LG V-C3850ND User manual

VACUUM CLEANER
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
MODEL : V-C3850ND/NT/NDV/NTV/RD/RT/RDV/RTV
V-C3852ND/NT/NDV/NTV/RD/RT/RDV/RTV
V-C3854RTV
V-C3860RD/RT/RDV/RTV
M
K

-2-
CONTENTS
SAFETY PRECAUTIONS..............................................................................................................3
SERVICING PRECAUTIONS........................................................................................................ 4
SPECIFICATIONS......................................................................................................................... 4
FEATURES.................................................................................................................................... 4
DESCRIPTION.............................................................................................................................. 5
CONTROL PANEL ........................................................................................................................ 5
VACUUM POWER ADJUSTMENT................................................................................................ 5
DISASSEMBLY INSTRUCTIONS.............................................................................................. 6~7
TROUBLESHOOTING GUIDE................................................................................................ 8~10
BLOCK DIAGRAM ................................................................................................................ 11~12
SCHEMATIC DIAGRAM........................................................................................................ 11~12
PRINTED CIRCUIT BOARD................................................................................................. 11~12
EXPLODED VIEW ............................................................................................................... 13~16
REPLACEMENT PARTS LIST .............................................................................................. 17~18
APPENDIX............................................................................................................................ 19~21
1. THE TYPE OF POWER PLUG AND PART NUMBER ............................................................................... 19
2. COLOR & PARTS NUMBER...................................................................................................................... 20
3. MOTOR & P.W.B ASS’Y & CORD REEL ASS’Y PARTS NUMBER ........................................................... 21
3828Fi5865A

-3-
SAFETY PRECAUTIONS
BEFORE OPERATING THIS VACUUM CLEANER, READ THIS SERVICE MANUAL THOROUGHLY,
AND OBSERVE EACH POINT CAREFULLY.
3828Fi5865A
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, an exhaust fil-
ter 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 sun ray.
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 sol-
vents.
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 min-
utes because it may cause harm to the motor.
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.

-4-
SERVICING PRECAUTIONS
SPECIFICATIONS
FEATURES
BEFORE ATTEMPTING TO SERVICE OR ADJUST ANY PART OF THE VACUUM CLEANER, DIS-
CONNECT THE ELECTRICAL POWER SUPPLY CORD FROM THE WALL OUTLET.
3828Fi5865A
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.
1. Strong Suction Power
This vacuum cleaner has a strong suction power because
it utilizes a highly efficient and powerful motor.
2. Automatic Cord Winding Mechanism
It is very convenient becasue it winds the cord
automatically after operating the unit.
3. Vacuum Power Adjustment
It is very convenient because vacuum power varies with
cleaning work by rotating the control button.
4. Convenient Push Button Switch
Using the switch located in the main body, this vacuum
cleaner can be operated easily.
5. Excellent Running
Running is execllent by adopting large wheel.(˘150)
6. Miscellaneous
1) The dust indicator shows you red color when to
exchange the filter bag or to clean the cloth bag.
2) The washable cloth bag can be used for a long time.
THIS VACUUM CLEANER IS THE MOST MODERN STYLE GOODS, SUITABLE FOR HOUSEHOLD USE
AND IT RUNS AFTER A NEW VARIATION IN ORDER TO MEET MODERN LIFE SENSE BY IMPROVING THE
DESIGN, THE STRUCTURE AND THE POWER.
• MODEL : REFER TO THE COVER PAGE
• POWER SOURCE : ON RATING PLATE
• POWER CONSUMPTION : ON RATING PLATE
• POWER CONTROL :
- MAIN : ROTARY ON BODY
(V-C3850RD/RT/RDV/RTV)
(V-C3854RTV)
(V-C3860RD/RT/RDV/RTV)
ON/OFF ON BODY
( V-C3850ND/NT/NDV/NTV )
(V-C3852ND/NT/NDV/NTV)
-SUB : VACUUM POWER ADJUSTMENT BY
SLIDE KNOB
• CAPACITY : 3.3L
• CORD LENGTH : 7 m
• HOSE LENGTH : 1.5 m / 1.8 m
• NET WEIGHT : 4.1 kg
• PACKING WEIGHT : 7.0 kg
• NET DIMENSION : 400 280 220 (L WH)mm
• PACKING DIMENSION : 495 330 290 (L WH)mm
(with steel pipe)
565 330 290 (L WH)mm
(with telescopic pipe)
• ATTACHMENTS
HOSE ......................................................................... 1EA
STEEL PIPE ASS’Y.................................................... 2EA
TELESCOPIC PIPE ASS’Y........................................ 1EA
PLASTIC PIPE .......................................................... 2EA
NOZZLE ASS’Y...........................................................1EA
CREVICE TOOL (ON BOARD).................................. 1EA
DUST BRUSH (ON BOARD).......................................1EA
CLOTH BAG ASS’Y (OPTION)...................................1EA
EXTRA PAPER BAG ASS’Y (PAPER, OPTION)........1EA
UPHOLSTERY NOZZLE(OPTION).............................1EA
QUILT, NOZZLE ASM(OPTION).................................1EA
•This specifications are subject to change according to the buyer's request.

