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Oki Operation 790 Handbook

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MICROLINE
790/791
Printer Handbook

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  • Page 1 MICROLINE 790/791 Printer Handbook...
  • Page 2 Every effort has been made to ensure that the information in this document is com- plete, accurate and up-to-date. OKI assumes no responsibility for the results of errors beyond its control. OKI also cannot guarantee that changes in software and equip- ment made by other manufacturers, and referred to in this handbook, will not affect the applicability of the information in this manual.

  • Page 3: Important Safety Instructions

    Important Safety Instructions Your OKI printer has been carefully designed to give you years of safe, reliable per- formance. As with all electrical equipment, however, there are a few basic precautions you should take to avoid hurting yourself or damaging the unit: •...
  • Page 4 • If you’re using an extension cord or power strip with the printer, make sure that the total of the amperes required by all the equipment on the extension is less than the extension’s rating. Generally, the total ratings of all equipment plugged into any one power line should not exceed 15 amperes.

  • Page 5: Table Of Contents

    ontents Introduction ......................1 Chapter 1: Installation ................... 3 Unpacking ........................3 Removing Shipping Retainers ................ 4 Installing Ribbon Cartridge ..................5 Making Connections ....................6 Connection with Computer ................6 Connection with Power ................... 8 Chapter 2: Loading Paper ..................9 Loading Single-Sheet Paper ..................
  • Page 6 Performing Basic Tasks .................... 39 Selecting Print Quality .................. 39 Selecting Character Pitch ................40 Testing Your printer ..................42 Resetting Top of Form ................... 45 Using Bar codes ....................45 Chapter 4: Working with Software ..............49 Basic Terminology ....................49 Printer Commands ..................
  • Page 7 Appendix E: ASCII Character Codes .............. 119 ASCII Character Sets ....................119 Code Page ........................ 123 Appendix F: Interfacing ..................125 Pin Assignments for Parallel Interface Signals ..........125 Universal Serial Bus (USB) ..................126 Installing the Serial Interface ................127 Pin Assignments for Serial Interface Signals ............
  • Page 8 ntroduction This Guide is arranged to help you get your new MICROLINE 790 or 791 printer set up and running quickly as well as providing you with more detailed information for future reference. Here’s how it’s organised: • Chapter 1 (Installation) shows you how to get your printer ready to run and how to connect it to your computer.

  • Page 9: Introduction

    Introduction...

  • Page 10: Chapter 1: Installation

    hapter 1: Installation This chapter explains how to unpack and install your new printer. Unpacking Unpack your printer and make sure you have the following items. If you are missing any of these items, contact your dealer immediately for a replacement. •...

  • Page 11: Removing Shipping Retainers

    Removing Shipping Retainers 1. Open access cover by grasping tabs at either end and lifting. 2. Remove printhead shipping retainer (leave cover open for installation of rib- bon). Shipping retainer Installation...

  • Page 12: Installing Ribbon Cartridge

    Knob Paper 3. Hold the knob and remove the paper separator separator. 4. Remove the protective material. " "mark Paper separator Protictive material 5. Set and attach the post to the“∆”mark of the upper cover and the paper sepa- rator. "...

  • Page 13: Making Connections

    Important! Be sure to use only ribbons specifically for use with MICROLINE 790 series. For best results, use genuine OKI ribbons. Headgap lever Making Connections Connection with Computer There instructions are for the standard parallel interface and USB interface. Instructions for installation/connection of a serial interface are included with the serial interface ac- cessory.
  • Page 14 Pin assignments for the parallel, USB and the serial interfaces are listed in appendix E. You must supply the cable for connecting your printer to your computer. a. In the case of parallel interface cable 1. Make sure both printer and computer are OFF.

  • Page 15: Connection With Power

    Connection with Power 1. Make sure both printer and computer are OFF. 2. Plug power cord into back of printer. Plug other end into grounded outlet. Power cord Socket 3. Turn printer on. Printhead will cross back and forth along platen, and POWER light will come on.

  • Page 16: Chapter 2: Loading Paper

    hapter 2: Loading Paper Your printer has provision for single-sheet paper feed from the top and for continu- ous-form paper feed from the rear. You can also install options: the Cut Sheet Feeder, which holds a stack of 100 sheets for feeding from the top and the Push and/or Pull Tractors for feeding continuous-form labels, heavy card stock or multi-part forms from the bottom.
  • Page 17 Bottom feed (continuous forms only, thickness to 0.017” [0.44mm]) • Single-part continuous forms – 12 to 24 lb – Minimum 3” wide (* • Carbonless, multi-part forms – Original, plus 4 copies – 9 to 11 lb – Minimum 3” wide (* •...

