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2. SGH-E850 Flow Chart of Troubleshooting
2-
1
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1.Baseband
1. Power ON
Power On does not work
Voltage >= 3.3V
Download again
Charge the Battery
Check U100 and C110
pin#A13 and pin#A14
= 2.8V
Check U100 and C113
Freq = 13MHz ,
Vrms
≥
300mV
and
Vpp
뵃
900mVpp
Check the clock generation circuit
(related to OSC300)
END
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Yes
Check the V bat. Voltage
Check the pin of U100
Check the clock signal at pin#8 of U700
Check the initial operation
Check the current consumption
Current consumption
>=100mA
pin#G11 =
1.8V
pin#J12 >=
2.8V