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Electrolux E30SO75FPSA 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 specified should
be used.
WARNING TO SERVICE PERSONNEL: Microwave ovens contain circuitry capable of producing very high voltage and
current, contact with following parts may result in a severe, possibly fatal, electrical shock. (High Voltage Capacitor,
High Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..)
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........................................................................................................................................................... 8
TROUBLESHOOTING GUIDE ............................................................................................................................. 5
TEST PROCEDURE ............................................................................................................................................ 7
TOUCH CONTROL PANEL .................................................................................................................................. 28
PRECAUTIONS FOR USING LEAD-FREE SOLDER.......................................................................................... 32
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE................................................................. 33
PICTORIAL DIAGRAM ......................................................................................................................................... 4
POWER UNIT CIRCUIT ....................................................................................................................................... 42
CPU UNIT CIRCUIT............................................................................................................................................. 43
PARTS LIST ......................................................................................................................................................... 44
PACKING AND ACCESSORIES .......................................................................................................................... 49
This document has been published to be used for after sales service only. The contents are subject to
change without notice.
Publication # 5995505392
ELECTROLUX
SERVICE MANUAL

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ElEctrolux HoME ProDuctS, INc.
P. O. Box 212378, Augusta, GA, 30917
HIGH SPEED CONVECTION
MICROWAVE OVEN
E30SO75FPSA
800•944•9044

S60M268E75FPS
MODEL
Page
P/N 316439257
E30SO75FPSA

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Summary of Contents for Electrolux E30SO75FPSA

  • Page 1: Table Of Contents

    PACKING AND ACCESSORIES .......................... 49 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 # 5995505392...

  • Page 2: Precautions To Be Observed Before And During Service 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 ) tell the user not to operate the oven and 2) contact ELECTROLUX HOME PRODUCTS, INC.

  • Page 3: Warning To Service Personnel

    E30SO75FPSA 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..

  • Page 4: Microwave Measurement Procedure

    E30SO75FPSA 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...

  • Page 5: General Information

    ELECTROLUX PRODUCT DESCRIPTION MICROWAVE OVEN E30SO75FPSA GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Electrolux Home Prod- OPERATION ucts Service Personnel with Operation and Service Information for the ELEC- TROLUX HIGH SPEED MICROWAVE OVEN, E30SO75FPSA. TROUBLESHOOTING GUIDE It is recommended that service personnel carefully study the entire...
  • Page 6 E30SO75FPSA SPECIFICATION ITEM DESCRIPTION Power Requirements 240 Volts 7.9 Amperes (Microwave) / 4.2 Amperes (Convection)/ 2.8 Amperes (Speed Cooking) 60 Hertz / Single phase, 3 wire grounded Power Output 000 watts (IEC Test Procedure) Operating frequency of 2450MHz Top Heater Power Output...
  • Page 7 E30SO75FPSA Electrical Requirements Receptacle Box Cover 3 Pronged Plug The electrical requirements are a 240 volt 60 Hz, AC only, 5 amp. protected electrical (6-15P) supply. It is recommended that a separate circuit serving only this appliance be provided. 3 Pronged Receptacle The 240 volt circuit is absolutely necessary for optimum cooking performance.
  • Page 8 E30SO75FPSA OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions dur- switch, door sensing switch, relay (RY), the primary ing oven operation. interlock relay (RY2) and the secondary interlock switch are activated with the following results. The circuits to...
  • Page 9 E30SO75FPSA SPEED BAKE COOKING . The coil of shut-off relays (RY, RY3 and RY5) are energized, the oven lamp, cooling fan motor, turntable Touch the BAKE pad and then enter cooking time. When the motor and convection motor are turned on.