  • Page 18: Loading Single-Sheet Paper

    Loading Single-Sheet Paper The single-sheet paper path is best for letterhead stationery, memos, and envelopes. We also recommend it for printing graphs and charts because it provides the most accurate control of the paper. To load in single sheets of paper: If you have any continuous-form paper in the paper path, you must press the PARK button on the front panel to remove it from the path before lading single sheets.
  • Page 19 3. Grasp back of paper separator and un- Paper Wire feed snap it from housing, then swing it up separator guide into single-sheet feed position, making sure that wire feed guide is nestled in separator. Paper feed 4. Adjust paper feed guides for width of guides paper and drop sheet of paper into separator.
  • Page 20 5. Baseline for Top of Form (TOF) on pa- per is indicated by red line on clear plas- tic paper shield. Baseline 6. If desired, change TOF setting using Press to feed control panel: paper down in Hold micro increments to set TOF further down on page, hold SHIFT button while pressing FF/ LOAD button: this will advance paper...

  • Page 21: Loading Rear-Feed Paper

    Loading Rear-Feed Paper The rear-feed paper path is recommended for single-thickness, continuous fan-fold paper when printing spreadsheets, long reports, etc. For graphics or charts, it’s best to use the single-sheet paper path. To load continuous-form paper from the rear: 1. If you have paper in paper path, be sure to remove it before installing rear-feed paper.
  • Page 22 4. Hold up the middle part of the paper Paper separator and pull upwards. separator 5. Rotate the paper separator forward and stand against pull-up rolller assembly. Pull-up roller assembly 6. Locate tractors. Tractors ML790/791 Printer Handbook...
  • Page 23 7. Pull up on lock levers to release trac- Lock lever Tractor cover tors. Position right-hand tractor for width of paper you’re loading. The movement of the left tractor is limited to ensure that the paper will always contact the paper sen- sor when loaded.
  • Page 24 10.Replace the paper separator and insert until the paper separator and upper Paper cover marks align. separator Upper cover " "mark " "mark ML790/791 Printer Handbook...
  • Page 25 11.Close tractor covers and adjust left trac- tor to position edge of paper: reference marks on printer indicate left edge po- sition for the two most common paper sizes. When paper is properly aligned, lock left tractor in place by pushing back on lock lever.
  • Page 26 14.Push FF/LOAD button. Paper will au- tomatically feed into printer and ALARM light will go out. 15.Baseline for top of Form(TOF) on pa- per is indicated by red line on clear plas- tic paper shield. Baseline 16.If desired, change TOF setting using Press to hold the Press to bring control panel:...
  • Page 27 to move TOF further up on page, Press to feed hold SHIFT button while pressing LF paper down in Hold button: this will advance paper down micro increments in micro increments Press to feed paper up in micro increments 17.Press SEL button (SEL light will come on).

  • Page 28: Paper Handling

    Paper Handling Your printer has several handy paper handling features: • Tear • Form Tear-off • Paper Park Tear Feature When you’re using continuous forms with either the built-in rear-feed tractor or the optional bottom-feed push tractor, you can use this feature to advance the forms up to the tear position so you can easily tear off a printed sheet without wasting paper or readjusting the printer.

  • Page 29: Forms Tear-Off Feature

    Forms Tear-off Feature Caution! Do not engage Forms Tear-off when printing on labels! The Forms Tear-off feature can be engaged to automatically move the paper up to the tear position after the selected interval (500 milliseconds, one second, or two seconds). The page will stay in the tear-off position until the printer receives data.

  • Page 30: Switching Paper Paths

    Switching Paper Paths To switch from continuous-form feed from the rear or bottom (optional push or pull tractor installed) of the printer to single-sheet feed from the top: 1. Tear off printed pages. 2. Press PARK button. 3. Swing wire guide up into paper separator, then pivot separator to upright posi- tion.
  • Page 31 Loading Paper...

  • Page 32: Chapter 3: Operation

    hapter 3: Operation This chapter explains how to operate your printer. It also provides instructions on how to change the default settings and how to perform basic tasks, including select- ing typeface/print quality, selecting character pitch, testing your printer, and reset- ting Top of Form to the factory default.
  • Page 33 The seven buttons to the left on your control panel are multi-function buttons. In routine printer operation, they are used to manipulate the paper, but you can also use them to enter and make changes in the printer’s program menu. The PRINT QUALITY and CHARACTER PITCH sections at the right on the front panel are used to select the quality and size of the printing.

  • Page 34: Print Mode

    Print Mode In its normal operating state, your printer’s front panel is in the Print Mode. Indicator Lights In the Print Mode, your printer has the following lights to indicate its status: 1. POWER light: Glows whenever printer is on. 2.

  • Page 35: Buttons

    Buttons When the printer is selected (SEL light on), only the functions marked at the top of the bank of buttons (LF, FF/LOAD, TEAR, PARK, QUIET) are in effect. When the printer is deselected (SEL light off), the functions marked at the bottom of the buttons (Micro Feed Down, Micro Feed Up, TOF) can be accessed by means of the SHIFT button.
  • Page 36 Summary of Front Panel Button Functions Button Print Mode Menu Mode Help on Power Up With CSF Installed Selects/deselects printer. Activates Menu Same as Print Resets Paper Resets Paper Out of Paper Mode. Mode Out Alarm. Jam Alarm. Also ends Font Test or Rolling ASCII test .
  • Page 37 Button Print Mode Menu Mode Help on Power Up With CSF Installed TEAR+ Move the print head to Re- Move the print Goes back to SHIFT verse. head to Reverse. previous Value in Menu. PARK Parks continuous-form pa- Ejects paper. Prints list of all per.
  • Page 38 Button Print Mode Menu Mode Help on Power Up With CSF Installed SEL+LF Resets Menu to factory default. QUIET+ Resets Top of PARK Form to factory default. SEL+ Activates hex FF/LOAD dump mode. N/A : Not applicable. ML790/791 Printer Handbook...

