Chapter 3
50
Use the following procedure as a guide for Acer LCD TV AT4220A problems.
Note:
The diagnostic tests are intended to test this model. Non-Acer products, prototype cards, or
modified options could occur false errors and invalid system responses.
1.
Duplicate symptom and obtain the failing symptoms in as much detail as possible.
2.
Distinguish symptom. Verify the symptoms by attempting to re-create the failure by running the
diagnostic test or by repeating the same operation.
3.
Disassemble and assemble the unit without any power sources.
4.
If any problem occurs, you can perform visual inspection before you follow this chapter’s instructions.
You can check the following:
•
Power cords are properly connected and secured;
•
There are no obvious shorts or opens;
•
There are no obviously burned or heated components;
•
All components appear normal.
5.
Use the following flow chart determine which part to be replaced.
Troubleshooting
Chapter 3
Содержание AT4220
Страница 10: ...4 Chapter 1 LCD Main Board Block Diagram ...
Страница 25: ...Chapter 1 19 For AT4220B Y Yellow Red White Blue Green R W 6 YLGHR 6 ...
Страница 28: ...22 Chapter 1 For AT4220B For AT4220 ...
Страница 47: ...Chapter 2 41 8 Release all the screws marked in red Then lift the TV back cover as shown ...
Страница 48: ...42 Chapter 2 9 Release all screws securing the PCB holder 10 Then remove the PCB holder as the arrows indicate ...
Страница 56: ...50 Chapter 2 ...