OKI ML621 manual

User's Guide 59320101 my.okidata.com RT322 ML620/ML621[...]

ML620/ML621 User’s Guide 2 ML620/ML621 User’s Guide P/N 59320101, Revision 1.2 September, 2010 Every effort has been made to ensure that the information in this document is complete, accurate, and up-to-date. Oki Data assumes no responsibility for the results of errors beyond its control. Oki Data also cannot guarantee that changes in software [...]

ML620/ML621 User’s Guide 3 Chapter 1: Introduction ................................................................. 5 Printer Features ..................................................................................... 5 Oki Data on the Internet ........................................................... 5 Parts Identication: Front View ...[...]

ML620/ML621 User’s Guide 4 Chapter 5: Maintenance .............................................................. 69 Replacing the Ribbon Cartridge ........................................................ 69 Ribbon Cartridge Handling .................................................... 69 If ribbon should contact the eyes: ........................[...]

ML620/ML621 User’s Guide 5 Chapter 1: Introduction Printer Features Super reliable, durable oper ation: 25,000 hours Mean Time Between F ailures (MTBF) at 25% duty cycle and 35% page density Advanced paper handling, with built -in rear push tractor and z ero-tear forms capability . Blazing print speeds, in characters per second: High Speed Draft [...]

ML620/ML621 User’s Guide 6 Parts Identication: Front View Sheet Guide, R ear Paper T ype Lever Platen Knob Sheet Guide, Front (open to t the front feed paper tra y or the tractor) Control Panel On-Off Switch Access Cover 1. 2. 3. 4. 5. 6. 7. 1 2 3 5 6 7 4[...]

ML620/ML621 User’s Guide 7 Parts Identication: Rear View USB connector Par allel connector Optional Serial/Network connector V entilation Power Connector Optional Cut Sheet F eeder/Roll P aper Stand connector Note: The serial number of your printer is on a label on the back, beside “S/N.” 1. 2. 3. 4. 5. 6. Parts Identication: Inside Vie[...]

ML620/ML621 User’s Guide 8 The Control Panel K eys work differently according to which “mode” is active. Hold down the CHR PITCH key and press the PRINT SPEED key to enter Menu mode; repeat the sequence to exit Menu mode. In Menu mode use the purple text labels underneath the keys to identify the function of each key. The lights above these k[...]

ML620/ML621 User’s Guide 9 Control Panel Indicator Light Functions Indicator Light Color Status Explanation ALARM Red ON The paper is at its end; i.e. , no paper present. OFF Paper is present. Flashing When ashing with SEL : unrecover able status alarm. T urn the power OFF , verify that the carriage moves properly , then turn power ON again. M[...]

ML620/ML621 User’s Guide 10 Control Panel Indicator Light Functions Indicator Light Color Status Explanation PRINT QUALITY Green ON > LED 1 > LED 2 > LED 1 and 2 With ALARM light ashing: > Indicates paper park/eject jam. > Indicates paper loading jam. > Indicates incorrect media setting. ON > LED 3 > LED 2 > LED 2 an[...]

ML620/ML621 User’s Guide 11 Control Panel Indicator Light Functions Indicator Light Color Status Explanation CHR PITCH Green ON > LED 2 With TEAR light ON: > Printer is in Menu Mode . ON > LED 2 > LED 1 > LED 1 and 2 Without ALARM light ashing: > 10 CPI is selected. > 12 CPI is selected. > 15 CPI is selected. Flashing &[...]

ML620/ML621 User’s Guide 12 Print Mode Key Functions Function of Keys in PRINT MODE Key Status Function when pressed SEL On-line T akes the printer off-line. Off-line T akes the printer on-line. LF/FF (Line Feed/ Form Feed) On-line For continuous forms: when paper is loaded, performs a form feed. For cut sheets: to eject the cut sheet hold the bu[...]

ML620/ML621 User’s Guide 13 Function of Keys in PRINT MODE Key Status Function when pressed SEL + LOAD/ EJECT On-line No effect. Off-line Pressing these keys at the same time RESETS the printer to the original factory defaults. SEL + CHR PITCH On-line No effect. Off-line Selects a Menu conguration. LOAD/EJECT + SEL On-line / Off-line Performs [...]

