Fixed cueing arm lift for Technics SL 1300-1400-1500 mk2

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lexxz
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Re: Fixed cueing arm lift for Technics SL 1300-1400-1500 mk2

Post by lexxz » 23 Nov 2019 17:36

shiny surface in place

sylvain999
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Re: Fixed cueing arm lift for Technics SL 1300-1400-1500 mk2

Post by sylvain999 » 04 Dec 2019 20:24

jjtheski wrote:
06 Sep 2019 19:02
I have read through this whole topic, and I have successfully used the shapeways 3D printed piece to repair the lift function on my SL-1300 mk2. Thank you all so, so much for all the info.

Unfortunately, I've run into a bit of an issue. My auto-return is not working, and Im hoping someone can give me some pointers to look for before I take the whole thing apart again... please note the following

1 - the auto-start DOES work. (if I simply press the start button, it lifts the arm up, and moves it to the start of the record and plays)
2 - I've verified that the auto-return button is pressed down (behind the tonearm)
3 - I've adjusted the little return setting dial that is down under the pivot point
4 - when i reassembled, I made sure that the two parts of the light sensor were parallel, and the arm does travel through it, perhaps there is a special distance that the light portion needs to be away from the sensor?

I'm wondering if I misaligned some shaft, or there's a sneaky spring or screw. I thought I took great care to reassemble it all, so I strongly doubt anything obvious will stick out to me when I take it apart again.

Anyway thanks for all the previous info, and the part. And thank you for any ideas you can give me on my issue.
the light should be no more than 1 mm. away, 2mm at the max so check if the plate is straight.

My guess is the auto return switch is oxydated so when you push it on it looks on but the contact is faulty.
Try cleaning it with a drop of contact cleaner, then press it on/off till your finger bleeds!
while the turntable is opened, also clean the mute switch, same cleaning method but reach the switch by hand and wiggle it on off many times. Sometimes the old goo from the arm lifter gets on this switch, making it hard to move.

scho2684
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Re: Fixed cueing arm lift for Technics SL 1300-1400-1500 mk2

Post by scho2684 » 05 Dec 2019 06:39

jamkrouse wrote:
07 Aug 2019 12:52
I have (2) issues with my 1300MK2. First is the piece I can purchase from shapeway but the second is the plastic piece that follows the cam opening in the cueing mechanism has the following stud sheered off. Is there a fix or a 3D printed replacement for this as well? Thanks!
That was the part that was broke with me as well...
Took me several months to find a (reasonable priced) replacement, I had to buy a complete donor arm for that by the way.

None the less: this part could be made by someone who is handy with metal and the correct tools... (that was my plan B)

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Re: Fixed cueing arm lift for Technics SL 1300-1400-1500 mk2

Post by scho2684 » 05 Dec 2019 06:48

sylvain999 wrote:
04 Dec 2019 20:24
jjtheski wrote:
06 Sep 2019 19:02
I've run into a bit of an issue. My auto-return is not working, and Im hoping someone can give me some pointers to look for before I take the whole thing apart again...
the light should be no more than 1 mm. away, 2mm at the max so check if the plate is straight.

My guess is the auto return switch is oxydated so when you push it on it looks on but the contact is faulty.
Have you checked whether the led is on?
It could be a faulty circuit as well, especially on the small PCB that sits directly underneath the platter.
If you have a scope you can actually measure it, the service manual gives good guideline there and I was able to determine that my was faulty... Replaced it by another board and all started to work again (1400MK2 so auto return only)

BTW:
That little PCB can also cause issues in the drive control I have noticed...
When suffering from strange platter behaviour almost everyone starts to look at that famous chip on the main board, but it can also be something very different it seems ;-)

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Re: Fixed cueing arm lift for Technics SL 1300-1400-1500 mk2

Post by lexxz » 17 Dec 2019 22:19

Thanks so much for the great tips. I did it. Now the arm comes back. But a new problem arose. After the tonearm returns, the motor does not turn off. This is a new problem. Previously, the engine turned off and the tonearm did not return without lifting it manually. Waiting for advice

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Re: Fixed cueing arm lift for Technics SL 1300-1400-1500 mk2

Post by scho2684 » 18 Dec 2019 06:28

That could be a adjustment thing...
It is the two yellow wires next to the two white ones on that small PCB underneath the platter.
Those are from switch S501
S501 is located underneath the baseplate where all the mechanics are for the return mechanism.
It is triggered by the nylon part in the red circle, which moves another thing underneath that plate which (de)presses the switch when the arm returns. During play that switch is pressed...

So when moving arm inwards and back you should actually hear that switch switching.
If it does switch, then there is a shortcut somewhere, which could come from that small PCB to where the switch wires go.
S501 trigger.jpg
(99.25 KiB) Downloaded 28 times

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Re: Fixed cueing arm lift for Technics SL 1300-1400-1500 mk2

Post by lexxz » 18 Dec 2019 08:07

Many thanks . I set the motor to turn off. Adjusting the screw on top of the tonearm. It turned out so simple. The last problem: the strobe lights are off. 20 days did not turn on the device. I turned it on, the strobe lights came on, but after 5 minutes they went out. What is this problem.

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Re: Fixed cueing arm lift for Technics SL 1300-1400-1500 mk2

Post by scho2684 » 18 Dec 2019 15:11

That is a electrical problem, I don't know, from here you have to follow the service manual...

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Re: Fixed cueing arm lift for Technics SL 1300-1400-1500 mk2

Post by ZoKtorR » 18 Dec 2019 15:48

You might want to start a new topic too.

lexxz
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Re: Fixed cueing arm lift for Technics SL 1300-1400-1500 mk2

Post by lexxz » 18 Dec 2019 16:08

Thank you, but I have a bad English. But it is very good that I replaced the Shapevays part and the wires of the KAB (Kabusa.com) tonearm. Thank you very much for your help and participation.

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