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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
Check the Battery Voltage
is more than 3.4V
' Power On ' does not work
Change the Battery
END
No
Yes
C314(V_ISUP) = 2.7V?
Check the PMU related to V_ISUP
No
Yes
Check the Clock at
R302=32KHZ
Resolder X300
No
Yes
C339 (VDD1) = "H"?
Check the VDD1 circuit
No
Yes
C338(VDD2) & C337(VDD3)
= 2.85V?
Check the VDD2,VDD3 circuit
No
Yes
Check for the clock at C142
= 13MHz
Check the clock generation circuit
(related to U100)
No
Yes
Check the initial operation
Yes
Yes
Summary of Contents for SGH-X656
Page 41: ...8 PCB Diagrams 8 1 ...
Page 42: ...PCB Diagrams 8 2 ...