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8. Level 3 Repair
8-4-4. SIM PART
Check the signals
SIM RST / IO / CLK
(SIM1 : ZD4008, ZD4011, ZD4009)
(SIM2 : ZD4005, ZD4007, ZD4006)
Are there any problems?
Check if the SIM socket
has damaged
Check the voltage of
C4036, C4041 = 1.8V or 3.0V
END
Replace the SIM Socket
Yes
SIM Card does not work
Change SIM Card
And check U8015 and U12019
Check UCP5000 (Crack etc)
Yes
No
Abnormal
Yes
No