LG LFX28977ST/01 Service Manual page 46

Is the voltage between
pin 1 and pin2 of
Refrigerator LED Module
Housing?
Pin1 RD Pin2 BK
Voltage of Refrigerator LED
Door Test Point
Don't care pin1 To pin2
Yes
Is the connection loose?
CON5
No
1.Check the
No
harness open
or short
2.replace R
LED Module
Result
12 V
Reconnect
Yes
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Is the voltage between pin 1
and 3 of CON5 like as below?
CON5
Pin1 BL/WH Pin3 WH/RD
Voltage of Door S/W Signal
Door Test Point
Don't care pin1 To pin3
Yes
Is the voltage between
pin 2 and pin3 of
Refrigerator LED Module
Housing?
Pin2 BK Pin3 BL
Voltage of Door S/W Signal
Door Test Point
Close pin2 To pin3
Open pin2 To pin3
Yes
Replace R LED Module
(Position No : 409D)
Replace
No
MAIN PwB
(Position No
: 500A)
Result
12 V
1.Check the
No
harness open
or short
2.replace R
LED Module
Result
0 V
12 V