ML5720/ML5721/ML5790/ML5791
PREFACE Every effort has been made to ensure that the information in this document is complete, accurate, and up-to-date. The manufacturer assumes no responsibility for the results of errors beyond its control. The manufacturer also cannot guarantee that changes in software and equipment made by other manufacturers and referred to in this guide will not affect the applicability of the information in it.
MANUFACTURER Oki Data Corporation, 4-11-22 Shibaura, Minato-ku, Tokyo 108-8551, Japan IMPORTER TO THE EU/AUTHORISED REPRESENTATIVE Oki Europe Limited (trading as OKI Printing Solutions) Blays House Wick Road Egham Surrey TW20 OHJ United Kingdom For all sales, support and general enquiries contact your local distributor.
CONTENTS Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Manufacturer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Importer to the EU/authorised representative. . . . . . . . . . . . . . . . . . . . .3 Environmental Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Menu setting. . . . . . . . . . . Menu items and settings Initialising menu settings Adjusting TOF position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41 .42 .57 .57 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . .
NOTES, CAUTIONS AND WARNINGS NOTE A note provides additional information to supplement the main text. CAUTION! A caution provides additional information which, if ignored, may result in equipment malfunction or damage. WARNING! A warning provides additional information which, if ignored, may result in a risk of personal injury.
INTRODUCTION Congratulations on purchasing this printer! This printer series is designed to provide highly reliable letter quality printing and high resolution graphics for the desktop/office printing environment. It combines state-of-theart, 18-pin (ML5720/ML5721) and 24-pin (ML5790/ML5791), serial impact dot matrix printing technology with advanced materials and superior construction to provide high performance and versatility in a desktop sized unit.
PRINTING PAGES The whole manual, individual pages, or sections may be printed. The procedure is: 1. From the toolbar, select File, then Print (or press the Ctrl + P keys). 2. Choose which pages you wish to print: (a) All pages, (1), for the entire manual. (b) Current page, (2), for the page at which you are looking. 1 2 3 (c) 3. Pages from and to, (3), for the range of pages you specify by entering their page numbers. Click on OK.
GETTING STARTED WARNING! If you have not already done so, familiarise yourself with the content of the Installation Safety booklet supplied with your printer. RETAINING PACKING MATERIALS After setting up your printer according to the instructions in the Set-up Guide, retain your packing materials and container in case you ever need to ship or transport your printer. IDENTIFYING COMPONENT PARTS The main parts of your printer are identified and briefly explained below.
INTERNAL VIEW 11 12 13 14 11. Paper Thickness Lever: set according to the thickness of the paper. 12. Ribbon Cartridge: holds the printer ribbon. 13. Print Head: prints the characters on the paper. 14. Pull-up Guide assembly: remove when using optional Pull tractor and optional Cutsheet feeder. REAR VIEW 18 19 17 16 15 20 15. USB connector: connect to USB interface cable. 16. Parallel connector: connect to parallel interface connector. 17.
LOCATING YOUR PRINTER > Select a firm, solid surface on which to site your printer. > Allow enough space around your printer (e.g. at least 60 cm from any wall) for easy access to the paper feed paths. >= > Make sure a grounded power outlet is available nearby. POWERING ON YOUR PRINTER WARNING! Operations of this equipment are not warranted when the equipment is connected to UPS (Uninterruptible Power Supply) and/or inverter. Doing so may result in damage of this equipment.
2. Connect the power cable connector (1) A/C Input (2) on the printer. 3b 3a 2 1 3. Connect the power cable to a 220/240 V AC (3a) power outlet and switch on the outlet power (3b). WARNING! Be careful when inserting a three-pronged AC plug. Before plugging it in, check the position of the FG terminal. Incorrect insertion may cause damage not only to the printer main body but also peripheral devices and electric shock, smoke and ignition. 4. Turn the printer Power Switch to ON. 5.
2. Switch off the outlet power (1a) and then unplug from the power outlet (1b). 1a 1b 3 2 3. Unplug the power cable connector (2) from the printer (3). PRODUCING A TEST PRINT To check that your printer is operational, produce a test print on a sheet of 80 gsm A4 paper (for example) as follows: CAUTION! 1. > Allow at least 5 seconds between turning the printer ON after turning it OFF. A shorter time interval between turning ON/OFF operations may cause printer power failure.
