LG Electronics LMV1825SBQ, MV1825SW service manual Test the Latch and Switch Sequence

Page 24

TEST THE LATCH AND SWITCH SEQUENCE

(5)Open the oven door slowly. Watch the door latch, the Secondary Switch. Release Rod and Lever on the switches to make sure they are zero to the body of the switches in the following sequence:

-Primary Interlock Switch

-Secondary Interlock Switch

-Interlock Monitor Switch

Adjust the latch board until the switches operate in this sequence. See Steps 3 and 4.

(6)Close the oven door slowly and be sure it is tightly closed. Watch the three switches to make sure they are zero to the body of the switches in the following sequence:

-Interlock Monitor Switch

-Primary Interlock Switch

-Secondary Interlock Switch

NOTE: The Interlock Monitor Switch is an added

safety check on the Primary and Secondary Interlock Switches. If the Primary and Secondary Interlock Switches allow the oven to operate with the door open, the Monitor Switch will blow the fuse.

(7)When you achieve the proper sequence of switches in Steps 5 and 6, tighten the latch board screws at that point.

TEST THE MICROWAVE ENERGY LEAKAGE

Make sure the microwave energy leakage is below the limit of 1mW/cm2 (with a 275 ml water load) and 5mW/cm2 (with a 275 ml water load without the cabinet) when measured with a survey meter.

7-13

Image 24
Contents Safety Precautions in this Manual Microwave OvenPage Table of Contents Specifications Microwave Radiation Installation Grounding InstructionsOperating Instructions Control PanelControl Panel Instructions Overall Circuit Diagram Schematic DiagramMatrix Circuit for Touch KEY Board General Precautions in USE Features and Specifications FeaturesTrial Operation Precautions and Repair Service Tips PreliminaryMicrowave Leakage Test EquipmentPower Output Measurement Measurement with the Outer Case RemovedDisassembly Instructions Important NotesHOW to Remove the F.P.C. Connector HOW to Insert the F.P.C. ConnectorRemoving the OUT CASEFigure Removing the Door Interlock Switches Figures 9,10 Removing Magnetron Removing Stirrer FAN Removing Door FigureAssembling Door Removing the Ventilation MotorReplacing the Humidity Sensor Removing the Turntable Motor Interlock System Interlock MechanismTest the Latch and Switch Sequence Components Test Procedure Results Interlock Continuity TestTest and Checkout PROCEDURES, and Trouble Shooting Test ProceduresHIGH-VOLTAGE Diode FPC Connector Checkout Procedures Power LevelCheckout Procedures for Relay Problem a Checkout Procedures for Circuit Board Trouble Shooting Circuit board Poor Check the contact of relay 2see Normal Operation Circuit board Fuse Exploded View Control Panel Oven Cavity Latch Board Interior 50FZZA Installation Schematic Diagram of P.C.B Printed Circuit Board May