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8. Level 3 Repair
8-4-5. SIM/SD PART
Check the signals
T-FLASH CMD / DATA / CLK
(ZD4020, ZD4016, ZD4015)
Are there any problems?
Check if the SIM socket
has damaged
Check the voltage of
C4034 = 3.0V
END
Replace the SIM Socket
Yes
SD Card does not work
Check UCP5000 (Crack etc)
Yes
No
Yes
Change the SD Card.
and check U12019 (Crack etc)
Abnormal
No