Users Guide
Page 3
... Printer Features 5 Oki Data on the Internet 5 Parts Identification: Front View 6 Parts Identification: Rear View 7 Parts Identification: Inside View 7 The Control Panel 8 Print Mode Key Functions 12 Chapter 2: Paper Handling 14 Loading Continuous Forms Paper 15 Rear Feed 16 Front Feed 19 Bottom Feed (optional pull tractor 21 Tearing Off Continuous Forms Paper 22 Aligning the Tear-Off Perforations 22 Removing Continuous Forms Paper 22 Loading Cut Sheet Paper 23 Cut Sheet Paper, Top and Front Feed 23 Ejecting Cut Sheet Paper 25 Notes on Different Types of Paper 25 Top of Form...
... Printer Features 5 Oki Data on the Internet 5 Parts Identification: Front View 6 Parts Identification: Rear View 7 Parts Identification: Inside View 7 The Control Panel 8 Print Mode Key Functions 12 Chapter 2: Paper Handling 14 Loading Continuous Forms Paper 15 Rear Feed 16 Front Feed 19 Bottom Feed (optional pull tractor 21 Tearing Off Continuous Forms Paper 22 Aligning the Tear-Off Perforations 22 Removing Continuous Forms Paper 22 Loading Cut Sheet Paper 23 Cut Sheet Paper, Top and Front Feed 23 Ejecting Cut Sheet Paper 25 Notes on Different Types of Paper 25 Top of Form...
Users Guide
Page 4
... Clearing Paper Jams 72 Continuous Feed Paper Jams 72 Cut Sheet Paper Jams 74 Cleaning the Printer 75 Printer Exterior 75 Printer Interior 76 Testing the Printer 77 Font Sample Test 77 Rolling ASCII Test 78 Hexadecimal Dump Mode 79 Chapter 6: Troubleshooting 80 General Information 80 Responding to Alarm Conditions 81 Problems / Solutions 82 Appendix A: Parts & Accessories 88 Purchasing Parts & Accessories 88 Consumables 89 Accessories 89 Appendix B: Printer Control Codes 90 IBM Proprinter III Commands 90 Epson FX Commands 93 Oki MICROLINE Standard Commands...
... Clearing Paper Jams 72 Continuous Feed Paper Jams 72 Cut Sheet Paper Jams 74 Cleaning the Printer 75 Printer Exterior 75 Printer Interior 76 Testing the Printer 77 Font Sample Test 77 Rolling ASCII Test 78 Hexadecimal Dump Mode 79 Chapter 6: Troubleshooting 80 General Information 80 Responding to Alarm Conditions 81 Problems / Solutions 82 Appendix A: Parts & Accessories 88 Purchasing Parts & Accessories 88 Consumables 89 Accessories 89 Appendix B: Printer Control Codes 90 IBM Proprinter III Commands 90 Epson FX Commands 93 Oki MICROLINE Standard Commands...
Users Guide
Page 5
... methods of loading paper and printing: Continuous Forms Rear Feed (Push), Continuous Forms Front Feed (Push), Continuous Forms Bottom Feed (Pull), Cut Sheet (Top), Cut Sheet (Front) Oki Data on the Internet The Oki Data Web Sites provide the most current information available on your printer. Chapter 1: Introduction Printer Features Super reliable, durable operation: 25,000 hours Mean Time Between Failures (MTBF) at : www.okiprintingsolutions.com my.okidata.com ML620/ML621 User's Guide
... methods of loading paper and printing: Continuous Forms Rear Feed (Push), Continuous Forms Front Feed (Push), Continuous Forms Bottom Feed (Pull), Cut Sheet (Top), Cut Sheet (Front) Oki Data on the Internet The Oki Data Web Sites provide the most current information available on your printer. Chapter 1: Introduction Printer Features Super reliable, durable operation: 25,000 hours Mean Time Between Failures (MTBF) at : www.okiprintingsolutions.com my.okidata.com ML620/ML621 User's Guide
Users Guide
Page 18
... the tractor covers. . You must keep the number of Form (TOF)". If you are centered on the pins then lock the lever and close the lock lever on the right tractor. 2 1 . Adjust the left tractor until the marks align. 1. Press and hold the LOAD/EJECT key to the reference mark (2) matching the width of the page. To change the setting, see "Top of paper holes engaged on the first two pins...
... the tractor covers. . You must keep the number of Form (TOF)". If you are centered on the pins then lock the lever and close the lock lever on the right tractor. 2 1 . Adjust the left tractor until the marks align. 1. Press and hold the LOAD/EJECT key to the reference mark (2) matching the width of the page. To change the setting, see "Top of paper holes engaged on the first two pins...
