PCB Technical - Why must PCBA be tested?

1.In order to improve the qualified rate of products

With the improvement of product qualification rate, the pass through rate of product will be greatly improved. PCBA testing is a link in the whole production process of PCBA processing and an important means to control the product quality.

2.In order to get a better user experience

If conditions permit, every product needs basic testing, such as testing ICT, FCT testing, some tests, such as fatigue test, pressure test in harsh environment, aging test, sampling products that can only be tested. Our heart will have a bottom, and only products that can stand the test will be liked by users. If problems are found in the process of testing, we can correct and adjust in time to make the whole product more complete and avoid serious consequences after the product is put on the market.

3. Test conditions ofPCBAcircuit board

3.1. In order to prevent contamination of parts, you must choose EOS / ESD full protective gloves or fingertips and wear electrostatic rings. The light source is white or fluorescent. The light intensity must be above 100 lux and be clearly visible within 10 seconds.

3.2. Inspection method: place the product about 40 cm away from the eye, about 45 degrees up and down, and check with visual inspection or triple magnifier.

3.3. Inspection standard: (according to QS9000? Sampling = 0, AQL = 0.4%; as a special customer's requirement, determined by the customer's acceptance standard)

3.4. Sampling plan: MIL-STD-105E grade II standard single sampling

3.5. Criteria for inspection: severe defect (CR) AQL 0%

3.6. Main disadvantage (MA) AQL 0.4%

3.7. A minor defect (MI) AQL 0.65%

4.PCBAboard inspection standard

4.1. Serious defect (expressed in CR): any defect that is sufficient to cause injury to human or machine or endanger life safety, such as non-compliance with safety regulations / burning of machine / electric shock.

4.2. Main disadvantages (expressed in MA): defects that may cause damage to the product, abnormal function or affect the service life of the product due to material reasons.

.43. Minor defect (expressed in MI): it does not affect the function and service life of the product, the appearance is defective, and the mechanism assembly has slight defects or differences.

ipcb.com specializes in producing high quality PCBA. Please contact ipcb if necessary.