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1. A 2 03 pcx Microline 590 591 Service Handbook A 9 Board Diagrams A 2 04 Space Motor Board Firmware NONE Fuses NONE Jumpers NONE Sensors SNS2 Encoder Disk Sensor Switches NONE Test Points NONE Board Diagrams A 10 Microline 590 591 Service Handbook Connector Auto Gap Mechanism Printhead Gap Adjusting Screw Microline 590 591 Service Handbook A ll Encoder Disk Connector Color Ribbon Shift Mechanism A 2 04 pcx Board Diagrams A 2 05 RS232 C Serial Interface Board LXHI Option Firmware Masked to the MPU Socket is empty Fuses NONE Jumpers SP1 EPROM Address Select Jumper position as shown EPROM is masked to MPU Sensors NONE Switches NONE Test Points NONE Board Diagrams A 12 Microline 590 591 Service Handbook Default Setting LXHI A 2 05 tif Microline 590 591 Service Handbook A 13 Board Diagrams This page was intentionally left blank Board Diagrams A 14 Microline 590 591 Service Handbook APPENDIX B ILLUSTRATED PARTS LISTING B 1 OVERVIEW B 1 01 General Information This appendix will assist you in identifying the assemblies and parts of the product Use Section Four Failure Analysis to determine the defective part s Locate the part and its part number in this section Appendix B is cross referenced to Section Three Maintenance Microline 590 591 Service Handbook B 1 Illustra
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3. 58233302 N A Package User s Documentation Document Inc 34567 N A 52033001 N A Card QA Reply Document Part of 2 N A 53436029 N A Bag Poly 9 x 12 Document Part of 2 N A 52050806 N A Card Reply OkiSmart Document Part of 2 N A 58078001 N A Card Registration Document Part of 2 N A 59254703 N A Handbook Printer Document Part of 2 N A 59254201 N A Manual Maintenance Document Both N A 59254301 N A Manual Troubleshooting Document Both N A 59253901 N A Product Specifications Document Both N A To order Marketing Literature complete an Okidata Marketing Literature Order Form Fax the completed form to Okidata Marketing Communications Obtain this form by faxing a request to Okidata Marketing Communications Refer to the Service Center Reference Guide for information on contacting Okidata See the following pages Illustrated Parts Listing B 32 Microline 590 591 Service Handbook Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 Procedure N A Okidata Service Center Reference Document N A N A Guide 53547501 Okidata Support 3 Ring Binder Document N A N A 58067201 ABCD Warranty Claim Forms Pkg of Document N A N A 20 58052401 Warranty Summary Forms Pkg of Document N A N A 20 N A Printer Drivers N A N A Refer to Okilink N A
4. D N m Illustrated Parts Listing B 13 Microline 590 591 Service Handbook B 2 03 Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Printer General Assembly Item Okidata P N Oki J P N Description Comments Refer to B 1 02 Disassembly Procedure 53562601 2PP4094 6507P3 Knob Platen ML 500 Series RSPL Both 3 2 06 53067301 2PP4094 6506P2 Cover B for card slot RSPL Both 3 2 06 55937401 4YA4042 1514G301 PCB AKGI w o ROM RSPL Both 3 2 07 55938301 N A IC EEPROM BR93LC46A RSPL Both 3 2 07 55937501 4YA4042 1516G1 PCB LEOP Operator Panel RSPL Both 3 2 09 53562701 3PP4025 3670G1 Panel Operator RSPL Both 3 2 09 56412101 4YB4049 1707P1 Power Supply 120V RSPL 590 3 2 08 56412102 N A Power Supply 120V RSPL 591 3 2 08 56412201 4YB4049 1708P1 Power Supply 230 240V Option RSPL 590 3 2 08 56412202 4YB4049 1708P2 Power Supply 230 240V Option RSPL 591 3 2 08 56609701 3YS4011 1315P1 Cord AC RSPL Both 3 2 01 56624101 3YS4011 1265P1 Cord AC 220V ML Right Ang Option RSPL Both 3 2 01 56624401 3YS4011 1268P1 Cord AC 240V Option RSPL Both 3 2 01 50217201 4YA4023 2601G1 Assembly Printhead RSPL Both 3 2 02 50707501 4PP4025 3621P1 Cla
5. Signal Ground Ground Ground Not Used Supervisory Send Data From Printer Indicates that the printer is not ready to receive data Not Used Data Terminal Ready From Printer Indicates that the printer is not ready to receive data Not Used Failure Analysis Microline 590 591 Service Handbook Commonly Used Serial Cable Configurations IBM 25 Pin Cable Configuration Computer Printer PG PG TD EEE RD RD O TD IBM 9 Pin Cable Configuration Computer Printer RD lt 3 TD TD A RD SG Zoe SG DTR DSR SSD RTS CTS Microline 590 591 Service Handbook 4 51 Failure Analysis 4 8 05 Hexadecimal Dump Mode General Information The hexadecimal dump mode allows you to view the data sent from a computer to the printer When the printer is in hex dump mode all data received both printable characters and control codes will be printed in both hexadecimal and ASCII format NOTE In the ASCI format all non printable characters will be represented by a period Example Below is a line of BASIC code LPRINT CHR 27 0 CHR 30 This is an example of hexadecimal dump Below is the same line as it would appear in Hexadecimal Dump Mode 1B 30 1E 54 68 69 73 20 69 73 20 61 6E 20 65 78 0 This is an ex 61 6D 70 6C 65 20 66 20 61 20 68 65 78 61 64 ample of a hexad 65 63 69 6D
6. Board Diagrams A 4 Microline 590 591 Service Handbook PAAAAAARAARAAAAAARAFA EFFFFEFFFFFEFFEFFFER eo lalelelalelalololajelalol l jelal lala rrrrrrrrrrrrrrrrrrr A 2 01 pcx Microline 590 591 Service Handbook A 5 Board Diagrams A 2 02 Operator Panel Board LEOP Firmware NONE Fuses NONE Jumpers NONE Sensors NONE Switches SEL Select SHIFT LF Line Feed FF Form Feed TEAR PARK QUIET PQ Print Quality CP Character Pitch Test Points NONE Board Diagrams Microline 590 591 Service Handbook le fo le le le SEL SHIFT LF FF TEAR PARK QUIET e e cp A 2 02 pcx Microline 590 591 Service Handbook A 7 Board Diagrams A 2 03 Power Supply Assembly Firmware NONE Fuses F1 125 250V 5 amp AC LINE Fuse F2 125 250V 2 5 amp Protects 5 vdc circuit Jumpers NONE Sensors NONE Switches SW Power Switch Test Points 5 vdc Logic LED Drive Voltage CN2 Pins 5 and 6 8 vdc Serial Interface Line Voltage CN2 Pin 11 8 vdc Serial Interface Line Voltage Comparator Voltage CN2 Pin 10 12 vdc Printhead Analog Voltage CN2 Pin 9 40 vde Printhead Space Motor Line Feed Motor Drive Voltage CN2 Pins 1 and 2 Frame Ground CN2 Pins 3 and 4 Logic Ground CN2 Pins 7 and 8 ALM Alarm Signal from Main Control Board CN2 Pin 12 Board Diagrams A 8 Microline 590 591 Service Handbook
7. Drive current is detected during no overdrive signal Check the printhead connection then replace main control board carriage cable printhead Printhead Connection Alarm 2 Overdrive signal is active but no current is detected Check the printhead connection then replace main control board carriage cable printhead Line Feed Space Motor Driver Alarm High driver temperature the TSD signal has not changed Replace the following main control board linefeed motor space motor MPU Internal RAM Alarm Read write error Replace the main control board Program ROM Alarm Checksum error Replace the ROM and or main control board RAM on Main Control Board Read write error Replace the main control board Failure Analysis 4 20 Microline 590 591 Service Handbook Reference Number Failure Description Cause Recommended Action 13 CG ROM Alarm Checksum error Replace the main control board and or CG ROM 14 EEPROM Alarm No reaction when the MPU reads data Replace the main control board 15 Watchdog Timeout Alarm MPU hung up Power OFF then ON 16 NMI Signal Alarm NMI port of MPU kept low Replace the main control board 17 BRK Instruction Alarm FFFF data detected due to MPU hang up Replace the ROM on the main control board 18 MPU Internal RAM Alarm Read write erro
8. Place anew ribbon cartridge in the printer before testing for parallelism If the density of the top portion of the characters differ from that of the bottom portion follow steps 10 12 Maintenance 3 66 Microline 590 591 Service Handbook This adjustment is comprised of four phases 1 Setup Phase Steps 1 6 The cover is removed and the printhead is placed at a known reference point 2 Printhead Gap Modification Phase Steps 7 9 The distance between the printhead and the platen at the left side of the platen is modified by turning the adjust screw which varies the vertical position of the space motor 3 Parallel Adjustment Phase Steps 10 11 The adjust cam lever is moved to ensure the printhead moves parallel to the platen 4 Recheck Phase Steps 12 13 Verifies that the parallel adjustment phase did not affect the printhead gap modification phase Microline 590 591 Service Handbook 3 67 Maintenance Procedure Setup Phase 1 Remove the upper cover and pull roller assembly Move the change lever to the rear paper feed position 2 3 Rotate the platen 4 Set the gap change gear Figure 1 A to Range 2 by turning the adjust screw using a small phillips screwdriver Turn this screw slowly while moving the carriage 1 to the left if turning the screw counter clockwise or 2 to the right if turning the screw clockwise This will allow easier rotation of the gears and prevent the gears from
9. Voltage Signal Purpose 5 vdc IC logic levels LED drive voltages 8 vdc Serial interface line voltage comparator IC 8 vdc Serial interface line voltage 12 vdc Printhead analog circuit 40 vdc Printhead space motor and line feed motor drive voltage ALM Output from the main control board upon detection of an abnormality in the printhead head gap or color ribbon drive circuits This signal will cause all DC voltages to be turned off Principles of Operation 2 16 Microline 590 591 Service Handbook 2 2 MECHANICAL OPERATION 2 2 01 Printhead Mechanism The printhead is a spring charged 24 pin printhead It is attached to the carriage which moves parallel to the platen Electrically the printhead is controlled by the main control board via the carriage cable and the space motor e 8 8 oO o o e o ra o Sc 8 2 6 O Arrangement of the head pins View from the tip of the printhead 2 24 tif The printhead is composed of the following parts Wire Guide Spring Assembly Wire Armature Spring Yoke Spacer Magnet Assembly Magnet Core Coil Yoke Printed Circuit Board Logic Control Print Driver Analog Sensor Control and Thermistor Cooling Fin Microline 590 591 Service Handbook 2 17 Principles of Operation Printhead Gap Information Three items factor into printhead gap information 1 Printhead Gap Adjustment Th
10. Description Comments Refer to B 1 02 Disassembly Procedure 53563101 3PA4025 3720G1 Frame Main Narrow RSPL 590 3 2 30 53563201 3PA4025 3721G1 Frame Main Wide RSPL 591 3 2 30 50922901 4PP4025 3316P1 Spring Front Pressure Narrow RSPL 590 3 2 28 50922801 4PP4025 3324P1 Spring Front Pressure Wide RSPL 591 3 2 28 53341101 4PP4025 3317P1 Holder Front Roller RSPL Both 3 2 28 53341202 4PP4025 3327G1 Roller Front Pressure RSPL Both 3 2 28 51227801 3PP4025 3318P1 Shaft Front Release Gear Narrow RSPL 590 3 2 27 51227901 3PP4025 3505P1 Shaft Front Release Gear Wide RSPL 591 3 2 27 50097301 N A Pan Paper Narrow RSPL 590 3 2 27 50097401 1PP4025 3506P2 Pan Paper Wide RSPL 591 3 2 27 50923301 3PP4025 3346G1 Spring Pressure Narrow RSPL 590 3 2 24 50923401 3PP4025 3511G1 Spring Pressure Wide RSPL 591 3 2 24 50805201 4PP4025 3351P1 Lever Switch Cut Sheet Continuous RSPL Both 3 2 24 51228301 4PP4025 3350P1 Arm Front Release Gear RSPL Both 3 2 24 50924701 4PP4025 3365P1 Spring Lock RSPL Both 3 2 20 50097701 3PA4025 3360G2 Paper Chute Assembly Narrow RSPL 590 3 2 20 50097801 3PA4025 3515G2 Paper Chute Assembly Wide RSPL 591 3 2 20 53341301 3PB4025 3364
11. For information on using Okilink II please refer to the Service Center Reference Guide NOTICES Pay attention to all notices that appear throughout this training course They are for your safety Here are the definitions of the notices NOTE This notice refers to supplemental information CAUTION Deviation from the listed procedures may result in damage to the product WARNING Deviation from the listed procedures may result in personal injury Microline 590 591 Service Handbook 1 3 Course Administration WHERE TO SEND TESTING MATERIALS Refer to the Okidata Service Center Reference Guide for where to send the test materials The Okidata Service Center Reference Guide is sent to your dealership along with the Okidata Service Contract materials It is available from Okidata Dealer Service Itis also available through Okilink IL Course Administration 1 4 Microline 590 591 Service Handbook MISSING ITEMS OR MISSING PAGES Missing Items When you receive the training kit you MUST verify that the kit contains the items listed on the Read Me First sheet If any items are missing please contact Okidata Logistics at the appropriate number listed below Facsimile 1 609 424 7423 Voice 1 800 727 8654 You must provide the following information Okidata Authorization Number Dealer Number Okidata Customer Number Order Acknowledgment Number on the invoice Part Number of kit Missing Pages If you find that pa
12. When lubricating refer to Section 3 5 of this Service Handbook P N 50098901 Carriage Frame Set P N 50923601 Spring Support Protect Reset P N 53067601 Protector Support Assembly P N 53563501 Shaft Carriage Narrow P N 53563502 Shaft Carriage Wide Maintenance 3 52 Microline 590 591 Service Handbook Maintenance Microline 590 591 Service Handbook 3 53 3 2 26 Leaf Spring Perform these procedures 3 2 01 3 2 06 3 2 07 3 2 16 and 3 2 25 Position the unit so you can access the top and bottom of the leaf spring 1 1 2 3 Start at one end of the spring 4 Use a straight slot screwdriver to release the bottom extension 2 from the claw of the base frame Pull the spring up to release the top of the spring from the upper claw 6 Repeat the above two steps working towards the opposite end of the spring 7 Remove the spring C P N 50923001 Spring Leaf Narrow C P N 50923101 Spring Leaf Wide Maintenance 3 54 Microline 590 591 Service Handbook x ra a 15 T SN mn Maintenance 3 55 Microline 590 591 Service Handbook 3 2 27 Bottom Paper Sensor Levers 1 Perform these procedures 3 2 01 3 2 06 3 2 07 3 2 16 3 2 17 3 2 19 3 2 20 3 2 22 3 2 23 and 3 2 24 Working from the underside of the unit release the claws of the paper pan 1 When you release a claw push on the claw to move the paper pan away from the main frame Remove the pan
13. Rotate the bottom sensor lever 2 until the flag is at the top Then lift the lever and work it free of the frame to remove it This lever has a box end Remove the bottom paper end lever 3 Work the front release gear shaft 4 free of the tabs and remove it NOTE Lubrication When lubricating refer to Section 3 5 of this Service Handbook P N 50097301 Pan Paper Narrow P N 50097401 Pan Paper Wide P N 50804601 Lever Bottom Paper End P N 50804701 Lever Bottom Sensor P N 51227801 Shaft Front Release Gear Narrow P N 51227901 Shaft Front Release Gear Wide Maintenance 3 56 Microline 590 591 Service Handbook x ra a 15 T SN mn Maintenance 3 57 Microline 590 591 Service Handbook 3 2 28 Front Pressure Roller Assembly 1 Perform these procedures 3 2 01 3 2 06 3 2 07 3 2 16 3 2 17 3 2 19 3 2 20 3 2 22 3 2 23 and 3 2 24 3 2 27 Separate the arms of the front roller holders 1 and remove the front pressure roller 2 Squeeze the extensions of the front roller holders together and remove the holders Lift and remove the front pressure springs 3A and 3B The front pressure springs for the Microline 590 3A have three extensions The front pressure springs for the Microline 591 3B have one extension The Microline 591 uses both springs Lubrication When lubricating refer to Section 3 5 of this Service Handbook L P N 50922901 Spring Front Pressure N