Users Guide
Page 21
Remove the access cover. . Place the paper through the slot in the base of the continuous forms to accommodate the width of the printer. . Lift the locking lever of skew printing, irregular line feeding and paper jam. 11. Lift the locking lever of the right pin tractor and slide the Pin Tractor to the required position to be inconsistent. NOTE: Make sure that the forms are properly aligned on a slotted printer stand, carefully aligning the slot...
Remove the access cover. . Place the paper through the slot in the base of the continuous forms to accommodate the width of the printer. . Lift the locking lever of skew printing, irregular line feeding and paper jam. 11. Lift the locking lever of the right pin tractor and slide the Pin Tractor to the required position to be inconsistent. NOTE: Make sure that the forms are properly aligned on a slotted printer stand, carefully aligning the slot...
Users Guide
Page 22
... paper cutter on the access cover. . When data is received by the printer or when the SEL key is pressed to select the printer, the continuous forms is pressed to the tear-off perforations in the direction shown. . Press the LOAD/EJECT key to the first line print position. NOTE: The printer switches to indicate that there is no paper present. NOTE: If the TOF position shifts because of a paper jam. . Carefully tear...
... paper cutter on the access cover. . When data is received by the printer or when the SEL key is pressed to select the printer, the continuous forms is pressed to the tear-off perforations in the direction shown. . Press the LOAD/EJECT key to the first line print position. NOTE: The printer switches to indicate that there is no paper present. NOTE: If the TOF position shifts because of a paper jam. . Carefully tear...
Users Guide
Page 23
... the Pin Tractor covers are two methods of loading single sheets of cut sheet position: . Set the left margin of the paper by adjusting the appropriate Paper Guides (1) along the scale (2) relative to avoid the possibility of paper jams. . To load the cut sheet in the Top Feed Paper tray, raise the top tray. Make sure the printer is any continuous forms paper in the printer, eject it as described in the cut sheet paper, top feed and front feed. To load the cut sheet...
... the Pin Tractor covers are two methods of loading single sheets of cut sheet position: . Set the left margin of the paper by adjusting the appropriate Paper Guides (1) along the scale (2) relative to avoid the possibility of paper jams. . To load the cut sheet in the Top Feed Paper tray, raise the top tray. Make sure the printer is any continuous forms paper in the printer, eject it as described in the cut sheet paper, top feed and front feed. To load the cut sheet...
Users Guide
Page 25
... cause jams. Do not use labels on very narrow paper (e.g., three inches), change the Centering position can absorb marks from the paper feed roller or from where it automatically ejects the page. if the adhesive is , the maximum thickness. If required, add another sheet for the thinnest part of the envelope the print density may slip causing erratic line spacing. Seal-type cards: Test...
... cause jams. Do not use labels on very narrow paper (e.g., three inches), change the Centering position can absorb marks from the paper feed roller or from where it automatically ejects the page. if the adhesive is , the maximum thickness. If required, add another sheet for the thinnest part of the envelope the print density may slip causing erratic line spacing. Seal-type cards: Test...
Users Guide
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.../ML621 User's Guide 26 Top of form. The Top of Form and Forms Tear-Off settings of Form (TOF) and Forms Tear-Off Note: Your software may need to adjust the TOF to 500 ms, 1 sec, or 2 sec) or OFF (the factory default setting). Always shut the printer off before turning the platen knob. Top of your software's requirements. How you turn the platen knob when the printer is adjustable in increments of 1/144 of print...
.../ML621 User's Guide 26 Top of form. The Top of Form and Forms Tear-Off settings of Form (TOF) and Forms Tear-Off Note: Your software may need to adjust the TOF to 500 ms, 1 sec, or 2 sec) or OFF (the factory default setting). Always shut the printer off before turning the platen knob. Top of your software's requirements. How you turn the platen knob when the printer is adjustable in increments of 1/144 of print...
Users Guide
Page 46
.... If your software has its original printing position. To set in bold italic) Specify manual form paper advancement or select a time; When a skipover command is received, it comes within 1" (25 mm) of the bottom of the page, change the setting. Manual, 0.5 sec, 1 sec, 2 sec Specify whether to print on narrow paper. 13.6", 8" ML620/ML621 User's Guide 46 MENU SETTINGS TABLE Group Rear Feed (Push) Item Form Tear-Off 5 (cont.) Skip Over Perforation Page Width 4 (only displayed...
.... If your software has its original printing position. To set in bold italic) Specify manual form paper advancement or select a time; When a skipover command is received, it comes within 1" (25 mm) of the bottom of the page, change the setting. Manual, 0.5 sec, 1 sec, 2 sec Specify whether to print on narrow paper. 13.6", 8" ML620/ML621 User's Guide 46 MENU SETTINGS TABLE Group Rear Feed (Push) Item Form Tear-Off 5 (cont.) Skip Over Perforation Page Width 4 (only displayed...
