Chart Of Troubleshooting - Samsung SGH-U900 Service Manual

10. Flow Chart of Troubleshooting
10-1-1. Power ON
'Power On' does not work
Check the current consumption
Current consumption
>= 100mA
Check the Vbat Voltage
Voltage >=3.3V
Pin #3 of D400 is high?
Check the PMIC output
voltage
(C419,C420,C422,C414,
C426,C415)
Check Pin#3 of TCX200
is 19.2MHz?
Check the initial operation
END
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
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Charge the Battery
Check D400
Check U400
Check the clock generation circuit
(related to TCX200)
10-1