展开初步检查对重要元件。初检后应分辨下列现象：应用装配线是不是适合；精

Launched a preliminary examination of the important elements. After the first test should distinguish the following phenomena: the application is not suitable for assembly line; accurate measuring equipment, equipment and test criteria are not accurate; external data signal element are appropriate; external data signal is not a response like. Note that some of the pre-failure elements. For example: high temperature and noise, vibration and leakage.

Expand a preliminary inspection on important components. After the initial inspection, the following phenomena should be distinguished: whether the application assembly line is suitable, accurate measurement equipment, equipment and test standards are accurate, whether the external data signal of the component is suitable, and whether the external data signal is responsive. Note the fault precursors of some components. For example: high temperature and noise, vibration and leakage.

Carry out preliminary inspection on important components. After the initial inspection, the following phenomena shall be distinguished: whether the application assembly line is suitable; whether the precise measuring equipment, instrument and equipment and test standard are accurate; whether the external data signal of the element is suitable; whether the external data signal has response, etc. Note the warning signs of failure of some components. For example: high temperature and noise, vibration and leakage, etc.