Page 2 - Links
Howstuffworks "How Microwave Cooking Works" moisture. So the outside can be crispy and brown (e.g. - bread forms a crust) while the inside is moist. In microwave cooking, the radio waves penetrate the food and excite water and fat molecules pretty much evenly throughout the food. There is no...
Page 3 - How Does A Microwave Oven Work?; Basic Theory of Operation; How A Microwave Oven Works; microwave energy; Search
Howstuffworks The website below is governed by its own terms and conditions; its owner has no affiliation with HowStuffWorks.com. How Does A Microwave Oven Work? Basic Theory of Operation Excerpts from the book The Complete Microwave Oven Service Handbook --NOW available on CD-ROM ( CLICK HERE) and ...
Page 4 - The; Figure 1; interlock switches
Howstuffworks The control section consists of a timer (electronic or electromechanical), a system to control or govern the power output, and various interlock and protection devices. The components in the high-voltage section serve to step up the house voltage to high voltage. The high voltage is th...
Page 5 - Figure 2; high-voltage section; Figure 3
Howstuffworks Generally, the control system includes either an electromechanical relay or an electronic switch called a triac as shown in Figure 2 . Sensing that all systems are "go," the control circuit generates a signal that causes the relay or triac to activate, thereby producing a volta...
Page 6 - waveguide; Learn more about the myths & mysteries of microwave ovens; Copyright Information; noncommercial educational
Howstuffworks The microwave energy is transmitted into a metal channel called a waveguide , which feeds the energy into the cooking area where it encounters the slowly revolving metal blades of the stirrer blade . Some models use a type of rotating antenna while others rotate the food through the wa...
Page 7 - Send correspondence to:
Howstuffworks Send correspondence to: Microtech, P.O. Box 940, Gonzalez, Florida 32560 Disclaimer: The author assumes no liability for any incidental, consequential or other liability from the use of this information. All risks and damages, incidental or otherwise, arising from the use or misuse of ...
Page 8 - How Do Microwaves Cook?; CLICK HERE; and from the video; Microwaves possess three basic characteristics:; cavity resonator
How Do Microwave Ovens Cook Food? How Do Microwaves Cook? Excerpts from the book The Complete Microwave Oven Service Handbook --NOW available on CD-ROM ( CLICK HERE ) and from the video You Can Fix Your Microwave Oven, Plus VCR Know-How Copyright ©, 1996-99 by J. Carlton Gallawa Music of Claude Debu...
Page 9 - Friction Produces the Heat That Cooks the Food; friction
How Do Microwave Ovens Cook Food? Friction Produces the Heat That Cooks the Food To illustrate this third characteristic, notice the cooked turkey to the right. The waves of microwave energy are cycling above and below a horizontal baseline. The half cycle below the baseline possesses negative prope...
Page 10 - noncommercial
How Do Microwave Ovens Cook Food? Learn more about the myths & mysteries of microwave ovens | Back | Send Email | Top of Page | Home Page | Microwave Oven Video Repair Course | Free FiX Finder Repair Database | FAQ | Links | Copyright Information Unless otherwise noted, all materials at this cit...
Page 11 - What Are Microwaves?; Microwaves
Microwave Energy--What it is and what it is not What Are Microwaves? Excerpts from the book The Complete Microwave Oven Service Handbook --NOW available on CD-ROM ( CLICK HERE ) Copyright ©, 1989-2000 by J. Carlton Gallawa and from the video You Can Fix Your Microwave Oven, Plus VCR Know-How Debussy...
Page 12 - Is Microwave Radiation the Same as
Microwave Energy--What it is and what it is not Electromagnetic radiation begins with a phenomenon that occurs when electric current flows through a conductor, such as a copper wire. The motion of the electrons through the wire produces a field of energy that surrounds the wire and floats just off i...
Page 13 - The material available through this site
Microwave Energy--What it is and what it is not ionizing, and in sufficient intensity will simply cause the molecules in matter to vibrate, thereby causing friction, which produces the heat that cooks the food. Copyright Information Unless otherwise noted, all materials at this cite (including witho...
Page 14 - The Purpose and Function of Interlock Switches; . All Rights Reserved Worldwide
The Interlock Switches Used In Microwave Ovens The Purpose and Function of Interlock Switches Used In Microwave Ovens © 1996-2002 J. Carlton Gallawa . All Rights Reserved Worldwide To ensure safe operation, all microwave ovens are equipped with safety interlock switches . The door-interlock system i...
