One full 360‑degree turn of the printhead screw will change the skew on both edges by roughly 0.5mm (one alignment
indicator dot).
Warning—Potential Damage: Caution should be taken to not turn the printhead adjustment mechanism more
than a few turns counterclockwise, for the screw will fully back out and will become disassembled. Stop turning
the screw when you stop feeling resistance, you may need to turn it clockwise to re-engage the screw into the
adjustment plate. Turning more than a few turns clockwise will bottom out the screw. If the adjustment screw is
difficult to turn, make sure that the printhead mounting screws are loose.
Warning—Potential Damage: In some cases the adjustment process may take several tightening and loosening
cycles of the printhead mounting screws. Care should be taken to avoid stripping the mounting screw bosses.
Use only a manual hex head screwdriver, for this reason.
6 When you have the correct adjustment, ensure that the printhead mounting screws are properly tightened, and
print a final Quick Test Page for verification.
7 Check the top edge skew and perform the media aligner roller adjustment, if required. See “Media aligner roller
adjustment” on page 283.
ADF skew adjustments
• “ADF skew adjustment (front side)” on page 287
• “ADF skew adjustment (back side)” on page 288
• “ADF skew adjustment (deskew roller)” on page 289
For ADF skew adjustment, refer to the following examples to identify whether the skew is negative or positive, which
will help you make the correct adjustment.
Note: Before you start any of the ADF skew procedures, make sure the media aligner roller adjustment has been
properly performed.
ADF skew adjustment (front side)
1 Remove the ADF rear cover. See “ADF rear cover removal” on page 470.
2 Remove the flatbed glass cushion. See “Flatbed glass cushion removal” on page 504.
3 Loosen but do not remove the three nuts and four screws (A) securing the adjusting bracket to the ADF frame, as
shown.
7463
Repair information
287
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