After turning the power on the Rotel RA 870 amp the protection light stays on for hourse preventing me from playing my system. when it finally goes off i can play my music for and hour or 2 but it sounds under powered and eventually the light comes back on and these prevents me from playing music anymore. i have the amp for 10 years now and i only use pre amp section of it since i bought it. almost never switch it off so that may have something to do with the problem. PLEASE ADVICE
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Re: Problem with Rotel RA 870
Since it is a Rotel, it is a good unit and worth fixing. At this point, you need to take it to a good repair shop and let a qualified tech look at it. There are no user serviceable parts inside and if you go poking around in there, you WILL make the problem worse. Rotels' are nice units and represent a good value in stereo gear. Take it to a reputable repair shop that repairs Rotel under warranty. If thats not available to you, then a good repair shop should be able to get you going. Good luck...Rob
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I'm guessing you don't know for sure that it even needs fuses. They don't go out like they used to, as everything is controlled by a microprocessor(computer within your unit). I would suggest, that you, with the power plug pulled out, use an ohm meter to be sure that each fuse is shorted. If you need further assistance, or would like to inquire about a repair, please visit my website at audioserviceclinic.com. Thank you.
on bridge mode the speaker impedance should be 8ohms, less than this clipping will happen. try bridging two 4 ohms in series.
if this happens without speaker connected, u have a power amp section that is trying to draw more power than it can handle. as for the second check connections first, otherwise i suspect u have a defective power amp for the right channel.
Power switches generally have to replaced by the same thing, due to safety standards.
I don't know if any of these firms stock Rotel parts, but you can give them a try. They are all online electronic spare part stockists: CPC, SEME, Willow Vale.
Two more appear to be trade only: Charles Hyde and Son, and Wizard.
Failing them contact Rotel, they might have the part or suggest the place to go.
Lets try the simple stuff first. This whole problem could be caused by a dirty switch contact. Pick up some electronics cleaner from a local electronics shop and spray the switch (from the inside of the unit). Work the switch on/off a number of times then respray one more time. That should clean out any dirt that is there. Try the unit again and hopefully the problem is resolved. If not, then the switch itself may need to be replaced. When you get the cleaner, get one that contains a lubricant as well. This will help to prevent the problem from coming back again.