3828Fi5865A
CONTROL PANEL
-5-
CONTROL LOCATION
Telescopic Tube
Handle &
Cord Reel Button
Metal or Plastic
Tube
Nozzle
Pedal
Pedal
Nozzle
Suction Hole
Flexible Hose Ass’y
Hose Head
Hose Button
Dust Indicator
Control Button
(ON/OFF)
(Rotary)
Power Cord
Body Cover
Wheel
Filter Cover
Cover Latch
ATTACHMENTS
Filter Bag
(Option)
Crevice Tool
(On Board)
Dusting Brush
(On Board) Upholstery Nozzle (Option) Cloth Bag (Option)
Quilt Nozzle Ass’y
(Option)
Control Button
Flexible Hose Ass’y
To allow precise regulation of the suction power of the
vacuum cleaner or to suit the type of cleaning work being
undertaken, simply rotate the control button, or push
“Control Button”
VACUUM POWER ADJUSTMENT
When you want to control the vacuum power for
curtains and clothes, slide the slide knob on the
handle.

3828Fi5865A
DISASSEMBLY INSTRUCTIONS
NOTE: Before attempting to service or adjust any part of the vacuum cleaner, disconnect the electrical power supply cord
from the wall outlet.
Filter Cover
Cover Latch
Filter Cover
Handle
Body Cover
-6-
• Almost all of the parts of this vacuum cleaner can be
disassembled 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.
1. Filter Cover Assembly Replacement
1) Open filter cover by pushing cover latch.
2) First, lift the filter cover
- Push the hinge side by inserting flat screw driver in gap
between hinge and handle.
Then the “Handle”will be detached.
- As same method, detach the filter cover.
2. Body Cover Assembly Replacement
1) Remove the four screws fastening the body base.
2) Lift body cover in the direction of the arrow.
3) Strip off the lead wires from the motor & cord reel.

3828Fi5865A
-7-
Body Cover
Support Board
Button Spring Control ButtonSwitch
Control Button
Button Spring
Support Board
PWB Assembly
3. P.W.B Assembly Replacement
1) Remove a screw fastening “Support Board”on body cover
2) Push the flat driver in the direction of arrow.
3) Detatch P.W.B assembly, control button, button spring and
support board from body cover.
4) When reassembling, assemble control button after rotating
the switch of P.W.B assembly in the direction of the arrow.
4. Motor Assembly Replacement.
•Lift the motor assembly in the direction of the arrow after
stripping off the lead wires.
5. Cord Reel Assembly Replacement
•Lift the cord reel assembly from the body base in the
direction of the arrow.

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
Motor armature cut
Ball bearing defacement
Impeller hindrance
(Caused by foreign matters)
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
Exchange the motor
Exchange the motor
Remove the foreign matters
Normal
Abnormal
-8-
TROUBLE SHOOTING GUIDE
1. SWITCH ON BUT MOTOR DOSE NOT RUN.
3828Fi5865A
2. SWITCH ON, MOTOR DOES NOT RUN BUT BUZZES.

3828Fi5865A
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
Rotating switch is on low
mode Rotate it with clock-wise so
power is increasd
Remove the foreign matters
or exchange the filter bag or
clean the cloth bag
-9-
3. SWITCH OFF BUT MOTOR RUNS.
4. WEAK SUCTION POWER

3828Fi5865A
-10-
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
Poor capacitor Exchange the capacitor
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

3828Fi5865A
-11-
BLOCK DIAGRAM
CIRCUIT DIAGRAM
T/S
C1
0.47
250V
S/W M
BR:BROWN BL:BLUE
SCHEMATIC DIAGRAM
BR:BROWN BL:BLUE
BL
BL
BR
PWB
S/W
BR
PLUG
CORD
REEL
ASS'Y
MOTOR
T/S
T/S
BL
S/W
BL
BR
BR
PLUG
PWB
V-C3850ND/NT/NDV/NTV
V-C3852ND/NT/NDV/NTV

