OKI ML321 Matrix Printer - 320uGB.pdf

Chapter 1 Printer Unpacking & Setup Choose a sturdy table, desk or printer stand to place your printer on when you remove it from the carton. Remove the styrofoam sides be sure to save all packing materials in case you need to ship the printer again and check the box for these contents: 1) 2) 3) 4) 5)

ML320/321 printer Paper separator Power cord Platen knob Ribbon cartridge

Note: Interface cable and paper are sold separately.

If any of these items is missing or damaged, see your dealer for a replacement.

ML 320/321 ( 96-02-01 )

Setup Preliminaries Preliminaries Don't plug the printer in until its set up and ready to operate. If there is clear protective film on the access cover, remove the film. Open the access cover and remove the shipping retainer (1). Be sure to save it with the other packing materials in case you ship the printer.

ML 320/321 ( 96-02-01 )

Install The Paper Separator and Platen Knob Install The Paper Separator and Platen Knob Open the rear cover of the printer (2). Holding the legs closed against the paper separator, place the tab on one side of the separator over the stud on the side of the rear cover (3). Pull gently on the other tab to slide it over the stud on the other side of the rear cover. Then close the rear cover. Insert the platen knob on the right side of the printer (4). Match the flatside of the knob to the flat side of the platen shaft.

ML 320/321 ( 96-02-01 )

Connect to Power and Computer Connect to Power and Computer Make sure the printer and computer are both OFF. Plug the power cord into the back of the printer(5). Plug the other end into a grounded outlet. Plug the interface cable into the parallel port on the back of your printer(6) Fasten the wire clips to the cable.

- Make sure the outlet is grounded. Do not use an adapter to defeat the grounding. - These instructions are for the standard parallel interface. If you have the optional serial interface, see the instructions provided with it. Interface cables are sold separately.

ML 320/321 ( 96-02-01 )

Install/Replace The Ribbon Cartridge Install/Replace The Ribbon Cartridge The printhead can get very hot during extended periods of printing be sure to let it cool off before you touch it. Be sure the power is off before you move the printhead. Open the access cover. Position the printhead between the bail rollers (7). Make sure the bail is closed (bail lever toward back of printer).

Install/Replace the Ribbon Cartridge ÎBe sure to use only ribbons specifically for MICROLINE 320/321 or MICROLINE 100 Series printers. Ribbon cartridges for ML390/391 printers look similar, but they will not fit in the ML320/321. For best result use genuine OKIDATA ribbons, part number 52102001. If you're replacing the ribbon cartridge, swing the front of the cartridge up off the printhead, then lift the cartridge out and discard it. Hold the new ribbon cartridge with the knob facing up and the flat end toward the front of the printer. Place the flat end into the ribbon plate(8) then lower the front of the cartridge over the printhead until it snaps into place (9). Turn the knob in the direction of the arrow to take up the slack in the ribbon.

ML 320/321 ( 96-02-01 )

Set the Headgap Set the Headgap The headgap lever (10) by the side of the cartridge adjusts for different paper thicknesses. Set it to: 1 for one- or two-part forms, 2 for three- or four-part forms, 3 for envelopes and extra-thick paper

ML 320/321 ( 96-02-01 )

Chapter 2 Loading Rear-Feed, Continuous Forms Loading Rear-Feed, Continuous Forms -

Do not position the left edge of the paper more than 1/2 from the end of the platen. The paper must cover the groove in the left side of the platen; if it doesnt, the printer will signal a paper out alarm. There are reference marks on the printer to show the recommended left edge position for the two most common paper sizes.

Make sure the paper lever is forward, and open the access cover and rear cover to expose the tractors (1). Pull the lock levers (2) forward and slide the left tractor into position for the paper size you're u