  • Page 39: Menu Mode

    Menu Mode When your printer is in the Menu Mode, you can use the front panel controls to change the defaults for the printer parameters, including emulation, page length, line spac- ing, typeface, pitch, etc. For example, you might want to change the page length to 14 inches if you’re printing on legal-size documents, or to 3 inches if you’re printing on labels or small cards.

  • Page 40: Sample Menu

    Sample Menu The menu is made up of groups of parameters. Within each group is a list of items and each of those items has several possible settings. Here’s a sample Menu printout. The first column lists the groups; the second, items; the third, settings: ML790/791 Printer Handbook...

  • Page 41: Summary Of Menu Settings

    Summary of Menu Settings The table below details the entries in the printer Menu as it comes from the factory. The defaults are in bold face italic type. Other entries will appear in the Menu depending on what options you have installed and what emulation is engaged.
  • Page 42 Group Item Setting Bottom Feed Line Spacing 6 LPI, 8 LPI Form Tear-Off Off, 500 ms, 1 sec, 2 sec Skip Over Perforation No, Yes Page Width * 13.6", 8" Page Length 11", 11 ", 12", 14", 17", 5", 3", 3.5", 4", 5.5", 6", 7", 8", 8.5"...
  • Page 43 Group Item Setting Set-Up Operator Panel Function Full Operation, Limited Operation Reset Inhibit No, Yes Print Suppress Effective Yes, No Auto LF No, Yes Auto CR * No, Yes SI Select Pitch (10 CPI) * 17.1 CPI, 15 CPI SI Select Pitch (12 CPI) * 20 CPI, 12 CPI Time Out Print Valid, Invalid...

  • Page 44: Menu Mode Indicator Lights

    Menu Mode Indicator Lights In the Menu Mode, the following lights indicate your printer’s status: 1. POWER light: Glows when printer is on. 2. MENU light: Glows when printer is in Menu Mode. Menu Mode Buttons ML790/791 Printer Handbook...

  • Page 45: Resetting Menu To Factory Defaults

    Here is a summary of the buttons active in the Menu Mode: 1. GROUP button: Press to scan through groups of listings. Each time you press the GROUP button, a line will print, showing the next group in the Menu. To go back one group, hold the SHIFT button while pressing the GROUP button.

  • Page 46: Performing Basic Tasks

    Performing Basic Tasks Selecting Print Quality Print quality button Your printer allows you to select from three print qualities: HSD, utility and letter quality (LQ), HSD and Utility printing are in the Gothic typeface. The LQ printing is of noticeably higher quality and offers you a choice of seven typefaces: Courier, Gothic, Prestige, Orator, Swiss Bold, Roman and Swiss.

  • Page 47: Selecting Character Pitch

    Selecting Character Pitch Character Pitch button The character pitch determines the width of the individual characters and is mea- sured in characters per inch (cpi). To select the character pitch, press the CHARAC- TER PITCH button successively until the light underneath the pitch you wish to en- gage is lit (10 cpi, 12cpi, 15cpi, 17cpi, 20cpi, or Proportional).
  • Page 48 The table below summarizes the fonts available from your printer: Typeface Spacing Style LQ Courier 10 cpi Normal, superscript, subscript 12 cpi Normal, superscript, subscript Proportional Normal, superscript, subscript 8 point Normal LQ Letter Gothic 10 cpi Normal 12 cpi Normal Proportional Normal...

  • Page 49: Testing Your Printer

    Testing Your printer Your printer has three your can run: the Font Test, the Rolling ASCII Test, and the Hexadecimal Dump Test. Font Test The Font Test provides a printout containing samples of available typefaces. Here’s a portion of a Font Test printout: Operation...
  • Page 50 To run the Font Test: 1. Be sure paper is loaded. 2. Turn off printer. 3. Hold LF button for several seconds while turning printer on. (IF printer simply turns on without starting to print, you didn’t hold down LF button long enough.) Rolling ASCII Test The Rolling ASCII Test produces a continuous printout of all ASCII characters.
  • Page 51 To activate the Rolling ASCII Test: 1. Be sure paper is loaded. Caution! For wide carriage Model 791, be sure you have wide paper loaded! 2. Turn off printer. 3. Hold QUIET button for several seconds while turning printer on. (If printer sim- ply turns on without starting to print, you didn’t hold down QUIET button long enough.) Hexadecimal Dump Test...

