Table 7-35. Faulty Registration Possible Cause Recommended Action 1. Paper tray is overloaded. If the tray is overloaded, the Pickup Rollers may not pick correctly. Reload proper amount of paper squarely in the tray. Review paper loading with the customer. 2. Paper guide on the paper tray is incorrectly adjusted. If the guide is pushing too tightly against the paper, it may be delayed in being pulled into the printer. If the guide is too loose, it may cause image skewing. Make sure that the paper guide is adjusted for the correct paper size and is locked into position. 3. Paper does not meet specifications.
The surface of the paper may be too smooth for the Pickup and Feed Rollers to correctly feed paper into the printer. Try a different paper lot (see HP LaserJet Printer Family Paper Specifications Guide). 4. Drive gears are worn or broken. If any gear within the drive train or paper path becomes excessively worn or dirty, erratic paper movement can result. Replace the defective gear or Main Drive assembly. See “Main Gear Assembly” on page 202 for instructions. 5. Worn Pickup or Registration Rollers. Paper is not being picked up consistently. Inspect all paper path rollers, looking for wear, cracks, or glazing. Replace the worn rollers. Table 7-36.
Image Skew Possible Cause Recommended Action 1. Paper is loaded incorrectly. If the paper is not installed flush into the paper tray, a skewing problem will result. Remove paper from the tray, and install paper correctly. Position the paper guide correctly for the paper size being used. 2. Paper size adjustment levers are missing or installed incorrectly. Verify and correct. 480 Chapter 7 Troubleshooting C4085-91087