Lexmark 4227 Service Manual - Page 66
Adjustments, Printhead installation adjustment, Printhead-to-platen gap adjustment
UPC - 734646117104
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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" 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. 4-2 Service Manual