Page 15 - operating; Important Safety Information; safety precautions; How To Test Interlock Switches; Unplug the oven; and remove the outer cover.; DISCHARGE ALL HIGH VOLTAGE CAPACITORS.
The Interlock Switches Used In Microwave Ovens All switches have a voltage and current rating. A typical door-interlock switch is rated at 15 amps with 125 or 250 VAC applied. When replacing an interlock switch, these ratings must be met or exceeded, otherwise premature switch failure will result. A...
Page 16 - Set the ohmmeter to read ohms at a scale of R X 1; Attention Appliance Repair
The Interlock Switches Used In Microwave Ovens terminal. This extruding lever must be pressed down while gently pulling the connector off the terminal. 5. Set the ohmmeter to read ohms at a scale of R X 1 6. As shown in the picture, place one meter probe on the COM terminal and the other probe on th...
Page 17 - A Complete Course In Commercial &; Step up to a new level of; Copyright © Information
The Interlock Switches Used In Microwave Ovens A Complete Course In Commercial & Residential Microwave Oven Repair Step up to a new level of instruction! Copyright © Information Unless otherwise noted, all materials at this cite (including without limitation all text, html markup, graphics, and ...
Page 18 - The Purpose of the Triac; The triac; Please read the; How To Test the Triac
How To Test the Triac The Purpose of the Triac © 1996-2002 J. Carlton Gallawa . All Rights Reserved Worldwide The triac is an electronic relay or switch. Triacs come in many shapes, sizes and colors. The black and white illustration to the right shows most of the types of triacs that are commonly us...
Page 19 - Test One; produce a normal reading of infinity:; c. From each terminal to chassis ground; Test Two; Any abnormal tests would suggest a defective triac.
How To Test the Triac Test One 1. Unplug the oven. 2. DISCHARGE THE HIGH VOLTAGE CAPACITOR. (Procedure) 3. First identify the terminals. The three terminals are generally designated as G (gate), T1 and T2. (A rule of thumb:smallest terminal is the gate; medium sized is T1; largest is T2.) 4. Careful...
Page 20 - This is THE definitive step-
How To Test the Triac ● Send us E-mail: [email protected] CLICK HERE ● If you would like to learn more about repairing commercial, industrial and residential microwave ovens and become part of a multi-million dollar service industry, we invite you to take a look at Microtech's highly acclaimed C...
Page 22 - The Purpose of the High Voltage Transformer in; Please read our
High Voltage Transformer Test The Purpose of the High Voltage Transformer in Microwave Ovens Excerpts from the book The Complete Microwave Oven Service Handbook --NOW available on CD-ROM ( CLICK HERE) and from the video You Can Fix Your Microwave Oven, Plus VCR Know-How - Copyright ©, 1989-2000 by J...
Page 23 - Disconnect the high-voltage lead from
High Voltage Transformer Test How To Test The High-Voltage Transformer 1. UNPLUG the oven. 2. DISCHARGE ALL HIGH-VOLTAGE CAPACITORS. (Procedure) 3. Disconnect the high-voltage lead from the transformer's high-voltage terminal (or tap). 4. With an ohmmeter set to the lowest resistance scale, R X 1, m...
Page 24 - Illustration from THE COMPLETE; THE COMPLETE MICROWAVE OVEN SERVICE HANDBOOK 2002
High Voltage Transformer Test Illustration from THE COMPLETE MICROWAVE OVEN SERVICE HANDOOK If you would like to learn more about repairing commercial and residential microwave ovens and become part of a multi-million dollar service industry, we invite you to take a look at Microtech's powerful new ...
Page 26 - Important; Microwave Ovens Are Dangerous Appliances to Work On; he microwave oven; is one of the most dangerous appliances to repair. The; caution and proper procedures MUST be used at all times.; with the power disconnected
Microwave Oven Repair Safety Precautions Website Directory: Microtech Home Page Microwave Oven FiX Finder Case History Database CD-ROM Home Page CD-ROM Samples Search Our Website Ordering Information Send email Microwave Oven FAQ Related Links About the author, J. Carlton Gallawa Copyright © Informa...
