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Summary of Contents for LG LMH1517CVST
- Page 1 This Owner's Manual is provided and hosted by Appliance Factory Parts. LG LMH1517CVST Owner's Manual Shop genuine replacement parts for LG LMH1517CVST Find Your LG Microwave Parts - Select From 955 Models -------- Manual continues below --------...
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Page 2: Microwave Oven
Website: http://us.lgservice.com MICROWAVE OVEN SERVICE MANUAL MODEL : LMH1517CVST CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Feb. 2002 P/NO : 3828W5S2144 Printed in Korea... -
Page 3: Safety Precautions
SAFETY PRECAUTIONS This device is to be serviced only by properly qualified service personnel. Consult the service manual for proper service procedures to assure continued safety operation and for precautions to be taken to avoid possible exposure to excessive microwave energy. PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY... -
Page 4: Table Of Contents
CONTENTS (Page) SAFETY PRECAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Inside front cover SPECIFICATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-1 CAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-1 INSTALLATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-1... -
Page 5: Specifications
SPECIFICATIONS ITEM DESCRIPTION LMH1517CVST MODEL Power Requirement 120 Volts AC 60Hz Single phase, 3 wire grounded Microwave 1,500W Convection 1,500W Combination 1,500W Power Output 1,000W full microwave power(IEC60705) Microwave Frequency 2,450MHz Magnetron 2M246 Timer 0~99min. 99sec. Outside Dimensions 5 /8 “(W) X 14... -
Page 6: Cautions
CAUTIONS Unlike other appliances, the microwave oven is MICROWAVE RADIATION high-voltage and high-current equipment. Personnel should not be exposed to the Though it is free from danger in ordinary use, microwave energy which may radiate from the extreme care should be taken during repair. magnetron or other microwave generating device if it is improperly used or connected. -
Page 7: Installations
INSTALLATIONS BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY. INSTALLING GROUNDING INSTRUCTIONS 1. Empty the microwave oven and clean inside it with For personal safety, this appliance must be fully a soft, damp cloth. Check for damage such as grounded at all times. -
Page 8: Operating Instructions
OPERATING INSTRUCTIONS FEATURES Oven Front Plate Window Door Screen Door Seal Short Metal Rack Display Window Control Panel Glass Tray Safety Interlock Rotating Ring System CONTROL PANEL 1. DISPLAY: The display includes a clock and indicators that tell you time of day, cooking time settings, and cooking functions selected. -
Page 9: Operating Sequence
OPERATING SEQUENCE The following is a description of component functions during oven operation. 9. MORE/LESS 1. SETTING THE CLOCK This pad is to be used as a temperature selection Desired Clear Clock Start/Pause pad in convection mode and cook time adjustment clock pad in the microwave mode. - Page 10 OPERATING SEQUENCE 14. SENSOR TOUCH 18. CONVECTION TO PREHEAT Sensor Cook/ Select Recipe Clear Reheat Categories Select Clear Convection Temperature Clear Popcorn Start/Pause 15. DEFROST AUTO/TIME TO COOK(After preheating) Auto/Time Select Recipe Clear Cooking Time Start/Pause Defrost Categories Enter the 19.
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Page 11: Schematic Diagram
SCHEMATIC DIAGRAM... -
Page 12: Circuit Description
CIRCUIT DESCRIPTION GENERAL DETAILS WHEN THE DOOR IS OPENED DURING COOKING • The low voltage transformer supplies the necessary voltage to the micom controller when power cord is • Both the primary switch and relay 2 cut off the primary plugged in. -
Page 13: 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 14: 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 around the door view otherwise a false reading may result. -
Page 15: Measurement Of Microwave Power Output
MEASUREMENT OF MICROWAVE POWER OUTPUT • Microwave power output measurement is made with the • The microwave power output P in watts is calculated microwave oven supplied at its rated voltage and from the following formula : operated at its maximum microwave power setting with 4187 x (∆T) + 0.88 x (T ) x M a load of (1000±5) g of potable water. -
Page 16: Assembly Removal
D. P.C.B. ASSEMBLY REMOVAL Remove choke cover 1) Remove the control panel assembly from the cavity. (Refer to control panel assembly removal on previous page.) 2) Remove screws which hold the P.C.B. SUB ASS’Y to the control panel. 3) Pull P.C.B. SUB ASS’Y carefully from the control panel. -
Page 17: Magnetron Removal
F. AIR DUCT ASSEMBLY REMOVAL G. MAGNETRON REMOVAL 1) Disconnect the leadwires from the lamp, micro 1) Remove the mounting screw holding the magnetron switch, damper motor, and damper switch. and air duct ass’y. 2) Remove the screws holding the oven cavity and 2) Disconnect the leadwire from the magnetron. -
Page 18: High Voltage Transformer Removal
H. THE TURNTABLE MOTOR I. HIGH VOLTAGE TRANSFORMER REMOVAL REMOVAL 1) Remove the turntable and rotating ring. 1) Discharge the high voltage capacitor. 2) Lay the unit down on its back. 2) Disconnect the leadwires from magnetron, and high 3) Remove the turntable motor cover. voltage capacitor. -
Page 19: Interlock System
L. INTERLOCK SYSTEM M. C-MOTOR, THERMISTOR AND SHEATH HEATER REMOVAL 1) INTERLOCK MECHANISM The door lock mechanism is a device which has 1) Remove back cover after untieing four screws been specially designed to eliminate completely securing the cover assembly to the oven cavity. microwave activity when the door is opened during 2) Disconnect the leadwire from the circulation motor cooking and thus to prevent the danger resulting... -
Page 20: 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-62 OR VP-532A-OF FOR MONITOR SWITCH TYPE NO. SZM-V 16-FA-63 OR VP-533A-OF FOR SECONDARY SWITCH B. -
Page 21: 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 22: High Voltage Capacitor
COMPONENTS TEST PROCEDURE RESULTS Antenna Gasket Chassis Filament 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: Rx10,000) several ohms, and... - Page 23 COMPONENTS TEST PROCEDURE RESULTS Check for continuity of the switch with a FUSE Normal Abnormal Multi-meter. (Wire leads removed.) 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 24 COMPONENTS TEST PROCEDURE RESULTS CIRCULATION MOTOR Measure the resistance. Normal : Approx. 29.5 ohm (Wire leads removed) (Multi-meter scale : R x 1) Abnormal : Infinite or several ohm. TURNTABLE MOTOR Measure the resistance. Normal : Approx. 3.48 Kohm (Wire leads removed) (Ohm-meter scale : R x 1000) Abnormal : Infinite or several ohm.
