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well" for a start, they need to go into a phono socket, this amplifies them. i take it you bought 2 decks with the intentions of mixing, so you gonna need a mixer. MIXER & DECKS SET UP: 1.decks into phono channels 1&2 2. black GROUND wires, go to GND screw on back of mixer 3. RCA master / booth Outputs on mixer to AUX / LINE-IN on amp.(not phono)
In my business I work on a lot of turntables. Specifically, Memorex, Anders Nicholson, Innovative Technology and Emerson. 99% of the time when I only have sound coming out of one channel it is due to a broken cartridge. If you look at the tone arm head from underneath you will see a rubber fork that the needle arm sits in. There are usually 2 ceramic cartridges attached to the rubber fork. Those transmit the sounds from the needle. If one of those brakes then that channel will not transmit any sound.
If you put the good channel from the deck into the right and then left phono imputs of your amp, the sound should come out from the left and right speakers. If it only comes out from the left, then the amp as a right hand channel fault. Now if other devices work on both channels, then it's the pre-amp for the phono socket that has a fault on it. You should be able to find this by following the wires from the phono socket. If you touch around that pre-amp you should get it to buzz on either channel (where it joins with the main pre-amp). Doing this with a screwdriver will pin-point where the faulty part is (working backwards). PS don't short anything by touching to bits of metal together with the screwdriver.
Magnetic cartridges need a small pre-amp before they can be past to the main pre-amp. That's why you can't hear anything with the deck plugged into another line socket.
If you get signal on both left and right speakers with the above test the deck is to blame.
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
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?
OK, this is pretty easy to do. First connect your leads from the component outputs(i.e., tape, cd, phono, etc) to the recievers corresponding input for the device. Then connect the recievers outputs to your equalizer, if it is a seperate eq. Then the outputs of that to your amplifier, then your speakers to that. Be sure all of your wires are connected with the proper polarity. These instructions may be a little different for your exact setup but basically follow the same order minus any device you dont have.
If you have done some soldiering and have a steady hand, it's not difficult. If you are not sure, you could destroy that little circuit board that the lead runs to, and technics had discontinued production of that part. I'd say get it done by a pro with experience.