Question about Technics SL-BD20D Turntable

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Sl-db27u technics form the late 80's Ground Wire

All this time I didn't know anything about the ground wire. I looked at the back and I don't have one. I cant seem to find one -anyone know how to do this? I do have a loud HUMMM when I turn the volume up and I also hear a very low radio signal coming out of the speakers.

Posted by Kyle on


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Tom Chichester

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  • Technics Master
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I just checked my Technics turntable to be sure and there should be a thin black wire that comes out of the rear where the AC line cord connects. If you don't see a wire, someone may have clipped it off. You may have to disassemble you turntable enough to get access underneath and install a new wire.

Posted on Nov 30, 2013


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  • 515 Answers

SOURCE: Where is the ground wire connected to on the Technics SL-BD27?

You will more than likely need to wire it up from the inside of the unit, unfortunately. Parts for this model are discontinued. You can also try an iPod cable. As the size is a 1/8" plug - same as an iPod cable, then just cut the other end, and ground to your receiver.


Posted on Apr 30, 2008


Graeme Ross

  • 1512 Answers

SOURCE: Technics SL 1210 feedback/grounding problem.


It is most likely you have an acoutsic coupling to the decks from the work surface, mixer, or a roadcase. If any part of the body of the deck is touching anything else, then you will get rumble and acoustic feedback problems. the deck should rest evenly on its own 4 legs, clear of anthing else. Technics sl1200 series decks are the best in the world for acoustic isolation. There will always be some feedback from your decks to speakers. However, only with a really high powered system should give you problems, DJ booths are sometimes suspended from the roof just to eliminate this rumble.
A 1/3 octave EQ (31band) can also be effective at reducing feedback.


Posted on Jun 10, 2008

A Miller

  • 8404 Answers

SOURCE: Ground wire disconnected on my technics SL-1200 M3D

to any metal part of the frame

Posted on Oct 09, 2009


  • 1 Answer

SOURCE: Technics SL-BD22 ground wire does not reduce hum. Any solutions?

I have found out that the female phono plugs on the turntable are sensative and have to have a solid connection and often adjusted from time to time to eliminate the 60 cycle hum.

Posted on Nov 04, 2010

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Looking for ground wire for Technics SL-B260U Turntable

There's nothing special about a ground wire! All you need is a piece of single standard wire that connects to an earth point on either the receiver - generally a screw terminal, or a earth point in your home. Say a metal pipe. Any electrical shop will have a strand of wire that will do the job.

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Usually, on Technics turntables, the ground wire is attached to a ground lug on the receiver.

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Dec 30, 2013 | Technics SL-BD22 Turntable

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I dont have the orginal ground wire for my Technics SL-BD20D turntable someone told me i could use rca cables to ground it, i have a pre amp cause my main amp didnt have phono jacks on the back of it.

You don't need the original ground wire for Technics SL-BD20D turntable,
any plain cable can be used for this purpose...
you should connect turntable to your pre amp,should be a "phone" input at the back...
here are some suggestions for grounding....
  • 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.
  • 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.

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    Jun 22, 2011 | Technics SL-BD20D Turntable

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    My technics 1200 hums when connected to the amp even when the power cord is disconnected.

    Is the ground wire from the deck connected to the mixer?.

    If everything is connected ok then the ground wire or phono cord could be faulty - look here for replacements :-

    Could also be a "ground loop" - try a ground loop isolator.

    Jun 26, 2010 | Technics SL-1200 Turntable

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    I just purchased a Technics SL-BD22 turntable and it came without the ground wire. Is there anywhere I can purchase this proprietary part?

    just get any small speaker wire and use that as your ground , attach that to the reciever you are using

    Jan 16, 2010 | Technics SL-BD22 Turntable

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    New RCAS on Technics 1200 Getting a Loud Buzzing Noise

    It is not suggested that you remove the ground cable. Performing the mod for the ground by soldering a bridge on the circuit board doesn't really do anything either than remove that buzz/ground hum. You've essentially removed the wire that grounds the turntable cabinet to the earth. The buzz is gone, but now your turntable is no longer grounded properly.

    I would suggest replacing the ground cable to it's original state, then attach the Monster cables.

    If this does not work, then either there is an issue with the soldering to the board, or the board itself might be damaged. You might want to look at the trace paths to make sure none are lifted, or damaged in any way on the board. Another issue might be faulty tonearm wires or not properly soldered wires.

    FYI, monster cables are not good for this purpose. I would suggest the following cables:


    - OPTiC

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    Technics SL-BD22 ground wire does not reduce hum. Any solutions?

    presuming it has "some" effect, then gnd wire itself it good. Even though there may be a gnd thumbscrew on the preamp try slipping the ground wire under a screw on the main amp or receiver that screws into metal and make sure the gnd wire is touching metal under the screw.

    if that didn't help, then you may have:
    >a cartridge with an open gnd internally.
    >an open gnd wire from the back of the cartridge to the outer shields of the RCA connectors.
    >or your neutral & hot wires of your house wiring might be reversed causing something weird.
    >a low quality preamp. (it should have a seperate wall adaptor so that only low voltage dc goes near the preamp)
    good luck ground issues can be tough!

    Feb 06, 2009 | Technics SL-BD22 Turntable

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    Where is the ground wire connected to on the Technics SL-BD27?

    You will more than likely need to wire it up from the inside of the unit, unfortunately. Parts for this model are discontinued. You can also try an iPod cable. As the size is a 1/8" plug - same as an iPod cable, then just cut the other end, and ground to your receiver.


    Jan 09, 2008 | Technics SL-1200M3D Turntable

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