Epson LQ-670 User Manual page 56

3. Release the sprocket lock levers by pushing them up.
4. Facing the back of the printer, position the left sprocket unit so
that the sprocket pins are to the left of the "0" on the scale and
the arrow mark on the printer. Then push down the lock lever
to lock the sprocket in place.
Note:
Printing starts at the arrow mark on the printer and the "0" mark
on the scale. The unprintable area is to the left of the arrow mark
and the "0".
3-12
Paper Handling
arrow mark
scale