Bidirectional Print Adjustment - Lexmark 4227 - Forms Printer B/W Dot-matrix Service Manual

4227-300
Printhead-to-platen gap electronic setting
Be sure there is no paper in the printer.
1. Install a ribbon.
2. Hold down FormFeed and power on the printer.
3. Remove the ribbon guide.
4. Measure the printhead-to-platen gap. The gap specification is
between .011 inch (.275 mm) and .015 inch (.375 mm).
5. Use the Micro↑ or Micro↓ to change the printhead-to-platen
gap setting. The Micro↑ button increases the clearance and the
Micro↓ button decreases the clearance.
6. Install the ribbon guide.
7. Press Start/Stop to reset the new printhead-to-platen gap
setting.
8. Remove the ribbon guide and check the setting with a feeler
gauge.
9. Repeat steps 5 through 8 until the gap is within the
specification.
10. Press Store to save the setting in NVRAM.

Bidirectional print adjustment

Perform this adjustment whenever the main logic board, carrier, or
printhead is replaced.This test is in the User Menu and uses a line
length corresponding to the right margin setting. Run the test at both
the Draft speed setting and the Courier speed setting.
The following steps tell how to adjust the alignment of the print
wires, and assumes that macros are disabled.
1. Load continuous forms.
2. Press Menu.
3. Press Item ↓ until Print Adjust appears on the display.
4. Press Next → .
5. Press Item ↓ or Item ↑ to choose Draft or Courier. Draft prints
each alignment pattern once (unidirectional). Courier prints
each alignment pattern twice (bidirectional).
6. Press Start/Stop to print the alignment pattern.
Repair information
4-3