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2. SGH-S341i Flow Chart of Troubleshooting
1.Baseband
1. Power ON
'Power On' does not work
Check the current consumption
Current consumption
>= 100mA
Check the Vbat Voltage
Voltage >=3.3V
Check the pin of U102
Pin#J12 >= 2.8V
Pin#A13 and pin#14
=2.8V
Yes
Check the clock signal at pin#27 of U501
Freq = 13MHz
Vrms >=300mV
Vpp≒ 900mV
Check the initial operation
END
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
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Charge the Battery
Check U102 and C128
No
pin#G11 =
1.5V
= 1.8V
Check the clock generation circuit
(related to osc501)
2-1
Check U102 and C129
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