SE535 Ribbon cable patching
We have with us today a set of Shure SE535 for a repair and reshell job. The shell has started to break down due to age and one of the sides fell apart causing the drivers and connectors to disconnect and the result is a torn ribbon cable.
*This article is only meant to be a guide and we are not responsible for any damage or injury to your equipment or yourself if you should attempt it yourself.*
This particular set has been repaired before so the plastic strip holding both the drivers together is missing but you can just cut it away when you encounter one. The Shure SE535 is an In-Ear Monitor(IEM) with a triple driver set-up. When we inspect the driver, we can see the traces of the connection on the ribbon cable and also the driver units.
When we go along the ribbon cable, we can see a resistor(black) and a capacitor(brown). The capacitor goes directly to the tweeter creating a high pass filter which removes sound below a certain frequency determined by the value of the capacitor. The resistor, likewise, goes direct to the dual driver unit, reducing the power output of the drivers which is also determined by the value of the resistor.
When patching the wires, we would first want to determine where each of the wires goes. For this case, since the ribbon cable is torn clean off from the connector, we will need to patch 2 wires.
The items required to perform this repair are as follows:-
Scissors to cut the plastic holding the drivers together
Needle and super glue/502 CA glue
*The links helps us get a small commision when you purchase from them, it is not a lot but it helps us come up with newer and better content!*
Firstly, we will be "tinning" the female Mmcx connector. The tinning process is basically coating the connector or wires with a layer of solder to make soldering easier. I will be coming up with a dedicated video/article on the tinning process and will put the link here when it is ready. Alternatively, here is the link to an elaborate video explaining the soldering process directed at DIY audio.
Secondly, we will solder the enamel coated wires on to the connector. The centre pin is the positive signal using the red wire, and the side pins are the negative or ground signal where we will be using the blue wires. Just position the wires on top of the soldering points and tap them down with the soldering iron.
Thirdly, we will now identify where each of the wires goes. As we look at the ribbon cable and trace them, we can see that we have to position the red wire to any point in between the capacitor and the resistor. We will solder it to the resistor in this case.
As we go further along with the tracing process, we can determine the ground of the assembly. The ground signal of all 3 drivers are connected, so we would only have to patch them to one of them. In this particular case, we will be using the ground pads on the tweeter.
Lastly, after patching the wires, test the sound balance of both sides of the IEM.
After testing, we can seal them back using a needle and super glue. Pour a small amount of super glue on a piece of unwanted plastic. Dip the needle into the droplet of glue and apply them along the edges of the shells.
Close the shell, wipe off any excess glue and hold them together for a minute using your fingers or a clamp.
That concludes today's article and we hope we were able to help you with something!