Page 27 - FIRST; and; , before attempting any repairs, make certain that the unit is not; ALWAYS; How To Discharge The High Voltage Capacitor:; The capacitor is; NEVER; This combined with the potential for high current makes the; HIGH VOLTAGE; For this reason, most manufacturers pointedly warn that
Microwave Oven Repair Safety Precautions SUBMIT your REPAIR TIP Glossary of Electronic and Microwave Oven Related Terms Microtech Home Page Microwave Oven FiX Finder Case History Database CD-ROM Home Page CD-ROM Samples Search Our Website Ordering Information Send email Microwave Oven FAQ Related Li...
Page 28 - live tests; RF leakage test procedure:; before
Microwave Oven Repair Safety Precautions Microwave Oven Parts Suppliers/ Manufacturer Contacts SUBMIT your REPAIR TIP Glossary of Electronic and Microwave Oven Related Terms Microtech Home Page Microwave Oven FiX Finder Case History Database CD-ROM Home Page CD-ROM Sampless Search Our Website Orderi...
Page 29 - Master Repair Database; interest to leave the repair to a qualified professional.
Microwave Oven Repair Safety Precautions Copyright © Information Microwave Oven Parts Suppliers/ Manufacturer Contacts SUBMIT your REPAIR TIP Glossary of Electronic and Microwave Oven Related Terms Microtech Home Page Microwave Oven FiX Finder Case History Database CD-ROM Home Page CD-ROM Samples Se...
Page 30 - and record the temperature of the heated water.
Output Power Test How To Check the Output Power (wattage) of a Microwave Oven © 1996 J. Carlton Gallawa . All Rights Reserved Worldwide Over the years manufacturers have used several different methods to rate the output wattage of microwave ovens. First, there was the traditional method. Then, in 19...
Page 31 - Dual Magnetron Systems; output wattage check
Output Power Test Dual Magnetron Systems Most of the higher-powered commercial models use two 700-watt magnetron tubes, each with their respective high-voltage systems, which produces an output of 1400 watts. Amana's new RC22, DQ22 and MC22 models use three magnetrons to produce a 2200 watt output. ...
Page 32 - The High Voltage Relay Used In Microwave Ovens; The high voltage relay; How To Test The High Voltage Relay
High Voltage Relays The High Voltage Relay Used In Microwave Ovens © 1996-2002 J. Carlton Gallawa . All Rights Reserved Worldwide The high voltage relay , also called the variable power switch, is a special type of relay. It is operated by the control panel, but it performs its switching in the high...
Page 35 - high-voltage capacitor; Before making this or any other test:
How to Test The High-Voltage Diode (Rectifier) Used In Microwave Ovens How To Test the High Voltage Rectifier (Diode) © 1996-2001 J. Carlton Gallawa . All Rights Reserved Worldwide The high-voltage rectifier (diode) works along with the high-voltage capacitor to effectively double the already-high v...
Page 36 - Test 1; diode is open. In each case the diode must be replaced.
How to Test The High-Voltage Diode (Rectifier) Used In Microwave Ovens Please read our disclaimer at the bottom of this page. Test 1 1. Unplug the oven. 2. DISCHARGE ALL HIGH VOLTAGE CAPACITORS. (Procedure) 3. Carefully remove the lead that goes to the capacitor (the ground connection may remain att...
Page 38 - The high-voltage capacitor works along with the; ALWAYS MAKE SURE; How To Dishcarge The High Voltage Capacitor
How to Test The High Voltage Capacitor Used In Microwave Ovens How To Test the High Voltage Capacitor © 1996-2001 J. Carlton Gallawa . All Rights Reserved Worldwide The high-voltage capacitor works along with the high-voltage diode to effectively double the already-high voltage from the secondary (o...
Page 39 - Capacitor Test Procedure
How to Test The High Voltage Capacitor Used In Microwave Ovens d. Older Amana-made models (generally those manufactured before 1977) have red, round filter capacitors mounted in the base of the magnetron tube which can also hold a charge. Ground each magnetron terminal by creating a short circuit to...
Page 40 - The material
How to Test The High Voltage Capacitor Used In Microwave Ovens Would you like to learn more? Here is Microtech's acclaimed textbook on CD-ROM! Widely recommended by electronic & appliance repair shops, technical students and do-it-yourselfers. You get up-to-the-minute service information. Explor...
