Samsung SGH-T429 Bedienungsanleitung PDF herunterladen (Seite 33)

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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

Yes

C323(VISA) = 2.7V?

Check the PMU related to VINT

Yes

Check the Clock at

R308=32KHZ

Resolder OSC300

Yes

C303(+VDD_IO_LOW) &

C305(+VDD_IO_HIGH) = "H"?

Check the related circuit

Yes

C329(+VDD_GSM_CORE)

=1.8V?

Check the +VDD_GSM_CORE circuit

Yes

Check for the clock at C125

=26MHz

Check the clock generation circuit

(related to U101)

Yes

Check the initial operation

Yes

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Samsung SGH-T429 Bedienungsanleitung Seite 33