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Electrolux ICON E30SO75ESS Technical & Service Manual

High speed convection microwave oven
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See also: Service Manual , Use and Care Manual
Technical Service Manual
High Speed Convection
Microwave Oven
Model
E30SO75ESS
Publication #5995505426
P/N 316439260
May 2009

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Summary of Contents for Electrolux ICON E30SO75ESS

  • Page 1 Technical Service Manual High Speed Convection Microwave Oven Model E30SO75ESS Publication #5995505426 P/N 316439260 May 2009...

  • Page 3: Safe Servicing Practices

    All non-insulated electrical terminals, connectors, heaters, etc. are adequately spaced away from all metal parts and panels. • All safety grounds (both internal and external) are correctly and securely connected. • All panels are properly and securely reassembled. © 2008 Electrolux Home Products, Inc.

  • Page 4: Table Of Contents

    Basic Information This Manual has been prepared to provide Electrolux Service Personnel with Operation and Service Information for an Electrolux ICON High Speed Convection Microwave Oven Model EW30SO75ESS. Table of Contents Section 1 Basic Information Section 3 Troubleshooting and Testing Safe Servicing Practices ..........
  • Page 5 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.

  • Page 6: Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy

    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.

  • Page 7: Before Servicing

    Basic Information 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. INVERTER UNIT, THAT INCLUDES HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE POWER TRANSFORMER, HIGH VOLTAGE RECTIFIER, HEAT SINK ETC., AND MAGNETRON, HIGH VOLTAGE HARNESS ETC..

  • Page 8: Microwave Measurement Procedure Usa

    Basic Information Microwave Measurement Procedure (USA) A. Requirements: 1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed 1 mW/cm 2 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/cm 2 at any point 5 cm or more from the external surface of the oven.

  • Page 9: Microwave Measurement Procedure Canada

    Basic Information Microwave Measurement Procedure (Canada) After adjustment of the door switches are completed individually or collectively, switch test and microwave leakage test 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.

  • Page 10: Product Specification

    Basic Information Product Specification Item Description Power Requirements (USA) 240 Volts 7.9 Amperes (Microwave) / 14.2 Amperes (Convection)/ 12.8 Amperes (Speed Cooking) 60 Hertz / Single phase, 3 wire grounded. Power Output 1000 watts (IEC 705 Test Procedure) Operating frequency of 2450MHz Top Heater Power Output 1500 Watts Side Heater Power Output...

  • Page 11: Grounding Instructions

    Basic Information Grounding Instructions Receptacle Box Cover This oven is equipped with a three prong grounding plug. 3 Pronged Plug It must be plugged into a wall receptacle that is properly (6-15P) installed and grounded in accordance with the National 3 Pronged Receptacle Electrical Code, local codes and ordinances.

  • Page 12: Oven Diagram

    Basic Information Oven Diagram 1. Door handle. To open the door, pull the handle down 8. Removable turntable. Place the turntable on the and forward. Never hold the door handle when turntable support securely. The turntable will rotate moving the oven. clockwise or counterclockwise.

  • Page 13: Section 2 Operation

    Operation 2. 240 volts AC is supplied to the primary winding of Operating Sequence Description the power transformer and is converted to about The following is a description of component functions 3.3 volts AC output on the filament winding, and during oven operation.

  • Page 14: Variable Cooking

    Operation B. The oven will continue to function for 30 minutes, Variable Cooking turning heater elements on and off as needed to When Variable Cooking Power is programmed, 240 volts maintain the selected preheat temperature. The AC is supplied to the power transformer intermittently oven will shut-down completely after 30 minutes.

  • Page 15: Speed Bake Cooking

    Operation SPEED BAKE COOKING SPEED ROAST COOKING Touch the BAKE pad and then enter cooking time. When Touch the ROAST pad and then enter cooking time. the start pad is touched, the following operations occur: When the start pad is touched, the following operations (See Figure 2-3) occur: (See Figure 2-5) 1.
  • Page 16 Operation SCHEMATIC NOTE: CONDITION OF OVEN NOTE: " " indicates components with potential above 250V. 1. DOOR CLOSED. 2. CLOCK APPEARS ON DISPLAY. Fuse LV T T ransformer Temp. Fuse Side Heater Thermal Cut-out Top Heater Fuse Thermal F10A Cut-out Solid-State Relay A A 1 1 Fuse 12.5A...
  • Page 17 Operation SCHEMATIC (CONVECTION) SCHEMATIC (SPEED REHEAT) SCHEMATIC (SPED BAKED) NOTE: CONDITION OF OVEN NOTE: CONDITION OF OVEN NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 1. DOOR CLOSED. 1. DOOR CLOSED. 2. CONVECTION PAD TOUCHED. 2. REHEAT PAD TOUCHED. 2. BAKED PAD TOUCHED. DESIRED TEMPERATURE SELECTED.

