Service Excellence Beyond Imagination
SWA-CS Content Innovation
Touch problem
Step
Check point
Result value
Defect point
1
Confirm the defect symptom
-
-
2
Check the LCD connector (HDC600)
Broken, dust, corrosion
LCD connector
(HDC600)
Normal
Go to the next step
3
Check the TSP connector on LCD module.
Broken, dust, corrosion
TSP connector
Normal
Go to the next step
4
Replace the TSP
Solved
TSP
Not solved
Go to the next step
5
Connect a LCD and display on with a power
supply (power supply voltage : 3.8V)
-
-
6
Check the voltage of following chips
(C604,C433)
Notice. It should be measured when the
display is activated on
If not the correct value
C604-> LDO(U605)
C433 -> PMIC(U401)
C604 = 2.8V
C433 = 1.8V
Go to the next step
7
Check the Signal of following chips
(R601,R602)
Notice. It should be measured when the
display is activated on
If not the correct value
R601,R602
Same signal compared with a
good PBA
MAIN CHIP or PBA