  • Page 10: Schematic Diagram

    E30SO75FPSA (REHEAT, POPCORN, COOK, DEFROST) base and it is energized for three (3) seconds and off Microwave options of Automatic cooking will automatically for 29 seconds. Two (2) seconds after the thermistor compute the microwave power, cooking time or defrosting is energized, the voltage across the temperature time.
  • Page 11 E30SO75FPSA SCHEMATIC NOTE: CONDITION OF OVEN . DOOR CLOSED. NOTE: " " indicates components with potential above 250V. 2. COOKING TIME PROGRAMMED. 3. “START” PAD TOUCHED. LV TRANSFORMER TEMP. FUSE SIDE HEATER THERMAL CUT-OUT TOP HEATER THERMAL F10A CUT-OUT SOLID-STATE RELAY FUSE12.5A...
  • Page 12 E30SO75FPSA SCHEMATIC NOTE: CONDITION OF OVEN . DOOR CLOSED. 2. GRILL PAD TOUCHED. 3. C O O K I N G T I M E NOTE: " " indicates components with potential above 250V. PROGRAMMED. 4. “START” PAD TOUCHED. LV TRANSFORMER TEMP.
  • Page 13 E30SO75FPSA DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM The door is opened by pulling the door handle down and 3. If the door is opened, and the primary interlock relay forward, referring to the figure D-. When the door handle is and secondary interlock switch contacts fail to open, the pulled down, the latch heads are moved upward.
  • Page 14 E30SO75FPSA ο ο will open at 302 F (50 C) causing the oven to shut down. selected temperature. When the convection time reaches 0, When the thermal cut-out has cooled, the thermal cut-out the heating elements are de-energized and the convection ο...
  • Page 15 E30SO75FPSA operation is selected by the control unit. position). -4. The signal from damper switch is re-sensed in the Microwave Cooking: control unit and shut-off relay (RY4) is turned off. Damper is in the open position, because a portion of cool- -5.
  • Page 16 E30SO75FPSA (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)
  • Page 17 E30SO75FPSA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MAGNETRON ASSEMBLY TEST . Disconnect the power supply cord. 2. Remove the outer case cabinet, referring to “OUTER CASE CABINET REMOVAL”. 3. Open the oven door and block it open. 4. Discharge the high voltage capacitor.
  • Page 18 E30SO75FPSA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER overheating of the power transformer. Check for restricted air flow to the power transformer, especially the fan motor (power transformer side). 8. Reconnect all leads removed from components during testing. 9. Reinstall the outer case (cabinet) and the back plate.
  • Page 19 E30SO75FPSA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER PRIMARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH . Disconnect the power supply cord, and then remove outer case. 2. 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.
  • Page 20 E30SO75FPSA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER RELAY, SECONDARY INTERLOCK SWITCH, DOOR SENSING SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. 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.
  • Page 21 E30SO75FPSA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER CAUTION: IF THE THERMAL CUT-OUT INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE THERMAL CUT-OUT. THERMAL CUT-OUT (SIDE HEATER) TEST . Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open.
  • Page 22 E30SO75FPSA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 4. Discharge the high voltage capacitor. 5. Remove the back plate from the oven, referring to “BACK PLATE REMOVAL”. 6. Disconnect connector-E from the control unit. Measure the resistance of the thermistor with an ohmmeter.
  • Page 23 E30SO75FPSA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER CONVECTION MOTOR CAPACITOR 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 input leads and check for short or open between the terminals using an ohmmeter.
  • Page 24 E30SO75FPSA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER In this service manual, troubleshooting by unit replacement is described according to the symptoms indi- cated. Before testing, ) Disconnect the power supply cord, and then remove outer case. 2) Open the door and block it open.
  • Page 25 E30SO75FPSA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER RELAY 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.
  • Page 26 E30SO75FPSA TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER arrows. And touch the number pad 5. And then touch the start pad. (3) The oven is in Defrost cooking condition. (4) The oven will operate as follows. WEIGHT ST STAGE 2ND STAGE...
  • Page 27 E30SO75FPSA 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.
  • Page 28 E30SO75FPSA TOUCH CONTROL PANEL DIAGRAM The touch control section consists of the following units as shown in the touch control panel circuit. () Backlight LED function (2) LED function. (3) KEY function...
  • Page 29 E30SO75FPSA...
  • Page 30 E30SO75FPSA...
  • Page 31 E30SO75FPSA TOUCH CONTROL PANEL SERVICING 1. Precautions for Handling Electronic Components 5) Re-connect the power supply cord after the outer case This unit uses CMOS LSI in the integral part of the circuits. is installed. When handling these parts, the following precautions should 6) Run the oven and check all functions.

