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Oki ML620 User Manual Download Page 76

ML620/ML621 User’s Guide 

Printer Interior

WARNING! 

Allow the printhead to cool before cleaning 

inside the printer. To avoid any risk of fire 

or electric shock, do not use any flammable 

solvents for cleaning the printer.

You should clean the printer housing every six 

months (or after about 300 hours of operation).

Use the platen knob to back the paper out of the 

printer.

CAUTION!

Make sure the printer is turned off before you open the 

access cover.

Open the access cover and remove the pull-up 

roller assembly.
Use a clean, dry cloth to dust around the carriage 

shaft and platen. Remove any loose bits of paper.
Reinstall the pull-up roller assembly and close the 

access cover.

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Summary of Contents for ML620

Page 1: ...User s Guide 59320101 my okidata com RT322 ML620 ML621...

Page 2: ...in this guide will not affect the applicability of the information in it Mention of software products manufactured by other companies does not necessarily constitute endorsement by Oki Data Copyright...

Page 3: ...To print the Menu 27 To use the TEAR key 27 Setting Top of Form TOF 28 Temporarily Changing the Top of Form Position 29 Resetting Top of Form to the Factory Default 29 Forms Tear Off Feature 30 Potent...

Page 4: ...larm 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 9...

Page 5: ...ode 113 cps Super Speed Draft SSD Mode 700 cps 12 CPI only This rugged dual 9 pin printer can meet the needs of harsh and demanding environments Five methods of loading paper and printing Continuous F...

Page 6: ...r s Guide Parts Identification Front View Sheet Guide Rear Paper Type Lever Platen Knob Sheet Guide Front open to fit the front feed paper tray or the tractor Control Panel On Off Switch Access Cover...

Page 7: ...Network connector Ventilation Power Connector Optional Cut Sheet Feeder Roll Paper Stand connector Note The serial number of your printer is on a label on the back beside S N 1 Parts Identification In...

Page 8: ...s above these key labels show which option in the list is active For example if both of the CHR PITCH lights are lit then 15 CPI is the current character pitch if both lights are flashing then PROP pr...

Page 9: ...l alarm head space feed When flashing together with the TEAR light indicates high temperature alarm status SEL Select Green ON Printer is online ready to receive data and print OFF Printer is offline...

Page 10: ...paper park eject jam Indicates paper loading jam Indicates incorrect media setting ON LED 3 LED 2 LED 2 and 3 LED 1 LED 1 and 3 LED 1 and 2 Indicates SSD is selected Indicates HSD is selected Indicat...

Page 11: ...flashing 10 CPI is selected 12 CPI is selected 15 CPI is selected Flashing LED 2 LED 1 LED 1 and 2 Without ALARM light flashing 17 CPI is selected 20 CPI is selected PROP Proportional is selected PRI...

Page 12: ...AD EJECT On line Off line When no paper loaded performs a paper load When paper is loaded Continuous forms Retracts the form to the Pin Tractor i e reverses and moves paper out of the printer Cut shee...

Page 13: ...cts a Menu configuration LOAD EJECT SEL On line Off line Performs a forward line feed of 1 144 when paper is loaded LOAD EJECT LF FF On line Off line Performs a reverse line feed of 1 144 when paper i...

Page 14: ...uding Loading Continuous Forms Paper Rear Feed Front Feed Bottom Feed optional pull tractor Managing Continuous Forms Paper Tearing Off Continuous Forms Paper Aligning the Tear Off Perforations Removi...

Page 15: ...ntinuous 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 is close to and parallel with the edge of the surface a...

Page 16: ...eed Make sure the printer is turned ON Make sure the Paper Type lever is in the REAR feed position Open the access cover 1 and set the Paper Thickness lever to suit the paper Close the cover 1 Rear Fe...

Page 17: ...he tractors 1 NOTE If the tractor assembly is in the front of the printer open the front access door grab the finger guides 2 on each side and pinch them together to release the guide Remove it from t...

Page 18: ...paper holes engaged on either pin the same If you don t the paper will skew and jam Close the right tractor cover Adjust the left tractor until the holes in the paper are centered on the pins then loc...

