Question about Technics SL-1200MK2 Turntable

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WEAK TO NO SIGNAL ON RCA CABLE - really confusing

I dont really know if this is the problem, but i think my red rca cable has little to no signal at all when i connect it to my serato scratch live. when i scratch forward it doesnt move or just budge a little and if i start playing the record it makes little distorted sounds. but when i scratch backwards everything is fine. i tried switching the rca connectors color coding and now it made my turntable audio scratching forward fine and scratching backward impossible.i tried to give my turntables to a technician and he soldered my RCA's problem but the problem still persists. i tried connecting it to the left deck of the serato and it worked fine but not as good as the signal i got on the right deck.
i tried switching my needles with my other turntable and it works fine so no problem in my needle wiring.

now i dont know where the root problem is, im really confused please help :(

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  • romedelarosa May 14, 2010

    insufficient information

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2 Answers

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  • Master
  • 1,851 Answers

You said "i tried switching my needles with my other turntable and it works fine so no problem in my needle wiring" that means that you changed the whole shell (from the end of the tonearm)? I think that your problem is bad fitting of the needle in the cartidge. Also check antiskating and weight.

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Posted on May 14, 2010

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  • Stelios
    Stelios May 14, 2010

    What brand - model of stylus do you use?

    Waiting clarification, don't hesitate to post.

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  • romedelarosa May 14, 2010

    what i meant was the whole cartridge. not just the needle.

  • Stelios
    Stelios May 14, 2010

    Ok, try to remove the needle from the cartridge and plug it again. I believe that it's not fully pluged in and cause these problems. Also check antiskating and weight.

    Waiting clarification, don't hesitate to post.

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  • romedelarosa May 14, 2010

    already did a couple of times bro. and did the old lick the connector posts. lol it dint woek either :( im thinking its the rca cables under the turntables

  • Stelios
    Stelios May 14, 2010

    In that case the only solution before changing the cables, is to use a multimeter and measure the resistance between the center and the ring at each RCA connector. It must be the same (I cant be absolute about the value, it depends on the cartridge you use). In the wrong case thereis a problem. I can tell you the way to locate the problem (either cables or cartridge) but can you find and use a multimeter?
    I would suggest you some technician, but you already did that with no luck.

    In case of a problem or clarification, don't hesitate to post me a reply.
    If you are satisfied, rate my solution with the "thumbs" or add a testimonial.

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  • romedelarosa May 14, 2010

    when i brought my tables to the technician we tested the rca cables for short issues and its working fine using ohmmeter. but im not sure about the rca cable connected beneath my tables if its the root problem. im confused as to where to start but rca cables and carts is an idea..

  • Stelios
    Stelios May 14, 2010

    In case you can "co-operate" with the technician I have to suggest this solution:
    Connect the multimeter (ohmmeter) at EACH RCA ends and measure the resistance. With the multimeter connected move slowly - slowly the tonearm all the way (from start to end) to see possible loss of continuity. Check the other RCA (channel) too with the same proccedure. That way you will check the full cable length included the cartridge and the inner cables at the Technics' body.
    In case you want to check just the cables and not the cart, make a temporary short circuit with a piece of cable at each channel's end (at the cart's side) and repeat the above procedure.
    Of course the results should be better if, instead of moving the tonearm by hand, place a record on the platter, place the needle on it and start to spin (don't worry, the multimeter will not be destroyed by the signal)... In this case you will need a lot of patience to keep your eyes on the multimeter...

    In case of a problem or clarification, don't hesitate to post me a reply.
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    Stelios
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  • Master
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You can test the cable with an ohmmeter in the ohm setting. If it has really good resistance and matches the same as the others, then you could have a failing capaictor on the electrical board.

Posted on May 14, 2010

  • 1 more comment 
  • romedelarosa May 14, 2010

    earlier this week i also had my electrical board fixed since ive accidentally plugged my 110v turntables to a 220v. so yeah theyve changed my capacitors and do some rewinding. i tried my turntables and it worked fine for a couple of hours and i took a break and unplugged everything, then i came back to do some more music work and when i plugged everything right back in, i started to get the problem. if its my tonearm connection to my needle, my rca connection. technician just fixed my rca and tested it that it has no short issues. some said im getting getting a strong signal on one channel. ive also noticed that the technician didnt cut the rca's in 6". sorry im new to this stuff. please help

  • Nate Stansfield
    Nate Stansfield May 14, 2010

    If the electrical board and rca cables test to be ok, double check your needle, the wiring to the needle and the toner and the arm that is attached to the needle

  • romedelarosa May 14, 2010

    would my problem be because of my rca cables beneath my turntables? need to be resoldered? would that make any sense? hmm..

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