Adjustments; Printhead Installation Adjustment; Printhead-To-Platen Gap Adjustment - Lexmark 4227 - Forms Printer B/W Dot-matrix Service Manual

4227-300

Adjustments

Printhead installation adjustment

1. Hold the printhead down while pressing it toward the platen,
and tighten the two printhead mounting screws.
2. Perform the

Printhead-to-platen gap adjustment

Perform this adjustment:
•
When the platen, printhead, carrier, carrier shaft, or main logic
board is removed or replaced
•
When the print density varies across the page
There are two adjustments to this procedure.
Printhead-to-platen gap left and right
1. Turn the power off.
2. Remove the top cover.
3. Remove the ribbon.
4. Position the carrier to the left.
5. Using a .014 inch (.35 mm) feeler gauge as the Go gauge and a
.016 inch (.40 mm) feeler gauge as the No-Go gauge, rotate the
carrier shaft and measure the printhead-to-platen gap.
6. Position the carrier to the right.
7. Adjust the carrier shaft bearing on the right side frame so the
right gap matches the left gap.
4-2
Service Manual
"Printhead-to-platen gap adjustment" on page 4-2.