LG Electronics MS3447GRS Measurement with Outer Case Removed, Around the magnetron Waveguide

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MEASUREMENT WITH OUTER CASE REMOVED

•When you replace the magnetron, measure for microwave energy leakage before the outer case is installed and after all necessary components are replaced or adjusted.

Special care should be taken in measuring the following parts. (Circled area of Fig. below)

-Around the magnetron

-The waveguide

WARNING : AVOID CONTACTING ANY HIGH VOLTAGE PARTS

MEASUREMENT WITH A FULLY ASSEMBLED OVEN

•After all components, including the outer case, are fully assembled, measure for microwave energy leakage around the door viewing window, the exhaust opening, and air inlet openings.

•Microwave energy leakage must not exceed the values prescribed below.

NOTE: Leakage with the outer case removed less than 5 mW/cm.sq. Leakage for a fully assembled oven (Before the latch switch (primary) is interrupted) with the door in a slightly opened position-less than 2 mW/cm.sq.

NOTES WHEN MEASURING

•Do not exceed meter full scale deflection.

•The test probe must be moved no faster than

1 inch/sec (2.5 cm/sec) along the shaded area, otherwise a false reading may result.

•The test probe must be held by the grip portion of the handle.

A false reading may result if the operator's hand is between the handle and the probe.

•When testing near a corner of the door, keep the probe perpendicular to the surface making sure the probe horizontally along the oven surface. Hold vertically when testing the top and bottom, and horizontally along.

RECORD KEEPING AND NOTIFICATION AFTER MEASUREMENT

•After adjustment and repair of any microwave energy interruption or microwave energy blocking device, record the measured values for future reference. Also enter the information on the service invoice.

•The microwave energy leakage should not be more than 4 mW/cm.sq. after determining that all parts are in good condition, functioning properly and genuine replacement parts which are listed in this manual have been used.

•At least once a year, have the electromagnetic energy leakage monitor checked for calibration by its manufacturer.

Copyright © 2007 LG Electronics. Inc. All right reserved.

5-2

LGE Internal Use Only

Only for training and service purposes

 

 

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Contents Microwave Oven Safety Precautions Microwave RadiationContents Specifications Full power throughout the cooking timeApprox % of Full power Approx %Microwave Radiation AntennaInstallation InstallingEarthing Instructions Features Control Panel Operating InstructionsMore Pressing More will add 10 seconds to the cooking time Cooking timeOperating Sequence Schematic Diagram Circuit Description Service Information Tools and Measuring InstrumentsMicrowave Leakage Test Necessary ToolsMeasurement with Outer Case Removed Measurement with a Fully Assembled OvenAround the magnetron Waveguide Measurement of Microwave Power Output Disassembly and AdjustmentPower Supply Cord Control Panel AssemblyPCB Assembly Removal Door Main Assembly RemovalAIR Duct Assembly Removal Magnetron RemovalRemoving the Turntable Motor Very CarefullyFAN Motor Assembly Removal High Voltage Transformer RemovalHigh Voltage Capacitor and Diode Removal Interlock SystemPrimary Interlock Switch Test Secondary Interlock Switch TestMonitor Switch Test SwitchesComponent Test Procedure High Voltage Transformer Wire leads removedFilament Winding Primary Terminal MagnetronHigh Voltage Measure the resistance Normal Momentarily indicatesCapacitor Measure the continuity Forward Normal ContinuityPower RelayLevel FAN MotorTrouble Shooting Condition Cause RemedyDefective PCB assembly Defective key membrane assembly Defective PCB assemblySome inputs cannot be programmed Continuity No continuityCheck continuity Continuity Monitor Switch with Door closed Power supplyReplace power supply cord Fuse blowsSetting time Check continuity Secondary switchDefective PCB Replace PCB Assembly Power source Rating voltage Voltage Normal DisconnectDefective PCB assembly Defective high voltage transformer Abnormal Defective PCB assemblyReplace high voltage diode Replace magnetron Exploded View IntroductionDoor Parts Control Panel Parts Oven Cavity Parts Larch Board Parts Interior Parts WTT021 WTP004 56501A 54974TBase Plate Parts

MS3447GR, MS3447GRS specifications

The LG Electronics MS3447GRS and MS3447GR are innovative microwave models designed to enhance your cooking experience with a blend of advanced technology and user-friendly features. Both models are built to accommodate various culinary needs, making them ideal for any kitchen.

One standout feature of the MS3447GRS and MS3447GR is the Smart Inverter technology. This technology provides precise cooking power control, allowing users to defrost, reheat, and cook food evenly. This results in better texture and flavor retention in various dishes, surpassing traditional microwaves that may only provide two or three levels of heating.

Another significant characteristic is the EasyClean interior. This feature ensures that maintaining a clean microwave is hassle-free. The interior surface can be wiped down easily, helping to prevent the buildup of food residues and odors, which allows for a more hygienic cooking environment over time.

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Additionally, these models boast a sleek and modern design that seamlessly integrates into any kitchen decor. The clean lines, polished finishes, and intuitive control panel make it an attractive and functional appliance. The user interface is designed for ease of use, with clear indicators and a layout that simplifies operation.

Both microwaves feature a spacious interior, which provides ample room for a variety of cookware sizes, making it easier to heat larger dishes. The turntable ensures that food is cooked evenly, while the powerful wattage guarantees efficient cooking times.

In conclusion, the LG Electronics MS3447GRS and MS3447GR microwave models are exemplary devices that combine cutting-edge technology with practical features. Their Smart Inverter, EasyClean technology, and flexible cooking options cater to the needs of modern kitchens, affirming LG's commitment to innovation and quality in kitchen appliances. Whether you're reheating leftovers or preparing a family meal, these microwaves make cooking simpler and more efficient.
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