Single sided sound from my RCA/Phono leads

I just had a similar problem and subsequently replaced all leads etc. I found out (yesterday in fact) that there was both a defective red connector in the headshell and the actual connection itself wasn't as tight as it could be. Since doing that, hey presto, both decks both channels are working.

If you are certain the new leads/RCA cables and the soldering work was done properly, and you've determined that the issue is from the turntable and not your mixer.

Then there are 2 other factors that could be causing this issue:

1) Bad Tonearm - look inside the tonearm, where the cartridge/headshell mounts. You'll see 4 prongs. Make sure those prongs are protruding and they all look even. They must also be a nice shiny brass color. If they are dull and/or black, try cleaning them out with an contact cleaner (CAIG Lab DE-OXIT works good) made for electronic components. If any of the prongs appear to be pressed in, try to see if you can get it to bounce back. Those prongs are spring loaded, and sometimes the springs get misaligned. Of course, they also tend to dislodge. If that's the case, then you will need to replace the tonearm altogether.

2) Faulty Cartridge / Headshell - Make sure your cartridge & headshell work properly. The easiest way to do this, is to swap your cartridge with a working one. If you have 2 turntables, just swap them out, and see if that changes anything.

I am going to say, it's more than likely a tonearm issue. There really isn't anything else, other than the Tonearm and RCA's which would cause sound issues. The Circuit board will not affect your sound, unless you burned it, or damaged it in some other fashion when replacing the RCA cables.

As for a Service Center in the UK, not sure of any, but you can contact Panasonic, which is the parent company of Technics - www.panasonic.co.uk - go to the Support Section for a list of auth service centers in your area.

- TWEAK AV LAB
The ORIGINAL TURNTABLE Technicians