MikroTik

hi... i have rb 2011 with burning L2 component. i want to replacing, but i need advice for best product for replacing. any recommend?

rb 2011

Usually if a inductor burns it’s because of an overcurrent situation. I would check for shorts in the components surrounding L2. As for the value of L2; I would guess something like 1uH. But only Mikrotik can answer that since there are no schematics available.

Usually if a inductor burns it’s because of an overcurrent situation. I would check for shorts in the components surrounding L2. As for the value of L2; I would guess something like 1uH. But only Mikrotik can answer that since there are no schematics available.

yes... i think this inductor, but idk values this component and still waiting someone know or have serial code this component.

RLeemans is correct. There is something else causing coil/chock L2 to burn. I suspect something external to the device. Typically a small choke in a device like this is there to block RF coming in an external cable. Without a schematic, I can't tell you exactly what, but I have some educated guesses.

First, it could be a device on port 10 pulling an excessive amount of current.

But my best guess is an excessive voltage input from its power source. If the input voltage is higher than spec, then probably a voltage protection diode is trying to shunt the excess voltage to ground. That will increase the current through the chock. I notice what looks like some discoloration at the end of diode D2. From the photo, that could be normal leftover solder flux or heat discoloration. It's hard to tell.

As long as the router still functions once you find the real culprit, you COULD just leave L2 in place, as the damage is basically cosmetic. But if the router has died, you could have more damage than just L2.