I often doownload service manuals for my customers' laptops but I can't find one for your model from a known and trusted source. When I Googled, I found several but I can't recommend any that I know won't come with additions to the download.
Run the same search as I did - model reference and "service manual" and take a chance with any of them but scan for malware as soon as the download completes. If it's a PDF file it should be fine but if it comes in a ZIP folder, don't take the offer.