| Problem |
Cause |
Solution |
How common* |
Comments |
| black pages |
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 |
10 |
|
| black pages |
Defective toner cartridge |
Replace the toner cartridge |
9 |
4 |
| black pages |
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. |
2 |
|
| black pages |
High voltage power supply circuit is defective
(not supplying the correct negative voltage) |
Replace the High Voltage Power Supply PCA |
10 |
some printers have the high voltage power supply
on the DC controller. |
| black pages |
Laser/Scanner Assembly is faulty (turning laser
on continuously) |
Replace the Laser/Scanner Assembly |
5 |
|
| black pages |
Light is leaking into the printer |
Make sure that all covers are in place |
2 |
possible, but not likely |
