Flow Chart Of Troubleshooting - Samsung SGH-T619 Service Manual

9. Flow Chart of Troubleshooting

9-1. Power On
' Power On ' does not work
Check the Battery Voltage
C406(VINT) = 2.7V?
Check the Clock at
C425(+VDD_IO_LOW) &
C424(+VDD_IO_HIGH) = "H"?
TA507(+VDD_GSM_CORE)
Check for the clock at C114
Check the initial operation
Yes
is more than 3.4V
Yes
Yes
R401=32KHZ
Yes
Yes
= 1.875V?
Yes
= 26MHz
Yes
Yes
END
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No
Charge the Battery
No
Check the PMU related to VINT
No
No
Check the related circuit
No
Check the +VDD_GSM_CORE circuit
No
Check the clock generation circuit
(related to OSC100)
9-1
Resolder OSC400