Lexmark C750 Service Manual page 188

5060-00x
Rollers
Component
description
Metering rolls
Color charge roll short
NIP shock
NIP distances
Y-C-M-K cartridge spacing
K to second transfer roll
M to second transfer roll
C to second transfer roll
Y to second transfer roll
Meter 1 to second transfer
Meter 2 to second transfer
Meter 3 to second transfer
Meter 4 to second transfer
Second transfer to fuser
Fuser nip to first redrive
Fuser nip to exit sensor
Fuser nip to exit tray nip
Printing the chart
The printer has an internal copy of the defect locator chart under the Help Menu. Verify the proper image size by
measuring any of the marks on the chart and comparing them to the corresponding measurement in the chart.
Use Step 2 if adjustments are needed.
Copying the chart
Use the provided transparent sheet if at all possible. If you need to make a copy, be aware that fax machines,
digital scanners, and xerographic copiers can distort images. Charts should be printed using the transparent
copy provided in the service manual. In order to maintain the accuracy of the edge rulers, the following steps
should be heeded when printing a copy of the Defect Location Chart.
1.
When printing this document, make sure "Fit to page" is not selected.
2.
Measure the distance between the Reference line and the 110 mm Calibration Mark to verify that it is
correct. If the distance is inaccurate, the bottom registration margin setting can be adjusted to correct the
discrepancy. Increasing the bottom margin value stretches the image, reducing it shrinks the image.
Original margin settings should be noted in the case that these changes adversely effect the print quality or
registration when printing normal documents.
3-4
Service Manual
Planes
Component
affected
Reference Edge All
C, M, or Y cart C, M and Y
Defect period
mm Inches
101.0 3.98
144.6 5.69
245.6 9.67
346.6 13.65
447.6 17.62
164.8 6.49
126.4 4.98
86.4 3.40
51.4 2.02
319.4 12.57
50.0 1.97
58.2 2.29
420.3 16.55
Defect period
mm inches
47.0 1.85
101.0 3.98