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3. Chart of Troubleshooting
3-1.Baseband
3-1-1. Power ON
"Power On" does not work
Check the current consumption
Check current Consumption
I ≥ 100mA ?
Check the battery voltage
C412 ≥ 3.3V ?
Check TP500
voltage level is 2.6V ?
Check U501
C507 ≒ 1.375V ?
C508 ≒ 1.800V ?
C505 ≒ 2.600V ?
C506 ≒ 2.600V ?
C522 ≒ 2.850V ?
Check the
pin#53 of U501
Freq ≒ 19.2MHz?
Vpp ≒ 600mV?
Check the LCD module
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
END
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Binary Download again
Charge the battery again
NO
C412 < 3.3V
Check both Contocon FPCB connected to
SOC400 and BatteryPack
Binary Download again
Resolder or change U501
NO
Check TCXO100
3-1
YES
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