Frigidaire CFMV152KW Servicing Manual
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Frigidaire CFMV152KW Servicing Manual

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All About
Servicing
OVER THE RANGE
MICROWAVE OVENS
With Standard And Electronic Controls
Electrolux Major Appliances; North America
250 Bobby Jones Expwy
Augusta, GA 30907
Publication #5995542437
™
Part # 316439277
June 2009
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Summary of Contents for Frigidaire CFMV152KW

  • Page 1 All About Servicing OVER THE RANGE MICROWAVE OVENS With Standard And Electronic Controls ™ Electrolux Major Appliances; North America 250 Bobby Jones Expwy Augusta, GA 30907 Publication #5995542437 Part # 316439277 June 2009...

  • Page 3: Section 1 Basic Information

    Section 1 Basic Information Safe Servicing Practices Avoid personal injury and/or property damage by observing important Safe Servicing Practices. Following are some limited examples of safe practices: 1. DO NOT attempt a product repair if you have any doubts as to your ability to complete the repair in a safe and satisfactory manner.

  • Page 4: Table Of Contents

    Section 1 Basic Information This Manual has been prepared to provide Electrolux Service Personnel with Operation and Service Information for Electrolux Microwave Ovens FMV152KB, FMV152KS, FMV152KM, FMV152KQ, FMV152KW, CFMV152KB, CFMV152KS, CFMV152KM and CFMV152KW. Table of Contents Section 1 Basic Information Section 3 Troubleshooting and Testing Safe Servicing Practices ........
  • Page 5 Section 1 Basic Information WARNING Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing. Service personnel - do not contact the following parts while the appliance is energized: Inverter unit, that includes high voltage capacitor, high voltage power transformer, high voltage rectifier, heat sink, etc., magnetron, high voltage harness etc.;...

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

    Section 1 Basic Information Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy 1. Do not operate or allow the oven to be operated with the door open. 2. Make the following safety checks on all ovens to be serviced before activating the magnetron or other micro wave source, and make repairs as necessary: (1) 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.

  • Page 7: Before Servicing

    Section 1 Basic Information WARNING Microwave ovens contain circuitry capable of producing very high voltage and current. contact with THE following parts may result in a severe, possibly fatal, Don't Touch! electrical shock. Danger High Voltage 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

    Section 1 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

    Section 1 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

    Section 1 Basic Information Product Specification Item Description Power Requirements (USA)120 Volts / 15 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 1000 watts (IEC 705 Test Procedure) Operating frequency of 2450MHz Case Dimensions (excluding handle) Width 29-7/8” Height 16-13/32”...

  • Page 11: Grounding Instructions

    Section 1 Basic 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, 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.

  • Page 12: Oven Diagram

    Section 1 Basic Information Oven Diagram 1. Oven door with see-through window. Ventilation openings. 2. Door hinges. 10. Light Cover. 3. Waveguide cover. 11. Grease filters. 4. Turntable motor shaft. 12. Removable turntable. The turntable will rotate clockwise or counterclockwise. Only remove for 5.

  • Page 13: Section 2 Operation

    Section 2 Operation Operating Sequence Description 6. When the door is opened during a cook cycle, monitor switch, door sensing switch, primary The following is a description of component functions interlock switch, and secondary interlock relay are during oven operation. activated with the following results.
  • Page 14 Section 2 Operation OG : Orange BR : Brown SCHEMATIC - Oven Lamp YW : Yellow WH : White NOTE: CONDITION OF OVEN - Fan Motor RD : Red BK : Black 1. DOOR CLOSED. BL : Blue GY : Grey - Turntable Motor GN : Green PK : Pink...

  • Page 15: Ventilation Methods Hot Air Exhaust

    Section 2 Operation VENTILATION METHODS HOT AIR EXHAUST POWER LEVEL P-0 TO P-90 COOKING When Variable Cooking Power is programmed, the 1. Vertical Venting 120 volts A.C. is supplied to the power transformer For this venting method, hot air rising from the intermittently through the contacts of relay (RY2) which conventional range below is drawn in by the hood fan is operated by the control unit within an interval second...

  • Page 16: Touch Control Panel Assembly Outline

    Section 2 Operation Touch Control Panel Assembly Outline 7. Relay Circuit To drive the magnetron, fan motor, turntable motor, The touch control section consists of the following units. hood motor, and light the oven lamp and hood lamp. (1) Key unit 8.

