We have all been at a point where we were so annoyed with a printer glitch that we would have liked to thrash the useless piece of junk. Apparently the folks at HP Support share our grievances, as they encourage us to throw their own products out the window and to celebrate the accomplished task. On various HP support pages relating to All-In-One printers (for example here) I found the following step-by-step instructions that are given to make jammed carriages work again:

この記事は日本語訳があります!こちらをクリックしてください。 Japan flag

The Brother MFC-8820J is a black/white laser printer/scan/copy/fax machine that was apparently released only in Japan. Its better known international cousin is the MFC-8820D, which is probably identical in design. There are several ways to make this multifunction device work under Linux, depending on your distribution and your needs.