LG LMV1762SB Manual de usuario

MICROWAVE OVEN

SERVICE MANUAL

MODEL: LMV1762SB

LMV1762SW

LMV1762ST

LMV1763ST

CAUTION

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL06272540

March, 2016

Printed in Korea

Internal Use Only

-2-

CAUTION

WARNING TO SERVICE TECHNICIANS

PRECAUTIONS TO BE OBSERVED BEFORE AND

DURING SERVICING TO AVOID POSSIBLE EXPOSURE

TO EXCESSIVE MICROWAVE ENERGY

a. Do not operate or allow the oven to be operated with the door open.

b. Make the following safety checks on all ovens to be serviced before activating the

magnetron or other microwave source, and make repairs as necessary; (1) Interlock

operation, (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and

other damage), (4) damage to or loosening of hinges and latches, (5) evidence of

dropping or abuse.

c. Before turning on microwave power for any service test or inspection within the

microwave generating compartments, check the magnetron, wave guide or

transmission line, and cavity for 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 each oven prior to release to the owner.

• Proper operation of the microwave oven requires that the magnetron be assembled to the wave guide and

cavity. Never operate the magnetron unless it is properly installed.

• Be sure that the magnetron gasket is properly installed around the dome of the tube whenever installing the

magnetron.

• Routine service safety procedures should be exercised at all times.

• Untrained personnel should not attempt service without a thorough review of the test procedures and safety

information contained in this manual.

FOREWORD

Read this manual carefully. Failure to adhere to or observe the information in this manual may result in exposing

yourself to the microwave energy normally contained within the oven cavity.

CONTENTS

(Page)

Safety Precautions .............................................................................................................................................. 2

1. Specifications .................................................................................................................................................. 4

2. Cautions ........................................................................................................................................................... 5

3. Installation ....................................................................................................................................................... 6

4. Operation ......................................................................................................................................................... 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 .............................................................................................................................. 24

8. Power Output Measurement......................................................................................................................... 26

9. Interlock System............................................................................................................................................ 27

9-1. Interlock Mechanism ................................................................................................................................ 27

9-2. Interlock Continuity Test ........................................................................................................................... 29

10. Component Testing Information ................................................................................................................ 30

11. Disassembly Instructions ........................................................................................................................... 34

12. Exploded View ............................................................................................................................................. 41

-3-

-4-

1. SPECIFICATIONS

Rated Power Consumption ................................ 1600W maximum

(Microwave oven+Cook top lamps+Ventilation fan)

Microwave Output............................................... 1000W (IEC60705)

Frequency .......................................................... 2450 MHz ±50 MHz

Power Supply .................................................... 120 VAC, 60 Hz

Rated Current .................................................... 14 Amp. (Microwave oven+Cook top lamps+Ventilation fan)

Magnetron Cooling ............................................ Forced Air Cooling

Rectification ....................................................... Rectification Voltage Double Half-Wave

Door Sealing ...................................................... Choke System

Safety Devices ................................................... OVEN TCO 110/0

............................................................................ MGT TCO 150/0

............................................................................ Bottom TCO : 150/0

............................................................................ Fuse (20A)

............................................................................ Primary Interlock Switch

............................................................................ Secondary Interlock Switch

............................................................................ Interlock Monitor Switch

Magnetron ......................................................... 2M214 - 161GP

Cook Top Lamp ................................................. 125 V, 30 W or 40 W

Cavity Lamp ....................................................... 125 V, 30 W or 40 W

Timer ................................................................. Digital, up to 99 min. 99 sec. (in each cooking stage)

Tray ................................................................... Tempered Safety Glass

Overall Dimensions ........................................... 2915/16” (W) x 167/16” (H) x 1615/16” (D)

Oven Cavity Size ............................................... 219/16” (W) x 141/8” (H) x 8 7/8” (D)

Effective Capacity of Oven Cavity ..................... 1.7cu.ft.

Accessories ....................................................... Ownerʼs Manual & Cooking Guide, Installation Manual,

............................................................................ Exhaust Adapter, Exhaust Damper, Mounting Kit and Filter,

............................................................................ Glass Tray, Metal Rack, Rotating Ring Assembly.

SWITCH CHART

SWITCH MODE

CONDITIONS

OPEN OPEN CLOSE

CLOSE CLOSE OPENDOOR CLOSED

PRIMARY

INTERLOCK

SWITCH

SECONDARY

INTERLOCK

SWITCH

INTERLOCK

MONITOR

SWITCH

COM

NOTE: Use the above switch chart with circuit diagram on page 5-1.

DOOR OPEN

-5-

2. CAUTIONS

Unlike other appliances, the microwave oven is

high-voltage and high-current equipment.

Though it is free from danger in ordinary use,

extreme care should be taken during repair.

MICROWAVE RADIATION

Personnel should not be exposed to the

microwave energy which may radiate from the

magnetron or other microwave generating

device if it is improperly used or connected.

All input and output microwave connections,

waveguide, flange, and gasket must be secure.

Never operate the device without a microwave

energy absorbing load attached.

Never look into an open waveguide or antenna

while the device is energized.

• DO NOT operate on a 2-wire extension cord during

repair and use.

• NEVER 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 the

P.C.B.

