Service manual

19″ LCD Monitor Wipro WA19W
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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
No power
Press power key and look if the
picture is normal
Please reinsert and make sure the
AC of 100-240 is normal
Reinsert or check the power section
Check if X401 oscillate
waveforms are normal
Measure U701 Pin2=3.3V,
C704(+)=1.8V
OK
OK
NG
NG
NG
Check CN701
,
U701
,Q
702
,Q
703
Replace U401
Replace X401
NG
OK