2. SGH-X461
Flow Chart of Troubleshooting
2-1
2-
1. Baseband
2-1-1. Power ON
check the current
consumption
>= 100mA
Download again
'Power ON' does not work
No
Yes
Yes
END
Yes
Check the Initial Operation
Yes
Charge the battery
No
Check the Voltage
of the Battery
>= 3.3V
check keypad
No
Check the pin C212,
C213,C214, C215
of U200 is
>=2.8V
Check
"Power On"
key?
No
check
U100
and
C100
Yes
1
Check the clock signal at
pin #1 of U802
Freq=26Mhz,
Vrms >=300mV
No
Check the clock generation
circuit U802
Yes
2
Содержание SGH-X461
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