HP 5100 Service Manual - Page 217

Table 41. Dark print Possible cause Action Wrong toner density setting. From the print-quality menu on the control panel, adjust the toner density setting. Toner cartridge print drum is Replace the toner cartridge. close to the end of its life. Media does not meet the printer specifications or is stored improperly. 1. Print a few more pages to see if the problem corrects itself. 2. Turn over the stack of paper in the tray. Also try rotating the paper 180°. 3. Check the paper (or other print media) type and quality. Replace the paper, and advise the customer to use the recommended media and to store it correctly. Poor high-voltage contact to Clean the contacts if they are dirty. If the problem remains after cleaning, or the dc controller. if the contacts are damaged or deformed, replace them. Defective laser/scanner. Replace the laser/scanner. Defective high-voltage circuitry. Replace the dc controller. Table 42. Dirt on back of page Possible cause Action Dirt inside printer (on tray separation pad or roller, feed roller, transfer roller, fuser, toner cartridge, feed belt, feed guide). 1. Print a cleaning page (see page 67). 2. Print at least 10 pages to see if the problem goes away. 3. Identify and clean the dirty part. Also see "Repetitive defect ruler" on page 223. If the dirt cannot be removed, replace the dirty part. 4. Check for toner leaks. Media does not meet the printer specifications or is stored improperly. 1. Print a few more pages to see if the problem corrects itself. 2. Turn over the stack of paper in the tray. Also try rotating the paper 180°. 3. Check the paper (or other print media) type and quality. Replace the paper, and advise the customer to use the recommended media and to store it correctly. Q1860-90918 Chapter 7 Troubleshooting 215