5-6 Phaser 7750 Printer Service Manual
Analyzing the Test Pattern
1. Color Registration (Horizontal): The colored lines should match up as shown 
below. If necessary see the registration procedures in Chapter 6. 
2. Color Registration (Vertical): The colored lines should match up as shown below. 
If necessary see the registration procedures in Chapter 6.
3. Uniform RGB: The secondary color squares should be uniformly colored with no 
mottling.
4. Density: The color squares should have even density from top to bottom.