Specifications

Flowcharts and TablesTroubleshooting
Black Horizontal Lines (Continued)
Step Check Result Action
6 Remove the top cover, side
covers, rear cover, I/O
board mount, and the
power switch lever.
Remove the high-voltage
contact assembly and
check the continuity on all
the high-voltage contacts.
Do you find continuity on all
the high-voltage contacts?
No Replace the high-voltage contact
assembly.
7 Replace the DC controller
board. Does the print
quality improve?
Yes Problem solved.
8 Replace the toner cartridge
sensor and high-voltage
power supply cable. Does
the print quality improve?
Yes Problem solved.
9 Replace the high-voltage
power supply. Does the
print quality improve?
Yes Problem solved.
10 Replace the I/O board.
Does the print quality
improve?
Yes Problem solved.
Table 22. White Horizontal Lines
Step Check Result Action
1 Check the paper in the
paper cassette tray for
dampness. Is the paper
damp?
Yes Replace the paper.
2 Replace the toner cartridge.
Does the print quality
improve?
Yes Problem solved.