LG GR-403SVQF Service Manual ▷ View online
CIRCUIT DIAGRAM
NOTE : THE PLUG TYPE ON CIRCUIT DIRGRAM IS SUBJECT
TO CHANGE IN DIFFERENT LOCALITIES.
TO CHANGE IN DIFFERENT LOCALITIES.
WH : WHITE BL : BLUE RD : RED BN : BROWN
PR : PURPLE YL : YELLOW PK : PINK SB : SKY BLUE
GY : GRAY GN : GREEN BK : BLACK BO : BRIGHT ORANGE
3854JD1012A
C
N
N
L
M
3
6
5
S
M
C
RY1
RY2
YL
BL
BL
BK
BK
PR
WH
BK
GN/YL
BK
BK
BK
RD
BN
CON1
CON2
CON4
BL BL BO BO
CON3
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
1 2 3
5 4 3 2 1
1 2 3 4
BK
BN
RD BO YL GN BL PR GY WH
BK
BN
RD BO YL GN BL PR GY WH
YL
YL
BL
BL
BL
BN
BK
FUSE
-
M
(77 C)
OVER LOAD
PROTECTOR
COMP-
RESSOR
POWER SUPPLY
CORD
R-LAMP
F-SENSOR
DEF-SENSOR
DOOR S/W-R
FAN MOTOR
L-CORD
TE-PLATE
MAIN CONTROL P.C.B
DISPLAY CONTROL P.C.B
(1) SELF TEST
(2) FUNCTION TEST
1) FUNCTION TEST is useful to check the connection of wires, COMPRESSOR and DEFROST SYSTEM.
2) FUNCTION TEST is started with the push of TEST KEY on MAIN PCB.
3) FUNCTION TEST is released and goes to RESET state automatically after 2 hours if the TEST KEY
is not pushed any more.
FUNCTION TEST METHOD
•
NOTICE BEFORE TESTING : 1) If there is any ERROR during power-on state,
ERROR CODE is displayed with DISPLAY LEDs
on freezer door, the other LEDs are all off and
DISPLAY SWITCH don't work.
on freezer door, the other LEDs are all off and
DISPLAY SWITCH don't work.
2) Be sure to RESET power after ERROR CHECK
and TEST MODE.
: ON
: OFF
NO ERROR STATE
ERROR CODE LEDs
METHOD OF ERROR DETECTION
REMARK
F1
F2
F3
1
2
3
F-SENSOR
ERROR
ERROR
DEFROST SENSOR
ERROR
ERROR
DEFROST ERROR
FREEZER SENSOR LEAD WIRE OPEN OR
SHORT
SHORT
DEFROST SENSOR LEAD WIRE OPEN OR
SHORT
SHORT
WHEN THE TEMPERATURE OF DEFROST
SENSOR IS BELOW 13˚C AFTER 2 HOURS
FROM DEFROSTING
SENSOR IS BELOW 13˚C AFTER 2 HOURS
FROM DEFROSTING
CHECK THE
CONNECTIONS OF
EACH WIRE OF
SENSOR
CONNECTIONS OF
EACH WIRE OF
SENSOR
TEMPERATURE
FUSE ERROR OR
DEFROST ITSELF IS
OUT OF ORDER
FUSE ERROR OR
DEFROST ITSELF IS
OUT OF ORDER
MODE
MANIPULATION
COMPRESSOR, FAN
DEFROST HEATER
DISPLAY LED
TEST 1
PUSH TEST KEY
OPERATE REGARDLESS
OFF
AII ON
1 TIMES OF TEMPERATURE
TEST 2
PUSH TEST KEY
OFF
ON IF DEF - SENSOR
ONLY "FUZZY" LED ON
1 TIMES IN TEST 1
IS BELOW 13˚C
RESET
PUSH TEST KEY • IF DEF - SENSOR TEMPERATURE IS OVER 13˚C IN TEST 2, IT GOES TO INITIAL RESET,
1 TIMES IN TEST 2 • WHEN IT RETURNS TO INITIAL RESET. COMPRESSOR OPERATES AFTER 7 MINUTES.
COLDER
F1
F2
F3
COLD
3-1 DOOR
●
Freezer Door
1. Loosen 3 hexagonal bolts fixed to the upper hinge and
lift the door to remove the freezer door only. (Figure 6)
2. Loosen screws within the Door Gasket to remove the
Door Liner and the Door Gasket. (Figure 7)
●
Chilled Room Door
1. Loosen 2 screws holding the Hinge-C assembly to
remove the Chilled Room Door only. (Figure 8)
2. Remove the Door Liner and the Door Gasket by
loosening screws within the Door Gasket.