14. Thank You for purchasing this Factory Service Manual on EBAY from PCTECHI NFO Click Here for more Factory Service Manuals for other Computer and Printer Copier Manufacturers from PCTECHI NFO OKIDATA Microline 590 591 Service Handbook P N 59256303 Microline 590 591 Service Handbook This document may not be reproduced without the written permission of the Okidata Technical Training Group Every effort has been made to ensure the accuracy of the information contained in this training course Okidata is not responsible for errors beyond its control O 1994 by Okidata All rights reserved First Edition October 1992 P N 59256301 Second Revision March 1993 Third Revision August 1993 Second Edition April 1994 P N 59256302 Fourth Revision April 1994 Third Edition November 1994 P N 59256303 Written and produced by the Okidata Technical Training Group Please address any comments on this publication to Technical Training Group Okidata 532 Fellowship Road Mount Laurel NJ 08054 3499 Fax Number 609 235 2600 ext 7034 Okilink Login Name Technical Training OKIDATA is a registered trademark of Oki Electric Industry Company Ltd marques deposee de Oki Electric Industry Company Ltd marca registrada Oki Electric Industry Company Ltd MICROLINE is a registered trademark of Oki Electric Industry Company Ltd marque depose de Oki Electric Industry Company Ltd OkiSmart Paper Handling is a trademar
15. 15 T SN mn Maintenance 3 39 Microline 590 591 Service Handbook 3 2 19 Platen Assembly Perform these procedures 3 2 01 and 3 2 06 Move the change lever 1 to the bottom feed position to the rear of the printer Push the lock levers 2 in then rotate them towards the front to unlock them from the frame The levers should be vertical Lift the platen assembly 3 straight up and remove it NOTE Installation After installing the platen assembly check the printhead gap adjustment Refer to Section 3 3 of this Service Handbook Cleaning When cleaning refer to Section 3 4 of this Service Handbook Lubrication When lubricating refer to Section 3 5 of this Service Handbook P N 50098301 Platen Assembly Narrow P N 50098302 Platen Assembly Wide Maintenance 3 40 Microline 590 591 Service Handbook 3 2 19 pcx Microline 590 591 Service Handbook 3 4 Maintenance 3 2 20 Paper Chute Assembly Perform these procedures 3 2 01 3 2 06 and 3 2 19 Remove the rear pressure roller 1 Use a straight slot screwdriver to release the claws of the lock spring 2 and remove the spring Remove the paper chute assembly 3 NOTE The paper chute assembly includes the levers for the rear and top paper feed paths P N 53341301 Roller Pressure Rear Narrow P N 53341401 Roller Pressure Rear Wide P N 50924701 Spring Lock P N 50097701 Paper Chute Assembly N P N 500978
16. 3PB4055 2887P1 Gear Line Feed Idle RSPL Both 3 2 21 51010301 3PA4025 3387G1 Plate Left Ground RSPL Both 3 2 16 50923001 3PP4025 3320P1 Spring Leaf Narrow RSPL 590 3 2 26 50923101 3PP4025 3507P1 Spring Leaf Wide RSPL 591 3 2 26 53067701 3PP4025 3380P1 Cam Adjust RSPL Both 3 2 15 53563301 3PP4025 3376P1 Rack Space Narrow RSPL 590 3 2 13 53563401 3PP4025 3522P1 Rack Space Wide RSPL 591 3 2 13 50923501 4PB4025 3377P1 Spring Tension Space Rack RSPL Both 3 2 13 51009701 4PP4025 3378P1 Guide Rail Ground Clip RSPL Both 3 2 15 51009801 3PP4025 3379P1 Guide Rail Narrow RSPL 590 3 2 15 51009901 3PP4025 3523P1 Guide Rail Wide RSPL 591 3 2 15 53563501 4PP4025 3381P1 Shaft Carriage Narrow RSPL 590 3 2 25 53563502 4PP4025 3381P2 Shaft Carriage Wide RSPL 591 3 2 25 53067601 4PA4025 3382G1 Protector Support Assembly RSPL Both 3 2 25 50923601 4PB4025 3385P1 Spring Support Protect Reset RSPL Both 3 2 25 Illustrated Parts Listing B 16 Microline 590 591 Service Handbook Illustrated Parts Listing 17 B Microline 590 591 Service Handbook B 2 05 Printer Unit 2 of 3 Part numbers are subject to change Refer to Okilink II for current part numbers and pri
17. C P N 51228101 Gear Tractor Maintenance 3 60 Microline 590 591 Service Handbook x ra 2 D y en Io Maintenance 3 61 Microline 590 591 Service Handbook 3 2 30 Main Frame 1 All disassembly procedures must be carried out to reach the base frame 1 P N 53563101 Frame Main Narrow RSPL 590 B 2 03 4 5 P N 53563201 Frame Main Wide RSPL 591 B 2 03 4 5 Maintenance 3 62 Microline 590 591 Service Handbook x ra a 15 T SN mn Maintenance 3 63 Microline 590 591 Service Handbook This page was intentionally left blank Maintenance 3 64 Microline 590 591 Service Handbook 3 3 PRINTER ADJUSTMENTS 3 3 01 General Information This section contains the procedures for performing adjustments on the printer These procedures may be required when replacing either consumables or parts The disassembly assembly procedures list the required adjustments and refer you to this section Failure to perform these procedures may result in unnecessary service calls Microline 590 591 Service Handbook 3 65 Maintenance 3 3 02 Printhead Gap Adjustment General Information Before performing this adjustment always verify that the printhead is properly installed This adjustment should be performed when the following parts are replaced Printhead 3 2 02 Space Motor Assembly 3 2 11 Space Rack 3 2 13 Guide Rail 3 2 15 Platen Assembly 3 2 19 Carriage Shaft 3 2 25 NOTE
18. Carriage shaft Gap change gear C Figure 1 Print head 0 014 0 001 inch Counter clockwise Gap Decreases Clockwise Gap Increases Adjustcam Adjust gear Figure 2 3 3 01a tif Microline 590 591 Service Handbook 3 69 Maintenance 3 3 03 Key Combinations Key Combinations Description SEL LF Reset Menu to Factory Defaults Hold during Power ON SEL Access Menu if Menu set to LIMITED OPERATION Hold during Power ON QUIET FF LOAD Reset Top of Form to Factory Default 1 inch Hold during Power ON QUIET Activate Rolling ASCII Test Hold during Power ON LF Activate Font Test Hold during Power ON SEL FF LOAD Activate Hexadecimal Dump Test Hold during Power ON Maintenance 3 70 Microline 590 591 Service Handbook 3 3 04 Menu Operation General Information The menu is used to customize the printer s settings and features The Menu is made up of a number of Groups Each Group has a list of Items Each Item has several Settings Menu Mode To place the printer in the Menu Mode follow this procedure 1 Verify that continuous feed paper is installed 2 Verify that the ribbon is correctly installed 3 Verify that the width of the installed paper matches the paper width menu setting CAUTION If the Menu is set for wide paper and narrow paper is used the printhead will print on the platen This could damage destroy the printhead platen a
19. Illustrated Parts Listing B 9 Microline 590 591 Service Handbook B 2 01 Printer Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Item Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 Procedure 62409201 Printer ML590 Parallel Epson IBM N A N A Comp 120 V 62409202 Printer ML590 Parallel Epson IBM N A N A Comp 220 V 62409301 Printer ML591 Parallel Epson IBM N A N A Comp 120 V 62409401 Printer ML591 Parallel Epson IBM N A N A Comp 220 V Illustrated Parts Listing B 10 Microline 590 591 Service Handbook B 2 30 pcx Microline 590 591 Service Handbook B 11 Illustrated Parts Listing B 2 02 Upper Cover Assembly Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Item Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 Procedure 53066901 Cover Upper Narrow RSPL 3 2 06 1PP4094 6501P1 590 53067001 Cover Upper Wide RSPL 3 2 06 1PP4094 7201P1 591 51009401 Guide Sheet Narrow RSPL 3 2 06 N A 590 51009501 Guide Sheet Wide RSPL 3 2 06 N A 591 53067101 Cover Access Narrow RSPL 3 2 06 2PA4094 7381G1 590 53067201 Cover Access Wide RSPL 3 2 06 2PA4094 7382G1 591 Illustrated Parts Listing B 12 Microline 590 591 Service Handbook x Q
20. paper paper mm gap range 9 Print instruction Number o sheets of Number of Max Preliminary printing MmuOrm lt z ml Is gap range at 6 or above Pressure sensitive paper Setting of gap is SP or mare range at5 interleaf paper is 4P or more Envelope Appropriate gap setting gap levels 6 7 8and 9 Preliminary printing Appropriate gap setting gap levels 1 2 3 4 and 5 2 2 01d tif Microline 590 591 Service Handbook 2 19 Principles of Operation Interconnect Diagram Control Board to Printhead NOTE The printhead coil resistance values ARE NOT LISTED The individual printwire control lines CANNOT be accessed on this printhead Connector pin number ontrol Carriage Motor board section nean r EP EP EP EP EL 5V RST N ELS jae ee HH SITE Tee HDSLT N HDSDATA N HDSCLK N CLK ERR 2 2 01A pcx Principles of Operation 2 20 Microline 590 591 Service Handbook Line Feed Motor Resistance The resistance of each coil should be approximately 13 ohms Pin number of LE Motor Connector pin number on nu pb Wn gt 2 2 01B pcx Space Motor Resistance The resistance of each coil should be approximately 5 ohms Pin number of SP Motor Connector pin number SP U SP V SP W PHASE A PHASE B 5V EL 2 2 01C pcx Microline 590 591 Service Handbook 2 21 Principles of Operation Printhead Operation When the printhead is idle the armature is attracted to the perma
21. 0 If the printing is sometimes lighter change the setting to 1 If 1t is sometimes darker change it to 1 Press SEL and SHIFT buttons simultaneously to exit Menu Mode There are vertical spacing problems when using continuous forms and Forms Tear Off The Microline 590 591 does not have a bail arm so pages do not feed as high as printers with bail arms The first page does not line up correctly Enter Menu Mode and disable Form Tear Off Exit Menu Mode Deselect the printer and set the paper position using the Micro Feed buttons hold SHIFT while pressing MICRO FEED UP or DOWN Enter Menu Mode and enable Form Tear Off Exit Menu Mode Failure Analysis 4 12 Microline 590 591 Service Handbook 9 The ALARM light is not on but paper needs to be loaded If the ALARM light is off the printer thinks that paper is loaded To correct this problem press and release the SEL button Then hold the SHIFT button and press the RESET Character Pitch button The ALARM light will come on and you will be able to load paper 10 The ALARM light is on and the Character Pitch 15 light is flashing This indicates a paper loading error To stop the flashing light press the SEL button Before trying to load paper check to be sure that you have the paper lever in the correct position BOT TOP REAR for the path that you are using CAUTION Always power OFF the printer before you turn the platen knob If the paper lever is in the
22. 10 07 Bitstream Facelift 2 0 For Windows 3 0 and 3 1 Includes 14 scalable fonts Microline 590 591 Service Handbook 1 23 Specifications 1 10 08 OKISmart Typer Utility Packaged with printer Includes Typewriter Mode Form Creation Utility and Barcode Utility 1 10 09 OKISmart Panel Utility Packaged with printer Includes Front Panel Control Utility and Drivers for Windows 3 0 amp 3 1 NOTE The OkiSmart software includes three programs 1 OkiSmart Control 2 OkiSmart Panel Emulator 3 OkiSmart Setup Refer to the Printer Handbook for more information Specifications 1 24 Microline 590 591 Service Handbook 1 11 RELIABILITY 1 11 01 Mean Time Before Failure MTBF Approximately 6 000 hours 25 duty cycle 35 page density 1 11 02 Mean Time To Repair MTTR Approximately 15 minutes to major sub assembly level 1 11 03 Printer Life Approximately 16 000 hours of power on time 25 duty cycle 35 page density 1 11 04 Printhead Life Average 200 million characters in 10 cpi utility mode normal 25 duty 35 page density 1 11 05 Ribbon Life Black Approximately 4 million characters Color Black Approximately 1 5 million characters Cyan Approximately 1 5 million characters Magenta Approximately 1 5 million characters Yellow Approximately 0 8 million characters 1 11 06 Warranty Limited Two years parts and labor 1 11 07 Service Authorized Okidata Service Centers Microline 590 591 Service Ha
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24. Clamp Mechanism Moving the Change Lever between the Bottom Top and Rear positions changes the positions of the Front Release Gear Arm and the Release REAR Cam The movement of the Front Release Gear Arm changes the position of the Front Release Gear Shaft This causes the Front Pressure Roller to open or close The movement of the Release Cam causes the Rear Pressure Roller to open or close 2 38 tif Position of Change Lever Status of Front Pressure Roller Tension of Front Pressure Roller Status of Rear Pressure Roller Tension of Rear Pressure Roller Bottom OPEN N A OPEN N A Top CLOSED 250 g CLOSED 700g Rear CLOSED 90g OPEN N A Principles of Operation Microline 590 591 Service Handbook Cut Sheet Continuous Sheet Switching Mechanism Top Feed for cut sheet paper When cut sheet paper is used place the change lever in the Top Feed position As the platen turns the platen gear causes the idle gear to rotate At this time the rear and front pressure rollers press against the platen and feed the cut sheet The cut sheet detection lever enables the cut sheet detection switch which is located on the main control board This places the printer in the cut sheet mode When cut sheet paper is placed between the platen and the paper chute the printer automatically feeds the sheet to the print start position
25. FORM FEED Load switches while powering ON the printer A True B False Which of the following areas should be lubricated A Tractor pins Pressure roller Rubber Face Platen assembly Rubber Face Visible bearings of gears of the gear case assembly Course Administration 1 22 Microline 590 591 Service Handbook The printhead gap adjustment is set by turning the adjusting screw located on the space motor assembly Turning the adjusting screw counter clockwise will increase the gap Turning it clockwise will decrease the gap A True B False Unexpectedly the printer stops printing The ALARM lamp is flashing The 15 cpi LED is lit According to the FAULT ALARM section of the Service Handbook which of the following should be replaced first A Printhead and the main control board Line feed motor and space motor Interface LXHI board and the feed mechanism ROM and or main control board Microline 590 591 Service Handbook 1 23 Course Administration According to the Service Handbook before resetting the printer menu to factory defaults you should always A run a self test perform the hex dump test print the menu perform the ASCII test Course Administration 1 24 Microline 590 591 Service Handbook SECTION ONE SPECIFICATIONS 1 1 OVERVIEW 1 1 01 General Information The Microline 590 and Microline 591 are letter quality dot matrix printers which utilize OKISMART paper handling Pat
