HP Latex 1500 User guide - Page 396

- Blurred lines, edges, and text, horizontally and vertically - Halo of a different color around color lines and at the edges of color areas or text - Ink bleeding or wicking or different gloss at the edges of color areas 2. Perform the actions described in the following table. Table 13-3 Actions to perform Defect Image quality inspection plot procedure Substrate-advance sensor check Printhead alignment Possible causes (for reference only) Horizontal banding X - - ● Blocked nozzles ● Substrate advance accuracy ● Intra-color alignment Isolated bands (usually of - X - different texture or grain) ● Substrate-advance accuracy and navigability Graininess - X X ● Substrate advance accuracy ● Color alignment Blurry edges or text lines, - X X horizontally ● Substrate advance accuracy ● Color alignment Blurry edges or text lines, - - X vertically ● Color alignment Color halo on objects - - X (e.g., magenta shows up ● Color alignment under a blue line) Ink bleeding, wicking, or - - X different gloss at the ● Optimizer edges of color areas alignment Printhead check and clean The check and clean process will check the printheads, recover the ones with blocked nozzles, and replace the nozzles that are not recovered with healthy ones for printing. See Check and clean the printheads on page 122. Substrate-advance sensor check Run the OMAS Diagnostic Test from the HP Print Care window. The test will tell you whether the substrateadvance sensor is working correctly or not (either dirty or damaged). NOTE: OMAS stands for Optical Media Advance Sensor, usually known as the substrate-advance sensor in this guide. If the substrate-advance sensor is dirty, clean the sensor. See Clean the substrate-advance sensor on page 230. 388 Chapter 13 Troubleshoot print-quality issues ENWW