3828Fi5865A
-12-
BLOCK DIAGRAM
CIRCUIT DIAGRAM
R3
3.9K
1/2W
R2
33
1/2W
R4
33
1/2W
DIAC G
R5 VR1 VR2
C3
T2
TRIAC
SLIDE VOLUME
T1
S/W T.S
R1
100
1/2W
C2
0.1uF
250V
C1
0.47uF
250V
M
BR:BROWN BL:BLUE
SCHEMATIC DIAGRAM
BR:BROWN BL:BLUE
BL
BL
BR
PWB
S/W
BR
PLUG
CORD
REEL
ASS'Y
MOTOR
T/S
T/S
BL
S/W
BL
BR
BR
PLUG
PWB
V-C3850RD/RT/RDV/RTV V-C3854RTV
V-C3852RD/RT/RDV/RTV V-C3860RD/RT/RDV/RTV

3828Fi5865A
-13-
EXPLODED VIEW
149601
152301
130401
144411
146871
650581
652031
139201 139202
146811
146601
152312
152311
139204 152302
BASE ASSEMBLY, BODY

3828Fi5865A
-14-
EXPLODED VIEW
343501
339201
235501
236501
335501
335211
340261
252311
235502
250204
249701
168711
349801
COVER ASSEMBLY, BODY
250204
249701
168711
349801

3828Fi5865A
-15-
TYPE 1 TYPE 2
HOSE ASSEMBLY, FLEXIBLE
452151
435501
452001
449401 449401
452001
435501
552493 552491
NZ-10
NZ-12
NZ-15
NZ-16
NZ-17
NZ-5
NZ-4
NOZZLE ASSEMBLY

3828Fi5865A
-16-
EXPLODED VIEW
652481
650631 652011 652012
ACCESSORIES

3828Fi5865A
-17-
REPLACEMENT PARTS LIST
139201 3920FI4718M PACKING, DUST SEAL NR
149601 4960FI2322A
149601 MOUNT, BAG
149601
130401 3040FI1490A SHADOW GRAY
130401 BOSE, BODY
130401
152301 4I70098K FILTER(MECH) POLYESTER
MOTOR SAFETY
144411 4441FI3605C CASTER ASS’Y BLACK
144411
144411
146601 4660fi2412A SHADOW GRAY
146601 WHEEL
146601
152311 5231FI3512B FILTER ASS’Y, PAPER
152312 5231FI2443A FILTER ASS’Y, CLOTH
650581 3I21007N TOOL, CREVICE BLACK
650581 3I21007L MIDDLE GRAY
652031 3I20011E BLACK
BRUSH ASS’Y, DUST
652031 MIDDLE GRAY
146871 4687FI1472 CORD REEL ASS’Y Refer To Appendix
146811 4681FI2456 MOTOR ASS’Y, VC Refer To Appendix
139202 3920FI3766A PACKING, MOTOR MOUNT NBR
152302 4I23008B PACKING, ABSORBING PU-FOAM
139204 3920FI3763A PACKING, SEAL
335501 3550FI1578 COVER, FILTER Refer To Appendix
340261 4026FI3671 LATCH Refer To Appendix
243501 4350FI3776 RING, CONNECTOR Refer To Appendix
339201 3920FI3734 PACKING, SEAL
335211 3521FI3703A INDICATOR ASS’Y
236501 3650FI1490 HANDLE Refer To Appendix
235501 3550FI1579 COVER, BODY Refer To Appendix
235502 3550FI1580 COVER, REAR Refer To Appendix
250204 5020FI3774 BUTTON, CONTROL Rotary, Refer To Appendix
250204 5020FI3777 BUTTON, CONTROL ON/OFF, Refer To Appendix
249701 4970FI3206A SPRING, BUTTON HSWR
LOCATION No. PART No. DESCRIPTION REMARK

