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Electrolux MC2660E (EU) Service Manual
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Electrolux MC2660E (EU) Service Manual

Microwave ovens
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 ELECTROLUX HOME PRODUCTS
Corso Lino Zanussi,30
I - 33080 PORCIA /PN (ITALY)
Tel +39 0434 394850
Fax +39 0434 394096
SOI
Edition: 05.2006
SOI 05.06 FV
MICROWAVE OVENS
Publication No.
599 36 78-44
EN/SERVICE/FV
SERVICE MANUAL
Microwave Oven
(Middle Solo)
MC2660E (EU)
MC2661E (EU)
MC2660E (CH)
MC2660E (UK)
ZM266ST (EU)
ZM266ST (UK)
QN4040
JMW2061 (A,D)
EM2612 (F)
599 36 78-44

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Summary of Contents for Electrolux MC2660E (EU)

  • Page 1 SERVICE MANUAL MICROWAVE OVENS Microwave Oven (Middle Solo)  ELECTROLUX HOME PRODUCTS Publication No. Corso Lino Zanussi,30 MC2660E (EU) I - 33080 PORCIA /PN (ITALY) 599 36 78-44 MC2661E (EU) MC2660E (CH) Tel +39 0434 394850 MC2660E (UK) Fax +39 0434 394096...
  • Page 2 SOI 05.06 FV 2/34 599 36 78-44...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS CAUTION, MICROWAVE RADIATION / GENERAL IMPORTANT INFORMATION .......4 SERVICING / GENERAL INFORMATION ..................4 PRODUCT SPECIFICATIONS......................5 APPEARANCE VIEW........................6 OPERATING SEQUENCE ......................12 FUNCTION OF IMPORTANT COMPONENTS................14 TROUBLESHOOTING CHART......................15 TEST PROCEDURE ........................16 CONTROL PANEL ASSEMBLY.....................23 SERVICING............................24 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ..........25 MICROWAVE MEASUREMENT....................31 TEST DATA A GLANCE / WIRING / RE-WIRING .................32 SCHEMATIC DIAGRAMS ......................33...

  • Page 4: Caution, Microwave Radiation / General Important Information

    CAUTION CAUTION MICROWAVE RADIATION Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating devices if it is improperly used or connected. All input and output microwave connections, waveguides, flanges and gaskets must be secured. Never operate the device without a microwave energy absorbing load attached.

  • Page 5: Product Specifications

    PRODUCT SPECIFICATIONS SPECIFICATION ITEM DESCRIPTION Power Requirements 230 Volts(EU)/230-240 Volts(UK) 50 Hertz Single phase, 3 wire earthed Power Consumption 1.3 kW Power Output 900W watts nominal of RF microwave energy (measured by way of IEC 60705) Operating frequency of 2450 MHz Case Dimensions Width 592 mm Height 460 mm (including foot)

  • Page 6: Appearance View

    APPEARANCE VIEW OVEN 1 Front trim 2 Oven lamp 3 Control panel 4 Door open button 5 Waveguide cover 6 Oven cavity 7 Seal packing 8 Door seals and sealing surfaces. 9 Fixing points (4 points) 10 Ventilation openings 11 Outer cover 12 Rear cabinet 13 Power supply cord support clip.
  • Page 7 APPEARANCE VIEW CONTROL PANEL MC2660E / MC2661E 1 Digital Display 2 Indicators The appropriate indicator will flash or light up, just above each symbol according to the instruction. When an indicator is flashing, press the appropriate button (having the same symbol) or carry out the necessary operation.
  • Page 8 APPEARANCE VIEW CONTROL PANEL ZM266ST 1 Digital Display 2 Indicators The appropriate indicator will flash or light up, just above each symbol according to the instruction. When an indicator is flashing, press the appropriate button (having the same symbol) or carry out the necessary operation. Stir Turn over Weight...
  • Page 9 APPEARANCE VIEW CONTROL PANEL QN4040 1 Digital Display 2 Indicators The appropriate indicator will flash or light up, just above each symbol according to the instruction. When an indicator is flashing, press the appropriate button (having the same symbol) or carry out the necessary operation. Stir Turn over Weight...
  • Page 10 APPEARANCE VIEW CONTROL PANEL JMW2061 1 Digital Display 2 Indicators The appropriate indicator will flash or light up, just above each symbol according to the instruction. When an indicator is flashing, press the appropriate button (having the same symbol) or carry out the necessary operation. Stir Turn over Weight...
  • Page 11 APPEARANCE VIEW CONTROL PANEL EM2612 1 Digital Display 2 Indicators The appropriate indicator will flash or light up, just above each symbol according to the instruction. When an indicator is flashing, press the appropriate button (having the same symbol) or carry out the necessary operation. Stir Turn over Weight...

