Question about Technics SL-1210 Turntable

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Sound only from one channel

HELP!!!! So I am only gettin sound from one channel on both of my turntables. They are only about 2 years old as i got the for X-mas in 2005. I have checked everything i know to check and have found that the pins inside the tonearm when the needle cartridge connects are rusted, carodded, or something to that extent. Is there an easy fix to this or do I need to get new tonearms for both. I have heard rubbing alcohol and a q-tip but nervous to do anything as to not screw them up more. Please someone help me

Thanks

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Get hold of a multimeter and check the resistance from the leads in the shell (when connected to the tonearm) to the plugs at the other end of the cable. It should be zero or very near to zero.

Measure the resistance of the cartridge itself on both channels to see if it's at fault. Moving magnet cartridges should give somewhere between 500 and 1000 ohms, Moving coil a lot lower.
Use a high resistance setting in the multimeter to start with.

Color codes for headhell wiring:

Red = Right signal
Green = Right ground
White = Left signal
Blue = Left ground

When you measure much higher resistances or open circuits cleaning is indeed needed.

I clean small contacts like these with a fiberglass brush, which I think is/was sold as a sort of eraser in office supply shops, with a bit of alcohol on it.

Sound only from one channel - d366334.jpg

You won't screw up anything by cleaning up a bit as long as you don't use any agressive cleaning fluids, plain old alchohol and gently scraping of the gunk will do.

Hold the cable ends with the clips firmly between tweezers and scrape around in them. When they do not fit snugly on the cartidge anymore after cleaning just gently squeeze them together a bit before re-installing the cartridge.

Posted on Jan 15, 2008

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Posted on Jan 02, 2017

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Here's a solution to see if you have a problem with either your receiver or turntable.
The turntable has 2 RCA's one red for right channel, and one white or black for left channel, which plug into the back of the amplifier.

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