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Page 25: Trouble Shooting
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 26 (TROUBLE 1) The following visual conditions indicate a probable defective control circuit. 1. Incomplete segments. • Segment missing. • Partial segment missing. • Digit flickering (NOTE: Slight flickering is normal.) 2. Colon does not turn on or blink. 3. A distinct change in the brightness of one or more numbers in display. 4.
- Page 27 (TROUBLE 2) Oven does not operate at all, display window does not display any figures, and no input is accepted. CONDITION CHECK RESULT CAUSE REMEDY Malfunction of the Replace fuse, Check continuity 1. Fuse blows. Continuity. primary, monitor, monitor switch. of monitor secondary switch (with...
- Page 28 (TROUBLE 3) Display shows all figures set, but oven does not start cooking while desired program times are set and START pad is touched. CONDITION CHECK RESULT CAUSE REMEDY Defective Replace 1. Setting time does Check continuity No continuity. secondary switch. secondary switch.
- Page 29 (TROUBLE 5) No microwave oven operation even though oven lamp and fan motor run. (Display operates properly) CONDITION CHECK RESULT CAUSE REMEDY No microwave Defective P.C.B. Replace P.C.B. Disconnect the No continuity. oscillation. assembly. assembly. wire leads from relay 2 and check continuity Continuity.
- Page 30 (TROUBLE 6) Convection oven does not operate at all or convection cook is bad. CONDITION CHECK RESULT CAUSE REMEDY Defective Relay Replace Relay Check the Relay Convection indicator Abnormal 4 or 6. 4 or 6. 4 or 6 of P.C.B. light but oven does assembly .
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Page 31: Exploded View
#EV# EXPLODED VIEW INTRODUCTION MODEL : LMH1517CVST OVEN CAVITY PARTS INTERIOR PARTS DOOR PARTS BASE PARTS LATCH BOARD PARTS CONTROL PANEL PARTS... -
Page 32: Door Parts
#EV# DOOR PARTS 15006A 13581A 13552A 13213A 14890A 13551A WTP013 14026A 14970A 13650A... -
Page 33: Controller Parts
#EV# CONTROLLER PARTS 24781M 268711 23551A WTP018... -
Page 34: Oven Cavity Parts
#EV# OVEN CAVITY PARTS 33112U WTT021 WSZ185 WTT020 WMT002 WNH002 948502 WTT020 WTT011 33052M 35026G 33390G 34370T 35889A 36549S WTP013... -
Page 35: Latch Board Parts
#EV# LATCH BOARD PARTS 43501A 466001 43500A 466003 44510A WSZ085 WTT028 466001 WTP013 53550L 56912B 54810U 36549W 55262A 466001 WTP007 WTT028... -
Page 36: Interior Parts
#EV# INTERIOR PARTS 568772 33808A 56411A WTT022 WTT021 WSZ002 56322A 53504A WTT022 53300G 348102 54810S 348101 34930W 35300S 56549C 55900C 55900N WWP008 WTP015 WNH002 WNH003 50FZZA WSZ059 WWS005 56820A WMT002 343501 WTT037 348103 55290A 34930R WSZ085 54974S 56549F 55900A WSZ185 50CZZH 54810C 56851D... -
Page 37: Base Plate Parts
#EV# BASE PLATE PARTS 56170D 63303A 63302A WTT021 65006B WSZ002... -
Page 38: Sensor Parts
#EV# SENSOR PARTS WTP002 56501A WTT021 35264A 56930M... -
Page 39: Schematic Diagram Of P.c.b
SCHEMATIC DIAGRAM OF P.C.B. -
Page 40: Printed Circuit Board
PRINTED CIRCUIT BOARD...
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