Lexmark C752 Service Manual page 270

5060-2XX
11.
Print the Printhead Mechanical Alignment Test page to determine the printhead alignment. See Figure 6 for
example.
Note: To see a printhead mechanical alignment test in color page, see
page" on page
12.
Loosen the printhead screws before making any adjustments to the thumbwheel.
13.
Turn each thumbwheel the appropriate number of clicks as indicated by the test page. For example, if the
test page indicates a +10 as the misalignment, turn the thumbwheel 10 clicks in the positive direction
indicated on the test page. Do this for both the front and rear printhead.
14.
Bias the printhead up against both thumbwheels, and hold in place when tightening printhead mounting
screws.
15.
Tighten the right rear printhead mounting screw. Then tighten the front screw followed by the left rear
screw. Make sure the printhead is biased against the thumbwheels when tightening the screws.
16.
Print another Printhead Mechanical Alignment Test Page to verify printhead alignment.
17.
If the printhead alignment is within ±5 for both front and rear positions, then proceed to electronic
alignment procedure. If not, repeat steps 12 through 16, until alignment is within ±5.
Note: When replacing the black printhead there is no Z value to reset. After the black printhead is mechanically
aligned to the magenta printhead, it is necessary to electronically align the three color printheads to the new
black printhead.
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Service Manual
B-9.
"Printhead mechanical alignment test