Lexmark 4227-X00 - Manual (Page 65)

4-2 Service Manual
4227-X00
Adjustments
Printhead Installation Adjustment
1. Hold the printhead down while pressing it toward the platen and
tighten the two printhead mounting screws.
2. Check the “Printhead-to-Platen Gap Adjustment” on page 4-2 .
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.