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Yamaha ax470 amplifier, power amp works but nothing else

Power amps work but pre-amps are inoperative. Does it require a remote control to work?

Posted by Anonymous on

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  • Yamaha Master
  • 924 Answers

This unit has main in, preout jacks. When you say the amp works, are you referring to the amp turning on? There will be no sound out of the amps, if there is no preout. Are you aware that there needs to be jumpers between the main in and preout jacks? If you don't have the jumpers, no problem; just use a stereo patch cable between the jacks above.

Posted on Jan 14, 2015

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Posted on Jan 02, 2017

black dingo
  • 2 Answers

SOURCE: my old yamaha wont stop buzzing

HI SIR .THAT IS NOT BIG PROBLEM.ALL YOU HAVE TO DO MAKE SURE THAT YOUR PRE HAVE THE FLL.1 PROPERLLY EARTHED(THE GROUND FROM YOUR AMP ALSO GOES TO THE PRE )2 ASK YOUR ELECTRONIC MECHENIC TO CHECK IF THER'S NO BROKEN GROUND ON THE BOARD INSIDE.

Posted on Aug 23, 2008

Duncan
  • 218 Answers

SOURCE: Puchased A Yamaha DSP-A1092 Amp from Auction turns off

I doubt it. Sounds like it is going into protection due to bad output transistors or some such. Time for a trip to the repair shop it sounds like.

Posted on Nov 14, 2008

  • 4234 Answers

SOURCE: Yamaha rx-797 w/Yamaha ge-60 eq utilizing prein/main out ..and ad

It sounds like you want to use the external amp rather than the internal one. If that is the case, just connect the output of the EQ to the input of the external amp. All you are doing is inserting the EQ between the amp stages now. Using the mx-1 rather than the internal amp is no different.

Dan

Posted on Feb 25, 2009

petraman7
  • 1175 Answers

SOURCE: Yamaha Amp DSP A-3090 Power/function/Remote

These issues can only be fixed by an audio-tech.

Do a websearch around your area for a repair person

Posted on Nov 04, 2009

  • 1 Answer

SOURCE: Kenwood stereo control amplifier KC-206 doesn't work

I found this thread when I was having the same problem with mine. Turns out that it's sort of a problem, but not really. Looking at the manual (which I found in another google search) I believe a "4" on the volume level corresponds to a default remote control setting. The remote varies the level between 0 and 10, but the "10" corresponds to the maximum volume setting on the preamp. So it actually works, it's just that the "4" reading doesn't change. There's probably a pin you can short somewhere to make that default to "10" which would be ideal. But I'm not sure where that is. Now on to my other problem. This particular preamp has a subtle 120 Hz hum...

Posted on Dec 02, 2009

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1 Answer

How to connect a yamaha p7000s amp to an adcom gfp-555 preamp


Use "Main Out Norm" from the gfp-555 pre-amp and connect to Canon connectors of the Yamaha. This requires a standard RCA to Canon cable for correct connection. Start with this first, if that works OK than try the "Lab" output of your pre-amp, but I am not sure if the Yamaha can handle this or the results of sound quality. Your choice.

Feb 17, 2016 | Yamaha Audio Players & Recorders

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I have an older creek 5350se. It has what appears to be bridging pins connecting the pre with the power sections of the amp. Can I connect the creek as a pre amp to a power amplifier.


Hi Lorne,

You can use the amp as a pre by removing the 'jumpers' - or as a power if required.

The 'jumpers' are simply used to connect (or disconnect) the amplifier's pre & power sections.

Hope this helps.

May 08, 2015 | Creek 5350SE Amplifier

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Connect to power amp


plug the bars out plug whatever to the pre in, then the remote out to the power amp.

Dec 07, 2013 | Roksan MkIII Amplifier

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What's the difference between integrated amplifier and power amplifier?


