LG KG290 - Page 92

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Only for training and service purposes
4. TROUBLE SHOOTING
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Slide on/off will
work properly
Is there the magnet
in the Slide side?
START
Replace U103
Place the magnet properly.
NO
YES
Voltage at pin 1
of U301 = 2.8V?
YES
NO
Voltage of VMEM at U103
= 2.8V?
NO
Resolder U301
YES
Open Slide.
Voltage at pin 1 of U301
=2.8V
Resolder and U301
NO
YES
Close folder.
Voltage at pin 1 of U301
= 0V
YES
Replace U301
NO
Does it work properly?
YES
Change Main board
NO
CHECKING FLOW