ML620/ML621 User’s Guide 14 Chapter 2: Paper Handling This chapter describes how to use continuous forms and cut sheet paper in the printer , including: Loading Continuous F orms Paper Rear F eed Front F eed Bottom F eed (optional pull tractor) Managing Continuous F orms Paper T earing Off Continuous Forms P aper Aligning the T ear-Off Perfor ati[...]

ML620/ML621 User’s Guide 15 Loading Continuous Forms Paper T o avoid paper feeding problems: Make sure the printer is on a surface approximately 30” (76 cm) abov e the oor . Position the continuous forms supply directly below the printer , no more than 1.2” (3 cm) left or right of the printer paper path. Make sure the rear of the printer i[...]

ML620/ML621 User’s Guide 16 Note: These instructions assume you have ready access to the back of the printer. If you do not, skip down to “Front Feed.” Make sure the printer is turned ON. Make sure the P aper T ype lever is in the REAR feed position: Open the access cover (1) and set the P aper Thickness lever to suit the paper . Close the co[...]

ML620/ML621 User’s Guide 17 Grasp the sheet guide (1). Lift it slightly , then slide it off the printer . 4. From the back of the printer , locate the tractors (1). NOTE: If the tr actor assembly is in the front of the printer , open the front access door , grab the nger guides (2) on each side and pinch them together to release the guide. R e[...]

ML620/ML621 User’s Guide 18 Open the lock levers (1) and mov e the right tractor ( as viewed from the back of the printer ) to the reference mark (2) matching the width of the paper you are loading. Then close the lock lever on the right tr actor .   Move the rear paper guide to midw ay between the left and right tractor pins. Open the tractor [...]

ML620/ML621 User’s Guide 19 Front Feed 1 Lock Lever 2 Upper T ractor Co ver 3 Pins Make sure the P aper T ype lever is in the FRONT feed position.   Pull down the door to open the front sheet guide (1). 1. 2. 1 2 3 1[...]

ML620/ML621 User’s Guide 20 Make sure the tr actor assembly is in the front of the printer . If the tractor is in the back, remove the sheet guide, grab the nger guides (1) on each side and pinch them together to release the guide. R emove it from the back and insert it into the front feed and when it is seated, push down to snap the guides in[...]

ML620/ML621 User’s Guide 21 Bottom Feed (optional pull tractor) Make sure the printer is turned OFF . Remo ve the access cover . Adjust the P aper Thickness Lever to suit the paper . Make sure the P aper T ype Lever is in the PULL position.   Place the printer on a slotted printer stand, carefully aligning the slot in the stand with the slot in[...]

ML620/ML621 User’s Guide 22 NOTE: If the TOF position shifts because of taking up slack, press the LF/FF key to set the TOF position. Do not use the platen knob for this option as this will cause irregular line spacing. Tearing Off Continuous Forms Paper With the SEL indicator illuminated, press the TEAR key to feed the continuous forms to the te[...]

ML620/ML621 User’s Guide 23 Loading Cut Sheet Paper There are two methods of loading single sheets of cut sheet paper , top feed and front feed. See the following pages for instruction. Cut Sheet Paper, Top and Front Feed Make sure the printer is turned ON. Note: If there is any continuous forms paper in the printer, eject it as described in “R[...]

ML620/ML621 User’s Guide 24 Open the access cover and adjust the Paper Thickness lev er (1) to suit the paper . NOTE: If the Paper Thickness lever setting does not match the paper, feeding and printing may not work properly. With the printing side downwards for top feed and upwards for front feed and the left edge aligned with the P aper Guide (1[...]

ML620/ML621 User’s Guide 25 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 . T o eject a cut sheet left in the printer , follow these steps: Press the SEL button to take the printer off -lin[...]

ML620/ML621 User’s Guide 26 Top of Form (TOF) Important! If you turn the platen knob when the printer is on, the Top of Form misaligns. Always shut the printer off before turning the platen knob. Note: The factory default setting for the Top of Form (where the printing should begin) is 11/12” (23.28 mm) down from the top of the page. T op of Fo[...]

ML620/ML621 User’s Guide 27 Determining if Forms Tear-Off is Off or On When the TEAR light is blinking, it indicates that the printer is in TEAR position (i.e. , the paper is ready to be torn off ). There are two ways to determine the status of the Forms T ear-Off menu setting: Print the Menu Use the TEAR key To print the Menu: Make sure paper is[...]

