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Left channel volume is very faint as compared to the right channe

The left channel output is very faint(both in A and B MODES) .But the right channel works perfectly

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It sounds like the preamp section is working but the power amp is not. Look at the power supply section and see if it is getting power to the power amp and if ok check the power transistors or IC.

Posted on Feb 16, 2009

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How do i connect my amp to my vizio tv there are right and left outputs on tv but only one input on back off amp


Typically you need an preamplifier between your tv and amplifier. you run one optical cable (or coax ) cable from you tv audio output to the preamplifier then you run audio rca cables from preamp outputs to amp inputs (2 for stereo 5 or 7 for surround). the preamp decodes audio and controls volume and surround modes.
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Vision 708 mixer amp


Jimbo

I am not sure about the LED fault lights....but I have a few troubleshooting angles to provide a start:

Try checking the power supply at the output devices and compare with the good (Left) channel.

The distortion you are hearing may be due to
low voltage.

This is a stereo amp, so you have a good (Left) channel to compare with. Use a multimeter to compare resistances (no power applied) or voltages (power on) at the components working back from the outputs of each channel. When you find a difference you have located the faulty area.
If you can get an oscilloscope it can also be used to trace the path back from the output of each amp. Good Luck Be careful!

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No Output from any channel


ok i got it now may be you are putting the codes in wrong pin thats why happening this problem.

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Hi my amp left channel does not work. the speaker relee works at both channels and the amp works fine at the right side.it goes not in protect what do u think is wrong ?


It could be a number of things. Try this test first though. Play some music and swing the balance control to the bad channel and turn up the volume all the way if needs be. If you hear any music breaking in the pre-amp is ok. If not it could be dead. Again if you hear faint music it's the power amp that's not working.

Next have a look inside. You should be able to identify the channels by following the wires from the speakers. Remember that stereo amps are just two mono amps joined. So the Right Channel will act as a guide to what the left should look like. Plus if you are any good with a volt meter provide the correct voltage indications. Any burnt/damaged parts on the left and not on the right is an indication of the fault area. If you have no output from the above test pay close attention to those parts on the heat-sink for the affected channel.
Ignore the power supply parts are anything that is on it's own, unless it's an IC with both channels going into it. As they can go faulty on one channel, but not the other sometimes.
If you can't find anything it might be an idea to replace the left output device(s).

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L/ front audio out not working fully. pre amp channell working & headphone L/front working. Can you advise


The left channel output in the amplifier stage is going out - could be a cold solder connection due to overheating. Check the left channel output of the power transistors solder trace - you can compare them to the right channel stage because they're almost identical circuits.

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The volume on the left channel on my old (20+ yrs) Denon stereo receiver is too low intermittently, usually until it warms up from use, and sometimes after. Ideas?


Problems of this nature are often caused by electrolytic coupling capacitors. If you have access to an audio signal generator. Inject signal at volume control and compare left and right output levels. This will isolate fault to pre amp stage or power output stage. freezer can be very usefull in isolating this type of fault.

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Low volume output and very low volume when digital broadcast


if you are using a digital converter along with a standard tv , you have one volume level low making the unbalance sound a humming sound, if it is directlly into your tv, check your settings on your tv bass, trebile, by the sound of it you probably have a digital converter , if this is so, raise the volume of your TV to mid point that raise /lower your volume on the converter and it should be fine, also make sure your ouput channel is not the same as your broadcast channel in your area, example,,if your area uses channel 3 for broadcast, set your rf output to chann 4 , and vice versa.

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Try to tighten the screws at the back where you insert your A/V jacks.

Thanks!

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Can you swap speakers and see if the left working speaker works when plugged into the right output?

If it does, then your right speaker is bad or the right speaker cable/plug may be bad.

If the working left speaker doesn't work on the right output, then I would suspect a problem in the right channel audio amplifier.

Please let me know if I can be of further assistance to you.

Good luck!

- Jim

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