This is something of a hybrid between a side quest and an errand. It's a collection of related errands that can be performed once you have Sed in your party.
Throughout the game, if you have talked to all of the NPCs, you will discover a number of characters who are concerned about varying pieces of broken equipment. It turns out that Sed is something of a handyman and can repair all of the broken devices.
These are the individual errands that Sed can complete: