Slot-Loading Optical Drive Mechanism - Repair Service and Maintenance: any Information ?

There are a lot of modern audio components with such kind of cd drive unit (e. g. Tivoli, SONORO, BOSE etc) - mainly are such cd slot loaders in use on lap tops resp. notebooks.
Nevertheless image series and repair resp. replacement advice are very rar on the web, unfortunately.

Here any few URL's I found:
http://muzso.hu/2008/08/17/how-to-c...ading-optical-drive-a-macbook-pros-superdrive

I want to know mainly descriptions concerning complete dismantling and refurbishing (cleaning/replacing the parts for draw-in and serve out the disc).
Thank you very much for posting some URL's.
 
That requires opening up the device...and there are many ways to do that, model to model.
You need to open the laptop or portable, and sometimes the damage is physical misalignment of the tray.
On some, the tray comes out enough to expose the lens, but otherwise it is a teardown job with snap notches, and those get damaged.
Best get an external USB drive for yourself, as the parts have gone out of production.
And back up your disks to other media...cloud or HDD.
 
That requires opening up the device...and there are many ways to do that, model to model.
You need to open the laptop or portable, and sometimes the damage is physical misalignment of the tray.
On some, the tray comes out enough to expose the lens, but otherwise it is a teardown job with snap notches, and those get damaged.
Best get an external USB drive for yourself, as the parts have gone out of production.
And back up your disks to other media...cloud or HDD.
You completely misunderstood me. It's not about the repair service for laptops or the built-in DVD drives, even if I mentioned that they are mainly used there.
It's about repair service from devices as to find in the attached images, where are in use mostly dvd drives in the same kind than in PC's.
 

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So the disc is carried on a tray that is not visible?
Fine, but same observations apply.

Many models, parts hard to find, particularly for models that did not sell in large volumes.
Some may be substituted.
Basically, belts, slides, and the laser pickups are the main areas, then spindle motors. All are going out of stock. I have DVD players waiting for lasers since 2018.

Long term, buy and store a few as spares.