  • Page 52: Resetting Top Of Form

    To engage the Hexadecimal Dump Mode: 1. Be sure paper is loaded. 2. Turn off printer. 3. Hold SEL and FF/LOAD buttons for several seconds while turning on printer. The printer will print the line “Hex Data Dump” and be ready to receive data in the Hexadecimal Dump Mode.
  • Page 53 You will find a list of the bar code printer commands for each emulation in appendix Here is a brief explanation of each of the available bar codes, along with a sample printout for each one. UPC A Bar Code UPC (Universal Product Code) bar coding is used in the supermarket industry.
  • Page 54 EAN 8 EAN (European Article Numbering) bar coding is a variation of UPC coding. EAN 8 encodes eight digits. EAN 13 EAN 13 encodes 13 digits and contains the same number of bars as UPC A. The thir- teenth digit combined with the twelfth digit provides a code representing a country. Code 39 Also known as 3 of 9 Code, code 39 is used in non-retail applications.
  • Page 55 Code 128 Code 128 has 106 different characters, each of which can have any one of three differ- ent meanings depending on which code set (A, B, or C) is engaged. A special code at the beginning indicates which set is engaged: three shift codes are also available for use within the bar code to indicate a change in the code set engaged, as required.

  • Page 56: Chapter 4: Working With Software

    hapter 4: Working with Software This chapter covers the fundamentals of setting up commercial software packages for use with your printer. Be sure to read your software documentation carefully for more details. Basic Terminology Before we start, let’s examine a few terms with which you may not be familiar. Printer Commands If you’re using commercial software with an appropriate printer driver (see “Printer Drivers”...

  • Page 57: Emulations

    Emulations In order to eliminate hundreds of different sets of printer commands, most printers emulate, or imitate, one of several general printers; i.e., they accept all of that printer’s commands and behave as though they were the emulated printer. Your printer has three emulations: •...

  • Page 58: Windows Printer Drivers

    IBM Proprinter Emulation IBM X24e AGM/XL24e AGM Epson LQ Emulation Emulation Oki ML 590/1 IBM Use this emulation only Oki ML 590/1 Epson IBM Proprinter when you’ve selected an IBM Epson LQ 870/ 1170 X24e/ XL24e Proprinter X24e/ XL24e driv-...
  • Page 59 Working with Software...

  • Page 60: Chapter 5: Problem Solving, Maintenance, & Service

    hapter 5: Problem Solving, Maintenance, & Service This chapter provides solutions to some common printer problems and explains the routine maintenance procedures that will help keep your printer in tip-top operating condition. It also tells you how to order parts, consumables and accessories, and pro- vides information on obtaining service for your printer.
  • Page 61 …I’m getting strange symbols, incorrect fonts, etc., when I try to print a document? The printer driver you have engaged does not agree with the emulation selected for your printer. To check the emulation selected, first make sure paper is loaded, then press the SEL and SHIFT buttons simultaneously to enter the MENU on your printer.
  • Page 62 …there are dots missing in my printouts? The head gap may not be set correctly. Try moving the head gap lever to a lower setting. If that doesn’t help, the printhead may be damaged; call for service. … the Alarm light is on and the Character Pitch 15 light is flashing? This indicates a paper loading error.
  • Page 63 …my word processor files don’t print the way I have the MENU and front panel set? Before sending a file to the printer, many word processors send either an “initializa- tion string” or an I-Prime signal to the printer. The initialization storing contains codes that reset the printer to a default set of fea- tures: otherwise the printer might accidentally print using features set for a previous job.

  • Page 64: Maintenance

    This section explains how to change ribbons, clear paper jams and clean your printer. Replacing the Ribbon Cartridge When replacing the ribbon, be sure to use only ribbons specifically for use with MICROLINE 790 /791 Turbo printers. For best results,use genuine OKI ribbons. 1. Turn printer off. 2. Disengage and swing open access cover.
  • Page 65 5. Remove new ribbon cartridge from its packaging — do NOT remove clear plastic ribbon shield! 6. Hold ribbon cartridge with knob facing Plastic shield up and exposed portion of ribbon fac- facing platen ing platen. Place flat end on ribbon plate, fitting grooves over pins on plate.

  • Page 66: Clearing Paper Jams

    Clearing Paper Jams Caution! Always turn the printer off before you turn the platen knob! Rear Feed Jams To clear a rear-feed paper jam: 1. Turn off printer 2. Turn platen knob to back paper out of printer. Remove any ripped pieces of paper. 3.
  • Page 67 4. Open tractor covers and remove paper Tractor covers from printer. 5. Open access cover and lift off pull-up Remove pull-up roller assembly. roller assembly Note: Never attach or remove the pull-up roller assembly when the paper separator is in the standing state.
  • Page 68 10.Replace pull-up roller assembly. Replace pull-up roller assembly Note: When installing a pull-up roller assem- bly, Shift the paper lever in agreement with the “Rear” mark before the installation. 11.Reload regular paper (open tractor cov- ers, place paper on pins, close tractor covers).
  • Page 69 Single Sheet Feed Jams To remove jammed single sheets of paper (top feed): 1. Turn printer OFF. 2. Rotate platen knob to back paper out of carriage. 3. If necessary, open access cover and lift Lift off pull-up roller off pull-up roller assembly to provide assembly access to remove any ripped pieces from around carriage.

