LG LTCS20020 Series Service Manual page 40

6) Refrigerator Room LED Module doesn't work
No
1.- Unplug connector from CON8.
4
2.- Check resistance in wires Gray to
Gray.
Plug in CON8, check voltage in wires
5
Gray to Gray,
Check voltage in wires
6
CON8
Check voltage in Refrigerator LED
7
Connector
Checking Flow
Red to Black from
Result & SVC Action
Status Result
0
Normal
Other
Infinity
Push
S/W
Other
Status Result
5 V
Closed
Other
0 V
Open
Other
Status Result
12 V
Closed
Other
0 V
Open
Other
Status Result
12 V
Open
Other
0 V
Closed
Other
40
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SVC Action
Go to the 3
Change door S/W
Go to the 3
Change door S/W
SVC Action
Normal
Change the PCB
Go to the 4
Change the PCB
SVC Action
Normal
Change the PCB
Normal
Change the PCB
SVC Action
Change Freezer LED
Change the PCB
Normal
Change the PCB