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