  • Page 17: Monitor Switch

    Section 2 Operation MONITOR SWITCH THERMAL CUT-OUT (HOOD ) The monitor switch is activated (the contacts opened) This thermal cut-out located on the right base plate. It by the latch head on the door while the door is closed. is designed to automatically turn on the hood fan motor The switch is intended to render the oven inoperative, by whenever the hot air rising from the conventional range means of blowing the monitor fuse when the contacts of...
  • Page 18 Section 2 Operation Notes...

  • Page 19: Section 3 Troubleshooting And Testing

    Section 3 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 20 Section 3 Troubleshooting and Testing Low Voltage No Power At Outlet Shorted In Powercord Open or Shorted Wiring Hood Motor Capacitor Hood Lamp or Socket Turntable Off Condition Turntable Motor Fan Motor Oven Lamp or Socket Foil Pattern on P.W.B. (RY-5) Relay (RY-4)

  • Page 21: Test Procedures

    Section 3 Troubleshooting and Testing Test Procedures Procedure Component Test Letter MAGNETRON ASSEMBLY TEST WARNING 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.
  • Page 22 Section 3 Troubleshooting and Testing Procedure Component Test Letter POWER TRANSFORMER TEST WARNING 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 fi lament and high voltage.) 1.
  • Page 23 Section 3 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 24 Section 3 Troubleshooting and Testing Procedure Component Test Letter PRIMARY INTERLOCK SWITCH 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 25 Section 3 Troubleshooting and Testing Procedure Component Test Letter MONITOR SWITCH 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 26 Section 3 Troubleshooting and Testing Procedure Component Test Letter HOOD FAN 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.
  • Page 27 Section 3 Troubleshooting and Testing 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.
  • Page 28 Section 3 Troubleshooting and Testing Procedure Component Test Letter CONTROL UNIT The following symptoms indicate a defective control unit. Before replacing the control unit, perform the Key unit test (Procedure M) to determine if control unit is faulty. 1. In connection with pads. a) When touching the pads, a certain group of pads do not produce a signal.
  • Page 29 Section 3 Troubleshooting and Testing Procedure Component Test Letter KEY UNIT (FPC) 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 Section 3 Troubleshooting and Testing Procedure Component Test Letter RELAY 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 Section 3 Troubleshooting and Testing Procedure Component Test Letter FOIL PATTERN ON THE PRINTED WIRING BOARD TEST To protect the electronic circuits, this model is provided with a fi ne foil pattern added to the primary on the PWB, this foil pattern acts as a fuse. Fuse check and repairs.

  • Page 32: Component Test

    Section 3 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 33 Section 3 Troubleshooting and Testing Pin# Signal Description VL2-VL1 Power source voltage input terminal. Standard voltage for LCD. Terminal to change cooking input according to the Model. AN7-AN4 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.
  • Page 34 Section 3 Troubleshooting and Testing Pin# Signal Description 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. 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.

  • Page 35: Section 4 Component Teardown

    Section 4 Component Teardown WARNING To prevent an electric shock, take the following precautions: 1. Before wiring: A. Disconnect the power supply. B. Open the door and wedge the door open. C. Discharge the high voltage capacitor and wait for 60 seconds. 2.

  • Page 36: Hood Exhaust Louver Removal

    Section 4 Component Teardown Removal Of Oven From Wall NOTE (Two persons recommended to remove the oven) The following adjustments or component replacement 1. Disconnect the power supply cord, and uncoil the can be performed without removing the oven from the power supply cord.

  • Page 37: Power Transformer Removal

    Section 4 Component Teardown Power Transformer Removal Hood Fan Motor Removal REMOVAL 1. Disconnect the power supply cord and remove the oven from wall and remove outer case. (Refer to 1. Disconnect the power supply cord, remove the oven procedure of “Removal of Oven from Wall” and from wall, and remove outer case.

  • Page 38: Magnetron Removal

    Section 4 Component Teardown Magnetron Removal High Voltage Rectifi er And High Voltage Capacitor Removal 1. Disconnect power supply cord, remove oven from wall and remove outer case (Refer to procedure 1. Disconnect power supply cord, remove oven from of “Removal of Oven from Wall” and “Outer Case wall and remove outer case (Refer to procedure Removal”.) of “Removal of Oven from Wall”...

  • Page 39: Hood Fan Thermal Cut-Out Removal

    Section 4 Component Teardown Hood Fan Thermal Cut-Out Removal Cooling Fan Motor Removal 1. Disconnect power supply cord, remove oven from Removal wall and remove outer case (Refer to procedure 1. Disconnect the power supply cord, remove the Hood of “Removal of Oven from Wall” and “Outer Case Exhaust louver from the cavity.