7. When the test print has completed, press the LOAD/EJECT button to eject the paper. NOTE If you want to abort the test print for any reason, press the SEL button followed by the LOAD/EJECT button to eject the paper and then turn the printer Power Switch to OFF.
CONNECTING TO A COMPUTER In this section you will interconnect your printer and computer, install the printer driver in your computer and print a test page. INTERCONNECTING PRINTER AND COMPUTER INTERFACES Your printer is equipped with two standard data interfaces: > Parallel: for direct connection to a PC. This port requires a bi-directional (IEEE 1284 compliant) parallel cable. > USB: for connection to a PC running Windows 2000 or above.
INTERCONNECTION 1. Ensure that both printer and computer are turned OFF. 2. Connect the required interface cable, USB (1) or parallel (2), or serial or network (3) to the printer and then to the computer. 3 2 1 NOTE With the Auto Interface connection enabled, you can also connect all the interfaces at the same time. 3. Turn ON the printer and then turn ON the computer. EMULATIONS The factory default emulation for your printer is IBM PPR.
PRINTING FROM A COMPUTER When printing to your printer from, for example, a Windows application on your computer, make your printing selections from the driver windows that appear on screen. These driver windows have been designed to be easy to use and intuitive while supplementary on-line help is available by clicking each window Help button. OKI DIPUS The OKI DIPUS utility allows you remote access to the printer settings using the available applications.
PAPER HANDLING This section describes how to use cut sheet paper and continuous forms in your printer. LOADING CONTINUOUS FORMS Setting up continuous forms 1. To avoid paper feeding problems, carry out the following:Check your printer is on a surface approximately 75 cm above the floor. 2. Position the continuous forms supply directly below the printer, no more than 3 cm left or right of the printer paper path. 3.
Front feed (Push) 60 cm 75 cm 3 cm FEEDING CONTINUOUS FORMS REAR FEED (PUSH) 1. Ensure that the printer is turned ON. NOTE If there is a cut sheet in the printer, eject it as described in “Ejecting cut sheet paper” on page 30. 2. Ensure the Paper Type Lever is set to Continuous Forms “REAR”. 3. Open the Top Cover and adjust the Paper Thickness Lever to suit the paper. See “Setting the Paper Thickness lever” on page 33. REAR After adjusting, close the Top Cover.
5. Lift the locking lever (1) of the right Pin Tractor and slide the Pin Tractor as required to adjust the paper position relative to the first horizontal character centre mark. 1 3 2 Press the locking lever back down to lock the Pin Tractor in the desired position. 6. Lift the locking lever (2) of the left Pin Tractor and slide the Pin Tractor to the required position to accommodate the width of the continuous forms to be used.
Tractors. Press the locking lever down to lock the right Pin Tractor in the desired position. 9. Lower the top paper tray and slide it towards the front of the printer until the marks align. 10. Press the LOAD/EJECT button. The continuous forms will be taken into the printer and positioned at the first line print position and the SEL indicator will illuminate. NOTE > Raise the top paper tray if the paper does not feed properly when the rear tractor is used.
4. Push the tabs in the arrow direction and then pull the Pin Tractor in your direction to release it. FRONT FEED (PUSH) NOTE If there is a cut sheet in the printer, eject it as described in “Ejecting cut sheet paper” on page 30. Moving the tractor assembly 1. Ensure that the printer is turned OFF. 2. Disconnect the power cord. 3. Open the Top Cover. WARNING! Be careful as the print head may be hot after operation. Allow it to cool before touching it.
4. Remove the Pull-up Guide assembly support. 5. Remove the top tray by holding the tray by the tabs on both sides and pulling it up. 6. Turn the printer, so that the back of the printer is facing you. 7. Remove the tractor assembly. See “Dismounting the rear pin tractor” on page 21. 8. Turn the printer, so that the front is facing you. 9. Replace the top paper tray by aligning the arrows and then pushing it down.
10. Close the Top Cover. 11. Open and remove the front cover (1). 1 NOTE If front cover is already open and the front cut sheet paper tray has been installed, gently lift the tray from the bottom and remove it, and then remove the front cover. 12. Holding by the tabs, guide the tractor into the side frames and push it downwards to lock it in place. Loading continuous form (front) 1. Ensure that the printer is turned ON. 2. Ensure that the Paper Type Lever is set to Continuous form “FRONT” 3.
