Sl-7 Disassembly Problem

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monoethylene
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Re: Sl-7 Disassembly Problem

Post by monoethylene » 10 Dec 2012 15:02

Great thread :)

I am in progress of restoring a SL-10, Ive got for less money. This includes deep cleaning of the whole unit as well as relubricating the gears and tonearm quide. Further I am in progress of recapping all boards. Last but not least I will change the belt.

to sum up, this thread is very helpful to find possible causes of errors.

Here are some pics :)

http://www.abload.de/thumb/img_7679hko5x.jpghttp://www.abload.de/thumb/img_7678d6pnj.jpghttp://www.abload.de/thumb/img_76796qoj3.jpghttp://www.abload.de/thumb/img_7689ijrfh.jpg

http://www.abload.de/thumb/img_7690wjrlz.jpghttp://www.abload.de/thumb/img_7691aqrth.jpghttp://www.abload.de/thumb/img_7692vyq1a.jpghttp://www.abload.de/thumb/img_7693xerh7.jpg

http://www.abload.de/thumb/img_769467ree.jpghttp://www.abload.de/thumb/img_769571r8r.jpghttp://www.abload.de/thumb/img_7682nboqc.jpghttp://www.abload.de/thumb/img_7683j5qyg.jpg

http://www.abload.de/thumb/img_7684pbpsp.jpghttp://www.abload.de/thumb/img_768541oxc.jpghttp://www.abload.de/thumb/img_7686z2r7m.jpghttp://www.abload.de/thumb/img_76874mpox.jpg

http://www.abload.de/thumb/img_7688yxp0j.jpghttp://www.abload.de/thumb/img_7699gfq82.jpghttp://www.abload.de/thumb/img_7700zbo33.jpghttp://www.abload.de/thumb/img_7709hto5z.jpg

http://www.abload.de/thumb/img_7710daqne.jpghttp://www.abload.de/thumb/img_77113vqvq.jpghttp://www.abload.de/thumb/img_7713cgrbs.jpghttp://www.abload.de/thumb/img_7714foq1v.jpg

http://www.abload.de/thumb/img_7715hapxt.jpghttp://www.abload.de/thumb/img_7716dbqsk.jpghttp://www.abload.de/thumb/img_7701sjqer.jpghttp://www.abload.de/thumb/img_7702nqr9m.jpg

http://www.abload.de/thumb/img_7703yeoze.jpghttp://www.abload.de/thumb/img_7704thpfl.jpghttp://www.abload.de/thumb/img_7705znoyh.jpghttp://www.abload.de/thumb/img_7706l1opr.jpg

http://www.abload.de/thumb/img_7707z2qez.jpghttp://www.abload.de/thumb/img_77082wr7v.jpg

More pics will follow

Have fun,

Philipp

fscl
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Re: Sl-7 Disassembly Problem

Post by fscl » 11 Dec 2012 03:39

Welcome to VE..... :)

Pictures look interesting however they are kind of small..... :?

Would it be possible to make them a bit bigger...... :-k :-k [-o<

Appreciate it as I'm getting along in my years and I can't see as well as i did 30+ years ago..... :?

Fred

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Re: Sl-7 Disassembly Problem

Post by jfgiovanni » 11 Dec 2012 16:03

On dis-assembly of my SL-DL1 I found the tone arm guide rod to be mostly dry. I was able to wipe off a black-ish film that suggested that the guide rod had some type of lube applied at manufacture in a very small amount. Does anyone know if, or recommend to, put any kind of lube on the tone arm guide rod? The guide rod looks like its a lube impregnated steel, and if so it might not require added lube???

Quite surprisingly, when I opened up my lid, I found the worm and driven gears to be free of dried grease. I bought this new 1981 so I know it's never been apart...I guess I'll pat myself on the back for carefully storing this unit for 20 some years so that the grease never dried out. The tone arm drive rope appears to be intact but has a greyish grease or lube of some sort all over it, glad I don't have to mess with that mess! But the tone arm drive belt has stretched to about 3 inches in length, where the belt is suppposed to be 2.6 inches in length, hence my no-tone-arm-movement issue. I'm just now waiting for the new belt to arrive to get this table turning vinyl again...

monoethylene
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Re: Sl-7 Disassembly Problem

Post by monoethylene » 13 Dec 2012 13:36

fscl wrote:Welcome to VE..... :)

Pictures look interesting however they are kind of small..... :?

