LG LSC27914SB - Page 115

20) Refrigerator apparently doesn’t work
CHECKING FLOW RESULT & SERVICE ACTION
Check voltage signals of 12 Vdc and 16 Vdc.
NO.
8
7
6
16 V signal
NOTE: If refrigerator is not starting to cooling after
some minutes, refer to Poor Cooling section.
12 V signal
Result
Service Action
16V
signal
Go to test 12V signal
15.5~16.5 Vdc
Other
Replace PCB
go to Step 7
11.7~ 12.3 Vdc
Replace PCB
12V
signal
Other
Execute Test Modes anc check voltages in CON 1
and CON 2 as is shown in the pictures.
Check 5 V signal voltage.
CON 1 CON 2
Result
Service Action
16V
signal
Normal, go to Step 8
4.75~5.25 Vdc
Other
Replace PCB
Result
Service Action
Normal
110~127Vac
Other
Replace PCB
Normal
0~5 Vac
Other
Replace PCB
0~5 Vac
Normal
Replace PCB
Other
TEST
MODE 1
TEST
MODE 2
CON 2
CON 1
CON 1
CON 2
110~127Vac
Other
Normal
Replace PCB
- 114 -