2. SGH-E910
Flow Chart of Troubleshooting
2-
1
2-1 BASEBAND
2-1-1. Power ON
'Power On' does not work
Yes
Check the current
consumption more
than 100mA
Download again
No
Yes
Charge the Battery
Check the VBAT
more than 3.3V
No
Yes
①
Check the
VLDO7_1.8V
of U301 is more than
1.8V
Check
U301
and
C310
No
Yes
Check
C315 and U301
Check
C343 and U304
②
Check VCCD_1.5 of
U304=1.5V
No
③
Yes
Check VRF of
U301=2.9V
Check
U301
and
C314
No
Yes
④
Check C115
Freq = 13MHz
Vp-p > 0.8V
Check the clock
C115
No
Yes
Check the initial operation
Yes
END