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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.
Publication # 5995526885
OVER THE RANGE MICROWAVE OVEN
SERVICE MANUAL
Models
GLBM188HB
GLBM188HS
PLBMV188HC
! ATTENTION !
October 2008
Part # 316439268
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Table of Contents
Troubleshooting
Related Manuals for Frigidaire GLBM188HB
Summary of Contents for Frigidaire GLBM188HB
- Page 1 OVER THE RANGE MICROWAVE OVEN SERVICE MANUAL GLBM188HB Models GLBM188HS PLBMV188HC ! ATTENTION ! 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.
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Page 2: Table Of Contents
CONTENTS SERVICING PRECAUTIONS ........3 CHAPTER 9. -
Page 3: Servicing Precautions
GLBM188HB Service Manual GLBM188HB PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY (a) Do not operate or allow the oven to be operated with the door open. -
Page 4: Warning To Service Personnel
GLBM188HB Service Manual CHAPTER 1. WARNING TO SERVICE PERSONNEL GLBM188HB 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. (Example) High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. -
Page 5: Microwave Measurement Procedure
GLBM188HB Service Manual CHAPTER 2. MICROWAVE MEASUREMENT PROCEDURE GLBM188HB [1] Requirements: 1. Microwave leakage limit (Power density limit): Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed 1mW/ at any point 5cm or more from the external surface of the oven, measured prior to acquisition by a purchaser, and thereafter (through the use- ful life of the oven), 5 mW/cm at any point 5cm or more from the external surface of the oven. -
Page 6: Chapter 3. Foreword And Warning
This Manual has been prepared to provide Electrolux Home Products Service Personnel with Operation and Service Information for the ELEC- TROLUX OVER THE RANGE MICROWAVE OVENS, PLBMV188HC, GLBM188HS and GLBM188HB. It is recommended that service personnel carefully study the entire text of this manual so that they will be qualified to render satisfactory customer service. -
Page 7: Chapter 4. Product Description
GLBM188HB Service Manual CHAPTER 4. PRODUCT DESCRIPTION GLBM188HB [1] SPECIFICATIONS ITEM DESCRIPTION 120 Volts / 14.3 Amperes Power Requirements 60 Hertz Single phase, 3 wire grounded 1000 W nominal of RF microwave energy (IEC Test procedure) Power Output Operating frequency of 2450 MHz Width 29 15/16"... -
Page 8: Chapter 5. General Information
GLBM188HB Service Manual CHAPTER 5. GLBM188HB GENERAL INFORMATION [1] 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 accor- dance with the National Electrical Code and local codes and ordinances. -
Page 9: Control Panel
[3] CONTROL PANEL Page 9 5 – 2... -
Page 10: Chapter 6. Operation
GLBM188HB Service Manual CHAPTER 6. OPERATION GLBM188HB [1] DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. 1. OFF CONDITION 3. POWER LEVEL P-0 to P-90 COOKING Closing the door activates the door sensing switch and secondary When Variable Cooking Power is programmed, the 120 volts A.C. -
Page 11: Sensor Cooking Condition
GLBM188HB 2. HORIZONTAL VENTING The air handing is the same as VERTICAL VENTING except that HUMIDITY SENSOR the final air discharge is directed horizontally out from the top rear of the oven into the customer's vent system. AIR FLOW HOOD FANMOTOR... -
Page 12: Oven Schematic
GLBM188HB [2] OVEN SCHEMATIC SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY 120V AC NOTE: " " indicates components with potentials above 250V 60Hz MAGNETRON TEMP.FUSE OVEN THERMAL 150ºC CUT OUT 145ºC COM. POWER UNIT N.O. -
Page 13: Description And Function Of Components
GLBM188HB [3] DESCRIPTION AND FUNCTION OF COMPONENTS 1. DOOR OPEN MECHANISM 4. THERMAL CUT-OUT (CAVITY) The door is opened by pulling the door handle, refer to the Figure D-1. This thermal cut-out is located on the top of the oven cavity. It is... -
Page 14: Troubleshooting Guide
GLBM188HB Service Manual CHAPTER 7. GLBM188HB TROUBLESHOOTING GUIDE Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected. 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. -
Page 15: Troubleshooting Chart
GLBM188HB [1] TROUBLESHOOTING CHART Home fuse blows when power cord is plugged into wall receptacle. Monitor fuse blows when power cord is plugged into wall receptacle. Display does not illuminate when power cord is first plugged into wall receptacle. Display... -
Page 16: Test Procedures
GLBM188HB Service Manual CHAPTER 8. TEST PROCEDURES GLBM188HB [1] A: MAGNETRON ASSEMBLY 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. 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 1 ohm. -
Page 17: High Voltage Capacitor Test
GLBM188HB 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: Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6.3 volts. -
Page 18: Primary Interlock System Test
GLBM188HB 8. Run the oven and check all functions. [7] G: PRIMARY INTERLOCK SYSTEM TEST 1. DOOR SENSING SWITCH 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. -
Page 19: Hood Thermostat Test
GLBM188HB 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” part number FFS-BA042WRKZ, even if the monitor switch operates normally. The monitor fuse and monitor switch assembly is comprised of a 20 ampere fuse and switch. - Page 20 GLBM188HB 4) Disconnect the leads to the primary of the power transformer. 5) Ensure that these leads remain isolated from other components and oven chassis by using insulation tape. 6) After that procedure, re-connect the power supply cord. 1. Key Unit 1) Check Key unit connection before replacement.
