Figure 3-44Black print-quality troubleshooting page

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1.

Grids

The grids are in inches and millimeters. They are label with

 

 

letters and numbers so that defects can be described by

 

 

position and by distance between repeats.

 

 

 

2.

Color plane registration (CPR) bars

After printing, the box with no extra color in each area on

 

 

each page shows how far off the CPR of that color is. Each

 

 

page has two process direction areas and three scan

 

 

direction areas that are labeled x and y and 1–11. The page

 

 

should be fed by the long edge. Each square from the center

 

 

equals 42 microns.

 

 

 

3.

Color ramp patches

Used to detect offset for the OPC or developer in the image

 

 

drum or offset in the fuser.

 

 

 

NOTE: To get further assistance in print quality troubleshooting, go to www.hp.com/support/ lj500colorM551 and select PQ Troubleshooting Tools.

ENWW

Tools for troubleshooting 299