Question about Behringer Bugera 6262 212
Posted by Anonymous on
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Posted on Jan 02, 2017
Try running the amp with no speaker cables connected. If it doesn't blow the fuse you know it's either your Speakon cables or the speakers themselves that are to blame (it's usually the cables)
If it still blows then there is a more serious problem with the power section.
Posted on May 28, 2009
You start with a schematic... This is link to a BX1200 which MAY be fairly close to the BX1800.
Scroll down this link page and find "Get Manual" link to click on. They will let you download two a day unless registered.
On the schematic, assuming it is close to yours, on page 3 right in the cnter is a circuit using an opto-isolator. It appears that this is a limiter circuit which senses symetrical output drive and if the drive goes to one side the opto clamps the input of the power amp to ground... it is possible this is the problem area... especially the electrolytic cap that is in that part of the circuit.
There can be many things causing your problem... It is possible that for the BX1800 they have put THREE of the 3886's in parallel instead of just two to get 180 instead of 120 Watts. The LM3886 is a fantastic chip when one reads the specs and they are only $4 from the right source...
There could be problems with one of the amps in the preamp section.
Posted on Mar 21, 2011
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