HP 250C - Manual (Page 194)

8Ć60 Troubleshooting C4699Ć90000
ThetaĆZ Error
Errors numbered 3a and 3b are called ThetaĆZ errors. They appear when the rows of nozzles
on a cartridge are not perpendicular to the carriage axis (YĆaxis).
This error can occur for various reasons, including:
D Badly seated cartridge.
D Faulty cartridge.
D Faulty carriage.
Ink Smearing
Symptoms
Ink smears on the media. (See also ' User's Guide, chapter 4.)
Product Fault
The media touches the print heads. This can occur because:
D The mediaĆholding mechanism is not holding the media correctly, and the media buckles.
D The carriageĆtoĆroller distance is too small. (Adjustment ' chapter 7.)
Hue Changes
Symptoms
Changes of hue are noticed when printing in color.
Cartridge Fault
One or more of the print cartridges is running out of ink. (Typically the inks of the four
cartridges are used at different rates.)
Solution
Replace the print cartridge with a new one.
Starwheel Marks
On some drawings (for example, CAD drawings having a thickĆlined frame around them) on
some types of media, you may notice some small marks made by the starwheels. These
cannot be avoided.