Page 42 - The Microwave Oven Voltage-Doubler Circuit; Theory of Operation; The Complete Microwave Oven Service Handbook; You Can Fix Your Microwave Oven, Plus VCR Know-How; capacitor; effective; Peak voltage
The Voltage Doubler Circuit Used In Microwave Oven High Voltage Systems The Microwave Oven Voltage-Doubler Circuit Theory of Operation Excerpts from the book The Complete Microwave Oven Service Handbook --NOW available on CD-ROM ( CLICK HERE ) and from the video You Can Fix Your Microwave Oven, Plus...
Page 43 - The Half-Wave Voltage Doubler; Figure 2A; negative
The Voltage Doubler Circuit Used In Microwave Oven High Voltage Systems Voltage-doubler circuits are fed with the stepped-up AC voltage from the high-voltage transformer's secondary (or output) winding. Typically, a transformer would step up 115 volts to about 2000 volts, which would have an approxi...
Page 44 - A Word of Warning; The circuits described here; HIGH; LEARN
The Voltage Doubler Circuit Used In Microwave Oven High Voltage Systems two energy sources in series. The 2800 volts across the transformer winding adds to the 2800 volts stored in the capacitor and the sum voltage of 5600 volts is applied to the magnetron cathode . There are two fundamental charact...
Page 45 - Back
The Voltage Doubler Circuit Used In Microwave Oven High Voltage Systems All materials appearing on this website may not be reproduced, stored in any retrieval system, or used in any way for commercial purposes without the express prior written permission of the copyright holder. Send correspondence ...
Page 46 - The Magnetron Tube; Basic Magnetron Structure
The Magnetron Tube:Structure and Operation The Magnetron Tube Structure and Operation Excerpts from the book The Complete Microwave Oven Service Handbook --NOW available on CD-ROM ( CLICK HERE ) Copyright ©, 1989-2001by J. Carlton Gallawa and from the video You Can Fix Your Microwave Oven, Plus VCR ...
Page 47 - Basic Magnetron Operation
The Magnetron Tube:Structure and Operation The FILAMENT (also called heater), which also serves as the cathode of the tube, is located in the center of the magnetron, and is supported by the large and rigid filament leads, which are carefully sealed into the tube and shielded. The ANTENNA is a probe...
Page 49 - Available NOW on Interactive Multimedia CD-ROM; Completely Updated; THE COMPLETE MICROWAVE OVEN SERVICE; Repair Answerbook on CD-ROM; HTML Samples
Complete Microwave Oven Repair Handbook on CD-ROM: Operation, Troubleshooting, Repair Available NOW on Interactive Multimedia CD-ROM Completely Updated Plus: ● YOU GET all the information from key video segments of the acclaimed 4-hour instructional video, The Complete Microwave Oven Service Handboo...
Page 51 - The Complete; Troubleshooting & Repair
Complete Microwave Oven Repair Handbook on CD-ROM: Operation, Troubleshooting, Repair "After viewing this CD, all I can say is, 'WOW!' and again, 'WOW!' These were the same sentiments expressed by my experienced technician who works on microwave ovens for my business… I don't know how much this ...
Page 52 - Actual Dissected Magnetron Tube
Typical Magnetron Anode and Resonant Structure Actual Dissected Magnetron Tube Photo courtesy of Sam Goldwasser:Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ | Back | Send Email | Top of Page | Home Page | http://www.gallawa.com/microtech/maganode.html6/7/2004 4:08:46 PM
Page 53 - From the book on CD-ROM; The COMPLETE MICROWAVE OVEN SERVICE HANDBOOK
Safety of Microwaves Used In Microwave Ovens - From the book on CD-ROM , The COMPLETE MICROWAVE OVEN SERVICE HANDBOOK Operation, Maintenance, Troubleshooting and Repair Copyright © 1989-2000 J. Carlton Gallawa . All Rights Reserved Worldwide 3.1 INTRODUCTION In 1926, Soviet naturalist Vernadskii wro...
Page 54 - Paul Brodeur, The Zapping of; MEASURING MICROWAVES
Safety of Microwaves Used In Microwave Ovens The world of medicine uses them for sterilization, to retard tumor growth, and to treat sore muscles. Industry and science each have their own uses for microwaves. Researchers in Canada have developed an aircraft that can stay aloft for months at a time w...
Page 55 - ) or higher. It was theorized that a built in
Safety of Microwaves Used In Microwave Ovens through one square centimeter (a square centimeter is about the size of an aspirin tablet) of space in one second. Western scientists believed that serious injuries could result only at levels of 100 Milliwatts per square Centimeter (mw/ cm 2 ) or higher....
