Question about Rotel Audio Players & Recorders

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Rotel RHB-10 amp channel not working

The left speaker channel is giving out no sound

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  • AK47
    AK47 Jun 14, 2014

    Hi Damien , I want to help you with your problem, but I need more information from you. Can you please add details in the comment box?

    have you checked the fuses if yes just work your amp for 10 minutes with a 30 minute break betwen them let me know the results

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  • Contributor
  • 9 Answers

YOU ARE NOT RIGHT IT SHOULD GIVE AT LAEST A LOW VOLUME SOUND WITH A LOT OF DISTORSION AND A CRACKING NOISE IF DOES I GUESS THAT YOU HAD THIS AMP IN A PLACE WITH A LOT OF HUMIDITY AND YOU HAVEN'T WORK IT FOR SOME TIME IF I AM RIGHT PUT YOUR AMP IN THE SUN AND WORK IT FOR 10 MIN WITH A 5 MIN BREAK LET ME KNOW THE RESULTS

Posted on Sep 03, 2014

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6ya6ya
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Posted on Jan 02, 2017

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Duncan
  • 219 Answers

SOURCE: 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.

Posted on Jan 18, 2007

  • 21 Answers

SOURCE: rotel ra-820 amp speaker ports dieing

You may have blown a fuse on the left channel due to speaker wires shorting or a defective speaker. If there are no fuses on the rear of the amp there are probably internal fuses. They are usually glass with a small wire running from end to end. If the fuse is blown the wire will be broken. Replace with the same value of fuse.

Posted on Aug 27, 2007

  • 1 Answer

SOURCE: Rotel rx 1050...Not working

If you are not using the 12v trigger between pre-amp and power amp make sure that the trigger switch on the rear of the RB-1070 is set to off

Posted on Feb 12, 2008

  • 319 Answers

SOURCE: Rotel RMB-1095 Power Amplifier Problem

Sounds like wiring problems. Unhook everything, then get owners manual for proper instruction

Posted on Apr 17, 2008

  • 1 Answer

SOURCE: Speaker Loss Of Sound

Works great after this solution with the cables.

Thanks

Posted on Jan 22, 2009

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Tip

REPAIR ASSISTANCE


ROTEL RA 980BX
Fault: No output from left channel. The right channel is working fine.

Added some photos and circuit for reference

While testing the amp noticed that the left channel is giving switch on off thump while powering ON and OFF the amplifier. It happens when there is DC voltage flow through the speakers. It shouldn't be there. And the thump is there only on the left channel. While testing the amplifier section found that all the transistors where idling at mentioned voltage. All Base pins where around +/- 0.5volt. and the output is almost 0.012mvdc.
FOR MORE DETAILS CHECK THE LINKS
http://electro-medical.blogspot.in/search/label/ELECTRO%20MED%20SERVICES
http://electro-medical.blogspot.in/

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