Samsung SGH-E800 Service Manual page 25

7. SGH-E800 Flow Chart of Troubleshooting
1. Power On
' Power On ' does not work
Check the Battery Voltage
is more than 3.4V
C412(V_ISUP) = 2.7V?
Check the Clock at
R402=32KHZ
C433(VDD1) = "H"?
C432(VDD2) & C431(VDD3)
= 2.8V?
Check for the clock at C139
= 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 X400
No
Check the VDD1 circuit
No
Check the VDD2,VDD3 circuit
No
Check the clock generation circuit
(related to OSC101)
7-1