GR-642TVPF — LG Refrigerator Service Manual (repair manual)

Model
GR-642TVPF
Pages
20
Size
3.85 MB
Type
PDF
Document
Service Manual
Brand
Device
Refrigerator
File
gr-642tvpf.zip
Date

View LG GR-642TVPF Service Manual online

FOCUSED
COOLING
FRZ. TEMP
FEF. TEMP
COLD
SUPER FREEZE
SUPER COOL
FOCUSED
COOLING
FRZ. TEMP
REF. TEMP
COLD
COLDEST
COLDEST
SUPER FREEZE
SUPER COOL
2
1
2
1
C
N
L
M
M
M
1   2   3
1  2  3  4  5  6  7  8  9 10 11 12
1
2
3
4
5
6
7
8
9
10
11
12
13
BL
BL
BO
BO
GY
GY
BN
BN
PR
PR
SB
SB
PWB ASSY,MAIN
DISPLAY CONTROL P.W.B
CIRCUIT DIAGRAM
FUNCTION TEST METHOD
NOTICE BEFORE TESTING
1) If there is any ERROR during power on state, ERROR CODE is displayed with
TEMP. CONTROL LEDs 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.
YL
BK BN RD BO YL  GN BL  PR  GY WH SB PK
1  2  3  4  5  6  7  8  9 10 11 12 13
BK BN RD BO YL  GN BL  PR  GY WH SB PK GN/YL
BL
1   2   3   4   5 
1   2   3   4   5   6   7   8   9 
GY
PK
BK
PR
RD
BN
BO
BK
YL
SB
BLACK
YELLOW
SKY BLUE
:
:
:
BN
GN
PK
BROWN
GREEN
PINK
:
:
:
GY
WH/BK
GRAY
       WHITE/BLACK
 :  
        : 
BO
PR
BRIGHT ORANGE
PURPLE
:
:
WH WHITE
:
RD
BL
GN/YL
RED
BLUE
      GREEN/YELLOW
:
:
      :
P.T.C
STARTER
CAPACITOR
PART
COMPRESSOR
EARTH PART
4
5
2
3
BL
RD
PK
STARTING
RUNNING
BL
RD
BN
BK
RD
PR
BK
GY
YL
GN/YL
F-SENSOR
DEF-SENSOR
SUPER FROST
SENSOR
R1-SENSOR
R2-SENSOR
MOTOR
DAMPER
REED SWITCH
YL
POWER
SUPPLY
CORD
BK
• OPTION PART,
ON CIRCUIT PART,
THE PLUG TYPE,
COMPRESSOR EARTH
PART ON CIRCUIT
DIAGRAM ARE SUBJECT
TO CHANGE IN DIFFERENT
LOCALITES AND ACCORDANCE
WITH MODEL TYPE.
BN
BO
PK
BK
BK
TE-PLATE
L-CORD
DAMPER
MOTOR
OVER LOAD
PROTECTOR
WH
OPTION PART
CAPACITOR
F.I.R LAMP
COOLING
FAN MOTOR
FAN MOTOR
F-LAMP
RY3
RY2
RY1
RY4
RY5
R-LAMP
DOOR SW-F
DOOR SW-R
2400
2800
FUSE-M(77
˚C)
BL
BL BL
BL
BL
BK
6
S
M
C
There is TEST PIN on the MAIN PCB
(1)  SELF TEST
ON :
NO
1
2
3
4
5
6
7
MODE
TEST1
TEST2
RESET
MANIPULATION
SHORT TEST PIN
1 TIMES
SHORT 1 TIMES
IN TEST 1
SHORT 1 TIMES
IN TEST 2
COMPRESSOR, FAN
OPERATE REGARDLESS
OF TEMPERATURE
DEFROST-HEATER DAMPER DISPLAY LED
ERROR STATE
F-SENSOR
R1-SENSOR ERROR
R2-SENSOR ERROR
DEFROST SENSOR
ERROR
DEFROST ERROR
DAMPER ERROR
CHECK
SUPER FROST 
SENSOR ERROR
METHOD OF ERROR DETECT
F-SENSOR LEAD WIRE OPEN OR SHORT
R1-SENSOR LEAD WIRE OPEN OR SHORT
R2-SENSOR LEAD WIRE OPEN OR SHORT
DEFROST SENSOR LEAD WIRE OPEN OR SHORT
DEFROST HEATER, TEMPERATURE FUSE OPEN
(DISPLAYED AFTER AT LEAST 7 HOURS FROM THE
OCCURRENCE OF ERROR)
DAMPER MOTOR OR REED SWITCH LEAD WIRE
OPEN OR SHORT(DISPLAYED AFTER AT LEAST 2
MINUTES FROM THE OCCURRENCE OF ERROR) 
ERROR CODE LEDS
(2)  FUNCTION TEST
OFF :
F4
F3
F2
F1
AFTER 1 SECOND FROM PUSHING REFRIGERATOR TEMPERATURE
SWITCH AND SUPER FREEZE SWITCH CONCURRENTLY.
IF NORMAL, LEDS ARE ALL ON
IF ERROR, ONLY SUPER FREEZE GRAPHIC PART LED IS OFF
OFF
OFF
ON IF DEF-SENSOR
IS BELOW 13ºC
SUPER FREEZE,
SUPER COOL
GRAPHIC
PART LED IS ON
• IF DEF-SENSOR TEMPERATURE IS OVER 13ºC IN TEST 2 , IT GOES TO
INITIAL RESET.
• WHEN IT RETURNS TO INITIAL RESET, COMPRESSOR OPERATES
AFTER 7 MINUTES.
OPEN
CLOSE
ALL ON
F4
F3
F2
F1
ERROR DISPLAY PART
3854JD1018B
• FUSE PART APPLICATION 
FUSE
NO
FUSE 110V~127V
250V 15A
200V~240V
250V 9A
• F.I.R LAMP'S CAPACITOR
  SPECIFICATION 
F.I.R
CAPA-
CITOR
220V~240V
50Hz
60Hz
300VAC,
0.33µF
300VAC,
0.27µF
110V~127V
1  2  3  4  
RD BK  BL  BL 
M
PUMP
MOTOR
PUMP
SWITCH
3-1 DOOR
● 
Freezer Door
1. Remove the hinge cover by pulling it upwards. 
2. Loosen hexagonal bolts fixing the upper hinge to the
body and lift the freezer door.
