Question about Technics SL-1200M3D Turntable

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

I just inherited a Technics SL-BD27 from my parent's basement and it's in great working condition. The only problem is that the ground wire was removed from it and I'm obviously getting much static. I tried rigging one into that small hole beside the RCA inputs on the back but the ground issue remains.

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  • Anonymous Mar 25, 2014

    Does the system have to be grounded? I notice a screw in the back of the amplifier that says "ground." I can screw in a wire, but where would the other end be connected to?

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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.

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Posted on Apr 30, 2008

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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.

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Try this company for help?

service<remove>@turntableneedles.com

they have a help line and may be able to assist you?

Note; take the <remove> bit from the link to email them?

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I PURCHASED A LIKE NEW TECHNICS SL BD27 TURNTABLE. I HOOKED THE RCA AUDIO JACKS TO THE AUDIO INPUT ON MY SONY TV AND GET VERY LOW SOUND LEVEL WHEN TV VOLUME CONTROL IS AT MAX. REPLACING CARTRIDGE AND...


Yes you need a pre amp

It would also be the same if you connected it to a computer to record an LP to CD. Mine is a little different and has one already built in that I can switch in and out of line.

Try spend a little more if you can as many pre amps can introduce noise.

You may also want to check that the turntable is properly grounded to prevent noise too

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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:

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You have 4 wires coming from the needle pickup to the cables which connect to the amplifier/receiver. I would check the needle, the pickup unit, and the leads from the pickup to the cables. You can probably run a continuity test or ohm test for verification. If that checks, pickup and needle is your next step.

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