Printhead assembly adjustments
Printhead assembly mechanical adjustment
A printhead needs to be correctly positioned after it has been removed. Use a sharp pencil or a small, flat-blade
screwdriver to mark the location of the old printhead on the printer frame. Align the new printhead relative to the
location of the old printhead.
Note:
Skew is caused by a sheet being fed through the printer while misaligned. The entire image is rotated relative
to the sheet edges. However, a mechanically misaligned printhead causes the horizontal lines to appear skewed,
while the vertical lines remain parallel to the vertical edges. There are no adjustments for skew. Check the pick tires
for wear, the paper path for obstructions, the fuser for proper setting, and the tray paper guides for fit to the media.
Paper feed
skew
Printhead
misalignment
To adjust the printhead:
1
POR into the Diagnostics menu, and print a Quick test page:
Diagnostics Menu
>
Print Tests
>
Tray 1
>
Single
2
Fold the printed test page on the left side so that a few millimeters of grid lines wrap around the outside of the
fold.
3
Fold a second vertical fold near the center so that the left side top edge aligns with the right side top edge.
4514
Repair information
165
Summary of Contents for M1140
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Page 197: ...b Set the spring over the plunger 4514 Repair information 197 ...
Page 204: ...3 Squeeze the latches B to release the left and right links B 4514 Repair information 204 ...
Page 228: ...10 Remove the screw C and then detach the trailing edge sensor A 4514 Repair information 228 ...
Page 229: ...11 Disconnect the two springs D 4514 Repair information 229 ...
Page 246: ...3 Swing the right cover backward to remove 4 Remove the screw D 4514 Repair information 246 ...
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Page 255: ...Assembly 1 Covers 4514 Parts catalog 255 ...
Page 257: ...Assembly 2 Electronics 1 4514 Parts catalog 257 ...
Page 259: ...Assembly 3 Electronics 2 4 3 2 1 6 5 4514 Parts catalog 259 ...
Page 261: ...4514 Parts catalog 261 ...
Page 262: ...Assembly 4 Frame 4514 Parts catalog 262 ...
Page 264: ...4514 Parts catalog 264 ...
Page 265: ...Assembly 5 Option trays 3 4 5 6 1 2 4514 Parts catalog 265 ...
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Page 298: ...4514 Part number index 298 ...
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