• NEVER operate the oven with no load.

• NEVER injure the door seal and front plate of the oven

cavity.

• NEVER put iron tools on the magnetron.

• NEVER put anything into the latch hole and the

interlock switches area.

• Proper operation of the microwave oven requires that

the magnetron be assembled to the waveguide and

cavity. Never operate the magnetron unless it is

properly installed.

• Be sure that the magnetron gasket is properly

installed around the dome of the tube whenever

installing the magnetron.

THE OVEN IS TO BE SERVICED ONLY

BY PROPERLY QUALIFIED SERVICE

PERSONNEL.

Gasket

ANTENNA

COOLING FIN

MAGNETRON

CHASSIS GROUND FILAMENT

TERMINALS

MAGNETRON

-6-

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 electric 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.

-7-

4. OPERATION

4-1. Control Panel

-8-

4-2. Explanation of Control Panel

1. DISPLAY. The Display includes a clock and

indicators to tell you time of day, cooking time

settings and cooking functions selected.

2. Popcorn. Touch this pad when popping popcorn

in your microwave oven.

3. Potato. Touch this pad to cook up to 4 potatoes

without entering a cook time or power.

4. Frozen Entree. uch this pad to cook a 10 to 20

ounce (284 to 567 g) frozen entree without

entering a cook time or power.

5. Auto Cook. Tuch this pad to cook microwavable

foods without entering a cook time or power.

6. Soften. Touch this pad to soften butter, icecream,

cream cheese,frozen juice.

7. Melt. Touch this pad to melt butter or

margarine, chocolate,cheese,marshmallow.

8. Time. Touch this pad followed by number pads to

set a cooking time.

9. NUMBER- Touch number pads to enter cooking

time, power level, quantities or weights.

10. Less. Touch this pad to subtract ten seconds of

cooking time each time you press it.

11. Light On/Off. Touch this pad to turn the cooktop/

countertop light on or off.

12. Pizza. Touch this pad to reheat one or several

slices of pizza without entering a cook time or

power.

13. Auto Reheat. Touch this pad to reheat

microwavable foods without entering a cook time

or power.

14. Time Defrost. Touch this pad to set a defrost

time.

15. Auto Defrost. Touch this pad followed by

number pads to thaw frozen meat by weight.

16. Power Level. Touch this pad to select a cooking

power level.

17. Clock. Touch this pad to enter the time of day.

18. START Enter. Touch this pad to start a function.

If you open the door after oven begins to cook,

retouch START Enter.

19. STOP Clear. Touch this pad to stop the oven or

clear all entries.

20. Energy Saving. Touch this pad to save energy.

21. More. Touch this pad to add ten seconds of

cooking time each time you press it.

22. Add 30 Sec. Touch this pad to add 30 seconds

of cooking time each time you press it.

23. Vent Hi/Low/Off. Touch this pad to turn the Vent

on or off.

NOTE: If you try to enter incorrect instructions,

you will not hear any tones. Touch STOP Clear and

re-enter the instructions.

-9-

5. WIRING DIAGRAM / KEY MATRIX

5-1. Wiring Diagram

RY8

C/T Lamp

RY9

Vent Slow

RY3

Vent High

RY4

Vent Low

FUSE

SR5

SMPS

SECONDARY

SWITCH

BOTTOM

DIODE

H.V.FUSE

H.V.CAPACITOR

H.V.TRANSFORMER

MONITOR SWITCH

RY2

POWER

RY1

Oven Lamp

MGT

BK BL WH PK BR GY

-10-

5-2. Key Matrix

KEY MATRIX

Turntable On/Off

Power LevelTime CookHold WarmC/T Lamp On/OffStart

MoreSensor Cook

time & weight

Defrost

N.AN.A

N.A

Sensor Popcorn

LessSensor ReheatTimer

987

Melt

654

321

SoftenQuick DefrostAdd 30 Sec.Energy SavingClockVent Hi/Low/OffClear

76543212st

KEY MATRIX

Este manual sirve para los siguientes modelos

Tabla de contenidos

Manuales populares de Microondas de otras marcas

Daewoo

Daewoo KOG-574R0S Manual de usuario

Sharp

Sharp R-895(AL)M Manual de usuario

Dometic

Dometic DOTRM13W Manual de usuario

Sanyo

Sanyo EM-X680 Manual de usuario

Sharp

Sharp R-393M Manual de usuario

KitchenAid

KitchenAid KMCX4510 Instrucciones de instalación

Smeg

Smeg S45MCX1 Manual de usuario

Russell Hobbs

Russell Hobbs RHM2044 Manual de usuario

Sunbeam

Sunbeam SMW759 Manual de usuario

Gallet

Gallet FMOE230S Manual de usuario

Bosch

Bosch CEG732X.1B Manual de usuario

Dometic

Dometic Roadmate 230 Manual de usuario

Samsung

Samsung SJ0396W Manual de usuario

Sanyo

Sanyo EM-P494WS Manual de usuario

Sharp

Sharp R-240 Manual de usuario

Electrolux

Electrolux EMS2840 Manual de usuario

Daewoo

Daewoo KOC-984T2S13 Manual de usuario

Impecca

Impecca CM07M2 Manual de usuario