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Nov 3, 4. I have ensured that the balance knob is in the centre position. Turntable only working on one channel.

Sadly, there are no independent fuses PER CHANNEL so repair is likely to be down to replacement of something in the output stage of one channel – the main power transistor s are the usual suspects.

Nov 4, Just wanted to follow up and thank you for the responses and suggestions for the non working left channel on the second hand Denon receiver I bought. After that, you can post your question and our members will help you out. If you are ok with basic multimeter operation and use and reasonably skilled with a soldering iron I see no reason why you cannot successfully fix the unit. I have tried this with both “A” and “B” speaker buttons engaged and get sound from the right speaker only in both cases.

Do both channels work in any other mode?

Denon DRAR receiver – Left speaker channel not working on speakers A/B. | Electronics Forums

Not sure what you mean by checking to make sure I am operating the set correctly but I will have a look at the User Manual. Thanks for your assistance. We need to isolate whether the fault is in one channel of the stereo FM receiver or in the amplifier itself.


If you have a mono switch, then switching to mono will provide the same signal to both audio amplifiers. Fortunately for me, I was able to return the receiver to the seller as I did not have any more time to spend on trying to repair it. If sound comes out of both sides, then the tuner switch?

Nov 3, 5. Denon DRA amplifier won’t turn on after being left on for extended period.

Upon turning up the volume, I am only getting sound from my right speaker. Try them if you have. Nov 3, 1.

Denon DRA-335R Manuals

That may not be your problem and you may have to troubleshoot to find the electronics failure, As with many electronic items like yours, repair is always possible but the final decision may be based on either your skill sets in managing the repair yourself with our full assistance of course or handing it over to a ‘paid’ repair service where the costs exceed the value.

Dec 7, Nov 3, 3. Nov 4, 9. Given that the other channel works we can take it for granted that the DC positive and negative rails are ok. Nov 3, 8. If one side is still faulty, I would compare the amplifier voltages with the good side but this may be getting a bit deep for you.

You must log in or sign up to reply here. Is there an easy way to clean the speaker selection switches? Do you have headphones and a socket to use them in?


Thank-you for the links to the manuals. I am currently just trying to get the receiver to work in Tuner mode. I’ll just start out of the gate with what I usually find wrong when this happens: Drx 14 of the technical manual shows how and where to measure the amplifier bias current and by following those instructions you may be able to isolate WHICH channel the fault is in.

Turning on the power and ensuring that Rda selected the “Tuner” mode, I located a stereo signal. It is quite likely that one channel is defective – a common problem with ‘second hand’ equipment. Denon Receiver Acting Strange. The speaker selection switch needs to be cleaned or replaced. I am also trying to find a User Manual for this receiver. Speakers “A” – connected both left and right speaker, ensuring polarity is correct for both. Ask a Question Want to reply to this thread or ask your own question?

You’ll need to choose a username for the site, drs only take a couple of 33r5 here. Search Forums Recent Posts. Having said that, the only connections I have made are: Power cord plugged in.

Let me try this again as I appreciate the advice being provided and as such am confirming the steps I have taken below. I appreciate the time and support provided. I did confirm via another receiver that both speakers are in working condition. Nov 3, 7. Discussion in ‘Troubleshooting 335r Repair’ started by Pepi9, Nov 3, Similar Threads Speaker not working.