Samsung SM-A320F Svc Manual page 21

Troubleshooting
Display Problem
Step
1 Confirm the defect symptom
2 Check the AMOLED connector (HDC7002)
3 Replace the AMOLED
Connect a AMOLED, and display on with a
4 power supply
(power supply voltage : 4.0V)
Check the voltage of C7013 = 3.0V
5
Notice. It should be measured when the display is
activated on
Check the voltage of C7015 = 1.5V
6
Notice. It should be measured when the display is
activated on
Check the voltage of following chips
(C7012,C7026,C7049)
7
Notice. It should be measured when the display
is activated on
Check point
- This document cannot be used without Samsung's Authorization -
Result value
-
Broken, dust, corrosion
Loose fitting
Normal
Solved
Not solved
-
If not the correct value
C7013=3.0V
If not the correct value
C7015=1.5V
If not the correct value
C7012 = 7.0V
C7026 = -1.4 ~ -4.4V
C7049 = 4.6V
Defect point
-
AMOLED connector
(HDC7002)
Connection
Go to the next step
AMOLED
Go to the next step
-
PMIC(U5004)
Go to the next step
U5004
Go to the next step
U7001
MAIN CHIP
Confidential