Table 5-3. Solving image quality problems Problem Cause Solution Blank pages are always printing. The toner cartridge was improperly installed. Make sure you removed the entire length of the sealing tape from the toner cartridge before you installed it. The toner cartridge is completely out of toner. Replace the toner cartridge. Discontinuity exists in the high-voltage contact points. Perform the “High-voltage power supply check,” which is discussed later in this chapter. There is a problem in a part of the product. Print a self-test page. If the page is blank, follow the steps in “Basic troubleshooting” to isolate the problem. Replace the laser/ scanner or the ECU as needed.
Print is misaligned on the page (skewed pages). The paper input bin is overfilled. Remove some of the paper. The guides are adjusted improperly. Be sure to center the paper with the paper guides. Also, verify that the paper guides are not adjusted too tightly or too loosely against the paper. The paper’s weight or surface finish does not meet HP’s specifications. Make sure that the media meets specifications detailed in HP’s media specifications guide. Scanned images have black dots or streaks in top and bottom margins. There is ink, glue, white-out, or some other substance on the contact image sensor. See “Cleaning procedures” in this chapter. There is a problem in the contact image sensor.
Replace the contact image sensor. 132 Troubleshooting/Maintenance C4224-90962