3-10
Ink Supplies Troubleshooting
HP Designjet 4000/4020 Printer Series Service Manual
Printhead Status Messages While Printing
Detailed below are the printhead status messages that may be displayed
while printing.
OK The printhead is operating correctly and will provide an acceptable level of
print quality. To find more information on the printheads, refer to Page 3-7,
Obtaining Printhead Information.
Replace The Printhead is faulty and needs to be replaced before the printer can
continue printing.
If this message continues to appear (for example after installing new
Printheads), try the following:
1 Reseat the Printheads and check if the message disappears.
2 Remove the Drop Detector and make sure that there are no obstacles inside
which are blocking the sensor.
3 Print the Diagnostic Print ⇒ Page 6-6. Check that the Printhead nozzles are
firing correctly.
4 Perform the Service Station Calibration ⇒ Page 5-8.
5 Replace ALL the Printheads.
Printhead Status Messages While Replacing
The following are the Printhead status messages that may be displayed while
replacing the Printheads.
Reseat In this situation, select the Printhead replacement option through the Front
Panel but do NOT remove the Printheads. If this status message continues to
appear then remove the Printheads and install them again.
Remove The Printhead is not a suitable type for use in printing (for example, a Setup
Printhead).
Missing No Printhead has been detected in that Carriage stall. If a Printhead is
installed in the Carriage stall when this status message is shown:
1 Reseat the Printhead, making sure it is installed correctly.
2 Clean the Carriage and Printhead flex circuits using the Carriage
Interconnect Wiper ⇒ Page 3-14.
3 Replace the Printhead.
4 Perform the Electronic Systems Test ⇒ Page 4-17.
If all 8 Printheads are installed but have the Status message
"Missing", it is possible that the Carriage Assembly is faulty.
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