HP LaserJet Pro 400 Service Manual - Page 220
Problem, Cause, Solution, Paper, Type is, Service, Less Paper Curl, Use a different paper
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Problem Cause Solution Marks repeatedly appear at even The device is not set to print on the type intervals on the printed side of the page. of media on which you want to print. In the printer driver, select the Paper tab and set Type is to match the type of paper on which you are printing. Print speed might be slower if you are using heavy paper. Internal parts might have toner on them. The problem typically corrects itself after a few more pages. The paper path might need cleaning. Clean the paper path. The fuser might be damaged or dirty. To determine if the fuser has a problem. Print-quality diagnostics page. Clean the paper path. A toner cartridge might have a problem. To determine which cartridge has a problem. Print the print-quality diagnostics page. Marks repeatedly appear at even intervals on the unprinted side of the page. Internal parts might have toner on them. The problem typically corrects itself after a few more pages. The paper path might need cleaning. Clean the paper path. The fuser might be damaged or dirty. To determine if the fuser has a problem. Print the print-quality diagnostics page. Clean the paper path. The printed page contains misformed characters. The media might not meet HP specifications. If characters are incorrectly formed so that they produce a wavy effect, the laser scanner might need service. Use a different paper, such as highquality paper that is intended for color laser printers. Verify that the problem also occurs on the configuration page. The printed page is curled or wavy. The device is not set to print on the type of media on which you want to print. In the printer driver, select the Paper tab and set Type is to match the type of paper on which you are printing. Print speed might be slower if you are using heavy paper. The Service menu item Less Paper Curl is Use the control-panel menus to change set to Off. the setting. The media might not meet HP specifications. Use a different paper, such as highquality paper that is intended for color laser printers. Both high temperature and humidity can Check the device environment. cause paper curl. 194 Chapter 2 Solve problems ENWW