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4. TROUBLE SHOOTING
CHECKING FLOW
Check supply voltage of U301
C322, C320 (TP01~02)
Check I2C signal of U102
R123, R124 (TP03~04)
ZD306~309 (TP05~08)
LGE Internal Use Only
START
Yes
Yes
Check touch signal
Yes
Check CN304 and
touch pannel
contact
Yes
Resolder CN304 or
replace touch
pannal
Yes
Touch will work
properly
2. TROUBLE SHOOTING
Resolder or Replace
U102
No
Resolder or Replace
U301
Contact well CN304
No
and touch pannel
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