3. Pull out the door gasket to remove from the door foam
Ass'y.
Refrigerator Door
1. Loosen hexagonal bolts fixing the lower hinge to the
body  to remove the refrigerator door only.
2. Pull out the door gasket to remove from the door foam
Ass'y.
3-2 DOOR SWITCH
1. To remove the door switch, pull out it with a '—' type
driver as shown in (figure  9).
2. Disconnect the lead wire from the switch.
3.3 FAN AND FAN MOTOR
1. Remove the freezer shelf.
2. Remove the Cover Lamp-F and Holder Cover Lamp by
loosening 2 screw fixed to ceiling of Inner Case.
3. Remove the Grille by pulling it out.
4. Pull out the Shroud and remove the Fan Motor Assy by
loosening 2 screws.
5. Pull out the fan and, separate the Fan Motor, Brackets
and the Guide Fan.
BOLT
HINGE
HINGE COVER
Figure  6
GASKET
Figure  7
LOWER HINGE
BOLT
Figure  8
DOOR SWITCH
LEAD WIRE
Figure  9
3. DISASSEMBLY
- 8 -
GUIDE FAN
FAN
SHROUD
GRILLE
FAN MOTOR
Figure  12
Figure  11
3-4 DEF' CONTROL ASSY
Def control Assy consists of Defrost Thermostat and FUSE–M.
Defrost Thermostat functions to defrost automatically and it
is attached to metal side of the Evaporator and senses
Temp.
Fuse-M is a kind of safety device for preventing over-
heating of the Heater when defrosting.
At the temperature of 77
°
C, it stops the emission of heat
from the Heater.
1. Pull out the Shroud after removing the Grille.
2. Separate the connector connected with the Def Control
Assy and replace the Def Control Assy after cutting the
Tie Wrap and removing the Holder Fuse. (Figure 14)
3-5 LAMP
3-5-1 Freezer room lamp
1. Unplug the power cord from the outlet.
2. Remove the room lamp lid by taking down while pulling
it forward with your hand after inserting finger into the
inside hole as shown in (figure 16).
3. Remove the lamp by turning it counterclockwise.
4. Assemble in reverse order of disassembly. Replacement
bulb must be the same specication as original.
3-5-2 Refrigerator room lamp
1. Unplug the power cord from the outlet.
2. Remove refrigerator shelves.
3. Remove the room lamp lid by taking down while pulling
forward with your hands as shown in (figure 17).
4. Turn the lamp counterclockwise.
5. Assemble in reverse order of disassembly. Replacement
bulb must be the same specification as original.
3-6 CONTROL BOX-R
1. First, remove all shelves in the refrigerator and Control
Box-R by loosening 1 screw.
2. Loosen 2 screws fixing the Control Box-R to the Inner
Case after detaching the cap screw.
3. Remove the Control Box-R by pulling it downward.
SHROUD-F
Figure  13
FAN
DEF-THERMO
FUSE-M
HOLDER FUSE
Figure  14
FREEZER ROOM LAMP
REFRIGERATOR ROOM LAMP
Figure  16
Figure  17
CONTROL BOX-R
COVER LAMP-R
MULTI FLOW 
DUCT
Figure  18
- 9 -
8-2. GR-642TVP
▼ The parts of refrigerator and the shape of each part are subject to change in different localities.
▼ Capacitors and fuse are optional parts.
- 45 -
304A
106A
283D
501F
501A
501K
(501B,C,J,Q 504D,E)
406B
406B
104A
103C
411A
410G
416A
410B
410A
106A
309A
323B
318A
308A
314A
307A
312A
315A
317A
310A
103B
103A
281B
281C
281A
151E
151F
283B
282G
282B
282H
328A
329C
420A
410H
158A
158B
409A
120B
105A
129A
610E
301A
401A
315B
315B
283C
120A
110A
418A
303A
303B
407A
328B
315C
282A
403B
319A
501B
501J
501C
319C
158D
409B
604E
604G
158E
158C
403A
Page of 20

Download LG GR-642TVPF Service Manual (Repair Manual)

Here you can view online or download LG GR-642TVPF Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair LG GR-642TVPF Refrigerator. Information contained in LG GR-642TVPF service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).