Related Manuals for LG MS-1907C
Summary of Contents for LG MS-1907C
- Page 1 MICROWAVE OVEN SERVICE MANUAL MODEL : MS-1907C CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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Page 2: Service Information
SERVICE INFORMATION TOOLS AND MEASURING INSTRUMENTS NECESSARY TOOLS NECESSARY MEASURING INSTRUMENTS Tools normally used for TV servicing are sufficient. ¥ TESTER(VOLTS-DC, AC., Ohmmeter) Standard tools are listed below. ¥ Microwave survey meter ¥ Diagonal pliers - Holaday HI-1500 ¥ Long nose pliers HI-1501 ¥... -
Page 3: Measurement With Outer Case Removed
MEASUREMENT WITH OUTER CASE NOTES WHEN MEASURING REMOVED ¥ Do not exceed meter full scale deflection. ¥ The test probe must be removed no faster than ¥ When you replace the magnetron, measure for 1 inch/sec (2.5 cm/sec) along the shaded area, microwave energy leakage before the outer case is otherwise a false reading may result. -
Page 4: Measurement Of Microwave Power Output
MEASUREMENT OF MICROWAVE POWER OUTPUT ¥ Microwave power output measurement is made with ¥ The microwave power output P in watts is calculated the microwave oven supplied at its rated voltage and from the following formula : operated at its maximum microwave power setting with 4187 x (ÆT) a load of (1000±5) g of potable water. -
Page 5: Fan Motor Assembly Removal
D. DOOR GROSS ASSEMBLY REMOVAL E. HIGH VOLTAGE TRANSFORMER 1) Open the door. REMOVAL 2) Remove the choke cover very carefully with a flat- 1) Discharge the high voltage capacitor. blade screwdriver. 2) Disconnect the leadwire from magnetron, high voltage CAUTION : Be careful not to damage door seal plate transformer, and capacitor. -
Page 6: Magnetron Removal
H. AIR DUCT ASSEMBLY REMOVAL J. REMOVING THE TURNTABLE MOTOR 1) Disconnect the leadwire from lamp, A.C Relay and 1) Remove the turntable. monitor resistor. 2) Remove the turntable shaft VERY CAREFULLY. 3) Lay the unit down on its back. 2) Remove the mounting screw to the magnetron. -
Page 7: Interlock System
K. TIMER MOTOR REMOVAL L. INTERLOCK SYSTEM 1) Remove the control panel assembly from the 1) INTERLOCK MECHANISM cavity. The door lock mechanism is a device which has 2) Remove screws which hold the timer motor to the been specially designed to eliminate completely control panel. -
Page 8: Interlock Continuity Test
INTERLOCK CONTINUITY TEST WARNING : FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION, REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS. TYPE NO. SZM-V 16-FA-63 OR VP-533A-OF FOR PRIMARY SWITCH TYPE NO. SZM-V 16-FA-61 OR VP-531A-OF FOR MONITOR SWITCH TYPE NO. SZM-V 16-FA-63 OR VP-533A-OF FOR SECONDARY SWITCH B. -
Page 9: Component Test Procedure
COMPONENT TEST PROCEDURE CAUTIONS 1. DISCONNECT THE POWER SUPPLY CORD FROM THE OUTLET WHENEVER REMOVING THE OUTER CASE FROM THE UNIT. PROCEED WITH THE TEST ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR AND REMOVING THE WIRE LEADS FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER. -
Page 10: High Voltage Capacitor
COMPONENTS TEST PROCEDURE RESULTS Antenna Gasket Chassis Filament Terminals NOTE: When testing the magnetron, be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition. HIGH VOLTAGE Measure the resistance. Normal: Momentarily indicates CAPACITOR (Ohm-meter scale: Rx1000) - Page 11 COMPONENTS TEST PROCEDURE RESULTS MAIN FUSE Check for continuity of the fuse with an Normal Abnormal multi-meter. NOTE: If the fuse is blown, check the primary, the secondary, and the monitor switches, H.V.D. and H.V.C. before replacing the fuse. If the fuse is blown by improper switch operation replace the defective switch and the fuse at the same time.
- Page 12 COMPONENTS TEST PROCEDURE RESULTS TIMER MOTOR Turn on Turn Off (Wire leads removed) (2-3) Approx. 25 K½ (2-M) Note: A is ON,OFF switch B is power supply terminal of the timer motor C is defrost switch (1-2) Measure the resistance. Normal: FAN MOTOR (Ohm-meter scale: R x 100)
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Page 13: Troubleshooting
TROUBLE SHOOTING WHEN YOU GET A COMPLAINT FROM YOUR CUSTOMER, EVALUATE THE COMPLAINT CAREFULLY. IF THE FOLLOWING SYMPTOMS APPLY, PLEASE INSTRUCT THE CUSTOMER IN THE PROPER USE OF THE MICROWAVE OVEN. THIS CAN ELIMINATE AN UNNECESSARY SERVICE CALL. CAUTIONS 1. Check grounding before checking for trouble. 2. - Page 14 (TROUBLE 1) Oven lamp does not turn on when the timer knob is pushed with door closed. CONDITION CHECK RESULT CAUSE REMEDY Malfunction of the Replace fuse, Check continuity 1. Fuse blows. Continuity. monitor switch. primary, monitor of monitor and secondary switch (with switches.
- Page 15 (TROUBLE 2) Oven does not start even though the timer is set. CONDITION CHECK RESULT CAUSE REMEDY 1. Oven does not Check the No continuity. Malfunction of the operate. continuity of the Adjust or replace. primary switch. primary switch with door closed.
- Page 16 (TROUBLE 4) Oven does not cook at all even though turntable rotates. CONDITION CHECK RESULT CAUSE REMEDY No microwave Replace the power Malfunction of the Check the No continuity. oscillation. control switch. power control power control switch. switch(cooking state). Continuity. Check the Abnormal or burn Defective monitor...
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Page 17: Exploded View
EXPLODED VIEW INTRODUCTION OVEN CAVITY PARTS INTERIOR PARTS BASE PLATE PARTS DOOR PARTS SUCTION GUIDE MAIN PARTS CONTROL PANEL PARTS... -
Page 18: Door Parts
DOOR PARTS 13581A 13552A 13536A 13213A 13720D 14026A 14970A 13352A... - Page 19 CONTROL PANEL ASSEMBLY PARTS 24781T 23572A 249401 26549T WTP015 249402 24510L 24970A 250201...
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Page 20: Oven Cavity Parts
OVEN CAVITY PARTS WTT021 33112U 948502 34930W WSZ092 33052M 33390G 948503 34036W 35889A 36549S 368771 WTP013... - Page 21 SUCTION GUIDE PARTS WSZ002 WTT028 50FZZA 56912B 56201A 56930V 43500A 568771 55900A 466001 466003 54974S WTT037 56549F 43501A 466001 WSZ084 WTT028...
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Page 22: Interior Parts
INTERIOR PARTS WSZ062 56411A 56324A WSZ002... -
Page 23: Base Plate Parts
BASE PLATE PARTS 56851D 50CZZH 54810C 56851C 56170D WSZ002 63302A 647781 948501 WTT028 647781 WSZ002 63303A...