Table 7-26. Black Pages (continued) Possible Cause Recommended Action 3. 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. Inspect and clean the high voltage contacts. If damaged, replace the High Voltage Power Supply PCA. See “High Voltage Power Supply (HVPS)” on page 215 for instructions. 4. High voltage power supply circuit is defective (not supplying the correct negative voltage). Replace the High Voltage Power Supply PCA. See “High Voltage Power Supply (HVPS)” on page 215 for instructions. 5. DC Controller PCA is defective.
If the DC Controller turns on the laser beam continuously, the entire surface of the Photosensitive drum is neutralized causing a completely black page. Replace the DC Controller PCA. See “PCA, DC Controller” on page 207 for instructions. 6. Laser/Scanner Assembly is faulty (turning laser on continuously). Replace the Laser/Scanner Assembly. See “Laser/Scanner Assembly” on page 200 for instructions. 7. Connectors between the Laser/ Scanner unit and DC Controller are not seated properly or are defective. Inspect and reseat the connectors. Replace cables as necessary. Table 7-27. Fading Print Possible Cause Recommended Action 1. Toner supply is low.
Shake the cartridge gently to redistribute the toner, or replace the cartridge. 2. Print Density is set incorrectly. Change to a darker setting and retry printing. 472 Chapter 7 Troubleshooting C4085-91087