Goldstar MV1615W Manuale utente

MICROWAVE OVEN

SERVICE MANUAL

MODEL : MV1615W

CAUTION

BEFORE SERVICING THE UNIT, READ THE

SAFETY PRECAUTIONS IN THIS MANUAL.

website: http://www.lgservice.com

CAUTION

SAFETY PRECAUTIONS

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 CSA Standard should be

performed on each oven prior to release to the owner.

• Proper operation of the microwave ovens 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.

TABLE OF CONTENTS

(Page)

SAFETY PRECAUTIONS ........................................................................................................ Inside front page

SPECIFICATIONS.......................................................................................................................................... 1-1

CAUTIONS .................................................................................................................................................... 2-1

INSTALLATIONS............................................................................................................................................ 3-1

OPERATING INSTRUCTIONS....................................................................................................................... 4-1

CONTROL PANEL ................................................................................................................................ 4-1

CONTROL PANEL INSTRUCTIONS .................................................................................................... 4-2

OVERALL CIRCUIT DIAGRAM...................................................................................................................... 5-1

SCHEMATIC DIAGRAM......................................................................................................................... 5-1

MATRIX CIRCUIT FOR TOUCH KEY BOARD ..................................................................................... 5-2

GENERAL INFORMATION FOR SERVICE .................................................................................................. 6-1

GENERAL PRECAUTIONS IN USE ..................................................................................................... 6-1

TRIAL OPERATION .............................................................................................................................. 6-1

FEATURES AND SPECIFICATIONS FEATURES................................................................................. 6-1

SERVICE INFORMATION ............................................................................................................................. 7-1

PRECAUTIONS AND REPAIR SERVICE TIPS..................................................................................... 7-1

MICROWAVE LEAKAGE TEST ............................................................................................................ 7-2

POWER OUTPUT MEASUREMENT .................................................................................................... 7-3

DISASSEMBLY INSTRUCTIONS ......................................................................................................... 7-4

INTERLOCK SYSTEM .......................................................................................................................... 7-12

INTERLOCK CONTINUITY TEST.......................................................................................................... 7-14

TEST AND CHECKOUT PROCEDURES AND TROUBLE SHOOTING................................................ 7-15

A. TEST PROCEDURES................................................................................................................ 7-15

B. CHECKOUT PROCEDURES..................................................................................................... 7-18

C. TROUBLE SHOOTING.............................................................................................................. 7-21

EXPLODED VIEW .......................................................................................................................................... 8-1

REPLACEMENT PARTS LIST .............................................................................................................. 8-8

SCHEMATIC DIAGRAM OF PCB ......................................................................................................... 8-10

PRINTED CIRCUIT BOARD ................................................................................................................. 8-11

PCB PARTS LIST................................................................................................................................... 8-12

1-1

SPECIFICATIONS

Rated Power Consumption ....................................

1,500W maximum (Microwave oven+Cook top lamp+Ventilation fan)

Microwave Output .................................................. 1,000W (IEC 60705)

Adjustable 100W through 1000W, 10 steps

Frequency .............................................................. 2,450 MHz ± 50 MHz

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

Rated Current ........................................................ 13 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 Cavity Thermostat:

Open at 90°C±5°C

Fuse(20A)

Primary Interlock Switch

Secondary Interlock Switch

Interlock Monitor

Magnetron ............................................................. 2M214-39F

High Voltage Capacitor ......................................... Capacitor: 1.0µF, 2.1 KV AC

High Voltage ......................................................... Diode Diode; 350mA, 9.0 KV

Cook top Lamp ...................................................... 125 V, 30 W

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

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

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

Overall Dimensions ............................................... 29 15 /16” (W)x16 7 /16” (D)x15 3 /8” (H)

Oven Cavity Size .................................................. 19 7 /8”(W)x14 3 /16”(D)x8 15 /16”(H)

Effective Capacity of Oven Cavity ......................... 1.5 Cu.ft.

