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9. Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-1
9-1. Power On
Yes
Yes
Check the initial operation
Yes
No
Check the clock generation circuit
(related to
U101
)
Check for the clock at
C319
= 26MHz
Yes
No
Check the +VDD_GSM_CORE circuit
C401
(+VDD_GSM_CORE)
= 1.9V?
Yes
No
Check the related circuit
TA425
(+VDD_IO_LOW) &
C424(
+VDD_IO_HIGH) = "H"?
Yes
No
Resolder
OSC400
Check the Clock at
R401
=32KHZ
Yes
No
Check the PMU related to VINT
C408
(VINT) = 2.7V?
Yes
No
END
Change the Battery
' Power On ' does not work
Check the Battery Voltage
is more than 3.4V