User`s guide

Flowcharts and TablesTroubleshooting
Table 14. Uniformly Dark Image Over Entire Page
Step Check Result Action
1 Adjust the density using the
Printer Utility. Does the
problem persist?
No Problem solved.
2 Try printing with
known-good paper. Does
the problem persist?
No Problem solved.
3 Clean the printer drum
grounding contact and
cartridge contact and print
a test page. Does the
problem persist?
No Problem solved.
4 Remove the rear panel and
I/O shield. Place probes
between J210-6 (HVRST)
and J210-10 (GND). Does
the voltage change from 0
to 5 V about one second
after the printer starts up?
No
Ye s
Replace the DC controller board.
Replace the high-voltage power
supply. If the problem persists, replace
the high-voltage connector board.
Table 15. Black Vertical Lines, Sharp and Well-Defined
Step Check Result Action
1 Try a known-good toner
cartridge. Does the
problem persist?
No Problem solved.
2 Does the symptom occur
on a service test page?
No
Ye s
Replace the I/O board.
Replace the fuser assembly. If the
problem persists, replace the
laser/scanner assembly.