Weird surround sound speaker behavior with Denon 2105 7.1
Hi, I have the above mentioned amp, and I'm experiencing a couple of
strange problems. I have a 5 speaker arrangement, and when I set the
unit for 5/7 channel stereo, the right rear speaker works, but the left
front does not. When I set it to "virtual", the left front speaker
works, but not the right rear. Right front and center work in both
modes (left rear does not work because of a severed cable - not part of
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Re: Weird surround sound speaker behavior with Denon 2105...
It may sound silly, but can you check all your speaker cables again and confirm whether they are connected to the right connections. please check all cables as also the severed one and please repair it also.
Now please go to the system-set-up and do an auto setup and set up your speakers. Listen to the test tones and confirm that they are coming out of the correct speaker.
Once these are set, then if still there is mismatch of sounds, then we could further trouble shoot.
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I have a different model, but sometimes suffer this when power outages or other strange things happen. Its usually the microprocessor getting confused and not doing its job properly, once none of the speakers came on at atll!
In the handbook, it will tell you how to do a factory reset - that always sorts mine (Same brand, Denon). Just a pain setting it all up again.
You should be able to find a PDF version of the handbook online if your's is misplaced in the house move.
Bad button on the remote? or static discharge from being touched can cause all kinds of strange problems. I would reset the micro processor back to default settings.. RESET PROCEDURE 1. PUSH MAIN POWER SWITCH OFF 2. WHILE HOLDING THE FOLLOWING KEYS DOWN, PUSH MAIN POWER SWITCH ON AVR-2105 or AVR-885 Front Speaker A and B (2 keys) Let the front panel blink 3 or 4 times and then release the keys (buttons) You will have to do your set up again i.e. speaker size, assign inputs, FM presets etc.
Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced hands-on tech.
Front panel button engaged for 5 or 7 channel operation? Also check front panel rear surround speakers button is engaged. Should get you back to 7.1 unless you have changed the rear surround speaker setup for a 2nd zone, also be sure you have a 7.1 DSP setting enabled.
The spkrs sound like they are bi-amp spkrs, meaning you have multiple terminals on the backs of each spkr, the jumpers on the spkrs should be connected as such. Now you just connect the spkrs according to the Denon spkr conection diagram. Do not use the surround back unless you have 6 or 7 pair of spkrs
If your amp looks like it's going to work as normal (ie the front display lights up as it should etc), but then the amp goes into protection mode when the anti-thud circuit times out, then I know what's likely to be wrong.
It's one of the power amplifier channels which has gone faulty.
I just found this out after having this problem with my AVR-1906.
I took the amp apart and de-soldered the suspected channel power transistors (centre channel in my case).....and hey-presto! it fired up as normal (obviously the centre channel would be out of service).
I have ordered the replacement transistors from Farnell (UK) at a miserly cost of around £2-£3 each.
Just waiting for them to arrive.
An alternative is, if you don't use all your channels, take the transistors from a known working but not needed channel and swap them over with the duff ones.
If the Cd is wired digitally, it will only play through the main zone, because the Denon cannot convert down to RCA to cater for the zone 2. If you plug RCAs from Cd to Denon, Main zone will STILL play from digital, and RCA connection will allow zone 2 to play Cd from RCA input....same with dvd, Satellite Blah blah... no stress, any nasty RCA will do if you want to try before you splash out on really costly cables...perhaps you can help me...want to run AVR 2105 with 2 speakers in zone 2, manual says cant do it - only ably to surround back or biamp...dont want either, dont have stereo yet to try it out...did you have any trouble with that?