LG F50B9LD / F51B9LD Service Manual ▷ View online
2
CONTENTS
1. SPECIFICATION ............................................................................................................................ 3
4
2. FEATURES & TECHNICAL EXPLANATION....................................................................................
3. PARTS IDENTIFICATION ............................................................................................................... 6
7
..
..
..
..
..
..
..
..
...
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
N
O
I
T
A
L
L
A
T
S
N
I
.
4
2
1
..
..
..
..
..
..
..
..
.
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
N
O
I
T
A
R
E
P
O
.
5
2
1
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
)
9
~
1(
P
D
9
B
*
*
F
.
1
-
5
L
..
14
6. WIRING DIAGRAM / PCB LAYOUT / PROGRAM CHART..............................................................
7. TROUBLESHOOTING......................................................................................................................17
7. TROUBLESHOOTING......................................................................................................................17
17
17
17
17
17
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
E
C
I
V
R
E
S
G
N
I
M
R
O
F
E
R
P
E
R
O
F
E
B
.
1
-
7
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
E
D
O
M
T
S
E
T
D
A
O
L
.
2
-
7
7-3. HOW TO KNOW THE WATER LEVEL FREQUENCY
7-3. HOW TO KNOW THE WATER LEVEL FREQUENCY
..............................................................
7-4. ERROR DISPLAY...................................................................................................................... 18
19
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
R
O
R
R
E
H
T
I
W
G
N
I
T
O
O
H
S
E
L
B
U
O
R
T
.
5
-
7
• IE (
9
1
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
)
r
o
r
r
E
t
e
l
n
I
r
e
t
a
W
• UE (Unbalanced Error)
0
2
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
• OE (
1
2
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
)
r
o
r
r
E
t
e
lt
u
O
r
e
t
a
W
• FE (Flow over Error)
3
2
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
24
• PE (Pressure Sensor S/W Error)
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
• DE (Door open Error)
5
2
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
• tE (Thermistor (Heating) Error)
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
26
• LE (Motor Lock Error)
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
27
29
8. TROUBLESHOOTING WITHOUT ERROR CODES
........................................................................
• Vibration & Noise in spin
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
30
31
31
• Detergent & Softener does not flow in
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
.
• Water Leak ............................................................................................................................... 32
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
S
N
O
I
T
C
U
R
T
S
N
I
Y
L
B
M
E
S
S
A
S
I
D
.
9
34
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
..
W
E
I
V
D
E
D
O
L
P
X
E
.
0
1
41
( )
..
.
..
..
...
..
3
1. SPECIFICATION
IMTE
F**96N(L)D(P)(1~9)
POWER SUPPLY
PRODUCT WEIGHT
OPERATION WATER PRESSURE
CONTROL TYPE
WASH CAPACITY
DIMENSION
DOOR SWITCH TYPE
WATER LEVEL
DELAY FINISH TIME
SENSING OF THE LAUNDRY AMOUNT
FUZZY LOGIC
DISPLAY OF THE REMAINING TIME
ERROR DIAGNOSIS
POWER AUTO OFF
CHILD LOCK
AUTO RESTART
ELECTRICITY
CONSUMPTION
WASHING
SPIN (1200rpm)
DRAIN MOTOR
WASH HEATER
REVOLUTION
SPEED
WASH
SPIN
F80**LD(P)(1~9)
F10**LD(P)(1~9)
F12**LD(P)(1~9)
F10**LD(P)(1~9)
F12**LD(P)(1~9)
No Spin~800 rpm
No Spin~1000 rpm
No Spin~1200 rpm
No Spin~1000 rpm
No Spin~1200 rpm
50rpm
0.3-10kgf/cm
2
(30-1000kPa)
Electronic
L_Cotton 5kg (Max.)
600mm(W)x440mm(D)x850mm(H)
9 st eps ( by s ensor)
From 3 hours to 9 hours
Available
Available
Available
Available
Available
Available
Available
Available
10 items
70W
280W
30W
1700W
220-240V~, 50Hz
62kg
Manual Swith type
2-1. FEATURES
Anti Crease function
With the alternate rotation of the drum, creasing in the laundry is
minimized.
More economical by Fuzzy Logic System
FUZZY Logic System detects the amount of load and water
temperature, and then determines the optimum water level and
washing time to minimize energy and water consumption.
Child-Lock
The Child-Lock system has been developed to prevent children
from pressing any button (except Power button) to change the
programme during operation.
Low noise speed control system
By sensing the amount of load and balance, this system
automatically distributes load evenly to minimize the spinning
noise level.
Direct Drive System
The advanced Brushless DC motor rotates the drum directly
without a belt and a pulley.
Built-in heater
temperature on selected cycles.
4
2. FEATURES & TECHNICAL EXPLANATION
5
2-2. DETERMINE WASHING TIME BY FUZZY LOGIC
To get the best washing performance optimal time is determined by sensing of water temperature,
selected washing temperature and laundry amount.
selected washing temperature and laundry amount.
2-3. WATER LEVEL CONTROL
This model uses a pressure sensor to determine the water level in the tub.
When the preset water level reached, water supply is stopped and the program proceeds.
W
When the preset water level reached, water supply is stopped and the program proceeds.
W
ater needs to be below a preset level before spining will proceed.
water
temperature
washing time
rinse time
the best
washing
performance
spin rhythm, time
laundry
amount
FUZZY
LOGIC
selected
washing
temperature
SENSING
EFFECT
PROCESSING
DETERMINATION
2-4. THE DOOR CAN NOT BE OPENED
While program is operating.
While Door Lock light turns on.
While Door Lock light turns on.