LG GR-B197GVQ Service Manual page 74

TROUBLE DIAGNOSIS
-74-
CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK
8.
Faulty lamp
(freezer
and
refrigerator
compartment).
9.
Faulty
internal
voltage
short.
1) Lamp problem.
Filament blows
out.
Glass is broken.
2)
Bad
lamp assembly.
Not inserted.
Loosened
by
vibration.
3) Bad lamp socket.
Disconnection. Bad soldering.
Bad rivet
contact.
Short. Water
penetration
Low
water
level in
tray.
Bad
elasticity
of
contact.
Bad contact corrosion.
4) Door switch. Its
own
Defective.
Refrigerator
and freezer Switches
are
reversed.
Travel distance.
Bad connection.
Bad terminal
contact.
P/U
liquid
leak.
1)
Lead wire is
damaged.
Wire damage when assembling
P.T.C. Cover.
Outlet burr in the bottom
plate.
Pressed
by
cord heater, lead wire, evaporator
pipe.
2) Exposed
terminal.
Compressor Compartment
terminal.
-
Touching
other
components.
Freezer
compartment
terminal.
-
Touching
evaporator
pipe.
3) Faulty
parts.
Transformer. Coil
contacts
cover.
Welded terminal
parts
contact
cover.
Compressor. Bad coil insulation.
Plate heater.
Melting
fuse.
Sealing
is broken. Moisture
penetration.
Cord heater.
Pipe damaged.
Moisture
penetration.
Bad
sealing.
Sheath heater.
Connect conduction and
non-conduction
parts
and
check with tester.
Conduction: NG.
Resistance∞: OK.