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9. Flow Chart of Troubleshooting
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9-1
9-1. Power On
Check the Battery Voltage
is more than 3.7V
' Power On ' does not work
Change the Battery
END
No
Yes
C319(VISA) = 2.7V?
Check the PMU related to VINT
No
Yes
Check the Clock at
PM300 14pin
(CLK32K)=32KHZ
Resolder OSC301, C315, and C317
No
Yes
C305(+VDD_IO_HIGH) = "H"?
Check the related circuit
No
Yes
+VDD_GSM_CORE
= 1.2V?
Resolder L300
No
Yes
Check the initial operation
Yes
Yes