Page 19: ...L620 ML621 User s Guide 19 Front Feed 1 Lock Lever 2 Upper Tractor Cover 3 Pins Make sure the Paper Type lever is in the FRONT feed position Pull down the door to open the front sheet guide 1 1 1 2 3...

Page 20: ...k it in place then move the right tractor to fit the width of the paper Open the tractor covers and place continuous forms paper on the first two pins of either tractor then close the left tractor cov...

Page 21: ...sed Move the paper guide to midway between the left and right Pin Tractors Open the left and right Pin Tractor covers and feed the continuous forms in the direction of the arrow locating the sprocket...

Page 22: ...e access cover Check the position of the tear off perforations relative to the paper cutter Adjust to the desired 1 1 tear off position using the 1 144 line feeds LF To move the form forward press and...

Page 23: ...s described in Removing Continuous Forms Paper Make sure that the Pin Tractor covers are closed to avoid the possibility of paper jams Place the Paper Type lever in the cut sheet position To load the...

Page 24: ...aligned with the Paper Guide 1 carefully insert the paper on the Paper Tray 2 and into the printer until it is gripped To advance the paper in small steps press LF FF NOTES Make sure that the paper i...

Page 25: ...n printing envelopes be sure to adjust the Paper Thickness Lever to include the thickness of the overlapped and glue parts of the envelope that is the maximum thickness If the Paper Thickness Lever is...

Page 26: ...sets the print start position for the printer It is adjustable in increments of 1 144 of an inch The first line prints at the default top of form Top of Form TOF and Forms Tear Off Note Your software...

Page 27: ...r Off menu setting Print the Menu Use the TEAR key To print the Menu Make sure paper is loaded Press the SEL key 1 Hold down the CHR PITCH 2 key and press the PRINT SPEED key 3 Press the PRINT QUALITY...

Page 28: ...as follows To set the TOF lower the first line of print on the page moves down press and hold down the LOAD EJECT and SEL keys at the same time To set the TOF higher the first line of print on the pag...

Page 29: ...rn the printer off Press and hold LF FF TEAR while turning on the printer Reload paper 1 Temporarily Changing the Top of Form Position Important Do not use the platen knob to change the Top of Form If...

Page 30: ...r Off automatically moves the paper to align the perforation with the tear bar located under the access cover after the time interval which you selected through the menu Paper remains in the tear off...

Page 31: ...l Form Tear Off appears in the second column Rear Feed Form Tear Off Manual Press SET until the time interval you wish to select appears in the third column Rear Feed Form Tear Off 1 Sec 1 Hold down t...

Page 32: ...Release Lever to the Cut Sheet position Load the cut sheet of paper To activate the continuous form paper again Remove cut sheet paper from the printer Move the paper Release Lever to Continuous Press...

Page 33: ...ickness lever for overall thickness as show below Overall Paper Thickness Lever Position 0 06 0 10 mm 1 0 11 0 15 mm 2 0 16 0 20 mm 3 0 21 0 25 mm 4 0 26 0 30 mm 5 0 31 0 35 mm 6 0 36 0 40 mm 7 0 41 0...

Page 34: ...621 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 c...

Page 35: ...thic typeface only NLQ Near Letter Quality Highest quality slowest speed 95 cps Courier or Gothic Note Available Print Quality settings depend on which Character Pitch setting is selected There are th...

Page 36: ...ally overridden when the SI command is received from your software Character pitch determines how many characters will print on each line You can choose a specific fixed width for each character in ch...

Page 37: ...ey changes until all the options have been cycled through Printer Reset Clearing some error conditions requires that you reset re initialize the printer To do this Press and release SEL to take the pr...

Page 38: ...per 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 emulation...

Page 39: ...rameters The changes you make in the Menu Mode are automatically saved when you exit the Menu Mode and are retained even when you turn the printer off See the Menu Settings Table for a complete list o...

Page 40: ...next Item menu is printed When the item you want to change is displayed use the SET key to cycle through that item s options Menu Mode Keys and Functions Key Function SET A SET is a value setting for...

Page 41: ...hold down the TEAR key and then press the SEL key again to put the printer online 1 Entering and Exiting Menu Mode To activate Menu Mode Press the SEL key to take the printer offline the SEL light wil...

Page 42: ...T SPEED key Press the PRINT QUALITY key 1 1 Changing the Menu Settings 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 set...

