Possible Common Problems and Solutions in PCB Assembly

When you are working with PCB boards, you are supposed to follow a certain flow of events in order to ensure that the design is flawless and doesn’t cause too many problems. However, even if you do that and follow the rules to the book, some problems are bound to arise.  Let us take a look at some of them here with a quick look at how you can avoid them. 

Solder bridging

You might think that soldering a joint too intently is going to secure the bridge even more. This isn’t how it works though. There is a phenomenon known as solder bridging which is caused when you have too much of soldering volume between two joints or probably incorrect placement of the soldering nib itself. If this is the issue that you are facing, there are three things you can do:

• Reduce the soldering volume

• Use a different machine for printing

• Change the opening of the stencil mask

Damaged components

This is the most common problem that the engineers have to deal with: a physically damaged component in the circuit. The problem may be common, but it is difficult to find the source here. It could have occurred when the placement machine was trying to place the component or an issue with the supplier itself. In either case, you only need to keep your focus on the damaged component and try to resolve the issue it is facing.

Engineers have always come up with solutions that allow them to save time and effort in case such issues come up. Although soldering is the best option, it is not the best solution all the time. To help, engineers add bases to the way of maintaining these components that they feel are prone to vulnerability. This is done by adding rows or bases to the PCB which saves them ample time in the later stages.

Lack of solder

Just how too much of solder volume can cause a problem, in the same manner, too little of the volume can affect the connectivity of the components in the design. If the pins are not wet enough or do not have enough of the material to hold them in the sockets, the connection will be affected. Here is what you can do to solve the problem:

• Change the printing machine to change the volume of the solder deposit

• Change the opening of the stencil mark

• Change the footprint of the stencil involved to have it match with the pins of the affected component

Old PCBs

No matter how good the soldering technique is or how good the design is if the PCB that you are using is old and has pads that are too small, nothing is going to work out. In such cases, changing the PCB is the only solution you have.

Shifting to newer and better-manufactured bards is going to solve most of the issues that you are facing. Ray PCB at RayMing Technology is a lot easier and efficient since it uses some of the best boards that have been manufactured keeping all your demands and needs in mind.