Would it be possible to make them a bit bigger...... :-k :-k [-o<

Appreciate it as I'm getting along in my years and I can't see as well as i did 30+ years ago..... :?

Fred
Hej Fred,

Sorry for the little pics. Thought these would be larger. Nevertheless, here is the link to the gallery:

http://www.abload.de/gallery.php?key=r0vygViU

I hope this works. Concerning the pics I have a question relating an electrolytic. There is one at the drive board named C219. Following photo will show this cap:

http://www.abload.de/img/img_7701sjqer.jpg

It is the second from bottom next to the IC. It is not mentioned in the service manual and not drawn on the schematic. First Ive put a 33uF inside because this value was left when compared to the parts list. Then I removed it again because I didnt find it on the schematic.

Any ideas of the value??

Right now the platter is moving too fast in 33 RPM position and the tonearm doesnt move at all. When I am turning the gear of the tonearm manually and then switch on the power the tonearm is getting back to the start position.

A little bit crazy right now but I will try it again with the cap :) :)

fscl
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Re: Sl-7 Disassembly Problem

Post by fscl » 13 Dec 2012 15:01

monoethylene wrote:
Hej Fred,

Sorry for the little pics. Thought these would be larger. Nevertheless, here is the link to the gallery:

http://www.abload.de/gallery.php?key=r0vygViU

I hope this works. Concerning the pics I have a question relating an electrolytic. There is one at the drive board named C219. Following photo will show this cap:

.....snipped.....

It is the second from bottom next to the IC. It is not mentioned in the service manual and not drawn on the schematic. First Ive put a 33uF inside because this value was left when compared to the parts list. Then I removed it again because I didnt find it on the schematic.

Any ideas of the value??

Right now the platter is moving too fast in 33 RPM position and the tonearm doesnt move at all. When I am turning the gear of the tonearm manually and then switch on the power the tonearm is getting back to the start position.

A little bit crazy right now but I will try it again with the cap :) :)
#-o #-o , hi MEG <---- presuming the G.... :)

Anyway, for years, been trusting that the Japanese and their service manual were fastidious, however, really having a hard time trying to find C219. Is this the flat disc cap bent slightly towards IC 201 (or C217?)..... :-k :-k Or is it the electrolytic which resides right next to the silk screened label (C partially blocked).....:-k :-k Either way, cannot locate C219 on any of the diagrams or parts list.... :? They both look intact....:-k :-k so I'm wondering why you've zeroed in on this cap..... Then there is also the possibility that the silk screening is off....:-k :-k Reminds me of "as built" drawings.....sometimes what has been installed in reality is far from what's spec'd on the drawings..... [-o< #-o ](*,)

One thing for sure, it guarantees job security.....:-k :-k

Haven't touched my SL-10 in a while, when I opened her up, found a leaky electrolytic, so will have to be replaced along with providing ground to the left / blue white tonearm leads...... :? but don't hold your breath as there are easier tts to fix / refurb or newer challenges and I've got a bunch of working linears.

Right now preparing to work on a more parts (thanks to USPS) parts DL1 with a broken tonearm drive rope..... :( Never done one before since the other linears arrived OK. Recommendations on replacement on this thread suggest the use of tuner drive cord, however, if dimensions are correct, seems too thick, so will experiment with 49 strand beading cord @ 0.024" and a bunch of beading cord crimps.....love the arts and crafts stores...... :D Brought the old rope / cord / cable with me to compare diameters.

