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2. SGH-E530 Flow Chart of Troubleshooting
2-1.Baseband
2-1-1. Power ON
'Power On' does not work
Current consumption >= 100mA
Check the Vbat Voltage of C551
Voltage >=3.3V
Check the pin of U401
Pin#J12 >= 2.8V
Pin#A13, A14 =2.8V
Freq = 13MHz
Vrms >= 300mV
Vpp
at the pin#27 of U102
Check the initial operation
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Yes
Yes
Yes
Yes
≒ 900mV
Yes
END
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No
Binary re_download
No
Charge the Battery
No
Check U401 and C422
No
pin#G11 = 1.5V
Yes
No
Check the clock generation circuit
(related to OSC100)
2-3
No
Check U401 and C442
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