Oki ML690 User Manual Download Page 81

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ML690/ML691 User’s Guide

Chapter :

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 meet the

specifications for this product?
Is the paper properly installed?
Is the ribbon properly installed?
Is an Oki ribbon being used?
Is the printhead gap correctly set?
Are the correct printer drivers being used for the

printer?



Note: Settings in your software application will normally

override any settings in your printer driver.

Printer driver settings normally override settings

from the printer menu or printer front panel.

Summary of Contents for ML690

Page 1: ...User s Guide 59101601 my okidata com RT322 ML690 ML691...

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: ...Off is Off or On 28 To print the Menu 28 To use the TEAR key 28 Setting Top of Form TOF 29 Temporarily Changing the Top of Form Position 30 Resetting Top of Form to the Factory Default 30 Forms Tear O...

Page 4: ...n 81 Responding to Alarm Conditions 82 Problems Solutions 83 Appendix A Parts Accessories 89 Purchasing Parts Accessories 89 Consumables 90 Accessories 90 Appendix B Printer Control Codes 91 IBM Propr...

Page 5: ...ps Letter Quality LQ Mode 120 cps This rugged 24 pin printer can meet the needs of harsh and demanding environments Five methods of loading paper and printing Continuous Forms Rear Feed Push Continuou...

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: ...D 2 and 3 LED 1 LED 1 and 3 LED 1 and 2 LED 1 2 and 3 Indicates HSD is selected Indicates DRAFT is selected Indicates COURIER is selected Indicates ROMAN is selected Indicates SWISS is selected Indica...

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 1 180 when paper is loaded LOAD EJECT LF FF On line Off line Performs a reverse line feed of 1 180 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: ...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 and at lea...

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: ...ms paper on the first two pins of either tractor Important Be sure that both sides of the paper have the same number of paper holes engaged on the sprocket pins If you don t the paper will skew and ja...

Page 19: ...down from the top of the page To change the setting see Top of Form TOF Front Feed 1 Lock Lever 2 Upper Tractor Cover 3 Pins 1 Make sure the printer is turned ON Make sure the Paper Type lever is in t...

Page 20: ...n paper sizes Move the left tractor to the position to match your paper size and push back on the lever to lock it in place then move the right tractor to fit the width of the paper Open the tractor c...

Page 21: ...tion Then press the locking lever back down to lock the Pin Tractor Lift the locking lever of the right pin tractor and slide the Pin Tractor to the required position to accommodate the width of the c...

Page 22: ...y tear off the forms along the tear off perforations in the direction shown When data is received by the printer or when the SEL key is pressed to select the printer the continuous forms is reposition...

Page 23: ...age from the sprocket pins do not attempt to eject the paper to avoid the possibility of a paper jam Lift the pin tractor covers and remove the forms Close the pin tractor covers 1 Loading Cut Sheet P...

Page 24: ...just the Paper Thickness lever 1 to suit the paper Close the cover NOTE If the Paper Thickness lever setting does not match the paper paper feeding and printing may not work properly With the printing...

Page 25: ...push it in sufficiently until it touches the feed roller to avoid the possibility of skewed printing or paper jams Ejecting Cut Sheet Paper When the printer reaches the end of the cut sheet page it a...

Page 26: ...Thickness Lever is set for the thinnest part of the envelope the print density may fluctuate Glossy paper Test paper with a glossy finish thoroughly before using A glossy surface can absorb marks from...

Page 27: ...sets the print start position for the printer It is adjustable in increments of 1 180 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 28: ...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 29: ...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 30: ...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 31: ...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 32: ...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 33: ...aper Type 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 Type lever to Continuous Press...

Page 34: ...Continuous Paper 52 81 g m2 81 128 g m2 Carbon Paper or Pressure Sensitive Paper 40 g m2 2 part 3 part 4 part 5 part 6 part 7 part Set the Paper Thickness lever for overall thickness as show below Ov...

Page 35: ...691 User s Guide 35 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 36: ...n Swiss Orator Gothic Prestige OCR A or OCR B Note Available Print Quality settings depend on which Character Pitch setting is selected There are three PRINT QUALITY indicator lights The sequence of l...

Page 37: ...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 38: ...key changes until all the options have been cycled through Printer Reset Clearing some error conditions requires that you reset reinitialize the printer To do this Press and release SEL to take the pr...

Page 39: ...tions 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 EPSON LQ Pr...

Page 40: ...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 41: ...hrough that item s options Menu Mode Keys and Functions Key Function SET A SET is a value setting for an ITEM Use the SET key to cycle forward through the options Each time SET is pressed the next Set...

Page 42: ...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 43: ...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 44: ...bold italic Printer Control Emulation Mode Selects the printer command set emulation you want to engage Epson LQ IBM PPR IBM AGM Font Print Mode Choose the quality and typeface of printing If you are...

Page 45: ...Use Set I for Epson and IBM emulations only Set I Set II Language Set Replaces certain standard symbols with special characters used in foreign languages American French German British Danish I Swedis...

Page 46: ...rian 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 Latin5 Windows Turkey W...

Page 47: ...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 48: ...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 49: ...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 ML690 Sele...

Page 50: ...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 ML691 Change to 8 to print on narrow paper 13 6 8 Pa...

