEN DIAGRAM . Oven door with see-through window.
Page 8 EI30MH55GSA EI30MH55GBA EI30MH55GWA NOTE: Some one-touch cooking features such as "MINUTE PLUS" are disabled after three minutes when the oven is not in use. These features are automatically enabled when the door is opened and closed or the STOP/ CLEAR pad is pressed.
Page 9: Operation
EI30MH55GSA EI30MH55GBA EI30MH55GWA OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions dur- () When the door opens from a closed position, the ing oven operation. primary interlock switch and secondary interlock switch open their contacts, and then the monitor OFF CONDITION switch contacts close. And contacts of the relay (RY) Closing the door activates the stop switch, primary interlock remain closed. switch and secondary interlock switch. (In this condition, the (2) When the door is closed from the open position, the monitor switch contacts are opened.)
Page 10 EI30MH55GSA EI30MH55GBA EI30MH55GWA VENTILATION METHODS HOT AIR EXHAUST resistance reaches the value set according to the menu, supplementary cooking is started. T he time of supplementary . VERTICAL VENTING cooking is determined by experiment with each food category For this venting method, hot air rising from the conventional and input into the LSI. range below is drawn in by the hood fan motor through An example of how sensor works: (BAKED POTATOES) 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.
Page 11 EI30MH55GSA EI30MH55GBA EI30MH55GWA SCHEMATIC NOTE: CONDITION OF OVEN . DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY SECONDARY INTERLOCK SWITCH N.O. N.O. PRIMARY INTERLOCK SWITCH FUSE OVEN LAMP MOTOR WITH TEMP. FUSE STIRRER MOTOR STOP SWITCH HOOD FAN 120VAC 60Hz. THERMAL CUT OUT High OVEN LAMP RELAY HOOD...
Page 12: Description And Function Of Components
EI30MH55GSA EI30MH55GBA EI30MH55GWA DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM monitor switch contacts. CAUTION: BEFORE REPLACING A BLOWN MONITOR The door is opened by pushing the open button on the FUSE TEST THE STOP SWITCH, PRIMARY control panel, refer to the Figure D-. INTERLOCK SWITCH, SECONDARY INTER- When the open button is pushed, the open button pushes LOCK SWITCH AND MONITOR SWITCH FOR up the open lever, and then the open lever pushes up the PROPER OPERATION. (REFER T O CHAPTER latch head. T he latch heads are moved upward and released "TEST PROCEDURE").
Page 13: Troubleshooting Guide
EI30MH55GSA EI30MH55GBA EI30MH55GWA 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 (RY) primary interlock switch and secondary interlock switch before replacing the monitor fuse. If monitor fuse is replaced, the monitor switch must also be replaced. Use part FFS-BA06/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, . Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open.
Page 14 EI30MH55GSA CK = Check / RE = Replace EI30MH55GBA EI30MH55GWA NOISE FILTER LOW VOLTAGE CK NO POWER AT OUTLET RE SHORTED IN POWER CORD CK OPENED OR SHORTED WIRING CK HOOD MOTOR CAPACITOR RE HOOD LAMP OR SOCKET RE STIRRER MOTOR RE FAN MOTOR RE OVEN LAMP OR SOCKET HUMIDITY SENSOR (R2120J) FOIL PATTERN ON P.W.B.
Page 15: Test Procedure
EI30MH55GSA EI30MH55GBA EI30MH55GWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MAGNETRON ASSEMBLY TEST . 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. 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 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 condition (outer case fitted). HIGH VOLTAGES ARE PRESENT DURING THE COOK CYCLE, SO EXTREME CAUTION SHOULD BE OBSERVED.
Page 16 EI30MH55GSA EI30MH55GBA EI30MH55GWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER Chart for checking the defective inverter unit No power at full power output cooking Magnetron is defective. Exchange the magnetron. Exchange the Inverter unit Brown monitor fuse The secondary interlock switch, primary interlock Check the switches according to switch and the monitor switch are operating properly. the switch Test Procedure Exchange the Inverter unit OVEN THERMAL CUT-OUT TEST .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. 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(45 C).
Page 17 EI30MH55GSA EI30MH55GBA EI30MH55GWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 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 stop switch. 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: If the stop 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 RY. MONITOR SWITCH TEST . Disconnect the power supply cord, and then remove outer case.