6. Open the left and right Pin Tractor covers and feed the continuous forms in the direction of the arrow, locating the sprocket holes in the forms onto the sprocket pins. NOTE Ensure that paper is fed straight into the printer to avoid the possibility of skew printing, irregular line feeding and paper jam. 7. Ensure that the forms are properly aligned on the sprocket pins, then close the Pin Tractor covers. 8.
3. Push the tabs in the arrow direction and then pull the Pin Tractor in your direction to release it. TEARING OFF CONTINUOUS FORMS 1. With the SEL indicator illuminated, press the TEAR button to feed the continuous forms to the tear-off position. 2. Carefully tear off the forms along the tear-off perforations in the direction shown. Using excessive force may result in tearing at a position other than the tear-off perforations. 3.
REMOVING CONTINUOUS FORMS 1. Tear off the continuous forms. See “Tearing off continuous forms” on page 26. 2. Press the LOAD/EJECT button to move the front edge of the continuous forms backwards to the Pin Tractors. NOTE > The printer switches to off line mode. > The ALARM indicator illuminates to indicate there is no paper present. > If sprocket holes of the last page of the forms disengage from the sprocket pins, do not attempt to eject the paper to avoid the possibility of a paper jam. 3.
LOADING CUT SHEET PAPER 1. Ensure that the printer is turned ON. NOTE If there are any continuous forms in the printer, eject them as described in “Removing continuous forms” on page 27. 2. Ensure that the Pin Tractor covers (1) are closed to avoid the possibility of paper jams. 3. Ensure the Paper Type Lever is set to Cut Sheet. 4. To load the cut sheet in the Top Feed Paper Tray, raise the top tray.
5. Set the left margin of the paper by adjusting the Paper Guide (1) along the scale (2) relative to the start of printed line marker arrow. 1 2 1 2 Top Feed 6. Front Feed Open the Top Cover and Adjust the Paper Thickness Lever to suit the paper. See “Setting the Paper Thickness lever” on page 33. NOTE If the Paper Thickness Lever setting does not match the paper being used, paper feeding and printing may not work properly. 7.
EJECTING CUT SHEET PAPER When the printer reaches the end of the cut sheet page it automatically ejects the page. If required, add another sheet for the printer to continue printing from where it left off. To eject a cut sheet left in the printer, carry out the following: 1. Press the SEL button to put the printer off-line. 2. Press the LOAD/EJECT button and the paper is ejected to the Paper Tray. NOTE Paper longer than A4 length (297 mm) may overlap and possibly fall off the Paper Tray.
LOADING THE OPTIONAL CUT-SHEET FEEDER NOTE For installation instructions, see “Installing the Cut-sheet feeder” on page 73. 4 3 2 1 5 6 1. Paper Set Lever 2. Right Paper Guide 3. Front Sheet Support 4. Rear Sheet support 5. Left Paper Guide 6. Locking Lever 1. Ensure the Paper Type Lever is set to Cut Sheet. 2. Open the Top Cover and adjust the Paper Thickness Lever to suit the paper. See “Setting the Paper Thickness lever” on page 33. 3. Remove the front sheet support (3). 4.
11. Push both paper guide locking levers (6) upward into the locked position. 12. Push the paper set lever gently backward into the SET position. CAUTION! Ensure that the paper set lever is closed (towards the SET position) before printing with the CSF. If it is left open, the friction rollers will not be able to feed the paper, and the printer will print on the platen and may damage the printhead and platen. 13. Attach the front sheet support (3).
7. Feed the paper over the roller on the stand. 8. Set the paper onto the platen from the top of the tension bar. 9. Rotate the platen knob until the top edge of the paper reaches the roll paper, and then set the Paper Type Lever to PULL to easily adjust the paper position. 10. Align the paper so that the exit and entry paper edges align. 11. Reset the Paper Type Lever to RPS. 12. Move the paper guide and adjust it to the width of the paper. 13.
