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7. Flow Chart of Troubleshooting
7-1. Power On
' Power On ' does not work
Check the Battery Voltage
is more than 3.4V
C516(V_ISUP) = 2.7V?
Check the Clock at
R506=32KHZ
C540 (VDD1) = "H"?
C539(VDD2) & C541(VDD3)
= 2.85V?
Check for the clock at C125
= 13MHz
Check the initial operation
END
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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No
Change the Battery
No
Check the PMU related to V_ISUP
No
Resolder X500
No
Check the VDD1 circuit
No
Check the VDD2,VDD3 circuit
No
Check the clock generation circuit
(related to U100)
7-1
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