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9. Flow Chart of Troubleshooting
9-1. Power On
' Power On ' does not work
Check the Battery Voltage
is more than 3.4V
C418(VISA) = 2.6V?
Check the Clock at
R418=32KHZ
C400(IOVDD)=1.8V? &
C401(D2VDD) =2.9V?
C426(DCDVDD)
= 1.2V?
Check for the clock at
OSC100 = 26MHz
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 VISA
Resolder OSC400
No
No
Check the related circuit
No
Check the DCDVDD circuit
No
Check the clock generation circuit
( related to 34,35pin at U101 )
9-1
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