Lexmark 4I3 - Manual (Page 271)

Problem: Forms do not feed past print head
1: The Automatic Forms Thickness Adjustment (AFTA) setting
needs to be changed.
Solution: See the procedure for adjusting the forms thickness
setting through the operator panel (based on your forms device)
in Chapter 1, “Setting Up the 4230 Printer.”
2: The forms device is not properly installed.
Solution: Check the forms device installation (see Chapter 1,
“Setting Up the 4230 Printer”).
3: The ribbon is twisting or folding.
Solution: Replace the ribbon.
4: The forms device is defective.
Solution: See “Forms Device Inspection” on page B-35.
5: The ribbon shield is damaged.
Solution: Replace the ribbon.
Problem: Forms do not stack correctly
1: The forms do not stack correctly on the table behind the printer.
Solution: Use the recommended table (see IBM 4230 Printer
Planning and Site Preparation Guide).
Note: Up to 101.6 mm (4 in.) of forms may stack on the table
behind the printer without decreasing the ability of the forms to
stack correctly.
2: The forms do not stack correctly in the output rack on the table.
Solution: Check for obstructions to the paper path (cables,
cords, or other items). If you find an obstruction, remove or
relocate it.
3: The forms are specified incorrectly.
Appendix B. Problems B-41