LG SolarDOM MP-9482S Manual de usuario
LIGHT OVEN
“SolarDOM”
SERVICE MANUAL
MODEL: MP-9482S
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Website: http://biz.lgservice.com
P/NO : 3828W5S2190
July,2002
Printed in Korea
삼흥
정판
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
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.
SAFETY PRECAUTIONS
CAUTION
MICROWAVE RADIATION
DO NOT BECOME EXPOSED TO RADIATION FROM THE MICROWAVE ENERATOR
OR OTHER PARTS CONDUCTIN MICROWAVE ENER Y.
(Page)
SAFETY PRECAUTIONS
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Inside front cover
SPECIFICATIONS
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1-1
CAUTIONS
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2-1
INSTALLATIONS
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3-1
OPERATING INSTRUCTIONS
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4-1
FEATURES
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4-1
CONTROL PANEL
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4-1
OPERATIN SEQUENCE
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4-2
SCHEMATIC DIA RAM
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4-3
CIRCUIT DESCRIPTION
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4-4
SERVICE INFORMATION
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5-1
TOOLS AND MEASURIN INSTRUMENTS
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5-1
MICROWAVE LEAKA E TEST
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5-1
MEASUREMENT OF MICROWAVE POWER OUTPUT
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5-3
DISASSEMBLY AND ADJUSTMENT
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5-3
UPPER & LOWER HEATER
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5-7
INTERLOCK CONTINUITY TEST
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5-8
COMPONENT TEST PROCEDURE
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5-9
TROUBLE SHOOTIN
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5-14
EXPLODED VIEW
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6-1
REPLACEMENT PARTS LIST
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7-1
SCHEMATIC DIAGRAM OF P.C.B.
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8-1
PRINTED CIRCUIT BOARD
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8-2
P.C.B. PARTS LIST
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9-1
CONTENTS
This oven is designed for household use only.
It is not recommended for commercial purposes.
DESCRIPTION
MP-9482S
230 Volts AC 50 Hz
Single phase, 3 wire grounded
Microwave 1,650W
rill Max 2,100W
Combination Max 2,800W
Convection 1,900W
900 Watts full microwave power (IEC60705)
2,450 MHz
2M214 - 240 P
0 ~ 90 min.
527 (W) x 392 (H) x 480 (D) mm
440 (W) x 204 (H) x 420 (D) mm
28 kg
31 kg
Owner's manual & Cook book
High rack, Low rack
Metal tray
1-1
ITEM
MODEL
Power Requirement
Power Output
Microwave Frequency
Magnetron
Timer
Outside Dimensions
Cavity Dimensions
Net Weight
Shipping weight
Control Complement
Nameplate Location
Accessories
SPECIFICATIONS
Front Plate
1. Microwave Power level:
MAX (900W), 600W, 360W, 180W, 90W
2. RILL
5. SPEED AUTO COOK
3. Convection: 40°C, 100~250°C
4. SPEED COMBI
Category
rill-1
rill-2
rill-3
Display
gr-1
gr-2
gr-3
Heater operating
Upper heater (2000W)
Upper heater (1100W)
Lower heater (700W)
Display
Co-1
Co-2
Co-3
Co-4
Co-5
Heater + Microwave power selection
rill-1 + 180W, 360W, 600W
rill-2 + 180W, 360W, 600W
rill-3 + 180W, 360W, 600W
(Upper+Lower)+0W, 180W, 360W, 600W
Convection + 180W, 360W, 600W
SC1( ):Frozen Pizza
SC2( ):French Fires
SC3( ):Whole Chicken
SC4( ):Chicken Pieces
SC5( ):Beef Steaks
SC6( ):Roast Pork
SC7( ):Roast Beef
SC8( ):Jacket Potatoes
SC9( ):Frozen Dinners
SC10( ):Fresh Vegetables
SC11( ):Frozen Vegetables
SC12( ):Rice/Pasta
• DO NOT operate on a 2-wire extension cord during
repair and use.
• NEVER TOUCH any oven components or wiring during
operation.
• BEFORE TOUCHIN 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.
• 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 henever
installing the magnetron.
2-1
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.
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
COOLIN FIN
MA NETRON
CHASSIS ROUND
FILAMENT
TERMINALS
MA NETRON
INSTALLATIONS
3-1
INSTALLING
1. Empty the oven and clean inside it with a soft,
damp cloth. Check for damage such as misaligned
door, damage around the door or dents inside the
cavity or on the exterior.
2. Put the oven on a counter, table, or shelf that is
strong enough to hold the oven and the food and
utensils you put in it. (Use care when handling.)
3. Do not block the vent and the air intake openings.
Blocking vent or air intake openings can cause
damage to the oven and poor cooking results.
Make sure the microwave oven legs are in place to
ensure proper air flow.
