LG MB-4342W Service Manual ▷ View online
• 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.
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
• 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
• 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.
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.
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.
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.
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.
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
CHASSIS GROUND
FILAMENT
TERMINALS
TERMINALS
MAGNETRON
INSTALLATIONS
3-1
INSTALLING
1. Empty the microwave 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.
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. (The control panel side of the
oven is the heavy side. Use care when handling.)
utensils you put in it. (The control panel side of the
oven is the heavy side. 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.
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.
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 microwave oven in an ambient temperature
less than 104°F(40°C).
6. Place the microwave oven on a sturdy and flat
surface at least 10 cm(4 inches) from the wall.
7. Place the microwave oven as far away as possible
from TV, RADIO, COMPUTER, etc., to prevent
interference.
interference.
8. Do not touch the front glass during or after cooking
of the Grill and Combination mode.
This glass is very hot during heater operating.
This glass is very hot during heater operating.
9. Do not operate the oven at microwave and
combination mode with Grill rack placed in the
cavity when the oven is empty.
cavity when the oven is empty.
EARTHING INSTRUCTIONS
This microwave oven is designed to be used in a fully
earthed condition.
It is imperative, therefore, to make sure it is properly
earthed before servicing
earthed condition.
It is imperative, therefore, to make sure it is properly
earthed before servicing
WARNING-
THIS APPLIANCE
MUST BE EARTHED
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.
appliance may not correspond with the colored
markings identifying the terminals in your plug,
proceed as follows.
The wire which is colored green-and-yellow must be
connected to the terminal in the plug which is marked
with the letter E or by the earth symbol ( ) or
colored green or green-and-yellow.
connected to the terminal in the plug which is marked
with the letter E or by the earth symbol ( ) or
colored green or green-and-yellow.
The wire which is colored blue must be connected to
the terminal in the plug which is marked with the letter
N or colored black.
the terminal in the plug which is marked with the letter
N or colored black.
The wire which is colored brown must be connected
to the terminal in the plug which is marked with the
letter L or colored red.
to the terminal in the plug which is marked with the
letter L or 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:
accordance with the following code:
Green-and-yellow:
Earth
Blue:
Neutral
Brown:
Live
4-1
OPERATING INSTRUCTIONS
FEATURES
CONTROL PANEL
Oven Front Plate
Door Seal
Control Panel
Safety Door Lock System
Window Door Screen
Grill Rack
Rotating Ring
Turntable
6
5
3
4
7
1
10
13
2
12
11
9
8
1. INDICATORS
2. SET CLOCK: Used to set the time of day.
3. MICRO: Used to select the desired power level
for microwave cooking.
4. GRILL: Used to select the grill cooking.
5. AUTO DEFROST: Used to select the auto weight
defrost.
6. RUSSIAN COOK: Used to cook the foods listed by
one touch.
7. TIME: To set cooking times.
8. STOP/CLEAR: Used to stop oven and clear all
entries except time of day.
CHILD LOCK
CHILD LOCK
9. DISPLAY WINDOW
10. COMBI: Used to select the combination cooking.
11. MORE/LESS: Used to change cooking time.
WEIGHT: Used to select the weight of food.
12. START: One tap allows oven to begin functioning.
13. QUICK DEFROST: Used to defrost quickly.
4-2
OPERATING SEQUENCE
The following is a description of component functions
during oven operation.
during oven operation.
1. SETTING THE CLOCK
NOTE: You can set 12 hour clock or 24 hour clock
optionally.
2. CANCEL FUNCTION
Touch the pad whenever you need to
cancel an entry or a function currently in use.
The display will either return to the last item entered
or to the clock.
3. QUICK START
4. MICROWAVE COOKING
5. MULTI-STAGE MICROWAVE
COOKING
6. GRILL COOKING
7. COMBINATION COOKING
8. AUTO WEIGHT DEFROST
9. CHILD LOCK
This oven has a CHILD LOCK feature
• TO SET CHILD LOCK
• Touch the pad
• Touch STOP pad L appear in
the display.
•TO CANCEL CHILD LOCK
• Touch the pad
• Touch STOP pad L disappears.
10. RUSSIAN COOK
Stop
Set
clock
Set the
correct hour
Set the
correct minute
Stop
Start
STOP
STAGE 1
Touch
start
Stop
Start
Stop
Grill
Desired
cooking Time
Start
Stop
Desired
combi
category
Desired
cooking Time
Start
Stop
Desired
defrost
category
Desired
cooking
cooking
Weight
Start
Stop
Desired
russian cook
category
Desired
cooking
cooking
Weight
Start
Touch
start
Stop
Desired
power level
Desired
cooking time
Start
STAGE 2
Stop
Stop
Desired
power level
Desired
cooking time
Desired
power level
Desired
cooking time
Grill
or Combi
Desired
cooking time
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