LG GR-B197GVQ Service Manual page 73

TROUBLE DIAGNOSIS
-73-
CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK
7. Sounds
1) Compressor
compartment
operating sounds.
Transformer sound.
Drip
tray
vibration sound.
Back
cover
machine sound.
Condenser drain sound.
2)
Freezer
compartment
sounds.
Fan
motor
sound.
Sounds from fan
contact.
Unbalance fan sounds.
Motor shaft
contact
sounds.
Resonance.
Evaporator
noise.
3) Bowls and bottles make contact
on
top
shelf.
4) Refrigerator
roof
contact.
5) Refrigerator
side
contact.
6) Insufficient lubricants
on
door hinge.
Its
own
fault.
----
Core gap.
Bad connection.
----
Correct
screw
connection.
Bad assembly.
Distortion.
Foreign
materials inside.
Bad connection.
Partly damaged.
Not connected.
Bad
pipe caulking.
Normal
operating
sound.
Vibration sound.
Aged bushing seat.
Bad
torque
for
assembling motor
bracket.
Fan guide contact.
Shroud burr
contact.
Damping evaporator contact.
Residual frost
contact.
Unbalance.
Ice
on
the fan.
----
Air intake (opposite to motor
bushing assembly.)
Supporter
disorted.
Tilted
during motor assembly.
Evaporator pipe contact.
----
No
damping
evaporator.
Sound from
refrigerant.
----
Stainless steel
pipe shape
in
accumulator.
Sound from fin
evaporator
and
pipe during expansion
and contraction.
Damaged
heater cord.
Narrow
evaporator
interval.
Surface machining conditions.
Fan distortion.
Misshappen.
Burr.