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Page 21: Key Unit Test
GLBM188HB [13] KEY UNIT (FPC) TEST 1) Disconnect the power supply cord, and then disassemble as per “HOOD LOUVER REMOVAL”, “REMOVAL OF OVEN FROM WALL” and “OUTER CASE REMOVAL”. Auto Timer Auto START Veggies 2) Open the door and block it open. -
Page 22: Open Pwb Fuse Procedures
GLBM188HB 12.Reconnect all leads removed from components during testing. 13.Re-install the outer case (cabinet). 14.Reconnect the power supply cord after the outer case is installed. 15.Run the oven and check all functions. [15] O: PROCEDURES TO BE TAKEN WHEN THE FUSE ON THE PRINTED WIRING BOARD (PWB) IS OPEN. - Page 23 GLBM188HB 6) The Sensor works with food at normal storage temperature. For example, chicken pieces would be at refrigerator temperature and canned soup at room temperature. 7) Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The sensor will detect the vapor given of by the spray and turn off before food is properly cooked.
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Page 24: Noise Filter Test
GLBM188HB d) After approximately 3 seconds, the display shows “X X. X X “ which is the time for detecting moisture. If the above is not the case, the control unit is probably defective. If the above is proper, the humidity sensor is probably defective. -
Page 25: Touch Control Panel Assembly
GLBM188HB Service Manual CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY GLBM188HB [1] OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units. 5) Indicator Circuit (1) Key unit Indicator element is Fluorescent Display. Basically, a Fluorescent Display is triode having a cathode, a grid and an anode. Usually,... -
Page 26: Humidity Sensor Circuit
GLBM188HB [2] HUMIDITY SENSOR CIRCUIT 1. Structure of Humidity Sensor 3. Detector Circuit of Humidity Sensor Circuit The humidity sensor includes two thermistors as shown in the illustra- This detector circuit is used to detect the output voltage of the humidity tion. -
Page 27: Servicing For Touch Control Panel
GLBM188HB [3] SERVICING FOR TOUCH CONTROL PANEL 1. Precautions for Handling Electronic Components b) On some models, the power supply cord between the touch control panel and the oven proper is long enough that they This unit uses CMOS LSI in the integral part of the circuits. When han- may be separated from each other. -
Page 28: Precautions For Using Leadfree Solder
GLBM188HB Service Manual CHAPTER 10. PRECAUTIONS FOR USING LEAD-FREE SOLDER GLBM188HB Employing lead-free solder The “Main 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. -
Page 29: Component Replacement And Adjustment Procedure
GLBM188HB Service Manual CHAPTER 11. COMPONENT REPLACEMENT AND ADJUSTMENT PROCE- GLBM188HB DURE [1] WARNINGS 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. -
Page 30: Hood Louver Removal
GLBM188HB [4] HOOD LOUVER REMOVAL 1. Disconnect the power supply cord. 2. Open the oven door and block it open. Screw Outer case cabinet 3. Remove the one (1) screw holding the outer case cabinet to the Screw oven cavity front face plate (the position is front/ center on the outer case cabinet). -
Page 31: Magnetron Removal
GLBM188HB 12.Remove the one (1) screw holding the noise filter assembly to the 28.Now, the oven lamp socket is free. fan duct. NOTE: When the hood fan motor is reinstalled, hold the hood 13.Disconnect the connector CN-F and CN-D from the control unit. -
Page 32: Hood Fan Thermostat Removal
GLBM188HB [10] HOOD FAN THERMOSTAT (60ºC ON) REMOVAL 1. Disconnect the power supply cord, remove the oven from wall and remove outer case (Refer to procedure of “Removal of Oven from Wall” and “Outer Case Removal”. 2. Open the door and block it open. -
Page 33: Turntable Motor Removal
