4. TROUBLE SHOOTING
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Re-insert the SIM card
Work well?
END
Yes
No
Change Main
TP1 2.9V_USIM(C1228)runs?
Change the main board
No
Yes
Work well?
END
Yes
START
Change SUB
Work well?
END
Yes
No
Change SIM card
No
4.14 SIM detect Trouble shooting
The sequence of detecting LG-P768 SIM is,
SIM inserted to LG-P768 -> 2.9V_USIM(C1228) goes to 2.9V -> Triggers SIM clock, reset and data.
Block Diagram of USB & UART connection is shown below
4.15 SIM detect Trouble shooting
The sequence of detecting LG-P760 SIM is,
SIM inserted to LG-P760
2.9V_USIM(C1228) goes to 2.9V
Triggers SIM clock, reset and data.
Block Diagram of USB & UART connection is shown below
TP1
TP3
I_O
RST
CLK
USIM
USIM_CLKK
USIM_RESET
USIM_DATA
MP-EHM
XMM6260
CC_IO
CC_CLK
CC_RST
Start
Re-insert the SIM card
Work well?
End
Yes
No
NO
Change the main
board
2.9V_USIM (C1228) runs?
YES
Change SUB
Work well?
End
Yes
No
Change SIM card
Yes
No
End
Work well?
Change Main