Reinstall the printhead clamp and swing it back over to lock the printhead in place. Replace the printhead, making sure that the circuit board at the bottom of the printhead family engages the slot (1) in the carriage.ĬAUTION: Be sure the printhead is fully inserted before proceeding. Turn the printhead plate around and reinsert it on the other side of the carriage assembly (1). Lift the printhead plate off the carriage assembly (1). Swing up the printhead clamp, then remove it by pushing forward (toward the platen) and to the left. Move the printhead to the center of the platen. Remove the access cover and the pull-up roller assembly. To disengage the expanded printhead gap, reverse the following steps. If you try to print on single sheets without adjusting the printhead gap, you can damage the printhead and void your warranty. It also increases the impact strength of the pins in the printhead.ĬAUTION! Once the expanded printhead gap is engaged, you cannot print on single sheets without changing the gap back. This expands the head gap settings for extra-thick forms and heavy card stock. To print on extra-thick multi-part forms, you engage the expanded printhead gap feature. Extra-thick multi-part forms range from 0.017-inch (0.43 mm) to a maximum of 0.03 inch (0.79 mm). ML420 9 pin Dot Matrix printer will handle the most demanding print environments: point-of-sale, automation and utility applications such as wholesale or retail sales counters, financial departments, and manufacturing or warehouse sites.Your printer can be used for dedicated bottom-feed printing on extra-thick multi-part forms. Print Quality Important! What are the applications for okidata ml420 impact printer? 3-part form (with carbon) 4-part form (with carbon) Envelopes or extra thick paper Note: When the head gap is set to 2, 3, 4 or 5, the printer automatically slows down for better print quality with multipart forms. Microline 420/421 User’s Guide 4 Move the paper lever to the appropriate position. Hold the SHIFT button down and press the SEL button once. Ensures all forms begin printing in the correct spot. The top of the paper should be at the red line near the printer head. Press and hold the SHIFT and LF buttons until the paper stops moving. How to set up an okidata 320 turbo printer? The OKI MICROLINE 420 9-pin printer and its wide-carriage counterpart ML421 are a quantum leap forward in Impact printer performance. The Okidata Microline 420 is designed for commanding performance in demanding environments. Frequently Asked Questions What kind of printer is okidata microline 420?

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