LEVER POSITION PAPER TYPE 1 2 3 4 5 6 7 8 9 3 part REMARKS See below Carbon paper or Pressure- sensitive paper (40 gsm) 2 part 10 X X 4 part X 5 part X 6 part X 7 part X Set the Paper Thickness lever for overall paper thickness as follows: OVERALL PAPER THICKNESS LEVER POSITION 0.06 - 0.10 mm 1 0.11 - 0.15 mm 2 0.16 - 0.20 mm 3 0.21 - 0.25 mm 4 0.26 - 0.30 mm 5 0.31 - 0.35 mm 6 0.36 - 0.40 mm 7 0.41 - 0.45 mm 8 0.46 - 0.50 mm 9 0.51 - 0.
NOTE > When using 3-inch wide media, change the Centering Position in the Menu Settings to Mode 1. If the Centering Position is not set to 1, it will result in Paper Jam. > When loading envelopes, set the head gap based on the thickness of the overlapped and glued areas of the envelope and not the thin area. This will prevent dark printing in some areas on the envelope. > Do not use glossy paper if it is not tested thoroughly. This type of paper is left with marks from the paper feed roller or from rubbing.
OPERATING INSTRUCTIONS OPERATOR PANEL The status/alarm indicators and button switches on the operator panel allow you to check printer status and control the printer. You can also use OKI DIPUS utilities to check printer status and control the printer from your computer, see “OKI DIPUS” on page 17.
INDICATORS INDICATORS COLOUR STATUS MEANING SEL Green ON Printer is on-line i.e. is available to print. OFF Printer is off-line i.e. is not available to print. FLASHING When flashing together with the ALARM indicator, printing cannot be resumed at this stage. Turn the power OFF, verify that the carriage moves properly, then turn the power ON again. If the problem is still there after you turn the power ON again, contact your dealer.
INDICATORS COLOUR STATUS MEANING CHR.PITCH Green ON With TEAR indicator ON: LED 1 Printer is in MENU setting mode. ON With Alarm indicator flashing: 1 2 > > > LED 2 LED 1 LED 1 and 2 ON > > > > > > Indicates paper loading jam. Indicates paper park/eject jam. Indicates incorrect media setting. Without Alarm indicator flashing: LED 2 LED 1 LED 1 and 2 > > > Indicates 10CPI is selected. Indicates 12CPI is selected. Indicates 15CPI is selected.
BUTTON FUNCTIONS The button functions described here are as in Print mode. SWITCH STATUS FUNCTION SEL On-line Sets the printer to off-line. Off-line Sets the printer to on-line. On-line/Off-line Feeds paper by one line. LF/FF When pressed for more than 500ms, performs form feed. LOAD/EJECT On-line/Off-line When no paper is loaded Performs paper feed. When paper is loaded: TEAR Continuous forms Retracts the form to the Pin Tractor. Cut-sheet paper Ejects the cut sheet.
SWITCH TEAR + LF/FF PRINT QUALITY + SEL PRINT QUALITY + LF/ FF CHR.PITCH + PRINT SPEED STATUS FUNCTION On-line/Off-line ML5720/ML5721 Performs microfeed (reverse) 1/144 inch when paper is in tear off position. ML5790/ML5791 Performs microfeed (reverse) 1/180 inch when paper is in tear off position. On-line/Off-line ML5720/ML5721 Performs microfeed (reverse) 1/144 inch when paper is in Top of Form position.
MENU SETTING NOTE Before changing menu settings, you may wish to print the current menu settings as in “Confirming current settings” on page 40. 1. Ensure that the printer is turned ON. 2. Place the cut sheet on the Paper Tray, the paper is gripped by the printer. 3. Press and hold down the CHR PITCH button and then the PRINT SPEED button to enter menu mode, Menu PRINT? is printed. 4. Press the LF/FF (GROUP) or LOAD/EJECT (ITEM) or TEAR (SET) button to print the first menu item. 5.
MENU ITEMS AND SETTINGS In the menu settings tables below, factory default settings are shown in bold. GROUP ITEM FUNCTION SETS ML5720/ML5721 ML5790/ML5791 Printer Control Emulation Mode Select emulation mode. IBM PPR, EPSON FX, ML EPSON LQ, IBM PPR, IBM AGM Font Print Mode Select quality of ANK characters. Draft NLQ Courier NLQ Gothic NLQ OCR-B HSD SSD LQ Courier LQ Roman LQ Swiss LQ Swiss Bold LQ Orator LQ Gothic LQ Prestige LQ OCR- A LQ OCR- B DRAFT HSD Draft mode Select the draft mode.