  • Page 18: Fire Sensing Feature

    Operation SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. ROAST PAD TOUCHED. NOTE: The solid-state relays and relay RY2 are energized alternately. 3. COOKING TIME PROGRAMMED. For last 15 minutes, the contacts of relay RY6 will contact D5. 4. “START” PAD TOUCHED. Fuse LV T T ransformer...

  • Page 19: Component Descriptions

    Operation MONITOR SWITCH Component Descriptions The monitor switch is mounted on the upper position of DOOR OPEN MECHANISM latch hook left. It is activated (the contacts opened) by The door is opened by pulling the door handle down and the left latch head while the door is closed. The switch forward, referring to Figure 2-6.

  • Page 20: Thermistor

    Operation THERMISTOR SIDE HEATER THERMAL CUT-OUT The thermistor is a negative temperature coefficient type. The thermal cut-out located on the thermal cover left is The temperature in the oven cavity is detected through designed to prevent damage to the side heating element the resistance of the thermistor, and then the control unit unit if an over heated condition develops in the top causes the heater relay to operate, thus the current to the...

  • Page 21: Fan Motor (Power Transformer Side)

    Operation FAN MOTOR (POWER TRANSFORMER SIDE) Top Heating The fan motor drives a blade which draws external cool Element Unit air. This cool air is directed through the air vents surrounding the power transformer and cools the power transformer. This air is channelled through the oven cavity to remove steam and vapors given off from the heating foods.

  • Page 22: Damper Open-Close Mechanism

    Operation DAMPER OPEN-CLOSE MECHANISM 3. When oven is convection cooking: A. Damper motor is energized by touching the Usually, the damper is in the open position except during CONVECTION, TEMPERATURE and START convection cooking, reheat, speed grill, speed roast, pads. speed bake, or all cooking modes which use top / side B.

  • Page 23: Section 3 Troubleshooting And Testing

    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.
  • Page 24 Troubleshooting and Testing (CONVECTION, SPEED BAKE/ CONDITION OFF CONDITION COOKING CONDITION (MICROWAVE) GRILL/ROAST) Possible Cause Defective Parts Magnetron Power Transformer H.V. Rectifier Assembly High Voltage Capacitor Secondary Interlock Switch Primary Interlock System Monitor Switch Monitor Fuse Magnetron Temperature Fuse Thermal Cut-out (Top) Top Heating Element Thermistor Damper Motor...