4. The oven should not be installed in any area where
heat and steam are generated, because they may
damage the electronic or mechanical parts of the
unit.
Do not install the oven next to a conventional
surface unit or above a conventional wall oven.
5. Use the oven in an ambient temperature less than
104°F(40°C).
6. Place the oven on a sturdy and flat surface at least
10 cm(4 inches) from the wall.
7. Place the oven as far away as possible from TV,
RADIO, COMPUTER, etc., to prevent interference.
8. Do not touch the front glass during or after cooking
of the rill and convection and Combination mode.
This glass is very hot during heater operating.
9. Do not operate the oven at microwave and
combination mode with rill rack placed in the
cavity when the oven is empty.
EARTHING INSTRUCTIONS
This oven is designed to be used in a fully earthed
condition.
It is imperative, therefore, to make sure it is properly
earthed before servicing
WARNIN -
THIS APPLIANCE
MUST BE EARTHED
IMPORTANT
As the colors of the wires in the mains lead of this
appliance may not correspond with the colored
markings identifying the terminals in your plug,
proceed as follows.
The wire which is colored green-and-yello must be
connected to the terminal in the plug which is marked
with the letter Eor by the earth symbol ( ) or
colored green or green-and-yello .
The wire which is colored blue must be connected to
the terminal in the plug which is marked with the letter
Nor colored black.
The wire which is colored bro n must be connected
to the terminal in the plug which is marked with the
letter Lor colored red.
BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY.
10cm
The wires in this mains lead are colored in
accordance with the following code:
Green-and-yello : Earth
Blue: Neutral
Bro n: Live
4-1
OPERATING INSTRUCTIONS
FEATURES
CONTROL PANEL
Metal TrayHI H Rack LOW Rack
Oven Front Plate
Safety Door Lock System
Window Door Screen
Door Frame Control Panel
Choke Cover
Control Panel Deco.
3 4 5 6 7 8 1 2 9 10 11 12 13 14
1. Display Window: You can show time of day, cooking time, power
level and cooking categories.
2. Enter: You can determine the selected cooking category,
microwave power level or temperature.
3. Micro: You can select five power level settings.
4. Grill: You can select the grill categories.
5. Conv.: You can select temperature and time of convection.
6. Speed Combi: You can select the combination categories.
7. Speed Auto Cook: Speed auto cook allows you to cook most of
your favorite food quickly by selecting the food type and the
weight of the food.
8. Dial Knob:
• You can set cooking times, temperature, weight and cooking
categories.
• While cooking with auto and manual function, you can lengthen
or shorten the cooking time at any point by turning the dial
knob(except defrost mode).
9. Defrost: You can select the food type and the weight of the food.
10. Favorite: The cooking program can be stored in the memory of
your oven up to 9 modes(FA-1~FA-9).
11. Clock: You can set the time of day.
12. Stop/Clear: You can stop over and clear all entries except time
of day.
• Press Stop/Clear Button one time, all icons will be displayed
on window in time of day or clear mode.
• Press Stop/Clear Button one more time, all icons will be
disappeared.
13. Start/Quick Start:
• In order to start cooking which is selected, press button one
time.
• The quick start feature allows you to set 30 seconds intervals of
HIGH power cooking with a touch of the quick start button.
14. Icon: You can see all icons by pressing “Stop/Clear” button one
time and remove all icons by pressing one more time(all icons
will disappear automatically after 15 seconds).
Blink will guide to next step for setting while cooking, the icon of
the selected cooking mode will be displayed on window.
4-2
OPERATING SEQUENCE
The following is a description of component functions
during oven operation.
1. SETTINGTHE CLOCK
2. MICROWAVE COOKING
3. MULTI STAGE COOKING (MICROWAVE)
4. GRILL COOKING
5. CONVECTION COOKING
To cook
6. SPEED COMBI COOKING
*Speed combi Categories
Grill & Convection & Speed Combi
7. DEFROST
8. SPEED COMBI COOK
9. SPEED AUTO COOK
10. CHILD LOCK
This oven has a CHILD LOCK feature.
