User's Manual
Table 9-29 Color plane registrations defects (color models only)
Description Sample Possible solutions
Color plane registrations:
One or more color of the planes is not 
aligned with the other color planes. The 
primary error will typically occur with yellow.
1. Reprint the document.
2. From the printer control panel, 
calibrate the printer.
3. If a cartridge has reached a Very Low 
state or the printed output is severely 
faded, replace the cartridge.
4. From the printer control panel use the 
Restore Calibration feature to reset 
the printer's calibration settings to the 
factory defaults.
5. If the problem persists, go to 
support.hp.com.
Table 9-30 Output defects
Description Sample Possible solutions
Output curl:
Printed paper has curled edges. The curled 
edge can be along the short or long side of 
the paper. Two types of curl are possible:
● Positive curl: The paper curls toward 
the printed side. The defect occurs in 
dry environments or when printing 
high coverage pages.
● Negative curl: The paper curls away 
from the printed side. The defect 
occurs in high-humidity environments 
or when printing low coverage pages.
1. Reprint the document.
2. Positive curl: From the printer control 
panel, select a heavier paper type. The 
heavier paper type creates a higher 
temperature for printing.
Negative curl: From the printer control 
panel, select a lighter paper type. The 
lighter paper type creates a lower 
temperature for printing. Try storing 
the paper in a dry environment prior or 
use freshly opened paper.
3. Print in duplex mode.
4. If the problem persists, go to 
support.hp.com.
Output stacking:
The paper does not stack well in the output 
tray. The stack might be uneven, skewed, or 
the pages might be pushed out of the tray 
and onto the oor. Any of the following 
conditions can cause this defect:
● Extreme paper curl
● The paper in the tray is wrinkled or 
deformed
● The paper is a non-standard paper 
type, such as envelopes
● The output tray is too full
1. Reprint the document.
2. Extend the output bin extension.
3. If the defect is caused by extreme 
paper curl, complete the 
troubleshooting steps for Output curl.
4. Use a dierent paper type.
5. Use freshly opened paper.
6. Remove the paper from the output 
tray before the tray gets too full.
7. If the problem persists, go to 
support.hp.com.
130 Chapter 9 Solve problems ENWW










