Laser printer print defects - Black page
||Defective toner cartridge
||Install a new toner cartridge|
||High voltage power supply circuit is defective (not supplying the correct negative voltage)
||Replace the High Voltage Power Supply PCA
||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