HP Color LaserJet CM4730 Service Manual - Page 632

Media transport problems The following issues can cause media transport problems Multiple pages feed. Cause Solution The tray 1 separation pad is worn. Replace the separation pad assembly. Too much media (particularly envelopes) is loaded in tray 1. Remove some of the media and resend the print job. The separation and feed rollers in the tray are worn or damaged Replace the rollers. The media edges are locked together. Flex the media stack before loading it into the MFP. Do not fan the media. The media is wrinkled or folded. Cause Solution The feed rollers or registration rollers are dirty or defective. Replace the affected rollers. 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. NOTE: To diagnose the cause of wrinkled or folded media, use the Print/Stop test in the Troubleshooting menu. Adjust the stop time to stop the media before it enters the fuser. The media is skewed. Cause Solution The paper dust or dirt has accumulated in the cassette feed Clean the rollers. roller or registration roller. The cassette feed roller and registration roller are worn irregularly. Replace the paper pickup assembly. The separation roller is worn or damaged (Tray 2 or 2 X 500- Clean or replace the separation roller. If necessary, replace sheet feeder) the paper cassette. The registration shutter is defective. Clean or replace the separation roller. If necessary, replace the paper cassette. 612 Chapter 6 Problem solving ENWW