Hint If you find a defect that is not depicted, record the probable cause along with the conditions in the printing environment and save a copy of the defect for future reference. Table 7-11. Black Page Possible Cause Action The high-voltage power supply connections are contaminated. Clean the high-voltage power supply terminals. See Figure 7-20, “Engine Controller Board Layout,” on page 7-93. Also clean the high-voltage springs where they contact the Toner Cartridge. The high-voltage power supply is installed improperly. If the high voltage power supply has been removed and replaced, it may not be seated properly. Remove the Engine Controller Board and check the connectors for damage.
Reseat the Engine Controller Board, being certain to fully seat the connectors. Defective Primary Charging Roller. Replace the Toner Cartridge. The Laser Drive circuitry is damaged on the Engine Controller Board so that the laser is always on. Replace the Engine Controller Board, followed by the Formatter PCA if necessary. 7-58 Troubleshooting