Gray Balance - Xerox Phaser EX7750 Color Manual

2
2-21 Calibrating from the Control Panel using VisualCal

Gray Balance

The second VisualCal page, "Gray Balance," provides the basis for calculating a
"neutral gray balance," that is, a CMY gray that as closely as possible matches a pure K
(blacK) gray produced by the printer's engine. This page consists of rows of CMY gray
patches on a field of gray produced solely from black. The variables needed to calculate
the printer's most neutral gray balance are determined by identifying the CMY patch
that best matches this field, and entering its row and column location on the Control
Panel. When the values have been entered, the printer's gray balance is recalculated.
T V C
O PERFORM ISUAL AL CALIBRATION
1. At the Idle screen, press the Menu button to enter the Functions menu.
2. Choose Calibration, and then choose Set Up Calibration.
If a password is set on the EX7750, enter it and press OK.
3. For Calibration Mode, select Standard or Expert.
Expert Mode adds the option to print a Comparison Page (see
4. At the main calibration screen, select Calibrate.
5. For Media, choose the media type for the calibration.
6. Select Yes to print the Limits and 30% Match page.
To reset the printer's toner density and luminosity settings, follow the instructions
provided on the Limits and 30% Match page. Use the touch screen to change
numbers. Do not use the numerical keypad.
Zero (0) and 9 are unacceptable values for color calibration. If you select 0 for
N :
OTE
any of the colors, the resulting calibration is inaccurate. If you select 9, the Limits and
30% Match page is reprinted automatically with the densities shifted to enable you to
enter a number less than 9. Re-enter values for all color rows starting with Black Start.
When you finish entering all values, the
page
screen appears.
PRINT GRAYS
2-8).