●
Refrigerator Door
1. Loosen 3 hexagonal bolts fixed to the hinge lower-W to
remove the door only. (Figure 8)
2. Lossen screws within the Door Gasket to remove the
Door Liner and the Door Gasket.
3-2 DOOR SWITCH
To remove the Door Switch, pull it out by inserting a
(–) driver in the bottom of the switch and separate the Lead
Wire. (Figure 10)
(–) driver in the bottom of the switch and separate the Lead
Wire. (Figure 10)
3-3 THERMISTOR
Main function of the Thermistor is to control the
temperature of freezer.
1. Remove all shelves placed in the freezer.
2. Loosen 2 screws fixing the control box assembly to the
temperature of freezer.
1. Remove all shelves placed in the freezer.
2. Loosen 2 screws fixing the control box assembly to the
body.
3. Remove the thermistor from the control box after
separating lead wires.
GASKET
DOOR LINER-F
DOOR-F FOAM ASM
Figure 7
COVER
HINGE
UPPER
HINGE
UPPER
HINGE
UPPER
UPPER
Figure 6
Figure 8
HINGE LOWER-W
Figure 9
DOOR SWITCH
LEAD WIRE
Figure 10
3. DISASSEMBLY
- 6 -
CONTROL
BOX
BOX
THERMISTOR
SCREW
Figure 11
3-4 FAN AND FAN MOTOR
1. After taking out the Control Box-F, remove the grill fan
by leaning the hook upwards with a '–' type driver and
pulling it out.
pulling it out.
2. Pull out the shroud assembly.
3. Loosen 2 screws holding fan motor bracket to remove
3. Loosen 2 screws holding fan motor bracket to remove
the fan and fan motor assembly.
3-5 DEF' CONTROL ASM
Def control ASM consists of Defrost sensor and FUSE-M.
Defrost sensor functions to defrost automatically and it is
attached to the Evaporator and the metal side of the case
senses Temp.
attached to the Evaporator and the metal side of the case
senses Temp.
Fuse-M is a kind of safety device for preventing
overheating of the Heater when defrosting.
overheating of the Heater when defrosting.
At the temperature of 77
°
C(or 72
°
C), it stops the emission
of heat from the Defrost Heater.
1. After removing the Control Box, and Fan Grill loosen 2
screws and remove the Shroud by pulling it out with your
hand. (Figure 13)
hand. (Figure 13)
2. Separate the Lead Wire connected with the Def control
ASM and replace the Def control ASM after cutting the
Tie Wrap. (Figure 14)
Tie Wrap. (Figure 14)
3-6. DAMPER CONTROL
There are two Damper Controls in the Chilled Room and
Refrigerator Room. (Figures 16 and 17)
Refrigerator Room. (Figures 16 and 17)
1. Pull out the Knob Damper and remove the Control Box
after loosening screws fixing each Control Box.
(Figure 17)
(Figure 17)
NOTE : When taking out the Damper Control from the
lnner Case, don't apply too much power to the
insulation Damper and the Damper Control.
insulation Damper and the Damper Control.
3-7 LAMP
Replace the Lamp which is behind Control Box-R, by
turning it left. (Figure 18)
turning it left. (Figure 18)
Figure 18
CHILLED ROOM
REFRIGERATOR
ROOM
ROOM
Figure 16
SCREWS
Figure 17
- 7 -
FAN
BRACKET
FAN MOTOR
FAN SHROUD
FAN
DEF-SENSOR
FUSE-M
HOLDER FUSE
Figure 14
SHROUD-F
HOLDERS
Figure 13
Figure 12
8. EXPLODED VIEW
- 35 -
103A
105A
304A
317A
307A
314A
328A
312A
327A
315A
326A
325A
323A
320A
103C
319A
406B
283B
282B
282A
283A
282B
282A
418A
403A
401A
281C
281B
301A
281A
103B
411A
410H
410G
416A
416B
410F
410B
410A
407A
129A
413A
410F
410E
309A
310A
308A
501K
501F
501A
(501B,C,J,Q 504D)
318A
303A
403B
104B