Samsung Galaxy Note 3 SM-N900 No Service, No Network Solution Schematic, Diagram , Circuit



Samsung Galaxy Note 3 SM-N900 No Service, No Network Solution Step by Step 


Step 1

No service

Check memu setting
Menu → applications → setting → wireless and network →
mobile networks → network mode → setting is auto mode ?

Step 2


Menu → Phone → Keypad →
*#1234# → check Phone version →
PHONE : N900XXXX or
PHONE : unknown

Check the contact of antenna.
(Sub FPCB)

Step 3

Check the CP V_BAT
L300,L301,L302,C300 = 3.6~4V

Replace the L300,L301,L302,C300

Step 4

Check the CP_VSD1_, CP_VSD2_
CP_VSD1 (C352) =0.9~1.4V
CP_VSD2 (C353) = 1.8V

Replace the UCP300

Step 5

Change the board

END





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