DOWNLOAD LG MC-783RC Service Manual ↓ Size: 1.2 MB | Pages: 38 in PDF or view online for FREE

Model
MC-783RC
Pages
38
Size
1.2 MB
Type
PDF
Document
Service Manual
Brand
Device
Microwave Oven
File
mc-783rc.zip
Date

LG MC-783RC Service Manual ▷ View online

TABLE OF CONTENTS
3
(Page)
SAFETY PRECAUTIONS ................................................................................................. Inside front cover
SPECIFICATIONS ........................................................................................................................................ 4
CAUTIONS ................................................................................................................................................... 5
INSTALLATIONS .......................................................................................................................................... 6
OPERATING INSTRUCTIONS ..................................................................................................................... 7
FEATURES .............................................................................................................................................. 7
CONTROL PANEL  ................................................................................................................................... 7
OPERATING SEQUENCE  ....................................................................................................................... 8
SCHEMATIC DIAGRAM  ............................................................................................................................... 9
CIRCUIT DESCRIPTION  ....................................................................................................................... 10
SERVICE INFORMATION ........................................................................................................................... 11
TOOLS AND MEASURING INSTRUMENTS  ......................................................................................... 11
MICROWAVE LEAKAGE TEST  ............................................................................................................. 11
MEASUREMENT OF MICROWAVE POWER OUTPUT ........................................................................ 13
DISASSEMBLY AND ADJUSTMENT ......................................................................................................13
INTERLOCK CONTINUITY TEST .......................................................................................................... 17
COMPONENT TEST PROCEDURE ...................................................................................................... 18
TROUBLE SHOOTING GUIDE .............................................................................................................. 23
EXPLODED VIEW ...................................................................................................................................... 29
MICOM CONTROLLER SCHEMATIC DIAGRAM  ..................................................................................... 37
MICOM CONTROLLER P.C.B LAYOUT .................................................................................................... 38
MICOM CONTROLLER P.C.B PARTS LIST .............................................................................................. 39
PACKING AND ACCESSORIES ............................................................................................................... 41
SPECIFICATIONS
4
ITEM
DESCRIPTION
MODEL
MC-783MC
MC-783RC (FOR ROTISSERIE)
Power Requirement
230V AC50Hz
Single phase, 3 wire grounded
Microwave 1350W
Grill
1250W
Convection
1350W(MAX. 2550W)
Combination
2650W
Power Output
850W full microwave power(IEC705)
Microwave Frequency
2,450MHz
Magnetron
2M214 - 39F, 2M254J, 2M218J
Timer
99min. 90sec.
Control Complement
Microwave Power for Variable Cooking
Power level
HIGH...............................................Full power throughout the cooking time(100%)
MED-HIGH .....................................approx. 80% of Full power
MEDIUM .........................................approx. 60% of Full power
DEFROST ......................................approx. 40% of Full power
LOW ...............................................approx. 20% of Full power
¥ Convection - Max. 250¡C
¥ Grill
¥ Combination
Name plate Location
Accessories
Owner's manual, Cook Book
Glass turntable
Rotating ring
Convection rack
Grill rack
Metal tray
Roti-Bar
Roti-Handle
MC-783RC ONLY
This microwave oven is designed for household use only.
It is not recommended for commercial purpose.
Back Side
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 stop, an electric
charge remains on the high voltage capacitor. When
replacing or checking, you must discharge the
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 damage the door seal or 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 .
5
CAUTIONS
Unlike other appliances, the microwave oven is
high-voltage and high-current appliance.
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.
ANTENNA
GASKET
FILAMENT
TERMINAL
COOLING FIN
MAGNETRON
CHASSIS
GROUND
THE OVEN IS TO BE SERVICED ONLY
BY PROPERLY QUALIFIED SERVICE
PERSONNEL.
MAGNETRON
Installing microwave oven
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.
2. Put the oven on a counter, table or shelf that is
strong enough to hold the oven, food and 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.
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 microwave oven in an ambient temperature
of less than 104¡F (40¡C).
6. Place the microwave oven on a sturdy and flat
surface, at least 10cm(4 inches) from the wall.
7. Place the microwave oven as far away as possible
from TV, RADIO, COMPUTER etc, to prevent
interference.
8. This oven must be plugged into a 15A outlet.
9. Do not touch the front glass during or after cooking
of the Grill, Convection and Combination mode.
This glass is very hot during heater operating.
10. Do not operate oven at microwave and combination
mode with the Convection rack or Grill rack placed 
in the 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.
WARNING-
THIS APPLIANCE 
MUST BE EARTHED
IMPORTANT
As the colours of the wires in the mains lead of this
appliance may not correspond with the coloured
markings identifying the terminals in your plug, proceed
as follows.
The wire which is coloured green-and-yellow must be
connected to the terminal in the plug which is marked
with the letter or by the earth symbol (b
bor coloured
green or green-and yellow.
The wire which is coloured blue must be connected to
the terminal in the plug which is marked with the letter N
or coloured black.
The wire which is coloured brown must be connected to
the terminal in the plug which is marked with the letter L
or coloured red.
6
INSTALLATIONS
BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY.
The wires in this mains lead are coloured in
accordance with the following code:
Green-and-yellow:
Earth
Blue:
Neutral
Brown:
Live
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  • DOWNLOAD LG MC-783RC Service Manual ↓ Size: 1.2 MB | Pages: 38 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the LG MC-783RC in PDF for free, which will help you to disassemble, recover, fix and repair LG MC-783RC Microwave Oven. Information contained in LG MC-783RC Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.