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I have a Thorens TD115. The left channel doesn't

I have a Thorens TD115. The left channel doesn't and I reverse the poles, I get no sound at all

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I am basing my findings on my THORENS TD166 MK2.
First thing you have to do here is check the wiring from the headshell to the RCA phono leads - for this you need a multi-meter set on continuity.
Disconnect the cartridge and put one meter probe on one of the headshell wires and the other to the centre pins and outer rim of the RCA plugs. One headshell wire should read fine on one part of the plug as it will correspond with ONE part only of the RCA plug. When you have checked all wiring and you get a continuity check (OK) then you must look to the cartridge.
However, if you get a reading of ONE headshell wire reading more than one part of an RCA plug then you may have an internal wiring problem in the deck.
Here is something that might help:
RED - to centre pin of right output plug GREEN - to outer metal rim of right output plug WHITE - to centre pin of left output plug BLUE - to outer metal rim of left output plug In some cases this wire may be black
Just to recap, if these readings are OK - the cartridge may be at fault.
I wish you well with it!!! (:-)

Posted on Sep 26, 2009

Testimonial: "Thanks for the help. As a matter of fact I spoke to a Thorens distributor who told me that more than likely I need to replace the RCA plug and wires."


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Disconnect the wires from the cartridge. Then with the amp on touch each of the four wires with your finger. You should hear a loud buzz on two of the wires one on each channel. If you don't then the connections could be faulty. If you can hear the buzz, get someone else to move the wires connecting the deck to the unit. If you loose the buzz then something is poorly connected.
If all is good and the buzz is present no matter what you do, then either you have a bad connection to the cartridge or the cartridge is faulty.

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The (+ve) & (--ve) poles of the connection wires have neen reversed is the meaning. Just interchange the wires of each either at speaker box or at the output terminals of the amp. If these connection are reversed, the sound effect will vary in intesity. OK.

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One is earth for the right, one is earth for the left, one is right channel and the other is left.
You don't need to know the colours to find the left and right channels. Just connect the turntable to the amp switch on. Then with your finger touch each wire one at a time. One will buzz on the left the other will buzz on the right. You might even get a slight buzz from the two earths.
The cartridge might have the left or right channels marked so you can connect them, but if it doesn't just connect the left to one side and the right to the other, then do the same with the earths. try it out, if the channels are the wrong way round change them, if the sound doesn't sound right change them again and again till it sounds right. You won't damage the amp or cartridge from doing this. Unless it's some kind of static effected cartridge!

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Hi, here is a procedure to discover the source of the problem. No sound from the left front channel can have several sources other than the left front channel itself.
Let's assume, for just now, that the speaker is good and the cable to it is good.
Here is a testing sequence to follow:
1 If you have a CD player connected to it. Put a CD in and put it into play mode.
2 reverse the connectors from the CD player to the receiver. See if the sound moves to the left speaker and stops on the right speaker. Or if it plays fine.
3 If the sound reverses channels, That cable is bad. Replace it
4 If the sound is still not coming from the left channel. Check the connections and cables to the speaker. MAKE SURE THERE ARE NO STRANDS OF WIRE TOUCHING THE CHASSIS OR SHORTING TO THE OTHER SPEAKER WIRE.
5 If there were. Correct it. Shut down the receiver and then after a few minutes turn it back on.
6 If it still does not work. check to see if a tiny amount of sound is coming from the left speaker.
If so, turn the music up and see if it pops back on . If that is the case there is a failed resister on the circuit board that is arcing when you turn up the volume. That being the case, it is time to drop off the receiver to be repaired in the service center.
Hope this helps,

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I am not an expert but know of someone who helped me in the past with a Thorens TD115. This fellow Dariusz at Q-Audio will be glad to offer some advice. Why not give him a call at 617-547-2727.

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I am having a very hard time finding technicians willing to work on my Thorens td-150 table. I live in Brooklyn, NY, any suggestions?

Try asking the following people for someone close to you.

2 Channel Distribution
1500 South 9th Street
Salina, KS 67401
Phone: +1 785-820-2931
Fax: +1 785-825-0156
Address: 2 Channel Distribution
1500 South 9th Street
Salina, KS 67401 Phone: +1 785-820-2931
+1 888-5-ANALOG (dealer sales) Fax: +1 785-825-0156 Email: salesat.gif2channeldistributiondot.gifcom Website:

I'm guessing the turntable may be pre 1999 in which case you may have to try the following German contact.

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