Question about Technics SL-1200MK2 Turntable

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No signal from the Left output + Tinny sound

Got 2 different problems with 2 turntables.

1. No left output from one deck. Ive swapped over my cartridges and the problem still persists - any ideas?

2. Output from deck sounds very tinny. Ive tried different cartridges and the same problem persists - any ideas?

Thanks

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  • 185 Answers

1. Assuming there is no problem with your amplifier of input cable, the headshell/tone-arm needs rewiring. This is very thin flexible wire and not easy to do, but can be done if you are careful.

2. Turntables require a special input on your amplifier which has a frequency response that is suitable for them. If you connect a turntable to an ordinary input, it will sound tinny. If you don't have a turntable input (known as a phono input [from phonograph]) you will need to use a preamplifier with your turntable.

Posted on Mar 17, 2008

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If you disconect the wires to the cartridge and with deck plugged in to the amp and switched on, you can touch the ends of the wires with your finger. Though there are four wires, only two should produce a buzz, one in the left, one in the right speakers. If you get a buzz in each channel, the rest of the unit is working fine and you have a faulty cartridge or a poor connection to it. If one channel remains dead, then you have a problem in the wires to your amp or an internal fault inside the deck. If internal I suggest you remove the bottom of the turntable and have a look around.

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1 Answer

1 X 1200Mk2deck higher volume / causing spkr not to work..


Problem If you swapped the two TT's would the problem stay with the connection on your mixer? At least then you/we would know wherein lies the problem. I'm betting thge low volume is because you have the phono jacked into a line level input like AUX instead of PHONO.

Typically, what you're describing is a phone source plugged into a NON-phono connection. (Tinny, low volume - classic lack of a phono preamplifier with RIAA equaliztion). A standard old-school tuntable requires a phono preamp that is labeled "PHONO". Nothing else will give it the boost and freq response correction LP's and phono cartridges produce.

Your problem #2 alludes to a channel problem with a turntable running through your mixer. This isn't rocket science. Swapping the two turntable channels around would probably change the apparent failing channel, right? Yes - Problem out at the turntable. No - problem in the mixer. You've already hinted at the source by monkeying with the tonearm wiring. You're on the right track. The tiny multi-colored wires in the cartridge shell are very thin and delicate. Their brass fittings sometimes oxidize and reseating them as you have done usually gives some relief. Kinks in the wires could cause your intermittent symptom. At the RCA end of the tonearm cables, make sure they're seated on with a twist to wipe off oxide.

Problem #3. Is it just bothering you or is there a functional problem, too?

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Well, number #1 - it's a Gemini. So, you can rest assured that the craftsmanship is not the greatest. It's hit or miss with this company.

#2, if the issue you are having is a ground issue, then perhaps the internal ground wire might have come loose, or there is some sort of interference somewhere. Do you have your turntables next to anything that draws alot of power? Such as air conditioner, or a microwave, fridge, etc? Also, connecting to the same power outlet with something that draws alot of electricity might have the same effect. Try a different power outlet. One that is not being used if possible. If you use a power strip or extension cord, try a new one.

There could be many issues which cause feedback.. the main thing is to determine what is NOT causing the problem. So, you know it's NOT your mixer. Great. Now, move on to the next step. Check your cartridges also. Try swapping them out, see if the problem follows. Many times the tonearms aren't grounded properly. There are 5 wires coming out from the tonearm - L+, L-, R+, R- and GROUND. If the ground came off during transport, or movement, this might be your problem.

Good luck!

- Davis
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DIGITAL ANALOG THERAPY

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No, the issue is either with the RCA cables or the tonearm. You might also want to check your cartridge and headshell connection. Make sure the contacts are nice and clean, and securely on the headshell. Have you tried swapping out your turntables? Take the left turntable, and put it on the right channel's input, and vice-versa? This will tell help isolate the issue. If the problem just moves, then we know it's not your mixer. If the problem remains on the same side, then you know there is something wrong with your mixer.

If the problem moves, then you can safely say it's your turntable with the issue. The STR8-30's aren't the greatest quality, so it's also possible that you have a faulty tonearm or RCA cables.

Hope this helps.

DJPROAUDIO
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