HP Color LaserJet 8550 Multifunction Printer series - Manual (Page 274)

274 Chapter 8 Administration Functions
EN
Adjustment/cleaning
Administration (Additional) Functions allow you adjust and clean the
components of the copy module. The Adjustment/Cleaning menu
allows you to quickly and easily perform necessary adjustments and
cleaning functions for the copy module. Items in this menu include:
! Zoom Fine Adjustment
! Exposure Recalibration
! Automatic Gradation Adjustment
! Optional Automatic Document Feeder Cleaning
Zoom Fine Adjustment
Use Zoom Fine Adjustment to correct a slight difference in size
occurring between the original and the output copy images when the
copy ratio is set to 100%.