LG GR-472, Service Manual

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SAFETY PRECAUTIONS ....................................................................................................................................................... 2
SERVICING PRECAUTIONS.................................................................................................................................................. 3
SPECIFICATIONS ............................................................................................................................................................... 4-5
PARTS IDENTIFICATION.................................................................................................................................................... 6-7
DISASSEMBLY.................................................................................................................................................................... 8-9
DOOR................................................................................................................................................................................... 8
DOOR SWITCH.................................................................................................................................................................... 8
THERMISTOR ...................................................................................................................................................................... 8
FAN AND FAN MOTOR........................................................................................................................................................ 8
DEF' CONTROL ASM .......................................................................................................................................................... 9
LAMP.................................................................................................................................................................................... 9
CONTROL BOX-R................................................................................................................................................................ 9
ADJUSTMENT ................................................................................................................................................................. 10-11
COMPRESSOR.................................................................................................................................................................. 10
PTC-STARTER................................................................................................................................................................... 10
OLP (OVER LOAD PROTECTOR)..................................................................................................................................... 11
CIRCUIT DIAGRAM......................................................................................................................................................... 11-12
TROUBLESHOOTING..................................................................................................................................................... 13-18
COMPRESSOR AND ELECTRIC COMPONENTS ........................................................................................................... 13
PTC AND OLP.................................................................................................................................................................... 14
ANOTHER ELECTRIC COMPONENTS ............................................................................................................................ 15
SERVICE DIAGNOSIS CHART.......................................................................................................................................... 16
REFRIGERATING CYCLE ............................................................................................................................................ 17-18
DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM ................................................................................................19-40
EXPLODED VIEW ........................................................................................................................................................... 41-44
REPLACEMENT PARTS LIST ............................................................................................................................................ 45-
CONTENTS
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Please read the followings before servicing your refrigerator.
1. Check if an electric leakage occurs in the set.
2. To prevent electric shock, unplug prior to servicing.
3. In case of testing with power on, wear rubber gloves to
prevent electric shock.
4. If you use any appliances, check regular current, voltage
and capacity.
5. Don't touch metal products in cold freezer with wet hand.
It may cause frostbite.
6. Prevent water flowing to electric elements in mechanical
parts.
7. When you stand up during observing the lower part
with the upper door open, move with care to prevent
head wound which may happen by hitting the upper
door.
8. When sloping the set, remove any materials on the set,
especially thin plate type. (ex.: glass shelf or books.)
9. When servicing evaporator part, wear cotton gloves
without fail. It is to prevent wound by sharp fin of
evaporator.
10. Leave a breakage of refrigerating cycle to a heavy
service center. The gas in cycle inside may soil
ambient air.
SAFETY PRECAUTIONS