An integrated amp has the Pre-amplifier built in ( Volume and tone controls)
A power amp has no tone controls and no pre-amp section

Aug 30, 2010 | Audio Players & Recorders

2 Answers

Can this present amp use microphone? because i need the one with mic input for my project


Hi,

No, you have to use a mixer or a microphone pre-amplifier.
The inputlevel of those amps are to low for a microphone.

regards,
Gerard

May 07, 2010 | Yamaha P4500 Power Amplifier 2-Channel

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My turntable connect to Carver Preamp, I bought a


If you can hear music with the volume up, but like it was turned down low (from the power amp), then yes there is something up with it. If it's the same on both left & right channels, then it's something common to both. For instance the power supply, or an IC that has both channels going in it.
If however the power amp does produce sound normally with another device, then either the turntable has a fault, or the pre-amp has, perhaps on the pre-amp inside it for the cartridge.

Dec 16, 2009 | Yamaha P-2500 Amplifier

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Yamaha Amp DSP A-3090 Power/function/Remote


These issues can only be fixed by an audio-tech.

Do a websearch around your area for a repair person

Sep 30, 2009 | Yamaha DSP-A3090 7-Channel Amplifier

1 Answer

Difference between audio amplifier & OPAMP


An audio amplifier is a general term that applies to any amplifier specifically designed to cover the audio spectrum, and usually referres to power amplifiers (of any power from micro headphone amps (like the headphone audio amplifier circuit in an ipod) . to power amps like the ones used at rock concerts that are several thousand watts).

An OP-AMP is an Operational Amplifier, which refers to a type of amplifier circuit. Op-Amps can amplify audio, but are not restricted to it. They are used in many things from audio circuitry to signal conditioning, and sensing from all kinds of equipment from seismometers, to light sensors, temp sensors, insturmentation amps, lab amps... RF amps etc...

There are many many different types of op-amps that are designed for many different applications. Mostly the parameters are frequency response, gain, and input/output impedance.

Op-amps usually come in an IC package of some sort. The most common are 8 pin DIP package types.

Op-amps do NOT handle power. (although there are some hybrid power op-amps available, they are specialty devices) The term op-amp refers to the ability of the amplifier to be manipulated mathematically by external values. (i.e. resistors set up to add, subtract, or multiply the value of the input signal) Hence the term OPERATIONAL amp, because it is performing mathematical operations on the signal. (They were first used in analog computers, allowing the voltages to be added, subtracted, and such, and displaying the resultt by directly reading the voltage value).

They handle only small signals, and require being followed by a POWER amp to do anything useful, such as drive a spleaker, or a relay, or a transducer.

For your question, most all audio amps consist of stages.

There is an input/pre-amp stage (this is usually where the eqalization, signal processing, and bass/trebel tone controls are implelented) and a power amp (output) stage that takes the signal fromthe pre-amp and raises the voltage and current to a sufficient level to drive speaker.

The input/pre-amp stage is most usually composed of a series of op-amps. Op amps also are responsible for the bass/trebel control, and the EQ.

There will most usually always be several Op-Amps in every Audio Amp.

Jun 12, 2009 | Audio Players & Recorders

1 Answer

Speakers are connected to pre-amp or power-amp? pls explain connections , what connects with what , between cd player + pre amp + power amp + speakers.


Do this, CD audio out jacks to the PRE-AMP INPUT jacks, then PRE-AMP OUT jacks to AMPLIFIER INPUTS then from AMPLIFIER to speakers, This will work similiar with any sound source unit ie. Radio Tuner, Tape deck, etc. Just think of it this way, a PRE-AMP is BEFORE the AMPLIFIER, all the AMPLIFIER is going to do is AMPLIFY the sound to your speakers, HOPE THIS HELPS!

Feb 03, 2009 | Audio Players & Recorders

1 Answer

My old yamaha wont stop buzzing


HI SIR .THAT IS NOT BIG PROBLEM.ALL YOU HAVE TO DO MAKE SURE THAT YOUR PRE HAVE THE FLL.1 PROPERLLY EARTHED(THE GROUND FROM YOUR AMP ALSO GOES TO THE PRE )2 ASK YOUR ELECTRONIC MECHENIC TO CHECK IF THER'S NO BROKEN GROUND ON THE BOARD INSIDE.

Aug 17, 2008 | Audio Players & Recorders

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