Banding at variable extreme environmental conditions Since the Accuracy Calibration has been done at normal environmental conditions, printing in extreme environmental conditions will cause banding because the advance of the Media Advance Roller does not correspond to the same conditions that the calibration was done in. To solve the problem, try the following: Perform the Accuracy Calibration in the new environmental conditions (Refer to the User’s Guide). Worm marks on HP Coated media with light area fills Light bands (S-shaped) in Paper axis direction where light area fills are printed, causing unacceptable Image Quality defect.
● Print the Service Configuration Print and check if the level of Humidity is very low (below 30%). Increasing humidity may help in reducing the severity of the problem. NOTE: The media is causing the problem and NOT the Printer. Do not attempt to try and replace Printer parts to solve this problem. Solving Media-Handling Problems The Front Panel indicates that media is misaligned or incorrectly positioned. Roll media ● The roll may be loaded the wrong way. The paper should load over the roll toward you. ● Check that the paper is correctly loaded onto the spindle. ● The paper may be loaded at an angle. The right-hand edge must be aligned with the blue line on the Print Platen. NOTE:
Ensure that the paper is wrapped tightly on the roll. This is a very important step to remember because if this is not done, the media may be loaded at an angle, causing the media to be rejected. Sheet media ● Always load sheet media using the Rear Input Tray. Do NOT load the media as you would load roll media. ● It must be loaded with the right-hand edge against the blue line on the Print Platen. ● The media may be crumpled or warped or may have irregular edges. ● If hand-cut media is used, the edges may not form a right-angle or they may be rough. If possible, hand-cut media should not be used. Only purchased sheet media should be used in the Printer.
● If you have problems with paper jams, check that the Overdrive is not obstructed by bits of paper or using the Turn Drive Roller Service Utility 1. Turn Drive Roller on page 126 . ENWW Banding at variable extreme environmental conditions 7