LG MC-783RC Service Manual ▷ View online
Operating Sequence
8
The following is a description of component functions
during oven operation.
during oven operation.
PLUG THE POWER
CORD INTO AN
ELECTRIC OUTLET
CLOCK
SET THE
CORRECT
HOUR
SET THE
CORRECT
MINUTE
CLOCK
STOP/CLEAR
DESIRED
POWER
LEVEL
DESIRED
COOKING
TIME
START
STOP/CLEAR
DESIRED
DEFROST
CATEGORY
DESIRED
COOKING
WEIGHT
START
DESIRED
POWER
LEVEL
DESIRED
COOKING
TIME
DESIRED
POWER
LEVEL
START
DESIRED
COOKING
TIME
Stage 1
Stage 2
GRILL OR
CONVECTION OR
COMBINATION
DESIRED
COOKING
TIME
STOP/CLEAR
DESIRED
COOKING
TIME
START
1. Setting the clock
2. Cooking (MICROWAVE POWER)
3. Multi Stage Cooking
4. Grill Cooking
5. Convection Cooking
STOP/CLEAR
DESIRED
CONVECTION TEMP
(150¡C~200¡C)
START
GRILL
DESIRED
CONVECTION TEMP
(150¡C~250¡C)
GRILL
OR
6. Combination Cooking
START
DESIRED
COOKING
TIME
STOP/CLEAR
DESIRED
CONVECTION TEMP
(150¡C~250¡C)
START
DESIRED
COOKING
TIME
7. Auto Weight Defrost
8. Auto Roast
9. Auto Cook
10. Child Lock
11. Quick Start
12. More and Less
STOP/CLEAR
DESIRED
AUTO ROAST
CATEGORY
DESIRED
COOKING
WEIGHT
START
STOP/CLEAR
DESIRED
COOKING
WEIGHT
START
STOP/CLEAR
STOP/CLEAR
(Touch and Hold)
STOP/CLEAR
STOP/CLEAR
(Touch and Hold)
START
STOP/CLEAR
LESS
START
OR
PROGRAMME
DESIRED
AUTO COOK
STOP/CLEAR
MORE
DESIRED
AUTO COOK
CATEGORY
DESIRED POWER
LEVEL
(20%,40% or 60%)
OR
STOP/CLEAR
COMBINATION
Conditions
Beep sound
¥ Function button touched.
Ñ
¥ Cooking stage changed.
Ñ Ñ
¥ End of cooking
Ñ Ñ Ñ
¥ Error
Ñ Ñ Ñ
¥ Pass by half at auto weight defrost
Ñ Ñ Ñ Ñ Ñ
To Pre - Heat
To Cook
NOTE : Beep Sound
¥ The beep sound is activated under the following
¥ The beep sound is activated under the following
condition.
This oven has a CHILD LOCK feature.
To Set CHILD LOCK
"L" appears on the display and you can't input any key.
To Cancel CHILD LOCK
SCHEMATIC DIAGRAM
9
MICROWAVE
GRILL/CONV. OVEN
GRILL/CONV. OVEN
DIAGRAM SCHEMATIC
PRIMARY
SWITCH
BN
RD
RD
NO
MONITOR
SWITCH
COM
7 6 5 4 3 2 1
OVEN
THERMOSTAT
MAGNETRON
THERMOSTAT
BL
BL
N
L
O.L
F.M
T.T.M
YL
YL
WH
BN
WH
RD
10A
NOISE
FILTER
G - Y
INPUT
POWER
P O W E R
T R A N S
1
2
3
2
3
1 2 3
GN
GN
SECONDARY
SWITCH
PK
WH
WH
MAGNETRON
H.V DIODE
CAPACITOR
H.V
H.V
FUSE
0.8A
RD
RD
RD
F
FA
BL
BL
BL
NC
BN
BL
PK
PK
WH
SOLENOID
YL
BL
WH
RD
RD
RD
TRANSFORMER
RELAY 1
GRILL HEATER
YL
CONVECTION HEATER
RELAY 5
RELAY 2
230VAC
24VAC
COM.
YL
RELAY 4
RELAY 3
YL
WH
YL
RD
THERMISTOR
PCB
ACHTUNG
Hochspannungskondesator vor allen
Servicearbeiten gegen Masse entladen.!!
Servicearbeiten gegen Masse entladen.!!
AVANT INTERVENTION TECHNIQUE, DECONNECTER ET
DECHARGER LA CAPACITE DE HAUT VOLTAGE.
DECHARGER LA CAPACITE DE HAUT VOLTAGE.
B E F O R E S E R V I C N G D i s c h a r g e t h e h i g h v o i t a g e
C a p a c i t o r b y s h o r t i n g t h e n e g a t i v e h i g h v o l t a g e
T e r m i n a l o f i t t o c h a s s i s g r o u n d .
C a p a c i t o r b y s h o r t i n g t h e n e g a t i v e h i g h v o l t a g e
T e r m i n a l o f i t t o c h a s s i s g r o u n d .
