Avision AD250F - Manual (Page 128)

User’s Manual
7-11
Assembling Procedure
1. Insert the left end of the upper ADF roller first to its slot and
place the ADF roller to its proper position.
2. Insert the left end of the lower ADF roller first to its slot and
place the ADF roller to its proper position.
Make sure the belt in the center of the lower ADF roller is
installed horizontally with the other rollers as indicated.