Samsung Galaxy Grand 2, Руководство по ремонту

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