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 Turntables

1 Answer

How do I find a Technics SL-BD22 grounding wire?


A grounding wire is just a piece of wire connected to an earth point on the deck, connecting to an earth point say on a radiator pipe. There's nothing special about this wire any old piece will do. You only need it if you get a hum noise when the turntable is connected to the amp.

Jul 18, 2014 | Technics Turntables

1 Answer

Hi there, I have just replaced faulty rca's on my


Possible internal damage on the unit, please replace back with the old unit to confirm if the connection pins and wiring are working. If so you need to check with a new unit.

Aug 02, 2013 | Technics Turntables

2 Answers

I don't have a grounding wire and don't know what to use!


You can attach a wire to the metal part of the turntable and screw the other end to ground screw on the amp.

Mar 05, 2012 | Philips gemini XL-500 II Turntable

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 | Turntables

1 Answer

My Crosley CR246 makes a humming noise when place on Phono. The noise continues while turntable spins and adjusts with the volume button.


Remove the cartridge head shell from the arm and reinsert it. You must be having a contact problem with the cartridge. ( loose connection )

Mar 09, 2011 | Crosley CR248 Turntable

1 Answer

I have a turntable made by JVC model QL-A51. Everything works perfectly except there is no sound when you play a record. I already have a pre-amp that I use inline so that's not the issue. I thought it was...


To test the wires are working. Connect the deck to the amp and turn the amp on. Normal volume will do.
Before that disconnect all the wires to the cartridge.
Now with the amp on, touch each of the wires one at a time with your finger. On two of the wires you should hear a buzz, one on the left, one on the right. You might hear a slight hum or crackle on the two other wires or nothing at all.
If you don't hear any loud buzz on two of the wires, then the wires have become disconnected somewhere or the inbuilt pre-amp inside your amp has failed.
If you hear buzz on both channels you have either bad connections to the cartridge or the cartridge has failed.

Aug 14, 2010 | JVC Turntables

1 Answer

Continuous humming Noise in record mode


3 things to check: First, do you have the turntable grounded to the Stereo receiver, if not, make sure you do. Second, what kind of Audio cable interconnects the two pieces of electronics? Should be a very good balanced cable like Monster ILN or Phoenix Gold, or ProFlex. That alone can cause major noise. Third, Are you using a good power/line conditioning surge? Panamax, Furman,Monster all make very good line conditioning surge units. You've got an AC humm, it can be caused by just about anything in your home from a bad light bulb to a loose common wire in any AC outlet. LP's will amplify any kind of noise that's not heard on other devices. Chances are if you tune your receiver to AM you will hear it as well. Hope this helps.

May 24, 2009 | ION Audio iTTUSB Turntable

2 Answers

50Hz noise appears at the end of the disc


HAVE YOU GOT ANY OTHER EQUIPMENT CONNECTED IF SO DISCONNECT THEM THEN JUST USE THE AMP,DECK AND SPEAKERS AND MAKE SURE THERE IS NOTHING ELSE PLUGGED INTO THE SAME CONNECTING LINE
THEN ADD THE OTHER ITEMS ONE BY ONE
DEREK

Nov 16, 2008 | Philips gemini XL-500 II Turntable

2 Answers

50Hz noise appears at the end of the disc


the needle or arm is going bad, try this put a penny on the head and play, any difference? we used to do this as kids

Oct 02, 2008 | Sony PS-LX350H Turntable

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