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This is the instructions I have for the repair-you can find a helpful picture online too - but maybe a different issue - I got the following text online - hope it helps - Mickey

The SP-15 has probably garnered a reputation of being Technics "bad boy" quite undeservedly. My guess is the precentage of SP-15s that have developed problems is quite small. When you consider that a great many saw duty working in broadcast stations 24/7/365 for years on end it is quite amazing that a large number are still going and have entered the second phase of their life in either another commercial setting or serious/well used home enviroment. Hopefully this post will dispell the notion that the SP-15 is to be avoided. If your handy and somewhat skilled doing soldering it's as simple as removing the SP-15 mat and platter, then with a phillips screwdriver remove the three screws marked with an arrow on the spindle/bearing motor unit. Unplug the spindle/beearing/motor unit from the wire harness flip it over and there's the board with the three closely spaced solder points that are more than obvious as Dave/Cactuscowboy told me. With equipment at hand shouldn't take more than 15 minutes and the SP-15 will be playing at 33/45/78 dead on. Kent we will take another look at the SL-1200Mk2 start/stop button/pad as an alternative replacement part. So far it hasn't been a big hardship without the start/stop feature along with the brake but I would like to get it 100% functional with these features working again. I'v noticed a few SP-15s and also SP-25s that were missing the start/stop button and maybe Kent has some insight if this might of been an intentional removal when remote start/stop was installed.

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M.C.Productions Vintage Recordings
    710 Westminster Ave. West
             Penticton BC
                V2A 1K8
http://mcproductions.shawbiz.ca
----- Original Message ----- 
From: "Steven Smolian" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, October 08, 2013 4:09 PM
Subject: Re: [ARSCLIST] technics sl-1015 repair


> I've just had a couple repaired by my local wiz.  
> 
> Other, reparable things go wrong with it as well and the mimic the problems
> created by the bad chip.  
> 
> His number is 301-694-5134.  He's in and out, but usually answers his calls.
> 
> 
> Steve Smolian   
> 
> -----Original Message-----
> From: Association for Recorded Sound Discussion List
> [mailto:[log in to unmask]] On Behalf Of Cary Ginell
> Sent: Tuesday, October 08, 2013 6:28 PM
> To: [log in to unmask]
> Subject: Re: [ARSCLIST] technics sl-1015 repair
> 
> I was told by several specialists that the chip cannot be repaired nor is
> there a way around the problem. The chip has to be replaced. I am not
> familiar with the SL model so I cannot tell you if it is the same chip that
> is in the SP-1015.
> 
> Cary Ginell
> 
> On Oct 8, 2013, at 3:17 PM, David Seubert <[log in to unmask]> wrote:
> 
>> Yes. It's very wide wow. But the +/- buttons stopped working first.
>> 
>> David
>> 
>> 
>> -----Original Message-----
>> From: Association for Recorded Sound Discussion List 
>> [mailto:[log in to unmask]] On Behalf Of Mickey Clark
>> Sent: Tuesday, October 08, 2013 3:05 PM
>> To: [log in to unmask]
>> Subject: Re: [ARSCLIST] technics sl-1015 repair
>> 
>> Does the speed go out of control? if so-there is an easy fix. There 
>> are three solder points under the motor assembly - I re-soldered them 
>> and corrected the problem-mickey Follow me on Twitter 
>> https://twitter.com/MickeyRClark M.C.Productions Vintage Recordings
>>    710 Westminster Ave. West
>>             Penticton BC
>>                V2A 1K8
>> http://mcproductions.shawbiz.ca
>> ----- Original Message -----
>> From: "Cary Ginell" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Tuesday, October 08, 2013 1:50 PM
>> Subject: Re: [ARSCLIST] technics sl-1015 repair
>> 
>> 
>>> Is the SL the one with the longer tonearm, designed to play 16" discs? 
>>> If so, I'd say yes.
>>> 
>>> Cary
>>> 
>>>> On Oct 8, 2013, at 1:47 PM, "Jim Sam" <[log in to unmask]> wrote:
>>>> 
>>>> Cary,
>>>> 
>>>> Do you know if the SP-15 is designed the same way and/or uses the 
>>>> same chip?
>>>> 
>>>> Thanks,
>>>> Jim
>>>> 
>>>> 
>>>>> On Tue, Oct 8, 2013 at 10:34 AM, Cary Ginell <[log in to unmask]>
>>>>> wrote:
>>>>> 
>>>>> This caused the downfall of my SP-1015 as well and apparently is a 
>>>>> common problem with these machines. The chip that controls the 
>>>>> speed is not made anymore, so the only way you can get one is to 
>>>>> cannabilize one from another turntable.
>>>>> 
>>>>> Cary Ginell
>>>>> 
>>>>> 
>>>>> On Oct 8, 2013, at 10:22 AM, David Seubert 
>>>>> <[log in to unmask]>
>>>>> wrote:
>>>>> 
>>>>>> I have a Technics SL-1015 in need of repair. The +/- speed 
>>>>>> adjustment stopped working a few weeks ago and this week the speed 
>>>>>> has become unstable. Does anybody know who can repair this?
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> I can ship it, but would prefer someplace in LA.
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> David Seubert
>>>>>> 
>>>>>> UCSB
>>>>> 
>>> 
>> 
>