Table 5-3. Solving image quality problems Problem Cause Solution Print is faded or you notice a block of vertically aligned white streaks, The toner cartridge is getting low on toner. Redistribute the toner or replace the toner cartridge. The HP LaserJet 1100 Printer needs to be cleaned. See “Cleaning procedures” in this chapter. The paper you are using does not meet HP’s paper specifications (for example, it is too moist or too rough). Make sure that the media meets specifications detailed in HP’s media specifications guide. Toner density setting is not adjusted correctly. Adjust the setting from the control panel. or print is not faded, but vertical white stripes appear on the page.
A part of the HP LaserJet 1100 Printer is damaged. Follow the steps in “Basic troubleshooting” to isolate the problem. The internal mirror or optics are damaged. Clean the mirror by blowing air through the laser/scanner to remove any dust particles. The laser/scanner is damaged. Replace the laser/scanner. There is a problem in the contact image sensor. Follow the instructions in this chapter to recalibrate the document scanner. The document scanner needs to be recalibrated. Replace the contact image sensor. There is a problem in the formatter. Replace the formatter. Stains or smudges appear as small, round, black dots on the front or back of a page. Sometimes inconsistent stains appear.
The paper you are using does not meet HP’s paper specifications (for example, it is too moist or too rough). Make sure that the media meets specifications detailed in HP’s media specifications guide. You are printing on the wrong side of the paper. Remove the paper from the paper input bin and turn it over. (The wrapper on many reams of paper has an arrow indicating the print side.) The HP LaserJet 1100 Printer needs to be cleaned. See “Cleaning procedures” in this chapter for instructions on cleaning the product and using a cleaning page. The toner cartridge is damaged. Replace the toner cartridge if maintenance procedures do not improve print quality.
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