Question about Yamaha DVX-S120 System

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Sound Interference coming throught the Amplifier

I have positioned the amp below a Digital Satellite receiver. On occasion, about 5 minutes after switching the unit on, a high audible level Air sound comes out of the amp -- only switching off the unit and powering on again removes the interference.

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  • 7 Answers

On many occasions high pitch interference is a result of bad wiring and grounding problems. Check to make sure that you followed the manufacturer's instructions concerning grounding and installation of the amp, and if possible try and install it at another location in your house, using other electricity sockets. If the problem is solved by relocating the system, you might be looking at wiring problems (audio equipment can be very sensitive to that), if changing anything in the installation process solved the problem then the problem was probably due to bad grounding and "loose" electricity. Try making the installation as "clean" as possible, avoid tangled wires and stressing a single socket with too many electric appliances. If the problem persists, and you are still under warranty, I suggest contacting your local Yamaha dealer. If you're out of warranty I suggest locating a professional repair person.

Posted on Jan 19, 2006

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Posted on Jan 02, 2017

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The amplifier after turn on after 5 seconds go to Video 1 and you can't change to other input, the amplifier don't do nothing if you turn off , the amplifier turn on againyou


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Unplug the unit from the power source. Wait for a few minutes and then plug it back in again.

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Make sure that your TV or Stereo has not beed muted and that the volume is turned up loud enough to hear.

Step 2: Reset Receiver

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Step 3: Check Receiver-to-TV Configuration

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1 Answer

Wiring problem


If you have an aftermarket stereo, the hook up is fairly simple. On your amp there should be a minimum of 5 terminals and an audio input. one is for remote which is connected to the blue wire on your stereo. Second is your ground which is your negative connection. it should be connected to the body of the car close to the frame. Third is your hotwire which is the positive lead, it should go straight to your battery. The fourth and fifth are speaker wires, you may have 2 or more of these that have + and - signs above or below them. When wiring the speakers make sure to match the positive and negative connections on the speakers. If your rewiring all of the door speakers to your new amp then the colors that you see once you have them out are the colors you route to the appropriate locations on your amp. If this is for a sub then you just the connect th positive terminal on the sub which is red to the + on the amp and the black terminal on the sub the the - location on the amp.

Lastley there should be an audio input that runs from your stereo to your amplifier. This wire should be ran as far away from the positive wire as possible to avoid engine noise coming through your speakers.

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1 Answer

1080P video via HDMI generates awful interference


Your Plasma's native resolution is 720P. Go into the Blu Ray's output setup. you can choose 480p 480i 720p 1080i and 1080p. Set it for 720p that should clear up the issue.You may have to run Component directly to the TV since you only have 1 HDMI input and you can run Digital coax or optical to your AV receiver for audio. On a 50" TV the difference between 720p and 1080p using "GOOD" cables cannot be seen by the human eye. Above 50, yes it is noticeable.
Hope this helps.

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LCD directly to 5.1 Speakers?


No.
That is, not unless the speakers have their own amplifier built in.
The outputs you refer to them are line-out that need to be connected to an amplifier (also called a receiver).
When shopping for an amp, it would help to know what the maximum power the speakers can handle. Then, you can get an amp to match.
If you get an amp too powerful, you can blow the speakers up if you turn it up too loud.
Not powerful enough and you are not getting the most from your system.
You don't want to be running speakers at their maximum all the time either.
Good luck!

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My bose car stereo system no longer has sound. When the radio was first turned on, it would take approximately 5 minutes until there was sound coming from the speakers. This got progressively worse until...


The problem is in the power amplifier section. If you a preamp out connector you can troubleshoot using another power amp between that and the speakers but you may need a schematic to isolate to the components at fault. Bose is worth fixing and if you can remove it yourself you will save money by getting it to a bench technician, even a TV repair shop can fix it. Steve Medley

Nov 08, 2008 | Audio Players & Recorders

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MPA-101 Amplifier powers on, receives source signal, the fuse is not blown inside, but no sound comes out of the amplifier. The amp is pretty new, doesn't even have dust inside the unit.


Hello, is this a Radio Shack PA amp or Jamo amp? The unit is probably in "Protect" mode. Is this a PA system or a receiver...receivers have a protection circuit that will not let the speaker relay activate if the amplifier output section is shorted and sending voltage towards the speakers...so they won't fry!!The speaker relay should activate within 3 to 5 seconds if your output section is ok.

barneyluc

Oct 13, 2008 | Audio Players & Recorders

1 Answer

No sound from my record turntable into my computer.


If you're certain there is no sound going out of the TT...

Setting the Pre-amp Switch
For increased flexibility of use, this turntable has an internal
stereo phono pre-amplifier. The Pre-amp Selector Switch
is located under the turntable platter, in the rear-center
(Fig. 1). If the system amplifier you are using has a PHONO
input, set the Pre-amp Selector Switch to the “OFF”
position. If your amplifier does not have a PHONO input,
set the Pre-amp Selector Switch to the “ON” position and
connect the turntable’s output cables to the AUX or other
high-level input on the amplifier (described later).

Turntable operates, but no sound at all
1. The stylus guard is still in place.
2. The tone arm Lift button is pressed in.
3. Amplifier controls set incorrectly: wrong input selected,
tape monitor on, speakers switched off, etc.
4. Check the stylus on phono cartridge for correct placement.
Refer to the instructions for replacing the stylus
on page 5.
Turntable operates, but no sound, or sound not loud
enough
1. If the turntable is connected to an AUX (high-level)
input: The Pre-amp Selector Switch may be set to the
“OFF” position (phono-input level).
2. The input gain of the amplified speaker or similar
device may be too low.
3. The stylus assembly may not be fully seated in the
cartridge body.

You could also isolate the problem to either the TT or the PC by trying the TT on some other sound device like a receiver. Make sure the PreAmp Selector switch is ON and plug the TT into any AUX, CD or TAPE input.

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1 Answer

No sound when first turned on.


i have an amplifier ONKIO too and my generation is older than yours but i'm the same probleme and it's normal if you use this amplifier to your speakers. the internal switch must be heat to give a normal sound without distorsion. it's the principal problem of the onkio amplifier but after the quality of thr sound is great
so take the time and be patient now you know you have to start on your amplifier 5mn before use :)

Jan 18, 2008 | Onkyo TX-SR502 Receiver

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