To Set CHILD LOCK
To Cancel CHILD LOCK
11. QUICK START
Clock
Turn Dial
Desired
minute Start
Turn Dial
Desired
hour
Stop/
Clear Function
MWO
Stop/Clear
Stop/
Clear
Function
MWO
Turn Dial
Desired
power level Enter
Turn Dial
Desired
cooking time
Start
Stop/
Clear Function
Grill
Turn Dial
Desired
Grill-1,2,3
Desired
cooking
time
Enter
Turn Dial
Desired
cooking time
Start Stop/Clear Stop/Clear
(Touch and Hold)
Stop/Clear Stop/Clear
(Touch and Hold)
Stop/Clear Start/Quick Start
12. FAVORITE (MEMORY COOK)
Stop/Clear
Start
Favorite Any mode Favorite
(FA-1)
Stop/
Clear
Turn Dial
Desired defrost
category
Food
weight
Stop/
Clear
Function
Convection
Turn Dial
Desired convection
temp(40ûC, 100ûC~250ûC)
Enter
Enter Start To set
Favorite
(FA-1)
To cook
Stop/
Clear Function
Combi-4
Turn Dial
Desired
power level
Desired
power
level
Function
MWO
Function
Defrost
Function
Speed
cook
Desired
cooking
time
Start
Turn Dial
Desired
cooking time
Enter
Enter
Stage 1
Stage 2
Desired
cooking
time
Turn Dial
Desired convection
temp(40ûC, 100ûC~250ûC)
Enter Enter
Enter
Start
Start
Stop/
Clear
Turn Dial
Desired speed
cook category
Food
weight Start
Function
Auto
cook
Stop/
Clear
Turn Dial
Desired auto
cook category
Food
weight Start
Desired
power
level
*Grill Categories
Grill-1
(Halogen+Ceramic+Sheather) Upper Heater
Upper Sheath Heater
Lower Sheath Heater
Grill-2
Grill-3
Co-1
Grill-1 + Microwave Power Level
Grill-2 + Microwave Power Level
Grill-3 + Microwave Power Level
Co-2
Co-3
(Upper+Lower Heater) + Microwave Power Level
Co-4
Convection + Microwave Power Level
Co-5
ex)
SCHEMATIC DIAGRAM
4-3
CIRCUIT DESCRIPTION
GENERAL DETAILS
• The low voltage transformer supplies the necessary
voltage to the micom controller when power cord is
plugged in.
• When the door is closed, the primary switch is ON, the
secondary switch is ON, and the monitor switch opens
(contact COM and NO).
WHEN SELECTING COOKING POWER
LEVEL AND TIME
• The micom controller memorizes the function you set.
• The time you set appears in the display window.
• Each indicator light turns on to indicate that the stage
has been set.
WHEN TOUCHING THE START BUTTON
• The coil of the relay is energized by the micom
controller.
• Power input is supplied to the high voltage transformer
through the fuse to the primary switch and relay 4.
• Turntable rotates.
• The fan motor rotates and cools the magnetron by
blowing the air (coming from the intake on the
back cover).
• The air is also directed into the oven to exhaust the
vapor in the oven through the upper plate.
• Cooking time starts counting down.
• 3.2 volts AC is generated from the filament winding of
the high voltage transformer. This 3.2 volts is applied to
the magnetron to heat the magnetron filament through
two noise-preventing choke coils.
• A high voltage of approximately 2100 volts AC is
generated in the secondary of the high voltage
transformer which is increased by the action of the high
voltage diode and charging of the high voltage
capacitor.
• The negative 4,000 Volts DC is applied to the filament
of the magnetron.
WHEN THE OVEN IS SET AT ANY LEVEL
EXCEPT MAXIMUM.
• The micom controller controls the ON-OFF time of
relay 4 by the applied signal to vary the average output
power of oven as POWER LEVEL. (refer to page 1-1)
• One complete cycle of relay 4 is 32 seconds.
WHEN THE DOOR IS OPENED DURING
COOKING
• Both the primary switch and relay 4 are cut off primary
winding voltage of the high voltage transformer.
• ON-OFF of relay 4 is coupled electrically with opening
and closing of the secondary switch.
• When the door is opened, the secondary switch is
opened and when the door is closed, the secondary
switch is closed.
• The cooking time stops counting down.
• Relay stops functioning.
• As the door is opened, if the contact of primary switch
fails to open, the fuse opens due to the large current
surge caused by the monitor switch activation, which in
turn stops magnetron oscillation.
WHEN TOUCHING THE START BUTTON
WITH THE HEATER COOKING
FUNCTION SELECTED
• The contacts of the primary switch and the secondary
switch close the circuit.
• A.C. voltage is applied to the heater through thermostat
as shown by the solid line.
• Turntable rotates.
• The fan motor rotates.
• The air is also directed into the oven to exhaust the
vapor in the oven through the base plate and back
plate.
4-4
L
FUSE
H.V.
TRANS-
FORMER
RELAY 4
MICOM CONTROLLER
SECONDARY
SWITCH
PRIMARY
SWITCH
N
MONITOR
SWITCH
L
FUSE
H.V.
TRANS-
FORMER
RELAY 4
MICOM CONTROLLER
SECONDARY
SWITCH
PRIMARY
SWITCH
N
MONITOR
SWITCH
RELAY 5,6,7
L
N
THERMOSTAT
HEATER
L
-Y
N
E
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