LG Electronics LMV1825SBQ, MV1825SW service manual Fuse

Page 36

PROBLEM - G: Ventilation fan does not operate when FAN HIGH/LOW key is touched.

1

Check: 1. POWER SUPPLY

2. FUSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

Replace

 

 

contact

 

magnetron thermal fuse

 

 

 

 

 

 

and oven thermostat

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check the contact of magnetron thermal fuse and oven thermostat

Contact

 

Check contact

OK

 

of connector S1

 

 

(see page 7-4)

 

 

 

 

 

 

 

Runs

Poor contact

Correct

Normal

Runs

 

seating

contact

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contact OK

 

Replace

 

Normal

Runs

 

 

 

 

 

 

 

 

 

 

circuit board

circuit board

 

7-25

 

 

 

 

 

Runs

 

 

 

 

 

NO runs

 

Replace

Normal

 

 

 

 

ventilation

ventilation

 

 

motor ASS Y

motor ASS Y

 

Image 36
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