Page 51: ...a continuous form The position moves to the bottom edge of the page and to the top edge of the page in 1 180 increments 30 1 0 1 30 Continuous Paper Top of Form For continuous forms sets a TOF in sma...

Page 52: ...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 53: ...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 ML690 Select Mode 1 or Mode 2 for the ML691 De...

Page 54: ...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 55: ...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 1 180 increments 30 1 0 1 30 Cut Sheet Top of Form Specify an adjustment value for...

Page 56: ...8 lines per inch lpi to get more lines on a page 6 LPI 8 LPI Page Width only displayed for ML691 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 57: ...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 58: ...p Graphics Set the printing direction when a line has double height print data Specify uni directional graphics for better registration but slower printing Bi directional Uni directional Receive Buffe...

Page 59: ...e 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 position moves to the right or le...

Page 60: ...printout is consistently double spaced select No if it overprints select Yes No Yes Auto CR 7 only displayed for IBM Emulation If you want the printer to automatically add a carriage return when a Lin...

Page 61: ...selected after you load in paper If you always use the same Top of Form position keep the default setting of Yes When set to No the printer will be deselected so that you can set the Top of Form No Y...

Page 62: ...e printer makes one pass in Mode2 two passes Mode1 Mode2 Select High Copy Mode High copy modes set the printer to print more forcefully Mode1 is a double strike print Mode2 is triple strike etc Mode1...

Page 63: ...5 min 30 min 60 min Pin Control Regulates the striking force for multi part forms For single sheets use Standard for multi part forms use Special Standard Special Pin Control Select Regulates the stri...

Page 64: ...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 out the buffer contents before resetting Buffer Clear d...

Page 65: ...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 66: ...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 67: ...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 68: ...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 ML690 Select Mode 1 or Mode 2...

Page 69: ...nd single height characters 2 When 1 line ID selected the receiving buffer size is set to 8K bytes 3 When Limited Operation is selected after exiting MENU only 4 Displayed only for ML691 5 With Form T...

Page 70: ...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 turned O...

Page 71: ...91 User s Guide 71 Swing the used ribbon cartridge up off the printhead lift it out and discard it Remove the new ribbon cartridge from its wrapping and note the position of the Ribbon Guide 1 Knob 2...

Page 72: ...shed to the end of the printhead Move the printhead horizontally to make sure that the ribbon is properly installed In the direction indicated by the arrows insert the pins at both ends of the ribbon...

Page 73: ...and the ribbon guide Set the Paper Thickness lever to match the paper being used Close the access cover and turn the printer back on CAUTION If ribbon should contact the eyes Flush eyes with large qua...

Page 74: ...ontinuous forms Remove the top Paper Tray by holding the tray by the tabs on both sides and pulling it up from the printer 1 Raise each Pin Tractor cover and remove the continuous forms from the Pin T...

Page 75: ...l the marks align Close the access cover and turn the printer back on Cut Sheet Paper Jams WARNING Do not carry out any operations inside the printer with the Power Switch set to ON Make sure the prin...

Page 76: ...the cut sheet out from the top of the printer If a paper fragment remains inside the printer a use tweezers to grip and extract it or b insert a triple folded sheet from the Paper Tray and turn the pl...

Page 77: ...TION Never use strong solvents or strong detergents on the cabinet they could damage the housing Printer Interior WARNING Allow the printhead to cool before cleaning inside the printer To avoid any ri...

Page 78: ...Chapter 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 Epson IBM compatible Firmw...

Page 79: ...printout of all 96 ASCII characters in a rolling pattern in whatever typeface is selected The top of the printout shows the Printer Model Emulation Epson IBM compatible Firmware F W Revision Level Fla...

Page 80: ...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 81: ...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 82: ...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 83: ...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 84: ...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 85: ...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 86: ...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 87: ...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 88: ...ML690 ML691 User s Guide 88 PROBLEM CAUSE SOLUTION Paper feed operations for both cut sheets and continuous forms are activated The cut sheet is not ejected Eject the cut sheet...

Page 89: ...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 90: ...Number Model ML690 Tractor Assembly Pull 44753901 Tractor Assembly Push 44454901 Cut Sheet Feeder 44497401 Model ML691 Tractor Assembly Pull 44754001 Tractor Assembly Push 44455001 Cut Sheet Feeder 4...

Page 91: ...nt 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 list...

Page 92: ...C 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 180 n 1 to 127 ESC 5 n 27 37 53 n n...

Page 93: ...2 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 Software I Prime ESC NUL 2...

Page 94: ...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 95: ...48 Print Suppress Mode On DC3 19 Print Suppress Mode Off DC1 17 Proportional Spacing On ESC p 1 27 112 49 Proportional Spacing Off ESC p 0 27 112 48 Epson Command ASCII Decimal Reset Printer Clear Buf...

Page 96: ...er Size Maximum 128K Printhead Life 400 million characters average in 10 cpi draft mode at 25 duty and 35 page density Reliability Ribbon Life ML690 approx 8 million characters Draft Mode ML691 approx...

Page 97: ...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 Maximum number of dot columns per line Density Single Double Quadruple ML69...

Page 98: ...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 99: ...ickness 0 019 0 48 mm total thickness bottom path only Paper Size Carbon lined Paper Pressure Sensitive Paper Multi part weight 9 11 lb 35 40 g m2 Number of copies Rear and Front push feed original pl...

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