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3. INSTALLATION

BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY.

PRECAUTIONS ON INSTALLATION

A. Plug the power supply cord into a 120V AC, 60Hz,

single-phase power source with a capacity of at
least 20 amperes.

B. Avoid placing the unit in a location where there is

direct heat or splashing water.

C. Install the unit on the mounting plate firmly.
D. Place the unit as far away as possible from TV,

radio, etc. to prevent interference.

GROUNDING INSTRUCTIONS

For personal safety, this appliance must be fully
grounded at all times.

In the event of an electrical short circuit, grounding
reduces the risk of electrical shock.
The plug must be plugged into an outlet that is
properly installed and grounded.

CAUTION

This unit is equipped with a 3-prong plug for your
safety.If the wall outlet is a grounded 3-hole type,
the unit will be grounded automatically.

WARNING

Improper use of the grounding plug can result in a
risk of electric shock.
Do not, under any circumstances, cut or remove the
third ground prong from the power cord plug.

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Содержание LMV1813SB

Страница 1: ...SERVICE MANUAL MODEL LMV1813SW LMV1813SB LMV1813ST CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL Website http biz lgservice com P NO MFL06272514 February 2010 Printed in China Internal Use Only ...

Страница 2: ... proper alignment integrity and connections d Any defective or misadjusted components in the interlock monitor door seal and microwave generation and transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is released to the owner e A Microwave leakage check to verify compliance with the Federal performance standard should be performed on ...

Страница 3: ...n 7 4 1 Control Panel Features 7 4 2 Explanation of Control Panel 8 5 Wiring Diagram Key Matrix 9 5 1 Wiring Diagram 9 5 2 Key Matrix 10 6 Troubleshooting 11 6 1 General Information for Service 11 6 2 Safety Caution 12 6 3 Basic Check Summary 13 6 4 Troubleshooting 14 7 Microwave Leakage Test 25 8 Power Output Measurement 27 9 Interlock System 28 9 1 Interlock Mechanism 28 9 2 Interlock Continuity...

Страница 4: ...Switch Interlock Monitor Switch Magnetron 2M246 LG Cook top Lamp 125V 30W Incandescent Warming Lamp 125V 30W Timer Digital up to 99 min in each cooking stage Tray Tempered Safety Glass Overall Dimensions 2915 16 W x 167 16 H x 155 8 D Oven Cavity Size 216 8 W x 105 8 H x 145 8 D Effective Capacity of Oven Cavity 1 8 Cu ft Accessories Owner s Manual Cooking Guide Installation Manual Exhaust Adapter...

Страница 5: ... TOUCH any oven components or wiring during operation BEFORE TOUCHING any parts of the oven always remove the power plug from the outlet Remove your watches whenever working close to or replacing the magnetron DO NOT touch any parts of the control panel circuit A resulting static electric discharge may damage this P C B NEVER operate the oven with no load NEVER injure the door seal and front plate...

Страница 6: ...io etc to prevent interference GROUNDING INSTRUCTIONS For personal safety this appliance must be fully grounded at all times In the event of an electrical short circuit grounding reduces the risk of electrical shock The plug must be plugged into an outlet that is properly installed and grounded CAUTION This unit is equipped with a 3 prong plug for your safety If the wall outlet is a grounded 3 hol...

Страница 7: ... 7 4 OPERATION Control Panel Features 1 2 5 3 9 8 10 12 13 16 20 14 21 22 25 19 4 6 11 15 17 18 23 26 24 7 ...

Страница 8: ...n s default setting for sound clock disply speed and defrost weight 12 CUSTOM COOK Touch this pad to recall one cooking instruction previously programmed into memory 13 DEFROST Touch this key to defrost food by entering weight cook time or Quickly Touch this key 2 times to Quick Defrost Cook Touch this key 3 times to Time Defrost Cook 14 SOFTEN Touch this pad to soften Butter Ice Cream Cream Chees...

Страница 9: ...5 WIRING DIAGRAM KEY MATRIX 9 5 1 Wiring Diagram ...

Страница 10: ... Vent On Off TURBO Vent Speed MAC CHEESE STOP CLEAR LIGHT SOFTEN DEFROST Auto Defrost EZ ON ADD30SEC CHICKEN NUGGETS HOT DOG MELT MORE LESS TIME COOK SENSOR POPCORN SENSOR COOK SENSOR REHEAT POWER LEVEL WARMING Hold Warm T TABLE ON OFF ENTER START AUTO Time Set Timer CLOCK NA NA NA NA NA KEY MATRIX ...

