Some Usual Tips for PCB Board.
Shahadat Hosen
Field Service Engineer – Ophthalmic Equipment | Promoting & Educating on Alcon’s Advanced Ophthalmic Technologies | Committed to Customer Satisfaction & Team Collaboration
## Here are some most common procedures for finding PCB faults and repair ##
1. Physical Damage: The most common damage to PCB, often happen to the assembled components.
2. Component Failure: If no physical damage but the electronics cannot run, we can almost define the certain parts on the boards are going wrong. The damaged components can be a diode, triode, or IC (commonly).
3. Trace Damage: Usually, we can see the copper/silver traces on an electronic board with the naked eye. Some common causes of trace damage include lightning strikes, power surges or short circuits, metal dust contamination, overheating, wear, and tear.
4. Visual Inspection: By looking closely, and smell, to identify whether the circuit board has burnt parts, damaged copper, or peculiar smell, whether there is a bad soldering place or a phenomenon of mold and blackness on the interfaces/gold fingers?
Recall the failure phenomenon and the process of failure. In most cases, we'll be able to define the failures of certain parts.
5. Comparison: The contrast method is one of the most commonly used methods for PCB board repair without drawings. By comparing the good board with the defective one, the abnormality is found by comparing the two boards.
6. Replacement: Replace PCB with a new one.
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# Grades of PCB Board Repair Engineers
Grade 1 Junior Engineer
They've got the basic circuit theories, are able to recognize different components, and do somewhere simple PCB board repair. These people need more practical experiences.
Grade 2 Senior Engineer
These ones have got many experiences, and improved their PCB board repair skills, especially in the repairing speed. They are able to draw the schematics and do somewhere modifications.
Grade 3 The Master
At this stage, they have gained enough theoretical knowledge and practical experience, with their own innovation, they always seasoned find and solve the problem from the root up. Many authoritative technical articles about PCB board repair are written by them.