Sim Detect Troubleshooting - LG -P895 Service Manual

4.16 SIM detect Troubleshooting

12. SIM detect Troubleshooting
The sequence of detecting LGP895 SIM is,
SIM inserted to LGP895 -> 3.0V_USIM goes to 3.0V-> Triggers SIM clock, reset and data.
The sequence of detecting LGP895 SIM is,
Block Diagram of USB & UART connection is shown below
SIM inserted to LGP895  3.0V_USIM goes to 3.0V Triggers SIM clock, reset and data.
Block Diagram of USB & UART connection is shown below
USIM
Start
Re-insert the SIM card
Work well?
3.0V_SIM runs?
Change SIM card
Work well?
Change Main board
LGE Internal Use Only
USIM_CLK
CLK
CC_CLK
USIM_RESET
RST
CC_RST
USIM_DATA
I_O
CC_IO
START
Re-insert the SIM card
Yes
Work well?
No
NO
3.0V_SIM runs?
YES
Change SIM card
Yes
Work well?
No
Change The main board
XMM6260
End
Yes
Change the main
No
board
No
Change The main
board
Yes
Yes
End
No
- 101 - Copyright © 2012 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
END
END
Only for training and service purposes