26. Group prints Rear Feed or Bottom Feed Press ITEM until the desired Item prints Form Tear Off Press SET until the desired setting prints Off 500 mS 1 sec 2 sec Press EXIT to save the change and exit Menu Mode Load paper Press FORM FEED The paper will advance past the start print position Top of Form to the tear bar position The paper says in this position until the printer receives data Then the paper will be retracted to the appropriate Top of Form position A few seconds after printing stops the paper advances to the tear bar position Checking Top of Form with Form Tear Off Activated 1 2 Load paper Press and hold TEAR When you release TEAR the paper will return to the tear off position 3 The paper will retract to the Top of Form position Release TEAR 5 The paper advances to the tear bar position Microline 590 591 Service Handbook 3 87 Maintenance 3 3 09 Resets Reset Menu to Factory Defaults CAUTION Once the menu has been reset all customized menu settings will be lost Always print the menu before resetting the printer to factory defaults To reset the menu to factory default settings follow this procedure 1 Before resetting the Menu Okidata STRONGLY RECOMMENDS printing the Menu Printing the Menu provides a reference of customized settings When the Menu is reset all customized settings are LOST Power off the printer 3 Press and hold SEL
27. I ut et detection lever Cut sheet detection switch Cut sheet detection lever 2 2 08 pcx Principles of Operation 2 36 Microline 590 591 Service Handbook Continuous Feed Paper Set the change lever to either the REAR FEED or BOTTOM FEED position NOTE When the change lever is in the REAR FEED or BOTTOM FEED position the cut sheet detection lever does not contact the cut sheet detection switch BASW which is located on the main control board Place continuous feed paper in the appropriate tractor Press the FF LOAD switch The line feed motor will feed the paper until the leading edge of the paper to the top of form position Push down the FF LOAD switch y Detection of the sheet supplied Line feed about 3 inches until the detection of the sheet supplied 2 42 tif Microline 590 591 Service Handbook 2 37 Principles of Operation 2 2 09 Paper Park If continuous feed paper is installed and printing on cut sheet paper is desired it is not necessary to unload the continuous feed paper The Paper Park feature provides a means of retracting the continuous feed paper from the paper path to allow feeding of the cut sheet paper Paper Park Operation Make sure the change lever is in the REAR FEED or BOTTOM FEED position Press the PARK switch on the operation panel A reverse line feed operation retracts the paper until paper end occurs or 19 inches of paper have been retracted Retracting 19 inches o
28. LEOP A 2 03 Power Supply Assembly A 2 04 Space Motor Board A 2 05 RS232 C Serial Interface Board LXHI Option APPENDIX B ILLUSTRATED PARTS LISTING B 1 OVERVIEW B 1 01 B 1 03 Parts Ordering Information Service Center Reference Guide Placing a Parts Order CHARTS B 2 01 B 2 02 B 2 03 B 2 04 B 2 05 B 2 06 B 2 07 B 2 08 B 2 09 B 2 10 B 2 11 B 2 12 B 2 13 Printer Upper Cover Assembly Printer General Assembly Printer Unit 1 of 3 Printer Unit 2 of 3 Printer Unit 3 of 3 Carriage Assembly Options Option Parts Consumables Packing Materials Documentation Service Training Kit Revision List This page was intentionally left blank COURSE ADMINISTRATION OVERVIEW Okidata developed this course in order to provide the information necessary to install and maintain the Microline 590 and Microline 591 printers Upon successful completion of this training course you will be able to do the following Install and operate the product Locate the major assemblies of the product Identify fault indications Perform corrective and preventive maintenance The Service Handbook is the primary reference manual for this course You cannot however successfully complete this course by referring only to this manual Take the time to familiarize yourself with all of the documentation in the training kit This additional information will greatly simplify working with the product Okidata s Technical Tra
29. N 53067001 Cover Upper Wide RSPL P N 53067101 Cover Access Narrow RSPL P N 53067201 Cover Access Wide RSPL P N 53067301 Cover B for card slot RSPL A Aaa al P N 53562601 Knob Platen ML500 Series RSPL Maintenance 3 14 Microline 590 591 Service Handbook 4 ae N S A LA N N ANA rat E E 3 2 06 pcx Maintenance 15 3 Microline 590 591 Service Handbook 3 2 07 Control Board AKGD Perform these procedures 3 2 01 and 3 2 06 Remove the two screws 1 Release the control board AKGI 2 from the bracket 3 Tilt the board to access the connectors Detach connectors CN7 operator panel 4 CNS carriage cable 5 CN3 power supply 6 and CN6 line feed motor 7 Remove the board NOTE Installation The bottom sensor lever must be positioned in the SNS3 sensor 8 The rear sensor lever must be positioned in the SNS1 sensor 9 The cut sheet continuous sensor lever must be positioned below the BASW sensor 10 The lever should contact the sensor only when the change lever is in the top feed middle setting The IC EEPROM is soldered in on the board C P N 55937401 PCB AKGI w o ROM C P N 55938301 IC EEPROM BR93CC46A Maintenance 3 16 Microline 590 591 Service Handbook 3 2 07 pcx Microline 590 591 Service Handbook 3 17 Maintenance 3 2 08 Power Supply Assembly Perform these procedures 3 2 01 and 3 2 06 D
30. N A 58088301 Certification Test Document N A N A 58088401 Certification Test Answer Sheet Document N A N A 58088501 Course Critique Document N A N A 58088601 Envelope Pre Printed Return Document N A N A 59256301 Service Handbook Document N A N A 59256401 User s Documentation Document N A N A 52033001 Card QA Reply Document N A N A Both 52050806 Card Reply OkiSmart Document N A N A Both 58078001 Card Registration Document N A N A Both 59254703 Handbook Printer Document N A N A Both 57519501 Service Videotape Document N A N A 52062702 Label Service Videotape Case Document N A N A 52062703 Label Service Videotape Front Document N A N A 52062704 Label Service Videotape Spine Document N A N A 57517101 Red Vinyl Case VHS Videotape Document N A N A 53567001 Storage Box Document N A N A 53567101 Cardboard Sleeve Document N A N A Illustrated Parts Listing B 34 Microline 590 591 Service Handbook P N 58229002 Microline 590 591 Service Training Kit This kit was replaced by P N 58229003 Items in the training kit except for the Printer Handbook are NOT available separately Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 Procedure 58229002 Kit ML590 591 Service Training Document N A N A Both 52062702 Label Kit Document N A N A 58088102 Read Me First Document N A N A 592
31. OPERATIONAL SPECIFICATIONS Table of Print Speed and Character Matrix Mode LQ Utility High Speed Draft Speed 120 12 cpi 360 12 cpi 450 15 cpi 29x 18 9x17 7x17 Matrix H x V 1 6 02 Characters Per Line Microline 590 Characters Per Line Characters Per Inch Utility Letter Quality 80 10 164 65 96 12 161 65 15 148 65 17 1 96 65 20 95 65 Microline 591 Characters Per Line Characters Per Inch Utility Letter Quality 136 10 105 40 163 12 96 40 204 15 88 40 233 17 1 59 40 272 20 59 40 Microline 590 591 Service Handbook 1 5 Specifications 1 6 03 Character Pitches 5 6 8 5 10 12 15 17 1 20 Character Sets Standard ASCH EPSON Character Set I amp I IBM Character Set I II amp All Characters Foreign Character Substitution International Character Sets Code Page 850 860 863 and 865 Bar Code Code 39 UPC A UPC E EAN 8 EAN 13 Interleaved 2 of 5 Code 128 POSTNET 1 6 05 Printer Emulations NOTE The emulations are co resident Epson LQ IBM XL 24E AGM IBM Proprinter Specifications 1 6 Microline 590 591 Service Handbook 1 6 06 Fonts Letter Quality Courier Letter Gothic Prestige Orator Roman
32. Panel PCB LEOP Perform these procedures 3 2 01 3 2 06 and 3 2 07 Cut the nylon tie and release the cable Nor shown Disengage the claws 1 on both sides of the frame Lift the operator panel assembly 2 straight up and remove it Open eight claws 3 and remove the operator panel PCB LEOP 4 from the operator panel 5 C P N 53562701 Panel Operator L P N 55937501 PCB LEOP Operator Panel Maintenance 3 20 Microline 590 591 Service Handbook x ra a D lt 4 N oa Maintenance 3 21 Microline 590 591 Service Handbook 3 2 10 PC Connector 1 Perform these procedures 3 2 01 3 2 02 and 3 2 04 2 Remove the two screws 1 3 Remove the PC connector 2 NOTE Installation Do not touch the contacts of the PC connector Do not touch the contacts of the space motor 3 Cleaning When cleaning refer to Section 3 4 of this Service Handbook P N 56729601 Connector PC HD40 Maintenance 3 22 Microline 590 591 Service Handbook Maintenance 23 3 Microline 590 591 Service Handbook 3 2 11 Space Motor and Roller Guide Assemblies Perform these procedures 3 2 01 3 2 02 3 2 04 and 3 2 10 Remove the three screws 1 Lift the space motor assembly 2 Remove the left 3 and right connector holders 4 Remove the roller guide assembly 5 and guide roller spring 6 Use firm pressure to pull the carriage cable 7 out to detach the cable from the spac
33. Press ITEM until Operator Panel Function prints Press SET until FULL OPERATION prints 10 Press EXIT to save the change and exit Menu Mode Microline 590 591 Service Handbook 3 77 Maintenance Menu Settings Factory default settings are printed in Bold Italic The tables show all possible menu settings available with the Microline 590 591 What you will actually see depends on the active emulation and the options installed Group Item Setting Printer Control Emulation Mode IBM PPR IBM AGM Epson LQ Font Print Mode LQ Courier LQ Roman LQ Swiss LQ Swiss Bold LQ Orator LQ Gothic LQ Prestige Utility Pitch 10 12 15 17 1 20 cpi Proportional Spacing No Yes Style Normal Italic Size Single Double Symbol Sets Character Set Set I Set Il Language Set American French German British Danish Swedish Italian Spanish Japanese Norwegian Danish Il Spanish II Latin American French Canadian Dutch Publisher Zero Character Slashed Unslashed Code Page USA Canada French Multilingual Portugal Norway Model 591 only Appears only when optional Roll Paper Stand is installed Appears only when IBM Proprinter emulation is selected id Optional color ribbon must be installed to print colors other than black ok cK cK ck ok ok ck ck ck Ok Ok ok cK ck ck ck ck ok Maintenance Appears only w
34. ROM and Random Access Memory RAM Be able to use basic tools Be able to use a digital multimeter DMM Equipment The following equipment is recommended for the successful completion of this training course Microline 590 or Microline 591 optional Tools optional refer to Module Three of the Service Handbook Personal Computer for Okilink II connection Modem for Okilink II connection Communications Software for Okilink II connection Telephone for Faxable Facts connection Facsimile Machine for Faxable Facts connection Video Cassette Player for viewing videotape Video Monitor for viewing videotape Documentation You should have access to the following documentation while completing this course Okidata Service Center Reference Guide Service Handbook Printer Handbook Service Videotape Course Administration 1 2 Microline 590 591 Service Handbook INFORMATION UPDATES Every effort has been made to ensure the accuracy of the information contained in this training course Okidata is not responsible for errors beyond its control Technical updates are made available to authorized Service Centers through the Technical Service Bulletins TSBs Okidata s Monthly Technical Mail The TSBs are distributed via Okidata s Bulletin Board Okilink II Additions and corrections to the training materials are available in the Training Section of Okilink II Please sign on and check this section before beginning this course
35. Screwdriver Needle Nose Pliers 4 Inch Wire Cutters Digital Multimeter Feeler Gauge capable of measuring 014 inches Shop Vacuum Clean soft and lint free Cloth All Purpose Cleaner Contact Kleen Okidata P N 51802301 Platen Cleaner Machine Grease Machine Oil Microline 590 591 Service Handbook 3 1 Maintenance 3 1 03 Maintenance Precautions Do not disassemble the unit if it is operating normally Before starting disassembly and assembly always turn the AC power switch OFF and pull out the AC plug Detach the interface cable if installed Do not remove parts unnecessarily Try to keep disassembly to a minimum Use the recommended maintenance tools When disassembling follow the listed sequence Failure to follow the correct sequence may result in damaged parts Since screws collars and other small parts are easily lost they should be temporarily attached to the original positions When handling circuit boards use extreme care Integrated circuits microprocessors ROM and RAM can be destroyed by static electricity Do not place printed circuit boards directly on conductive surfaces Follow the recommended procedures when replacing assemblies and units Perform the printhead gap adjustment procedure Refer to Section 3 3 of this Service Handbook when the any of the following occur Print Quality is darker on one side of the document Parts are replaced Printh
36. Swiss Utility High Speed Draft 15 cpi Bar Code Code 39 UPC A UPC E EAN 8 EAN 13 Interleaved 2 of 5 Code 128 POSTNET Microline 590 591 Service Handbook 1 7 Specifications 1 6 07 Front Panel Switches Select Micro Feed Up Down Menu Mode Paper Park Line Feed Pitch Selection Form Feed Print Quality Selection Top of Form Tear Quiet 1 6 08 Graphics Resolution Graphics Resolution 360 x 360 DPI maximum 1 6 09 Interface Standard Parallel Optional RS232C Serial 1 6 10 Line Feed Increments Fixed 6 lines per inch lpi 0 167 inch 4 23 millimeters 8 lines per inch Ipi 0 125 inch 3 175 millimeters Variable n 60 inch n 72 inch n 180 inch n 216 inch n 360 inch Line Feed Time 65 milliseconds 6 lines per inch lpi 6 milliseconds 8 lines per inch lpi 1 second 5 0 inches Continuous paper feed rate Specifications 1 8 Microline 590 591 Service Handbook Menu Mode Print Prints the entire menu Group Selects Group Function Item Selects Item Set Selects Item Value Exit Exits Menu Mode Enters Select 1 6 13 Paper Feed Methods Standard Friction Feed Top Rear Push Tractor Rear Optional Pull Tractor Bottom Bottom Push Tractor Bottom Single Bin Cut Sheet Feeder Top CSF 5000 Narrow CSF 5001 Wide Paper Feed Paths Top Feed Standard Rear Feed Standard Bottom Feed by using an Optional feed mechanism Special Features Paper Park Automatic Paper Loa
