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Looking at pictures on line, you'll nee to remove the electronics panel - take out the screws around the rear edge at the back & the 3 at the top, behind the handle / in front of the panel. I would expect the panel to come out thru' the rear..... Be aware of the speaker lead - could be a bit short so you may need to disconnect it. Once the electronics panel (mixer & amp etx) is clear you should be able to get your hand inside / under the handle & undo the bolts. There's a possibility the if the handle is held on with bolts then there could be "blind" or "Tee" nuts under, so undoing the handle screws may be all you need to do? Take care though, because if they're normal nuts they could drop off into the gubbins! Good Luck!
Greetings! Ok, your amp has an XLR (3-prong) Low-Impedance input on Channel 1 for a Mic. All the other inputs are 1/4" High Impedance inputs, which are for instruments and/or other High Impedance items including low quality High Impedance Microphones. The SM48S is a high quality Low Impedance microphone, so if you use it with a 1/4" plug, it will be in a High Impedance channel, and will be very LOW in volume in comparison with everything else. So, you must use an XLR (3 prong) cable from the Mic to the Channel 1 input on your amp. That will do the trick. Good Luck with your new amp and Mic!
Scroll down to "Get Manual" and click on it to download. The file is compressed and the preamp/FX is on one, the power amp on a second, and a trivial tweeter crossover on the third... I did not see the power supply. Check speaker for continuity of voice coil. Else it is likely a power amp failure.
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.
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