Users Guide
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... ML620/ML621 User's Guide 52 Select Mode 1 or Mode 2 for ML620. MENU SETTINGS TABLE Group Item Pull Page Length (cont.) LF Revise (Continuous Paper Line Feed Adjust) Centering Position Cut Sheet Top Feed Line Spacing Form Tear-Off 5, 6 (Displayed when connected to the specified amount. Select Mode 1 for the ML621. For continuous feed, adjusts the line feed to RPS) Function Specify the length of a continuous form. when printer is idle for .5, 1 or 2 seconds, paper is moved to the tear position. When data is received, paper is advanced...
... ML620/ML621 User's Guide 52 Select Mode 1 or Mode 2 for ML620. MENU SETTINGS TABLE Group Item Pull Page Length (cont.) LF Revise (Continuous Paper Line Feed Adjust) Centering Position Cut Sheet Top Feed Line Spacing Form Tear-Off 5, 6 (Displayed when connected to the specified amount. Select Mode 1 for the ML621. For continuous feed, adjusts the line feed to RPS) Function Specify the length of a continuous form. when printer is idle for .5, 1 or 2 seconds, paper is moved to the tear position. When data is received, paper is advanced...
Users Guide
Page 59
... User's Guide 59 MENU SETTINGS TABLE Group Set-Up (cont.) Item Operator Panel Function 3 Function Set control panel operation. Settings (defaults are set in bold italic) Full Operation, Limited Operation Reset Inhibit To prevent a reset signal from the computer from resetting the printer to its defaults, set to Yes. if it overprints, select Yes. Limited operation locks functions on the control panel; No, Yes To print the DEL code (decimal 27) No, Yes as a solid box, set to Yes. only SEL, LOAD/EJECT, and TEAR...
... User's Guide 59 MENU SETTINGS TABLE Group Set-Up (cont.) Item Operator Panel Function 3 Function Set control panel operation. Settings (defaults are set in bold italic) Full Operation, Limited Operation Reset Inhibit To prevent a reset signal from the computer from resetting the printer to its defaults, set to Yes. if it overprints, select Yes. Limited operation locks functions on the control panel; No, Yes To print the DEL code (decimal 27) No, Yes as a solid box, set to Yes. only SEL, LOAD/EJECT, and TEAR...
Users Guide
Page 60
... Emulation) Time Out Print Auto Select Function Settings (defaults are set in paper. When set to be engaged when 15 cpi, 17.1 cpi the printer control panel is received. Sets the pitch to keep the default setting of data it is waiting for 10 cpi and the SI command is set the Top of Form. If you always use the same Top of Form position, keep your software spends a long time processing between portions of "Yes". If your printer from dumping...
... Emulation) Time Out Print Auto Select Function Settings (defaults are set in paper. When set to be engaged when 15 cpi, 17.1 cpi the printer control panel is received. Sets the pitch to keep the default setting of data it is waiting for 10 cpi and the SI command is set the Top of Form. If you always use the same Top of Form position, keep your software spends a long time processing between portions of "Yes". If your printer from dumping...
Users Guide
Page 61
... 17.1 cpi, 20 cpi Combined, Code Page Only Normal, High Speed, Quiet, High Copy Mode1, Mode2 Mode1, Mode2, Mode3, Mode4 ML620/ML621 User's Guide 61 Settings (defaults are set both country and language; select "code page only" for EPSON Emulation) Print Style Select Quiet Mode Select High Copy Mode Function Set which interface the printer uses to idle status when no printing commands have been received. Sets the length of time before the interface switches to receive printing commands. Sets the character pitch used when the...
... 17.1 cpi, 20 cpi Combined, Code Page Only Normal, High Speed, Quiet, High Copy Mode1, Mode2 Mode1, Mode2, Mode3, Mode4 ML620/ML621 User's Guide 61 Settings (defaults are set both country and language; select "code page only" for EPSON Emulation) Print Style Select Quiet Mode Select High Copy Mode Function Set which interface the printer uses to idle status when no printing commands have been received. Sets the length of time before the interface switches to receive printing commands. Sets the character pitch used when the...
Users Guide
Page 68
... printer, the paper is then automatically reversed feed back to the tear bar position. If more data is received and processed by -column. ML620/ML621 User's Guide 68 MENU SETTINGS TABLE Group Item Extension Right Margin (Cut Sheet) (cont.) Function If the printer data exceeds the width of the paper. Specify a margin from the current position, to the original printing position. 6 Displayed only when the roll paper stand (RPS) is connected. 7 Displayed only for ML emulation...
... printer, the paper is then automatically reversed feed back to the tear bar position. If more data is received and processed by -column. ML620/ML621 User's Guide 68 MENU SETTINGS TABLE Group Item Extension Right Margin (Cut Sheet) (cont.) Function If the printer data exceeds the width of the paper. Specify a margin from the current position, to the original printing position. 6 Displayed only when the roll paper stand (RPS) is connected. 7 Displayed only for ML emulation...