Страница 11: ...ake sure the cavity light comes on The unit will begin cooking and the display window will show the time counting down by seconds D After about 5 minutes make sure the primary interlock switch the secondary interlock switch and the interlock monitor switch operate properly by opening and closing the door several times Press the Press the START pad each time the door is closed E Continue operating ...

Страница 12: ...imit of 5 mW cm2 All service adjustments should be made for minimum microwave energy leakage readings 3 Do not operate the unit until it is completely repaired if any of the following conditions exist The unit must not be operated a The door does not close firmly b The hinge is broken c The door seal is damaged d The door is bent or warped or there is any other visible damage on the unit that may ...

Страница 13: ... Symptom 1 Door is closed No cook Operate F M S M T T M automatically Check Open Short when the door is closed Switch Symptom 2 Door is open Not operate F M S M T T M Check Open Short when the door is open Switch Symptom 1 Door is closed No key Not start Operating O L F M S M T T M Check Open Short when the door is closed Switch Symptom 2 Door is open Not turn on O L Check Open Short when the door...

Страница 14: ... 14 6 4 Troubleshooting No Display or Dead ...

Страница 15: ...t between the power code and connector Code L to Pin3 Code N to Pin5 No Yes Check PCB Go to No 8 of this flow chart Go to No 8 of this flow chart 4 Is there any beep sound in continuity test between the ends of thermostats Oven Magnetron Yes No Replace the thermostats 5 Is there any beep sound in continuity test between the ends of the Fuse Yes No Replace the Fuse L L L L L L L L L L L L L L L L L...

Страница 16: ... there any beep sound in continuity test between the ends of noise filter Neutral terminal of Noise filter Live terminal of Noise filter No No Reconnect or repair the connector Replace the Main PCB EBR64419603 ...

Страница 17: ... 17 Keypad Failure MICOM Start key or EZ ON key works if the door is closed ...

Страница 18: ... No Adjust latch board Refer to 9 1 9 2 Check PWB Go to No 5 of this flow chart 3 When the door is opened Is the voltage of door sensing part over 4V Pin 1 to Pin 3 of CN4 Yes No Replace the PCB EBR64419603 5 4 4 Is the connector connected to MAIN PCB assembly disconnected or disassembled CN3 No Yes Reconnect or repair the connector Replace the PCB EBR64419603 Replace the Keypad if changing the PC...

Страница 19: ... 19 No Heat No Cook ...

Страница 20: ...On No Yes PCB No Problem Alternate with explanation Refer to the Note Is the connector connected to Power PCB and MAIN PCB assembly disconnected or disassembled CN6 CN7 Yes Reconnect or repair the connector No Replace the PCB EBR64419603 Note If something is caught in the door or in the sealing area the microwave oven cannot operate safely The latch switches and monitor switch will prevent operati...

Страница 21: ...condary 50 120 Ohm 3 Filament winding 0 Ohm No Yes Replace the High Voltage Transformer 6 Is the connector connected to High voltage Transformer assembly disconnected or disassembled No Yes Reconnect or repair the connector Case ground Case ground Case ground Case ground Case ground Case ground Case ground Case ground Case ground Case ground Case ground Case ground Case ground Case ground Case gro...

Страница 22: ...age diode assembly disconnected or disassembled No Yes Reconnect or repair the connector 12 Is the connector connected to magnetron assembly disconnected or disassembled Yes 11 Is the resistance of the high voltage diode out of rage Refer to 10 Yes No Replace the high voltage Diode F o r w a r d F o r w a r d F o r w a r d F o r w a r d F o r w a r d F o r w a r d F o r w a r d F o r w a r d F o r...

Страница 23: ...n button is pressed Does the turntable motor operate No No Yes 3 When door is closed does the oven lamp turn on No Yes Adjust the Primary latch board Refer to 9 1 9 2 Power ON 4 Push the EZ ON Operate Is the voltage of both ends of the D30 over 8 V No Replace the PCB EBR64419603 ...

Страница 24: ...any beep sound in continuity test between the ends of latch board secondary switch Door should be closed Yes No Adjust the Primary latch board Refer to 9 1 9 2 Power ON 4 When the door is opened Is the voltage of door sensing part over 4V Pin 1 to Pin 3 of CN4 Yes No Replace the PCB EBR64419603 6 Is there any beep sound in continuity test between the ends of two Pin Pin 1 of CN3 and Pin 5 of CN1 N...