  • Page 25: Test Procedures

    Troubleshooting and Testing Test Procedures Procedure Component Test Letter MAGNETRON ASSEMBLY TEST 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. 2.
  • Page 26 Troubleshooting and Testing Procedure Component Test Letter POWER TRANSFORMER TEST 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.) 1.
  • Page 27 Troubleshooting and Testing Procedure Component Test Letter HIGH VOLTAGE CAPACITOR 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. (See Warnings and Instructions on page 3-1) 4.
  • Page 28 Troubleshooting and Testing Procedure Component Test Letter 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. (See Warnings and Instructions on page 3-1) 4.
  • Page 29 Troubleshooting and Testing Procedure Component Test Letter BLOWN MONITOR 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. (See Warnings and Instructions on page 3-1) 4.
  • Page 30 Troubleshooting and Testing Procedure Component Test Letter THERMAL CUT-OUT (TOP HEATER) 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. (See Warnings and Instructions on page 3-1) 4.
  • Page 31 Troubleshooting and Testing Procedure Component Test Letter TOP HEATING ELEMENT 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. (See Warnings and Instructions on page 3-1) 4.
  • Page 32 Troubleshooting and Testing Procedure Component Test Letter DAMPER MOTOR TEST 1. Disconnect power supply cord, and 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 back plate from the oven. 5.
  • Page 33 Troubleshooting and Testing Procedure Component Test Letter CONVECTION MOTOR CAPACITOR 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. (See Warnings and Instructions on page 3-1) 4.
  • Page 34 Troubleshooting and Testing Procedure Component Test Letter CHECKING TEMPERATURE IN THE CONVECTION MODE The following test procedure should be carried out with the microwave oven is a fully assembled condition (outer case fitted). It is difficult to measure the exact temperature in the convection oven. An accurate thermocouple type temperature tester must be used.
  • Page 35 Troubleshooting and Testing Procedure Component Test Letter 2. Control Unit The following symptoms indicate a defective control unit. 2-1. In connection with pads. a. When touching the pads, a certain group of pads do not produce a signal. b. When touching the pads, no pads produce a signal. 2-2.
  • Page 36 Troubleshooting and Testing Procedure Component Test Letter 8. Disconnect the power supply cord, and then remove outer case. 9. Open the door and block it open. 10. Discharge high voltage capacitor. 11. Reconnect all leads removed from components during testing. 12.
  • Page 37 Troubleshooting and Testing Procedure Component Test Letter PROCEDURES TO BE TAKEN WHEN THE FUSE 1 ON THE PRINTED WIRING BOARD (PWB) IS OPEN. To protect the electronic circuits, this model is provided with a fuse added to the primary on the PWB. 1.
  • Page 38 Troubleshooting and Testing Procedure Component Test Letter NOISE FILTER 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. (See Warnings and Instructions on page 3-1) 4.

  • Page 39: Section 4 Component Teardown

    Component Teardown TO PREVENT AN ELECTRIC SHOCK, TAKE THE FOLLOWING PRECAUTIONS: 1. BEFORE WIRING: 1) Disconnect the power supply. 2) Open the door and wedge the door open. 3) Discharge the high voltage capacitor and wait for 60 seconds. 2. DO NOT LET WIRE LEADS TOUCH TO THE FOLLOWING PARTS: 1) High voltage parts: Magnetron, High voltage transformer, High voltage capacitor and High voltage rectifier assembly.

  • Page 40: Outer Case Removal

    Component Teardown Outer Case Removal Terminal Insulator Removal 1. Open covers of the terminal insulator by using a small flat type screw driver. 2. Remove the receptacle from the terminal insulator. 1. Disconnect oven from power supply before 3. Now, the terminal insulator is free. removing outer case.

  • Page 41: Back Plate Removal

    Component Teardown Reinstall Power Transformer Removal 1. Reinstall the cord bushing to the power supply cord. 1. Disconnect power supply cord and remove outer 2. Insert the power supply cord with the cord bushing case. into the hole of the back plate. 2.

  • Page 42: Magnetron Removal

    Component Teardown Magnetron Removal High Voltage Capacitor And High Voltage Rectifier Assembly Removal 1. Disconnect power supply cord and remove outer case. 1. Disconnect the oven power supply cord and remove 2. Open the oven door and block it open. outer case.

  • Page 43: Fan Motor Removal

    Component Teardown Fan Motor Removal Solid-State Relay (Magnetron Side) Removal POWER TRANSFORMER SIDE 1. Disconnect the oven power supply cord and remove 1. Disconnect the oven power supply cord and remove outer case. outer case. 2. Open the oven door and block it open. 2.

  • Page 44: Damper Motor And Damper Switch Removal

    Component Teardown Damper Motor And Damper Switch Heater Duct Left Assembly, Heater Removal Duct Upper Assembly And Convection Duct Assembly Removal 1. Disconnect power supply cord and remove outer case. 1. Disconnect power supply cord and remove outer 2. Open the oven door and block it open. case.

  • Page 45: Side Heating Element Removal

    Component Teardown 18. Remove the two (2) screws securing the PWB Side Heating Element Removal mounting angle to the bottom plate. 1. Disconnect power supply cord and remove outer 19. Remove the PWB mounting angle with the power unit case. from the bottom plate.

  • Page 46: Door Sensing Switch, Secondary Interlock Switch And Monitor Switch Replacement/ Adjustment

    Component Teardown Door Sensing Switch, Secondary Latch Hook Left Latch Hook Right Interlock Switch and Monitor Switch Monitor Switch Replacement Stopper REMOVAL Pole 1. Disconnect the oven power supply cord and remove outer case. Pole Pole 2. Open the door and block it open. Stopper 3.

