LG V-3947TV Service Manual ▷ View online
TROUBLE SHOOTING
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1. SWITCH ON BUT MOTOR DOES NOT TURN
2. SWITCH ON, MOTOR DOES NOT TURN BUT BUZZES
Checking
Cause
Solution
Check the power
source
source
The fuse is melt down in
the coverknife switch
the coverknife switch
Poor plug insertion
Power cord cut
Motor(stator armature)
coil cut or damaged
coil cut or damaged
Poor contact carbon
brush defaced
brush defaced
Poor switch contact point
Motor armature cut
Ball bearing defacement
Impeller hindrance
(Caused by foreign matters)
(Caused by foreign matters)
Exchange the motor
Exchange the motor
Remove the foreign
matters
matters
Exchange the fuse
Insert again
Repair or exchange
Interior lead wire cut
Exchange the lead wire
Exchange the motor
Exchange or repair
Exchange the switch
Normal
Abnormal
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4. WEAK SUCTION POWER
3. SWITCH OFF BUT MOTOR TURNS
Poor connection
Poor switch
Repair
Exchange the switch
Carbon brush defaced
Motor armature cut
Exchange the carbon
brush or the motor
brush or the motor
Exchange the motor
Foreign matters attached
to the impeller
to the impeller
Remove the foreign
matters
matters
Low voltage
Inquire to the Power utility
company
company
Low rotation speed
Hose and extension wands
are clogged with foreign
matters
are clogged with foreign
matters
Remove the foreign
matters in the hose or
extension wands
matters in the hose or
extension wands
Motor turns normally,
but suction power is
weak
but suction power is
weak
Filter bag or cloth bag is filled
with inhaled foreign matters
with inhaled foreign matters
The slide knob on the handle
is opened
is opened
Remove the foreign
matters or exchange the
filter bag or clean the cloth
bag
matters or exchange the
filter bag or clean the cloth
bag
Close the slide knob by
sliding it
sliding it
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5. VIBRATION NOISES
6. RADIO, TV RECEPTION DISTURBANCE
7. IMPROPER HOSE OR NOZZLE CONNECTION
Loose parts
Unbalanced motor assembly
Foreign matters are attach
to the impeller
to the impeller
Poor carbon brush
rectification
rectification
Armature is cut or foreign
matters attached
matters attached
Secure firmly
Exchange or repair the motor
Remove the foreign matters
Exchange the carbon
brush or the motor
brush or the motor
Exchange motor
Remove foreign matters
Remove foreign matters
Poor cord, lead wire
Poor carbon brush rectified
Poor electric connector or
receiver
receiver
Poor capacitor
Exchange cord, lead wire
Exchange the carbon
brush or the motor
brush or the motor
Repair the electric
connector or receiver
connector or receiver
Exchange the capacitor
Bent connection parts
Poor connection
(Caused by foreign matters)
(Caused by foreign matters)
Exchange the parts
Remove the foreign matters
and reconnect
and reconnect
- 9 -
5. VIBRATION NOISES
6. RADIO, TV RECEPTION DISTURBANCE
7. IMPROPER HOSE OR NOZZLE CONNECTION
Loose parts
Unbalanced motor assembly
Foreign matters are attach
to the impeller
to the impeller
Poor carbon brush
rectification
rectification
Armature is cut or foreign
matters attached
matters attached
Secure firmly
Exchange or repair the motor
Remove the foreign matters
Exchange the carbon
brush or the motor
brush or the motor
Exchange motor
Remove foreign matters
Remove foreign matters
Poor cord, lead wire
Poor carbon brush rectified
Poor electric connector or
receiver
receiver
Poor capacitor
Exchange cord, lead wire
Exchange the carbon
brush or the motor
brush or the motor
Repair the electric
connector or receiver
connector or receiver
Exchange the capacitor
Bent connection parts
Poor connection
(Caused by foreign matters)
(Caused by foreign matters)
Exchange the parts
Remove the foreign matters
and reconnect
and reconnect