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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
4.16 SIM Detect Troubleshooting
[UG{
USIM Initial sequence of LG-E900 is :
SIM_CLK,SIM_RST,SIM_IO triggered
Æ
VRUIM_2.85V go to 2.85V
Æ
SIM IF work
Test point
Net name
Voltage level
TP1
VREG_RUIM_2.85V
1.8V or 2.85V
TP2
SIM_CLK
1.8V or 2.85V clock
TP3
SIM_RST
1.8V or 2.85V
TP4
SIM_IO
1.8V or 2.85V any signal
Start
Work well?
TP1 is 2.85V?
TP2~4 is run?
Change the Main board
End
Check J701
Yes
No
YES
NO
Re-insert the SIM card
Change SIM card
Work well?
End
Yes
No
Содержание E900
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