Page 57 - of microwave energy, then you wisely step back to a distance of 20
Safety of Microwaves Used In Microwave Ovens level of exposure to any energy that may be leaking decreases dramatically. This may be likened to holding your hand immediately above a burning candle as opposed to holding it 4, 8 or 12 inches away. Say you are standing 2 inches away from a microwave ov...
Page 58 - MICROWAVES AND CARDIAC PACEMAKERS
Safety of Microwaves Used In Microwave Ovens that the human fetus is "probably the most sensitive segment of the population potentially exposed to microwave radiation." Children represent another sensitive segment of the population. Never should anyone, and especially children, stand gazing ...
Page 59 - RADIATION INJURIES FROM MICROWAVE OVENS?; A Final Word
Safety of Microwaves Used In Microwave Ovens pacemaker. Since microwaves, or any other type of electronic interference, cannot penetrate their stainless steel casing, the possibility of harm to people who wear these modern heart pacemakers is extremely remote. In an effort to determine the overall s...
Page 60 - BACK
Safety of Microwaves Used In Microwave Ovens As with so many modern conveniences, the benefits must be weighed against the hazards, the risks against the rewards. Sometimes this can be a delicate and a controversial balance. So, while these devices must be used at one’s own risk, the application of ...
Page 61 - THE COMPLETE MICROWAVE OVEN SERVICE HANDBOOK
Introduction to the High Voltage System Used in Microwave Ovens THE COMPLETE MICROWAVE OVEN SERVICE HANDBOOK : Operation, Maintenance, Troubleshooting and Repair Copyright © 1989-2000 J. Carlton Gallawa . All Rights Reserved Worldwide 7.1 INTRODUCTION The purpose of the high-voltage system (Fig. 7-1...
Page 63 - BASIC MAGNETRON OPERATION
Introduction to the High Voltage System Used in Microwave Ovens elaborated on. The MAGNETIC FIELD is provided by strong permanent magnets, which are mounted around the magnetron so that the magnetic field is parallel with the axis of the cathode. 7.3 BASIC MAGNETRON OPERATION The theory of magnetron...
Page 64 - The High-Voltage System
The Magnetron Tube THE COMPLETE MICROWAVE OVEN SERVICE HANDBOOK : Operation, Maintenance, Troubleshooting and Repair Copyright © 1989-2000 J. Carlton Gallawa . All Rights Reserved Worldwide Chapter Seven: The High-Voltage System (continued) ence of electric and magnetic fields. For the tube to opera...
Page 74 - A simple step-up transformer consists of an
Proper Phasing and Life Expectancy of Magnetrons Used in Microwave Ovens continual operation at the upper limit of its heat tolerance due to inadequate air circulation, 7) obstruction in the wave-guide, 8) failed stirrer operation. Coverage of magnetron failure modes, testing, and replacement proced...
Page 77 - Control Systems
Microwave Oven Control Systems - Theory of Operation THE COMPLETE MICROWAVE OVEN SERVICE HANDBOOK : Operation, Maintenance, Troubleshooting and Repair Copyright © 1989-2000 J. Carlton Gallawa . All Rights Reserved Worldwide Chapter Eight: Control Systems (continued) 8.13.1 System Operation The repre...
Page 79 - SOLID STATE COMMERCIAL TIMERS
Microwave Oven Control Components: Tests and Failures BACK | HOME | ABOUT THIS CD-ROM | ABOUT THE AUTHOR Exerpts from the CD-ROM: THE COMPLETE MICROWAVE OVEN SERVICE HANDBOOK : Operation, Maintenance, Troubleshooting and Repair Copyright © 1989-2000 J. Carlton Gallawa . All Rights Reserved Worldwide...
Page 81 - Either a continuous beep or buzz or none at all.; DOMESTIC CONTROL CIRCUITS—CHECKS AND FAILURES
Microwave Oven Control Components: Tests and Failures Either a continuous beep or buzz; or none at all. SYMPTOM: The timer buttons remain depressed, thus holding the oven in a continuous cook mode. Litton and some other models use individual pushbuttons that are soldered on to the printed circuit bo...
Page 82 - The time-of-day clock does not hold or keep the correct time.
Microwave Oven Control Components: Tests and Failures (using insulated alligator clips) capable of the measuring the intended voltage to the input terminals of the component in question. (When no technical data is available, the appropriate drive voltage for a given component can usually be ascertai...
