I'm pretty sure that most Epson printers have a manual release switch for this.
Have a look around the left hand side of the thing the ink cartridges fit into. There should be a white plastic switch poking through the metal plate at the back. Seem to recall its nigh on impossible to get to with your hands, so poke at it with a screwdriver (gently, of course!). That should release the mechanism so you can move it manually.
PS: Don't blame me if you break it. ;)
Have a look around the left hand side of the thing the ink cartridges fit into. There should be a white plastic switch poking through the metal plate at the back. Seem to recall its nigh on impossible to get to with your hands, so poke at it with a screwdriver (gently, of course!). That should release the mechanism so you can move it manually.
PS: Don't blame me if you break it. ;)