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Time of issue:2020-07-15 00:00:00
Common causes and solutions for PCBA pseudo welding
Let’s take a look at the common causes and solutions of PCBA pseudo-welding in the following Sanjing:
PCBA pseudo-soldering is a common circuit error. There are two common reasons for ...
Let’s take a look at the common causes and solutions of PCBA pseudo-welding in the following Sanjing:
PCBA pseudo-soldering is a common circuit error. There are two common reasons for ...
Factors affecting PCBA processing tin penetration
Before introducing the factors that affect PCBA processing tin penetration, let's first understand the PCBA tin penetration requirements: According to the IPC standard, the PCBA tin penetration requirements of through-hole solder joints are generally more than 75%, that is, the solder penetration standard for the appearance inspection of the panel surface Not less than 75% of the hole height ...
Before introducing the factors that affect PCBA processing tin penetration, let's first understand the PCBA tin penetration requirements: According to the IPC standard, the PCBA tin penetration requirements of through-hole solder joints are generally more than 75%, that is, the solder penetration standard for the appearance inspection of the panel surface Not less than 75% of the hole height ...
What are the basic elements of SMT assembly
2021-11-16
(1) SMT attributes
①Miniaturization: SMC/SMD has the characteristics of light weight, small size and high installation accuracy. Therefore, the volume of the final product using SMT can be reduced by 40% to 60%, and the weight can be reduced by 60% to 80%. ②High performance: The components in the SMT assembly have a low rejection rate and higher vibration resistance. ③High reliability: Electronic products using SMT components have high frequencies...
(1) SMT attributes
①Miniaturization: SMC/SMD has the characteristics of light weight, small size and high installation accuracy. Therefore, the volume of the final product using SMT can be reduced by 40% to 60%, and the weight can be reduced by 60% to 80%. ②High performance: The components in the SMT assembly have a low rejection rate and higher vibration resistance. ③High reliability: Electronic products using SMT components have high frequencies...
Why does PCBA do testing and inspection method standards
(1) In order to improve the product qualification rate
With the improvement of product qualification rate, the straight-through rate of products will also be greatly improved. PCBA testing is an indispensable link in the entire production process of PCBA processing and an important means of controlling product quality.
(2) In order to obtain a better user experience
Generally speaking, if conditions permit, every product needs basic tests, such as ICT test, FCT test, aging test, fatigue test, stress test under harsh environment, aging test, etc. Because PCBA is...
(1) In order to improve the product qualification rate
With the improvement of product qualification rate, the straight-through rate of products will also be greatly improved. PCBA testing is an indispensable link in the entire production process of PCBA processing and an important means of controlling product quality.
(2) In order to obtain a better user experience
Generally speaking, if conditions permit, every product needs basic tests, such as ICT test, FCT test, aging test, fatigue test, stress test under harsh environment, aging test, etc. Because PCBA is...
The purpose and precautions of PCBA rework
2021-10-27
Solder joint defects such as open circuits, bridges, false soldering and poor wetting generated in reflow soldering and wave soldering processes need to be manually trimmed and removed with the help of necessary tools (such as BGA rework station, X-Ray, high-power microscope, etc.) Various solder joint defects, so as to obtain qualified PCBA solder joints.
However, the solder joints to be repaired should be judged before repairing: ①The electronic product should be positioned before judging what solder joints need to be repaired. Determine which level of product the electronic product belongs to. If the product...
Solder joint defects such as open circuits, bridges, false soldering and poor wetting generated in reflow soldering and wave soldering processes need to be manually trimmed and removed with the help of necessary tools (such as BGA rework station, X-Ray, high-power microscope, etc.) Various solder joint defects, so as to obtain qualified PCBA solder joints.
However, the solder joints to be repaired should be judged before repairing: ①The electronic product should be positioned before judging what solder joints need to be repaired. Determine which level of product the electronic product belongs to. If the product...
How to distinguish common SMT components
2021-10-22
(1) The difference between chip inductance and chip resistance
1. Judging by the shape: the shape of the inductor is polygonal, and the resistance is basically rectangular. When the shape of the component to be distinguished has a polygonal shape, especially a circular shape, it is generally judged as an inductance.
2. Measure the resistance value: the resistance value of the inductor is relatively small, and the resistance value of the resistor is relatively large.
(2) The distinction between chip capacitors and chip resistors
1. Look at the color: chip capacitors are mostly gray, cyan, light yellow, and some have no printing on them, mainly because they are...
(1) The difference between chip inductance and chip resistance
1. Judging by the shape: the shape of the inductor is polygonal, and the resistance is basically rectangular. When the shape of the component to be distinguished has a polygonal shape, especially a circular shape, it is generally judged as an inductance.
2. Measure the resistance value: the resistance value of the inductor is relatively small, and the resistance value of the resistor is relatively large.
(2) The distinction between chip capacitors and chip resistors
1. Look at the color: chip capacitors are mostly gray, cyan, light yellow, and some have no printing on them, mainly because they are...
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