  • Page 40: Turntable Motor And Food Lamp Sockets

    Section 4 Component Teardown Turntable Motor And Food Lamp Sockets Servicing The Touch Control Panel Removal Precautions For Handling Electronic Components 1. Disconnect the power supply cord. This unit uses CMOS LSI in the integral part of the 2. Open the door and block it open. circuits.
  • Page 41 Section 4 Component Teardown 4. Disconnect the leads to the primary of the power B. Servicing the touch control panel with power transformer. supply from an external power source: 5. Ensure that these leads remain isolated from other Disconnect the touch control panel completely from the components and oven chassis by using insulation oven proper, and short both ends of the door sensing tape.

  • Page 42: Control Panel Assembly And Control Unit Removal

    Section 4 Component Teardown Control Panel Assembly And Control Unit NOTES FOR KEY UNIT REPLACEMENT Removal 1. Do not reuse torn key unit because the performance of the adhesive becomes weak. 1. Disconnect the power supply cord. 2. Before attaching a new key unit, wipe off remaining 2.

  • Page 43: Door Sensing Switch, Secondary Interlock Switch And Monitor Switch Removal

    Section 4 Component Teardown Door Sensing Switch, Secondary Interlock Door Sensing Switch, Secondary Interlock Switch And Monitor Switch Removal Switch, And Monitor Switch Adjustment 1. Disconnect the power supply cord and remove the Removal oven from wall and remove outer case. (Refer to 1.

  • Page 44: Door Replacement

    Section 4 Component Teardown After adjustment, check the following. Door Replacement 1. In and out play of door remains less than 0.5mm Removal when in the latched position. First check upper 1. Disconnect the power supply cord and remove the position of latch hook, pushing and pulling upper oven from wall and remove outer case.

  • Page 45: Door Disassembly

    Section 4 Component Teardown Door Disassembly NOTE Removal After any service to the door: 1. Disconnect the power supply cord and remove the 1. Make sure that door sensing switch and secondary oven from wall and remove outer case. (Refer to interlock switch are operating properly.
  • Page 46 Section 4 Component Teardown Latch Spring, Latch Head And Door Panel 14. Release the latch spring from the tab of the latch head and tab of the door panel. 15. Release the latch head from the door panel. 16. Now, the latch spring, latch head and door panel are free.

  • Page 47: Section 5 Wire Diagrams

    Section 5 Wiring Diagrams Wiring Schematic Oven OFF Condition SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CLOCK APPEARS ON DISPLAY. - Oven Lamp - Fan Motor - Turntable Motor - Stirrer Motor - Cooktop Lamp OG : Orange YW : Yellow RD : Red BL : Blue...

  • Page 48: Wiring Diagram

    Section 5 Wiring Diagrams Wiring Diagram YW-32 DOOR SENSING WH-31 SWITCH OG:ORANGE BR:BROWN YW:YELLOW WH:WHITE YW-32 BK-17 T/TABLE WH-31 RD:RED BK:BLACK WH-15 MOTOR GY:GREY BL:BLUE WH-15 PK:PINK BK-24 GN:GREEN YW-7 BL-25 WH-16 MOTOR GROUND GY-26 GN-23 OG-18 HARNESS LEAD S BL-20 PARTS LEADS OG-18...

  • Page 49: Section 6 Parts List

    Section 6 Parts List Control Panel And Door Parts A FMV152K (FMV152KBA) Model Index: B FMV152K (FMV152KMA) C FMV152K (FMV152KQA) D FMV152K (FMV152KSA) E FMV152K (FMV152KWA) POS. NO PART NO. DESCRIPTION A - - - - Control Assembly, black - B - - - Control Assembly, silver - - C - - Control Assembly, bisque...
  • Page 50 Section 6 Parts List A FMV152K (FMV152KBA) A FMV152K (FMV152KBA) Model Index: Model Index: B FMV152K (FMV152KMA) B FMV152K (FMV152KMA) C FMV152K (FMV152KQA) C FMV152K (FMV152KQA) D FMV152K (FMV152KSA) D FMV152K (FMV152KSA) E FMV152K (FMV152KWA) E FMV152K (FMV152KWA) POS. NO PART NO.
  • Page 51 Section 6 Parts List Oven And Cabinet Parts...

  • Page 52: Packing And Accessories

    Section 6 Parts List Packing And Accessories TURNTABLE TRAY TOP PAD INSTALLATION INSTRUCTIONS 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...

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