Maintainability - HannStar HQ171D Service Manual

H a n n S t a r D i s p l a y C o r p .
Document Title
Document No.

11. Maintainability

11.1 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.
11.2 Trouble Shooting
11.2.1 Main Board
No power
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HQ171D_XY _HSM
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 U702 PIN2=3.3V ;
D701(-)=1.8V
OK
X401 oscillate waveforms
are normal
OK
Replace U401
NG
Reinsert or check the
Adapter/Inverter
section
NG
Check CN701 or replace
U701
NG
Replace X401
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Revision
07/08/09