HP LaserJet Pro 400 Service Manual - Page 221
Problem, Cause, Solution, repeated image displays.
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Problem Text or graphics are skewed on the printed page. Cause Solution The media might be loaded incorrectly. Ensure that the paper or other print media is loaded correctly and that the media guides are not too tight or too loose against the stack. The media might not meet HP specifications. Use a different paper, such as highquality paper that is intended for color laser printers. The printed page contains wrinkles or creases. Toner displays around the printed characters. The media might be loaded incorrectly. Verify that the media is loaded correctly and that the media guides are not too tight or too loose against the stack. Turn over the stack of paper in the input tray, or try rotating the paper 180° in the input tray. The media might not meet HP specifications. Use a different paper, such as highquality paper that is intended for color laser printers. The media might be loaded incorrectly. Turn over the stack of paper in the tray. If large amounts of toner have scattered around the characters, the paper might have high resistivity. Use a different paper, such as highquality paper that is intended for color laser printers. An image that displays at the top of the page (in solid black) repeats farther down the page (in a gray field). Software settings might affect image printing. In your software program, change the tone (darkness) of the field in which the repeated image displays. In your software program, rotate the whole page 180° to print the lighter image first. The order of images printed might affect printing. Change the order in which the images are printed. For example, have the lighter image at the top of the page, and the darker image farther down the page. A power surge might have affected the device. If the defect occurs later in a print job, turn the device off for 10 minutes, and then turn on the device to restart the print job. Use non-glossy media to help reduce the severity of the defect ENWW Solve image-quality problems 195