  • Page 12: Operation Sequence

    OPERATION SEQUENCE OFF CONDITION Closing the door activates the door interlock switch (monitored latch switch). IMPORTANT When the oven door is closed, the monitor switch contacts COM - NC must be open. When the microwave oven is plugged in a wall outlet (230V (EU) / 230-240V (UK) 50Hz), the noise filter is energized.
  • Page 13 OPERATION SEQUENCE HIGH, MEDIUM HIGH, MEDIUM, MEDIUM LOW, LOW COOKING When the microwave oven is preset for variable cooking power, the line voltage is supplied to the power transformer intermittently within a 32-second time base through the vary contact. The following levels of microwave power are given.

  • Page 14: Function Of Important Components

    FUNCTION OF IMPORTANT COMPONENTS DOOR OPEN MECHANISM The door can be opened by pushing the door open button. MONITORED LATCH SWITCH (SW1) DOOR 1. When the oven door is closed, the contacts LATCH HOOK MONITOR (COM - NO) must be closed. SWITCH (SW2) 2.

  • Page 15: Troubleshooting Chart

    TROUBLESHOOTING CHART 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 fuse F1.

  • Page 16: Test Procedure

    TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST MAGNETRON TEST NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL WHILE THE OVEN IS IN OPERATION. CARRY OUT 3D CHECK Isolate the magnetron from high voltage circuit by removing all leads connected to the filament terminal.

  • Page 17: Test Procedures

    TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST NOTE: The operation time of the microwave oven is “t + 3” sec. 3 seconds are needed for magnetron filament heat-up time. Measuring method: 1. Measure the initial temperature of the water before the water is added to the vessel.

  • Page 18: Component Test

    TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST SWITCH TEST CARRY OUT 3D CHECKS. Isolate the switch to be tested and using an ohmmeter check between the terminals as described in the following table. Table: Terminal Connection of Switch Plunger Operation COM to NO COM to NC COM;...
  • Page 19 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST NOISE FILTER TEST CARRY OUT 3D CHECKS Disconnect the leads from the terminals of the noise filter. Using an ohmmeter, check between the terminals as described in the following table. MEASURING POINTS INDICATION OF OHMMETER Between N and L Open circuit Between terminal N and WHITE...
  • Page 20 TEST PROCEDURES 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 can not be performed with only a voltmeter and ohmmeter. In this service manual, the touch control panel assembly is in four units, Control unit, Switch Unit, LED Unit and Relay Unit.

  • Page 21: L Relay Test

    TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST MC2660E(EU/UK/CH) MC2661E(EU/UK) ZM266ST (EU/UK) QN4040 JMW2061 EM2612 USAGE Start/Quick Not Used Stop Power Level Not Used Auto Defrost Cook from Frozen Auto Cook 2 Auto Cook 1 RELAY TEST Remove the outer case and check voltage between Pin No 1and Pin No 3 of the 3 pin connector (A) on the control unit with an A.C.
  • Page 22 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD (PWB) IS OPEN To protect the electronic circuits, this model is provided with a fine foil pattern added to the input circuit on the PWB, this foil pattern acts as a fuse. If the foil pattern is open, follow the troubleshooting guide given below for repair.

