Poor Cooling In The Refrigerator Compartment - LG LFX28977ST/01 Service Manual

Poor cooling in the refrigerator compartment

Compressor
Check the compressor
Refer to page 51
No
Enter the TEST 1 MODE
Yes
Is the voltage between pins 3
and pin 4 of CON4 like as
below?
Pin3 BL/WH
Pin4 GY
CON4
Voltage of R-fan
Test Point
pin3 To pin4
Yes
Feedback check.
Is the voltage between Pin 4
and pin 5 of CON4 like as
below?
Pin4 GY
Pin5 YL/BK
CON4
Feedback voltage of R-fan
Test Point
pin4 To pin5
Yes
- 47 -
Replace
No
MAIN PWB
(Position
No : 500A)
Result
12 ~ 16 V
Replace
No MAIN PWB
(Position
No : 500A)
Result
1 ~ 4 V