Good luck with the cap ID, can you locate a / the C218? physically on the board?, I'm guessing perhaps it was mislabeled.....:-k :-k

Fred and thanks to the link to the pictures..... :D

monoethylene
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Re: Sl-7 Disassembly Problem

Post by monoethylene » 13 Dec 2012 16:29

Thanks for your reply. Actually it is the circled one shown in the pic:

http://www.abload.de/img/img_7701sjqer2eej4.jpg

Now I ve putted a 33uF inside and the platter rotated with normal speed but only 4 minutes or so and the nor the tonearm neither the platter turned :? :?

Right now I am deoxiting the switches and cleaned the LEDs on the PCB with alcohol.

Here are some more pics after recapping:

http://www.abload.de/img/img_7770sqq3b.jpg

http://www.abload.de/img/img_7772ryq5t.jpg

Have fun,

Philipp

What do you mean with silk screening??

monoethylene
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Re: Sl-7 Disassembly Problem

Post by monoethylene » 13 Dec 2012 21:28

:(

I dont know what to do right now. When pressing the start switch the platter turns with high speed and I cannot move the tonearm, no cueing just nothing. I hope that the IC is okee...

Any ideas?

Philipp

monoethylene
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Re: Sl-7 Disassembly Problem

Post by monoethylene » 14 Dec 2012 20:01

A little update. I compared the manuals of the SL-15 and the SL-10 and I found the cap C219 in the schematic of the SL-15. Originally I had the same cap inside and I putted it back. Meanwhile I checked the transistors next to the ICs and all seems to be ok.

Philipp

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Re: Sl-7 Disassembly Problem

Post by Tangmu » 19 Jan 2013 19:14

Hello,

I picked up a Technics SL-10 at one of those stores with a silly price tag on it. Tested it in store and it seemed to work.

At home I realized that the arm would get stuck at about 2/3 through (read here that many people had the same problem). Followed this thread and took it apart, cleaned it up, gave it a good lubrication, particularly on the beam below the rod. (I believe the beam is the culprit for making the arm stuck at that position. It’s where the beam begins to slide into a protection guard of sort, where it needs a little extra pull). Before the new belt arrives, I sprayed the old one with belt conditioner, put it back on and everything works great.

Best of all, the TT came with the original 310MC, and the sound is incredible.

Just want to thank everyone who contributed to this thread, the help and all those wonderful pictures. Fortunately, I don’t seem to have any electronic issues. I’m a happy camper!

TM

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Re: Sl-7 Disassembly Problem

Post by jaycam83 » 21 Jan 2013 18:55

Where have you found replacement belts for the SL-10? I'm looking for one as my tonearm gets stuck at times. I'll be lubricating the rod tonight with some dry-lube moly.

Thanks!

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Re: Sl-7 Disassembly Problem

Post by Tangmu » 22 Jan 2013 01:31

jaycam83 wrote:Where have you found replacement belts for the SL-10? I'm looking for one as my tonearm gets stuck at times. I'll be lubricating the rod tonight with some dry-lube moly.

Thanks!
Ebay: http://www.ebay.com/sch/i.html?_trksid= ... &_from=R40

Don't forget to lubricate the beam too.

jaycam83
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Re: Sl-7 Disassembly Problem

Post by jaycam83 » 22 Jan 2013 16:02

Tangmu wrote:
Ebay: http://www.ebay.com/sch/i.html?_trksid= ... &_from=R40

Don't forget to lubricate the beam too.
Thank you. I actually found that ebay listing but wasn't 100% sure that was the correct size belt. Thanks for the confirmation!

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Re: Sl-7 Disassembly Problem

Post by jaycam83 » 05 Feb 2013 21:46

I'm wondering if any one has the light-block sheets that came with the SL-10. I want to attempt to make my own and was hoping someone has one so I could work on a template or something. Thanks!

fscl
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Re: Sl-7 Disassembly Problem

Post by fscl » 06 Feb 2013 02:02

jaycam83 wrote:I'm wondering if any one has the light-block sheets that came with the SL-10. I want to attempt to make my own and was hoping someone has one so I could work on a template or something. Thanks!
Does this help:

13845

Fred

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Re: Sl-7 Disassembly Problem

Post by jaycam83 » 06 Feb 2013 02:18

That's prefect, thanks Fred!

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