Flow Chart Of Troubleshooting - Samsung SGH-X495 Service Manual

7. Flow Chart of Troubleshooting

7-1. Power On
' Power On ' does not work
Check the Battery Voltage
is more than 3.4V
C315(V_ISUP) = 2.7V?
Check the Clock at
R306=32KHZ
C340 (VDD1) = "H"?
C339(VDD2) & C338(VDD3)
= 2.85V?
Check for the clock at C135
= 13MHz
Check the initial operation
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
END
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
No
Change the Battery
No
Check the PMU related to V_ISUP
No
Resolder X300
No
Check the VDD1 circuit
No
Check the VDD2,VDD3 circuit
No
Check the clock generation circuit
(related to U101)
7-1