The first answer is correct. If the bad channel doesn't play, no matter where it's plugged into, left or right, on the phono input. the amplifier is bad. This will require a major repair, by an audio specific tech. A transistor of IC may have gone bad in the phono preamp section only. I assume it doesn't do this with another input? If you need more assistance, or would like to inquire about a repair, please visit my website, at, audioserviceclinic.com. You can chat with me there. Additionally, the comment stating that the turntable can be diagnosed without taking it all apart, is completely wrong. You have proven this yourself. Thank you.
If you switch the cables so the left channel plays into the right of the amp and the sound stays dead in the left channel of the amp it's not the cartridge that is at fault by your amp. Amps have a magnetic cartridge pre-amp built into them for turntables. This can go faulty, but won't effect any other device (CD etc). Most of these pre-amps are a single IC. Which will need to be replaced.
Testimonial: "I'm an old hand at this :) the left channel on the TT doesn't play irrespective of where I plug it. I use a tube amp and a phono stage, the problem is with the TT, and one I haven't encountered previously! Thanks for your time and input, pun unintended. awaiting my replacement stylus and cartridge, and then I'll know the truth of the matter. Also plugged the TT into my two other vintage Sansui amps, same problem!!!!"
SOURCE: SL1200 MK5 NO SOUND FROM RIGHT CHANNEL
Issue is either your tonearm or your RCA cables. Unfortunately, there is no easy way to determine which is the problem. I would suggest replacing the RCA cables first, as it is the least expensive. If it does not solve your problem, then the issue is with the tonearm.
You can also do this for now:
Remove your headshell/cartridge from the tonearm. Look inside the tonearm tube, you'll see 4 gold prongs. Make sure all 4 prongs are protruding, and are 'shiny'. If they are not, then the issue is with your tonearm. If they look good, then more than likely, the issue is with your RCA cables. Taking it to a qualified repair center will help in determining what is the issue, but they will need to open your unit to test, so be prepared to pay for the estimate right off the bat.
If your in the NY Metro area, look us up. We also offer nationwide service, if you cannot find anyone local:
http://www.tweakrepair.com
DJPROAUDIO
TWEAK AV LAB
SOURCE: pioneer pl-200 turntable one channel is dull and muffled
I think we need to do more diagnosis. Did you try swapping the channel cables Left-to-Right so you're sure it is in the TT and not in your Phono preamp?
If it's still in the TT and always on the same channel with two different cartridges you probably have a wire problem in the tonearm/shell or interface between them.
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tried every swap possible, the TT is as good as new, the tone arm pins are nice and shiny, even plugged in my spare phono pre amp, and the problem is cleary with the TT. I should recieve my new cartridge and stylus next week and will try that too. Then I'll take it to an engineer. we don't have authorised people in India, sadly, but I have a good, reliable chap to check it and repair it for me! thank you all!!!
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