Copy Skew Correction Procedure - Lexmark MB790MFP Service Manual

Copy skew correction procedure

Note: This specification is used for copies from the flatbed, front ADF, and back ADF.
1. Check the paper squareness.
2. Make sure the guides in the paper tray are properly aligned.
3. Check the printer skew and registration.
4. Make sure the page is pushed to the top left corner of the flatbed.
5. Make sure the autodocument guides are snug against the page.
6. Plug printer into the power source and power on in Normal Printing Mode.
7. Measure CopyL1, CopyL2, CopyT1, CopyT2, CopyR1, CopyR2, CopyB1, and CopyB2 data points as
shown below.
CopyL1
CopyL2
8. Measure from the edge of the paper to the outer edge of the thick black line.
9. Determine the following calculations:
•
•
•
•
•
•
CopyT1
CopyB1
CopyL2-CopyL1 = ___
CopyR2-CopyR1 = ___
CopyT2-CopyT1 = ___
CopyB2-CopyB1 = ___
CopyT1-CopyB1 = ___
CopyL1-CopyR1 = ___
CopyT2
CopyR1
CopyR2
CopyB2
Diagnostic aids
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