LG LG-K430DSF - 3.12 Checking Touch Block

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3. TROUBLE SHOOTING
3.12 Checking Touch Block
The Touch control signals are generated by MT6753. It is assembled with LCD.
Checking Flow
Image
TP1
TP3
TP2
TP4
TP5
Change Main Board
Start
Reconnect Touch Module connector
(CN5001)
Touch Woks
OK ?
Yes
No
No
Check Power
(TP1~TP2)
Power is OK?
Yes
Check I
2
C Line &
Signal Line
(TP3~TP5)
Touch Works OK?
No
Yes
Check Touch
Module Connector
Touch Works OK?
No
Change Font A’ssy
Yes
No
Touch Woks
OK ?
Yes
End