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9. Flow Chart of Troubleshooting
9-1
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9-1.Baseband
9-1-1. Power ON
'Power On' does not work
Voltage >=3.3V
Download again
Charge the Battery
C133 >= 1.57V
Check U112 & C133
C110=2.9V &
C111=2.8V ?
Check U112 & C134
Freq = 13MHz
Vrms >=480mV
Vpp
≒
1.34V
Check the clock generation circuit
(related to OSC700)
Check the initial operation
END
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
HPEIO = 1.8V
No
Yes
Check the current consumption
Check the Vbat Voltage
Check the U100 & U112
Check the clock signal at pin#19 of U701
Current consumption
>= 100mA
①
②
③
④