Maintainability; Equipments And Tools Requirement; Trouble Shooting - AOC Wipro WA19W Service Manual

19" LCD Monitor

8. Maintainability

8.1 Equipments and Tools Requirement

1. Voltmeter.
2. Oscilloscope.
3. Pattern Generator.
4. DDC Tool with an IBM Compatible Computer.
5. Alignment Tool.
6. LCD Color Analyzer.
7. Service Manual.
8. User Manual.

8.2 Trouble Shooting

8.2.1 Main Board
No power
Please reinsert and make sure the
AC of 100-240 is normal
Replace X401
No power
Press power key and look if the
picture is normal
NG
OK
Measure U701 Pin2=3.3V,
C704(+)=1.8V
NG
OK
Check if X401 oscillate
waveforms are normal
NG
OK
Replace U401
NG
Reinsert or check the power section
Check CN701,U701,Q702,Q703
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Wipro WA19W