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
