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7. SGH-C200 Flow Chart of Troubleshooting
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7-1
1. Power On
Current consumption
>=100mA
The set is not ' Power On '
Voltage >= 3.3V
Download again
Charge the Battery
pin#J12 of U100 >= 2.8V
Check U100 and C115
pin#A13 of U100 = 2.8V
Check U100 and C116
Check the clock signal
at pin#3 of OSC900
Freq = 13MHz ,
Vrms ≥ 300mV
Check the clock generation circuit
(related to OSC900)
END
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
pin#G11 = 1.8V
No
Yes
Check the +VBATT Voltage
Check the pin of U100
Check the initial operation
Check the current consumption
