
9.
Flow Chart of Troubleshooting
9-
1
9-1 BASEBAND
9-1-1. 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 U300 is more than
1.8V
Check
U300
and
C311
No
Yes
Check
C331 of U304
②
Check VCCD
,VCCD_1.5
of U304=1.5
No
③
Yes
Check VRF of
U300=2.8V
Check
U300
and
C313
No
Yes
④
Check C139
Freq = 13MHz
Vp-p > 0.8V
Check the clock
C139
No
Yes
Check the initial operation
Yes
END
Summary of Contents for SGH-X810
Page 54: ...PCB Diagrams 8 4 ...
Page 56: ...Flow Chart of Troubleshooting 9 2 ...
Page 67: ...Flow Chart of Troubleshooting 9 13 ...
Page 76: ...Flow Chart of Troubleshooting 9 22 ...
Page 80: ...Flow Chart of Troubleshooting 9 26 ...