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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
Voltage >=3.3V
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Charge the Battery
Pin#J12 >= 2.8V
Check UCP301 and C313
Pin#A13 and pin#A14
=2.8V
Check UCP301 and C314
Freq = 26MHz
Vrms >=300mV
Vpp
900mV
Check the clock generation circuit
(related to OSC101)
Check the initial operation
END
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
pin#G11 = 1.8V
No
Yes
Check the current consumption
Check the Vbat Voltage
Check the pin of UCP301
Check the clock signal at pin#30 #31 of U101
Current consumption
>= 100mA
Freq = 13Mz
Check the clock signal at pin#8 of U101
Yes
Check U101
No