Audio system buzz with dimmer-controlled track

It works without a fuse?

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My system is sensitive to my variable track lighting.

Have you looked at the manuals?

http://www.retrevo.com/search?q=sony+nx810

A TV won't run external speakers directly. Besides, the TV-related audio should originate at, say, the cable Box, and go straight to your (presumed) AV receiver for the best possible decoding and reproduction.


Buzzing is an analog phenomenon and is NOT carried by optical cable in any case.

Buzzing is usally AC line noise leaking into an un-shielded cable somewhere or a floating ground. If the AC plug is reversible, try that. Sometimes the buzz is from an attached device. Make sure all audio cables are plugged in tightly at each end and routed away from or at right angles to any power cords and away from other sources of strong magnetic fields like TV's. I've also seen variable track lights induce noise but it's usually minor.

Try rotating the power cord in the wall outlet.

If it still buzzes with no cables or anything external attached there's an internal problem.

Disconnect the input(s) and see if it hums in the absence of an audio source. A bad audio cable shield or unwisely-routed audio cables will allow entrance of unwanted signals from external power sources, magnetic fields, even dimmer-controlled track lights. Sometimes, simply reversing the orientation of the ac power plug can eliminate humming.

Reverse the cables Left to Right to see if it stays with the cable or the input channel. Follow it back to the source, isolating in the same manner. Eventually you will find the entrance point of the hum. Frequently a cable's ground will oxidize over time and simply removing and reattaching the cable with a twisting motion will re-establish the shield.

Buzzing is usally AC line noise leaking into an un-shielded cable somewhere or a floating ground. If the AC plug is reversible, try that. Sometimes the buzz is from an attached device. Make sure all audio cables are plugged in tightly at each end and routed away from or at right angles to any power cords and away from other sources of strong magnetic fields like TV's.

Disconnect the input(s) and see if it hums in the absence of an audio source. A bad audio cable shield or unwisely-routed audio cables will allow entrance of unwanted signals from external power sources, magnetic fields, even dimmer-controlled track lights.
I've also seen variable track lights induce noise but it's usually minor.

Try rotating the power cord in the wall outlet.

If it still buzzes with no cables or anything external attached there's an internal problem.

The switch has gon bad on you. You need to replace the dimmer switch

This, unfortuantely, is one of the usual challenges associated with dimming. The buzzing usually gets worse at around the 1/2 light level point. I don't think the issue has to do with whether the lamp is halogen, but rather how the lamp is physically constructed - and that differs from manufacturer to manufacturer. Long story short, I would take note of the lamps you purchased, and when replaced, I would opt for a different manufacturer.

you cannot fix this yourself,your audio heads and tracking may be out.need a tech to do the job.

sorry i don't have what you need but i know that dimmers and fans never work well they always buzz from the lack of power you will actually burn out the brushes in the fan in a short time.

It is a grounding issue with the turntable most likely. Some turntables came with a ground wire that you attached to the receiver. You can also try a power strip that has a line filter incorporated to get rid of the hum. Check the local stereo shoppe to see if they carry them.
You may also want to replace the audio cable that connects the turntable to the amp with a good quality shielded cable. If it has bad shielding it will pick up electrical interference and even radio interference as well.
Turntable inputs on receivers have a preamp built in and the gain for each type of pickup is different. The pickup is either ceramic or magnetic and if I remember correctly, the ceramic pickup needed more gain than the magnetic one. The preamp will definitely make a ground hum a lot more audible.

Cheers and good luck.

Best way is with balanced audio lines. Use either XLR or TRS cables IF your devices have those connections.

Also, do NOT use light dimmers as these are often a source of the higher frequencies that cause buzz.

Also power ALL the interconnected audio devices from a single source outlet rrather than from mulltiple building receptacles.

You need to change the Audio / Control Head, as well as the Pinch Roller of the machine. A worn out Audio cum Control Head will reflect in poor tracking and so will cause the above problems.