Question about Technics SL-BD22 Turntable

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No Sound out of Left side

The left channel does not produce sound anymore - well to be more accurate: it's very, very faint with a lot of low end hum to it.

I've checked the stereo itself, the speaker cable, and the speaker - they all work fine.

Anyone have any ideas? Thanks so much

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Re: No Sound out of Left side

Is it possible to swap the left and right wires on the needle cartridge? does the sound change sides? if yes bad cartridge if you still only get sound from right side try changing around the rca phono plugs

Posted on Jan 04, 2008

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Actually it's not to hard to connect them. All you need is a stereo record where you know a sound of something is on the right or left channels. I use to have a Goodies LP where a one of them would say "bounce to the left" and the other said "bounce to the right" these coming on the respective channels.
To set it up just stick the red (right) on one of the cartridge pins and white - left on the opposite side - not underneath it. Then connect the other two to the pins below them. Play your test record. And if the sound which is supposed to be on the right channel come on the left - swap the two red and white wires around.
If the sound sounds (tinny spaced) out then swap the same side wires around.
So if you have say Red Green, Make it Green Red. If it is tinny only on one channel, don't switch the other channel around.
For example the right is tinny - do the above - but leave the other White Blue.
By the way some cartridges do have L and R marked on them and + and - for the channel types. " -" being for the green or blue wires.

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Sound only from one channel

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.


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.

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