*NOTE:DOOR IS CLOSE.
BN:BROWN BL:BLUE YL:YELLOW
RD:RED WH:WHITE PK:PINK
G-Y:GREEN AND YELLOWSTRIPED.
F.M:FAN MOTOR
O.L:OVEN LAMP
T.T.M: TURN TABLE MOTOR
C.M:CIRCULATION MOTOR
RD:RED WH:WHITE PK:PINK
G-Y:GREEN AND YELLOWSTRIPED.
F.M:FAN MOTOR
O.L:OVEN LAMP
T.T.M: TURN TABLE MOTOR
C.M:CIRCULATION MOTOR
C.M
RD
P/NO.3854W3A270A
PRIMARY
SWITCH
BN
RD
RD
NO
MONITOR
SWITCH
COM
7 6 5 4 3 2 1
OVEN
THERMOSTAT
MAGNETRON
THERMOSTAT
BL
BL
N
L
O.L
F.M
T.T.M
YL
YL
WH
BN
WH
RD
10A
NOISE
FILTER
G - Y
INPUT
POWER
P O W E R
T R A N S
1
2
3
2
3
1 2 3
GN
GN
SECONDARY
SWITCH
PK
WH
WH
MAGNETRON
H.V DIODE
CAPACITOR
H.V
H.V
FUSE
0.8A
RD
RD
RD
F
FA
BL
BL
BL
NC
BN
BL
PK
PK
WH
SOLENOID
YL
BL
WH
RD
RD
RD
TRANSFORMER
RELAY 1
GRILL HEATER
YL
CONVECTION HEATER
RELAY 5
RELAY 2
230VAC
24VAC
COM.
YL
RELAY 4
RELAY 3
YL
WH
YL
RD
THERMISTOR
PCB
ACHTUNG
Hochspannungskondesator vor allen
Servicearbeiten gegen Masse entladen.!!
Servicearbeiten gegen Masse entladen.!!
AVANT INTERVENTION TECHNIQUE, DECONNECTER ET
DECHARGER LA CAPACITE DE HAUT VOLTAGE.
DECHARGER LA CAPACITE DE HAUT VOLTAGE.
B E F O R E S E R V I C N G D i s c h a r g e t h e h i g h v o i t a g e
C a p a c i t o r b y s h o r t i n g t h e n e g a t i v e h i g h v o l t a g e
T e r m i n a l o f i t t o c h a s s i s g r o u n d .
C a p a c i t o r b y s h o r t i n g t h e n e g a t i v e h i g h v o l t a g e
T e r m i n a l o f i t t o c h a s s i s g r o u n d .
*NOTE:DOOR IS CLOSE.
BN:BROWN BL:BLUE YL:YELLOW
RD:RED WH:WHITE PK:PINK
G-Y:GREEN AND YELLOWSTRIPED.
F.M:FAN MOTOR
O.L:OVEN LAMP
T.T.M: TURN TABLE MOTOR
C.M:CIRCULATION MOTOR
RD:RED WH:WHITE PK:PINK
G-Y:GREEN AND YELLOWSTRIPED.
F.M:FAN MOTOR
O.L:OVEN LAMP
T.T.M: TURN TABLE MOTOR
C.M:CIRCULATION MOTOR
C.M
RD
P/NO.3854W3A269A
R.M
RD
YL
R.M:ROTISSERIE MOTOR
H.V
H.V
MODEL:MC-783MC
MODEL:MC-783RC
MICROWAVE/GRILL/
CONVECTION OVEN
CONVECTION OVEN
SERVICE MANUAL
MODEL : MC-783MC / MC-783RC
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS
IN THIS MANUAL.
IN THIS MANUAL.
19
COMPONENTS TEST
PROCEDURE RESULTS
HIGH VOLTAGE
CAPACITOR
CAPACITOR
Antenna
Gasket
Filament
Terminals
Terminals
Chassis
Normal : Momentary indicates
several ohms, and
then gradually
returns to infinite.
then gradually
returns to infinite.
Normal :
°
.
NOTE : When testing the magnetron, be sure to install the magnetron gasket in
the correct position and be sure that the gasket is in good condition.
Measure the resistance.
(Multi-meter scale : Rx1000)
(Multi-meter scale : Rx1000)
●
Terminal to termonal.
Measure the resistance.
(Multi-meter scale : Rx1000)
(Multi-meter scale : Rx1000)
●
Terminal to case.
Measure the continuity (Forward).
(Multi-meter scale : Rx10000)
(Multi-meter scale : Rx10000)
Measure the continuity (Reverse).
(Multi-meter scale : Rx10000)
(Multi-meter scale : Rx10000)
Normal :
°
.
Abnormal : Continuity.
Normal : Continuity.
Abnormal :
Abnormal :
°
.
HIGH VOLTAGE
DIODE
DIODE
NOTE :
Some inexpensive
meter may indicate
infinite resistance in
both direction.
Some inexpensive
meter may indicate
infinite resistance in
both direction.
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