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Level 3 Repair
8-22
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8-3-1-10 SIM Card Working
Insert & Operate
SIM card
SIM FPCB ASS'Y
is connected in
SIM400 correctly?
Check SIM400, TR400, UCP300
& Neighboring Circuits
Connect correctly
Change SIM400
Change SIM FPCB ASS'Y
NG
Check the SIM400
(short, open, etc)
NO
NO
NO
Check the
SIM FPCB ASS'Y
(crack, short, etc)
Check the TR400 or
Change the U401(PMIC)
Check the voltage
C464 = 3.0V ?
NO
Yes
Yes
Yes
Yes