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SMT Troubleshooting

Santosh Das

Santosh Das

Santosh, founder of this Electronics Tutorial Website, is an Electronics Geek, Blogger and Young Entrepreneur. He possesses vast experience in the field of electronics, electronic components, PCB, Soldering, SMT, Telecommunication, ESD Safety, and PCB Assembly Tools, Equipment and Consumables. Keep visiting for daily dose of Tips and Tutorials.

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10 Responses

  1. There are a variety of faults which present in SMT. In this blog I found exclusive solutions for defected SMT. This blog really helps me to overcome the SMT problems.

  2. Avatar MFG engineer says:

    I have a problem with soldering and can’t seem to be able to find any information in the web. I am using a alpha 0m5100 sn pb ag solder paste, the paste is applied to panel by a stencil printer then components placed by a pick and place and it enters the reflow oven, the solder looks ok until you remove forcefully the soldered component after the reflow procces in which underneath the solder looks dull, dusty, mate and overall like it didnt melt inside, only the surface has the shiny finish. According to my thermal profile the oven recipe meets the solder paste specifications. Ive also tried cleaning the panel prior applying solder paste, change solder paste tube to a new one, adjusted force in which paste is applied by squeege. Do you have any recomedations that could help with this issue?

    • Santosh Das Santosh Das says:

      Are you bothered about the Dull Looking Solder Joint or Poor Solder Joint and Electrical Performance. Lead-Free Solder give Dull Looking Solder Joints but you should not be bothered about the Dull Look. Performance will be excellent. If you use Sn/Pb Paste (Removing Sn), you will get shiny Solder Joints.

  3. Avatar MFG engineer says:

    I was worried because the exterior of the joint looks shiny and the interior look like it is unmelted, we don’t have any problem the electrical performance, but I wasn’t sure if this appearence was normal or not since the solder paste is not lead-free, and if this could represent a future problem.

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