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4-26 Service Tests
HP DesignJet CP Series Printers
D12. Image Quality
The purpose of this test is to verify the image quality attributes of the
printer.
Perform the Image Quality test as follows:
Load media before performing this Test.
1 In the Diagnostics submenu, scroll to “D12 Image Quality” and press
Enter.
Diagnostics
D12 Image Quality
2 If media is not loaded the test will stop and the message “Load Media to
align Printheads” will be displayed on the front-panel. Load media in
order to continue the test.
3 The printer will print two printhead alignment patterns. During the
printing, the message “Aligning Printheads” will be displayed on the
front-panel.
4 If after aligning the Printheads the message “Bad Printhead Alignment”
is displayed on the front-panel then try the following to solve the
problem:
1 Try recovering the printheads using the front-panel menu and try the
test again.
2 If the test fails again, check the alignment pattern to check if any of
the colors are printed badly. If a color is printing badly then replace
the complete Ink Delivery System of the color that is bad.
3 The Line Sensor is not calibrated correctly. Perform the Line Sensor
calibration ' page 5-10.
4 The lens cover, which is installed on the line sensor, is dirty. Replace
the lens cover ' Users Guide, Chapter 10 (Lens Maintenance).
5 Check if the Line Sensor is installed and connected correctly.
6 Perform the Line Sensor Test ' page 4-10.
7 Perform the Electronics Test ' page 4-7.
The test is continued on the next page.