Table 7-27. Fading Print (continued) Possible Cause Recommended Action 3. EconoMode is on. EconoMode saves toner by reducing the dot density. This may appear to be a print quality problem in some cases. Turn EconoMode off. Verify that EconoMode is not being enabled by either the printer driver or the job application. 4. Paper does not meet specifications. The moisture content, conductivity, or surface finish may not work correctly with the electrophotographic process. Try a different paper lot (see HP LaserJet Printer Family Paper Specifications Guide). 5. Transfer Roller is defective or incorrectly installed.
If the Transfer Roller loses conductivity, it cannot effectively pull toner from the drum to the paper. Inspect the Transfer Roller for proper installation and contact. If the Transfer Roller is damaged, replace it. See “Transfer Roller Assembly” on page 228 for instructions. 6. Laser/Scanner door is not opening properly. 1. Remove and reseat the toner cartridge. 2. Check the Laser/Scanner shutter door for proper operation. If defective, replace the Laser/Scanner Assembly. See “Laser/Scanner Assembly” on page 200 for instructions. 7. High voltage contact springs are dirty or defective.
The high voltage contacts are mounted on the High Voltage Power Supply PCA and protrude into the toner cartridge cavity. Check the contacts for functionality. If dirty, clean using alcohol; if damaged, replace the High Voltage Power Supply PCA. See “High Voltage Power Supply (HVPS)” on page 215 for instructions. 8. High Voltage Power Supply PCA is defective. Replace the High Voltage Power Supply PCA. See “High Voltage Power Supply (HVPS)” on page 215 for instructions. 9. DC Controller PCA is defective. The DC Controller supplies the proper voltage to the High Voltage Power Supply PCA. Replace the DC Controller PCA. See “PCA, DC Controller” on page 207 for instructions.
C4085-91087 Image Quality 473