Trouble Treatment; Maintainability Requirement; Trouble Shooting - AOC 931SW series Service Manual

Service Manual

8.Trouble treatment

8.1 Maintainability Requirement

1. Voltmeter. & digital multimeter
2. Oscilloscope.
3. Pattern Generator.
4. DDC Tool with Compatible Computer.
5. Alignment Tool.
6. LCD Color Analyzer.
7. Service Manual.
8. User Manual.
9. repair tools etc

8.2 Trouble Shooting

Main Board---
No Power
No power
Press power key and look if
the picture is normal
NG
Please reinsert and make sure the AC
100-240V is normal ?
OK
Check 5V-CN404, 3.3V-U404-2;
1.8V-Q409/Q410,Panel-Vcc-Q405
OK
Check X401 waveform
OK
Replace U402/U401
NG
Reinsert or check the power section
NG
Check&replace
CN404,U404,Q409,Q410,Q405
NG
Replace X401
27
AOC 931SW+
Check flow chart
For the no power