ML620/ML621 User’s Guide 28 Setting Top of Form (TOF): Notes: Adjusting the TOF can be done in cut sheet or continuous forms mode. If necessary, print the menu settings to determine where the current TOF is set. The default TOF is set at 11/12” (23.28 mm). With paper loaded and the printer on and selected: Align the paper with the rst print [...]

ML620/ML621 User’s Guide 29 Resetting Top of Form to the Factory Default The factory default setting for the T op of Form (where the printing should begin) is 11/12” (23.28 mm) down from the top of the page. T o reset the T op of Form to the factory default: Remo ve paper from the paper path. T urn the printer off . Press and hold LF/FF + TEAR [...]

ML620/ML621 User’s Guide 30 Forms Tear-Off Feature Note: This feature is normally turned off. To use Forms Tear‑Off, you must enter the menu and change the setting to the desired time interval (see next page). The F orms T ear-Off feature allows a printed continuous forms page to be torn off without wasting paper or adjusting the printer . It c[...]

ML620/ML621 User’s Guide 31 Changing the Forms Tear-Off Setting Note: The default setting for Forms Tear‑Off is OFF. T o change the Forms T ear-Off setting: Hold down the CHR PITCH key and press the PRINT SPEED key . Press GROUP repeatedly until the R ear Feed or Bottom F eed group shows in the rst column of the printed line, depending on wh[...]

ML620/ML621 User’s Guide 32 Paper Park Important! Never park labels! Paper park allows y ou to switch to single-sheet printing without removing continuous feed paper from the printer . T o print single cut sheets: T ear off the last page of the continuous form paper . Press the LOAD/EJECT key; this causes a P aper Empty alarm. Move the paper R el[...]

ML620/ML621 User’s Guide 33 Paper Type Table P A P E R T Y P E L E V E R PO S I T I O N 1 2 3 4 5 6 7 8 9 10 Cut Sheet Paper 52-81 g/m 2 Χ 81-128 g/m 2 Χ 128-156 g/m 2 Χ Post Card Χ Envelope Χ Continuous Paper 52-81 g/m 2 Χ 81-128 g/m 2 Χ Carbon Paper or Pressure-Sensitive Paper (40 g/m 2 ) 2-part Χ 3-part Χ 4-part Χ 5-part Χ 6-part Χ[...]

ML620/ML621 User’s Guide 34 Chapter 3: Print Settings This section describes how to set and manage: Print Quality Character Pitch Print Speed Emulations For more print setting options, see the Menu settings in chapter 4.    [...]

ML620/ML621 User’s Guide 35 Print Quality Important! Front panel settings for print quality and character pitch are normally overridden by software commands. Draft: Utility —the default Medium quality , medium speed (380 cps) Gothic typeface only HSD: High Speed Draft Lower quality , higher speed (507 cps) Gothic typeface only SSD: Super Speed [...]

ML620/ML621 User’s Guide 36 There are two CHARACTER PITCH indicator lights: The sequence of lights shows which character pitch is active:   10 CPI   12 CPI  15 CPI    17 CPI   20 CPI     PROPOR TIONAL (  = light off ,  = light on,  = blinking light) The default[...]

ML620/ML621 User’s Guide 37 Print Speed There are two PRINT SPEED indicator lights: The sequence of lights shows which print speed is active:   Normal   HIGH-SPEED  QUIET    HIGH-COPY (  = light off ,  = light on,  = blinking light) The default PRINT SPEED is “Normal. ” T o change[...]

ML620/ML621 User’s Guide 38 Emulations IBM ® Proprinter III — factory setting Epson ® FX Oki ® MICROLINE ® Changing Emulations Make sure paper is loaded. Press SEL . Hold down the CHR PITCH key and press the PRINT SPEED key . Press LF/FF . The following line prints: Printer Control Emulation Mode IBM PPR Press TEAR repeatedly until the emul[...]

ML620/ML621 User’s Guide 39 Chapter 4: Menu Mode Note: Please print the current Menu Mode settings before you reset or change them. This is the only way to have a record of the settings. In Menu Mode, you use the front panel k eys to change the defaults for the printer parameters. The changes you make in the Menu Mode are automatically saved when[...]

