Maintainability; Equipments And Tools Requirement; Trouble Shooting - HCL HCM9LWAT11 Servise Manual

19"W LCD Color Monitor

8. Maintainability

8.1 Equipments and Tools Requirement

1. Multi-meter.
2. Oscilloscope.
3. Pattern Generator.
4. DDC Tool with and 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 100V-240V is normal
OK
Measure CN701 PIN9, 10=5V,
U702 PIN2=3.3V
OK
X401 oscillate waveforms are
normal
OK
Replace U401
NG
NG
NG
Replace X401
32
HCL HCM9LWAT11
Reinsert or check the
power section
Check CN701 or U702