Hello every one!
I have a FANUC CPB PSU A16B-1212-090 explosion. 
I tried it several times before buying. It's OK! But when the machine just started exploding.
This is the second circuit, and explodes in place.
Please help me! Today is a bad day for me.
Thanks you every one!
FANUC CPB PSU A16B-1212-090 BOOMMMMMMMM! :(
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davidnguyen -
October 26, 2017 at 5:52 PM -
Thread is Resolved
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Have you checked for the usual ?
Input voltage vs expected voltage, short circuit, frequency ... ?
Does it "explode" right away or does it takes time ?
Also, does anything have been changed recently on this controller ? -
Hi Shalatik.
This is the second circuit, and explodes in place.
In about a month of inactivity it exploded.
2 board same same
3 fuses at the input and output are not broken -
The part number A16B-1212-090# seems to be a PSU for R-J2 Mate controller.
The Board next to the PSU is normally the Mainboard. And according to that, the quantity of connections on that Mainboard, seems to be for a R-J controller.
Both controllers are incompatible. Probably that's way it explode.
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Ohh it is clear now. All this is for a fanuc control for cnc.
Sorry :/, I can not help you with this. Probably in a cnc forum you could get more info.
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Is there any part of this board constantly powered, even when the main controller is not powered ?
If so it might be because current flows from somewhere else (like another machine on the same electrical network). Maybe the "exmplosion" corrolate with the powering or use of another machinery ?
Otherwise it might be electrical insulation wich is deficient and some current are leaking from someplace else. In that case you might wanna try checking for connection between the board and the ground.Hope this will help
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