Oki LP-1040 Maintenance Manual page 640

Check items and judging standard
(1) Subscanning direction grid chart's top and bottom edges: Eight positions
<Items to Check>
Image at sensor connection parts, 60 mm from the top and bottom edges of the original
<Check and Criteria>
Check that the horizontal lines are not disconnected at the sensor connection part.
Areas on the original marked by the ▲ symbol are guides designating CIS sensor
connections.
If a line disconnection part is found on one printout, the printout is negative.
When the line is completely connected with at least one of the three printouts, the
adjustment result is OK.
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