Epson 836XL - Manual (Page 52)

Using Optional Equipment Page 52
Adjusting the Transparency Guide Angle
Most scanners scan at a slight angle due to the movement of
the carriage. If you find that your scanned images are being
scanned at a slight angle, adjust the angle of scanning by
turning the adjust pin.
The direction and degree you should turn the adjust pin
depends on your scanner and the placement of the document
to be scanned. You may want to experiment with it to
determine the best angle.
+0 . 2
+0 . 1
- 0 . 1
- 0 . 2
0