37. and LF while powering ON the printer NOTE Refer to the Printer Handbook for a list of the factory default settings Reset the Top of Form to Factory Default 1 Power off the printer 2 Press and hold the QUIET and FF LOAD switches while you power on the printer NOTE The factory default Top of Form Setting is 1 inch Maintenance 3 88 Microline 590 591 Service Handbook 3 4 CLEANING 3 4 01 General Information An accumulation of paper dust is the most frequent cause of print quality problems in a dot matrix printer Small pieces of paper can cause paper jams A dirty platen will smudge paper It is important to clean the printer regularly paying particular attention to the printhead area and the paper paths If the lubrication procedures are not performed properly the printer will require more frequent cleaning Excessive lubricant attracts dust and accumulations build up quickly Keeping the covers in place and performing the cleaning procedures correctly will help ensure the highest quality printer output 3 4 02 Cleaning Schedule Routine inspection and cleaning should be performed 1 every six months or 2 every 300 hours of operating time 3 4 03 Cleaning Tools Clean soft lint free cloth All purpose cleaner 1 2 3 Vacuum cleaner 4 Platen cleaner 3 4 04 Areas to be Cleaned Area Procedure Cleaning Tool s Carriage Shaft 3 2 25 Cloth and All purpose cleaner Area around c
38. board and the fuse on the power supply board Are they open Yes Replace the open fuse with one that has the proper rating Go to A No Replace the power supply unit Go to A A Has the problem been resolved Yes End of procedure No Replace the operation panel board Has the problem been resolved Yes End of procedure No Replace the main control board Has the problem been resolved Yes End of procedure No Contact Technical Support Microline 590 591 Service Handbook 4 37 Failure Analysis RAP 10 Parallel Interface Problem START No parallel port communication Is the SEL LED blinking Yes The printer is in the Print Suppress mode Disable the menu item Print Suppress if the function is not required End of procedure No Does the SEL LED light Yes GotoA No Press SEL key Has the problem been resolved No __ Disconnect the cable Does the SEL LED light Yes Change the menu item I prime to invalid No Goto A Yes Is data being received properly Yes End of procedure No Check that the cable is properly connected to the Host PC and the correct LPT port is selected Does the SEL LED light No Goto A Yes Change the menu item I prime to invalid End of procedure Failure Analysis 4 38 Microline 590 591 Service Handbook A Replace the interface cable Has the problem been resolved Yes End of procedure No Replace the main control board Has the problem been resolved Yes End of procedure N
39. cam Slide the cam and spring away from the base frame until the opposite end of the spring can be installed into the frame Make sure that the front release gear arm is engaged as shown A Lubrication When lubricating refer to Section 3 5 of this Service Handbook P N 50805201 Lever Switch P N 50805301 Cam Release P N 50923301 Spring Pressure Narrow P N 50923401 Spring Pressure Wide P N 51228301 Arm Front Release Gear Maintenance 3 50 Microline 590 591 Service Handbook lt 09 Q D O a O iam lt o ra 3 2 24 pcx Maintenance 51 3 Microline 590 591 Service Handbook 3 2 25 Carriage Shaft CAUTION The space motor assembly etc may be left in place when removing the carriage shaft However use extra care when doing so The carriage cable should be detached from the space motor before removing the carriage shaft Perform these procedures 3 2 01 3 2 06 3 2 07 and 3 2 16 Push the end A of the carriage shaft 1 until it clears the base frame Pull the carriage shaft free of the base frame Remove the support protect reset spring 2 Remove the support protector assembly 3 Remove the frame set carriage 4 NOTE Installation After installing the carriage shaft check the printhead gap adjustment Refer to Section 3 3 of this Service Handbook Cleaning When cleaning refer to Section 3 4 of this Service Handbook Lubrication
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41. knob acoustic cover and paper separator Microline 590 Width 18 35 inches 466 millimeters Depth 17 24 inches 438 millimeters Height 6 52 inches 165 millimeters Microline 591 Width 24 41 inches 620 millimeters Depth 17 24 inches 438 millimeters Height 6 52 inches 165 millimeters 1 2 02 Printer Weight Microline 590 16 5 pounds 6 5 kilograms Microline 591 19 8 pounds 8 9 kilograms Specifications 1 2 Microline 590 591 Service Handbook 13 POWER REQUIREMENTS 1 3 01 Input Power 120 VAC 5 5 15 230 240 VAC 10 14 1 3 02 Power Consumption Operating 110 VA Idle 40 VA 1 3 03 Power Frequency 120 VAC 60 Hz 2 230 240 VAC 50 60 Hz 2 Microline 590 591 Service Handbook 1 3 Specifications 1 4 ENVIRONMENTAL CONDITIONS 1 4 01 Acoustic Rating Letter Quality Mode 53 dBA Quiet Mode 50 dBA 1 4 01 Altitude 10 000 feet 3 050 meters 1 4 03 Ambient Temperature and Relative Humidity RH While operating 41 to 104 F 5 to 40 C Operating humidity 20 to 80 RH While in storage 14 to 122 F 10 to 50 C Storage humidity 5 to 95 RH 15 AGENCY APPROVALS 1 5 01 Listings UL No UL Standard No 1950 CSA No CSA Standard 22 2 950 FCC FCC Certified per Part 15 Subject J Class B TEC TEC 950 VDE VDE 0805 VDE 0875 Class B BS BS 7002 Specifications 1 4 Microline 590 591 Service Handbook 1 6 1 6 01 Character Matrix Sizes
42. oY En 153 E so spom Avge pesy 1uabipejur jeuas WOY DOYd Er v9 X 9 ssayaady at uondo ABD OBE viva DISLIVE asl dW3L H DA Microline 590 591 Service Handbook 2 2 Principles of Operation Program ROM Location 05D 27C1024 This 64k x 16 bit Mbit EPROM contains the control program for the printer The MPU executes the instructions contained in this muaox LI LIL LT LILLIE Ben EAN The Program ROM is assigned to the rc AN program memory area of the MPU PSEN N TT AT ee AA and instructions are fetched by the E ie aan PSEN signal of the MPU DO D15 2 02 tif RAM Location 05E 5116647 The RAM is CMOS dynamic RAM with 65 536 words x 16 bit configuration and is used as a receive buffer print buffer and work buffer 7 Write 8 bit bus byte instruction 16 bit bus word instruction Clockout is provided when the original excitation is selected 2 03 tif Microline 590 591 Service Handbook 2 3 Principles of Operation Character Generator ROM CG ROM Location 05C 27C4096 This 256k x 16 bits 4 Mbit masked EPROM contains the character data for the various fonts The CG ROM is assigned MPu Berl E ed Laika Balk ET EN u area of the MPU The data is accessed by the E EN A e E A aan PSEN signal of the MPU PSEN N pa TON a A pss O Program Program Program 2 04 tif EEPROM Electrically Erasable Programmable ROM EEPR
43. of Operation 2 1 05 Print Control The print data is transmitted as serial data from the LSI to the control circuit and the driver contained in the printhead After the data is printed the sensor analog circuit controlling each pin returns the pin stroke data to the MPU The MPU will make an automatic head gap adjustment This feedback system sets the optimum drive time for each pin in order to maintain high print quality ono Print Head Logic section Sensor analog section 2 09 tif LSI Printhead Interface The connection between the LSI and the printhead is made with the bi directional serial data bus The LSI transmits the print data as serial data to the logic circuit of the printhead The printhead returns serial data from the printhead sensor analog circuit to the LSI This information is used to determine the optimum drive time for the next print request The logic circuit of the printhead signals the LSI if a parity error is detected in the print data _cuk VE Oe a a E ee HDspATA TIMO INDIRA DARE HDSCLK ee ae an la 7 HDSLT a Bee Ai ERR Normal NS les Ki ee ERR parity error Se E cs CO 2 10 tif Principles of Operation 2 8 Microline 590 591 Service Handbook Gap Adjust Control The Gap Adjust LSI receives stroke length information for all of the printhead pins from the sensor analog circuit The Gap Adjust LSI then sets the optimum printhead gap for the printing medium NOTE Refer
44. rotate smoothly If 1t does not remove the cause of the binding 2 Defective line feed motor Replace the line feed motor Drifting Margin Possible Causes 1 Power OFF the printer Move the carriage assembly The carriage should move smoothly If it does not remove the cause of the binding 2 Refer to the next section and or Technical Service Bulletin 3309 Microline 590 591 Service Handbook 4 15 Failure Analysis This page was intentionally left blank Failure Analysis 4 16 Microline 590 591 Service Handbook Left Margin Drifting Problem NOTE This information is also provided in Technical Service Bulletin 3309 To correct a problem with the left margin drifting during print operations follow this procedure 1 Manually slide the carriage assembly back and forth along the full length of the carriage shaft Check for drag caused by the ribbon a dirty space rack or other obstructions If you suspect that the ribbon is causing movement problems check the movement of the carriage assembly with the ribbon removed OR with a new ribbon installed Check the contact between the carriage frame and the space motor board assembly Contact is made at the front edge of the board Any gap will keep the space motor gear from fully engaging with the space rack This will result in slippage problems which will affect spacing operations Check the printhead cable connections between the main control board and the spac
45. the Microline 590 Single Bin with envelope capability Paper Width 7 2 to 8 5 18 3 cm to 36 3 cm Paper Length 10 1 to 14 25 6 cm to 35 6 cm Capacity 170 sheets 16 1b 100 sheets 20 lb The CSF 5001 is a wide feeder for the Microline 591 Single Bin with envelope capability Paper Width 7 2 to 14 3 18 3 cm to 36 3 cm Paper Length 10 1 to 14 25 6 cm to 35 6 cm Capacity 170 sheets 16 1b 100 sheets 20 lb Pull Tractor Kit The Pull Tractor Kit P N 70023001 is a narrow feeder for the Microline 590 The Pull Tractor Kit P N 70023201 is a wide feeder for the Microline 591 Bottom Feed Rear Feed For Push Pull Operation Paper Types Continuous Feed and Labels 1 10 03 Color Ribbon Kit Includes Color mechanism Color Ribbon End user installable Specifications 1 22 Microline 590 591 Service Handbook 1 10 04 Bottom Push Tractor Kit NOTE The Bottom Push Tractor Kit P N 70022901 is a narrow feeder for the Microline 590 The Bottom Push Tractor Kit P N 70023101 is a wide feeder for the Microline 591 Bottom Feed Paper Type Continuous Feed Includes Stand and Metal Tear Bar 1 10 05 Serial Interface Super Speed 19 2K RS 232C Ready Busy X On X Off Protocols Can be configured through the Menu or OKISmart Utility Program 1 10 06 Roll Paper Stand Adapts printer for use with roll type paper Model 590 only Includes Stand Support Cord and DIN plug for connection to printer 1
46. timing and carriage position detection timing Microline 590 591 Service Handbook SP truth table HALL AMP INPUT OUTPUT o yw H 2 14 pcx 1 720 e UTILITY MODE IPT 10 12 15 CPI Eeee 11 20 p IPT 17 20 CPI lt 1 240 gt e LQMODE IPT 10 12 15 1 360 17 20 CPI A 2 16 pcx 2 11 Principles of Operation 2 1 07 Operation Panel The Serial I O Port Ports 20 23 of the MPU reads the operation panel switch data from the operation panel control LSI Location IC1 BUS1485 The Serial I O Port also outputs LED data to the operation panel control LSI A two byte 15 bits 1 parity bit even parity command OPTXD is transmitted from the MPU to the operation panel LSI in synchronization with the OPCLK signal Once the LSI decodes the command the command must pass a command code check and have no parity errors Then the specified I O control will return the two byte command response to the MPU OPLT N and Data latch P20 OPCLK N P22 rg Command LED Driver P23 P21 er SH controller ae z Principles of Operation 2 12 Microline 590 591 Service Handbook PueWWO gt ay Buipo gt ap a 0J2q pauinjes aq ue asuodsas aU 1241 OS paxil 812 GXYdO JO E Hq 07 0 Hq ay asnecaq SISIYL DW sues y 4e ind3no ase asuodsas puewwo SY pue Puewiuos ay 184 335 UBD NOA aaoge volleitsnjjlayy Woy 310N VOISSHISUB 119 10 volpnasuj ON 40 40404 y3ay asuodsay sevisne peas eje
47. to Section 2 2 03 for a Poweron ce SE Gap Print Number of Number of Max description of the mechanical 539 head pressure Meets rhicknes gaprange 9 p aper 1P Gap paper mm process es a Print instruction All values in the chart are in millimeters iP 0 10 s gap range at 6 or above Pressure sensitive paper Setting of gap is SP or more range at5 interleaf paper is 4P or more E Envelope Appropriate gap Preliminary printing setting gap levels 6 7 8and 9 Appropriate gap setting gap levels 1 2 3 4and 5 Print Compensation Control The printhead compensates for the shape of the platen as shown below NOTE Refer to Section 2 1 08 Head Drive Time PrintHead 45 shown in the drawing left since the stroke length up to the platen is different for each pin the information of each pin within the print head is fed back to the logic circuit from the sensor analog circuit to set the optimum drive time for each pin by controlling the pin coil current for each pin Pin coil current Microline 590 591 Service Handbook 2 9 Principles of Operation 2 1 06 Space and Line Feed SP LF Motor Control The LSI Location 02D MSM79V035 generates the space motor and the line feed motor control signals according to commands received from the MPU These signals are sent to the SP LF motor driver SP Motor MSM79V035 MHM2025 Distri pri butor Driver LF overdrive registe
48. to the center of the platen careful the printhead may be HOT and lift off the ribbon cartridge Check the ribbon shield If it is loose secure it in place properly If it is missing locate it and install Static electricity causes the paper to stick In cold dry weather static charges can build up on continuous form paper This can make the paper cling to the paper separator If you have this problem during high volume printing jobs try moving the single sheet paper guides on the separator together so that the paper rests on the guides rather than on the separator itself The Print Quality and Character Pitch buttons on the front panel won t work The Operator Panel Function Item on the printer MENU can be used to disable these buttons If the printer is part of a customized system or if it is used by a number of people the system manager may have used this option to make sure the printer is always set properly NOTE This feature also prevents access to the Menu To access the Menu power OFF the printer then hold down the SEL key while powering ON Microline 590 591 Service Handbook 4 11 Failure Analysis 6 Strange symbols and incorrect fonts appear on the output when a document is printed The printer driver that is engaged does not agree with the emulation selected for the printer To check the emulation selected first make sure that paper is loaded Then press the SEL and SHIFT buttons simultaneously to enter t
