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3-1
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3. Chart of Troubleshooting
3-1.Baseband
3-1-1. Power ON
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
END
Binary Download again
Resolder or change U501
Check TCXO100
YES
YES
YES
NO
NO
NO
"Power On" does not work
Check the current consumption
Check current Consumption
I
≥
100mA ?
Check the battery voltage
C412
≥
3.3V ?
Binary Download again
Charge the battery again
Check both Contocon FPCB connected to
SOC400 and BatteryPack
YES
YES
YES
NO
NO
C412 < 3.3V
YES
NO