technics SL 2000 pitch not stable problem

turning japanese
Post Reply
mannamit
Posts: 4
Joined: 14 Jun 2016 00:13

technics SL 2000 pitch not stable problem

Post by mannamit » 14 Jun 2016 13:38

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

beat_truck
senior member
senior member
Posts: 278
Joined: 30 Oct 2011 22:10
Location: SW PA

Re: technics SL 2000 pitch not stable problem

Post by beat_truck » 15 Jun 2016 17:37

Try cleaning the on/off/speed switch. My SL 2000 had erratic speed problems until I did that.

mannamit
Posts: 4
Joined: 14 Jun 2016 00:13

Re: technics SL 2000 pitch not stable problem

Post by mannamit » 16 Jun 2016 12:39

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

sylvain999
senior member
senior member
Posts: 365
Joined: 10 Mar 2012 22:51
Location: Blainville Quebec

Re: technics SL 2000 pitch not stable problem

Post by sylvain999 » 17 Jun 2016 00:57

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.

mannamit
Posts: 4
Joined: 14 Jun 2016 00:13

Re: technics SL 2000 pitch not stable problem

Post by mannamit » 17 Jun 2016 16:10

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

Japi Roelofs
long player
long player
Netherlands
Posts: 4505
Joined: 05 Apr 2008 16:53
Location: Netherlands

Re: technics SL 2000 pitch not stable problem

Post by Japi Roelofs » 17 Jun 2016 16:32

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.

mannamit
Posts: 4
Joined: 14 Jun 2016 00:13

Re: technics SL 2000 pitch not stable problem

Post by mannamit » 18 Jun 2016 23:36

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

Japi Roelofs
long player
long player
Netherlands
Posts: 4505
Joined: 05 Apr 2008 16:53
Location: Netherlands

Re: technics SL 2000 pitch not stable problem

Post by Japi Roelofs » 20 Jun 2016 21:21

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.

tom6to1
member
member
Canada
Posts: 201
Joined: 22 Oct 2011 18:09
Location: Toronto, Canada

Re: technics SL 2000 pitch not stable problem

Post by tom6to1 » 29 Jun 2016 20:48

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.

audiofilo297
Posts: 1
Joined: 03 Jul 2016 00:57

Re: technics SL 2000 pitch not stable problem

Post by audiofilo297 » 03 Jul 2016 02:45

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!

Carolus
member
member
Posts: 34
Joined: 15 Jan 2006 20:38
Location: Pajottenland

Re: technics SL 2000 pitch not stable problem

Post by Carolus » 28 Dec 2016 18:34

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

Diego7675
Italy
Posts: 1
Joined: 27 Apr 2019 13:47

Re: technics SL 2000 pitch not stable problem

Post by Diego7675 » 27 Apr 2019 14:45

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!

Carolus
member
member
Posts: 34
Joined: 15 Jan 2006 20:38
Location: Pajottenland

Re: technics SL 2000 pitch not stable problem

Post by Carolus » 28 Apr 2019 05:40

One quit (?):
Did you replace (all) the electrolytic caps C1/C8/C9/C10/C11 (& with higher work voltage) .... !?

barriVinyl
Belgium
Posts: 1
Joined: 27 Jan 2019 19:45

Re: technics SL 2000 pitch not stable problem

Post by barriVinyl » 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!

P4t1n3tt3
member
member
France
Posts: 35
Joined: 10 Nov 2017 04:03

Re: technics SL 2000 pitch not stable problem

Post by P4t1n3tt3 » 26 May 2019 19:45

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:

Post Reply