Samsung SM-G975F Service Manual page 83

8. Level 3 Repair
8-4-5. T-Flash Part
Insert T-Flash card
Is SIM socket ok?
Check the T-flash
(C4025) = 3.0V?
Check the t-flash
CMD /Data/CLK.
(ZD4013,ZD4014, ZD4004)
Is signal ok?
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Yes
No
Yes
No
Voltage.
Yes
No
Yes
No
END
No
Change to the new T Flash card.
If it doesn`t still work T Flash card after
No
changing
the T FLASH, Check the U12003
(Crack etc)
No
Check the UCP5000 (Crack etc)
Replace SIM socket