HP 510 - Manual (Page 140)

Front-panel messages (continued)
Message Explanation and Action
Warning!
Machine calibrations need to
be performed. Refer to guide
for instructions. The color calibrations for the paper that is loaded have been lost.
Follow the procedure described in
Advance calibration .
Warning: color calibration not
done on this paper type The printer has detected that this paper type has not been color-
calibrated, and the system is configured to do it.
To calibrate color for the current paper type, select Ink menu
→
Color calibration → Calibrate paper.
Warning: printheads not
aligned The printer has detected that the printheads have not been aligned
since the last replacement.
You should align the printheads by selecting Align printheads from
the Ink menu.