LG 31412 Service Manual ▷ View online
4. SERVICE INFORMATION
4-1. WIRING DIAGRAM
21
WIRING DIAGRA
M
▶ Be sure to unplug the power to repair and replace
electric parts.
ESD (ElectroStatic DIscharge) WARNING
Be sure to follow proper ESD and grounding
precautions for diagnosis and repair. If this is
not possible, touch the ground wire on a
regular basis to remove any static charge built
up on your person.
precautions for diagnosis and repair. If this is
not possible, touch the ground wire on a
regular basis to remove any static charge built
up on your person.
4-2. DISASSEMBLY INSTRUCION
22
1) Remove front panel and main PCB
assembly
①
Remove 2 cap and 2 screw attaching the front panel.
②
Push the front panel left and pull the front panel
forward.
③
Disassemble the protective cover.
④
Disconnect the leads from controller.
23
2) Disassembly of the Noise Filter,
Power Cord, Inlet Valve, Pressure
Switch, and Dispenser Housing.
①
Remove 2 screw attaching the panel on the back.
②
Disassemble the rear panel.
Noise Filter and
Power Cord
①
Remove the two
screws attaching the
noise filter.
②
Disconnect both
connectors in the
noise filter.
Remove the power
cord from the noise
filter.
Inlet Valve
①
Disconnect the
leads from the inlet
valve and remove
three screws.
②
Remove the hoses
and output pipes
from the input
valve.
③
Remove the inlet
valve.
Pressure Switch
①
Disconnect the leads
from pressure switch
and detatch the
pressure switch from
the machine.
②
Disconnect the
pressure tube from
the pressure switch.
Dispenser
Housing
①
Remove the hoses
and output pipes
from the input
valve.
②
Disassemble the
connector pipe and
the dispenser
housing.
24
3) Disassembly of Top Cover and Lid
①
Remove the hinge cover.
②
Remove 6 hinge screw.
③
Pull the hinge to the left and right.
④
Remove the hinge.
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