HP Designjet 250c Service Manual - Page 194

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. 8Ć60 Troubleshooting C4699Ć90000