Oce CS4300 User Manual page 36

The scanner's Self Test Procedure
Self-Adjustment
2.
Adjustment of light profiles, stitching and black/white points.
Starts after the Init Sequence when the scanner's main power switch is turned ON or
right away when the scanner goes from sleep to wake mode.
The panel's LEDs will be lit as shown below:
36 Chapter 4 - Turning Power ON/OFF - Wake/Sleep Mode