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SGH-S400i Flow Chart of Troubleshooting
2-
7
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2-1-3. Sim Part
Check the voltage at
pin#1 of SIM301 >=
2.8V ?
"Insert SIM is displayed on the LCD
Check the SIM
connector's (SIM301)
connection to SIM card
Check the UCD307
Resolder or change SIM301
END
No
Yes
Yes
Yes
Yes
No
No
Is there any signals
pin#2,#3,#6 of SIM301 ?
Check the UCP201
Check the SIM Card