User manual
95.08.23.11.30
Color LaserWriter 12/600 PS Basics & Theory 1–84
Image Quality Stability Control
Outline The printer is protected by an image quality control system that mini-
mizes image density fluctuations caused by environmental changes,
photosensitive drum wear, and degradation of toner.
Intervals Image quality stability control is performed at the following intervals:
• When the power is turned on
• When the printer encounters an abrupt environmental change
• Following every 100 prints
• When a toner cartridge is installed
• When a new photoconductor cartridge is installed
Environment-change correction control start
Environment detected
Primary charging voltage determined
Transfer bias determined
Discharge bias determined
Attraction bias determined
Separation discharge determined
Density detected
Developing bias determined
End
Halftone correction table determined
Density detected
Environment-change correction control end
Maximum density control start
Maximum density control end
Halftone correction control start
Temperature/Humidity
Sensing
Density Calibration