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Re: hissy and distorted
On the 1200s, there really isn't anything that would cause such an issue unless you have a bad tonearm, or faulty RCA cables. If you've isolated the issue to the unit, and not the cartridges/styli/headshells, then the only next course of action is to have your RCA cables replace, and if the problem persists, the only other faulty part would be the tonearm. You can purchase parts for your 1200 HERE, however, soldering skills will be required if you are going to attempt to do this yourself. Also, a word of caution, the Tonearm is not easy to replace, so you might need professional assistance with this one.
Also, if you can ask the previous owner if any work was done on the units, perhaps it was a self-repair, and was not done correctly, causing these issues.
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The record deck is played through a separate pre-amp to all other functions, so it therefore could be a fault in that pre-amp, but I doubt it. You can fit a wide verity of cartridges in record decks that will each give a different response to the sound. But first check that the cartridge connections are correct. Try swapping them around, it might change what you get. But it could simply be that you have a cartridge that produces a lot of bass. Changing the cartridge to a high quality recommended type - by say some hi-fi buffs website or magazine, might solve the problem.
I must say I have never come upon a record deck that will only play one side of a good condition record!
The only action I can suggest is to replace the belt if it's a belt driven deck. Please make a note of how it fits before removing the belt. But why any record deck would treat a new record any different on one side than the other will be a mystery to any good engineer.
The only exception would be if the deck played one side good then played up on every other record. Till it's switched off for a while, then repeats this action.
The cause of this fault would be a part overheating the longer the deck is left on. When you stop it to turn over, the system fails. This is however more likely to happen on a direct drive turntable, not a belt driven one.
You will probably have to take the bottom off to see what is happening inside. The thing could have been tampered with by someone try to fix something. So it's not something that you know was previously working. With a bit of luck it might need a bit of grease to get it going. But you never know with a second hand model!
You don't say whether you have only just acquired this deck or if you have been using it for some time and it has only now started to give problems.
There are 2 or 3 possible explanations.
If you have only just got this deck and are using it on a stereo that has a dedicated phono (record player) input it may be that you need to get inside your turntable to turn off the built in pre-amplifier switch. To do so make sure the tone arm is securely fixed into it's holder (a rubber band will hold it in tightly) before turning the deck upside down and unscrewing the bottom.
If you have just got this deck and are trying to play it through a stereo system that does NOT have a dedicated phono (record player) input you may need to get inside the deck to turn the phono pre-amplifier switch on.
And if the deck has been used for some time this is the most likely - the record stylus (needle) probably needs replacing. Personally, although it is a bit more expensive, I prefer to replace the whole cartridge rather than just the stylus as they do need changing from time to time anyway. Always replace the stylus at least at the frequency recommended by the manufacturer. Regularly clean the stylus with very gentle strokes from the back towards the front using a small soft brush.
The only thing (I think) that would cause a 45 to play badly and the 33 not, is either the cartridge or stylus, most likely the stylus. It's either worn or damaged, so it fits badly in the larger grooves of 45's then the smaller ones of 33!
The signal coming from the cartridge is the same on 45 as it would be from 33.
If the cartridge is good and your wiring is good. Then it's either got to be a fault on your amp, or there is a pre-amp in the deck itself faulty. Double check that the amp is working, amps have a pre-amp for record decks, they cause trouble a lot.
If you touch the wires that connect to the cartridge, you should get a buzz on either channel (remove them from the cartridge first). If you don't get a decent buzz, and you know that the amp is working fine, then there's something inside the deck causing the problem. In which case take the bottom off and take a look inside.
are you running phono pre amps ? are you running pre amps to each deck or one for both decks , if you are running pre amps maybe the power supply is not sufficient to run two decks anymore [ possibly damaged ] but it sounds like a power delivery failure to me . hope this helps