Page 83 - itself by erasing the display—except possibly for the colon.; Membrane Touch Panel Evaluations and Considerations
Microwave Oven Control Components: Tests and Failures itself by erasing the display—except possibly for the colon. SYMPTOM: If while counting down, the display jumps or skips time, suspect the panel if the grounding is proper and the polarity correct. SYMPTOM: The control module (Amana) appears to b...
Page 84 - Appendix I
Microwave Oven Control Components: Tests and Failures the ribbon connector from the control board removes it. 4) Some or all pads must be pressed hard or pressed several times to produce a response. 5) The number displayed is different from the one pressed (i.e., press the "5" pad and a "...
Page 86 - Samples from the; AMANA
Samples from The Master Microwave Oven Repair Guide Samples from the Master Microwave Oven Repair Guide Copyright © 1998-2000 by John C. Gallawa. All rights reserved worldwide. AMANA Models: DQ22HS, RC22, RC22S, RC22MP, RC22MPS, MC22MP, MC22MPT (Commercial models) Symptom: Display shows PCE6 Problem...
Page 87 - PANASONIC; No heat, weak heat, or intermittent heat; electrical burning smell.; SHARP; Convection heat is too hot-burning things.
Samples from The Master Microwave Oven Repair Guide PANASONIC Model: NE-8021, NE-8051, NN-4208A, NN-5407, NN-5500A, NN-5512A, NN-6370WM, NN- 6371WM.N, NN-6372AWM, NN-6381A, NN-6482A, NN-6503A, NN-7524AK Symptom: No heat, weak heat, or intermittent heat Problem: Magnetron filament connectors have loo...
Page 88 - Arcing in cooking the compartment; TAPPAN
Samples from The Master Microwave Oven Repair Guide SHARP Model: R-3A75, R-4A84, R-4K52, R-5A50, R-5A82, R-5A84, R-5F80, R-5K81, R-4260, R-4840, R- 5560, R-5565, R-9200, R-9350, R-9480 Symptom: Arcing in cooking the compartment Problem: Bits of food or other cooking debris has lodged beneath the wav...
Page 89 - Microwave Oven Repair Instructions
FREE Microwave Oven Repair and Fix Finder Welcome to Microtech's (Updated 1/2002) © 1989-2002 J. Carlton Gallawa A Free, On-Line Case History Database of Commercial and Residential Microwave Oven Repairs: Symptoms, Problems and Solutions Important Safety Information for Repairing Microwave Ovens Rep...
Page 90 - Click here; Common Sense Troubleshooting of Microwave Ovens; appropriate microwave oven repair
FREE Microwave Oven Repair and Fix Finder Click here if you would like to be notified by e-mail when this page is updated. We hope that you find the information here helpful... Common Sense Troubleshooting of Microwave Ovens Effective troubleshooting begins with a systematic approach. The objective ...
Page 91 - Microwave Oven Parts Suppliers & Manufacturer Contacts
FREE Microwave Oven Repair and Fix Finder © 1989-2002 J. Carlton Gallawa . All Rights Reserved Worldwide Search our Site: sitemap A to J | K to 0 | P to Q | R to Z | Home Page | Safety Information | Back | CD-ROM | Links | FAQ | Microwave Oven Parts Suppliers & Manufacturer Contacts You can cont...
Page 92 - Microtech; This page includes the brands:; Admiral to JCPenney; Instructions on How To Diagnose and Repair Microwave Ovens
Microwave Oven Service and Repair Histories: Amana through JCPenney Microtech © 1998-2002 J. Carlton Gallawa All Rights Reserved Worldwide Last updated 1/2002 This page includes the brands: Admiral to JCPenney Page 1 Instructions on How To Diagnose and Repair Microwave Ovens 1. After reading the saf...
Page 93 - MICROWAVE OVEN REPAIR CASE HISTORY DATABASE
Microwave Oven Service and Repair Histories: Amana through JCPenney taken in the preparation of this material, we assume no responsibility for omissions or errors. © 1996-2002 J. Carlton Gallawa All Rights Reserved Worldwide © Copyright Information MICROWAVE OVEN REPAIR CASE HISTORY DATABASE AMANA M...
Page 95 - EMERSON; FRIGIDAIRE; FRIGIDAIRE
Microwave Oven Service and Repair Histories: Amana through JCPenney Problem: Shorted high voltage transformer. Test: High Voltage Transformer Test Solution: Replace transformer. Amana part #.D7474103. Price: $143.53 AMANA Model: RCS 720A Symptom: Door must be pushed or jiggled before oven will cook....