ML620/ML621 User’s Guide 40 Menu Mode Keys and Functions The following table describes the function of the keys in Menu Mode. Menu Mode Keys and Functions Key Function GROUP A GROUP is a general categorization of functions/features. Use the GROUP key to cycle forw ard through the options. Each time GROUP is pressed the next Group menu option is p[...]

ML620/ML621 User’s Guide 41 Resetting the Menu to the Factory Defaults Note: Please print the current Menu Mode settings before you reset or change them. This is the only way to have a record of the settings. T o reset the Menu to the standard settings (factory defaults): T urn the printer off . Press and hold down the SEL and LF/FF keys at the s[...]

ML620/ML621 User’s Guide 42 Printing the Menu Settings Printing the Current Menu Settings Make sure paper is loaded in the printer . Press the SEL key to take the printer ofine (the SEL light will turn off ). While pressing the CHR PITCH key , press the PRINT SPEED key . Press the PRINT QUALITY key . Printing All Menu Settings T o print out a [...]

ML620/ML621 User’s Guide 43 Menu Settings Table For a complete explanation of each menu item, see “Explanations of Menu Items” later in this chapter . The table below shows the items which may appear in the menu. Settings which are engaged at the factory (defaults) are set in bold italic . Some groups or entries will only appear when a speci?[...]

ML620/ML621 User’s Guide 44 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Font (cont.) Proportional Spacing Change the setting to Y es to engage proportional spacing of characters. No , Y es Style Change to italics if you want the printed characters to be slanted. Normal , Italics Size 1 Change to Double for [...]

ML620/ML621 User’s Guide 45 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Symbol Sets ( cont .) Code Page Choose the Code P age character set you wish to use. USA , Canada French, Multilingual, Portugal, Norw ay , T urkey , Greek_437, Greek_869, Greek_928, Greek_437 CYPRUS, P olska Mazovia, Serbo Croatic I, S[...]

ML620/ML621 User’s Guide 46 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Rear F eed (Push) (cont.) Form T ear-Off 5 Specify manual form paper advancement or select a time; when printer is idle for .5, 1 or 2 seconds, paper is advanced from the current print position to the tear position. When data is receive[...]

ML620/ML621 User’s Guide 47 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Rear F eed (Push) (cont.) Page Length Specify the length of a continuous form. 3” (76.2 mm), 3.25” (82.6 mm), 3.33” (84.7 mm), 3.5” (88.9 mm), 3.66” (993.1 mm), 4” (101.6 mm), 5” (127 mm), 5.5” (139.7 mm), 6” (152.4 mm[...]

ML620/ML621 User’s Guide 48 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Rear F eed (Push) (cont.) Continuous Paper T op of Form For continuous forms, sets a T OF in small increments. 1/12” (2.12 mm), 2/12” (4.23 mm), 3/12” (6.35 mm), 4/12” (8.47 mm), 5/12” (10.58 mm), 6/12” (12.70 mm), 7/12” ([...]

ML620/ML621 User’s Guide 49 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Front Feed (Push) (cont.) Skip Over P erforation Specify whether to skip over perforations or not. When a skip- over command is receiv ed, it is given priority . If your software has its own page formatting controls, leave the default s[...]

ML620/ML621 User’s Guide 50 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Front Feed (Push) (cont.) Cut Position Adjust Specify an adjustment v alue for where to cut the end of a continuous form. –20 ~ –1, 0 , +1 ~ +20 TOF Adjust Specify an adjustment v alue for the reference position for the T op of Form[...]

ML620/ML621 User’s Guide 51 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Front Feed (Push) (cont.) Centering Position Used to limit printhead tr avel when printing narrow columns. Select Mode 1 for ML620. Select Mode 1 or Mode 2 for the ML621. Default , Mode1, Mode2 Pull Line Spacing Change to 8 lines per in[...]

ML620/ML621 User’s Guide 52 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Pull (cont.) Page Length Specify the length of a continuous form. 3” (76.2 mm), 3.25” (82.6 mm), 3.33” (84.7 mm), 3.5” (88.9 mm), 3.66” (993.1 mm), 4” (101.6 mm), 5” (127 mm), 5.5” (139.7 mm), 6” (152.4 mm), 7” (177.[...]