49. toward the center of the platen With the support protector in this position the ribbon protector and the support protector prevent the leading edge of the paper from curling or folding Once the paper is ejected the printhead slowly moves towards the left bracket The support protector is latched in the stored position when it is pushed to approximately 5 mm from the left bracket vo gt m About 5mm Ribbon protector Platen Printhead Carriage frame assembly Microline 590 591 Service Handbook 2 35 Principles of Operation 2 2 08 Automatic Paper Load The Microline 590 591 printers will automatically detect cut sheet paper and feed the paper to the TOP OF FORM position Cut Sheet Paper Set the change lever to the TOP FEED position NOTE When the change lever is in the TOP FEED position the cut sheet detection lever contacts the cut sheet detection switch BASW which is located on the main control board Insert the sheet of paper between the platen and the paper chute Once paper is detected at the paper end sensor and the amount of time selected on the Wait Time setting of the menu has lapsed the line feed motor will feed the paper until the leading edge of the paper reaches the top of form position Sheet setting Time out PE y Detection timer k a el time selected on the menu LF action Change lever Cut sheet Cut sheet detection lever detection switch ei sated ans Bonome Cut she
50. 01 Paper Chute Assembly W Maintenance 3 42 Microline 590 591 Service Handbook x o a fe T mn amp Maintenance 43 3 Microline 590 591 Service Handbook 3 2 21 Line Feed Motor Assembly Perform these procedures 3 2 01 3 2 06 3 2 07 3 2 16 3 2 20 and 3 2 21 Firmly press down on the line feed motor assembly 1 while tilting the assembly out 1 2 3 Remove the line feed motor assembly 4 Remove the line feed connection cord 2 CAUTION The line feed idle gear 3 should be removed only if it must be replaced The claws will break when the gear is removed A new gear must be installed L P N 51228401 Gear Line Feed Idle L P N 56510301 Motor Line Feed Assembly L P N 56627201 Cord Connection Line Feed Maintenance 3 44 Microline 590 591 Service Handbook 3 2 21 pcx Microline 590 591 Service Handbook 3 45 Maintenance 3 2 22 Reset Spring CAUTION Please read through this entire procedure before performing it Do not press against the vertical extensions of the reset spring at any time during this procedure Firm pressure will release the spring not brute force Perform these procedures 3 2 01 3 2 06 and 3 2 17 Place the right side of the unit over the edge of your work surface You must be able to access the bottom of the unit You will be working underneath and above the reset spring 1 at the same time Reach from underneath the unit and press up at the e
51. 4 9 02 Printhead Interconnect Diagram Control Board to Printhead NOTE The printhead coil resistance values ARE NOT LISTED The individual printwire control lines CANNOT be accessed on this printhead Connector pin number ontroll Carriage Motor board section nean a EP EP EP EP EL 5V RST N ELS 10V 5V5 HDSLT N HDSDATA N HDSCLK N CLK ERR Failure Analysis 4 56 Microline 590 591 Service Handbook 4 9 03 Line Feed Motor Resistance The resistance of each coil should be approximately 13 ohms Pin number of LE Motor Connector pin number 1 2 3 4 5 6 7 8 4 9 04 Space Motor Resistance The resistance of each coil should be approximately 5 ohms Pin number of SP Motor Connector pin number SP U SP V SP W PHASE A PHASE B 5V EL Microline 590 591 Service Handbook 4 57 Failure Analysis This page was intentionally left blank Failure Analysis 4 58 Microline 590 591 Service Handbook APPENDIX A BOARD DIAGRAMS A 1 OVERVIEW A 1 01 General Information This section describes the characteristics of the printed circuit boards PCBs used in the printer The following areas are covered Firmware Fuses Jumpers Sensors Switches Test Points Where an item is not applicable the word NONE will be listed Microline 590 591 Service Handbook A 1 Board Diagrams INDEX TO CHARTS Description Board Designation Section Main Controller Board AKGI
52. 48 Microline 590 591 Service Handbook Loopback Connector Configuration 1 Jumper the following pins together Pin 2 to Pin 3 Pin 4 to Pin 5 Pin 8 to Pin 11 Pin 6 to Pin 20 Name Name Ea Secondary Transmitted Data en T ransmit Clock Received Data Request to send Clear to send Data Set Ready Recelver Clock Unassigned Secondary Request to Send Unassigned Secondary Carrier Detect RS232 C Serial Loopback Test Connector DB25P Plug 4 8 04 tif Microline 590 591 Service Handbook 4 49 Failure Analysis Serial Cable Information The information in this section will help you make a serial cable to connect between the printer and computer Refer to the computer documentation to determine the cable requirements on the computers end The printer has the following cable requirements e Shielded RS 232C cable UL and CSA approved No more than 50 feet long Cannon DB 23P plug or equivalent with 25 pins e Cannon DB C2 J9 or equivalent connector shell Serial Interface Signal Requirements Signal Symbol Direction Description Protective Ground PG Ground Connected to the printer frame Transmit Data TD From Printer Serial data transmitted to the system Receive Data RD To Printer Serial data received by the printer Request to Send From Printer Always set to low mark Not Used Data Set Ready To Printer Indicates that data can be sent
53. 56302 Service Handbook Document N A N A 59254703 Printer Handbook Document N A N A 57519501 Service Videotape Document N A N A 52062704 Label Service Videotape Spine Document N A N A 53570401 Sleeve Videotape Cardboard Document N A N A P N 58229003 Microline 590 591 Service Training Kit This kit replaces P N 58229002 Items in the training kit except for the Printer Handbook are NOT available separately Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 Procedure 58229003 Kit ML590 591 Service Training Document N A N A Both 52062706 Label Kit Document N A N A 58088103 Read Me First Document N A N A 59256303 Service Handbook Document N A N A 59254703 Printer Handbook Document N A N A 57519502 Service Videotape Document N A N A 52062704 Label Service Videotape Spine Document N A N A 53570401 Sleeve Videotape Cardboard Document N A N A Microline 590 591 Service Handbook B 35 Illustrated Parts Listing This page was intentionally left blank Illustrated Parts Listing B 36 Microline 590 591 Service Handbook OKIDATA an OKI AMERICA company Microline 590 591 Service Handbook P N 59256303
54. 61 6C 20 64 75 6D 70 2E 0D OA ecimal dump Procedure Follow these steps to engage the Hexadecimal Dump Mode Make sure the printer is connected to a computer Verify that paper is loaded Verify that the ribbon and printhead are correctly installed Power OFF the printer Press and hold the SEL and FF LOAD switches while powering on the printer Hold the switches until the printer prints the line Hex Data Dump The printer is ready to receive data in the Hexadecimal Dump Mode Send data to the printer from the computer To exit Hexadecimal Dump Mode power OFF the printer Failure Analysis 4 52 Microline 590 591 Service Handbook Hex Data Dump 1b 70 42 16 18 t 1 6 R x 1 16 15 30 a ae Oiler ee IEC 18 72 84 18 oe I 0 30 06 0B 36 6 9 4 8 00 04 3F 08 ag 32 BB 88 3r de 0b 96 00 ao 4 8 05 tif Microline 590 591 Service Handbook 4 53 Failure Analysis 4 9 RESISTANCE CHECKS 4 9 01 General Description The charts on the following pages provide information needed to determine if the printhead and motors used in the printer are defective NOTE The printhead coil resistance values ARE NOT LISTED The individual printwire control lines CANNOT be accessed on this printhead Failure Analysis 4 54 Microline 590 591 Service Handbook Layout Diagram Centro connector ACconnector Print head Switch Space motor 4 6 01a pcx Microline 590 591 Service Handbook 4 55 Failure Analysis
55. A 2 01 Operator Panel Board LEOP A 2 02 Power Supply Assembly N A A 2 03 Space Motor PCB N A A 2 04 RS232 C Serial Interface Board LXHI A 2 05 Board Diagrams Microline 590 591 Service Handbook Centro connector AC connector Switch Space motor Microline 590 591 Service Handbook A 3 Board Diagrams A 2 01 Main Controller Board AKGI Firmware 05C CG ROM Character Generator 05D EPROM Printer Control Program NOTE If a 4 Mbit Masked ROM is in location 05D there SHOULD NOT be a ROM in location 05C However make sure that jumper SP1 is placed on the A Side Fuses Fl soldered 1 amp protects the 40 vdc motor drive circuit Jumpers SP1 EPROM Address Select Jumper A Side 4 Mbit Masked ROM is in location 05D B Side CGROM Location 05C and EPROM Location 05D are installed Sensors SNS1 Rear Top Feed Paper Out Sensor SNS3 Bottom Feed Paper Out Sensor Switches BASW Paper Path Select Switch Test Points 5 vdc Logic LED Drive Voltage CN3 Pins 5 and 6 8 vdc Serial Interface Line Voltage CN3 Pin 11 8 vdc Serial Interface Line Voltage Comparator Voltage CN3 Pin 10 12 vdc Printhead Analog Voltage CN3 Pin 9 40 vde Printhead Space Motor Line Feed Motor Drive Voltage CN3 Pins 1 and 2 Frame Ground CN3 Pins 3 and 4 Logic Ground CN3 Pins 7 and 8 ALM Alarm Signal to the Power Supply Board CN3 Pin 12
56. AABCOGLOINTIXEMMOPQRATUVHATEL I obodetghi jh i rinoparaduvwxys 7 F nagwa b 6 fM L2S4BE TBS EG est ABODEFCHIJMTUM ROP OMMPUYNXTZS 1 ahodefgnt ikimnopgrstuvnzyzii 4 8 03 tif Microline 590 591 Service Handbook 4 47 Failure Analysis 4 8 04 Serial Interface Loopback Test NOTE In order to run this test the serial interface board must be installed with a serial loopback test connector attached to it To perform the serial interface loopback test follow these steps 1 Place the printer in the Serial Diagnostic mode Set the Diagnostic Test menu item to YES Power off the printer Attach the loopback connector to the serial port Install continuous feed paper Power on the printer The message LOOP TEST will be printed The size of the Message Buffer will be printed Three different messages may be printed next If the message OK is printed next the message buffer has been tested and no problems were found If the message BAD is printed next there is a problem with the message buffer If the message IF BAD is printed the signal logic was tested and a problem was found Hexadecimal characters 20 through 7F are transmitted through the transmit data line The receive data line receives the characters The message buffer then stores the characters The data is then printed The test will run until the printer is powered off or the SELECT switch is pressed Failure Analysis 4
57. Area to be Lubricated Disassembly Lubricant Amount Procedure Visible Bearings of Gears in Gear Case Assembly 3 2 04 Oil Small Bearing of Pull up Roller Shaft 3 2 05 Grease Medium Contact between Idie Gear Bearing and Pull up Roller Shaft 3 2 05 Grease Medium Contact of Space Motor Assembly Gear and Space Rack 3 2 11 Oil Small Contact between Platen Shaft and Platen Ground Spring 3 2 19 Grease Small Contact between Bias Gear and Platen Gear 3 2 19 Oil Small Bearing of Change Lever 3 2 23 Grease Medium Bearing and Pivot Point of Change Lever 3 2 23 Grease Medium Pivot Point of Release Cam 3 2 24 Grease Medium Holders on Pressure Spring 3 2 24 Grease Medium Bearing of Front Release Gear Arm 3 2 24 Grease Medium Carriage Shaft 3 2 25 Oil See NOTE NOTE Place a small amount on the surface then wipe clean Front Release Gear Shaft Grease Medium Contact between Front Roller Holder and Front Pressure Roller Oil Small Bearing of Tractor Gear Grease Medium Contact between Lower Tractor Feed Shaft and Main Frame Grease Medium 3 5 06 Areas Not Lubricated Lubricant should never contact the parts listed below 1 2 3 4 5 6 7 8 Ribbon Platen Assembly Rubber Face Pressure Roller Rubber Face Tractor Pins Head Cable Space Motor Printed Circuit Board Electrical Contacts and Connections Space Rack Microline 590 591 Service Handbook 3 91 Maintena
58. Bottom Narrow Option 590 N A 70023101 N A Kit Push Tractor Bottom Wide Option 591 N A 52106003 N A Color Kit Incl color ribbon and ribbon shift bracket Option Both N A 52106002 N A Ribbon Color Consumable Both N A 51709101 3PA4025 3581 G1 Bracket Ribbon Shift Color Option RSPL Both N A 70023301 N A Kit Roll Paper Stand Option 590 N A 70016301 N A Buffer Expansion Card Option Both N A 70000803 N A Kit Parallel Interface Plug n Play Accessory Option Both N A 70012801 N A Kit RS232 C Serial Interface Option Both N A 56412201 4YB4049 1708P1 Power Supply 230 240V Option RSPL 590 3 2 08 56412202 4YB4049 1708P2 Power Supply 230 240V Option RSPL 591 3 2 08 56624101 3YS4011 1265P1 Cord AC 220V ML Right Ang Option RSPL Both 3 2 01 56624401 3YS4011 1268P1 Cord AC 240V Option RSPL Both 3 2 01 NOTE Illustrated Parts Listing The Microline 590 591 printers are not shipped with an interface cable The end user must purchase an interface cable separately from the printer B 24 Microline 590 591 Service Handbook ltems 8 9 10 11 12 and 13 are not shown B 2 07 pcx Microline 590 591 Service Handbook B 25 Illustrated Parts Listing B 2 09 Option Parts Part numbers are subject to change R
59. ENU Seiting by Actual Page Length Model 591 only Appears only when optional Roll Paper Stand is installed Appears only when IBM Proprinter emulation is selected ES Optional color ribbon must be installed to print colors other than black FE ER Appears only when Epson LQ emulation is selected ET Appears only when optional Serial Interface is installed x Appears only when optional Cut Sheet Feeder is installed Microline 590 591 Service Handbook 3 79 Maintenance Factory default settings are printed in Bold Italic The tables show all possible menu settings available with the Microline 590 591 What you will actually see depends on the active emulation and the options installed Group Item Setting Set Up Graphics Uni directional bi directional Receive Buffer Size 64K 1 line 32 K Paper Out Override No Yes Print Registration O 0 05 mm Left 0 10 mm Left 0 15 mm Left 0 20 mm Left 0 25 mm Left 0 25 mm Right 0 20 mm Right 0 15 mm Right 0 10 mm Right 0 05 mm Right Operator Panel Function Full Operation Limited Operation Reset Inhibit No Yes Print Suppress Effective Yes No Auto LF No Yes Auto CR No Yes SI Select Pitch 10 CPI 17 1 15 cpi SI Select Pitch 12 CPI 20 12 cpi Time Out Print Valid Invalid Auto Select No Yes Smoothing Valid Invalid Ribbon Selection Black Ribbon Black Yellow Magenta Cyan Violet Orange Green Printh