Страница 25: ... servicing The power density of the microwave radiation leakage emitted by the microwave oven should not exceed 1mW cm sq And always start measuring of an unknown field to assure safety for operating personnel from radiation leakage NOTE The standard is 5mW cm sq while in the customer s home 1mW cm sq stated here is manufacturer s own voluntary standard for units in customer s home EQUIPMENT TESTE...

Страница 26: ... exceed meter full scale deflection 2 The test probe must be removed no faster than 1 inch sec 2 5cm sec along the shaded area otherwise a false reading may result 3 The test probe must be held with the grip portion of the handle A false reading may result if the operator s hand is between the handle and the probe 4 When testing near a corner of the door keep the probe perpendicular to the surface...

Страница 27: ...e T of 10 1 K is measured where t is the time in seconds and T is the temperature rise The initial and final water temperatures are selected so that the maximum difference between the final water temperature and the ambient temperature is 5 K 6 The microwave power output P in watts is calculated from the following formula 4 187 Mw T2 T1 0 55Mc T2 T0 t is measured while the microwave generator is o...

Страница 28: ...is removed 1 Set the microwave oven on its side so that you can see the latch board and the switches as shown inFigure 23 a 2 Close the door tightly and check gaps A and B to be sure they are no more than 1 64 0 5 mm See Figure 23 b for close up view of gaps A and B door latches If all gaps are less than 1 64 0 5 mm adjustment of the latch board may not be necessary Go to Steps 5 and 6 to check th...

Страница 29: ...ro 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 prope...

Страница 30: ... indicate an closed circuit When the secondary switch operation is abnormal make the necessary adjustment or replace the switch only with the same type of switch C MONITOR SWITCH TEST Disconnect the wire lead from the monitor switch Connect the ohmmeter leads to the common COM and normally closed NC terminals of the switch The meter should indicate closed circuit in the door open condition When th...

Страница 31: ... wire leads 2 Measure resistance ohm meter scale Rx1 Primary winding Secondary winding Filament winding 3 Measure resistance ohm meter scale Rx1000 Primary winding to ground Filament winding to ground 1 Remove wire leads Install the magnetron seal in the correct position Check that the seal is in good condition 2 Measure resistance ohm meter scale Rx1 Filament terminal 3 Measure resistance ohm met...

Страница 32: ...scale Rx1000 CAPACITOR DIODE Some inexpensive ohm meters may indicate infinite resistance in both directions 1 Measure continuity ohm meter scale Rx1 2 Remove the lead wires and operate oven at power level 1 through power level 10 RELAY 2 1 Remove wire leads 2 Measure resistance ohm meter scale Rx1 Normal Approximately Terminal 35 to 50 ohms Terminal 5 to 15 ohms Abnormal Infinite or several FAN M...

Страница 33: ...d wires 2 Measure resistance ohm meter scale Rx1 Turbo speed blue black wire High speed blue white wire Low speed blue gray wire 1 Remove wire leads 2 Measure resistance ohm meter scale Rx1000 VENTILATION MOTOR TURNTABLE MOTOR 1 Disconnect sensor connector from micom computer board 2 Measure resistance terminal to terminal ohm meter scale R X 1000 ABSOLUTE HUMIDITY SENSOR 1 Remove lead wires 2 Mea...

Страница 34: ... plastic fastener MATRIX CIRCUIT FOR TOUCH KEY BOARD CONNECTOR KEY CON TOUCH KEY BOARD Resistance value When touched Less than 400 ohms When not touched More than 1 megohm FPC CONNECTOR Top NOTES A MICROWAVE ENERGY TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON MAKE SURE THE WIRE LEADS ARE IN THE CORRECT POSITION WHEN REMOVING THE WIRE LEADS FROM THE PARTS BE SURE TO GRASP ...

Страница 35: ...R AND CONTROL CIRCUIT BOARD Figures 1 2 and 3 1 Remove a screw securing the control panel assembly to the oven cavity 2 Remove the control panel with pushing it upward 3 Remove the connectors CN1 CN2 CN3 CN4 CN6 CN9 and wire leads RY2 RY3 from the circuit board 4 Remove 6 screws securing the circuit board Power Transformer Control Panel Screw Circuit Board CN4 CN6 CN9 RY2 CN3 CN2 CN1 Circuit Board...

