Lexmark 2390 003 - B/W Dot-matrix Printer Service Manual page 131

Notes On Replacement:
•
Take care not to break the two latches [6] on the side frame that
latch to the paper guide.
•
Be sure both ends of the paper separator are correctly in the
mounting holes.
•
Use the new slider cam, if one is included with the new side
frame; the old slider cam will not work properly although it may
seem to fit.
•
The hub side of all gears goes toward the side frame. While
installing the large idler gear, the slider should be in the outer
position. The conical side of the gear goes toward the side
frame. The lower feed roll gear may be a very tight fit.
•
238X-001 - Be sure the head gap sensor is in the correct
position while installing the paper feed motor plate.
Repair Information 4-57