Samsung SGH-X461 Service Manual page 6

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SGH-X461 Flow Chart of Troubleshooting
2-1-2. Initial
Initial Failure
check the pin
1
No
RSTB of U600 is
Check U600
LOW?
Yes
2
Check
No
check the pin CKI
of U600 is 13Mhz?
R801,R802,C813,C815
Yes
Check the clock signal
3
No
check
at pin #3 of U802
U802
Freq=26Mhz?
Yes
Check the pin #9 of U600
4
No
is HIGH and pin #11,
Check U100
#13 is 2.9V?
Yes
Check the Initial Operation
Yes
END
2-3

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