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10. Flow Chart of Troubleshooting
10-
1
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10-1.Baseband
10-1-1. Power ON
'Power ON' Does not work
Check the current consumption
Current consumption
≥
100mA ?
Check the V bat. voltage
Down load again
Voltage
≥
3.3V ?
Check the pins of U402
C115
≥
1.8V ?
Check the Initial operation
END
C119 and C112 = 2.8V?
Charge the Battery
Check the clock generation
circuit (TCX401, U400, U401)
Check the clock signal
at pin #6 of U401
Freq.=13MHz,Vrms
≥
300mV
Check U402 and C114
Check U402 and C115
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
C114=1.5V?