GROUP Symbol Sets ITEM FUNCTION SETS ML5720/ML5721 ML5790/ML5791 Character Set Select character code table. Set I Set II Standard (ML mode only) Line Graphics (ML mode only) Block Graphics (ML mode only) Set I Set II Language Set Select a language character set.
GROUP Symbol Sets cont.
GROUP ITEM FUNCTION SETS ML5720/ML5721 Rear Feed (Push) ML5790/ML5791 Line Spacing Select line feed pitch. 6 LPI 8LPI Form Tear-Off When printer is idle (0.5, 1.0 or 2.0 sec), paper is advanced from the current print position to the tear position. When data is received, paper is moved to its original printing position. Manual 0.5 sec 1.0 sec 2.0 sec Skip Over Perforation Select whether to skip over perforation or not.
GROUP ITEM FUNCTION SETS ML5720/ML5721 Rear Feed (Push) cont. Continuous Paper Top of Form Select an adjustment value for the reference position in regard to the Top of Form of a continuous form. 2.12 mm (1/12”) 4.23 mm (2/12”) 6.35 mm (3/12”) 8.47 mm (4/12”) 10.58 mm (5/12”) 12.70 mm (6/12”) 14.82 mm (7/12”) 16.93 mm (8/12”) 19.05 mm (9/12”) 21.17 mm (10/12”) 23.28 mm (11/12”) 25.40 mm (12/12”) 27.52 mm (13/12”) User Top of Form LF Revise Adjust the line feed amount.
GROUP ITEM FUNCTION SETS ML5720/ML5721 Front Feed (Push) cont. ML5790/ML5791 Page Length Select the length of a continuous form. 279.4 mm (11”) 296.3 mm (11 2/3”) 304.8 mm (12”) 355.6 mm (14”) 431.8 mm (17”) 76.2 mm (3”) 82.6 mm (3.25”) 84.7 mm (10/3”) 88.9 mm (3.5”) 93.1 mm (11/3”) 101.6 mm (4”) 127.0 mm (5”) 139.7 mm (5.5”) 152.4 mm (6”) 177.8 mm (7”) 203.2 mm (8”) 215.9 mm (8.5”) Initial Position Select the vertical print position when printer is turned on.
GROUP ITEM FUNCTION SETS ML5720/ML5721 Pull Line Spacing Select line feed pitch. 6 LPI 8 LPI Skip Over Perforation Select whether to skip over perforation or not. (When a skip over perforation command is received, the received command is given priority.) No 25.4 mm (1”) Page width (Displayed only for ML5721/ML5791) Change to 8” to print on narrow paper. 345.44 mm (13.6”) 203.2 mm (8”) Page Length Select the length of a continuous form. 279.4 mm (11”) 296.3 mm (11 2/3”) 304.8 mm (12”) 355.
GROUP ITEM FUNCTION SETS ML5720/ML5721 Cut Sheet Top cont. Page Length Select the page length of cut sheet. 279.4 mm (11” in) 296.3 mm (11 2/3”) 304.8 mm (12”) 420.9 mm (16.57”) 355.6 mm (14”) 76.2 mm (3”) 82.6 mm (3.25”) 84.7 mm (10/3”) 88.9 mm (3.5”) 93.1 mm (11/3”) 101.6 mm (4”) 127.0 mm (5”) 139.7 mm (5.5”) 152.4 mm (6”) 177.8 mm (7”) 203.2 mm (8”) 215.9 mm (8.5”) Initial Position (Displayed when connected to the RPS)(ML5720/ ML5790) Select the vertical print position when printer is turned on.
GROUP ITEM FUNCTION SETS ML5720/ML5721 Cut Sheet Top cont. Cut Sheet Top of Form Select the reference position for the TOF position when feeding cut sheet. (Up to the mid-section of characters in the first line.) 2.12 mm (1/12”) 4.23 mm (2/12”) 6.35 mm (3/12”) 8.47 mm (4/12”) 10.58 mm (5/12”) 12.70 mm (6/12”) 14.82 mm (7/12”) 16.93 mm (8/12”) 19.05 mm (9/12”) 21.17 mm (10/12”) 23.28 mm (11/12”) 25.40 mm (12/12”) 27.52 mm (13/12”) User Top of Form LF Revise Adjust a line feed in the cut sheet mode.
