Adjusting Skew - Lexmark MB790MFP Service Manual

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Adjusting skew

For flatbed scanner and ADF skew adjustment, refer to the examples below to identify if "negative" or "positive"
skew is present; this will help with determining the correct adjustment to be made.
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Acceptable ADF and flatbed scanner specifications
Scan
Flatbed (LE, TE, left & right edges) = +/- 0.5% (or +/- 0.005mm/mm)
ADF simplex and duplex (LE, TE, left & right edges) = +/- 0.75%
Copy
Flatbed, ADF simplex and duplex (LE, TE, left & right edges) = +/- 0.75%
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Diagnostic aids