3828Fi5865A
-18-
REPLACEMENT PARTS LIST
252311 5231FI3772A FILTER ASS’Y, EXHAUSTER
252311 5231FI3772A
349801 4980FI2425 BOARD, SUPPORT Rotary, Refer To Appendix
349801 4980FI2426 BOARD, SUPPORT ON/OFF, Refer To Appendix
168711 6871FX2148 PWB(PCB) ASS’Y Rotary, Refer To Appendix
168711 6871FX2148 PWB(PCB) ASS’Y ON/OFF, Refer To Appendix
452151 5215FI1306A HOSE ASS’Y, FLEXIBLE OPTION(TYPE 2)
452151 5215FI1248A OPTION(TYPE 1)
452001 3650FI2275A HANDLE, GRIP TYPE 2
436501 3650FI1471A TYPE 1
449401 4940FI4292B KNOB, SLIDE TYPE 1
449401 4940FI3723A TYPE 2
435507 5200FI2269A PIPE, FITTING TYPE 1,2
443501 4350FI3497A RING, CLOSING BLACK
443501 4350FI3497B MIDDLE GRAY
552491 5249FI2253A NZ-10
552491 5249FI2393A NZ-12
552491 5249FI1387A NZ-15
552491 5249FI1388A NOZZLE ASS’Y FLOOR NZ-16
552491 5249FI1389A NZ-17
552491 5249FI2182A NZ-5
552491 1I12001F NZ-4, BLACK
552491 1I12001H NZ-4, M/GRAY
552491 1I12001G NZ-4, BLACK
552491 1I12001J NZ-4, M/GRAY
552493 5249FI1390C NOZZLE, ASS’Y, QUILT BLACK
552493 5249FI1390E BLACK+BLUE
652011 5201FI2324A PIPE ASS’Y, STEEL 2 STEP STEEL
650631 5063FI2291A WAND ASS’Y 2 STEP PLASTIC
652012 5201FI2443E PIPE ASS’Y, TELESCOPIC 2 STEP PLASTIC
652012 5201FI2443F 2 STEP PLASTIC
652481 5249FI2259A NOZZLE ASS’Y, UPHOLSTERY BLACK
652481 5249FI2259B MIDDLE GRAY
LOCATION No. PART No. DESCRIPTION REMARK

3828Fi5865A
-19-
APPENDIX
1. THE TYPE OF POWER CORD & PARTS NUMBER
TYPE TYPE OF PLUG
CORD REEL ASS’Y P/NO
APPLICATION
(L/NO.:146871)
A-1
S-1
C-2
C-1
B-3
17
6.3
12.7
1719
19
4.8
19
19
4
Color identification
of fuse
Brown 13A
Yellow 5A
Blue 3A

3828Fi5865A
-20-
2. COLOR & PARTS NUMBER
BASF
BLUE SHADOW GRAY
335501 COVER, FILTER 3550FI1378A
340261 LATCH 4026FI3671A
24350 RING, CONNECTOR 4350FI3776A
236501 HANDLE 3650FI1490A
235501 COVER, BODY 3550FI1579A
235502 COVER, REAR 3550FI1580A
250204 BUTTON, CONTROL (for Rotary) 5020FI3774A
250204 BUTTON, CONTROL (for ON/OFF) 5020FI3777A
349801 BOARD, SUPPORT (for Rotary) 4980FI2425A
349801 BOARD, SUPPORT (for ON/OFF) 4980FI2426A
LOCATION
NO.
COLOR
DESCRIPTION
BASF
BLUE SHADOW GRAY
335501 COVER, FILTER 3550FI1378A
340261 LATCH 4026FI3671A
24350 RING, CONNECTOR 4350FI3776A
236501 HANDLE 3650FI1490A
235501 COVER, BODY 3550FI1579A
235502 COVER, REAR 3550FI1580A
250204 BUTTON, CONTROL (for Rotary) 5020FI3774A
250204 BUTTON, CONTROL (for ON/OFF)
349801 BOARD, SUPPORT (for Rotary)
349801 BOARD, SUPPORT (for ON/OFF)
LOCATION
NO.
COLOR
DESCRIPTION
BASF
BLUE SHADOW GRAY
335501 COVER, FILTER 3550FI1378A
340261 LATCH 4026FI3671A
24350 RING, CONNECTOR 4350FI3776A
236501 HANDLE 3650FI1490A
235501 COVER, BODY 3550FI1579A
235502 COVER, REAR 3550FI1580A
250204 BUTTON, CONTROL (for Rotary) 5020FI3774A
250204 BUTTON, CONTROL (for ON/OFF)
349801 BOARD, SUPPORT (for Rotary)
349801 BOARD, SUPPORT (for ON/OFF)
LOCATION
NO.
COLOR
DESCRIPTION
BASF
BLUE SHADOW GRAY
335501 COVER, FILTER 3550FI1378A
340261 LATCH 4026FI3671A
24350 RING, CONNECTOR 4350FI3776A
236501 HANDLE 3650FI1490A
235501 COVER, BODY 3550FI1579A
235502 COVER, REAR 3550FI1580A
250204 BUTTON, CONTROL (for Rotary) 5020FI3774A
250204 BUTTON, CONTROL (for ON/OFF)
349801 BOARD, SUPPORT (for Rotary)
349801 BOARD, SUPPORT (for ON/OFF)
LOCATION
NO.
COLOR
DESCRIPTION