Adjustments; Adjusting Laser Power (Image Density); Checking Registration - Xerox Phaser 4500 Service Manual

Adjustments

Adjusting Laser Power (Image Density)

This adjustment procedure increases or decreases the output of the laser to lighten or
darken the printable image. This adjustment allows you to "tune" the image density to
accommodate a customer's special application.
Note
Adjusting laser power from the default value impacts other print-quality
parameters, such as background, halftone/fine line production, fuser fix, and
toner consumption. This adjustment should not be performed without first
discussing with the customer its potential impact on overall print quality.
To adjust the laser power:
1.
Enter Service Diagnostics.
2. Select Engine NVRAM
3. Select Laser
4. Press the Down Arrow or Up Arrow buttons to change the value, then press the
OK button.
Increasing the value increases image density. Decreasing the value decreases
image density. The default value is 4.
5.
Exit Service Diagnostics.
6.
Have the customer send a print job and examine the image density of the output.
7. Repeat steps 1 through 5 until an acceptable image density is achieved.

Checking Registration

This procedure checks the printer registration in the horizontal (scan) direction and
the vertical (process) direction for both simplex and duplex printing. If any
registration measurement does not meet the specification, perform the simplex
adjustment procedure on page 6-7 and/or duplex adjustment procedure on page 6-8.
1.
Enter Service Diagnostics.
2. Select Engine Test
3. Select Input
4.
Select the tray that requires verification, then press the OK button.
5. Print
Select
Adjustments and Calibrations
Adjustments, then press the OK button.
Power, then press the OK button.
Print, then press the OK button.
Tray, then press the OK button.
Quantity, then press the OK button.
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