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Troubleshooting
Display Problem
Step Check point Result value Defect point
1 Confirm the defect symptom - -
2 Check the AMOLED connector (HDC6002)
Broken, dust, corrosion
AMOLED connector
(HDC6002)
Loose fitting Connection
Normal Go to step 3
3 Replace the AMOLED
Solved AMOLED
Not solved Go to step 4
4
Connect a AMOLED, and display on with a
power supply
(power supply voltage : 4.0V)
- -
5
Check the voltage of C6039 = 3.0V
Notice. It should be measured when the display is
activated on
If not the correct value
LDO(U5006)
(VDD_LCD_3P0)
C6039=3.0V Go to step 6
6
Check the voltage of C6038 = 1.8V
Notice. It should be measured when the display is
activated on
If not the correct value
LDO(U6004)
(VDD_LCD_1P8)
C6038=1.8V Go to step 7
7
Check the voltage of following chips
(C6051,C6052,C6050)
Notice. It should be measured when the display
is activated on
If not the correct value
C6041 = +7.6V
C6043 = 4.6V
C6042 = -4.0V
OLED DC DC (U6000)
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