ML620/ML621 User’s Guide 53 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Cut Sheet T op Feed (cont.) Page Width (only displayed for ML621) 4 Change to 8” to print on narrow paper . 13.6” , 8” Page Length Specify the length of a cut sheet page. 3” (76.2 mm), 3.25” (82.6 mm), 3.33” (84.7 mm), 3.5?[...]

ML620/ML621 User’s Guide 54 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Cut Sheet T op Feed (cont.) Cut Sheet Auto Eject Position For cut sheets, when it reaches the selected measurement, measured from the bottom of the page, it ejects the paper . .25” (6.35 mm) , .5” (12.7 mm), 7/12” (14.82 mm), Inv [...]

ML620/ML621 User’s Guide 55 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Cut Sheet T op Feed (cont.) Centering Position Used to limit printhead tr avel when printing narrow columns. Select Mode 1 for ML620. Select Mode 1 or Mode 2 for the ML621. Default , Mode1, Mode2 Cut Sheet Front Feed Line Spacing Change[...]

ML620/ML621 User’s Guide 56 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Cut Sheet Front Feed ( cont .) Paper Length Control If you are printing single sheets no longer than 17 inches and wish the printer to acknowledge the menu setting for T op Feed P age Length, change the setting to “by Menu Setting. ?[...]

ML620/ML621 User’s Guide 57 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Cut Sheet Front Feed ( cont .) LF Revise Adjust the line feed in cut sheet mode. –14 ~ –1, 0 , +1 ~ +14 Centering Position Used to limit printhead tr avel when printing narrow columns. Select Mode 1 for ML620. Select Mode 1 or Mode [...]

ML620/ML621 User’s Guide 58 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Set-Up (cont.) Print Registr ation 1 Adjust the print starting position on printing in the reverse direction. The position moves to the right or left in 1/720” increments. –10 ~ –1, 0 , +1 ~ +10 Print Registr ation 2 Adjust the pr[...]

ML620/ML621 User’s Guide 59 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Set-Up ( cont .) Operator Panel Function 3 Set control panel operation. Limited operation locks functions on the control panel; only SEL, LOAD/EJECT , and TEAR keys work. Full Operation , Limited Operation Reset Inhibit T o prevent a re[...]

ML620/ML621 User’s Guide 60 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Set-Up ( cont .) SI Select Pitch (10 cpi) 8 (only displayed for IBM Emulation) Sets the pitch to be engaged when the printer control panel is set for 10 cpi and the SI command is received. 15 cpi, 17.1 cpi SI Select Pitch (12 cpi) 8 (on[...]

ML620/ML621 User’s Guide 61 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Set-Up ( cont .) Host Interface Set which interface the printer uses to receive printing commands. Auto Interface , Par allel, USB, Optional I/F Time Out Sets the length of time before the interface switches to idle status when no print[...]

ML620/ML621 User’s Guide 62 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Set-Up ( cont .) Rev erse Feed Control In reverse feed the paper is reverse fed back to the original printing position. TOF Stop , TOF Over Print Direction at DH Mode Set the print direction when printing double-height characters. In un[...]

ML620/ML621 User’s Guide 63 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Set-Up ( cont .) FF Function Set the feeding operation upon receiving an FF code after cut sheet paper is fed. Eject, Form Feed Cut Sheet Park Function T o enable paper feed out of the cut sheet feeder , set to V alid. Invalid , V alid [...]

ML620/ML621 User’s Guide 64 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Par allel I/F (cont.) Auto F eed XT 9 (only displayed for EPSON Emulation) If your system uses pin 14 of the parallel interface to control automatic line feed, change the setting to V alid. Invalid , V alid Bi-Direction Set whether to r[...]

ML620/ML621 User’s Guide 65 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Serial I/F (cont.) Baud Rate Set this to match your system’ s transmission speed. 19200 bps, 9600 bps , 4800 bps, 2400 bps, 1200 bps, 600 bps, 300 bps DSR Signal Used with the R eady/Busy protocol (factory default) to select the way y[...]

ML620/ML621 User’s Guide 66 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) CSF (Cut Sheet Feeder) Bin 1 (Appears only when the optional Cut Sheet Feeder is installed.) Line Spacing Change to 8 lines per inch (lpi) to get more lines on a page. 6 LPI , 8 LPI Page Width 4 (only displayed for ML621) Change to 13.6[...]

