IR Advance DX C3720i DADF-BA1 wavy scan

[configcrow]

A DADF-BA1 installed on an IR Advance DX C3720i produces wavy result in two areas: about 12 to 30 mm from the left and 178 to 210 mm on the right. It is more pronounced in the upper half of the page:
image_2023-08-28_005005157.jpg

Cleaning the feeder as instructed in Cleaning the Feeder did not help.
Would you please advise?

[GIUBOSS]

Re: IR Advance DX C3720i DADF-BA1 wavy scan

The rubber rollers are best rubbed with a cotton cloth moistened with kitchen degreaser, you have checked that the adf adheres perfectly to the rest of the machine and that there are no foreign bodies.