LG V-CP872ST User manual

VACUUM CLEANER
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE
"SAFETY PRECAUTIONS" IN THIS MANUAL.
MODEL : V-CP872ST
VACUUM CLEANER
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE
"SAFETY PRECAUTIONS" IN THIS MANUAL.
MODEL :
Internal Use Only
Website http://biz.lgser vice .com
P/No.: 3828FI5893K
printed in China

2
CONTENTS
SAFETY PRECAUTIONS......................................................................................................... 3
SERVICING PRECAUTIONS ................................................................................................... 3
DESCRIPTION ......................................................................................................................... 4
SPECIFICATIONS .................................................................................................................... 4
DISASSEMBLY ....................................................................................................................5~6
TROUBLESHOOTING GUIDE..............................................................................................7~9
BLOCK DIAGRAM................................................................................................................. 10
SCHEMATIC DIAGRAM..........................................................................................................10
CIRCUIT DIAGRAM ................................................................................................................10
EXPLODED VIEW............................................................................................................ 11~13
MEMO.........................................................................................................................................
Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only
Only for training and service purposes

3
Before operating this vacuum cleaner, read this service manual thoroughly, and observe
each point carefully.
1. Change the paper bag or clean the cloth bag in
case the indicator moves toward red.
1) If the dust bag is full, intake power will be reduced.
2) When the dust bag is full of dust, pull out the dust bag
from the inside of body base.
2. Filter
1) The filter is composed of a clean filter, a exhaust filter
and a paper bag or a cloth bag.
2) Never use the vacuum cleaner without filters.
It may harm to the motor.
3) When the cloth bag, the clean filter and the exhaust
filter are soiled, wash the filter with neutral cleanser.
NOTE : Re-use of the cloth bag, clean filter and
exhaust filter.
Never wash the filter in a washing machine or in a
dishwasher.
Never use hot water for washing the filter.
Re-use the filter after drying it completely in the
shade.
Do not dry near fire or direct sunray.
3. Dust indicator
Dust indicator shows you red color when the filter is full of
dust.
Then, change the paper bag with new one or clean the
cloth bag.
4. Avoid suction such materials as :
1) Liquid or wet dust : Clogging the ventilation holes,
reduces the intake power significantly and harms the
motor.
2) Inflammable liquids such as benzene, alcohol or
solvents.
3) Burning objects such as cigarette butts.
4) Bulky objects such as vinyl, paper etc.
5) Sharp objects such as needles, pins, metal or glass
particles etc.
5. Attachments
• Nozzle : for cleaning wooden floor, the room floor and
carpet.
• Crevice Tool : for cleaning any crevice, inside corners
of window frames.
However, do not use the crevice tool more than 20
minutes because it may cause harm to the motor.
• Dusting brush : for delicate vacuuming of fabrics on
the furniture, curtains, etc.
• Upholstery Nozzle : for vacuuming the dust on the
upholstery.(option)
6. Close supervision is necessary when this
vacuum cleaner is used by or near children.
Children's carelessness may cause damage to
the cleaner or injure persons.
7. Air exhausted from the vacuum cleaner is
normally warm. But if extraordinarily hot air is
exhausted, check if the telescopic tube, hose or
dust bag is clogged or not.
8. Electric shock could occur if used outdoors or
on wet surfaces.
SAFETY PRECAUTIONS
SERVICING PRECAUTIONS
BEFORE ATTEMPTING TO SERVICE OR ADJUST ANY PART OF THE VACUUM CLEANER,
DISCONNECT THE ELECTRICAL POWER SUPPLY CORD FROM THE WALL OUTLET.
1. Motor exchange
1) Separate the Body Cover and Body Base by
unfastening the screws.
2) Disconnect the lead wires.
3) Lift the old motor and replace it with a new one.
2. In case of exchanging other parts, refer to the
exploded view.
Copyright © 2007 LG Electronics. Inc. All right reserved.
LGE Internal Use Only Only for training and service purposes

