Hi,
Try to make copies, one from DADF and one from the platen, How looks the copy? If the copy is good it looks like the upgrade is the issue.
Gabi
I have the latest MacBook Pro with Mojave 10.14.6., connected directly by ethernet cable to my Versalink C405. When I try and scan it appears to work normally but the resulting pdf file is undreadable. It worked fine just a few weeks ago so I am guessing it may be to do with 10.14.6 upgrade.
Can I fix it or should I updgrade to MacOS Catalina...or will that be worse?
I enclose a pic of a scrambled scan.
Scrambled Scan