Page: 45Service Guide ML172/ML182 SeriesChapter 3 Printer Maintenance3.3.1 ADJUSTMENTS - Head Gap AdjustmentRequired Tools:Feeler Gauge (.019 inch)Phillips Screwdriver (#2)Jewelers ScrewdriverAdjustment Procedure:1. Turn the AC Power OFF and remove the AC plug from the power receptacle.2. Remove the printer access cover.3. Remove the ribbon cartridge.4. Set the gap adjusting lever to range #1.5. Move the paper lock release lever to the rear.6. Insert a 0.019 inch thickness gauge between the platen and the printhead. Make sure that thethickness gauge can be smoothly inserted, although a small amount of friction is acceptable.7. If adjustment of the gap is required, press down on the adjusting gear with a jewelers screwdriver todisengage the gear from the adjusting lever. Adjust the gap by turning the adjusting screw with ascrewdriver.8. After adjustment, move the adjusting lever from position 1 to 3 and then back to position 1. Recheckthe head gap once more. The gap must be between .017 inch and .019 inch.NOTE: Perform Steps 6, 7 and 8 at both ends of the platen.
