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SGH-E770 Flow Chart of Troubleshooting
2-1-3. Sim Part
"Insert SIM" is displayed on the LCD
The voltage is 2.8V at the pin #1 of ZD307?
NO
Check the UCP301
YES
Is there any signal pin #2,3,4 of ZD307 ?
YES
Check the SIM Card
M
b o
h lc i
ips
NO
Check the UCP301 & UCP201
END
2-7
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