Question about Behringer Ultratone K450FX Keyboard Amp / PA System
I am repairing this amplifier, which keeps blowing fuses. I have isolated the fault to the transformer, and I need to locate the part.
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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
A fuse blows like that because of an overload. Nine times out of 10 it will a transistor that is acting like a piece of wire. If you have a Ohm meter try the output devices. You will soon find the faulty part as it will be like you have touched the test probes together!
Posted on Dec 08, 2010
SOURCE: I own a Behringer Ultratone
This is most LIKELY an electronic problem... possibly in the final power amp. Repair may be a simple failed component or a mass number that fail like a stack of dominos. Take it to a shop for repair.
Posted on Apr 16, 2011
SOURCE: i replaced the transformer and
Transformers rarely fail... you wasted money on that... Likely one of the rectifier diodes/module or filter caps has shorted. Continued use will burn out the transformer. It is humming because it is overloaded with failing components.
Posted on Jul 04, 2011
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