Page 96 - To Page 2; Parts Suppliers and Manufacturer Contacts; THE COMPLETE MICROWAVE OVEN SERVICE HANDBOOK 2000
Microwave Oven Service and Repair Histories: Amana through JCPenney Symptom: Heats unevenly Problem: (1) After a period of years, the center of the grease shield begins to sag. This diminishes the air- swirling action that is required to rotate the antenna [which functions to evenly distribute the m...
Page 97 - Montgomery Wards
Microwave Oven Repair Case Histories for the Brands Kenmore through Montgomery Wards Microtech © 1998-2002 J. Carlton Gallawa All Rights Reserved Worldwide Last updated 1/2002 This page includes the brands: Kenmore (Sears) to Montgomery Wards Page 1 Instructions for Troubleshooting and Repairing App...
Page 100 - Triac Test; LITTON; High Voltage Diode Test; LITTON
Microwave Oven Repair Case Histories for the Brands Kenmore through Montgomery Wards KENMORE (Sears) 566.8844780 DEAD WHEN WENT TO USE Problem: Weakened fuse clips in the fuse receptacle causing fuse to melt due to resistive heat. Usually indicated by a bead of solder leaching out from either endcap...
Page 101 - Low Voltage Transformer Test
Microwave Oven Repair Case Histories for the Brands Kenmore through Montgomery Wards Model: 1580.000 Symptom: Works normally for awhile, then shuts off Problem: Deteriorated connections at interface board Solution: Clean the interface board edge connector and pins LITTON Model: 70-50.08 Symptom: Bro...
Page 102 - Let us know what you think, or submit your own repair tip
Microwave Oven Repair Case Histories for the Brands Kenmore through Montgomery Wards Let us know what you think, or submit your own repair tip [email protected] Stop and think about what you need to improve your electronics knowledge and job skills. Whether you are a do-it-yourselfer, a technical st...
Page 103 - This page includes case histories of the; Panasonic to Quasar; Instructions on How To Troubleshoot and Repair Microwave Ovens
Free Microwave Oven Repair Histories: Panasonic through Quasar Microtech © 1998-2002 J. Carlton Gallawa All Rights Reserved Worldwide Last updated 1/2002 This page includes case histories of the brands: Panasonic to Quasar Page 1 Instructions on How To Troubleshoot and Repair Microwave Ovens 1. Afte...
Page 106 - The COMPLETE MICROWAVE OVEN SERVICE
Free Microwave Oven Repair Histories: Panasonic through Quasar Finally, an instructional CD-ROM that actually instructs! Yes, practical education: Thorough without being vague, specific without being trivial. Here is a step-by-step guide to the electronic repair skills you need to profit from the ch...
Page 107 - This page includes case; Samsung to; Microwave Ovens; We hope that you find the information here helpful..
Free Microwave Oven Repair Histories: Categories Samsung through Whirlpool Microtech © 1998-2002 J. Carlton Gallawa All Rights Reserved Worldwide Last updated 1/2002 This page includes case histories of the brands: Samsung to Whirlpool Page 1 Instructions On How To Use This Information For Troublesh...
Page 108 - All Rights Reserved Worldwide.; Timer counts down, but nothing else operates; SAMSUNG
Free Microwave Oven Repair Histories: Categories Samsung through Whirlpool Repairing a microwave oven is a dangerous task. For your personal safety, please do not proceed unless you fully understand and are prepared to follow carefully these appropriate safety precautions . Disclaimer: The author as...
Page 109 - bead of solder leaching out from either endcap; High-Voltage Transformer Test; SANYO; High-Voltage Capacitor Test; SANYO; SANYO
Free Microwave Oven Repair Histories: Categories Samsung through Whirlpool Symptom: Oven went dead between uses Problem: Weakened fuse clips in the fuse receptacle causing fuse to melt due to resistive heat. Usually indicated by a bead of solder leaching out from either endcap and/or evidence of ove...
Page 110 - Illustration from THE COMPLETE MICROWAVE
Free Microwave Oven Repair Histories: Categories Samsung through Whirlpool Problem: Weakened fuse clips in the fuse receptacle causing fuse to melt due to resistive heat. Usually indicated by bead of solder leaching out from either endcap and/or evidence of overheating (or burned spot) at the endcap...
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