HP 4300 Service Manual - Page 324

Media transport problems If media is feeding incorrectly, use the information in this section to identify and resolve the problem. Multiple pages feed Table 49. Causes for multiple pages feeding Cause Solution The tray 1 separation pad is worn. Replace the separation-pad assembly. Too much media (particularly envelopes) is loaded Remove some of the media and resend the print job. in tray 1. The separation rollers in the tray are worn or damaged Replace the rollers. See "Tray 2 feed rollers" on page 141 for tray 2, or "500-sheet feed rollers" on page 204 for a 500-sheet feeder, or "1,500-sheet feeder feed rollers" on page 214 for a 1,500-sheet feeder. The media edges are locked together. Flex the media stack before loading it into the printer. Do not fan the media. Paper is wrinkled or folded Table 50. Causes for wrinkled or folded paper (part one, paper path entrance) Cause Solution The feed rollers or registration rollers are dirty or Replace the affected rollers. defective. The paper path contains foreign substances or dirt. Remove any foreign substances or dirt from the paper path. The cartridge shutter open/close mechanism is damaged. (This can cause jams in which the media is crumpled into an accordion fold under the print cartridge.) The shutter in the print cartridge should open as you insert the cartridge. If a shutter does not open, replace the print cartridge. Table 51. Causes for wrinkled or folded paper (part two, paper path exit) Cause Solution The fuser inlet guide is dirty. Replace the fuser. See "Fuser" on page 162. The fuser pressure roller is dirty or damaged. Run several cleaning pages through the printer. See "Running the cleaning page manually" on page 56. If the problem persists, replace the fuser. See "Fuser" on page 162. 304 Troubleshooting Q2431-90912