Accessories ........................................................... Owner’s Manual & Cooking Guide, Installation Manual,

Exhaust Adapter, Exhaust Damper, Mounting Kit and Two

Filters, Rotating Ring Assembly

2-1

CAUTIONS

• 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.

• For about 30 seconds after the oven stops, an electric

charge remains in the high voltage capacitor. When

replacing or checking, you must discharge the high

voltage capacitor by shorting across the two terminals

with an insulated screwdriver.

• 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 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.

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.

THE OVEN IS TO BE SERVICED ONLY

BY PROPERLY QUALIFIED SERVICE

PERSONNEL.

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 connection.

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.

Gasket

ANTENNA

COOLING FIN

MAGNETRON

CHASSIS GROUND

FILAMENT

TERMINALS

MAGNETRON

3-1

INSTALLATIONS

PRECAUTIONS ON INSTALLATION

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

single-phase power source with a capacity of 15A

or 20A.

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.

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

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.

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.

Plug with Ground

Prong

Properly Polarized

and Grounded

Outlet

4-1

OPERATING INSTRUCTIONS

CONTROL PANEL

4-2

CONTROL PANEL INSTRUCTIONS

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. PIZZA: Touch this pad to reheat 1 to 3 slices.

4. COOK: Touch this pad to cook vegetables, rice, or

casseroles.

5. POTATO: Touch this pad to cook potatoes from 1 to

6. BEVERAGE: Touch this pad to reheat one cup or

two cups a beverage.

7. REHEAT: Touch this pad to reheat dinner plate,

soup/sauce, casserole, roll/muffin.

8. MORE: Touch this pad to add ten seconds of

cooking time each time you press it.

9. CUSTOM COOK: Touch this pad to recall one

cooking instruction previously programmed into

memory.

10. LESS: Touch this pad to subtract ten seconds of

cooking time each time you press.

11. AUTO DEFROST: Meat, poultry, fish. Touch on

pad to select food type and defrost food by weight.

12. EZ ON: Touch this pad to set and start quickly at

100% power level.

13. NUMBER: Touch number pads to enter cooking

time, power level, quantities or weights.

14. CUSTOM SET: Touch this pad to change the

oven’s default settings for sound, clock, display

speed and defrost weight.

15. CLOCK: Touch this pad to enter the time of day.

16. HOLD WARM: Touch this pad to keep hot, cooked

foods safety warm in your microwave oven for up

to 99 minutes 99 seconds.

17. TIME COOK: Touch this pad to set a cooking time.

18. POWER LEVEL: Touch this pad to select a

cooking power level.

19. HELP: Touch this pad to learn how to use each

oven function.

20. STOP/CLEAR: Touch this pad to stop the oven or

clear all entries.

21. START: Touch this pad to start a function. If you

open the door after oven begins to cook, retouch

start.

22. KITCHEN TIMER: Touch this pad to set the

kitchen timer.

23. TURNTABLE ON/OFF: Touch this pad to turn off

the turntable. “OFF”will appear in the display.

24. LIGHT TIMER: Touch this pad to set the light

timer.

25. FAN HI/LOW/OFF: Touch this pad to turn the fan

on or off.

26. LIGHT HI/LOW/OFF: Touch this pad to turn on the

cooktop/countertop light.

5-1

OVERALL CIRCUIT DIAGRAM

SCHEMATIC DIAGRAM

5-2

MATRIX CIRCUIT FOR TOUCH KEY BOARD

TIME

COOK

FAN

HI/LO/OFF

HELP COOK

POPCORN

AUTO

DEFROST

LIGHT

HI/LO/OFF

CUSTOM

SET

REHEAT POTATO

KITCHEN

TIMER

CLOCKLESS Ez On

BEVERAGE

POWER

LEVEL

CUSTOM

COOK

LIGHT

TIMER N.C PIZZA

HOLD

WARM

T/TABLE

ON/OFF

STOP

CLEAR START N.C

N.C N.CMORE N.C N.C N.C N.C

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