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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 3.4V
' Power On ' does not work
Change the Battery
END
No
Yes
C323(VISA) = 2.7V?
Check the PMU related to VINT
No
Yes
Check the Clock at
OSC300=32KHZ
Resolder OSC300
No
Yes
C303(+VDD_IO_LOW) &
C304(+VDD_IO_HIGH) = "H"?
Check the related circuit
No
Yes
C327(+VDD_GSM_CORE)
= 1.8V?
Check the +VDD_GSM_CORE circuit
No
Yes
Check for the clock at C123
= 26MHz
Check the clock generation circuit
(related to U100)
No
Yes
Check the initial operation
Yes
Yes
Содержание SGH-L310
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