Konica Minolta PKG-675i PKG-675i User Manual - Page 116

Print Quality (PQ) Defects Area Fills exhibit a "Sand Dune" effect Patterns appear in Area Fills that resemble "sand dunes", "herringbones", "ship wakes", etc. This defect is caused by excessive Printhead-Paper Spacing (PPS). A change in PPS can occur if the Printhead Cartridge is not seated properly or if something has mechanically changed in the printhead sockets. Solution Make note of which PHC is contributing to the defect. It should coincide with a PHC that has been recently installed in the printer. Remove and reseat the printhead. It appears as if there is lint spread out down the page. The photo illustrates a severe case, but less obvious cases can also occur. This defect can appear in printed areas as well as unprinted areas of the media. Solution Print Quality (PQ) Defects "Linty Look" - "Scuff Marks" on Media This can be caused by an insufficient PPS - the printhead face is too close to the media - or ink mist condensing back onto the printhead. Either case can cause tiny ink smudges if the media touches the printhead. If the PPS had recently been changed, or a service station replaced, check the PPS and make any necessary adjustments. If a printhead has been replaced and the smears on the printed page correspond to this printhead, then remove and reseat the printhead. Inspect the printhead(s) that correspond to the smears. If excess ink is present on the face of the printhead, then perform a recovery level '1' on the printhead(s), or clean it as needed. DOCUMENT I 18.40V02 - Update: 04.09.2019 OPERATIONAL MANUAL Page 116