  • Page 70: Cleaning The Housing

    Cleaning the Housing You should clean the printer every six months (or after about 300 hours of operation). To do this: 1. Turn printer OFF and remove paper from path. 2. Open access cover and remove pull-up Remove pull-up roller roller assembly.

  • Page 71: Accessories

    Accessories You can add even more flexibility to your printer by means of the following optional accessories. Cut Sheet Feeder, Single-Bin and Dual-Bin Mounts on the platen to provide continu- ous single-sheet paper feed. The bin will hold up to 100 sheets of standard, 20-lb paper.
  • Page 72 Pull Tractor, Top-Mount Used for bottom-feed of labels or heavy card stock, or in conjunction with the rear- feed tractor to provide more precise pa- per control when you’re using multi-part forms. Includes cover for installation in place of access cover. Roll Paper Stand Adapts ML 790 printer for use with roll- type paper (not supplied).

  • Page 73: Replacement Parts

    Replacement Parts Replacement Part Access Cover, ML 790 Access Cover, ML 791 AC Cord Poll-up Roller Assembly, ML 790 Poll-up Roller Assembly, ML 791 Platen Knob Printhead Ribbon, Black Ploblem Solving, Maintenance, & Service...

  • Page 74: Appendix A: Specifications

    ppendix A: Specifications Print Method Impact dot matrix Printhead 24 pins, 0.20 mm diameter with thermal protec- tion Print Speed Mode Characters per Second (CPS) High Speed Draft (HSD) 10 cpi 420 cps Utility 10 cpi 315 cps 12 cpi 378 cps 15 cpi 472 cps...
  • Page 75 Graphics Resolution: 360 x 360 dots per inch Resident Font Letter Quality Courier, Gothic, Prestige, Orator, Roman, Swiss, Swiss Bold Utility Gothic Bar Code: Code 39, UPC A, UPC E, EAN 8, EAN 13, Inter- leaved 2 of 5, Code 128, Postnet Receive Buffer Size MAX 128K Reliability...
  • Page 76 Paper Specifications Width Minimum 3” Maximum ML 790: 10” ML 791: 16” Weight 12 to 24 lb. Thickness Rear feed 0.014”(0.36 mm) Bottom feed 0.017”(0.44 mm) Paper type Feed Weight Width range Cut sheets Top only 14 to 24 lb. ML790: 7.2"...
  • Page 77 Dimensions (W x D x H) ML 790: 15.7 x 13.6 x 6 inch (398 x 345 x 153 mm) ML 791: 21.7 x 13.6 x 6 inch (552 x 345 x 153 mm) Weight ML 790: 16.7 lb (7.6Kg) ML 791: 21.1 lb (9.6Kg) Environmental Requirements...

  • Page 78: Appendix B: Menu Selections

    ppendix B: Menu Selections The menu selections for your printer are summarized below. Factory defaults are in- dicated in bold face italic. Explanations for each item follow the table. The table below summarizes all possible menu settings available with your printer.
  • Page 79 Group Item Setting Bottom Feed Line Spacing 6 LPI, 8 LPI Form Tear-Off Off, 500 ms, 1 sec, 2 sec Skip Over Perforation No, Yes Page Width * 13.6", 8" Page Length 11", 11 ", 12", 14", 17", 5", 3", 3.5", 4", 5.5", 6", 7", 8", 8.5"...
  • Page 80 Group Item Setting Set-Up Power Saving Enable, Disable Power Save Time 5 min, 10 min, 15 min, 30 min, 60 min Parallel I/F I-Prime Buffer Print, Buffer Clear, Invalid Pin 18 +5V, Open Auto Feed XT * Invalid, Valid Bi-Direction Enable, Disable Serial I/F * Parity...

  • Page 81: Explanation Of Menu Items

    Explanation of Menu Items These explanations are in alphabetical sequence to make it easier to look them up. Many of the items will appear only with optional equipment installed, as noted be- low. You will find the items Line Spacing, Form Tear-Off, Skip Over Perforation and Page Length appearing several times in the menu (once for each paper path).
  • Page 82 Busy Line. Appears only if optional Serial Interface is installed. SSD- (factory de- fault), SSD+, DTR, RTS. If Ready / Busy protocol (factory default) is selected, you can choose which line your system monitors for a busy signal: SSD -9V, select SSD- SSD +9V, select SSD+ DTR -9V, select DTR RTS -9V, select RTS...
  • Page 83 Emulation Mode. IBM PPR , IBM AGM, or Epson LQ (factory default). Selects the printer command set you want your printer to use: IBM X24e or XL24e Proprinter, IBM X24e or XL24e Alternate Graphics Mode (AGM), or Epson LQ 850/ 1050. Form Tear-Off.
  • Page 84 Important! This feature also prevents access to the Menu. To access the Menu, turn the printer off, then hold down the SEL key while turning on the printer. Page Length. 11” (factory default), 11 ”, 12”, 14”, 17”, 5”, 3”, 3.5”, 4”, 5.5”, 6”, 7”, 8”, 8.5”.
  • Page 85 Print Mode. LQ Courier (factory default), LQ Roman, LQ Swiss, LQ Swiss Bold, LQ Orator, LQ Gothic, LQ Prestige, HSD or Utility. Choose one of the LQ fonts for letter quality printing; choose utility for high-speed printing. Print Registration. 0 (factory default), 0.05 mm Left, 0.15 mm Left, 0.20 mm Left, 0.25 mm Left, 0.25 mm Right, 0.20 mm Right, 0.15 mm Right, 0.10 mm Right, or 0.05 mm Right.
  • Page 86 Size. Choose Single (factory default) or Double width and height printing. Skip Over Perforation. No (factory default) or Yes. Change to Yes if you want the printer to advance automatically to the next page when it comes within one inch of the bottom of the page.
  • Page 87 Appendix B: Menu Selections...

