Lexmark OptraImage 443 Guide Rapide page 10

Correct SCSI
switch settings
8
SCSI cable
You received one SCSI cable with your OptraImage
purchase.The SCSI cable connects your scan unit and printer
to each other. Connect the SCSI cable in this step, but do
not turn the power on yet.
SCSI switch settings
Your scan unit contains dip switches that must be in the
correct position in order for the scan unit to work.
Make sure the SCSI switch settings on the back of the scan
unit are in the correct position
OptraImage Setup Guide