GROUP ITEM FUNCTION SETS ML5720/ML5721 Cut Sheet Front cont. Cut Sheet Auto Eject Position Select a printable area at the bottom of cut sheet paper in cut sheet mode (the character centre position). 6.35 mm (3/12”) 12.70 mm (6/12”) 14.82 mm (7/12”) Invalid TOF Adjust Select an adjustment value for the reference position in regard to the TOF position of cut sheet paper.
GROUP Set-up cont. ITEM FUNCTION SETS ML5720/ML5721 ML5790/ML5791 - Paper End Detection Select whether to detect paper end or not. Change to OFF to override the sensor and print closer to the bottom of the page. On Off Print Registration 1 Adjust the print starting position on printing in the reverse direction. (The position moves to the right or left in 1/720 in increments.) -10 ~ -1 0 +10 ~ +1 Print Registration 2 Adjust the print starting position on printing in the reverse direction.
GROUP Set-up cont. ITEM FUNCTION SETS ML5720/ML5721 ML5790/ML5791 - Print DEL Code (Displayed only for ML Emulation) Change the setting to Yes to print the DEL code (decimal 27) as a solid box. No Yes SI Select Pitch (10 CPI) (Displayed only for IBM emulation) Select how to handle an SI command received in 10 CPI mode. 17.1 CPI 15 CPI SI Select Pitch (12 CPI) (Displayed only for IBM emulation) Select how to handle an SI command received in 12 CPI mode.
GROUP ITEM FUNCTION SETS ML5720/ML5721 Set-up cont. Parallel I/F Serial I/F (Displayed when connected to Serial Interface) ML5790/ML5791 Print Direction at DH Mode Select the print direction at the double height printed. Uni-directional Bi-directional Sleep Mode Set whether to enable or disable sleep mode. Enable Disable Sleep Time Set idle time to enter sleep mode. 5 min 10 min 15 min 30 min 60 min Pin Control Select whether to have or not have print control during line printing.
GROUP ITEM FUNCTION SETS ML5720/ML5721 Diagnostic Test Select to perform input/ output diagnosis of RS-232C interface signals. No Yes Busy Line Select to set the Busy Line. SSDSSD+ DTR RTS Baud Rate Select to set the Baud Rate. 9,600 bps 4,800 bps 2,400 bps 1,200 bps 600 bps 300 bps 19,200 bps DSR Signal Select the DSR Signal. Valid Invalid DTR Signal Select a method to switch a DTR signal of a serial interface.
GROUP ITEM FUNCTION SETS ML5720/ML5721 CSF Bin 1 cont. TOF Adjust (Displayed when Single-bin Cut-sheet feeder is installed) Select an adjustment value for the reference position in regard to the TOF position of cut sheet paper. -20 ~ -1 0 +1 ~ +20 The position moves to the rear of the form by (+) and to the top of the form by (-) in 1/60 in increments. Cut Sheet Top Of Form Select the reference position for the TOF position when feeding cut sheet.
INITIALISING MENU SETTINGS To restore the menu settings to their initial values, carry out the steps below. NOTE The values adjusted by the Adjustment menus are not initialised by the following procedure. 1. Set the Power Switch to OFF. 2. Press and hold down the SEL and LF/FF buttons together and then set the Power Switch to ON. The SEL LED will flash. 3. Press and hold down the TEAR button and then press the SEL button again.
> To feed the paper backward by a small amount (1/180 in), press the LOAD/EJECT and LF/FF buttons together. NOTE > Press the TEAR button to move the continuous form down before adjusting the TOF. ± 20/144 in For ML5790/ML5791: the specified correction range is ± 30/180 in. > For ML5720/ML5721: the specified correction range is > 7. When the paper is positioned at the required TOF, release the buttons in Step 6 above.
TROUBLESHOOTING CLEARING PAPER JAMS CUT SHEET PAPER JAMMED IN PRINTER WARNING! Do not carry out any operations inside the printer with the Power Switch set to ON. 1. Set the Power Switch to OFF. 2. Open the Top Cover. 3. Set the Paper Thickness lever to position 10. WARNING! The Print Head may be hot after printing. Allow it to cool before touching it. 4. Remove the ribbon cartridge. See “Changing a ribbon cartridge” on page 68. 5. Move the print head away from the paper.
