19" LCD Color Monitor No Brand L19WH
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8. Maintainability
8.1 Equipments and Tools Requirement
1. Multi-meter.
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
Measure U702 Vout=3.3V
Q702 Vc=1.8V
Reinsert or check the
Adapter/Inverter
section
X401 oscillate waveforms
are normal
Check CN701 or replace
U702, Q702
Replace U401
Replace U401
Replace X401
OK
OK
OK
NG
NG
NG
NG
NG
Summary of Contents for L19WH
Page 25: ...19 LCD Color Monitor No Brand L19WH 25 7 PCB Layout 7 1 Main Board...
Page 26: ...19 LCD Color Monitor No Brand L19WH 26...
Page 27: ...19 LCD Color Monitor No Brand L19WH 27 7 2 Power Board...
Page 28: ...19 LCD Color Monitor No Brand L19WH 28...
Page 29: ...19 LCD Color Monitor No Brand L19WH 29 7 3 Key Board...
Page 30: ...19 LCD Color Monitor No Brand L19WH 30 7 4 Audio Board...
Page 39: ...19 LCD Color Monitor No Brand L19WH 39 10 Monitor Exploded View...
