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your either overloading something cause that's what pops fuses. My guess is that what your plugging in or into has a ground issue. I'm wondering if it does it with nothing plugged in at all. I would say if you have nothing in and it does it, you need to find where the ground issue is. that's my best guess
Likely the filter capacitors have a problem. Best to take this in for repair... it is ODD that there is noise with the standby switch is in standby... That makes no sense... In standby it appears that power is removed from the power amp high voltage so nothing should come through the speaker... Unles maybe one off the power tubes had a total meltdown which should have blown the fuse.
Hi there.You may have a blown fuse.Unplug the amp then undo the screws that hold it all together.Remove the wires off the speaker and put an AA battery across the speaker connections(of the speaker).You will hear a clicking sound if the speaker is ok.If not then the speaker is blown.This could also damage the circuitry.Check the fuse(s) and replace with exactly the same rating.Assemble and test if still no go then the circuitry is faulty.You could then take it to a repair shop and ask for a quote to repair it.
It might be cheaper to buy a new unit.
The power amp section has blown parts. You will likely find they use a chip like the TDA7293 as the power amp output and it will be blown, shorted causing the fuse to blow. These cost $6 from Digikey.com. Find a competent tech to replace it and use heat sink compound. Verify the part before ordering one. They come with leads bent either way so make sure you get the one with a matching suffix letter. When firing up after repair, put a 60 watt light bulb in series with the hot power lead to act as a current limiter... saves blowing fuses if there is another problem.
Hi, blowing a fuse in an amplifier is a problem that most guitarists face at one time or another. If an amp won't turn on, or it turns on for a second, then makes a popping sound and turns off, the problem is usually a blown fuse. Though a blown fuse can be a hassle, especially during a performance, it does not have to put a stop to your musical enjoyment. With a spare fuse you can be back jamming to your favorite tunes in no time flat.
Things You'll Need
Turn off the amplifier and unplug it from the wall.
Locate the fuse, which is usually found at the back of the amp. The fuse will look like a small black wheel sticking out of the amp with a number and the letter V next to it. For example, 9V.
Gently turn the fuse counter-clockwise to remove it from the amp.
Discard the old fuse.
Insert the new fuse into the empty fuse slot and turn it clockwise until it is firmly in place.
Plug in the amplifier; make sure the power switch is in the off position.
Turn the amplifier on to make sure the new fuse is working properly.
The unit will require repair and if you are not adept at electronics, you will need to take it to a shop. Likely there is failure in the power supply or amplifier that has blown the fuse. Replacing the fuse WITHOUT repairing the cause MAY do additional damage.
Not a fuse. First thing, to check your speaker (amp unplugged, of course), touch the + and - speaker connections to a 9V battery. If you don't hear a pop sound then your speaker is blown. Thus, no output sound. If speaker is OK, then the output IC is your problem.
Some amps do have a small buss fuse located in the back of the unit, but this will usally be only to cut the power to the amp off, if you are sure you have no power, i.e. no lights are on as well then the fuse could be blown, if you find it MAKE SURE THE POWER IS DISCONNECTED BEFORE REMOVING IT and replace it with exactly the same type, but first make sure all controls are up even the ones on the instrument.