ML620/ML621 User’s Guide 67 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) CSF (Cut Sheet Feeder) Bin 1 (cont.) Cut Sheet T op of Form Specify an adjustment v alue for the reference position for the TOF position when feeding a cut sheet (up to the mid-section of characters in the rst line). 1/12” (2.12 mm[...]

ML620/ML621 User’s Guide 68 MENU SETTINGS TABLE Group Item Function Settings (defaults are set in bold italic ) Extension (cont.) Right Margin (Cut Sheet) If the printer data exceeds the width of the paper , printing is truncated column-by-column. Specify a margin from the right edge of the paper . Right Margin Over , .0394” (1 mm) , .0787” ([...]

ML620/ML621 User’s Guide 69 Chapter 5: Maintenance Replacing the Ribbon Cartridge Important! Make sure you have the correct replacement ribbon for your printer. The wrong ribbon will not print when installed in your printer. Look for the printer model number on the ribbon package. Ribbon Cartridge Handling Leave unused ribbon cartridges in their [...]

ML620/ML621 User’s Guide 70 Swing the used ribbon cartridge up off the printhead, lift it out, and discard it. Remo ve the new ribbon cartridge from its wrapping and note the position of the Ribbon Guide (1), Knob (2), and Pin (3). In the direction indicated by the arrows, 4. 5. 6. insert the pins at both ends of the ribbon cartridge (1) into the[...]

ML620/ML621 User’s Guide 71 Set the P aper Thickness lever to match the paper being used. Close the access cover and turn the printer back on. 10. 11. NOTE: Make sure that the guide is pushed to the end of the printhead. Move the printhead horiz ontally to make sure that the ribbon is properly installed. T urn the take-up knob in the direction of[...]

ML620/ML621 User’s Guide 72 CAUTION! If ribbon should contact the eyes: Flush eyes with large quantities of water for 15 minutes, keeping eyelids open with ngers. Seek medical attention. If ribbon should contact the skin W ash thoroughly with soap and water . For more information See the Material Safety Data Sheet in your Warranty, Regulatory,[...]

ML620/ML621 User’s Guide 73 Raise each Pin T ractor cov er and remove the continuous forms from the Pin T ractors. Rotate the platen knob and remo ve the forms from the front of the printer . If a form fragment remains inside the printer , place two or three forms in a stack on the Pin T ractors and turn the platen knob to push the fragment out o[...]

ML620/ML621 User’s Guide 74 Cut Sheet Paper Jams WARNING: Do not carry out any operations inside the printer with the Power Switch set to ON. Make sure the printer is turned OFF. Open the access cover . Set the P aper Thickness Lever to position 10. CAUTION! The printhead may be HOT! Remo ve the ribbon cartridge. See “R eplacing the Ribbon Cart[...]

ML620/ML621 User’s Guide 75 When the paper jams are cleared, replace the ribbon cartridge, close the access cover and turn the printer back on. 8. Cleaning the Printer T o keep your printer in good oper ating condition, you are advised to clean it regularly . WARNING! Turn the printer OFF and disconnect the power cable from the printer before cle[...]

ML620/ML621 User’s Guide 76 Printer Interior WARNING! Allow the printhead to cool before cleaning inside the printer. To avoid any risk of re or electric shock, do not use any ammable solvents for cleaning the printer. Y ou should clean the printer housing every six months (or after about 300 hours of oper ation). Use the platen knob to bac[...]

ML620/ML621 User’s Guide 77 Testing the Printer Font Sample T est Rolling A SCII T est Hexadecimal Dump Mode Font Sample Test Important! Wide carriage Model ML621: If you are using 8.5” paper to run the tests, make sure the paper width selection in the printer menu is set to 8.5 inches. Otherwise, printing on the platen may damage the printer. [...]

ML620/ML621 User’s Guide 78 Rolling ASCII Test Important! Wide carriage Model ML621: If you are using 8.5” paper to run the tests, make sure the paper width selection in the printer menu is set to 8.5 inches. Otherwise, printing on the platen may damage the printer. See Chapter 4: Menu Mode for more information. The Rolling A SCII Print T est p[...]

