Scantron iNSIGHT 30 Operator's Manual page 112

Operator's Guide
8.
Align the new lower imaging guide in the guide track
and slowly push it in making sure that you can see the
solid black side of the patch.
9.
Reinstall and tighten the screw.
10.
Lower the scanner cover and press it down firmly
until it latches into place.
Chapter 4: Maintenance
Replacing the Imaging Guides
Patch
99