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5. SGH-S108 Flow Chart of Troubleshooting
5-
1
1. Power ON
Current consumption
>=100mA
' Power On ' does not work
Voltage >= 3.3V
Download again
Charge the Battery
pin#15 >=
2.8V
Check U100 and C113
pin#46 and pin#39 =
2.8V
Check U100 and C112
Freq = 13MHz ,
Vrms ≥ 300mV
and
Vpp
ㆃ
900mVpp
Check the clock generation
circuit
(related to OSC801 and U801)
END
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
pin#13 = 1.8V
No
Yes
Check the V bat. Voltage
Check the pin of U100
Check the clock signal at pin#4 of
U801
Check the initial operation
Check the current consumption