Lexmark 6500E Service Manual page 57

Black Level:
a
Load the printed test page facedown into the ADF.
b
From the Diagnostics menu, navigate to: Scanner Calibration > Copy Quick Test.
c
Inspect the black level calibration by assessing the toner saturation of the darkest square of the copy. The
objective of the black level calibration is to find the minimum numeric setting that provides the maximum toner
saturation of the darkest square. Too high of a setting will cause other dark squares to become fully black. Too
low of a setting will result in the darkest square not being as dark as possible.
d
Navigate to: Adjust Calibration Values > ADF Front Black. If the darkest square of the copy page does not appear
fully saturated, then increase the value. If several of the darkest squares look equally saturated, then decrease
the value. Select Submit to save your changes, reload the original test page, and repeat the Copy Quick Test.
Inspect the copy page again and repeat this step until the single darkest square is fully saturated, and none of
the other dark squares are as dark as the darkest square.
3
Adjust the ADF Back:
White Level:
a
Load the printed test page faceup into the ADF.
b
From the Diagnostics menu, navigate to: Scanner Calibration > Copy Quick Test.
c
Inspect the white level calibration by comparing the copy to the original test page. Ensure that the lightest visible
shaded squares of the original have similar lightness to the same lightest visible shaded squares in the copy. If
the original and copy pages match, then the white level calibration is correct and needs no adjustment.
Otherwise, navigate to: Adjust Calibration Values > ADF Back White.
Note: A small amount of background is normal and acceptable in the copy. Disregard the background when
comparing the lightness level between the original and the copy.
d
Adjust the values, and then touch Submit to save your changes. Increasing the value makes the white level
darker.
e
To check the changes, reload the original test page, and then repeat the Copy Quick Test. Repeat the steps as
needed until you are satisfied with the ADF back white level.
Black Level:
a
Load the printed test page faceup into the ADF.
b
From the Diagnostics menu, navigate to: Scanner Calibration > Copy Quick Test.
c
Inspect the black level calibration by assessing the toner saturation of the darkest square of the copy. The
objective of the black level calibration is to find the minimum numeric setting that provides the maximum toner
saturation of the darkest square. Too high of a setting will cause other dark squares to become fully black. Too
low of a setting will result in the darkest square not being as dark as possible.
d
Navigate to: Adjust Calibration Values > ADF Back Black. If the darkest square of the copy page does not appear
fully saturated, then increase the value. If several of the darkest squares look equally saturated, then decrease
the value. Select Submit to save your changes, reload the original test page, and repeat the Copy Quick Test.
Inspect the copy page again and repeat this step until the single darkest square is fully saturated, and none of
the other dark squares are as dark as the darkest square.
4
Adjust the Flatbed:
White Level:
a
Remove all pages from the ADF, then load the printed test page facedown onto the flatbed.
b
From the Diagnostics menu, navigate to: Scanner Calibration > Copy Quick Test.
Service menus
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