HP 5100 Service Manual - Page 219

Table 45. Faded or light print Possible cause Action Begin by performing the half self-test function check (see page 224). If the image on the print drum is light, proceed with actions 1, 2, 3, 6, 7, and 8. If the drum image is normal, proceed with actions 5, 6, and 8. Toner supply is low. Action 1 Shake the cartridge gently to redistribute the toner, or replace the cartridge. EconoMode is on. Action 2 EconoMode saves toner by Turn EconoMode off. reducing the dot density. The effect might appear to be a print-quality problem in some cases. Print density is set incorrectly. Action 3 Change toner density (in the print-quality menu) to a darker setting and try again to print. Media does not meet Action 4 specifications. The moisture Try a different paper lot. content, conductivity, or surface finish might not work correctly with the electrophotographic process. Transfer roller is defective or Action 5 incorrectly installed. If the Inspect the transfer roller for correct installation and contact. If the transfer transfer roller loses roller is damaged, replace it. conductivity, it cannot effectively pull toner from the drum to the paper. High-voltage connector springs are dirty or defective. Action 6 The high-voltage connectors are mounted on and above the dc controller and protrude into the toner cartridge cavity. Check the springs for functionality. Clean if dirty, replace if defective or missing. Laser/scanner door is not opening correctly. Action 7 1. Remove and reseat the toner cartridge. 2. Check the laser/scanner shutter door for proper operation. If it is defective, replace the laser/scanner assembly. The dc controller is defective. The dc controller contains the high-voltage circuitry. Action 8 Replace the dc controller. Q1860-90918 Chapter 7 Troubleshooting 217