Question about NAD 533 Turntable

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My very old NAD 5025 got a hum noise problem

I replaced the old wire. The connections are using connections device bewteen the arm's wire and output which iron'd directly. How do I fix it ?

Y.K.

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Check the motor shaft. It could be bent making the pully wobble which makes the whole turntable vibrate which gets passed through the needle. I just found this out on mine. Easy way to test is to hold the platter while the needle is resting on the record. The speakers will hum/wobble at a low frequency. Lift the needle off the record and the sound stops? It's the motor...

Posted on Dec 10, 2010

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I get an intermittent loud hum using NAD AV316 amplifier, with stereo speakers(B connection) with phono input from Dual 606 turntable. Hum increases/changes when tone arm on turntable is touched.


The hum of course is the 60 cycle line AC voltage. Make sure that the routing of the AC power plug is as distant as possible from the stereo RCA cables.

The most likely problem is the connection of the phono cartridge to the wires in the arm. These connections usually are silver plated and become oxidized creating a bad connection. Remove the cartridge and using a fine eraser polish the connections. There is a ground connection that makes the five wire connection. Be super carfull these terminals are very easy to break

The phono connections to the stereo is very low voltage subject to interference. The connection to the magnetic pickup at the tone arm is low impedance and is inductive. Any poor connection between the cartridge up to the AV316 will produce this hum. Continue to check connections and swap cables with a known good to resolve.

I have switched the left and right cables to ensure that the cable is not the problem.

Hope this helps?

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Sep 26, 2016 | NAD Audio Players & Recorders

1 Answer

Sparks from the speaker wire and no sound through the left just a hum


Audio output amp section circuit to your amp [left] has damaged. Check and replace damaged component/s there. The work will is a skilled one. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/

May 11, 2014 | NAD Audio Players & Recorders

1 Answer

I have a Dual CS714Q turntable with a constant hum on output. Any suggestions?


Hello!
Did you connect single black ground wire to the "ground" terminal at your amp? Probably not! Or, it got stepped on it, while moving around. Professional of hi-fi turntables using magnetic cartridges and require 2 well shielded audio cables, connected directly to the cartridge, plus separate ground wire, which attached to all the metal parts of tone arm and body. Failure to connect this wire to the body(metal) or the amplifier, will cause this loud "hum".
thanks,
Alex.

Jan 11, 2012 | Audio Players & Recorders

2 Answers

My nad 3020 is making a buzzing noise when i connect to peakers even when nothing else is connected to it. any solutions ?


Hi,
you may have a bad Earth power 110 V AC cable connection which makes such hum / buzz even nothing connected..
Check the connections between components and make sure they are secure before proceeding to the next Step. Sometimes, loose connections can cause a hum.
  • Separate the audio cables from the power cables; electromagnetic interference from the power cables can cause stereo hum. Use cable ties to secure the audio cables away from the power cables.
  • Plug in a surge protector to the outlet, and then plug all the components into that surge protector
  • Connect a ground plug to the surge protector and then plug the ground plug into the main outlet. A ground plug is available at any hardware store, and turns a three prong connection into a two prong. Ground plugs help eliminate 60 cycle hum.
  • 5 Connect the ground wire from your turntable to the ground wire connection on the receiver. If this doesn't work, looking on the back there should be a grounding point,

    Unplug your receiver.. Split a wire and attach one of the splits to the receiver where you will see the text, "ground" or something similar. Attach the other end to something metal such as a pipe that goes into the ground. Secure with electrical tape. Plug in.
    connect the ground wire to a screw on the electrical outlet.


  • Read more: How to Fix a Hum on a Stereo Receiver ' eHow.com http://www.ehow.com/how_5183193_fix-hum-stereo-receiver.html#ixzz1PpFHs1Mv


    Take care and please remember to rate "AS THUMBS UP" Thanks

    Jun 20, 2011 | NAD Audio Players & Recorders

    4 Answers

    When then amplified is turned on, it generates a humming static noise. it plays music, along with that humming noise. would it be possible for us to receive the schematics of this model at...


    What amplifier is this? Humming noise is normally caused by video cables in audio ports, high voltage wires too close to audio wires, or ground loops.

    Feb 25, 2011 | Audio Players & Recorders

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    Nad c270 power amp transfomer hum


    if the hum is in the sound output you have a blown power regulator

    Mar 31, 2010 | NAD C270 2-Channel Amplifier

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    NAD S300 Amplifer humming


    You have either got a bad earth connection, or possibily there's a capacitor failed.
    If you can't find a dodgy conection, I would replace the large Electrolytic Capacitors in the power section, they are used to take out 50hz hum in the mains electric, when they go you get that hum coming into your system.

    Nov 15, 2009 | NAD S300 Amplifier

    1 Answer

    Can I connect a power amp to this unit?


    If your 2100ES has a selectable INPUT AND OUTPUT and if you're intending to send all signal to the power amp, i.e. not bi-wiring or using the 2100ES to run mid-range or treble then you simply send Left & Right audio (White & Red cable) from a 2100ES output, probably AUX OUT ( it doesn't really matter apart from Phono on some units) straight to the power amp on AUX IN.
    We should be just dealing with audio here, so connect the NAD audio output to CD or DVD IN. Select CD or DVD IN on 2100ES input switch and switch output to AUX OUT (whatever you decided goes to the power amp) on the 2100ES. Turn power amp to AUX IN and it will now get an audio signal from the 2100ES for amplification.
    Speakers connect to the power amp as a normal amp, so pos and neg etc. The 2100ES now only acts as a signal feed, the power amp does all the work.

    So, summary - switch on the NAD, press play - video goes separately and audio goes to the 2100ES. Turn 2100ES to INPUT for NAD. Turn 2100ES to OUTPUT allocated for power amp. Turn INPUT on power amp to allocation for 2100ES.

    Turn it up!

    Jul 27, 2008 | Sony STR-DA2100ES Receiver

    1 Answer

    Gemsound power speaker pxa105


    First,
    Disconnect any input cables from the amp. Turn down the volume controls and disconnect the speakers. Power back on. If you still blow fuses with nothing hooked up, have the amp fixed.
    If the fuse holds, shut down and connect the speakers, leaving the volume controls down. Power up and see if your fuse holds. If you have hum, an output transistor is most likely shorted. If you have no noise, SLOWLY turn up the volume controls and listen for the hum. If all is quiet, turn down the volume controls and connect your input cables and turn the volume back up. Noise? check your cables!
    Mister Phil

    Apr 07, 2008 | NAD C350 2-Channel Amplifier

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    Nad 302 amplifier


    sounds to me that the vol control has lost its earth end connection So yes its a problem with the dial control You couls try some contact cleaner But better still lift of the lid and base if possible while the amplifier is not plugged into the power socket and see if you have a dry joints around the vol control pot regards Trev

    Mar 14, 2007 | NAD CI9060 Amplifier

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