Question about Technics SL-1210M5G Turntable

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My 1210M5G is playing only through the left channel. i have run all the possible left-right checks, exchanging the leads, changing the phono pre amp, switching the cartridge wires, tapping the loose wires etc. the sound from the right channel is perfect, from the left it is extremely faint, almost negligible and lacking body....

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  • Expert
  • 417 Answers

STUPID I NO, BUT HAVE YOU CHECKED THE BALANCE ON MIXER.

Posted on Nov 03, 2013

  • hemant chaturvedi
    hemant chaturvedi Nov 04, 2013

    still waiting for my replacement cartridge to show up....will know immediately when I replace it!

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: one sided sound...but this time I have replaced rca/phono lead with a new one,what else could it be?

Have you tried using a different needle?

Posted on Oct 22, 2007

djproaudio
  • 515 Answers

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

Posted on Jan 19, 2008

  • 1 Answer

SOURCE: Dead left channel

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

Posted on Jun 18, 2009

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1 Answer

I am getting a weak signal on the right channel of my Hitachi HT-40S turntable with original Ortofon LM 10 cartridge.


If you have disconnected the cartridge and touched the leads in that state and you had no sound out of the right channel, then there is nothing wrong with the cartridge at all. You either have a bad lead from the deck to the amp, or a bad connector to the amp. If replacing or fixing the lead does not correct the problem, then you have to look at the pre-amp in your amp as the cause. The amp will have a dedicated magnetic cartridge pre-amp. It's failure on the right channel will not effect any other function, such as tape or radio. You can easily find the cause, by tracing the phono connector wires back (inside the unit) to the first port of call on the PC board. You will either find a single IC doing most of the work of the pre-amp or two IC's, one for each channel. If you are lucky and a single channel IC does the work, replace the right hand one. Otherwise replace the dual channel one.

If you think it's the cartridge, then remember that putting the left channel connector on the right input of the cartridge should see no sound. But if you hear sound by switching the cartridge connections the cartridge is good.
I have noticed that you have tried another amp with the deck and it made no difference. This implies then a faulty lead between the deck and amps.

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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.

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Disconnect the wires to the cartridge. With the amp on. Touch each wire (one at a time) with your finger. Two of the wires should buzz (1 left, 1 right) if the left doesn't buzz either the connections are faulty or the pre-amp in your amp is.
If you get a buzz on the left, replace the cartridge.

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Generally either a faulty connection to a lead or cartridge. Or a faulty Cartridge. If you switch the left and right channels of the phono leads the missing sound should move to the left and the right come to life. If it does not then there's a fault in the magnetic cartridge pre-amp in your amp.

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With it connected to the amp remove the wires to the cartridge. With the amp on touch each wire with your finger one at a time. On one wire you should hear a loud buzz on the left. On other wire the right. The two other might produce a minor buzz or nothing at all, so ignore them. If you hear the buzz on both channels there's something wrong with the cartridge or the connection to it.

If you don't hear the buzz. Then (1) there's a bad connection between the deck and amp (phono plug or wire). (2) failed pre-amp inside the record deck itself. (3) failed pre-amp in the main amp. (this would not affect any other settings in the amp so tape decks will play normal etc).

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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.
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