LG LRSXC2706 Series Service Manual page 62

Refrigerator room lamp doesn't work
1
Check the Freezer door switch.
Does it feel sticky?
No
2
Check the door S/W resistance.
Is it correct compared with table?
Door S/W
Resistance [Ω]
Door S/W
Door Close
Yes
3
Check the PCB Voltage.
Is CON4 23th pin ~ 24th
pin voltage 12V?
INSPECTION
DOOR
POINT
Close
CON4
23 pin ~ 24 pin
th th
Open
Yes
4
Change the
Yes
Door S/W
Check the LED Lamp voltage.
Is it 0~2V? (While door closed)
Change the
No
Door S/W
5
Check the LED Lamp voltage.
Is it 12V? (While door open)
6
Explain to customer
0
Change the
No
PCB
Voltage [V]
0~2V
12V
62
No
Yes
No
Yes
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Change the
Door S/W
Change the
LED Lamp