60. ION THREE MAINTENANCE 3 1 OVERVIEW 3 1 01 3 1 02 3 1 03 General Information Maintenance Tools Maintenance Precautions DISASSEMBLY ASSEMBLY PROCEDURES General Information 3 2 01 3 2 02 3 2 03 3 2 04 3 2 05 3 2 06 Preliminary Items Printhead Assembly Ribbon Protector Gear Case Assembly Pull up Roller Assembly Upper Cover Access Cover and Sheet Guide Assemblies 3 2 07 Control Board AKGI 3 2 08 Power Supply Assembly 3 2 09 Operator Panel PCB LEOP 3 2 10 PC Connector 3 2 11 Space Motor and Roller Guide Assemblies 3 2 12 Carriage Cable 3 2 13 Space Rack 3 2 14 Roller Holder Backup Assembly 3 2 15 Guide Rail and Adjust Cam 3 2 16 Left Ground Plate 3 2 17 Right Ground Plate 3 2 18 Rear and Cut Sheet Paper Feed Sensor Levers 3 2 19 Platen Assembly 3 2 20 Paper Chute Assembly 3 2 21 Line Feed Motor Assembly 3 2 22 Reset Spring 3 2 23 Idle Gear and Change Lever 3 2 24 Pressure Spring 3 2 25 Carriage Shaft 3 2 26 Leaf Spring 3 2 27 Bottom Paper Sensor Levers 3 2 28 Front Pressure Roller Assembly 3 2 29 Tractor Assembly 3 2 30 Main Frame PRINTER ADJUSTMENTS 3 3 01 General Information 3 3 02 Printhead Gap Adjustment General Information Procedure Setup Phase Printhead Gap Modification Phase Parallel Adjustment Phase Recheck Phase 3 3 03 Key Combinations 3 3 04 Menu Operation General Information Menu Mode Printing the Menu Sample Menu Reset Menu to Factory Defaults Limited Oper
61. Manually rotate the platen Does the platen rotate smoothly Yes GotoA No Is the left platen gear broken Yes Replace the platen assembly End of procedure No Is the line feed idle gear broken Yes Replace the line feed motor assembly or the line feed idle gear End of procedure No Are the right platen gear idle gear and or change gear broken Yes Replace the respective assembly End of procedure No Set the change lever to the rear position Does the platen rotate smoothly Yes Replace the tractor feed assembly End of procedure No Check the gears on the tractor feed assembly and platen assembly for broken or missing teeth Replace the defective assembly Go to A Failure Analysis 4 34 Microline 590 591 Service Handbook A Replace the line feed motor assembly Has the problem been resolved Yes End of procedure No Replace the main control board Has the problem been resolved Yes End of procedure No Contact Technical Support Microline 590 591 Service Handbook 4 35 Failure Analysis This page was intentionally left blank Failure Analysis 4 36 Microline 590 591 Service Handbook RAP 09 Operation Panel Malfunction START The operation panel does not function properly Do the operation panel LEDs light when power is applied Yes Make sure the cable from CN1 of the operation panel is properly connected to CN7 on the main control board Go to A No Check the F1 fuse on the main control
62. NOPRRSTUVNKYZI I LQ Gothic 10CPTI IRSA 0123456799 3 lt gt 28ABCDEFGHIJKLMNOPQRSTUVWXYZ N1 _ abcdefghijk Imno pgrstuvwxyr 1 E 8 812314557891 lt gt 7BABCDEFGHIJKLMNOPQASTUYWAYZ N1 _ abcdePghnijkimnmoporstuvwxryz ITE tS 01239456789 lt gt BABCDEFGHIJKLMNOPO RSTUVWXYZ 1 1 _ abcdefghidk Imnapqrstuvuxyz LQ Prestige 1 CPI ESA 81294567695 lt a gt GABCOBPGHLJELMNOPQRSTUYWLYZ _ abcdefghi iklano parstuvexy2 ESTE 78123456799 lt m gt 2 PABCDEFGHIJRLMNOPQRSTUYHAYZI Y1 _ ebcdefghi ijklanopg aturwxyz y 1 RE C 4 61234567891 lt gt T ABCDEFGHIJKLHNOPQ RSTUVWEYZ 4 _ ebcdefghi jklanopyrstuywxyzt Utility 10CPI ABRE C44 01235678917 m FRABCDEFEHTIKLMNDPARSTUVWEYZLN abedefghi Jkimno parctuvyxyz i 1 9 88 r 8123086789 u 7BABCDEFSHT IK LANOPORSTUVWXYZ YI _ abedefghi jkimnoparstuvwxyz 137 I M S5 1 U123456789 4 gt PRABCDEF AHL IK LANOPO RSTUVWKYZE _ abcdefghi jkimnoparstuvweyztl LQ Swiss 19Point amp 8123456789 lt gt ABCDEFG HI JKLMNOPGRSTUVWXYZL 1 _ abedefghiikImno parstuvwxyz l 1 4 8 B12345678 9 lt gt ABCDEFGH JKLMNOPQRSTUVWXYZE 17_ abcedefghiikImnopqrstuvwxyz LQ Super 3ub 12CPI Eraku t err 0121456789 4 lt gt TRABCDEFCHIJELNBOPORETUFHZEZEN 1 ebodefghi jel mnopqratuvexys Y Frasu 3tr B12I026709 3 lt gt T
63. OM Location 03C 93CS46 The EEPROM is a CMOS serial I O Es type memory which is capable of nn electrically erasing and writing 3 un 1 024 bits eN JU LPL yy Ly u Address Start code 0d The EEPROM contains the menu data y NAN py and the head drive time correction data 20 A 015 DODIS DO DIS Read cycle timing READ Start Operation Sant cade Address Data INEA EDEN Bus Ready lt lt twp gt Write cycle timing WRITE 2 05 tif Principles of Operation 2 4 Microline 590 591 Service Handbook Location 02D MSM 79V 035 Detects the output of the two phase sensor on the DC space motor to control the motor drive phase Transmits and receives serial Clockout data to and from the printhead based on the dot timing which 2 E AAA BE is derived from the space LSICS A a motor speed ALE io eae Controls the external interface The LSI is connected to the ae Data MPU ora QUES ee DO D15 ia WRL Se i ss Clockout is provided when the original excitation is selected 2 06 tif Microline 590 591 Service Handbook 2 5 Principles of Operation 2 1 03 Initialization This printer is initialized when the printer is powered on or when the I PRIME N signal is input from the host via the parallel interface 5 TETON MPU LSI Resetting Printer Initialization occurs as listed below and Initial setting The RST N signal is output from the Reset circuit to reset
64. Okilink II Appendices A and B Appendices A and B contain charts illustrations and an illustrated parts list to support you in servicing the product Appendix A Appendix A contains information about the printed circuit boards PCBs This appendix includes reference charts which present data regarding function firmware fuses jumpers sensors switches and test points An illustration of each board is also included Appendix B Appendix B is an illustrated parts listing of the product This listing is cross referenced to Section 3 of the Service Handbook Assigned Tasks C Look through Appendix A and Appendix B in the Service Handbook Microline 590 591 Service Handbook 1 9 Course Administration Maintenance Disassembly Assembly Assigned Tasks C Read Section 3 2 of the Service Handbook L View the videotape CAUTION Okidata does not recommend performing the disassembly assembly procedures on a product which is operating normally Therefore you are not required to perform the disassembly assembly procedures to complete this training Adjustments and Service Checks This section explains the adjustments performed after parts replacement Hardware replacement may require adjustments to firmware settings This section also explains viewing and resetting counters Assigned Tasks L Read Section 3 3 of the Service Handbook L Perform the procedures listed in Section 3 3 of the Service Handbook Clean
65. P1 Roller Pressure Rear Narrow RSPL 590 3 2 20 53341401 3PB4025 3517P1 Roller Pressure Rear Wide RSPL 591 3 2 20 50097501 3PA4025 3330G1 Tractor Assembly Narrow RSPL 590 3 2 29 50097502 3PA4025 3330G2 Tractor Assembly Wide RSPL 591 3 2 29 Illustrated Parts Listing B 20 Microline 590 591 Service Handbook B 2 05 pcx Microline 590 591 Service Handbook B 21 Illustrated Parts Listing B 2 07 Carriage Assembly Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Item Okidata P N Oki J P N Description Comments Refer to B 1 02 Disassembly Procedure 50707401 3PP4025 3431P1 Clamp Head RSPL Both 3 2 03 53562801 3PP4025 3430P1 Protector Ribbon RSPL Both 3 2 03 51228501 3PA4025 3406G1 Gear Case Assembly RSPL Both 3 2 04 56729601 224A1285P0400 Connector PC HD40 RSPL Both 3 2 10 53343001 4PP4025 3433P1 Holder Connector L RSPL Both 3 2 11 53343101 4PP4025 3434P1 Holder Connector R RSPL Both 3 2 11 56510401 4YA4025 3250G1 Motor Space Assembly RSPL Both 3 2 11 53343301 4PA4025 3719G1 Guide Roller Assembly Both 3 2 11 53341901 4PP4025 3398P1 Roller Guide RSPL Both 3 2 11 53342001 3PP4025 3399P1 Holder Guid
66. Product Updates Document N A N A Refer to Okilink N A Recommended Spare Parts List Document N A N A Refer to Okilink N A Software N A N A Refer to Okilink N A Technical Service Bulletins Document N A N A Refer to Okilink N A Marketing Literature Document N A N A N A Okidata Marketing Literature Order Document N A N A Form To order Marketing Literature complete an Okidata Marketing Literature Order Form Fax the completed form to Okidata Marketing Communications Obtain this form by faxing a request to Okidata Marketing Communications Refer to the Service Center Reference Guide for information on contacting Okidata See the following pages Microline 590 591 Service Handbook B 33 Illustrated Parts Listing B 2 13 Service Training Kit Revision List P N 58229001 Microline 590 591 Service Training Kit This kit was replaced by P N 58229001 Items in the training kit except for the Printer Handbook are NOT available separately Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 Procedure 58229001 Kit ML590 591 Service Training Document N A N A Both 52062701 Label Box Document N A N A 58229101 Administration Package Document N A N A 58088001 Envelope Administration Package Document N A N A 58088101 Cover Letter Document N A N A 59256201 Training Guide Document N A N A 58088201 Printhead Gap Adjustment Material Document N A
67. Rear Bottom Feed for continuous feed paper When the continuous feed paper is used either with the rear tractor optional bottom tractor or optional pull tractor place the change lever in the Rear Bottom Feed position When the change lever is placed in this position the reset spring pushes the change gear In this position the idle gear is engaged with the bottom tractor unit drive gear and the tractor gear As the platen turns power is transferred from the platen gear to the idle gear to the change gear and to the push tractor shaft Cut sheet detection switch MainP C B Cut sheet detection lever gt Change ES X lever N Platen gear R N AN N Y Tractor gear Change gear Drive gear Bottom tractor unit Reset spring 2 32 tif Microline 590 591 Service Handbook 2 31 Principles of Operation Cut Sheet Paper Feed Operation As the line feed motor rotates power 1s transferred through decelerating gears line feed idler gear platen gear to the platen Stepping motor When using cut sheet paper the LF motor change lever must be in the TOP position so the platen and pressure rollers can feed the paper This also disengages the push tractor LF Idler gear Continuous Paper Feed Rear Tractor Mechanism 2 33 tif As the platen rotates power is transferred to the tractor gear from the platen gear the idler gear and the change gear The tractor gear drives the pin tractor belts which
68. Remove the roller holder backup assembly 3 NOTE The roller holder backup assembly includes the backup roller 4 the backup roller holder 5 and the pin 6 P N 53343201 Assembly Roller Holder Backup P N 53341701 Roller Back Up P N 53341801 Holder Back Up Roller P N N A Pin P N N A Backup Roller Holder Spring Maintenance 3 30 Microline 590 591 Service Handbook 3 2 14 pcx Microline 590 591 Service Handbook 3 31 Maintenance 3 2 15 Guide Rail and Adjust Cam Perform these procedures 3 2 01 3 2 02 3 2 04 3 2 11 and 3 2 14 Rotate the adjust cam 1 in the direction of arrow A as far as possible 1 2 3 Pull the cam out and remove it 4 Carefully press the claw 2 location only in the base frame down to release the guide rail 3 Do not press too hard or the claw will break Use a straight slot screwdriver to slide the guide rail in direction of arrow A 6 Lift the guide at position B and work the other end of the guide free to remove the guide rail Remove the ground clip 4 NOTE Installation After installing the guide rail check the printhead gap adjustment Refer to Section 3 3 of this Service Handbook P N 51009701 Guide Rail Ground Clip P N 51009801 Guide Rail Narrow P N 51009901 Guide Rail Wide P N 53067701 Cam Adjust Maintenance 3 32 Microline 590 591 Service Handbook x a 15 T SN mn Maintenance 3 33 Microline 590 591
69. Service Handbook 3 2 16 Left Ground Plate 1 Perform these procedures 3 2 01 3 2 06 and 3 2 07 2 Cutthe nylon tie and release the cable Not shown 3 Work the left ground plate 1 up and then out to remove it P N 51010301 Plate Left Ground RSPL Maintenance 3 34 Microline 590 591 Service Handbook 3 2 16 pcx Microline 590 591 Service Handbook 3 35 Maintenance 3 2 17 Right Ground Plate Perform these procedures 3 2 01 and 3 2 06 Pull the top tabs 1 of the right ground plate 2 out to free the plate from the claws of the base frame You may have to use a screwdriver to work the plate tabs free Lift the plate and remove it NOTE Installation The plate must be securely seated under the claws C P N 51010201 Plate Right Ground Maintenance 3 36 Microline 590 591 Service Handbook 3 2 17 pcx Microline 590 591 Service Handbook 3 37 Maintenance 3 2 18 Rear and Cut Sheet Paper Feed Sensor Levers Perform these procedures 3 2 01 3 2 06 3 2 07 and 3 2 16 Turn the cut sheet continuous feed paper sensor lever 1 until the flag is at the top then work the lever free 3 Remove the lever Turn the rear feed paper sensor lever 2 until the flag is at the top then work the lever free Remove the lever L P N 50804902 Lever Sensor Cut Sheet Continuous C P N 50804801 Lever Rear Sensor Maintenance 3 38 Microline 590 591 Service Handbook x ra a
70. T sharply bend the carriage cable You will slightly bow the cable to position it under the claws and over the projection L P N 56627301 Cable Carriage Narrow L P N 56627302 Cable Carriage Wide Maintenance 3 26 Microline 590 591 Service Handbook x re a ai T EN mn Maintenance 3 27 Microline 590 591 Service Handbook 3 2 13 Space Rack Perform these procedures 3 2 01 3 2 02 3 2 04 3 2 10 and 3 2 11 Remove the spring 1 1 2 3 Disengage the claws 2 on the both ends of the space rack 3 4 Pull the space rack straight up and remove it NOTE Installation After installing the space rack check the printhead gap adjustment Refer to Section 3 3 of this Service Handbook Cleaning When cleaning refer to Section 3 4 of this Service Handbook CAUTION Do NOT lubricate the space rack Lubricating the space rack will attract dust If enough dust accumulates on the space rack printing problems will occur C P N 50923501 Spring Tension Space Rack L P N 53563301 Rack Space Narrow C P N 53563401 Rack Space Wide Maintenance 3 28 Microline 590 591 Service Handbook Maintenance Microline 590 591 Service Handbook 3 29 3 2 14 Roller Holder Backup Assembly Perform these procedures 3 2 01 3 2 02 3 2 04 and 3 2 11 Use a small straight slot screwdriver to disengage the claws of the backup roller holder spring 1 from the carriage frame 2
