Question about Rotel RMB-1095 Power Amplifier

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Rotel Amplifier RA-9808X

I have a problem with the TONE on/off selector of which the contacts are badly corodite. I would like to replace the switch but I do not have a circuit diagram could anybody please help.

Vic le Roux South Africa

E-mail vicleroux@telkomsa.net

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  • Anonymous Mar 30, 2014

    I Have rotel ra 414 amplifier and i want to know if there is a way to connect to hifi system or pc?

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Allthough 4 years later, If you need a schematic just mail me, I'll send it to you w/o any costs.

Posted on Nov 17, 2011

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Instead of replacing you can try and clean it. There are a lot of good contact cleaners out there.

Posted on Mar 15, 2008

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1 Answer

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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!
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That must be the inrush current.
Maybe you are using the wrong fuses.
Please check if those are fast or slow types.
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All I can say to you is look around where the mains goes in very carefully. Fuses are sometimes hidden or in a case or cover of some kind. Sometimes amps use fuseable resistors. If the PC board is marked up look for resistors with "RF" or different indication to a normal resistor. Otherwise fuses will have "f" markings on the board. Remember the power supply part might be enclosed in a metal case with holes in it, so might be hard to spot fuses.

Nov 02, 2009 | Rotel RMB-1095 Power Amplifier

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Need manual for ra 840bx4 & wattage output when remote speakers?


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

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Right speaker jack not working


Why would it die from being in storage? Oxide or corrosion on contacts, volume potentiometer, Tape Monitor or other switch contacts.

Try manipulating all controls and switches throughout their ranges many times and see what happens.

Check the heaphone jack. If it works so does the right amplifier. While you're at it, insert the headphone jack multiple times to cycle its contacts, too.

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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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1 Answer

Rotel RA 9808X Amplifier


I'd suspect that one of the two output transistors on that channel has gone bad. If you are unsure how to test or troubleshoot this, then you might try replace both the NPN and PNP outputs and catch the bad one that way. If your amp uses an output module then you would of course have to replace the module which would replace all the output transistors on both channels. Good luck. Another thing to look out for, is the emitter bias resistors. They are the large white ceramic ones near the outputs. Sometimes one of those will open up too. They will be of a very small resistance value like .5 ohms (point five ohms) or something in that general ballpark, and have a wattage value of typicaly 5 watts. So they are pretty big resistors. Be sure to check them all even if you do find a bad output transistor. They will often go out with the transistor. Good luck.

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