Page 18 EI30MH55GSA EI30MH55GBA EI30MH55GWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER HOOD THERMAL CUT-OUT TEST . 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. 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 40 F(60 C) or more. At that temperature, the contacts will close. The thermal cut-out opens automatically at approximately 3 F(45 C).
Page 19 EI30MH55GSA EI30MH55GBA EI30MH55GWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER . Key Unit. NOTE ; ) Check key unit ribbon connection before replacement. 2) Re-install the hood intake duct R with seven (7) screws. 3) Re-install the outer case (cabinet). 4) Reconnect the power supply cord after the outer case is 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. ) 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. 4) Replace the key unit. 5) Reconnect all leads removed from components during testing.
Page 20: Test Procedures
EI30MH55GSA EI30MH55GBA TEST PROCEDURES EI30MH55GWA PROCEDURE COMPONENT TEST LETTER schematic and place a jumper wire between the pins that correspond to the STOP/CLEAR pad making momentary contact. If the control unit responds by clearing with a beep the key unit is faulty and must be replaced. If the control unit does not respond, it is faulty and must be replaced. If a specific pad does not respond, the above method may be used (after clearing the control unit) to determine if the control unit or key pad is at fault. 6. Reconnect all leads removed from components during testing. 7. Re-install the control panel assembly. 8. Reconnect the power supply cord. 9. Run the oven and check all functions. dinner cook defrost recipes START/ quick user melt breakfast pref add a minute power timer/ level clock keep...
Page 21 EI30MH55GSA EI30MH55GBA EI30MH55GWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER (6) Touch the “ START ” button. (7) The oven is in Easy defrost cooking condition. (8) The oven will operate as follows. Menu ST STAGE 2ND STAGE Steaks/Chops LEVEL TIME LEVEL TIME 0.5lbs 40% 57sec. 40% 22sec. (9) If improper operation is indicated, the control unit is probably defective and should be checked. FOIL PATTERN ON THE PRINTED WIRING BOARD TEST To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse. . Foil pattern check and repairs. ) Disconnect the power supply cord.
Page 22 EI30MH55GSA EI30MH55GBA EI30MH55GWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 9) Disconnect the power supply cord. 0) Open the door and block it open. ) To discharge high voltage capacitor, wait for 60 seconds. 2) Reconnect all leads removed from components during testing. 3) Re-install the hood intake duct R. 4) Re-install the outer case (cabinet). 5) Reconnect the power supply cord after the outer case is installed. 6) Run the oven and check all functions. HUMIDITY SENSOR TEST FOR R-220J Checking the initial sensor cooking condition WARNING : The oven should be fully assembled before following procedure. () The oven should be plugged in at least two minutes before sensor cooking. (2) Room temperature should not exceed 95 F (35 (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 INSTRUCTIONS” of the operation manual.
Page 23 EI30MH55GSA EI30MH55GBA EI30MH55GWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER (9) Reconnect the oven to the power supply and check the sensor cook operation as follows: 9-. Fill approximately 200 milliliters (7.2 oz) of tap water in a 000 milliliter measuring cup. 9-2. Place the container on the center of tray in the oven cavity. 9-3. Close the door. 9-4. Touch the TIMER/CLOCK pad once, the POWER LEVEL pad twice, the START pad once, the number pad once and the number pad 4 once. 9-5. The control panel is in automatic Sensor operation. 9-6. 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, and refer to explanation be- low. CHECKING CONTROL UNIT () Disconnect the power supply cord, and then remove outer case. Refer to procedure of “HOOD LOUVER...
Page 24 EI30MH55GSA EI30MH55GBA EI30MH55GWA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER NOISE FILTER TEST . 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 the leads to the primary of the power transformer. 5. Using an ohm-meter, check between the terminals as described in the following table: SOURCE NOISE FILTER UNIT SOURCE NOISE SUPPRESSION COIL LINE CROSS CAPACITOR 0.22uF/ AC 250V LINE BYPASS CAPACITOR LINE BYPASS CAPACITOR 0.0033uF/ AC...
