Why is my LG MH-1357M sparking?
Sparks can occur in your LG Microwave Oven for several reasons: * Using metallic ware that touches the oven wall. Avoid metallic ware, unless specifically allowed in the cookbook. * Using ceramic ware with gold or silver powder trimming. Do not use cookware with metallic trimming. * Food does not turn during cooking. If food or cookware extends beyond the turntable edges, rearrange it to allow turning.
Why is the temperature in my LG MH-1357M Microwave Oven lower or higher than preset?
If the temperature in your LG Microwave Oven is not as expected, it could be due to: * A defective relay 4 or 2 of the P.C.B. * A defective convection heater element. * A defective thermistor. * A defective circulation motor. * A defective drive mechanism of the circulation fan. Check and repair the drive mechanism. * A defective Solenoid. * A defective air duct assembly. Check and repair the air duct assembly.
Why won't the oven light turn on when I open the door of my LG MH-1357M Microwave Oven?
If the light in your LG Microwave Oven doesn't turn on when you open the door: * There might be no power in your home. Check the wall outlet. * There could be an open wire in the power cord or wire harness. Replace or repair the wiring. * The oven lamp switch may be defective or out of adjustment. * The oven light itself might be defective and need replacement. * There might be an open or loose wire connection to the components. Check the wiring. * The fuse or oven light may be blown.
Why doesn't the oven light turn on during the cook cycle in my LG MH-1357M Microwave Oven?
If the oven light doesn't turn on during the cook cycle in your LG Microwave Oven, it could be due to: * A defective relay 3 of the P.C.B.
Why does the turntable motor operate normally but circulation motor does not operate in my LG MH-1357M?
If the turntable motor works but the circulation motor doesn't in your LG Microwave Oven: * Relay 4 of the P.C.B. may be defective. * The circulation motor itself could be defective. * There might be open or loose wiring to the circulation motor. Check and repair the wiring.
What to do if ":0" does not appear in display window when power cord is first plugged into wall outlet of my LG MH-1357M?
If ":0" does not appear in the display when you first plug in your LG Microwave Oven: * Ensure the microwave oven plug is fully and securely inserted into the wall outlet.
General| Brand | LG |
|---|---|
| Model | MH-1357M |
| Category | Microwave Oven |
| Language | English |
Instructions for properly grounding the microwave oven before servicing.
Details on indicator lights, display window, and button functions.
Examples of time, temperature, cooking power, and error displays.
Explanation of how microwave energy cooks food evenly.
How hot air and combined modes cook food.
Procedure for setting the time of day and using the regular timer.
Steps for operating microwave and convection cooking modes.
Instructions for combination, automatic defrost, and reheat functions.
How to use popcorn feature and set/cancel child lock.
Circuit diagram for the oven in stand-by mode.
Circuit diagram for the oven during microwave cooking.
Circuit diagram for the oven during convection cooking.
Description of the magnetron's role and how to test it.
Explains the purpose of oven lamp, turntable motor, thermostats, and door mechanism.
Details on primary, secondary, and monitor interlock switches.
How convection heating, chamber, and damper work.
List of standard tools required for TV servicing.
List of specialized instruments for testing and measurement.
Procedure for installing the primary, secondary, monitor, and lamp switches.
Steps to adjust interlock switches to prevent microwave leakage.
How to check continuity of primary and secondary interlock switches.
Procedure to test the monitor switch continuity.
Steps to remove the oven's outer case and door.
Procedure for disassembling the control panel and PCB.
Steps to remove the magnetron and cooling fan motor.
Procedure for removing high voltage diode and capacitor.
Steps for removing the high voltage transformer and turntable motor.
How to remove primary, secondary, monitor, and lamp switches.
Procedures to test the resistance of HV transformer and magnetron.
How to measure resistance for motors and check switch continuity.
Testing the continuity of PCB relays for cooking functions.
Techniques for measuring microwave leakage with equipment.
How to test leakage on a fully assembled oven.
Illustrated list of all parts related to the oven door.
Illustrated list of components for the control panel.
Illustrated list of parts making up the oven cavity.
Illustrated list of internal components within the oven.
Illustrated list of various switches used in the appliance.
Diagram showing the layout of components on the circuit board.
Detailed schematic showing the electrical connections of the circuit board.
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