Lexmark 2390 003 - B/W Dot-matrix Printer Service Manual page 77

1. Turn the printer off.
2. Remove the ribbon access cover.
3. Remove the ribbon cartridge and paper.
4. Set the form thickness lever to position 1.
5. Move the carrier so that it is just to the left of the left upper feed
roller, approximately 50 mm (2.0 in.) from the left side frame.
6. Using feeler gauges [1] of 0.35 mm and 0.40 mm (0.014 in. and
0.016 in.), move the left carrier bushing [2] forward or backward
until the gap between the printhead [3] and platen [4] is between
0.35 mm - 0.40 mm (0.014 in. - 0.016 in.).
Note: The gap should be wide enough for the 0.35 mm (0.014 in.)
feeler gauge to slide in smoothly without catching, but too narrow to
insert the 0.40 mm (0.016 in.) feeler gauge.
Repair Information 4-3