Page 43: ...l Emulation Mode Selects the printer command set emulation you want to engage IBM PPR Epson FX ML Font Print Mode Choose the quality and typeface of printing Switch to NLQ Courier or NLQ Gothic for Ne...

Page 44: ...code table The default is Set II Use Set I for Epson and IBM emulations only For MICROLINE emulations use Standard Line Graphics or Block Graphics Set I Set II Standard Line Graphics Block Graphics ML...

Page 45: ...oatic II ECMA 94 Hungarian CWI Windows Greek Windows East Europe Windows Cyrillic East Europe Latin II 852 Cyrillic I 855 Cyrillic II 866 Kamenicky MJK ISO Latin 2 Hebrew NC 862 Hebrew OC Turkey_857 L...

Page 46: ...en data is received paper is moved to its original printing position Manual 0 5 sec 1 sec 2 sec Skip Over Perforation Specify whether to skip over perforations or not When a skip over command is recei...

Page 47: ...5 215 9 mm 11 279 4 mm 11 7 296 3 mm 12 304 8 mm 14 355 6 mm 17 431 8 mm Initial Position Paper position print or cut when printer is powered on Print position Cut position Cut Position Adjust Specif...

Page 48: ...Line Feed Adjust For continuous feed adjusts the line feed to the specified amount 2 1 0 1 2 Centering Position Used to limit printhead travel when printing narrow columns Select Mode 1 for ML620 Sele...

Page 49: ...inter to go to the next page when it comes within 1 25 mm of the bottom of the page change the setting No 25 4 mm 1 Page Width 4 only displayed for ML621 Change to 8 to print on narrow paper 13 6 8 Pa...

Page 50: ...a continuous form The position moves to the bottom edge of the page and to the top edge of the page in 1 144 increments 20 1 0 1 20 Continuous Paper Top of Form For continuous forms sets a TOF in sma...

Page 51: ...Spacing Change to 8 lines per inch lpi to get more lines on a page 6 LPI 8 LPI Skip Over Perforation Specify whether to skip over perforations or not When a skip over command is received it is given...

Page 52: ...adjusts the line feed to the specified amount 2 1 0 1 2 Centering Position Used to limit printhead travel when printing narrow columns Select Mode 1 for ML620 Select Mode 1 or Mode 2 for the ML621 De...

Page 53: ...203 2 mm 8 5 215 9 mm 11 279 4 mm 11 7 296 3 mm 12 304 8 mm 14 355 6 mm 17 431 8 mm Initial Position 6 Displayed when connected to RPS Paper position print or cut when printer is powered on Print pos...

Page 54: ...on for the Top of Form position The position moves to the bottom edge of the page and to the top edge of the page in 1 144 increments 20 1 0 1 20 Cut Sheet Top of Form Specify an adjustment value for...

Page 55: ...8 lines per inch lpi to get more lines on a page 6 LPI 8 LPI 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...

Page 56: ...the bottom of the page it ejects the paper 25 6 35 mm 5 12 7 mm 7 12 14 82 mm Invalid TOF Adjust Specify an adjustment value for the reference position for the Top of Form position The position moves...

Page 57: ...uble height print data Specify uni directional graphics for better registration but slower printing Bi directional Uni directional 7 or 8 Bit Graphics 7 only displayed for ML Emulation Change this set...

Page 58: ...in the reverse direction The position moves to the right or left in 1 720 increments 10 1 0 1 10 Print Registration 3 Adjust the print starting position on printing in the reverse direction The positi...

Page 59: ...set to Yes No Yes Print Suppress Effective Set whether to enable or disable a print suppress setup command No Yes Auto LF Set whether to perform automatic line feed operation or not upon receiving a C...

Page 60: ...e printer control panel is set for 12 cpi and the SI command is received 12 cpi 20 cpi Time Out Print If your software spends a long time processing between portions of data it feeds to the printer ch...

Page 61: ...displayed for IBM Emulation Sets the character pitch used when the ESC SI command is received 17 1 cpi 20 cpi Select Language Set9 only displayed for EPSON Emulation Select combined to set both countr...

Page 62: ...ad only moves from left to right in bi directional printing the print head moves in both directions Uni directional Bi directional Sleep Mode Default setting saves power by having the printer go into...