Page 25: Touch Control Panel Assembly
EI30MH55GSA EI30MH55GBA EI30MH55GWA TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units 3) Synchronizing Signal Circuit as shown in the touch control panel circuit. The power source synchronizing signal is available in order to compose a basic standard time in the clock () Key Unit circuit. It incorporates a very small error because it works (2) Control Unit (The Control unit consists of LSI Unit and on commercial frequency. Power U nit) 4) Reset Circuit The principal functions of these units and the signals com- A circuit to generate a signals which resetting the LSI to municated among them are explained below. the initial state when power is applied. Key Unit 5) Buzzer Circuit...
Page 26: Description Of Lsi
EI30MH55GSA EI30MH55GBA DESCRIPTION OF LSI EI30MH55GWA The I/O signal of the LSI is detailed in the following table. Pin No. Signal Description -2 VL2-VL Power source voltage input terminal. Standard voltage for LCD. 3-5 AN7-AN5 Terminal to change cooking input according to the Model. By using the A/D converter contained in the LSI, DC voltage in accordance with the Model in operation is applied to set up its cooking constant. AN4 Temperature measurement input: MAGNETRON THERMISTOR. By inputting DC voltage corresponding to thetemperature detected by the thermistor, this input is converted into temperature by the A/D converter built into the SLI.
Page 27 EI30MH55GSA EI30MH55GBA EI30MH55GWA Pin No. Signal Description 25 P4 OUT Terminal not used. 26 P40 Connected to GND through the pull-down resistor. Auto clear terminal. 27 RESET Signal is input to reset the LSI to the initial state when power is applied. 28 P7 OUT Clock signal is output to a memory IC (IC3). 29 P70 OUT Data signal is output to a memory IC (IC3). Internal clock oscillation frequency input setting. 30 XIN The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to XOUT terminal. 3 XOUT OUT Internal clock oscillation frequency control output.
Page 28 EI30MH55GSA EI30MH55GBA EI30MH55GWA Pin No. Signal Description 47 SEG25 OUT Terminal not used. Segment data signal. 4 8-72 SEG24-SEG0 OUT Connected to LCD. The relation between signals are as follows: LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.) SEG 24 (48) - -----------------SEG24 (29) SEG (6) - ------------------ SEG (6) SEG 23 (49) - -----------------SEG23 (28) SEG 0 (62) - ------------------ SEG0 (5) SEG 22 (50) - -----------------SEG22 (27)
Page 29 EI30MH55GSA EI30MH55GBA EI30MH55GWA HUMIDITY SENSOR CIRCUIT As the sensor cooking proceeds, the food is heated to (1) Structure of Humidity Sensor generate moisture by which the resistance balance of The humidity sensor includes two thermistors as shown the bridge circuit is deviated to increase the voltage in the illustration. One thermistor is housed in the closed available at AN terminal of the LSI. vessel filled with dry air while another in the open vessel. Then the LSI observes that voltage at AN terminal Each sensor is provided with the protective cover made of and compares it with its initial value, and when the metal mesh to be protected from the external airflow.
Page 30 EI30MH55GSA EI30MH55GBA EI30MH55GWA SERVICING 1. Precautions for Handling Electronic Components repair all the controls (sensor-related ones included) of This unit uses CMOS LSI in the integral part of the circuits. the touch control panel while keeping it connected to When handling these parts, the following precautions the oven. should be strictly followed. CMOS LSI have extremely B. On some models, the power supply cord between the high impedance at its input and output terminals. For...
Page 31 EI30MH55GSA EI30MH55GBA EI30MH55GWA PRECAUTIONS FOR USING LEAD-FREE SOLDER 1. Employing lead-free solder The "Control unit PWB and Inverter unit PWB" of this model employs lead-free solder. This is indicated by the "LF" symbol printed on the PWB and in the service manual. The suffix letter indicates the alloy type of the solder. Example: Sn-Ag-Cu Indicates lead-free solder of tin, silver and copper. 2. Using lead-free wire solder When repairing a PWB with the "LF" symbol, only lead-free solder should be used. (Using normal tin/lead alloy solder may result in cold soldered joints and damage to printed patterns.) As the melting point of lead-free solder is approximately 40 C higher than tin/lead alloy solder, it is recommend that a dedicated bit is used, and that the iron temperature is adjusted accordingly. 3. Soldering As the melting point of lead-free solder (Sn-Ag-Cu) is higher and has poorer wettability, (flow), to prevent damage to the land of the PWB, extreme care should be taken not to leave the bit in contact with the PWB for an extended period of time. Remove the bit as soon as a good flow is achieved. The high content of tin in lead free solder will cause premature corrosion of the bit. To reduce wear on the bit, reduce the temperature or turn off the iron when it is not required. Leaving different types of solder on the bit will cause contamination of the different alloys, which will alter their characteristics, making good soldering more difficult. It will be necessary to clean and replace bits more often when...
