I cannot repair my washing machine without documentation. I have no idea how to use my multimeter to check the components. There are parts dealers for Beko in my area, but none of them have the service manual.

They say go to the website for the manual as a flippant off-the-cuff answer. There are no service manuals on the Beko website -- at least not for my model. The navigation of the Beko website does not even have a path to docs. And worse, my model is treated as non-existent by the website.

What would I do if I were a professional repair service? What is the official channel?

I am open to “piracy¹” but it would be a long shot to scour all the dark web for a manual for a specific washing machine. It’s not the type of content people have a strong interest in spreading/trading.

¹As RMS says, it’s not a just term for it but sharing is awkward too.