DESCRIPTION
4
SPECIFICATIONS
Carpet Pedal
Tool ASS’Y
Nozzle
Power Cord
Switch Button
Switch Knob
Cord Reel Button
Dust Indicator
Suction Inlet
Wheel
Telescopic Pipe
ASS’Y
Flexible Hose ASS’Y
Steel Pipe
ASS’Y
ATTACHMENTS
Nozzle Nozzle
Pedal
EXTRA FILTER BAG ASS’Y
(OPTION)
CLOTH BAG ASS’Y
(OPTION)
CREVICE TOOLDUSTING BRUSH UPHOLSTERY NOZZLE
(OPTION)
ACCESSORY HOLDER
(OPTION)
• MODEL
• POWER SOURCE : ON RATING PLATE
• POWER CONSUMPTION : ON RATING PLATE
• POWER CONTROL : SLIDE CONTROL ON HOSE
• CAPACITY : 1.5 L
• CORD LENGTH : 5 m / 5.5 m
• HOSE LENGTH : 1.5 m
• NET WEIGHT : 3.8 kg
• NET DIMENSION: 267 x 314x 260(WXDXH)mm
• PACKING DIMENSION: 495X290X330(WXDXH)mm
- for steel pipe
570X290X330(WXDXH)mm
-for telescopic pipe
•This specifications are subject to change according to
the buyer's request.
• ATTACHMENTS
HOSE ....................................................................1EA
STEEL PIPE ASM
TELESCOPIC PIPE ASM OR
.........................1EA
NOZZLE ASM .......................................................1EA
CREVICE TOOL ...................................................1EA
PAPER BAG ASSY OR ...................................1EA
CLOTH BAG ASSY
DUSTING BRUSH ................................................1EA
UPHOLSTERY NOZZLE(OPTION) ......................1EA
ACCESSORY HOLDER(OPTION) .......................1EA
Quilt Nozzle assy
(OPTION)
Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only
Only for training and service purposes

5
•Almost all the parts of this vacuum cleaner can be
assembled with a screw driver and each connecting
component easily fits each other. Disassemble one by
one referring to the exploded view.
•If possible, don’t disassemble except for the
necessary parts. It is not necessary to disassemble
the parts that are not detailed in the exploded view.
DISASSEMBLY
NOTE: Before attempting to service or adjust any part of the vacuum cleaner, disconnect the electrical
power supply cord from the wall outlet.
1. Filter Cover Assembly Replacement
1) Open filter cover by lifting the front as shown.
2) Push the hinge side by inserting flat screw driver
in crack between hinge and body cover.
3. Body Cover Assembly Replacement
1) Remove the six screws fastening the body base
and lift body cover in the direction of the arrow.
2. Indicator Assembly Replacement
1) Grasp indicator assembly and push it out in the
direction of the arrow.
2) Lift the indicator assembly.
Indicator
Screw
4. Push Switch Assembly Replacement
1) Insert the screw driver(-) into the crevice carefully,
and take out the switch button.
Switch
Button
Copyright © 2007 LG Electronics. Inc. All right reserved.
LGE Internal Use Only Only for training and service purposes

6
2) Push the push switch down grasping the wings of
push switch by long nose.
6. Motor Assembly Replacement
•Lift the motor assembly in direction of the arrow
after stripping off the lead wires.
8. Cord Reel Assembly Replacement
•Lift the cord reel assembly from the body base in
direction of the arrow.
7. P.W.B Assembly Replacement on the Body
Base
•Lift the P.W.B Assembly in the direction of the
arrow
9. Front Cover Separation
1) Remove the front cover from body base by flat
screw driver.
5. P.W.B Assembly Replacement on the Body
Cover
•Remove two screw fastening on body cover and lift
the P.W.B assembly in the direction of the arrow.
Motor ASS'Y
Cord Reel
ASS'Y
P.W.B ASS'Y
Front Cover
Push Switch
Long Nose
Pliers
Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only
Only for training and service purposes

