HP 4600 Service Manual - Page 357
Media-transport troubleshooting, Multiple s are fed, Media is wrinkled or folded, Print/Stop
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Media-transport troubleshooting If media is feeding incorrectly, use the information in this section to identify and resolve the problem. Multiple pages are fed The following table describes the causes of and solutions for multiple pages feeding. Table 7-14 Causes for multiple pages feeding Cause The separation tabs in the cassette are damaged (tray 2, tray 3, or tray 3/4 [2 x 500 sheet feeder]). Solution Straighten the tabs on the front corners of the tray, or replace the cassette. NOTE The HP Color LaserJet 4610n does not support tray 3 or tray 3/tray 4. Tray 3/tray 4 is supported only on the HP Color LaserJet 4650 models. The multipurpose tray separation pad is worn. Replace the separation pad assembly. The multipurpose tray separation pad has a defective spring. Make sure that the spring is set in place. If the spring is damaged, replace the separation pad assembly. Media is wrinkled or folded To diagnose the cause of wrinkled or folded media, use the Print/Stop test in the Diagnostics menu. Adjust the stop time to stop the media before it enters the fuser. Open the ETB. If the media is wrinkled at this stage, use Table 7-16 Causes for wrinkled or folded paper (part two: paper-path exit) to diagnose the problem. If the media is not wrinkled at this stage, use Table 7-15 Causes for wrinkled or folded media (part one: paper-path entrance) to diagnose the problem. Table 7-15 Causes for wrinkled or folded media (part one: paper-path entrance) Cause The registration shutter is defective. The feed roller or registration roller is dirty or defective. The paper path has foreign substances or dirt. The cartridge shutter open/close mechanism is damaged. (This applies to jams in which paper is crumpled into an accordion fold somewhere on the ETB belt.) Solution Make sure that the registration shutter is clean and moves smoothly. If the registration shutter is worn or damaged, replace the paper pickup assembly. Replace the paper pickup assembly. Remove any foreign substances or dirt from the paper path. If the feed guide is damaged, replace the paper pickup assembly. The shutters in each print cartridge should open as you close the ETB. If a shutter does not open, replace that print cartridge. Also check for a damaged shutter mechanism in the printer. Table 7-16 Causes for wrinkled or folded paper (part two: paper-path exit) Cause The fuser inlet guide is dirty. Solution Clean the fuser inlet guide. ENWW Media-transport troubleshooting 341