71. a different paper path the printhead will travel back and forth The pins are gently fired to sense paper thickness and set the printhead gap Microline 590 591 Service Handbook 3 83 Maintenance This page was intentionally left blank Maintenance 3 84 Microline 590 591 Service Handbook 3 3 07 Tear Feature NOTE Tear is activated by pressing TEAR It is a manual procedure FORMS TEAR OFF is activated by changing a setting in the Menu It is an automatic procedure General Information This feature allows a printed page rear or bottom feed continuous form to be torn off without wasting paper or adjusting the printer Tear Feature advances the paper from the initial printing position to the tear off position The top of the page perforation will be even with the tear bar The tear bar is located under the clear top of the access cover Paper will remain in the tear off position until the printer receives data Then the paper is retracted to the initial print position To activate the Tear Feature press TEAR Microline 590 591 Service Handbook 3 85 Maintenance 3 3 08 Forms Tear Off NOTE Tear is activated by pressing TEAR It is a manual procedure FORMS TEAR OFF is activated by changing a setting in the Menu It is an automatic procedure General Information This feature allows a printed page rear or bottom feed continuous form to be torn off without wasting paper or adjusting the printer F
72. aintenance 3 2 03 Ribbon Protector CAUTION You MUST use a straight slot screwdriver to release the ribbon protector If you attempt to lift the protector without releasing the tabs the protector will break Perform these procedures 3 2 01 and 3 2 02 Open the pull up roller cover 1 3 Use a straight slot screwdriver to release the extensions 2 from the carriage frame set 3 Lift the ribbon protector 4 straight up and remove it P N 53562801 Protector Ribbon RSPL Maintenance 3 8 Microline 590 591 Service Handbook 3 2 03 pcx Microline 590 591 Service Handbook 3 9 Maintenance 3 2 04 Gear Case Assembly Perform these procedures 3 2 01 and 3 2 02 Use a straight slot screwdriver to release the four claws 1 of the gear case assembly 2 Lift and remove the gear case assembly NOTE Lubrication When lubricating refer to Section 3 5 of this Service Handbook C P N 51228501 Gear Case Assembly Maintenance 3 10 Microline 590 591 Service Handbook gt qu Ue Ld K N WN A MN SA if A AS D A y y a Maintenance 11 3 Microline 590 591 Service Handbook 3 2 05 Pull up Roller Assembly Perform this procedure 3 2 01 Open the access cover 1 Open the cover of the pull up roller assembly 2 Press at A while rotating the assembly towards the back of the printer Remove the assembly NOTE Lubrication When lubricating ref
73. arriage shaft 3 2 25 Vacuum Cloth and All purpose cleaner Space Rack 3 2 13 Vacuum Paper Paths N A Vacuum Cloth and All purpose cleaner Platen 3 2 19 Cloth and Platen cleaner Covers 3 2 06 Cloth and All purpose cleaner Microline 590 591 Service Handbook 3 89 Maintenance 3 5 LUBRICATION 3 5 01 General Information If the lubrication procedures are not performed properly the printer will require more frequent cleaning Excessive lubricant attracts dust and accumulations build up quickly An accumulation of paper dust is the most frequent cause of print quality problems in a dot matrix printer 3 5 02 Lubrication Schedule Routine inspection and lubricating should be performed 1 once a year or 2 every 600 hours of operating time 3 5 03 Lubrication Types 1 Machine Oil or equivalent 2 Moly lube Grease or equivalent 3 5 04 Lubrication Amounts Do NOT over lubricate the printer Operational problems are caused by excess lubricant The excess lubricant causes dust to accumulate These accumulations can jam gears or cause print problems The Lubrication Table will direct you to use the following amounts of lubricant 1 Medium Oil three to four drops Grease thin coating approximately 015 inch 2 Small Oil one drop Grease extremely thin coating approximately 008 inch Maintenance 3 90 Microline 590 591 Service Handbook 3 5 05 Lubrication Table
74. arrow P N 50922801 Spring Front Pressure Wide P N 53341101 Holder Front Roller C P N 53341202 Roller Front Pressure Maintenance 3 58 Microline 590 591 Service Handbook x a 15 T N mn Maintenance 3 59 Microline 590 591 Service Handbook 3 2 29 Tractor Assembly 1 Perform these procedures 3 2 01 3 2 06 3 2 07 3 2 16 3 2 17 3 2 19 3 2 20 3 2 22 3 2 23 and 3 2 24 Use a needle nose pliers to release the claw of the tractor gear 1 and remove the gear 3 Remove the change gear 2 Raise the lock levers 3 on the left 4 and right 5 tractor assemblies Slide the lower tractor feed shaft 6 in the direction of arrow A and remove the shaft This shaft is square Slide the upper tractor feed shaft 7 in the direction of arrow A and remove the shaft This shaft is round Remove the left tractor assembly the guide 8 and the right tractor assembly NOTE Installation The tractors must be synchronized Align the synchronization marks 9 in the same direction Verify that the guide holes 10 in the tractor drive gears are facing the same direction The left tractor assembly must be positioned to the left line feed motor side of the plastic tab and ground plate Lubrication When lubricating refer to Section 3 5 of this Service Handbook C P N 50097501 Tractor Assembly Narrow C P N 50097502 Tractor Assembly Wide C P N 51228001 Gear Change
75. ation General Information Procedure Menu Settings 3 3 05 Top of Form General Information Setting Top of Form Reset the Top of Form to Factory Default 3 3 06 Paper Park General Information Procedure Continuous Feed to Single Sheet Procedure Single Sheet to Continuous Feed 3 3 07 Tear Feature General Information 3 3 08 Forms Tear Off General Information Reset Menu to Factory Defaults Reset the Top of Form to Factory Default CLEANING 3 4 01 General Information 3 4 02 Cleaning Schedule 3 4 03 Cleaning Tools 3 4 04 Areas to be Cleaned LUBRICATION 3 5 01 General Information 3 5 02 Lubrication Schedule 3 5 03 Lubrication Types 3 5 04 Lubrication Amounts 3 5 05 Lubrication Table 3 5 06 Areas Not Lubricated SHIPPING INSTRUCTIONS 3 6 01 Return for Service 3 6 02 All Other Returns vil SECTION FOUR FAILURE ANALYSIS 4 1 OVERVIEW 4 1 01 Introduction 4 1 02 Printer Serial Number Identification REPORTING PROBLEMS 4 2 01 General Information 4 2 02 Problem Lists 4 2 03 Reporting Methods Okilink II Course Critique Fax Number Mailing Address Information Provided TROUBLESHOOTING UPDATES 4 3 01 General Information 4 3 02 Okilink I 4 3 03 Faxable Facts 4 3 04 Technical Service Bulletins TROUBLESHOOTING TIPS 4 4 01 Preliminary Checks 4 4 02 Problem Categories ALARM Lamp Blinks Fatal Errors Operational Errors ALARM Lamp Lights Paper End Jam Conditions 4 4 03 START HERE Flowchart 4 4 04 Tips for Preve
76. being stripped DO NOT DISENGAGE THE ADJUST GEAR Printhead Gap Modification Phase Slide the carriage assembly to the left side of the platen Check the printhead gap Use a 0 014 inch or 0 35 mm feeler gauge The printhead gap must measure 0 014 0 001 inch 0 35 0 03 mm Use a large straightened paper clip Figure 1 B to push down on the adjust gear This will disengage the adjust gear from idle gear D Use a small phillips screwdriver to turn the adjust screw Figure 1 C Turning the screw CLOCKWISE will increase the printhead gap Turning the screw COUNTERCLOCKWISE will decrease the gap 9 Slide the carriage assembly to the right side of the platen Parallel Adjustment Phase 10 Check the printhead gap at the right side of the platen 11 If the gap measurements are different between the left and right positions turn the adjust cam as follows Figure 2 B Turning the cam CLOCKWISE will increase the printhead gap Turning the cam COUNTERCLOCKWISE will decrease the printhead gap Recheck Phase 12 Check the printhead gap adjustment at the left right and center of the platen 13 If the printhead gap is not the same at all three positions return to step 6 Maintenance 3 68 Microline 590 591 Service Handbook Adjust screw Adjustgear Press paper clip here j Idie gear D Left Right A dieg y end Center end e E Clockwise Gap Increases Adjust gear Q2 Counter clockwise Adjust screw Gap Decreases
77. bles for Okidata products Orders are placed through Okidata s Logistics Department Please refer to your Service Center Reference Guide for details on ordering parts You should have the following information available before you place your order Okidata Dealer Authorization Number Okidata Customer Number Your Purchase Order Number Okidata Part Number s Use this Appendix Okilink II Faxable Facts or contact Okidata Technical Support to find the correct part number Refer to the Service Center Reference Guide for information on contacting Okidata Microline 590 591 Service Handbook B 7 Illustrated Parts Listing B 2 CHARTS Below is an index to the illustrated parts breakdown charts Section Description B 2 01 Printer B 2 02 Upper Cover Assembly B 2 03 Printer General Assembly B 2 04 Printer Unit 1 of 3 B 2 05 Printer Unit 2 of 3 B 2 06 Printer Unit 3 of 3 B 2 07 Carriage Assembly B 2 08 Options B 2 09 Option Parts B 2 10 Consumables B 2 11 Packing Materials B 2 12 Documentation B 2 13 Service Training Kit Revision List Illustrated Parts Listing B 8 Microline 590 591 Service Handbook Sheet Guide Assembly Access Cover Assembly Upper Cover AC Power Cable Power Supply Assembly Pull up Roller Assembly Control Board gt Q fob YN YN lt p amp O m Cc S 2 fa _ o e Main Frame B 2 00 pcx
78. ches 0 28 mm Maximum including backing Bottom Refer to the Printhead Gap Information Section 1 6 Use Bottom Feed and or optional Pull Tractor for card stock and labels Transparency NOTE Roller marks may mar the transparency under high temperature high humidity conditions Weight Width Length Thickness Paper Feed Path Printhead Gap Information 12 to 24 Ibs 45 to 90 g m Microline 590 7 2 to 8 5 inches 18 2 to 21 5 centimeters Microline 591 7 2 to 14 3 inches 18 2 to 36 3 centimeters 3 to 17 inches 7 62 to 43 18 centimeters 0 14 inches 0 36 millimeters Top Refer to the Printhead Gap Information Section 1 6 Microline 590 591 Service Handbook 1 17 Specifications 1 7 02 Length NOTE The recommended length is specific to paper type Rear Feed Minimum 3 inches 7 62 centimeters Maximum 17 inches 43 18 centimeters Bottom Feed Minimum 3 inches 7 62 centimeters Maximum 17 inches 43 18 centimeters Top Feed Minimum 3 inches 7 62 centimeters Maximum 17 inches 43 18 centimeters Number of Copies Original 4 Interleaf Original 4 Carbonless Original Cut Sheet Thickness 0 014 inches 0 36 mm Maximum Thickness Rear Feed 0 017 inches 0 44 mm Maximum Thickness Bottom Feed Specifications 1 18 Microline 590 591 Service Handbook 1 7 05 Weight NOTE The recommended weight is specific to paper type Minimum 9 Ib 35 g m Maximum 24 lb 90
79. cific to the Microline 591 printer This part is used by both the Microline 590 and Microline 591 printers Microline 590 591 Service Handbook B 5 Illustrated Parts Listing B 1 03 Parts Ordering Information Service Center Reference Guide When a technician has successfully completed a Service Training Course for a product and the Dealer has become Service Authorized an information package is provided to the Dealer The Okidata Service Center Reference Guide outlines the following items e Responsibilities of Okidata Service Centers e Spare parts and consumables information e Procedures for warranty repairs Product Training Certification and Authorization Product Support information Okidata Depot information and services Third Party Service information Information about Okidata s Customer Information Center e Okidata Service and Support telephone numbers The Service Center Reference Guide contains the procedures to follow for ordering parts Please read understand and follow these procedures Service Authorization for a specific product must be obtained before a Dealer can submit warranty claims Direct questions regarding the Service Center Reference Guide to Okidata Dealer Service Refer to the Service Center Reference Guide for information on contacting Okidata Illustrated Parts Listing B 6 Microline 590 591 Service Handbook Placing a Parts Order All authorized Okidata resellers may order spare parts and consuma
80. cing information Item Okidata P N Oki J P N Description Comments Refer to B 1 02 Disassembly Procedure 53563101 3PA4025 3720G1 Frame Main Narrow RSPL 590 3 2 30 53563201 3PA4025 3721G1 Frame Main Wide RSPL 591 3 2 30 51228001 4PP4025 3340P1 Gear Change RSPL Both 3 2 29 51228101 3PP4025 3341P1 Gear Tractor RSPL Both 3 2 29 50805301 3PP4025 3352P1 Cam Release RSPL Both 3 2 24 51228201 4PP4025 3353P1 Gear Idle RSPL Both 3 2 23 50805101 2PP4025 3354P3 Lever Change RSPL Both 3 2 23 50923201 3PP4025 3355P1 Spring Reset RSPL Both 3 2 22 51010201 3PP4025 3386P1 Plate Right Ground RSPL Both 3 2 17 50098301 3PA4025 3370G1 Platen Assembly Narrow RSPL 590 3 2 19 50098302 N A Platen Assembly Wide RSPL 591 3 2 19 53341501 3PA4025 3440G2 Roller Pull Up Assembly Narrow RSPL 590 3 2 05 53341601 3PA4025 3530G2 Roller Pull Up Assembly Wide RSPL 591 3 2 05 Illustrated Parts Listing B 18 Microline 590 591 Service Handbook B 2 04 pcx Microline 590 591 Service Handbook B 19 Illustrated Parts Listing B 2 06 Printer Unit 3 of 3 Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Item Okidata P N Oki J P N
81. ck that the head gap is set properly Has the problem been resolved Yes End of procedure No Contact Technical Support Failure Analysis 4 30 Microline 590 591 Service Handbook RAP 05 Printhead Pins Not Firing START Missing dots on output Verify that the printhead gap is set correctly Ensure the carriage cable is making firm contact with CN7 on the main control board and the space motor assembly Inspect both ends of the carriage cable for worn edges Has the problem been resolved Yes End of procedure No Replace the printhead Has the problem been resolved Yes End of procedure No Replace the main control board Has the problem been resolved Yes End of procedure No Replace the carriage cable Has the problem been resolved Yes End of procedure No Replace the space motor assembly Has the problem been resolved Yes End of procedure No Contact Technical Support Microline 590 591 Service Handbook 4 31 Failure Analysis RAP 06 Poor Print Quality START Is the print head gap properly set Yes GotoA No GotoB A Replace the printhead Has the problem been resolved Yes End of procedure No GotoC C Replace the main control board Has the problem been resolved Yes End of procedure No Check that the carriage cable is making good contact with the main control board and the carriage assembly Replace the cable if it is worn or bent Has the problem been resolved Yes End of procedure No Contact Technica
