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4.11 SIM Detect Troubleshooting
USIM Initial sequence of U370 is :
USIM_CLK,USIM_RST,USIM_DATA triggered → VREG_UIM_2.85V go to 2.8V → USIM IF work
Re-insert the SIM Card
Check VREG_USIM_2.85V &
Change the SIM card
Change the Main board
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Only for training and service purposes
Start
Work Well ?
NO
USIM_P_CLK is run
YES
Work well ?
NO
- 93 -
4. TROUBLE SHOOTING
YES
END
NO
Check J300 ( USIM Connector)
YES
END
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Table of Contents
Troubleshooting