Страница 36: ... INSERT THE F P C CONNECTOR Follow the steps below as illustrated in Figures 6 and 7 to insert the F P C connector 1 Insert the F P C connector into the terminal socket securely with the fingers 2 Hold the plastic fastener with thumb and forefinger of the other hand and push it slowly into the terminal socket Figure 6 NOTE When reconnecting the F P C connector make sure that the holes on the F P C...

Страница 37: ... turning the screws 1 or 2 screws securing it to the outer case 4 Remove two screws on the left central edge and two screws on the right central edge of the base plate Remove the fan bracket from the outer case by removing one screw securing it to the outer case 5 Remove four screws of the rear cavity 6 Remove the outcase with disconnecting power cord connector Fan Bracket Power Cord Figure 8 ...

Страница 38: ... interlock switches 2 Remove two screws securing the Latch Board 3 Make necessary replacements and check microwave energy leakage according to ADJUSTMENT PROCEDURES on page 28 WIRE COLOR SYMBOL COLOR WH WHITE BK BLACK BN BROWN RD RED YL YELLOW PK PINK BL BLUE GY GREY GN GREEN N P Not Provided ...

Страница 39: ...tion and be sure that the gasket is in good condition After replacing the magnetron check for microwave energy leakage with a survey meter Check microwave energy leakage must be below the limit of 5 mW cm2 All service adjustments should be made for minimum microwave energy leakage readings E REMOVING STIRRER FAN Figures 13 and 14 1 Remove one rivet assembly securing it to the oven upper plate by u...

Страница 40: ...screw driver etc 2 Remove two screws securing it to the door handle CAUTION Be careful not to damage door seal plate with the screwdriver H ASSEMBLING DOOR 1 When mounting the door assembly to the oven assembly be sure to adjust the door assembly parallel to the chassis Also adjust so the door has no play between the inner door surface and oven frame assembly If the door assembly is not mounted pr...

Страница 41: ... VERY CAREFULLY with a hand Figure 19 3 Remove the base plate by removing 8 screws securing it to the oven cavity Figure 20 4 Disconnect the leadwire from the turntable motor terminals 5 Remove the 2 screw securing the turntable motor to the oven cavity assembly Figure 21 NOTES Remove the leadwire from the turntable motor VERY CAREFULLY Be sure to grasp the connector not the wires when removing ...

Страница 42: ...REPLACING THE HUMIDITY SENSOR 1 Remove the sensor by removing two screws in front of the lamp cover removing one screw securing it to the air duct See Figure 22 2 Mount the new humidity sensor to the air duct ...

Страница 43: ...12 EXPLODED VIEW 43 DOOR PARTS I 1005 1384 1009 1006 1007 1011 1000 1004 W109 W109 W136 1002 EV FOR MODELS ...

Страница 44: ... 45 CONTROLLER PARTS I CONTROLLER PARTS I 2000 2004 2002 2008 W130 W130 2006 MBM2 EV FOR MODELS ...

Страница 45: ...EN CAVITY PARTS I 3031 3061 3010 3036 3048 3001 W109 W109 W142 W138 W142 W138 5063 3034 For Model For Model W142 W138 3024 6001 5015 5015 3032 3032 6000 3005 W107 3026 3025 5036 5038 3025 5036 5038 FOR MODELS ...

Страница 46: ... 49 LATCH BOARD PARTS W102 4000 4002 4003 4001 4004 4002 EV ...

Страница 47: ... I W109 W109 W109 W109 W105 W109 W265 W101 W110 3008 3012 3002 W101 W140 W248 5024 5058 5043 5044 3004 5144 5000 5018 5049 5069 5007 5216 5412 5010 5073 5012 5041 5001 5075 5002 5035 5008 5009 5030 5116 W281 W105 3009 EV ...

Страница 48: ...INTERIOR PARTS II 3027 5011 5460 5006 5037 3047 5014 5015 5038 W109 W109 W109 W107 5074 5206 5117 51 ...

Страница 49: ... 52 INSTALLATION PARTS USE CARE 6009 6008 MFL1 MEZ1 COOKING GUIDE LABEL MFL3 INSTALLATION MANUAL MBM4 UPPER TEMPLATE MBM5 WALL TEMPLATE 6010 6011 EV ...

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