  • Page 32: Precautions For Using Lead-Free Solder

    E30SO75FPSA PRECAUTIONS FOR USING LEAD-FREE SOLDER 1. Employing lead-free solder “Main PWB” of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.

  • Page 33: Component Replacement And Adjustment Procedure

    E30SO75FPSA 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..
  • Page 34 E30SO75FPSA CAUTION . DISCONNECT THE OVEN FROM THE POWER SUPPLY BEFORE REMOVING THE OUTER CASE CABINET. 2. DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. Special screw NOTE Screw Driver When replacing the outer case cabinet, the two (2)

  • Page 35: Magnetron Removal

    E30SO75FPSA mounting angle to the bottom plate from under the bottom 0. Remove the four (4) screws holding the power transformer plate. to the transformer mounting angle. 9. Remove the two (2) screws holding the transformer . Now, the power transformer is free.
  • Page 36 E30SO75FPSA SOLID-STATE RELAY (MAGNETRON SIDE) REMOVAL . Disconnect the power supply cord. magnetron separator. 2. Remove the outer case cabinet, referring to “OUTER 8. Remove the three (3) screws holding the magnetron CASE CABINET REMOVAL”. separator to the bottom plate and the thermal cover 3.
  • Page 37 E30SO75FPSA mounting angle to the bottom plate from under the bottom cavity. plate. 32. Now, the convection duct assembly is free. 30. Remove the thirteen (3) screws holding the convection 33. Remove the nine (9) screws holding the heater duct duct to the oven cavity and the heater duct upper.

  • Page 38: Door Replacement And Adjustment

    E30SO75FPSA 3. Open the oven door and block it open. 3. Reconnect the wire leads to the switch. 4. Discharge the high voltage capacitor. 4. Make sure that the monitor switch is operating properly 5. Disconnect the wire leads from the switch.

  • Page 39: Door Disassembly

    E30SO75FPSA 5. Close the door. 2. The door is positioned with its face pressed toward oven 6. Remove the two (2) door springs from the door cam right, cavity front plate. oven hinge right, door com left and oven hinge left.

  • Page 40: Cpu Unit Circuit

    E30SO75FPSA CHOKE COVER handle levers. 22. Pull out the two (2) handle pins from the two (2) handle 8. Insert a putty knife (thickness of about 0.5 mm) into levers. the gap between the choke cover and the door panel 23.
  • Page 41 E30SO75FPSA...
  • Page 42 E30SO75FPSA Figure S-2. Power Unitl Circuit...
  • Page 43 E30SO75FPSA...

  • Page 44: Parts List

    E30SO75FPSA 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 ELECTRICAL PARTS QSW-MA085WRE0 Secondary interlock/door sensing/damper switch RMOTDA191WRE0 Damper motor...
  • Page 45 E30SO75FPSA REF. NO. PART NO. DESCRIPTION Q'TY PCUSGA603WREZ Cushion PFPF-A225WRPZ Thermal insulation L PSKR-A377WRFZ Rear separator PFPF-A227WRPZ Thermal insulation Upper PFPF-A228WRPZ Thermal insulation Bottom PGLSPA579WRZZ Lamp glass PPACGA189WREZ Silcon packing PREFHA069WRPZ Thermal cover Upper PREFHA078WRWZ Thermal cover Left PREFHA071WRPZ Thermal cover D...
  • Page 46 E30SO75FPSA REF. NO. PART NO. DESCRIPTION Q'TY TCAUHB008MRR0 User caution label PZET-A011WRE0 Thermal insulator LHLDWA029WRE0 Cord holder LHLDWA013WRE0 Purse lock LL ************* Shipping side angel L (Not replaceable part) ************* Shipping side angel R (Not replaceable part) FDUC-B080MRK0 Back duct...
  • Page 47 E30SO75FPSA...
  • Page 48 E30SO75FPSA CONTROL PANEL PARTS DOOR PARTS...

  • Page 49: Packing And Accessories

    E30SO75FPSA 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...
  • Page 50 E30SO75FPSA NOTES:...
  • Page 51 E30SO75FPSA NOTES:...

  • Page 52: Publication

    E30SO75FPSA ELECTROLUX COPYRIGHT © 2006 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...

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