Samsung X200 - SGH Cell Phone Service Manual page 6

2-1-2. Initial
Initial Failure
check the pin
RSTB of U201 is
LOW?
check the pin CKI
of U201 is 13Mhz?
Check the clock signal
at pin #3 of OSC100
Freq=26Mhz?
Check the pin #9 of U102
is HIGH and pin #11,
#13 is 2.9V?
Check the Initial Operation
END
Yes
Yes
Yes
Yes
Yes
SGH-X200 Flow Chart of Troubleshooting
No
Check U201
Check
No
R177,R178,R131,C127
No
check
No
Check u107
2-3
1
2
3
OSC100
4