Label Manager 280
The ribbon compartment cover is linked with spring to a contraption of two plastic levers. These levers are pushing the thermal head toward to the roller when the back cover is closing.
In my case the spring was detached from the plastic lever because this plastic quality was poor and the little hole was cut.
I was forced to create a new hole and line the spring to this one. Oh dear, this was quite difficult task.
I still have some print quality issues since I nee to adjust the spring to push harder the head into the roller.