Precautions for the maintenance of the LCD screen:
1. Start with simple things first:
To deal with the problem, you need to start with the simplest thing, that is, first check the external environmental conditions (problem visualization, power supply, connection, etc.), and then check the internal environment of the display (connection status, device color, component shape, indicator light Status, etc.), this is conducive to focus on the judgment and positioning of the problem, we must pay attention to it, only after careful observation can be judged and repaired.
LCD
2. Think first and then do it according to the phenomenon:
According to the phenomenon of the problem, first think about where to start and how to operate, and then carry out the actual maintenance operation. You should consult relevant materials (maintenance manuals, etc.) as much as possible, and after understanding the corresponding technical requirements and application characteristics, analyze and judge based on the actual situation and combine your own knowledge and experience before proceeding with maintenance.
3. Static first, then dynamic:
The so-called static inspection is the inspection performed before the machine is powered on. When it is confirmed that the static inspection is correct, the dynamic inspection can be performed by powering on. If abnormal conditions such as smoke are found, shut it down immediately and perform static inspection again. This can avoid undue damages caused by energizing the machine due to unknown conditions.
4. Clean first and then repair welding:
When the monitor is damp, dropped or there is a lot of dust inside, the moisture or dust may cause corrosion to the circuit board of the monitor. In this case, it is generally necessary to clean the internal circuit board of the display first, and then perform repair welding on the dummy soldering part of the circuit board. After cleaning and repair welding, some problems can be automatically eliminated.
5. Turn off the power before overhauling:
Since the internal circuits of the display all use integrated circuit chips, their working voltage is only about 3V, which is easy to be broken down by static electricity. Therefore, when plugging in the internal connectors of the display or welding the components in the circuit board, turn off the power first, and then Check the circuit board of the monitor again.
6, power supply first, circuit:
According to experience, the problem rate of the power supply part accounts for a relatively high proportion of the whole machine. Many problems are caused by the power supply, so repairing the power supply first can often get twice the result with half the effort.
