Samsung Galaxy S7 Edge - Display Problem

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Confidential
Troubleshooting
Display Problem
Step
Check point
Result value
Defect point
1
Confirm the defect symptom
-
-
2
Check the UB connector (HDC9001)
Broken, dust, corrosion
UB connector
(HDC9001)
Loose fitting
Connection
Normal
Go to the next step
3
Replace the UB ass’y
Solved
UB ass’y
Not solved
Go to the next step
4
Connect a UB, and display on with a power
supply
(power supply voltage : 4.0V)
-
-
5
Check the voltage of C90000, C90005
Notice. It should be measured when the display is
activated on
If not the correct value
Display PMIC(U9010)
C90000=3.0V
C90005=1.6V
Go to the next step
6
Check the voltage of following chips
(C9023,C9022,C9027)
Notice. It should be measured when the display
is activated on
If not the correct value
Display PMIC(U9010)
C9023=4.6V
C9022=-1.4~-5.4V
C9027=5.8~7.9V
MAIN CHIP