Table of Contents
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3. Flow Chart of Troubleshooting
3-1.Baseband
3-1-1. Power ON
'Power On' does not work
Check the current consumption
Current consumption
>= 100mA
Check the Vbat Voltage
Voltage >=3.3V
Check the pin of U100
Pin#D6 >= 2.8V
Pin#E14 and
pin#F3>=2.8V
③
Check the clock signal at R404
Freq = 26MHz
Vrms >=300mV
Vpp ≒ 900mV
Check the initial operation
END
Yes
No
Yes
No
Yes
①
No
Yes
No
Yes
No
Yes
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Charge the Battery
Check U100 and C117
pin#A6 = 1.8V
Yes
④
Check the clock generation circuit
(related to 3pin of TCX400, C404, R402)
3-1
①
No
Check U100
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Table of Contents
Troubleshooting
