Problem with Rotel RA 870

Check the rest of the power supply, for example the transformer if there is no power at all. If you are getting some indication of power, check the voltage regulator circuit.

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.

Try interchanging the speakers. If the right channel works, you have a problem with your speaker.

Hi,
I think RA 12 is not existing type, but RA 12xx types exist.
Please try this link, and I hope you will find the relevant documentation.
Good luck!
gylacz

check power amplifier component one should leak or damage so your power consumption is too high

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.

Hi Nell. It is serious. Unless you are technically inclined, it needs to be checked out by qualified person. It will be fairly expensive to repair. Get an estimate.
Thanks
Paul

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.

Dan

some amps have a switch to bridge them rather than wiring a bridge meaning output is mono check to see if yours has this switch if you do simply put back to stereo

This unit is in protect mode. The outputs are disabled to prevent further damage to either the amp or the speakers. If you are not comfortable with electronics, bring this to a servicer. Expect a parts cost in the range of $15-$40 plus the local labor rate.
Dan