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