The left channel in my 1200 isn't working. I've checked all the connections at the base of the tone arm and they are all connected securely. I've cleaned the phono connections. I am however a little suspicious as the right channel in my other turntable isn't working. Any suggestions can ? can the channels in turntables become blown?
I have had the same problem on my 1210 MKII. I have taken it apart a number of times to replace the original lights with LED's, and naturally thought I messed something up in the reassembly. I actually found that the problem was in the connection between the tone-arm and the pick-up "housing".(Pardon my bad english) There is a little rubber band in between, and sometimes you have to unscrew the "housing" flip the rubber band, and screw it back on pretty hard. Also try cleaning the four contact pins before screwing it back on. I have heard of quite a few having this problem. A pretty obvious thing to do, but I had not thought of it, and it would have saved my from taking the entire machine apart several times. Good Luck
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The sub woofer can be connected by bridging one side of the right channel to the other side of the left channel. Usually this will be marked on the speaker connection terminal and use will not have any trouble to locate. If not use the + ve of the right and the - ve of the left to connect to the sub woofer. turn it on and check . If you find the phase different- with less bass- reverse the connection and try. this will work fine. Good day
Swap the channel cables from the turntable left to right to see if it follows a channel from the turntable or the same speaker is dead. If it swaps with the cable, then look for a break in the wire to the pickup on the tone arm. If the dead speaker remains the same, you have a problem in that side of the amp or the phono preamp.
Regarding the poor sound quality (and possibly the skipping):
check the needle condition, see if exchanging it with a needle (or the entire pickup head) from a working turntable does any good.
Check the pickup connection pins (contacts on the pickup head and on the end of the wires coming through the arm from the unit), see if there is any dirt or oxydation and clean the contacts if necessary, also check for any damage to the wires.
As for the skipping - a heavily worn needle may affect the sound quality and cause skipping as well - if cahnging the needle (or the pickup head) doesn't make a change, try to realign the weight on the tone arm so that the pickup head will become a bit heavier, this could help somewhat (before you actually try to realign the weight, try to put a small coin or a small weight of some kind on the pickup head while it is playing a record, if the skipping goes away, you need to realign the tone arm weight).
This could also be a problem with the tone arm lifting mechanism (may be obstructed by something or damaged so it won't let the tone arm sit properly onto the record and "grab" the groove).
I just mentioned a few things you might want to check, but don't take anything for granted, the problem may as well be elsewhere in the unit.
Try swapping the turntable RCA cables around at the back of your aplifier or hi-fi to check if it is the same channel giving you problems. if the same side remains dead, it might be you RCA plug itself. Turn your "ballance" on your Amp, so that the channel that is still working, is muted. Jiggle the faulty plug around, and see if you get any noise from the dead channel. If that is the case, find an old set of RCA cables and cut one plug of to leave about 6 inches or so of wire. Do the same with the dead plug on the turntable, and strip both sets of wire back, and solder. Tape it up and give it a go
The first thing I would check has already been done, the only other thing would be fuses. I am preety sure there is a protection fuse at ever channels output to protect against a dead short. I am sure you have already fixed this problem but I thought I would give it a try. Let me know what you found.
Hey, I'm having the same problem. I found this with a little help from a small site I found called Google:
Here's what he suggests. I have no clue what it means but I'm sure that it cane be decoded with some manuals:
Technics SL1210 , 1979 ? Intermittent loss of one channel. The headshell was slightly loose on the tonearm and moving inwards would cause loss of one channel. To remove this arm undo the slotted lock ring at the very top of the arm pivot and undo the central pin. The arm with jiggling can then be removed assuming enough slack in the signal wires. Undoing the 2 watchmakers screws near the headshell allows removal of the 4 pin connector. Presumably the wires inside the tone arm at this connector could touch the inside of the tonearm and lead to break in sprung connection. Placed a bit of brass shim in the slack area and pushed back in to wedge tight. Also removed the soft washer on the plug shaft of the headshell.
ive had this problem djing in front of 700 people...Not good!! i can tell you exactly what it is, the tone arm bearings are being pinched too tight or there is a tiny piece of debris in the bearing race of your tone arm or blatentley your vinyl is scratched lol.... assuming you ve set your stylus correctly and the turntable is level on both axis???? slightly unscrew the tiny screw on top of the tone arm just enough to release the pressure on the bearings inside, but not so much that it wobbles about??? happy mixing
1) This turntable either has bad RCA cables or a faulty tonearm - in either case, none are easy fixes. FYI, If you use Ortofon Concorde series, they are notorious for causing faulty connections with your tonearm, and eventually deteriorate your tonearm over time. So you might want to think about changing them if you get a new tonearm put on. If you use the Technics headshell, you are fine.
2) This turntable definitely needs to have the tonearm replaced. Once the arm comes loose from it's bearings, it's next to impossible to get it back to factory specs, and you will have skipping issues.
Both will require professional servicing. Check out www.1200s.com if your in the NYC area.