6. Rotate the platen knob in the relevant direction and pull the cut sheet out from the top of the printer. 7. If a paper fragment remains inside the printer: (a) use tweezers to grip and extract it or (b) insert a triple folded sheet from the Paper Tray and turn the platen knob to pass the folded sheet through and push out the paper fragment. 8. When the paper jams are cleared, replace the ribbon cartridge, reset the paper thickness lever and close the printer top cover. 9.
4. Remove the top Paper Tray by holding the tray by the tabs on both sides and pulling it up from the printer. 5. Raise each Pin Tractor cover and remove the continuous forms from the Pin Tractors. 6. Rotate the platen knob and remove the forms from the front of the printer. 7. If a form fragment remains inside the printer, place two or three forms in a stack on the Pin Tractors and turn the platen knob to push the fragment out of the printer. 8.
10. Set the Power Switch to ON. NOTE Use the above procedure to clear paper jam when using continuous formfront push. RESPONDING TO ALARM CONDITIONS Use the following table for guidance on how to respond to indicated alarm conditions. INDICATOR ALARM MEANINGS AND ACTIONS SEL ALARM OFF ON Paper has run out. Add paper and press the SEL button. OFF Flashing The Paper Type lever is wrongly set for the type of paper in use. Press the SEL button and set the Paper Type lever to the correct position.
PROBLEM CAUSE ACTION The start position may change after the printer is powered on. When the printer is powered ON, switch from off-line mode to on-line mode by pressing the SEL button. Reset the start position. You must set the Power Switch to OFF before you change the start position. When the print head overheats, the printer automatically starts unidirectional split printing. When the print head temperature drops sufficiently, the printer will return to its original operation.
PROBLEM CAUSE ACTION Too high or too low TOF (where printing starts). The TOF is not correctly selected. Initialise the printer. Select correct TOF for cut sheet and continuous forms. Select the first-line print position and adjust the paper top position. Reselect the margin correctly in the application. Too large or small left and/or right margins. The left or right margin is not correctly selected. Incorrect positions of the Paper Guide or Pin Tractors.
PROBLEM CAUSE ACTION Sheets are located off the paper guide. Load sheets with their left edges against the paper guide. Sheets are not loaded to the end. Load sheets to the end. Continuous forms instead of cut sheets are fed. The printer is in the continuous forms mode. Eject the continuous forms and select cut sheet mode for the printer. Paper distortion. Sheets are not loaded to the end, or they are not inserted straight. Load sheets to the end. Paper with wrinkles, folds or other defects.
PROBLEM CAUSE ACTION Paper feed operations for both cut sheets and continuous forms are actuated. The cut sheet is not ejected. Eject the cut sheet.
CLEANING YOUR PRINTER To keep your printer in good operating condition, you are advised to clean it regularly. WARNING! Set the printer Power Switch to OFF and disconnect the power cable from the printer before cleaning the printer. PRINTER EXTERIOR CAUTION! Keep the Top Cover closed to avoid the possibility of detergent entering the printer Clean the exterior of the printer as required, but at least every six months or 300 hours of operation, whichever comes first.
CONSUMABLES AND ACCESSORIES CONSUMABLES When the printed image becomes faint or incomplete, replace the ribbon cartridge. CHANGING A RIBBON CARTRIDGE CAUTION! Only use genuine Original consumables to ensure the best quality and performance from your hardware. Non Original products may damage your printer’s performance and invalidate your warranty. WARNING! Do not change the ribbon cartridge with the Power Switch set to ON. 1. Set the Power Switch to OFF. 2.
4. Holding the sides of the ribbon guide, slope it up and out to remove it from the carriage. 5. Holding the ribbon cartridge close to both ends, slope it up and out until it unlocks then remove it along the direction indicated by the arrows. 6. Dispose of the cartridge in accordance with your local guidelines.
7. Remove the new ribbon cartridge from its wrapping and note the position of the Ribbon Guide (1), Knob (2) and Pin (3). 2 1 3 8. In the direction indicated by the arrows, insert the pins at both ends of the ribbon cartridge (1) into the U grooves (2) in the printer until the ribbon cartridge is fully locked. 2 1 2 NOTE It may be easier to mount the ribbon cartridge in place if you align it with the topside of the grooves.
