Hello.
One of our CCR1036 began acting funny. After a few hours of head scratching looking into the software while taking angry customer calls, the unit was replaced.
On visual inspection of the faulty unit, we discovered these bulged capacitors. They seem to be there to stabilize power to the Ethernet chips. Lack of physical stability of the Ethernet ports was consistent with the symptoms observed. Therefore, we believe that these capacitors are to blame.
Now for the next problem. Which is to find replacement capacitors. You would think that the markings on the capacitor body would be enough, right? Well, no. Markings are:
MG 105ºC
1209(M)
Now, the part about the temperature rating is pretty clear. But, what does 1209(M) mean?
A usual convention uses 3 digits (XYZ), meaning the capacity is XY*10^Z pF. But in this case, that would work out to 12*10^9 pF, or 12 mF (milliFarad, not microFarad), which is huge for an electrolytic of that size and presumed voltage rating.
I have tried searching and asking around, and nobody seems to know what is the capacity of those things. Does anybody have an idea?
P/S: Mikrotik, listen, we will pay you 20 euros more for each CCR and you put quality capacitors, ok?