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