Page 32: Component Replacement And Adjustment Procedure
EI30MH55GSA EI30MH55GBA EI30MH55GWA 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) Magnetron, Inverter Unit, High Voltage Harness etc.. WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before operat- ing the oven. . Disconnect the power supply cord. . Door does not close firmly. 2. Make sure that a definite” click” can be heard when 2. Door hinge, support or latch hook is damaged.
Page 33: Outer Case Removal
EI30MH55GSA EI30MH55GBA EI30MH55GWA 4. Remove the three (3) screws holding the hood louver to Left tab the oven cavity front face plate and the outer case screw at the top middle. Right tab 5. Pull the hood louver from the oven cavity by pushing the right and left tabs of the hood louver to remove. 6. Now, the hood louver is free. Screws Hood louver REMOVAL OF OVEN FROM WALL (Two persons recommended to remove the oven) cabinet) to the top cabinet. . Disconnect the power supply cord, and uncoil the power 5. While supporting the front of the oven, pull down the two supply cord. (2) mounting levers and release the oven from the unit 2. To discharge the high voltage capacitor, wait for 60 mounting plate.
Page 34: Pictorial Diagram
EI30MH55GSA EI30MH55GBA EI30MH55GWA HOOD FAN THERMAL CUT-OUT REMOVAL . Disconnect the power supply cord and remove the oven flange, the fan duct and base plate R. And remove the from wall and remove outer case. (Refer to procedure hood intake duct R. of "Removal of Oven from Wall" and "Outer case 5. Disconnect the wire leads from the hood fan thermal Removal") cut-out. 2. Open the door and block it open. 6. Remove one () screw holding the thermal cut-out to the 3. To discharge the high voltage capacitor, wait for 60 flange of base plate R.
Page 35 EI30MH55GSA EI30MH55GBA EI30MH55GWA metal pieces may be produced. METHOD FOR INSTALLING FAN BALDE * Do not touch the pliers to the coil of the fan motor . Hold the center of the bracket which supports the shaft because the coil may be cut or damaged. of the fan motor on the flat table. * Do not disfigure the bracket by touching with the 2. Install the fan blade to the shaft of fan motor by pushing...
Page 36 EI30MH55GSA EI30MH55GBA EI30MH55GWA HOOD LAMP SOCKETS REMOVAL . Disconnect the power supply cord. 7. Screw the hood lamp off from the lamp socket. 2. Open the door and block it open. 3. To discharge the high voltage capacitor, wait for 60 8. Disconnect the wire leads from the lamp socket. seconds. 9. Push the tab holding the lamp socket to the hood lamp mount. 4. Remove the five (5) screws holding the bottom sush to the base cover. 0. R emove the lamp socket from the hood lamp mount. . Now, the lamp socket is free. 5. Remove the three (3) screws holding the base cover to the oven cavity front face plate. 6. Open the base cover.
Page 37: Noise Filter Removal
HUMIDITY SENSOR REMOVAL EI30MH55GSA EI30MH55GBA . Disconnect the power supply cord, remove the oven EI30MH55GWA from wall, and remove outer case. (Refer to procedure of the humidity sensor should be positioned through of "REMOVAL OF OVEN FROM WALL" AND "OUTER the hole of the oven cavity top plate (right). CASE REMOVAL".) And proceed as follows. 2. Open the door and block it open. Sensor ground wire Humidity sensor 3. To discharge the high voltage capacitor, wait for 60 Screws seconds. Hole 4. Remove seven (7) screws holding the hood intake duct R Screw Wire lead of humidity sensor to the oven cavity top plate, the oven cavity front flange, fan duct, base plate R, and magnetron duct. And remove the hood intake duct R. Hole Hood duct L 5. Disconnect the connector CN-F of humidity sensor from the control unit.
