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2. SGH-E880 Flow Chart of Troubleshooting
2-
11
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2-1.Baseband
2-1-1. Power ON
'Power On' does not work
Voltage >=3.3V
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Charge the Battery
C113 >= 1.8V
Check U100 and C113
Check U100 and C118
Freq = 13MHz
Vrms >=300mV
Vpp
≒
900mV
Check the clock generation
circuit
(related to OSC700)
Check the initial operation
END
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
C118 = 1.5V
No
Yes
Check the current consumption
Check the Vbat Voltage
Check the pin of U100
Check the clock signal at pin#6 of OSC700
Current consumption
>= 100mA
C116 and C117
=2.8V