LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 89 -
4.10 SIM Detect Troubleshooting
USIM Initial sequence of CU575 is :
USIM_CLK,USIM_RST,USIM_DATA triggered
→
VREG_USIM_2.85V go to 2.8V
→
USIM IF work
Start
Work well?
VREG_USIM_2.85V is 2.85V?
USIM_P_CLK is run?
Change the main board
End
Check CON401
YES
No
YES
NO
Re-insert the SIM card
Change SIM card
Work well?
End
YES
No