Dynatron Nomad TP11/TP12 With the volume at minimum there is a hiss which sounds to me like thermal noise. do you have a solution as to which component is causing it as I cannot find a cct diag.

I assume that the power-amp is good.
This noise, of course due to defective parts inside.
But, which section is it? Chances are:

• Amplifier circuit in the Main-Outputs. If the MAIN MIX in the minimum position and still noisy, then the damage in that section.
• At one or several channels. Let's test.
  Set to minimum volume for all channels and MAIN MIX. EQ=flat. FX=minimum. TRIM at half (let's try at 12 o'clock).
  Raise the MAIN MIX, let's say at 15.
  Gently, raise channel 1 volume to maximum, listen, if there is no noise, channel 1 is safe. Lower the volume to the minimum again. Move to another channel in the same way.
  If found noise, that is where the problem is.

Actually, many more detailed steps for testing, but the description is too long. This above is a simple way.
Circuit power supply should also be checked, whether all normal voltage.





It is part of the image of the amplifier section circuit.
Parts which may be broken is the IC 64,65,77.

Sir if you're using VLC player or any player that goes beyond the limitation of volume of the computers then don't use it.

Go for normal windows player or real player

is the sound like hissing or like a spark something like?hissing can caused by leaking of high voltage that is dangerous and sould be fix right away

No, that will not help. The his is a function of the receiver NOT receiving a signal from the transmitter as they apparently do NOT have a "squelch" circuit to mute the receiver noise when no signal is being received. The noise level when no signal is received is pretty high and apparently the volume control is not enough to reduce the hiss.

To solve this, LEAVE the transmitter ON and make yourself a switch at the receiver. DO this using one of those little in line lamp switches that fit on zip cord. Make one on a short length of zip cor with mating connectors to fit the received jack and the headphone plug. Don't worry about unshielded wire as the impedance is very low. Then you use this switch to mute the headphones when you want to. There are other switch types you can use, I am just suggesting what might be readily available to you.

Sennheiser SHOULD have include a mute switch on their unit as turning the power off on the receiver would be a pain. They could have used a volume control with switch to kill the audio line out... simple solution... oversight on their part.

HI I am having the same problem. tv sound is fine, then fades so that 50 is the only sound volume to hear the show. It happens intermittently. Did you get your's solved? thanks

open volume control & remove check from mute button.

start-program-acessories-entertainment-volume control.

my mic was plugged in the front panel of my pc. it was producing that hissing noise. then i plugged directly into the sound card at the back of the pc. problem solved.

Hook a graphic equalizer between the piano and speakers, and turn down all sliders above 8 kHz. Since the highest note of a piano is 4186 Hz (4.186 kHz), you'll still hear all the notes but cut the hiss. If the hiss is coming from the speaker's power amplifier (in which case the equalizer won't help), turn down the speaker volume and turn up the piano volume. Live instruments generally need some doctoring to sound good through high-quality stereo equipment, as they only produce a limited range of frequencies whereas good speakers reproduce a lot more - including hiss.

I had the same problem for the longest time with my set of Logitech 540 5.1 speakers. Turns out the solution was pretty simple. All I did was open the Master Volume controller and mute the Microphone. Hissing went to zero. Sound is great now.

you should check the outline ctrl..for a mic...it could produce a noise...if you have your speakers connected to pc...check the position of the plugs and the volumen of mic put in down...