Users Guide
Page 81
..., then turn the power ON again. If the indicator lights continue to the correct setting. ML620/ML621 User's Guide 81 Add paper and press the SEL key. Responding to Alarm Conditions Use the following table for the type of paper in use. The Paper Type lever is being fed. Problem with cut sheet. Printing cannot be resumed at this stage. Remove the cut sheet feeding. INDICATOR SEL ALARM OFF ON OFF Flashing OFF Flashing Flashing ON Flashing Flashing ALARM MEANINGS...
..., then turn the power ON again. If the indicator lights continue to the correct setting. ML620/ML621 User's Guide 81 Add paper and press the SEL key. Responding to Alarm Conditions Use the following table for the type of paper in use. The Paper Type lever is being fed. Problem with cut sheet. Printing cannot be resumed at this stage. Remove the cut sheet feeding. INDICATOR SEL ALARM OFF ON OFF Flashing OFF Flashing Flashing ON Flashing Flashing ALARM MEANINGS...
Users Guide
Page 82
... power outage. Wrong interface cable attached. Use correct interface cable. PROBLEM No power No power No printing takes place SEL indicator is offset. The printer has just stopped printing. Install the ribbon cartridge. When the printer is powered on -line mode by pressing the SEL key. Problems / Solutions Use the following table to check if it works. The printer driver is properly connected at both the power outlet and the printer. Load paper Reconnect the interface cable. The start position may change after the printer is powered ON, switch from off-line mode...
... power outage. Wrong interface cable attached. Use correct interface cable. PROBLEM No power No power No printing takes place SEL indicator is offset. The printer has just stopped printing. Install the ribbon cartridge. When the printer is powered on -line mode by pressing the SEL key. Problems / Solutions Use the following table to check if it works. The printer driver is properly connected at both the power outlet and the printer. Load paper Reconnect the interface cable. The start position may change after the printer is powered ON, switch from off-line mode...
Users Guide
Page 83
... the paper. Correct the Paper Thickness lever setting. Broken wire pins. Incorrect print setup for the applications according to display properly on the carriage shaft. Replace the ribbon cartridge with a new one . The application control codes for the previous print operation are too pale to priority. PROBLEM Printing slows down CAUSE SOLUTION Print direction changes suddenly to normal. The ribbon has been wound incorrectly. A line of -life. ML620/ML621 User's Guide...
... the paper. Correct the Paper Thickness lever setting. Broken wire pins. Incorrect print setup for the applications according to display properly on the carriage shaft. Replace the ribbon cartridge with a new one . The application control codes for the previous print operation are too pale to priority. PROBLEM Printing slows down CAUSE SOLUTION Print direction changes suddenly to normal. The ribbon has been wound incorrectly. A line of -life. ML620/ML621 User's Guide...
Users Guide
Page 85
.... Use paper types specified for the printer. Split print Blanks or deformed characters A paper feed error due to eject. Adjust the Print Registration. Load sheets to the end. Tear-off perforation spacing is not set correctly. Line spacing is selected. Improper cut sheet mode. Continuous forms instead of a single line is in the application. The printer is The left and/or right margins are fed. The LF/FF key was pressed. ML620/ML621 User's Guide 85 Paper not specified for the printer. Cancel tear...
.... Use paper types specified for the printer. Split print Blanks or deformed characters A paper feed error due to eject. Adjust the Print Registration. Load sheets to the end. Tear-off perforation spacing is not set correctly. Line spacing is selected. Improper cut sheet mode. Continuous forms instead of a single line is in the application. The printer is The left and/or right margins are fed. The LF/FF key was pressed. ML620/ML621 User's Guide 85 Paper not specified for the printer. Cancel tear...
Users Guide
Page 86
The paper length selected in the application. Set the adjust lever to cut sheet mode. Select the paper length in number of line with the right ones. Set the Paper Type lever to the correct position. Set the Paper Type lever to make it straight. ML620/ML621 User's Guide 86 Load forms with their left and right Pin Tractors, making for loose paper. Move the paper to continuous forms mode. Cancel the skip-over perforation spacing does not match the physical tear-off the Pin Tractors. Match the paper length selected in the application...
The paper length selected in the application. Set the adjust lever to cut sheet mode. Select the paper length in number of line with the right ones. Set the Paper Type lever to the correct position. Set the Paper Type lever to make it straight. ML620/ML621 User's Guide 86 Load forms with their left and right Pin Tractors, making for loose paper. Move the paper to continuous forms mode. Cancel the skip-over perforation spacing does not match the physical tear-off the Pin Tractors. Match the paper length selected in the application...