  • Page 47: Door Replacement And Adjustment

    Component Teardown 6. Secure the screws firmly. Door Replacement And Adjustment 7. Check all of the switches operation. If any switch has DOOR ASSEMBLY REMOVAL not activated with the door closed, loosen the screws and adjust the position of the latch hook right and the 1.
  • Page 48 Component Teardown Door Adjustment Door Cam Left When removing and/or loosening the oven hinges such Door Spring as in door replacement, the following adjustment criteria are taken. Door adjustment is performed with the door properly Door Cam Right Oven hinge installed and closed and while the oven hinges are loose.
  • Page 49 Component Teardown Door Disassembly 1. Disconnect the power supply cord and remove outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. 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.
  • Page 50 Component Teardown while keeping it connected to the oven. Servicing The Touch Control Panel b) On some models, the power supply cord between Precautions For Handling Electronic Components the touch control panel and the oven proper is long This unit uses CMOS LSI in the integral part of the enough that they may be separated from each other.
  • Page 51 Component Teardown Control Assembly And CPU Unit Tabs Screw Removal CONTROL PANEL ASSEMBLY Screw 1. Disconnect the oven power supply cord and remove Panel outer case. Sub Assembly Panel Angle 2. Open the oven door and block it open. 3. Discharge the high voltage capacitor. Locking tabs Bottom To discharge the high voltage capacitor, wait for 60...
  • Page 52 Component Teardown Notes 4-14...

  • Page 53: Wiring Schematic Oven Off Condition

    Wiring Diagrams Wiring Schematic Oven Off Condition 240V 60 H z SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CLOCK APPEARS ON DISPLAY. Damper Switch Door Sensing Switch Thermistor Jet Motor Damper Motor N.O. Com. Primary Fan Motor Interlock Relay COM.

  • Page 54: Backlit Led Diagram

    Wiring Diagrams Backlit LED Diagram...

  • Page 55: Function Led Diagram

    Wiring Diagrams Function LED Diagram...

  • Page 56: Pictorial Diagram

    Wiring Diagrams Pictorial Diagram...

  • Page 57: Power Unit Circuit

    Wiring Diagrams Power Unit Circuit...

  • Page 58: Cpu Unit Circuit

    Wiring Diagrams CPU Unit Circuit...

  • Page 59: Key Function

    Wiring Diagrams Key Function...
  • Page 60 Wiring Diagrams Notes...
  • Page 61 Parts List Note: The parts marked "Δ Δ Δ Δ Δ " may cause undue microwave exposure. The parts marked "*" are used in voltage more than 250V. DESCRIPTION REF. NO. Q’TY ELECTRICAL PARTS Secondary interlock/door sensing/damper switch Damper motor Top heating element Side heating element Thermistor...
  • Page 62 Parts List DESCRIPTION DESCRIPTION REF. NO. Q’TY REF. NO. Q’TY DOOR PARTS OVEN PARTS Door assy Thermal insulator back Door handle Thermal cover back Screw Divide plate A Choke cover Divide plate B Handle adapter left Oven cavity (Non replaceable part) Handle adapter right Turntable mounting angle Latch head Right...
  • Page 63 Parts List Control and Door Parts DESCRIPTION REF. NO. Q’TY SCREWS, NUTS, WASHERS AND OTHER Nut: 4mm x 3.2mm CONTROL PANEL PARTS Screw : 4 mm x 8 mm Screw : 4 mm x 6 mm Screw : 4 mm x 8 mm Screw : 4mm x 8 mm Screw : 4mm x 8 mm Screw : 4mm x 8 mm...
  • Page 64 Parts List Cabinet And Frame Parts...
  • Page 65 Parts List Packing and Accessories MISCELLANEOUS Actual wire harness may be different than illustration. 20-pin wire harness 128 Pursu lock L Main wire harness Main wire harness transformer Power unit 134 Pursu lock LL POSITION OF PURSE LOCK PACKING AND ACCESSORIES 118 LOW RACK TRAY HOLDER 117 HIGH RACK...
  • Page 66 Parts List Notes...

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