PCB新聞 - PCB電路板的强大修復技巧

近年來, 工業設備的自動化程度越來越高, 囙此，各個行業的工業控制板數量也有所增加. 工業控制板損壞後, 更換 PCB電路板(as little as a few thous和 yuan, as much as more) Ten thousand or several hundred thousand yuan) has also become a very headache for enterprises. 電路板維修, 作為一個新興的維修行業, 也在快速發展. 大部分受損 PCB電路板 can be repaired in China, 與購買新板相比，它可以節省70%-80%的成本, 而且所用的時間比固定外板的時間要短得多. 以下介紹了電路板維護的基本知識.

幾乎所有 PCB電路板 維修沒有圖紙和資料, 所以很多人都懷疑 PCB電路板 repairs. 雖然各種電路板非常不同, 同樣，每個電路板都由各種集成塊組成, 電阻器, 電容器，由其他部件組成, 囙此，電路板的損壞一定是由一個或一些部件的損壞引起的. 基於上述因素，建立了電路板維護的理念. 電路板維修分為兩部分：檢查和維修, 其中檢查佔有非常重要的地位. 測試了維修電路板上每個設備的基本知識, 直到發現並更換壞零件, 然後修理電路板.
電路板檢查是發現的過程, 確定並糾正電路板上每個電子元件的故障. 事實上, 整個檢查過程是一個思維過程和一個提供邏輯推理線索的測試過程. 因此, 檢驗工程師必須在電路板維護過程中逐步積累經驗，不斷提高水准, 測試, 和維修.
通用電子設備由數千個組件組成. 維護和檢修期間, 通過直接測試和檢查電路板中的每個組件來發現問題將非常耗時. 困難. 然後，檢入式檢查方法從故障現象到故障原因是一種重要的檢查和維修方法. 只要電路板檢測到問題, 它很容易修理. 下麵為大家總結了電路板維修的基本公式, 方便實用.
普通電路板, the circuit combination is tens of millions
The appearance of components changes frequently, and character recognition is the key
Resistance and capacitance are the most common, and damage is also common
The resistance value of the resistance is easy to change, and the capacitance leakage is still leakage
Inductance transformer is a coil, simple test to see the on-off
Diode and triode, measure the positive and negative of the PN junction
MOS tube and thyristor, trigger test is the key
All of the above are discrete components, integrated circuits for many years
The analog device has an operational amplifier, and the virtual short and virtual terminals are used to judge
Optocoupler isolates the front and rear stages, and the damage is tens of millions
Digital devices are often seen, before 40 and 74 marks
There is also an analog-to-digital converter, which is very laborious to test
Don't forget ROM and CPLD, programming depends on the programmer
CPU, 單片機, timing judgment logic instrument
Various sensors, the probability of damage ranks first

The above is the introduction of PCB電路板 維修. Ipcb也提供給 PCB製造商 and PCB製造 科技