Quick Reference Service Manual
11
HP DesignJet 2500CP and 2000CP Printers
D12. Image Quality
Purpose Ć Test the image quality attributes of the printer.
If after aligning the Printheads, Bad Printhead Alignment" is displayed Ć Try recovering the
printheads using the frontĆpanel menu. 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. Perform the Line Sensor calibration. Replace the lens cover '
Users Guide, Chapter 10 (Lens Maintenance). Check if the Line Sensor is installed/connected
correctly. Perform the Line Sensor Test. Perform the Electronics Test.
If the values of the Printheads are between -1.0 and +1.0 for any of the Printheads then
the test has passed.
If the values of the Printheads are NOT between -1.0 and +1.0 for any of the Printheads
then the test has failed Ć Perform the Printhead Alignment Calibration. Perform the Line
Sensor calibration. Replace the lens cover ' Users Guide, Chapter 10 (Lens Maintenance).
Perform the Electronics test. Check if the Media used is suitable for the printer. Check if the
Line Sensor is installed/connected correctly. Replace the Line Sensor.
D13. Printhead ID
Purpose Ć Check the default settings of the printheads. ID 200000 is for inks for imaging and
ID 220000 is for UV Durable Inks.
This test is for information only which might be requested in the event of an escalation.
D14. Printhead Continuity
Purpose Ć Check the primitives and address maps of the printheads.
The values shown for all Printheads should be 0. If a different value is shown then that
Printhead has a continuity problem. Try the following:
1 DO NOT replace any parts. This will cause extra problems. Remove the
Printheads and clean the flex contacts on the Carriage and the Printheads. Reseat the
Printheads and try the test again.
2 Even if one of the Printheads failed the Printhead Continuity test, you must remove all the
Printheads from the Carriage and try installing them one by one. Before installing each
Printhead, check the continuity of all four Printheads. The frontĆpanel should display a
3ffff / 3fff result for each Printhead that is not inserted and the original values (the value
that was displayed before the Printhead was removed) for the Printheads when they are
inserted. If you get a value that is different than 3ffff / 3fff when the Printheads are
removed then you must perform step 1 again. If you get the same results after repeating
step 1, then the carriage is damaged. Replace the Carriage Assembly. When you insert each
Printhead, the values should change only for that Printhead. If the values of other
Printheads also change, then the problem is the Printhead itself and not the actual Printer.
In this case you must replace the complete Ink Delivery System of the color that failed.
3 If you continue getting the original value (the value that was displayed before the
Printhead was first removed) then you must replace the complete Ink Delivery System of
the color that failed and try the test again.
4Asalast resort, replace Carriage Assembly.
D15. Clean Roller
Purpose Ć To rotate the Drive Roller when it requires cleaning.
