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7-52 Troubleshooting
EN
High voltage power
supply circuit is
defective (not
supplying the correct
negative voltage).
Replace the High Voltage Power Supply PCA.
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 DC Controller Board and check the
connectors for damage. Reseat the DC Controller
Board, being certain to fully seat the connectors.
Bad Primary Charging
Roller.
Replace the Toner Cartridge.
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.
Laser/Scanner
Assembly is faulty
(turning laser on
continuously).
Replace Laser/Scanner Assembly.
Table 7-10. Black Page (continued)
Possible Cause Action
Defective Toner
Cartridge.
Replace the Toner Cartridge.
Light is leaking into
the printer.
Ensure all covers are in place.