18.5” LCD Color Monitor HCL HCMELWBT11
30
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 100V-240V is normal
Reinsert or check the
power section
Check if X401 oscillate
waveforms are normal
Check C423(+) =1.8V
U404 Vout=3.3V
OK
OK
NG
NG
NG
Check CN404 or replace Q409,
Q410 and U404
Replace U401
Replace X401
NG
OK
Summary of Contents for HCMELWBT11
Page 26: ...18 5 LCD Color Monitor HCL HCMELWBT11 26 7 PCB Layout 7 1 Main Board 715G2904 2 2 ...
Page 27: ...18 5 LCD Color Monitor HCL HCMELWBT11 27 ...
Page 28: ...18 5 LCD Color Monitor HCL HCMELWBT11 28 7 2 Power Board 715G2852 2 ...
Page 29: ...18 5 LCD Color Monitor HCL HCMELWBT11 29 7 3 Key Board 715G2835 1 ...
Page 38: ...18 5 LCD Color Monitor HCL HCMELWBT11 38 10 Monitor Exploded View ...