  • Page 88: Appendix C: Commands-Epson Emulation

    ppendix C: Commands–Epson Emulation This appendix contains the commands for the Epson LQ emulation, grouped by func- tion. Normally the commands in this table override Menu settings. Except as noted, these commands are cancelled and the printer returns to factory and Menu settings when the printer receives an Initialization, Software I-Prime, or Change Emulation command, or when it is turned off.
  • Page 89 =0: no movement + moves to right; - moves to left Set Print Position ASCII: ESC DLE @ P OKI unique command. Sets next hori- zontal position of printhead. Dec: 27 16 64 [data] Pn= number of parameter bytes to fol-...
  • Page 90 Epson Commands Notes Function (ASCII, Decimal, Hexadecimal) Left Margin Set ASCII: ESC l n Sets left margin n character spaces from Dec: 27 108 n printhead home position; must be at least Hex: 1B 6C n 5 spaces (5 cpi) to left of right margin. n=0 to 255 n=0: home position Right Margin Set...
  • Page 91 Hex: 1B 6A n n=0 to 255 n=0: no line feed, but initiates printing -inch Line Feed ASCII: ESC ] n OKI unique command. Executes Dec: 27 93 n inch line feed without changing line Hex: 1B 5D n spacing.
  • Page 92 Epson Commands Notes Function (ASCII, Decimal, Hexadecimal) It is a print carriage return execution command, which does not involve re- turning to previous settings following the execution of this command. Set absolute vertical print ASCII: ESC (V n Indicates the absolute position within position Dec: 27 40 86 n the paper size, and executes carriage re-...
  • Page 93 Epson Commands Notes Function (ASCII, Decimal, Hexadecimal) Set Vertical Format Unit ASCII: ESC b m n Programs up to 8 separate sets (chan- 2 ÆÆÆ (VFU) Dec: 27 96 m n nels) of vertical tab stops. 2 ÆÆÆ Hex: 1B 62 m n m=0 to 7: channel number (0 is default 2 ÆÆÆ...
  • Page 94 Epson Commands Notes Function (ASCII, Decimal, Hexadecimal) Set page format ASCII: ESC (c n Set the top and bottom margins for the Dec: 27 40 99 n currently selected paper mode. Hex: 1B 28 63 n =4, n =0: specifies the number of parameters (in bytes) to follow.
  • Page 95 Epson Commands Notes Function (ASCII, Decimal, Hexadecimal) Define Custom ASCII: ESC & 0 [data] Defines and stores in RAM up to 256 Character(s) Dec: 27 38 0 [data] utility quality character patterns. Hex: 1B 26 00 [data] Custom character will be cleared by Ini- tialize command, Software I-PRIME command, Emulation Switch command, I/F I-PRIME signal, or by turning the...
  • Page 96 Epson Commands Notes Function (ASCII, Decimal, Hexadecimal) Select Epson Character ASCII: ESC t n Table selection is made from among Dec: 27 116 n four character tables. Hex: 1B 74 n n=0: Character Table 0 n=1: Character Table 1 n=2: Character Table 2 n=3: Character Table 3 The tables designated by default are as follows:...
  • Page 97 Epson Commands Notes Function (ASCII, Decimal, Hexadecimal) set vertical length of bars: normal value is ([n x 10] + n -inch) sets width of modules or black bars, depending on style engaged. sets spacing sets ratio of wide element to narrow element : Specifies whether or not characters are to be attached...
  • Page 98 Epson Commands Notes Function (ASCII, Decimal, Hexadecimal) Print Features Utility / LQ Selection ASCII: ESC x n n=0: Utility printing Dec: 27 120 n n=1: NLQ printing Hex: 1B 78 Select Draft Font ASCII: ESC y n Select Draft Font type. Dec: 27 121 n n= 0: Utility Hex: 1B 79 n...
  • Page 99 Epson Commands Notes Function (ASCII, Decimal, Hexadecimal) Proportional Spacing ASCII: ESC p n See also ESC ! n command. Dec: 27 112 n n=1: Start proportional spacing Hex: 1B 70 n n=0: Stop proportional spacing Select 10 cpi Pitch (Pica) ASCII: ESC P Normally, selects 10 cpi (Pica).
  • Page 100 Epson Commands Notes Function (ASCII, Decimal, Hexadecimal) Score (Lines) ASCII: ESC ( - j h l n Selects underline, strike-through, or Selection Dec: 27 40 45 j h l n overscore. Hex: 1B 28 2D j h 0 l n jand h specify amount of data to follow, calculated as j + h x 256 = 1: Start underline...
  • Page 101 ESC SO. Hex: 14 Double Height Printing ASCII: ESC w n or ESC US n OKI unique command Dec: 27 119 n or 27 31 n n= 1: Start double height Hex: 1B 77 n or 1B 1F n n= 0: Stop double height Graphics, 8 &...
  • Page 102 Epson Commands Notes Function (ASCII, Decimal, Hexadecimal) = 0 to 255: specifies amount of subsequent Bit Image bytes received, calculated as n + (n x 256) Graphics, 8 -pin Mode Single Density Graphics ASCII: ESC K n [graphic data] Dot density 60 dpi horizontal, 72 dpi Dec: 27 75 n [graphic data] vertical.
  • Page 103 Italics n=128: Underlining Miscellaneous Select emulation mode ASCII: ESC { n OKI unique command. Switches printer Dec: 27 123 n emulation mode, copying the custom Hex: 1B 7B n character data in buffer and saving the print and receive buffers.
  • Page 104 Hex: 11 received. Disable Paper-Out ASCII: ESC 8 OKI unique command. Disables paper- Sensor Dec: 27 56 out sensor, even if Paper Out Override Hex: 1B 38 in MENU is set to "On" the (factory de- fault).
  • Page 105 Notes Function (ASCII, Decimal, Hexadecimal) Software I-Prime ASCII: ESC } NUL OKI unique command. Clears data in Dec: 27 125 0 print buffer (receive buffer unaffected); Hex: 1B 7D 00 resets printer to menu default if applica- ble, non-menu features returned to fac- tory default.
  • Page 106 Notes Function (ASCII, Decimal, Hexadecimal) Turn raster graphics ASCII: ESC DLE G P OKI unique command. Activates and mode ON/ OFF Dec: 27 16 71 P deactivates raster graphics mode. Hex: 1B 10 47 P =1: specifies the number of parame-...
  • Page 107 Appendix C: Printer Commands...

