No Surround and Multiple Inputs Play at the Same Time
When trying to play a CD recently, I noticed that all my speakers were not playing (no surround effects, only the front left and right speakers, no center, no rear, no sub-woofer). I tried the different modes like Club, Theater, Live, etc. with no effect. When I switched the input source to the TV setting, I noticed that the TV sound started playing while the CD was still playing. I then switched the input source to the FM-tuner and all three started playing at the same time, no matter what source was selected.
I have tried the reset/restore button on the front panel which seems to temporarily eliminate the multiple input playing, but does not restore all channels.
There was a lightning /hail storm in my area recently, but no other components plugged into the same outlet including my television seem to have been affected.
Any ideas for repair suggestions? I've really been impressed with the unit and hate to think about shelling out he bucks to buy a new one. I am tech-savy, but don't have schematics or any tech notes for this model.
Re: No Surround and Multiple Inputs Play at the Same Time
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The HTR-420 has only a single subwoofer output. It is the socket on the lower left corner. The other subwoofer socket is part of the multi-channel input.
Because of the age of the 420, it comes from a time when optical and coax connections were not so common and DVD players had 6x phono/RCA sockets to send out the surround signal in analogue format. The multichannel input is for sending a signal in to the amp, and not for getting a signal out. That's why the sub doesn't get a signal from that socket. Use the proper subwoofer out. That's what it is there for.
The 420 was designed to run Speakers A+B together if required. However, you must observe the minimum impedance loading if you connect up two sets of front speakers and run them simultaneously.
The minimum Impedance for each set of front speakers is 8 Ohms. If you're recycling old surround speakers from a Home-Theater-in-a-Box system, or the speakers have no labels for impedance on the backs then you can be fairly sure they are not 8 Ohm. That could be the problem.
6.1 stands for six speakers and one sub-woofer - a total of seven actual speakers giving you the surround sound effect. Before it can play a surround sound environment, the media - a CD or DVD must have it encoded on the disc, like a movie that has 6.1 surround sound recorded on it or a music CD with recorded surround sound. Otherwise, it will just play stereo audio - two speakers and the others are redundant. And yes, it does sound better as if you are in the actual area it was produced - like if you were there.
The media you are playing must have surround sound recorded or encoded on it in order for surround sound to play or occur. Get a DVD or CD that has surround sound stated on the label - otherwise the system defaults to stereo playback.
The dvd player is responsible for reading the surround sound track, and sending it to the receiver. First make sure you are playing the surround sound track on the dvd, many have a stereo track too. Next, try another dvd and see if you can play surround sound on that one. If you can't play surround on ANY dvd I would start looking at the audio connection from dvd to receiver. Are you using an optical cable? Red, white, and yellow RCA cables? Optical will transmit any sound over only one cable, RCA cables need one cable for each channel (LF, C, RF, LR, RR, sub.) If your connections are correct, is the receiver set to play a surround sound track? Is it set in 2 channel mode?
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?