GLBM188HB [12] TURNTABLE MOTOR REMOVAL 1. Disconnect the power supply cord. 5. Remove the base cover from the oven cavity by pulling down and moving to the left slightly. 2. Open the door and block it open. 6. Disconnect the wire leads from the turntable motor. -
Page 34: Door Switch Removal
GLBM188HB [18] DOOR SENSING SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL 1. REMOVAL 8. Remove each switch from the latch hook by pushing the one (1) stopper tub holding each switch. 1. Disconnect the power supply cord and remove the oven from wall 9. -
Page 35: Door Disassembly
GLBM188HB 8. Lift up the door assembly to release the upper and lower door 3. Door is positioned with its face pressed toward cavity face plate. hinge pins from the upper and lower oven hinges. 4. Re-install outer case and check for microwave leakage around 9. -
Page 36: Cooktop Lamp Socket Removal
GLBM188HB 19.Disconnect the connector CN-G from the switch unit. 21.Now the display unit is free. 20.Remove the six (6) screws holding the display unit to the key fixing frame. [22] COOK TOP LAMP SOCKET REMOVAL 1. Disconnect the power supply cord. -
Page 37: Chapter 12. Circuit Diagrams
GLBM188HB Service Manual CHAPTER 12. CIRCUIT DIAGRAMS GLBM188HB [1] Pictorial Diagram HUMIDITY SENSOR CN-F DOOR SENSING SWITCH CN-D Control harness B MONITOR SWITCH GRY/WHT SECONDARY INTERLOCK SWITCH BLK/BLK CN-A MAGNETRON WHT/WHT GRY/GRY CN-B WHT/GRY H.V. CAPACITOR CN-C POWER TRANSFORMER 120V AC... -
Page 38: Power Unit Circuit
GLBM188HB [2] Power Unit Circuit CN-A B3P5-VH-B CN-B B2P3-VH-B 47u/ 16V CN-C B5P9-VH-B D1 - 4: 1N4002 x4 (0V) KRA117S DTA143ES (0V) KTA1046Y KIA79L05BP 680 1/2W (-5V) AC120V 60Hz (J1) 8 7 6 5 IC-2 CN-F B3B-EH SENSOR 3.32KD OL/FM/AM DTD143ES 0.1U/50V... -
Page 39: Keypad Unit And Display Circuit
GLBM188HB [3] Key Unit and Display Unit Circuit Figure S-3. Key Unit and Display Unit Circuit Page 39 12 – 3... -
Page 40: Printed Wiring Board (Pwb)
GLBM188HB [4] Printed Wiring Board CN-T CN-F JP18 JP17 JP19 JP20 JP24 JP25 JP27 E C B JP28 CN-A FUSE 2.5A VRS1 R100 CN-C Figure S-4. Printed Wiring Board 12 – 4 Page 40... - Page 41 GLBM188HB MEMO Page 41 12 – 5...
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Page 42: Parts List
GLBM188HB [1] OVEN PARTS 76-4 76-4 76-1 76-2 76-3 76-4 23-2 23-1 76-5 76-6 Page 42... - Page 43 Pri. Interlock and door sensing switches DHHS caution Monitor switch (D3V-1G-2C25)and fuse assembly (20A 250V) SCREWS, WIRE HOLDER Power supply cord Screw; 4mm x 8mm [PLBMV188HC] [GLBM188HB] Lamp socket Screw; 4mm x 8mm [GLBM188HS] Hood motor assembly Screw; 3mm x 8mm Fan motor Screw;...
- Page 44 [2] DOOR AND CONTROL PANEL PARTS FOR PLBMV188HC [2] DOOR AND CONTROL PANEL PARTS FOR PLBMV188HC CONTROL PANEL PARTS Power unit Panel sub assembly Key xing plate Screw; 3mm x 8mm Screw; 3mm x 8mm DOOR PARTS Door stopper Control unit cover Door sub assembly Door frame assembly Latch head...
- Page 45 [2] DOOR AND CONTROL P ANEL PARTS FOR PLBMV188HC Key sheet Screw : 3mm x 6mm Cushion MISCELLANEOUS Earth wire Main wire harness [3] DOOR AND CONTROL PANEL PARTS FOR GLBM188HB/S Page 45...
- Page 46 [3] DOOR AND CONTROL PANEL PARTS FOR GLBM188HB/S CONTROL PANEL PARTS Power unit Panel [GLBM188HS] Panel [GLBM188HB] Key xing plate Screw; 3mm x 8mm Screw; 3mm x 8mm DOOR PARTS Door stopper Control unit cover Door sub assembly [GLBM188HB] Door sub assembly [GLBM188HS]...
- Page 47 [4] PACKING AND ACCESSORIES TOP PAD DOOR PROTECTOR PROTECTION SHEET WRAP COVER TURNTABLE TRAY CABINET COVER TRAY PAD CUSHION DOOR PAD ACCESSORY ASSEMBLY RACK OPERATION MANUAL WALL TEMPLATE RACK PAD INSTALLATION INSTRUCTION TOP TEMPLATE GREASE FILTER(x2) DAMPER ASSEMBLY BOTTOM PAD ACCESSORY HOLDER EHP LABEL Non-replaceable items...