Makita DCS520 ignition module fixed
After becoming so frustrated about not finding a replacement for the defective ignition coil, or seeing some of them for as ridiculous prices as 120$, I decided to give a try and fix mine. So, I dremmeled the back side of the module, almost touched the coil, but no electronics there. I went on the other side (the one that goes to the flywheel) and started removing the plastic case, found some epoxy glue underneath, a steel plate, and the electronics under it. Luckily, the bad guy (a power transistor) was on that side of the electronics board. Cleaned the epoxy around it, removed the part, found an equivalent for 80 cents, installed, poured some silicone sealant to insulate the stuff..... it works. If someone wants to try my method, I am really happy to help him out with some advices.