ML620/ML621 User’s Guide 79 Hexadecimal Dump Mode When the printer is placed in the Hexadecimal Dump Mode, all data received, including text and printer commands, is printed in both hexadecimal and ASCII format. For example, the following line of BA SIC code LPRINT CHR$ (27);”0”;CHR$ (30);”This is an example of a hexadecimal dump.” would [...]

ML620/ML621 User’s Guide 80 Chapter 6: Troubleshooting General Information Here are some general things to check before proceeding with detailed troubleshooting. Is the printer plugged in and turned on? Are the connections (power and interface) secure? Is the product being operated under the proper ambient conditions? Does the paper being used me[...]

ML620/ML621 User’s Guide 81 Responding to Alarm Conditions Use the following table for guidance on how to respond to alarm conditions. INDICATOR ALARM MEANINGS AND ACTIONS SEL ALARM OFF ON Paper has run out. Add paper and press the SEL key . OFF Flashing The P aper T ype lever is set incorrectly for the type of paper in use. Press the SEL key and[...]

ML620/ML621 User’s Guide 82 Problems / Solutions Use the following table to help identify symptoms and possible causes and solutions. PROBLEM CAUSE SOLUTION No p ower No powe r The powe r ca ble in n ot p rope rly c onne cted . Che ck th at t he p ower cab le i s pro perl y con necte d at bot h th e po wer outle t an d th e pri nter . P ower out [...]

ML620/ML621 User’s Guide 83 PROBLEM CAUSE SOLUTION Prin ting slow s dow n Pri nt d irect ion chan ges sud denly to unid irec tion al. Whe n the pri nthe ad o ver heat s, t he p rint er aut omati call y st arts uni dire ction al s plit pri nting . The prin ter will ret urn to i ts or igin al o per atio n whe n the pri nthe ad t empe rat ure drop s[...]

ML620/ML621 User’s Guide 84 PROBLEM CAUSE SOLUTION The inpu t ap plic atio n co ntrol sig nal is n ot cor rect. Pri nt i n hex -dump mod e an d ve rif y the dat a con tent. Mak e c orre ctio ns in the app lica tion . The inte rfac e ca ble is n ot p roper ly con necte d. R econ nect the cabl e co rrec tly . T oo hi gh o r to o low T OF (wh ere p [...]

ML620/ML621 User’s Guide 85 PROBLEM CAUSE SOLUTION The cont ent of a sin gle line is pri nted in t wo l ines . The left and /or righ t ma rgins are not cor rectl y se lect ed. R esel ect the left and righ t ma rgin s co rrect ly in the a ppli cati on. Whe n con tinu ous form s ar e use d, se ver al bla nk li nes app ear i n th e pr int -ou t. T e[...]

ML620/ML621 User’s Guide 86 PROBLEM CAUSE SOLUTION Impr oper cont inuou s fo rms f eed No line feed , an d no pap er fee d. P aper is off the P in T ra ctor s. Rel oad pape r cor rect ly . The adju st l eve r po siti on do es n ot m atch the pap er t ype. Set the adju st l eve r to the corr ect posi tion . P aper dis torti on o r ja m. Fo rms a r[...]

ML620/ML621 User’s Guide 87 PROBLEM CAUSE SOLUTION P aper fee d op era tion s fo r bot h cut she ets and cont inuo s for ms ar e ac tuat ed. The cut shee t is not eje cted . Eje ct th e cu t sh eet.[...]

ML620/ML621 User’s Guide 88 Appendix A: Parts & Accessories Purchasing Parts & Accessories Before you purchase, know your printer model number (see the front of the unit) and have the correct part number and description of the item. Item descriptions and part numbers are provided in this section. Consult the dealer where your purchased yo[...]

ML620/ML621 User’s Guide 89 Consumables Item Part Number Model ML620 Ribbon 44173403 Model ML621 Ribbon 44173404 Accessories Option Part Number Model ML620 T ractor Assembly (Pull) 44753901 T ractor Assembly (Push) 44454901 Cut Sheet F eeder 44497401 Model ML621 T ractor Assembly (Pull) 44754001 T ractor Assembly (Push) 44455001 Cut Sheet F eeder[...]