7
SOLUTIONCAUSE
Check the power source
CHECKING
Poor plug insertion
Power cord cut
Interior lead wire cut
Motor(stator armature) coil cut
or damaged
Poor contact carbon brush
defaced
Insert again
The fuse is melt down
in the coverknife switch Exchange the fuse
Repair or exchange
Exchange the lead wire
Exchange the motor
Exchange or repair
Poor switch contact point Exchange the switch
Normal
Abnormal
Motor armature cut
Ball bearing defacement
Impeller hindrance
(Caused by foreign matters)
Exchange the motor
Exchange the motor
Remove the foreign matters
TROUBLE SHOOTING GUIDE
1. Switch on but motor does not turn
2. Switch on, motor does not turn but buzzes
Copyright © 2007 LG Electronics. Inc. All right reserved.
LGE Internal Use Only Only for training and service purposes

8
Poor connection
Poor switch
Carbon brush defaced
Motor armature cut
Foreign matters attached to
the impeller
Low voltage
Hose and extension wands are
clogged with foreign matters
Filter bag or cloth bag is filled
with inhaled foreign matters
Repair
Exchange the switch
Exchange the carbon brush
or the motor
Exchange the motor
Remove the foreign matters
Inquire to the power utility
company
Remove the foreign matters
in the hose or extension wands
Low rotation speed
Motor turns normally,
but suction power is weak
The slide knob on the handle
is opened
Close the slide knob by
sliding it
Remove the foreign matters
or exchange the filter bag or
clean the cloth bag
3. Switch off but motor turns
4. Weak suction power
Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only
Only for training and service purposes

9
Poor cord, lead wire
Poor carbon brush rectified
Poor electric connector
or receiver
Exchange cord, lead wire
Exchange the carbon brush
or the motor
Repair the electric connector
or receiver
Bent connection parts
Poor connection
(Caused by foreign matters)
Exchange the parts
Remove the foreign matters
and reconnect
Loose parts
Unbalanced motor assembly
Foreign matters are attached
to the impeller
Poor carbon brush rectification
Secure firmly
Exchange or repair the motor
Remove the foreign matters
Exchange the carbon brush
or the motor
Armature is cut or foreign
matters attached
Exchange motor
Remove foreign matters
5. VIBRATION NOISES
6. RADIO, TV RECEPTION DISTURBANCE
7. IMPROPER TUBE OR NOZZLE CONNECTION
Copyright © 2007 LG Electronics. Inc. All right reserved.
LGE Internal Use Only Only for training and service purposes

10
BLOCK DIAGRAM
BL
BL
BR
BR
PLUG
CORD
REEL
ASS'Y
P.W.B
P.W.B
MOTOR
BR:BROWN BL:BLUE
BL
BR
BR
PLUG
MCORD
REEL
ASM
BR:BROWN BL:BLUE
SLIDE VOLUME S/W FLEXIBLE HOSE ASS'Y
SLIDE VOLUME S/W FLEXIBLE HOSE ASS'Y
SCHEMATIC DIAGRAM
CIRCUIT DIAGRAM
Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only
Only for training and service purposes

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MCQBA1
MDSBA1
EAUBA1
MCQBM1
MEBBC1
MBGCC1
MDJBE1
EBRBM1
AJWBA1
AHJBA1
AESCA1
MCKCF1
MBGCR1
MEYCC1
MAMBB1
MDSBA1
MCKBN1
MFGBF1
AHDBR1
EXPLODED VIEW
MBFBC1
MCKCB1
Copyright © 2007 LG Electronics. Inc. All right reserved.
LGE Internal Use Only
Only for training and service purposes
BASE/COVER ASSEMBLY, BODY
MDJBM1
MCQCA1
EBFCP1
EBRCM1

12
AEMAF1

13
AGBN30
ADQBP1
AGRPT1
ABCAD1
MFVAC1
AGBNU1