Streaks Or Lines Down The Print - Xerox Phaser 840 Service Manual

Streaks or lines down the print

Table 3-9 Streaks or lines down the print
Step Question and Actions
Clean the wiper blade of the drum maintenance drawer. Inspect the operation of
1
the drum maintenance kit.
Replace the Maintenance Kit if necessry.
Clean the stripper fingers or rapid release guide.
2
The x-axis drive is not functioning correctly. If the X-axis drive does not slew the
3
printhead smoothly and evenly during printing, vertical lines appear in the print.
Print Service Test Print 1 "X-axis" to reveal an X-axis problem. Ensure that no
wiring harnesses are interfering with the horizontal slewing of the printhead.
Replace the X-axis drive, if indicated.
Calibrate the x-axis scale as described in the topic "X-axis scale adjustment" on
4
page 4-149.
Check for media in the exit path.
5
If streaks are on the front side of a 2-sided print, the paper preheater may be
6
scraping ink off the print. Look for ink shaving alongside the streak. Clean the
preheater using the front panel initiated cleaning process "Remove ink smears."
Smears on a duplex print can also be caused by the paper preheater operating at
7
a too high temperature. Use the PC-diagnostics to check the paper preheater's
temperature. Replace, if necessary.
Possible missing, weak or contaminated jet. Print the service test print
8
Weak/Missing Jet to determine if a jet is not performing. Refer to the following
procedure "Missing ink or light colored ink band running length of print" on
page 3-89.
Replace the power control board.
9
There are several possible causes of streaks
running down the length of a print.
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Troubleshooting 3 - 91