ML620/ML621 User’s Guide 90 IBM Proprinter III Commands IBM Command ASCII Decimal Backspace BS 8 Carriage Return CR 13 Character Pitch Select 10 cpi DC2 18 Select 12 cpi ESC : 27 58 Select 15 cpi ESC g 27 103 Select 20 cpi ESC SI 27 15 Select Condensed Print SI 15 Character Sets IBM Set I ESC 7 27 55 IBM Set II ESC 6 27 54 Appendix B: Printer Con[...]

ML620/ML621 User’s Guide 91 IBM Proprinter III Commands (continued) IBM Command ASCII Decimal Double Width On ESC W 1 27 87 49 Double Width Off ESC W 0 27 87 48 Emphasized Printing On ESC E 27 69 Emphasized Printing Off ESC F 27 70 Enhanced Printing On ESC G 27 71 Enhanced Printing Off ESC H 27 72 Form F eed FF 12 Form Length n inches (n = 1 to 2[...]

ML620/ML621 User’s Guide 92 IBM Proprinter III Commands (continued) IBM Command ASCII Decimal Overscore On ESC _ 1 27 95 49 Overscore Off ESC _ 0 27 95 48 Paper Out Sensor Off ESC 8 27 56 Paper Out Sensor On ESC 9 27 57 Select HSD/SSD ESC # 0 27 35 48 Select Draft ESC 1 0 27 73 0 Select NLQ Gothic ESC 1 2 27 73 2 Select NLQ Courier ESC 1 3 27 73 [...]

ML620/ML621 User’s Guide 93 Epson FX Commands Epson Command ASCII Decimal Backspace BS 8 Carriage Return, Execute CR 13 Character Pitch Select 10 cpi ESC P 27 80 Select 12 cpi ESC M 27 77 Select 15 cpi ESC g 27 103 Select Condensed Print ESC SI, or SI 27 15, or 15 Cancel Condensed Print DC2 18 Delete DEL 127 Double Height On ESC w 1 27 119 49 Dou[...]

ML620/ML621 User’s Guide 94 Epson FX Commands (continued) Epson Command ASCII Decimal Line Spacing, Set n/144” (n = 0 to 127) ESC % 9 n 27 37 57 n n/216” (n = 0 to 255) ESC 3 n 27 51 n n/72” ESC A n 27 65 n (n = 0-85 or 128-213) 1/6” ESC 2 27 50 1/8” ESC 0 27 48 7/72” ESC 1 27 49 n Paper Out Sensor Off ESC 8 27 56 Paper Out Sensor On [...]

ML620/ML621 User’s Guide 95 Oki MICROLINE Standard Commands Oki Command ASCII Decimal Backspace BS 8 Carriage Return CR 13 Character Pitch Select 10 cpi RS 30 Select 12 cpi FS 28 Select 15 cpi ESC g 27 103 Select 17.1 cpi GS 29 Select 20 cpi ESC # 3 27 35 51 Character Sets Standard ESC ! 0 27 33 48 Block Graphic ESC ! 1 27 33 49 Line Graphics ESC[...]

ML620/ML621 User’s Guide 96 Oki MICROLINE Standard Commands (continued) Oki Command ASCII Decimal Paper Out Sensor Off ESC E 1 27 69 49 Paper Out Sensor On ESC E 0 27 69 48 Print Quality Select HSD/SSD ESC # 0 27 35 48 Select NLQ Courier ESC 1 27 49 Select NLQ Gothic ESC 3 27 51 Select Utility ESC 0 27 48 Print Speed, Set to Full ESC > 27 62 P[...]

ML620/ML621 User’s Guide 97 Appendix C: Specications Note: Specications are subject to change without notice. Print Method Impact dot matrix Printhead 18 pins, 0.30 mm (0.012”) diameter , with thermal protection Interfaces Standard : Bi-directional parallel, IEEE-1284 compliant, USB 2.0 Optional : RS-232C Serial Receive Buffer Size Maximu[...]

ML620/ML621 User’s Guide 98 Print Speed Print Mode Character Pitch 10 cpi 12 cpi 15 cpi 17. 1 cpi 20 cpi SSD — 70 0 cps — — — HSD 600 c ps 600 cps 600 cps 60 0 cp s 600 c ps Uti lity 45 0 cp s 450 c ps 450 cps 431 cps 45 0 cp s NLQ 113 c ps 113 cps 113 cps 10 8 cp s 108 c ps * cps = Characters P er Second Characters per Line (cpl) Setting[...]