LG LG-P970 Service Manual

4. TROUBLE SHOOTING
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Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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4.15 SIM detect Trouble shooting
The sequence of detecting LGP970 SIM is,
SIM inserted to LGP970 Æ 2.85V_SIM goes to 2.85V(SUB FPCB) Æ Triggers SIM clock, reset and data.
Block Diagram of USB & UART connection is shown below
I_OG
RSTG
CLKG
USIMG
SIM_CLKG
SIM_RSTG
SIM_IOG
MP-EHMG
XMM6160
CC_RST
CC_CLK
CC_IO
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Change SUB FPCB
Work well?
Yes
No
Work well?
START
Change Main board
Yes
No
END
Work well?
No
Re-insert the SIM card
Yes
END
2.85V_SIM (TP1_C214) runs?
Yes
No
Change the main board
END
Change SIM card
4.15 SIM detect Trouble shooting

LG LG-P970 Specifications

General

Brand	LG
Model	LG-P970
Category	Cell Phone
Language	English