Oce CS2436 User Manual page 630

Maintenance (CS2436-10)
3.
Pull the Printhead Fixer Lever forward all the way to open it completely.
4.
Pull up the Printhead Fixer Cover to open it completely.
Do not touch the Linear Scale (a) or Carriage Shaft (b). Touching
these parts may damage them.
Never touch the metal contacts of the Carriage. This may damage
the printer.