Hello all!
I am attempting to repair my Behringer Multicom Pro-XL MDX4600. When I opened the case, the (apparently) non-polarized ceramic capacitor at the FBR output was blackened and cracked open. I could not read the value at all, and when attempting to gently remove it, it quite literally disintegrated into little chunks and powder.
Now I'm assuming it's a smoothing capacitor, since it sits between the FBR and the voltage regulators. Without a schematic (I couldn't find one anywhere online), I don't know how to calculate what I need, or if it was indeed non-polarized (the silkscreen on the PCB is no help here.)
The power consumption of the unit is a max of 18W @ 60Hz,120v.
Also - this happened suddenly - the unit was working normally - I went to work, came back home and it wouldn't power on. I also can't provide pics, as the component in question is currently dust and tiny chunks
So two questions:
1) What would a safe value be?
2) How does this happen? The mains power comes in, goes through the toroidal transformer, into the FBR and through the cap to the power regulators. I'm not sure how a spike (maybe?) could've gotten through enough to burn this cap to a crisp.
Any info and/or discussion (I'm still learning every day) would be appreciated and welcomed
I am attempting to repair my Behringer Multicom Pro-XL MDX4600. When I opened the case, the (apparently) non-polarized ceramic capacitor at the FBR output was blackened and cracked open. I could not read the value at all, and when attempting to gently remove it, it quite literally disintegrated into little chunks and powder.
Now I'm assuming it's a smoothing capacitor, since it sits between the FBR and the voltage regulators. Without a schematic (I couldn't find one anywhere online), I don't know how to calculate what I need, or if it was indeed non-polarized (the silkscreen on the PCB is no help here.)
The power consumption of the unit is a max of 18W @ 60Hz,120v.
Also - this happened suddenly - the unit was working normally - I went to work, came back home and it wouldn't power on. I also can't provide pics, as the component in question is currently dust and tiny chunks
So two questions:
1) What would a safe value be?
2) How does this happen? The mains power comes in, goes through the toroidal transformer, into the FBR and through the cap to the power regulators. I'm not sure how a spike (maybe?) could've gotten through enough to burn this cap to a crisp.
Any info and/or discussion (I'm still learning every day) would be appreciated and welcomed