Maintainability; Equipment And Tools Requirement; No Power; Trouble Shooting - Asus VW223 Service Manual

Service Manual

8. Maintainability

8.1 Equipments and Tools Requirement
1. Multi-meter.
2. Oscilloscope.
3. Pattern Generator.
4. DDC Tool with an 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
NG
Please reinsert and make sure
the AC of 100-240 is normal
OK
Measure U8 PIN2=3.3V
U9 PIN2=1.8V
OK
Measure Y1 oscillate waveforms
are normal
OK
Replace U3
NG
Reinsert or check the
Adapter/Inverter section
NG
Check CN3 or replace U8,
U9
NG
Replace Y1
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ASUS VW223