The wire on the phono player PL-203AZ is not connecting to the receiver Pioneer SX312-R . I have wires to connect to Red and White from Phono to Receiver and another wire on Phono but the receiver do

The yellow wire is for composite or rca phono type video connection.
Red and white are for stereo left and right audio. These are standart color codes to avoid confusion. Yellow is video. But these colored wires are all the same and can be used interchangeably if connected to their respected ins and outs.

You need to hook it up to another analog input other than the phono input. The record player has a built in preamp, and the receiver's phono input has a separate preamp for non-amplified players. You cannot have the two hooked to each other.

receivers with a PHONO input can connect a turntable easily by just connecting the white and red stereo audio cables from the turntable to the phono inputs on the receiver. receivers without a PHONO input can still connect a turntable by using a phono-preamp whose output can connect to any analog stereo input on the receiver like CD or AUX. See this webpage for more info:
http://columbiaisa.50webs.com/turntable_to_pc_hookup.htm

The red wire is the right channel, so going back to your amp, get a single phono plug with with the wire exposed, so you can touch the wire. Then remove the turntable connections. With the amp on plug the the lose wire plug into each channel and check if the sound on the right is still low. If it is then there's a problem with the magnetic cartridge pre-amp inside the amp. They are often located near the phono socket on a seperate PC board, but if not just follow the red wire to the main board. Chances are it will be an IC that's failed.
If it has a strong buzz at the back of the amp. Then I should replace the wire between the turntable and the amp. Or the right phono plug that connects to the amp.

hi you need a Phono Input Attenuator Line Adapter
the above link is for one on ebay but they are also available through radio shack

PL-600 TT to the Phono input; PD-M423 to CD input; Cassette Playback to Tape In; Cassette Record to Tape Out

Hi...
If the new receiver doesnt have a specific input in back labeled "phono" , You WILL need a preamp for the phono. Then plug the preamp into the AUX or other available input

depends what audio outputs you have on the sky box,analogue (two phono usually red for right channel and white left channel)in which case just use phono leads to the phono inputs,Optical(toslink),connect an optical cable from the output to the optical input on the dvd channel of the pioneer,coaxial (spdif)connect to spdif input on the laser disk input of the pioneer,dont connect to the attenuated spdif.In the unlikeley event of the sky box not having any audio outputs,just use the outputs from the tv to the pioneer.The optical digital input gives the best quality on the vsa eo6

No phono inputs?? You will need a phono to line level preamp to use aux input.