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3. Flow Chart of Troubleshooting
3-1
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3-1.Baseband
3-1-1. Power ON
'Power ON' Does not work
Check the current consumption
Current consumption
≥
100mA ?
Check the battery voltage
Down load again
Voltage
≥
3.3V ?
Check the pins of U838
C215
≥
1.8V ?
Check the Initial operation
END
C217 and C218 = 2.8V?
Charge the Battery
Check the clock generation circuit
TCX100
Check the clock signal
at pin #3 of TCX100
Freq.=26MHz,Vrms
≥
300mV
Check U838 and C219
Check U838 and C215
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
C219=1.5V?