There has been problem in my rotel which I bought , the Rotel RX-402 (combo amp/radio reciever) on eBay the other day, its got some annoying popping sounds in the preamp section somewhere.Does anyone have any ideas what it might be?Its not the power amp since you can disconnect the preamp from the power amp via RCA jumpers on the back so I could isolate each section.
The pops are independant of what input is selected and of the control knobs (it does it at zero volume). When you are playing it loud you cant hear the pops but when you are playing something quietly, they are really annoying.Sometimes they are a lot worse than others. Ive tried turning off anything I thought might be causing RFI eg my computer, modem , etc, but no improvement. Sometimes you cant hear them at all. Which makes me think maybe its some sort of interference, though maybe also a defective component, or joint, or connection or something? The volume of the pops varies randomly, when really bad They sound a little like the pops on a crackly vinyl record.
it looks to me like the problem is in the final stages of the preamp section.
Im happy doing basic electronic repair eg changing capacitors etc, though i am by no means an expert at reciever electronic tech.pls help i am really confused with it pls as soon as possible.
