I recently purchased this pre-owned amp. It began making a poping noise out of one channel. the channel now intermittently works and it seems to run quite hot.
Have disconnected and re-connected all components, still pops. Have disconnected interconnects to pre-amp, left the speakers cables attached and it still pops. Have tried alternate speakers, it still pops.
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The fact that you are gettng noise out suggests that the problem is in the "front-end" of the amp. It sounds like the pre-amp section is smoked. What you are hearing is a little distortion that is getting through the pre-amp stage. This can be as simple as replacing a few cheap ICs. I don't know your exact model specifics, but this should be a straightforward repair. Where are you located?
Anything that blows a fuse has an overload caused by a faulty part. The suspects are the transformer, rectifier, voltage regulator and the large Electrolitic capacitors - all in the power supply section. In amps the devices on the heat sink can cause the fuse to blow.
Again the main suspect in the dead left device is also whatever is on the heat sink. However if can't hear any music etc playing even at full volume on the left you could have lost the left pre-amp stage, but I myself would stick to whatever is on the heat sink as the cause of the trouble.
You need to determine if the power is getting to the audio amp section. For instance with the volume full up is it humming etc? As a 'rule' it's unlikely that both left and right channels will fail at the same time (unless you have done something silly with the amp) you are looking for something that is common to both channels. Which is why the power section is first suspect. The exception to the rule (above) is where amps use say an IC power amp for both channels. You will find this IC on the big heat sink. Check whatever is on that anyway for damage or burning. The only other area could be the pre-amp part. Again this could be a single IC controling both channels, so it's failure could cause a loss of sound. By the way if you can hear music/sound coming through when you put it up to full volume the pre-amp will be generaly good.
Can I assume that you have input signals going to both channels and that you have SWITCHED the cables to make sure that both cables going to the power amp are actually sending signals to it?
That will rule out any cable / pre-amp problems.
After you have done that test, let me know.
These units are capacitor coupled between stages. It sound to me like one or more of those caps are defective. There is an extra stage of amplification for the Phono inputs. Check the phono pre-amp section for defective caps.
connect right channel speakers to amp left out if the problem fixed you will have a problem in amp itself. if the problem remained you will have a problem in speaker itself test first with new cable and second with speaker cabinet,
Sounds like classic dry joint on speaker terminal ROTELS are well known for it,if you can use a soldering iron or know someone who can resolder the pins where these terminals are connected,always make sure amp is unplugged from wall socket before ...