Page 63: ...paper to the top cover to see the Menu printing set to Yes No Yes Parallel I F I Prime Determines what the printer will do when it receives the I Prime signal from the software Buffer Print prints ou...

Page 64: ...en the optional Serial Interface is installed Parity Selects the type of parity your system uses None Odd or Even Ignore do not convert the character to ox40 in case of parity error None Odd Even Igno...

Page 65: ...signal Valid Invalid DTR Signal Change to Ready on Select if the DTR signal is required when the printer is selected leave as Ready on Power Up if the DTR signal is required when the printer is turned...

Page 66: ...he initial printing position TOF on each page 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 8 mm 8 203 2 mm 8 5 215 9 mm 11 279 4 mm 1...

Page 67: ...Top of Form LF Revise Adjust the line feed in cut sheet mode 14 1 0 1 14 Centering Position Used to limit printhead travel when printing narrow columns Select Mode 1 for ML620 Select Mode 1 or Mode 2...

Page 68: ...er size is set to 8K bytes 3 When Limited Operation is selected after exiting MENU only 4 Displayed only for ML621 5 With Form Tear Off function on if the printer is idle for a few moments approximate...

Page 69: ...d ribbon cartridges in their packages until needed Careful the ribbon ink may cause permanent stains Ribbon ink on skin or clothing can usually be removed with soap and water Make sure the printer is...

Page 70: ...arrows insert the pins at both ends of the ribbon cartridge 1 into the U grooves 2 in the printer until the ribbon cartridge is fully locked NOTE It may be easier to mount the ribbon cartridge in pla...

Page 71: ...d to the end of the printhead Move the printhead horizontally to make sure that the ribbon is properly installed Turn the take up knob in the direction of the arrow to take up any ribbon slack CAUTION...

Page 72: ...more information See the Material Safety Data Sheet in your Warranty Regulatory and Safety Information booklet Clearing Paper Jams Continuous Feed Paper Jams WARNING Do not carry out any operations i...

Page 73: ...front of the printer If a form fragment remains inside the printer place two or three forms in a stack on the Pin Tractors and turn the platen knob to push the fragment out of the printer When the pap...

Page 74: ...rinthead may be HOT Remove the ribbon cartridge See Replacing the Ribbon Cartridge 1 Move the printhead away from the paper Rotate the platen knob in the relevant direction and pull the cut sheet out...

Page 75: ...FF and disconnect the power cable from the printer before cleaning Printer Exterior CAUTION Keep the access cover closed to avoid the possibility of detergent entering the printer You should clean the...

Page 76: ...the printer housing every six months or after about 300 hours of operation Use the platen knob to back the paper out of the printer CAUTION Make sure the printer is turned off before you open the acc...

Page 77: ...ter 4 Menu Mode for more information The Font Sample Test prints a sample of the fonts standard to the printer The top of the printout shows the Printer Model Emulation Microline Epson IBM compatible...

Page 78: ...96 ASCII characters in a rolling pattern in whatever typeface is selected default LQ Courier The top of the printout shows the Printer Model Emulation Microline Epson IBM compatible Firmware F W Revi...

Page 79: ...CHR 27 0 CHR 30 This is an example of a hexadecimal dump would print like this Note In the ASCII format all non printable characters are represented by a period To engage the Hexadecimal Dump Mode Mak...

Page 80: ...the proper ambient conditions Does the paper being used meet the specifications for this product Is the paper properly installed Is the ribbon properly installed Is an Oki ribbon being used Is the pr...

Page 81: ...ectly for the type of paper in use Press the SEL key and move the Paper Type lever to the correct setting OFF Flashing Problem with cut sheet feeding Remove the cut sheet Flashing ON Print data is rec...

Page 82: ...tly The printer has just stopped printing Press the SEL key There is no paper in the printer Load paper SEL indicator is illuminated but no printing takes place Interface cable is disconnected Reconne...

Page 83: ...Correct the Paper Thickness lever setting The printer is set to print at high speed Set the speed to normal The ribbon has reached its end of life Replace the ribbon with a new one The ribbon cartrid...

Page 84: ...ons of the Paper Guide or Pin Tractors Select and adjust the position again depending on the paper type Reselect the left and right margins correctly in the application When continuous forms are used...

