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3. TROUBLE SHOOTING
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Only for training and service purposes
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3.11 Touch Sensor Trouble Shooting
START
Reconnect Touch Module CN72000
Change Main Board
Check Power
LDO3v0_ (C7201)
Power is OK?
Touch Woks OK ?
Yes
Yes
Yes
Yes
Yes
Check Power
+1V8_VREG_L14 (C7200)
Power is OK?
Check I2C Line & Signal Line (R2202 &R2203)
Touch Works OK?
Change Touch IC(U7200)
Touch Works OK?
No
No
No
No
No
END
Change TOUCH LDO (U4134)
Change PM8110(U4100)