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technics SL 2000 pitch not stable problem

Posted: 14 Jun 2016 13:38
by mannamit
Hi all
Great site VE!

I bought recently a vintage Sl-2000 turntable and i have some pitch problem.
The strobe dots are not stable and wobble back and forth a bit but noticeable on certain tunes.

I tried cleaning the pitch knobs, pots and "adjust holes" underneath with dry contact spray and turn them around a bit.
I think that one of the pots was changed once.

Any ideas from the experts here?
Thanks
Amit

Re: technics SL 2000 pitch not stable problem

Posted: 15 Jun 2016 17:37
by beat_truck
Try cleaning the on/off/speed switch. My SL 2000 had erratic speed problems until I did that.

Re: technics SL 2000 pitch not stable problem

Posted: 16 Jun 2016 12:39
by mannamit
thanks for the reply

Do you think i should clean from the bottom? i sprayed a bit of contact cleaner from the top.
Also, what do you think about oiling the spindle?

appreciate your help
Amit

Re: technics SL 2000 pitch not stable problem

Posted: 17 Jun 2016 00:57
by sylvain999
Always clean from the hole small in the back cover of the speed pot/ swithes. One small push of DE-oxit with fader lube with the straw in the hole, turn the pot/swich many times, and it's done. For spindle,you can use sewing machine oil. Me i like to use Tufoil,it's not cheap, (and i don't know if you can find it in your country) it comes in a seringe container, has the right propreties and it's easy to put a drop or two precisely where you want.

Re: technics SL 2000 pitch not stable problem

Posted: 17 Jun 2016 16:10
by mannamit
Thanks! i'll try it again...
Hope it will work
Does somebody know where i can get instruction to oil the spindle? it really looks like that's the problem

Thanks again!
Amit

Re: technics SL 2000 pitch not stable problem

Posted: 17 Jun 2016 16:32
by Japi Roelofs
The SL-2000 is a bit different than the usual Technics turntable. To oil the spindle you would have to dismantle the entire motor, not a good idea as it is a sealed motor, not an open bearing. Also it is greased, not oiled. Best to leave it alone.

Cleaning the pots is usually the way to cure speed problems. Here's a video that shows how to do it, it's a different model but the pots are the same.

Re: technics SL 2000 pitch not stable problem

Posted: 18 Jun 2016 23:36
by mannamit
Thanks!
This video is great! Did all that is related to my model.
But:\
Still have the same problem. Strobe dots are not stable enough. Maybe that's the best for this model?
it really looks like the motor is not greased or some kind of friction problem.
Maybe i should take it to a repair store?
tnx
Amit

Re: technics SL 2000 pitch not stable problem

Posted: 20 Jun 2016 21:21
by Japi Roelofs
When you say friction, do you mean it is making a grinding noise? Or any noise at all? The turntable should turn smoothly, when spun by hand, and not make any noise.

Sometimes another clean is needed. If that doesn't help, it might have something to do with the electronics, in which case it's a good idea to take it to a repair shop.
My experience with the SL-2000 is limited: mine had a busted tonearm and I quickly gave up on it. Someone else might chime in though.

Re: technics SL 2000 pitch not stable problem

Posted: 29 Jun 2016 20:48
by tom6to1
I have 2 SL-2000s with speed problems. Cleaning the pots does work but there is also some discussion elsewhere that the IC used to control the speed on this model eventually gives up and there is no modern replacement. If cleaning the pots no longer fixes the problem you may just be out of luck.

Re: technics SL 2000 pitch not stable problem

Posted: 03 Jul 2016 02:45
by audiofilo297
Hi everybody! I have a similar problem (pitch not stable), but with my SL-D2. Years ago somebody in the forum wrote: "At random times the pitch changes up or down, and when I try to adjust it the pitch control acts hypersensitive. An almost imperceptible movement swings the pitch wildly, and it's really tough to get it to stabilize.". This is exactly what I am suffering now. May any of you forward me a solution? Thanks!

Re: technics SL 2000 pitch not stable problem

Posted: 28 Dec 2016 18:34
by Carolus
Hi Folks.
I have same (very) unstable pitch problems.
I share my lab experiences ... with good news.

With the first step:
1°) cleaning the pitch knobs, pots and "adjust holes" underneath with dry contact spray and turn them around.
No result in stability.

2°) I replace electrolytic caps:C1, C8, C9, C10, C11.
With higher work voltage 63Vdc & same values on the (old) caps (!? some discordances with the schema !?).
It's a very easy operation (cut the wires 2mm above the pcb .... re-solder the new ones)
The 2 tantal-caps C12, C14 stay in place ...
... well, I have now a 100% "stable-goal" ..... I am very happy .... it's again music ...... I like it.

I love my SL-2000 (with a DIY terminator arm) ....

Allez, salukes .......
& to all: happy new year 2017 .... stable & safe ....

Karel

Re: technics SL 2000 pitch not stable problem

Posted: 27 Apr 2019 14:45
by Diego7675
hi guys
I have just re put into operations my SL2000, but after a few days the speed rose up to stratospheric values! I closely followed all your previous advices (opened the back and spray the pitch controls, check the wirings, remove the "adjusted" tape and rotate the quartz pitch adjustment controls...), but nothing: it seems that the engine is totally out of contrlo! Any other suggestion before i take it to a repair shop? Thank you!

Re: technics SL 2000 pitch not stable problem

Posted: 28 Apr 2019 05:40
by Carolus
One quit (?):
Did you replace (all) the electrolytic caps C1/C8/C9/C10/C11 (& with higher work voltage) .... !?

Re: technics SL 2000 pitch not stable problem

Posted: 16 May 2019 23:06
by barriVinyl
Hello everyone,
I also have problems to stabilize the speed of my turntable.
I'm thinking about replacing the electrolytic caps. But what is the value of cap C11?
Is it also 4.7V 25V? Thanks for the answer in advance!

Re: technics SL 2000 pitch not stable problem

Posted: 26 May 2019 19:45
by P4t1n3tt3
barriVinyl wrote:
16 May 2019 23:06
Hello everyone,
I also have problems to stabilize the speed of my turntable.
I'm thinking about replacing the electrolytic caps. But what is the value of cap C11?
Is it also 4.7V 25V? Thanks for the answer in advance!
Yes, C11 25V4.7. This is stated in the service manual, leaf 7. https://www.vinylengine.com/library/tec ... 2000.shtml :wink: