Very soft sound coming out of the speakers when playing a record

SOURCE: Technics 1210 feedback/grounding problem

Since you've already replaced your RCA cables, and tried different cartridges, the only other thing that would cause this type of issue is your tonearm. It's probably on it's way out, and will need to be replaced shortly.

You can obtain a replacement tonearm HERE, however, it's rather difficult to replace the tonearm without experience or knowledge on soldering.

Good luck!

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DIGITAL ANALOG THERAPY

SOURCE: Technics SL-L3 turntable no sound until warm up

either the cartridge is bad in the phonograph tone arm.  Or the pre-amp in the stereo is bad...remember that the turntable is the only accessory that uses the pre-amp input on the stereo.  I'm betting the pre-amp is bad.

SOURCE: One of my turntables only has sound coming out of left speaker..

one of your phono leads ether red or white is nakered.plug them in one at a time and see witch ones workin,then youll no the dodgy one.when you pull out leads from your mixer you can sometimes break cables free from the fittings if pulled by the wire.you wanna re soilder a new lead on to deck or pull back the sheath plastic covering the fitting and reconnect the cables(the insulated wire goes to the pin an the uninsulated goes to outside ring)gd luck

SOURCE: Buzzing from one Technics MK5 1200

where can i get the technic 1210 mk5 internal wires in the tone arm that connect to from the circuit board to the needle (the really long one inside the tonearm)

SOURCE: record only plays through one speaker

If it works on Channel One it is NOT the TT. It's a mixer problem. Define the mixer and what else works or doen't work. have you tried another device on Channel 2?