9. Holding the sides of the ribbon guide slope it downward until the ribbon guide comes in line with the slot of the print head. NOTE Ensure that the guide is pushed to the end of the print head. 10. Move the print head horizontally to ensure that the ribbon is properly installed. 11. Turn the knob (1) clockwise (in the direction of the arrow) to wind up the ribbon. 1 CAUTION! > Do not turn the knob anticlockwise as the ribbon might jam.
12. Set the Paper Thickness lever to match the paper being used. (See “Setting the Paper Thickness lever” on page 33.) 13. Close the Top Cover. 14. Set the printer Power Switch to ON. CONSUMABLE ORDER INFORMATION ITEM MODEL LIFE Ribbon cartridge (Black) ML5720/ML5790 8 million characters 44173405 ML5721/ML5791 13 million characters 44173406 Consumables and accessories > 72 ORDER NO.
INSTALLING OPTIONS INSTALLING THE CUT-SHEET FEEDER To install the optional cut-sheet feeder (CSF) carry out for the following: 1. Ensure that the printer is turned OFF. 2. Ensure that the Paper Type Lever is set to Cut-Sheet. RPS REAR FRONT PULL 3. Open the top access cover, adjust the Paper Thickness Lever to suit the paper. See “Setting the Paper Thickness lever” on page 33. 4. Remove the top tray by holding the tabs (1) on both sides and pulling it up away from the printer.
5. Remove the Pull-up Guide assembly (1) by disengaging the latches (2) on both sides, pulling it forwards (3) and then pulling it up (4). 2 1 4 3 6. Guide the edge of Cut-sheet feeder on both sides onto the platen and then press down to lock it in place. 7. Plug in the CSF connector into the CSF port in the rear of printer.
8. Set the printer Power switch to ON. NOTE The Guide Assembly packed with CSF cannot be used on ML5720/ML5721. INSTALLING THE ROLL PAPER STAND (ML5720/ML5790) To install the optional Roll Paper Stand (RPS), carry out the following: 1. Ensure that the printer is turned OFF. 2. Ensure that the Paper Type Lever is set to RPS. RPS REAR FRONT PULL 3. Remove the Pull-up Guide assembly support.
4. Remove the top tray by holding the tray by the tabs on both sides and pulling it up from the printer. 5. Install the separator (1). Insert the RPS (2) into the separators insertion slots (3) and push it backward (4). 2 4 1 3 6. Plug in the RPS connector into the port in the rear of the printer.
INSTALLING THE NETWORK AND SERIAL INTERFACE CARD To install any of the above options, follow the detailed installation sheet that accompanies the option.
SPECIFICATIONS MODEL MODEL NUMBER ML5720 D22540B ML5721 D22550B ML5790 D22560B ML5791 D22570B ITEM SPECIFICATION Print method Impact dot matrix Print head ML5720/ML5721 18 pin, 0.3mm (0.012 in) diameter ML5790/ML5791 24 pin, 0.2mm (0.0079 in) diameter Dimensions ML5720/ML5790 438mm(W) x 375mm(D) x 191mm(H) ML5721/ML5791 592mm(W) x 375mm(D) x 191mm(H) (with platen knob, pull-up guide assembly support and paper separator) Weight ML5720/ML5790 7.
INDEX A alarm indications ................... 62 aligning perforations ............. 26 C changing paper paths continuous forms to cut sheet .............................. 30 cut sheet to continuous forms .............................. 30 cleaning exterior ............................. 67 interior .............................. 67 continuous forms front feed .......................... 22 rear feed ........................... 19 controlling the printer using DIPUS .................................
OKI PRINTING SOLUTIONS CONTACT DETAILS Oki Systems (UK) Limited 550 Dundee Road Slough Trading Estate Slough, SL1 4LE Tel:44 (0) 1753 819819 Fax:44 (0) 1753 819899 http://www.oki.co.uk Oki Systems Ireland Limited The Square Industrial Complex Tallaght, Dublin 24, Ireland Tel:+353 1 4049590 Fax:+353 1 4049591 http://www.oki.ie OKI Systems - Northern Ireland 40 Sydenham Park Belfast, BT4 1PW Tel:+44 (0)28 90 20 1110 http://www.oki.