Page 85: ...uble height type or other extended types A paper feed error due to line feeding when printing a single character Use the printer s built in fonts when printing important documents or bills Improper cu...

Page 86: ...r from the printer Move the paper source nearer to the printer Paper not specified for the printer Use paper types specified for this printer Several blank lines appear in the print out Skip over perf...

Page 87: ...ML620 ML621 User s Guide 87 PROBLEM CAUSE SOLUTION Paper feed operations for both cut sheets and continuos forms are actuated The cut sheet is not ejected Eject the cut sheet...

Page 88: ...dealer where your purchased your printer Locate an Authorized Oki Data Reseller by visiting one of our web sites http my okidata com allows you to register your product and personalize your own suppor...

Page 89: ...Number Model ML620 Tractor Assembly Pull 44753901 Tractor Assembly Push 44454901 Cut Sheet Feeder 44497401 Model ML621 Tractor Assembly Pull 44754001 Tractor Assembly Push 44455001 Cut Sheet Feeder 4...

Page 90: ...rint SI 15 Character Sets IBM Set I ESC 7 27 55 IBM Set II ESC 6 27 54 Appendix B Printer Control Codes This section lists the most commonly used printer control codes You will find a comprehensive li...

Page 91: ...ESC C n 27 67 n Horizontal Tab Execute HT 9 Italics On ESC G 27 37 71 Italics Off ESC H 27 37 72 IBM Command ASCII Decimal Line Feed Execute w Carriage Return LF 10 n 144 n 1 to 127 ESC 5 n 27 37 53 n...

Page 92: ...ML621 ESC Q SYN 27 81 22 Print Suppress Mode Off DC1 17 Proportional Spacing On ESC P 1 27 80 49 Proportional Spacing Off ESC P 0 27 80 48 Reset Clear Print Buffer CAN 24 IBM Command ASCII Decimal Sof...

Page 93: ...ed Print Off ESC F 27 70 Enhanced Print On ESC G 27 71 Enhanced Print Off ESC H 27 72 Epson Set 1 Select ESC t 0 27 116 48 Epson Set 2 Select ESC t 1 27 116 49 Epson Command ASCII Decimal Italic Print...

Page 94: ...107 49 Select Draft ESC x 0 27 120 48 Print Speed Epson Command ASCII Decimal Half Speed On ESC s 1 27 115 49 Half Speed Off ESC s 0 27 115 48 Print Suppress Mode On DC3 19 Print Suppress Mode Off DC...

Page 95: ...ouble Height Off ESC US 0 27 31 48 Double Width Printing US 31 Oki Command ASCII Decimal Emphasized Printing On ESC T 27 84 Emphasized Printing Off ESC I 27 73 Enhanced Printing On ESC H 27 72 Enhance...

Page 96: ...to Half ESC 27 60 Print Suppress On DC3 19 Print Suppress Off DC1 17 Proportional Printing On ESC Y 27 89 Off ESC Z 27 90 Reset Clear Print Buffer CAN 24 Shift In SI 15 Shift Out SO 14 Software I Prim...

Page 97: ...28K Printhead Life 400 million characters average in 10 cpi utility mode at 25 duty and 35 page density Reliability Ribbon Life ML620 approx 8 million characters Utility Mode ML621 approx 13 million c...

Page 98: ...ML620 ML621 10 cpi 80 cpl 136 cpl 12 cpi 96 cpl 163 cpl 15 cpi 120 cpl 204 cpl 17 1 cpi 137 cpl 233 cpl 20 cpi 160 cpl 272 cpl Graphics Resolution Emulation Density Max Resolution Dots per inch IBM E...

Page 99: ...ature Operating 41 to 95 F 5 to 35 C Storage 14 to 122 F 10 to 50 C Humidity Operating 20 to 80 RH Storage 5 to 95 RH Electrical Requirements 120 V model 100 VAC 10 to 127 VAC 10 50 or 60 Hz 2 Power C...

Page 100: ...0049 0 05 0 12 mm Multi part weight 35 40 g m2 Multi part Thickness 0 015 0 36 mm total thickness 0 019 0 48 mm total thickness bottom path only Paper Size Carbon lined Paper Pressure Sensitive Paper...

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