Samsung Galaxy Grand 2 Repair Manual page 59

Display Problem
Step
1 Confirm the defect symptom
2 Check the LCD connector
3 Replace the LCD
Connect a LCD and display on with a power
4 supply
(power supply voltage : 3.8V)
Check the voltage of C606 = 1.8V
5
Notice. It should be measured when the display is
activated on
Check the voltage of C602 > 18V
6
Notice. It should be measured when the display is
activated on
Check the voltage of following chips
(C607,C605)
7
Notice. It should be measured when the display is
activated on
Service Excellence Beyond Imagination
Check point Result value
-
Broken, dust, corrosion
Insert status
Normal
Solved
Not solved
-
If not the correct value
C606=1.8V
If not the correct value
C602>18V
If not the correct value
C607 = 5V
C605 = -1.5 ~ -5V
Defect point
-
LCD connector
(HDC600)
Go to the next step
LCD
Go to the next step
-
PMIC(U401)
Go to the next step
Back light IC(U608)
Go to the next step
U601(panel power
supplier)
MAIN CHIP
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