  • Page 108: Appendix D: Commands-Ibm Emulation

    ppendix D: Commands–IBM Emulation This appendix contains the commands for the IBM X24e/ XL24e Proprinter and X24e AGM/ XL24e AGM emulations, grouped by function. Normally the commands in this table override Menu settings. Except as noted, these commands are cancelled and the printer returns to factory and Menu settings when the printer receives an Initialization, Software I-Prime, or Change Emulation command, or when it is turned off and then on again.
  • Page 109 Hex: 08 character pitch. Set Print Position ASCII: ESC DLE @ P OKI unique command. Sets horizontal position of printhead. Dec: 27 16 64 [data] : specifies number of bytes to follow, Hex: 1B 10 40 [data]...
  • Page 110 255 n=0: no change in line sapcing. -inch ASCII: ESC % 8 n OKI unique command. Sets line spacing Line Spacing Dec: 27 37 56 n to n/360-inch. Hex: 1B 25 38 n...
  • Page 111 Hex: 1B 35 n n=Even: auto line feed turned Off -inch Line Feed ASCII: ESC % 4 n OKI unique command. Prints data in Dec: 27 37 52 n buffer and executes a single -inch Hex: 1B 25 34 n line feed without changing line spacing.
  • Page 112 Auto-Feed mode. Cut Sheet Feeder (Option) Cut Sheet Feeder Control ASCII: ESC EM n OKI unique command. Controls Cut Dec: 27 25 n Sheet Feeder accessory. Hex: 1B 19 n n=1: Select bin 1 n=2: Select bin 2 (if present) n=73 (ASCII "I"...
  • Page 113 ID No.=863: Canadian French ID No.=865: Norway ID No.=1040: BRASCII ID No.=1041: Abicomp Select International ASCII: ESC ! n OKI unique command. Select character Character Set Dec: 27 33 n set containing special characters used in Hex: 1B 21 n foreign language printing:...
  • Page 114 Hex: 1B 36 Bar Code Commands Select Bar Code Type and ASCII: ESC DLE A m n ÆÆÆ n OKI unique command Size Dec: 27 16 65 m n ÆÆÆ n m=number of parameters specified Hex: 1B 10 41 m n ÆÆÆ...
  • Page 115 Notes Function (ASCII, Decimal, Hexadecimal) Print Postnet Bar Code ASCII: ESC DLE C n [data] OKI unique command. Data Dec: 27 16 67 n [data] n: designates amount of data to follow Hex: 1B 10 43 n [data] n=1 to 20 Data consists of single-digit numbers.
  • Page 116 10-digit: 27 91 112 Ln Hn DATA after Ln Hn DATA: Barcode data Print Features Select LQ Typeface ASCII: ESC k n OKI unique command. Selects typeface Dec: 27 107 n according to value of n: Hex: 1B 6B n n=0: Roman n=1: Swiss...
  • Page 117 Commands Notes Function (ASCII, Decimal, Hexadecimal) : sets font typeface, calculated as (H x 256) + L : Sets character width (cpi), calculated as x 256) + L fa: sets spacing attribute; n=2: prints Proportional; n=any other value, cpi set by H Hc Lc: Code page setting, ID=Hc x 256+Lc Code page ID (Hex) Code page name...
  • Page 118 Hex: 1B 3A ESC: will change 17.1 cpi to 20 cpi and will not change 20 cpi. Set 15 Cpi Pitch ASCII: ESC g OKI unique command. Sets 15 cpi. Dec: 27 103 Hex: 1B 67 Set Compressed Pitch ASCII: SI...
  • Page 119 15 cpi, LQ, ROM n=32: 20 cpi, UTL, ROM n=34: 20 cpi, LQ, ROM Start Italic Printing ASCII: ESC % G OKI unique command. Italic characters Dec: 27 37 71 may overlap slightly. Hex: 1B 25 47 Stop Italic Printing ASCII: ESC % H OKI unique command.
  • Page 120 Commands Notes Function (ASCII, Decimal, Hexadecimal) Select Character Style ASCII: ESC q n Selects character style. Dec: 27 113 n n=0: normal Hex: 1B 71 n n=1: outline n=2: shadow n=3: outline with shadow Start Emphasized ASCII: ESC E Prints horizontally shifted double dots Printing Dec: 27 69 in utility mode at half speed.
  • Page 121 Commands Notes Function (ASCII, Decimal, Hexadecimal) Overscore ASCII: ESC _ n Prints a continuous overscore over all Dec: 27 95 n text characters except for tab spaces. Hex: 1B 5F n n=0 to 255 n=odd: start overscore n=even: stop overscore Graphics, 8-Pin Mode For all 8-pin graphics commands the number of...
  • Page 122 Commands Notes Function (ASCII, Decimal, Hexadecimal) ESC Y, and ESC Z commands. Ratio is determined by value of variable n: n=0 or 1: 5 horizontal/ 6 vertical n=2: 1 horizontal/ 1 vertical n=3: Command ignored Invalid (trapped) in IBM AGM emula- tion.
  • Page 123 + (h x 256) Miscellaneous Commands Select Emulation Mode ASCII: ESC { n OKI unique command. Switches printer Dec: 27 123 n emulation mode, copying the custom Hex: 1B 7B n character data in buffer and saving the print and receive buffers.
  • Page 124 Sensor can also be controlled by the MENU. OKI unique command. Sets the printer Software I-Prime ASCII: ESC } NUL to the same state as if it had been shut off...
  • Page 125 Appendix D: Printer Commands...

