Lcd On When Close To The Ear During The Call ; Lcd Off When Away From The Ear - Lenovo P70-A Service Manual

Repair Manual of Lenovo P70-A Mobile Phone
4.8 LCD on when close to the ear during the call; LCD off
when away from the ear.
Check whether P-Sensor related circuit is
normal? Or replace p-sensor IC U1502
Whether the touch screen is well
pasted with the shell
Check whether G-SENSOR and touch screen
is normal. If G-SENSOR and touch screen is
normal, I2C is normal, or else, U401 is
abnormal..
Abnormal display of LCD
during the call.
N
N
N
Check U401
Y
Replace the application
Y
of gum of touch screen
and re-paste
20
p-sensor FPC
Problem