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SGH-X400 Flow Chart of Troubleshooting
2. Initial
Initialization Failure
Check the signal at the
pin 19 of U102 is "High"
when the phone is boot
Check the pin 26 of
U102 is "High"
Check the pin 4 of
OSC801 is around 2.8V
Check LCD connector CN201,
and resolder bridge
Yes
on
Yes
Yes
Yes
Yes
END
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No
No
Check the U701
No
Check the soldered status of
OSC801,R801,U102
4-2
Check U102
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