Why is Solder Flux Used in Soldering?The main function or use of flux in any Printed Circuit Board Assembly or rework is to clean and remove any oxide and impurities from the board. These oxides deposited on the board may not permit good solder joints. If the solder joint is poor, there...
The value of such a capacitor, essentially it’s “spring constant” for the mechanically–minded, is approximated by the formula in Figure 1 when the separation distance between the plates is small relative to their area. It should be noted however, that mechanical spring constants and capacitor...
The answer to this is it has a dry joint on the logic board due to the fan being dirty and the panel running a bit too warm. You can search for instructions as to pulling it apart and what you need to do is remove the top. Mark the screws as they come out otherwise you will ...
Reflow soldering eliminates manual solder joint errors. Types of mini-MELF diode boards There are a few common types of mini-MELF diode boards, categorized by their circuit configurations and diode characteristics. Rectifier boards Rectifier boards contain diodes wired in various rectifying circuits to ...
I am having exactly the problem which is described in the Macbook troubleshooting article (The screen is very dark, but everything else seems to be running. If you get in close with a flashlight, you can usually see the image faintly.) So I bought a new inverter but this did not ...
Wave Soldering Process The key stages in wave soldering process are: Flux application –Flux is sprayed on the bottom side of the PCB to remove oxides. Preheat –PCB is preheated to about 100°C to dry flux and prepare surfaces. Wave contact –The PCB travels over the solder wave, contac...
In my opinion, OSP is a great choice for mass-producing consumer products because it’s cost-effective, works well for soldering when it’s fresh, and provides strong initial soldering strength. However, over time, its soldering performance may degrade as the Intermetallic Compound (IMC) formed...
What is needed for cold welding? Soft metals, like aluminum or copper, are the best choices for cold welding. In a Butt joint, removing the barrier layer of the metal is not often required as the plastic deformation that happens during the joining process breaks up the barrier automatically....
If you melt solder underneath conformal coating it will expand in volume and normally burst out of the coating and form small solder balls. This does, of course, starve the solder joint and create more rework. The solution is to ensure that no coated solder joints are subjected to temperature...
Nonetheless it still works fine for tape-over-joint LPR motor retention, body tube joint sealing, etc. and is often seen on the range at NARAMs. Unlike Kapton, you can get it in shiny metallic colors. Another caveat is that like all polyester, edge nicks will propagate easily and rapidly...