Rotel is an audio components company specialising in high-end home theatre and audio amplifiers, power amplifiers and audio-video receivers. Repairing a Rotel amplifier with a serious problem is not recommended for most regular consumers, as most repairs require a high level of electronics engineering skill. However, there are some common-sense fixes that can help get your Rotel amplifier working properly.
Check the cabling connecting your audio components to your Rotel amplifier. Use a cable tester that checks for continuity, or by plugging the cables in question into audio or video devices you know to be working properly.
Unplug the amplifier and check to make sure none of the fuses are cracked or blown, which can cause intermittent power problems. A cracked fuse has a small fracture in the filament inside the fuse. A burnt-out fuse often has a blackish-grey colour on the glass tubing or near the metal contacts on the end of the fuses. Replace any cracked or blown fuses with new fuses.
Test your speakers with a properly working amplifier or by connecting the audio cables connecting to them with a cable tester. A blown speaker cone or improperly connected audio cable is commonly the cause of intermittent sound or no sound at all.
Turn the volume down on one channel of your amplifier to see if you have a dead channel, resulting in low output. Make sure you do this at a low volume to avoid blowing a speaker by overloading it. Do not attempt to fix a dead channel by opening the amplifier. Check your cabling, speakers, audio components, fuses and source material. Take the amplifier to a qualified technician if that does not work.
Make sure you have selected the right input on the front control panel or remote. Selecting the CD input when you are trying to listen to the radio will result in a very weak signal or no signal at all.
Select a different speaker input if your amplifier is connected to more than one set of speakers or has multiple speaker inputs. Using the wrong speaker group will result in no audio.
If your amplifier is under warranty, never open the device. Always take it to a certified repair technician or send your amplifier directly to the manufacturer if instructed to do so. Opening your amplifier and making repairs may void your warranty.
Never replace an old fuse with a fuse that does not have the same voltage. This can result in serious damage to internal power components in the amplifier or cause intermittent power issues.