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