  • Page 126: Appendix E: Ascii Character Codes

    ppendix E: ASCII Character Codes ASCII Character Sets ML790/791 Printer Handbook...
  • Page 127 Appendix E: ASCII Character Codes...
  • Page 128 ML790/791 Printer Handbook...
  • Page 129 Appendix E: ASCII Character Codes...

  • Page 130: Code Page

    Code Page ML790/791 Printer Handbook...
  • Page 131 Appendix E: ASCII Character Codes...

  • Page 132: Appendix F: Interfacing

    ppendix F: Interfacing This appendix gives the pin assignments for the parallel interface and Universal Se- rial Bus (USB). It also explains how to install the optional Serial Interface Board and gives the pin assignments for the serial interface. Pin Assignments for Parallel Interface Signals Signal Return Pin Direction...

  • Page 133: Universal Serial Bus (Usb)

    Universal Serial Bus (USB) Universal Serial Bus Specification Revision 1.1 compliance. 1. Connector • Printer Side: “B” Receptacle (Upstream Input to the USB Device) • Cable Side: Series “B” Plug 2. Cable • Cable Lenght: Max 5 m (A cable must be met USB Spec Rev 1.1 for normal opera- tion) Note: Cable is not provided.

  • Page 134: Installing The Serial Interface

    Installing the Serial Interface Caution! Handle the interface board with care to avoid damaging its components. The components can also be damaged by static discharges. We recommend that you leave the board in its protective packaging until you’ve read these instructions and are ready to install it.
  • Page 135 3. By inserting board to the far end, it is Board locked by the lock piece inside. Lock piece 4. Connect suitable interface cable (must be purchased separately) to printer con- nector and to serial port of your com- puter. Be sure to tighten screws on both ends of cable to keep it in place.

  • Page 136: Pin Assignments For Serial Interface Signals

    Pin Assignments for Serial Interface Signals Signal Symbol Direction Protective Ground Transmitted Data From Printer Received Data To Printer Request to Send From Printer Not used Data Set Ready To Printer Signal Ground 8-10 Not Used Supervisory Send Data From Printer 12-19 Not Used Data Terminal Ready...
  • Page 137 Ltd. 6th Floor, Rama IV Rd., Fax : (662) 636 2536 Bangkok 10500, Thailand www.okisysthai.com Oki Hong Kong Limited Suite 1909, Tower 3, Tel : (852) 2736 0130 China Hong Kong City, Fax : (852) 2376 3725 33 Canton Rd.,...
  • Page 138 Oki Data Corporation 4-11-22, Shibaura, Minato-ku Tokyo 108-8551 Japan Tel: (81) 3 5445 6158 Fax: (81) 3 5445 6189 42114104EE...

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