When watching something the voices (centre channel) will dissapear, sometimes switching the amp off and on again works, if not then i have to reset it. When it happens even the test tone from the reciever is barely audible through cenrte speaker. I have changed both the speaker cable and speaker to no effect.
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Re: DENON AVR-1905 centre channel dropout
I have seen this a few times. Try resoldering the pins on the voltage regulators. If you are not comfortabel with that, bring the unit to a service shop and report the problem as intermittant. Have them resolder the regulators and the surround output amp chips. This should cost only a minimal labor amount. That may resolve the problem. If not, then we'll need to look into the surround processing circuitry.
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zone 2 volume can be adjusted by zone2 remote control (small one which came with the unit) or by main remote control if you switch it to zone2 mode. My main rem control has a slide switch i have to put in zone 2 position to operate zone 2 amp.
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.
The output section has smoked and requires repair. The unit is not in "protect" mode. This means that the outputs are turned off to prevent additional damage to either the amp or the speakers. Expect a repair to run from $15-$40 in parts plus the local labor rate.
Units dc protect mode is probably activating due to Blown channel (shorted output transistors) I work for a Denon Authorized repair Center in Michigan If shipping to Michigan is economical let me know firstname.lastname@example.org