Touch Sensor Trouble - LG -P715 Service Manual

4.18 Touch sensor Trouble

Touch control signals are generated by touch sensor. Those signal's path is :
Touch window -> Touch Sensor -> MSM7627A
LGE Internal Use Only
START
Disconnect and reconnect
Touch sensor connector
Touch key sensing OK?
Change the upper assy.
[Touch Module]
Touch sensing OK?
Yes
Check VREG_TOUCH_3.0V
(TP1) is OK?
Reball or change U4007,C4051
Touch sensing OK?
Change the Main BD
The touch works
END
Yes
No
Yes
No
No
Yes
No
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4. TROUBLE SHOOTING
Only for training and service purposes