4026-0XX
Diagnostic Information 2-39
Spot or Marks At Same Spot On Every Print
Note: Do not expose the photoconductor to light any longer than
necessary when you remove the photoconductor unit from the
printer.
Blank Page
All Black Page
Note: Incorrect laser exposure or incorrect charging of the photo-
conductor causes an all black page.
FRU Action
1
Photoconduc-
tor Unit
Assembly
Remove the photoconductor unit assembly and
check the photoconductor for voids, spots, or
damage.
2
Fuser Paper
Separators
If black spots are observed approximately 70
mm apart, check the fuser paper separators for
toner buildup. Clean or replace as necessary.
FRU Action
1
Toner C ar-
tridge
Remove the toner cartridge and gently shake
the assembly to evenly distribute the toner.
2
Printhead Be sure the printhead actuator in the top cover
actuates the printhead switch in the printhead
assembly.
3
Printhead
Assembly
Blank pages can be caused by a defective print-
head assembly or engine board. If the toner car-
tridge is operating correctly, replace the
printhead assembly. If this does not correct the
problem, replace the engine board.
FRU Action
1
Right Side
Frame Termi-
nals
Check for a bent, broken, contaminated, or pit-
ted drum charge bias terminal or drum ground
terminal located on the right side frame.
Replace as necessary.
