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9-
1
This Document can not be used without Samsung's authorization
9. Flow Chart of Troubleshooting
9-1.Baseband
9-1-1Power ON
Check the Battery Voltage
is more than 3.4V
' Power On ' does not work
Change the Battery
END
No
Yes
C425
(VINT) = 2.55V?
Check the PMU related to VINT
No
Yes
Check the Clock at
OSC400
=32KHZ
Resolder OSC400
No
Yes
C418
(VDD_IO_LOW_1.8V) &
C412
(VDD_IO_HIGH_2.9V) =
"H"?
Check the related circuit
No
Yes
L402
(VDD_GSM_CORE_1.2V)
= 1.2V?
Check the VDD_GSM_CORE_1.2V
circuit
No
Yes
Check for the clock at
TCX100
= 26MHz
Check the clock generation circuit
(related to TCX100)
No
Yes
Check the initial operation
Yes
Yes
Содержание SGH-P270
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