  • Page 23: Control Panel Assembly

    CONTROL PANEL ASSEMBLY OUTLINE OF CONTROL PANEL The touch control section consists of the following units as shown in the touch control panel circuit. (1) Switch Unit (2) Control Unit (3) LED Unit (4) Relay Unit The principal functions of these units and the signals communicated among them are explained below. Switch Unit The switch unit is composed of a matrix, signals generated in the LSI are sent to the switch unit through P22, P23 and P24.

  • Page 24: Servicing

    SERVICING 1. Precautions for Handling Electronic 5) Re-connect the power supply cord after the Components outer case is installed. This unit uses CMOS LSI in the integral part of the 6) Run the oven and check all functions. circuits. When handling these parts, the following A.

  • Page 25: Component Replacement And Adjustment Procedure

    COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before operating the oven. 1. CARRY OUT 3D CHECKS. 2. Make sure that a definite "click" can be heard 2. Door hinges or latch hook is damaged. when the microwave oven door is unlatched.
  • Page 26 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE HIGH VOLTAGE COMPONENTS REMOVAL (HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY) 8. Remove the high voltage capacitor from the capacitor To remove the components, proceed as follows. holder. 1. CARRY OUT 3D CHECKS 9. Disconnect the high voltage wire B and the high voltage 2.
  • Page 27 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE FAN MOTOR REPLACEMENT REMOVAL CAUTION: CAUTION: Do not reuse the removed fan blade as the 1. CARRY OUT 3D CHECKS. fixing hole may be oversize. 2. Remove the one (1) screw holding the noise 13. Remove the two (2) screws holding the fan motor filter to the chassis support.

  • Page 28: Power Supply Cord Replacement

    COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE OVEN LAMP REMOVAL 1. CARRY OUT 3D CHECKS. 2. Disconnect the wire lead from the oven lamp 3. Lift up the oven lamp from the clips of the air intake duct. 4. Now, the oven lamp is free. Lock Bulb Socket...
  • Page 29 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE MONITORED LATCH SWITCH, MONITOR SWITCH AND STOP SWITCH REMOVAL 1. CARRY OUT 3D CHECKS. MONITOR SWITCH 2. Remove the control panel assembly referring to "CONTROL PANEL ASSEMBLY REMOVAL". 3. Disconnect the all leads from the MONITORRED switches.

  • Page 30: Door Disassembly

    COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE DOOR DISASSEMBLY REMOVAL Note: After any service to the door; 1. Disconnect the power supply cord. (A) Make sure that monitored latch switch, stop switch and 2. Open the door slightly and remove the built monitor switch are operating properly.

  • Page 31: Microwave Measurement

    COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE INNER SEALER FILM Door film Backing film Installation 1. Tear away the backing film. 3. Put the pasted side of the inner sealer film on the door panel. Figure C-6. Inner Sealer Film MICROWAVE MEASUREMENT After adjustment of door latch switches, monitor Recommended instruments are: switch and door are completed individually or...

  • Page 32: Test Data A Glance / Wiring / Re-Wiring

    TEST DATA AT A GLANCE Parts Symbol Value / Data Thermal cut-out (OVEN) TC01 125°C Oven lamp 240-250V 25W High voltage capacitor 1.02µF AC 2100V (EU) 0,97µF AC 2100V (UK) Magnetron Filament < 1 Ω ∞ Filament – chassis ohm. Ω...

  • Page 33: Schematic Diagrams

    SCHEMATIC DIAGRAMS Figure 0-1 Oven Schematic-OFF Condition, Door Closed. Figure 0-2 Oven Schematic-ON Condition, Door Closed. SOI 05.06 FV 33/34 599 36 78-44...

  • Page 34: Pictorial Diagram

    PICTORIAL DIAGRAMS Figure S-1 Pictorial Diagram . SOI 05.06 FV 34/34 599 36 78-44...

This manual is also suitable for:

Mc2660e (ch)Mc2661eMc2660e (uk)Zm266stZm266st (uk)Qn4040 ... Show all

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