LG LG-P970 - Side Key Trouble Shooting

4. TROUBLE SHOOTING
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Only for training and service purposes
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TP1_R111
(SUB FPCB) goes low when
the key is pressed?
No
LOWER FPCB damaged?
START
Change the Main board
Yes
No
Side Key is worked?
No
Press the key
Yes
END
END
Change LOWER FPCB
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[2](Gesture KEY) goes low
Block Diagram of Side key connection is shown below
TWL5034
KPD_R0
KPD_R1
KPD_R2
KPD_C0
KEY_R[0]
KEY_R[1]
KEY_R[2]
KEY_C[0]