Side Key Trouble Shooting - LG -P970 Service Manual

4.16 Side Key Trouble shooting

The sequence of detecting LGP970 Side key is,
Side key pressed on LGP970 → KEY_R[0](Volume up), KEY_R[1](Volume_down), KEY_R[](Gesture KEY) goes low
Block Diagram of Side key connection is shown below
KEY_R[0]
KEY_R[1]
KEY_R[]
KEY_C[0]
START
Press the key
Side Key is worked?
No
TP1_R111
(SUB FPCB) goes low when
the key is pressed?
No
LOWER FPCB damaged?
No
Change the Main board
LGE Internal Use Only
TWL5034
KPD_R0
KPD_R1
KPD_R
KPD_C0
Yes
END
END
Yes
Change LOWER FPCB
- 168 -
4. TROUBLE SHOOTING
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes