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5-2
SGH-A400 Flow Chart of Troubleshooting and Circuit Diagram
5-2 SGH-A400 Initial
N
Initial Failure
Y
Y
Check the “Reset_B”
signal at the pin 6 of
U8016 is “High”
Check the U100 (IA)
N
Y
Check the pin 10
of U400 is “High”
Check the U201 (M46)
N
Y
Check the pin 11 of U400
is “High”
Check the U400 (PMIC)
Y
Check the connections and
initialization using Factory
Test Program
END
Y
Check LCD connector CN601,
and resolder bridge