Page 38 EI30MH55GSA EI30MH55GBA EI30MH55GWA STOP SWITCH, PRIMARY INTERLOCK SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL . Disconnect the power supply cord and remove the oven 8. Disconnect the wire leads of each switch. from wall and remove outer case. (Refer to procedure 9. Remove each switch from the latch hook by pushing the of "Removal of Oven from Wall" and "Outer case one () stopper tab holding each switch. Removal") 0. N ow, each switch is free. 2. Open the door and block it open. Re-install 3. To discharge the high voltage capacitor, wait for 60 . Re-install each switch in its place. T he secondary interlock...
Page 39: Door Replacement
EI30MH55GSA EI30MH55GBA EI30MH55GWA DOOR REPLACEMENT DOOR ASSEMBLY REMOVAL After any servicing, make sure of the following : . Disconnect the power supply cord. . Door latch heads smoothly catch latch hook through 2. Open the door and block it open. latch holes and that latch head goes through center of 3. To discharge the high voltage capacitor, wait for 60 latch hole.
Page 40 EI30MH55GSA EI30MH55GBA EI30MH55GWA 9. Pry the choke cover by inserting a putty knife in order shown in Figure C-3. Door stopper 0. N ow choke cover is free from door panel and door frame. NOTE: When carrying out any repair to the door, do Choke cover not bend or warp the slit choke (tabs on the door panel assembly) to prevent microwave leakage.
Page 41 EI30MH55GSA EI30MH55GBA EI30MH55GWA...
Page 42: Power Unit Circuit
EI30MH55GSA EI30MH55GBA EI30MH55GWA Figure S-2b. Power Unit Circuit...
Page 43: Lsi Unit Circuit
EI30MH55GSA EI30MH55GBA EI30MH55GWA...
Page 44: Printed Wiring Board
EI30MH55GSA EI30MH55GBA EI30MH55GWA Figure S-4. Printed Wiring Board...
Page 45: Parts List
GCABUB131MRP0 Outer case cabinet [EI30MH55GSA] [EI30MH55GBA] GCABUB132MRP0 Outer case cabinet [EI30MH55GWA] TMAPCB089MRR0 Schematic diagram FANGKB025MRY0 Hood lamp glass assembly [EI30MH55GSA] [EI30MH55GBA] FANGKB026MRY0 Hood lamp glass assembly [EI30MH55GWA] PCOVPB137MRT0A Base cover [EI30MH55GSA] [EI30MH55GBA] PCOVPB138MRT0 Base cover [EI30MH55GWA] CONTROL PANEL PARTS CPWBFB121MRU0...
Page 46 Right rear rack holder PDUC-B135MRF0 Center duct LANGTB066MRP0A Oven lamp angle PFILWB005MRP0 Lamp filter LANGQB073MRP0A Unit angle DOOR PARTS CDORFB474MRK0 Door assembly [EI30MH55GSA] CDORFB475MRK0 Door assembly [EI30MH55GBA] CDORFB476MRK0 Door assembly [EI30MH55GWA] PSHEPB143MRE0 Sealer film LSTPPB023MRF0 Latch head MSPRTA046WRE0 Latch spring...
Page 47 EI30MH55GSA EI30MH55GBA EI30MH55GWA OVEN PARTS...
Page 48 EI30MH55GSA EI30MH55GBA EI30MH55GWA CABINET PARTS...
Page 49: Door Parts
EI30MH55GSA EI30MH55GBA EI30MH55GWA DOOR PARTS CONTROL PANEL PARTS MISCELLANEOUS Attached to Red & Blue wires @ Inverter unit Attached to HV wire @ Mag Terminals...
Page 50: Packing And Accessories
EI30MH55GSA EI30MH55GBA EI30MH55GWA PACKING AND ACCESSORIES SCALE PLATE (x 2) GREASE FILTER (x 2) Rack TOP PAD TOP AND WALL TEMPLATE OPERATION MANUAL INSTALL MATERIAL ASSEMBLY DOOR PROTECTOR INSTALATION INSTRUCTIONS WRAP COVER EXHAUST DAMPER ASSEMBLY ACCESSORY PACK DOOR PAD BOTTOM PAD...
Page 51 EI30MH55GSA EI30MH55GBA EI30MH55GWA NOTES:...
Page 52: Publication
EI30MH55GSA EI30MH55GBA EI30MH55GWA ELECTROLUX COPYRIGHT © 2007 BY ELECTROLUX. 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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