LG LFXS30786 Series, Service Manual

Page: 67 / 118

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Refrigerator room lamp doesn’t work
1
Yes
No
Explain to
customer
2
Check the door S/W resistance.
Is it correct compared with table?
No
Yes
Change the
Door S/W
The Switch senses if the door is
open or close.
When the door open, lamp On
When the door Close, lamp Off
Resistance [Ω]
Door S/W
No magent near
the switch
Infinity
Magnet is near
the switch
0
Check the PCB Voltage.
Is CON6 28 th pin & 30 th pin
voltage 11.4~12.6V?
(While door open)
No
Yes
CON6
Change the
PCB
3
5
No
Yes
Top LED Lamp
Change the LED Lamp
Check the LED Lamp voltage
Is voltage 11.4 ~ 12.6V?
(While door open)
Check LED
Lamp
Connection
6
4
Check the PCB Voltage.
Is CON6 28 th pin & 30 th pin
voltage 0~2V? (While door
closed)
No
Yes
CON6
Change the
PCB
Side LED Lamp