82. correct position and you are using rear feed lift up the paper separator and check to be sure that the paper is properly on the tractors and has not jammed If the paper lever is in the correct position and you are using the optional bottom feed push tractor check the bottom tractor unit to be sure that the paper is properly installed on the tractors and that the paper has not jammed Once the paper is correctly loaded press and release the SEL button then hold the SHIFT button and press the RESET Character Pitch button Word processor files do not print the way the MENU and front panel are set Before sending a file to the printer many word processors send either an initialization string or an I Prime signal to the printer The initialization string contains codes that reset the printer to a default set of features Otherwise the printer might accidentally print using features set for a previous job These codes will override the panel or MENU settings To set your printer to ignore the reset codes enter the printer MENU hold down the SHIFT button while pressing SEL MENU button and change the Reset Inhibit item in the Setup Group to Yes Please note that while this will stop the reset code from resetting your printer other codes in the initialization string may still override the printer MENU and or front panel settings The I Prime signal is sent over the parallel interface pin 31 and will automatically override any settin
83. ctions in the training materials are listed in the Training Section of Okilink II The Technical Service Bulletins also known as Okidata s Monthly Mail are available via Okilink II Situations that are NOT addressed in the reference documentation technical service bulletins or round tables may be reported to the Dealer Service and Support Engineers Contact Technical Support or the Technical Training Group You will receive a response to your message within one business day The information on Okilink II is the most accurate and up to date technical information available from Okidata This is only possible with your assistance By reporting your suggestions concerns and problems Okidata can provide the best possible information Your cooperation is greatly appreciated Thank you for your help Failure Analysis 4 4 Microline 590 591 Service Handbook 4 2 03 Reporting Methods Okilink Il You may use Okilink II to report your findings Refer to the Service Center Reference Guide for information on using Okilink IL Course Critique Use the Course Critique to report any problems you find as you are completing the self paced training Fax Number If you wish to fax your response please use the numbers listed in the Service Center Reference Guide Mailing Address If you respond by mail please use the appropriate address listed in the Service Center Reference Guide Information Provided Please provide the following informa
84. d Page Width 13 6 8 Page Length 11 11 2 3 12 14 17 3 3 5 4 5 5 6 7 8 8 5 Gap Control Auto Gap Semi Auto Gap 1 2 3 4 5 6 7 8 9 CSF Bin2 Line Spacing 6 LPI 8 LPI Bottom Margin Valid Invalid Page Width 13 6 8 Page Length 11 11 2 3 12 14 17 3 3 5 4 5 5 6 7 8 8 5 Gap Control Auto Gap Semi Auto Gap 1 2 3 4 5 6 7 8 9 Model 591 only er Appears only when optional Roll Paper Stand is installed Gye te Appears only when IBM Proprinter emulation is selected ee Optional color ribbon must be installed to print colors other than black ea Appears only when Epson LQ emulation is selected RER Appears only when optional Serial Interface is installed Appears only when optional Cut Sheet Feeder is installed Microline 590 591 Service Handbook 3 81 Maintenance 3 3 05 Top of Form General Information Top of Form is the distance from the top edge of the paper to the first print position on the page The red line on the ribbon protector indicates the baseline of the Top of Form Setting Top of Form Deselect the printer The SEL lamp must not be lit To set the TOF further down the page press and hold the SHIFT switch while pressing the FF LOAD switch This will advance the paper in micro increments To set the TOF higher on the page press and hold the SHIFT switch while pressing the LF switch T
85. defghijklmnopqratuvwxyz 7 1 9 4 01234568799 lt gt GABCDEFGHIT _ ebcdefghiikimnoparstuvwayz 7 1 45 8 0123456789 3 lt gt BABCDEFGHIIK 117 abedefahiikimnoporstuvwava 7 Iraak 612345567991 lt gt 28 ABCDEFGHIIKL 4 8 02 tif Microline 590 591 Service Handbook 4 45 Failure Analysis 4 8 03 Font Test General Information The font test is a one page sample printout of each available typeface 10 cpi Letter Quality Courier 10 cpi Letter Quality Roman 10 cpi Letter Quality Swiss 10 cpi Letter Quality Orator 10 cpi Letter Quality Gothic 10 cpi Letter Quality Prestige 10 cpi Utility 18 point Letter Quality Swiss 12 cpi Letter Quality Superscript Subscript At the top of the test is the printer type 1 emulation 2 country 3 and firmware revision level 4 This information is often required while performing service or when contacting Okidata Have this test available during your service call CAUTION Running the test without paper loaded will allow the printhead to print on the platen This will dirty the platen cause excessive wear of the ribbon and may damage the platen ribbon and printhead Procedure Follow these steps to print the font test 1 Load the paper 2 Power off the printer 3 Press and hold the LF switch while powering on the printer You must hold the LF switch until the test starts to print The one page test will print then stop Fail
86. ding Forms Tear Off Paper Loading Auto Loading Top Feed Press LOAD switch for Bottom Rear Feed Microline 590 591 Service Handbook 1 9 Specifications 1 6 16 Paper Out Detection Distance from end of paper Rear Feed 0 5 inches 12 7 mm Bottom Feed 0 5 inches 12 7 mm Top Feed 0 5 inches 12 7 mm 1 6 17 Paper Tear Capabilities Forms Tear Off sharp edge on access cover Metal Tear Bar with optional bottom tractor unit Specifications 1 10 Microline 590 591 Service Handbook 1 6 18 Print Method Printhead Type General Information Impact Dot Matrix 24 pin printhead 0079 inch 20 millimeter diameter pins Overheat Protection When printhead temperature exceeds 110 degrees Celsius the printer stops bi directional printing Uni directional printing begins If the temperature exceeds 115 degrees Celsius printing stops Printing will resume when the printhead temperature drops below 115 degrees Celsius NOTE Refer to Section Two for more information on printhead operation Microline 590 591 Service Handbook 1 11 Specifications Printhead Gap Information Three items factor into printhead gap information 1 Printhead Gap Adjustment This is a SERVICE ADJUSTMENT made by a technician It is covered in Section 3 3 of this Service Handbook The Adjustment measures 0 014 0 001 inches 0 35 0 03 mm 2 Printhead Gap Adjust This is a MENU ITEM in the SET UP Group It fine tunes t
87. e motor Solid contact MUST BE made at all connections or print problems will occur Check the condition of the printhead cable If it is broken torn or sharply bent replace the cable If the problem continues check the parts listed below in the order given Replace the suspected part Be sure to test the printer after replacing each part 1 Carriage Frame Set 2 Motor Space 3 Rack Space 4 Cable Printhead 5 Board Main Control 6 Ifthe problem continues check all assemblies and connections Then contact Okidata Technical Information for further assistance Microline 590 591 Service Handbook 4 17 Failure Analysis 4 6 FAULT ALARMS 4 6 01 General Information Follow these guidelines when using the Troubleshooting Tables Record the status OFF solidly ON Flashing of the Operator Panel LEDs Go to to the Troubleshooting Table Index Section 4 6 02 1 2 3 Look for the LED Indications you have observed 4 The Reference Number in the column at the right side of the Troubleshooting Table Index directs you to the appropriate item in the Troubleshooting Tables Section 4 6 03 The Troubleshooting Tables will provide a Failure Description Probable Cause and Recommended Action The Recommended Action will direct you to the actions listed below Follow a specific RAP Replace items in a listed order Failure Analysis 4 18 Microline 590 591 Service Handbook 4 6 02 ALARM LED Display Troubl
88. e motor assembly Remove the space motor assembly NOTE The guide roller assembly includes the guide roller 8 the guide roller holder 9 and the pin 10 Installation Position the guide roller assembly first The contact side of the cable faces down when the carriage cable is inserted into the connector on the space motor assembly Work the cable from side to side until it is fully seated in the connector No contacts should be visible After installing the space motor assembly check the printhead gap adjustment Refer to Section 3 3 of this Service Handbook When lubricating refer to Section 3 5 of this Service Handbook P N 53343001 Holder Connector L RSPL P N 53343101 Holder Connector R RSPL P N 56510401 Motor Space Assembly RSPL P N 53343301 Guide Roller Assembly P N 53341901 Roller Guide P N 53342001 Holder Guide Roller ee ae Ed nal M9 A P N N A Pin Maintenance 3 24 Microline 590 591 Service Handbook 3 2 11 pcx Microline 590 591 Service Handbook 3 25 Maintenance 3 2 12 Carriage Cable Perform these procedures 3 2 01 3 2 06 3 2 07 and 3 2 11 Slightly bow the carriage cable 1 to release it from the claws 2 and the projection on the main frame 3 Remove the carriage cable NOTE Installation The contacts on the cable face up when the cable is positioned on the main frame The cable end with the 45 angled contacts connects to the gear case assembly Do NO
89. e Administration When the printhead temperature exceeds 110 degrees Celsius the printer will need replacing switch to unidirectional print alternate between unidirectional print and bi directional print come to an immediate stop According to the Printer Handbook the OkiSmart software is comprised of three programs which can be used instead of the printer s front panel to control and or set many of the printer s parameters A True B False Which of the following settings is not a factory default setting for the serial interface configuration A Parity Even Serial Data 8 bits Protocol Ready Busy Baud Rate 9600 bps Course Administration 1 18 Microline 590 591 Service Handbook Which of the following FAULT ALARMS displayed on the operator panel indicates a PRINTHEAD GAP ALARM A ALARM lamp flashing UTILITY ON 10 cpi ON 20 cpi ON B ALARM lamp flashing PROP ON PRESTIGE ON Es ALARM lamp flashing UTILITY ON 10 cpi ON SEL ON D ALARM lamp flashing PROP ON 20 cpi ON The customer states that the left margin position drifts during printing Your first troubleshooting action is to replace the main control board make sure that the printhead cable connections are solid replace the space motor manually slide the carriage assembly to check for drag Microline 590 591 Service Handbook 1 19 Course Administration What is the recommended ambient temperature and r
90. e Roller RSPL Both 3 2 11 N A N A Pin Both 3 2 11 N A 4PP4025 3401P1 Guide Roller Spring Both 3 2 11 56627301 2PU4007 1193P1 Cable Carriage Narrow RSPL 590 3 2 12 56627302 N A Cable Carriage Wide RSPL 591 3 2 12 53343201 4PA4025 3718G1 Assembly Roller Holder Backup Both 3 2 14 53341701 4PP4025 3392P1 Roller Back Up RSPL Both 3 2 14 53341801 3PP4025 3393P1 Holder Back Up Roller RSPL Both 3 2 14 N A N A Pin Both 3 2 14 N A 4PP4025 3397P1 Backup Roller Holder Spring Both 3 2 14 50098901 4PP4025 3394G1 Carriage Frame Set RSPL Both 3 2 25 Illustrated Parts Listing Microline 590 591 Service Handbook x 2 re F N a Illustrated Parts Listing 23 B Microline 590 591 Service Handbook B 2 08 Options Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Item Okidata P N Oki J P N Description Comments Refer to B 1 02 Disassembly Procedure 70022501 N A Kit Single Bin CSF Narrow Option 590 N A 70022701 N A Kit Single Bin CSF Wide Option 591 N A 70023001 N A Kit Pull Tractor Narrow Option 590 N A 70023201 N A Kit Pull Tractor Wide Option 591 N A 70022901 N A Kit Push Tractor
91. ead 3 2 02 Space Motor Assembly 3 2 11 Space Rack 3 2 13 Guide Rail 3 2 15 Platen Assembly 3 2 19 Carriage Shaft 3 2 25 Maintenance 3 2 Microline 590 591 Service Handbook 3 2 DISASSEMBLY ASSEMBLY PROCEDURES General Information This section contains the printer disassembly procedures Only the removal procedures are explained here Reverse the procedure for the installation At the bottom of each procedure is a listing of the parts covered in that procedure The Okidata part number item description comment RSPL Option Consumable and cross reference to Appendix B is provided for each part Items included in the Recommended Spare Parts List are indicated by the acronym RSPL N A will appear where a part number is not available 590 indicates that the item is specific to the Microline 590 591 indicates that the item is specific to the Microline 591 Both indicates that the item is common to both printers LJ Part Item Comment Appendix B Number Description Reference This Service Handbook lists the disassembly procedures for major components of the unit Okidata DOES NOT recommend disassembling a unit which is operating normally If you decide to perform disassembly during this training Okidata recommends that you perform only the disassembly procedures for RSPL items All other procedures are provided to assist you in identifying parts It is not likely that you will perform these procedures while servicin
92. ead Gap Adjust 0 1 1 Graphics Speed High Low Model 591 only Appears only when optional Roll Paper Stand is installed Appears only when IBM Proprinter emulation is selected e Optional color ribbon must be installed to print colors other than black ee ee Appears only when Epson LQ emulation is selected BEE Appears only when optional Serial Interface is installed gt x x Appears only when optional Cut Sheet Feeder is installed Maintenance 3 80 Microline 590 591 Service Handbook Factory default settings are printed in Bold Italic The tables show all possible menu settings available with the Microline 590 591 What you will actually see depends on the active emulation and the options installed Group Setting Parallel I F I Prime Buffer Print Buffer Clear Invalid Pin 18 5v Open Auto FeedXT Invalid Valid Serial F Parity None Odd Even Serial Data 7 8 Bits 8 Bits 7 Bits Protocol Ready Busy X ON X OFF Diagnostic Test No Yes Busy Line SSD SSD DTR RTS Baud Rate 19200 9600 4800 2400 1200 600 300 bps DSR Signal Valid Invalid DTR Signal Ready on Power Up Ready on Select Busy Time 200 ms 1 sec CSF Bin 1 Line Spacing 6 LPI 8 LPI Bottom Margin Valid Invali
93. eck operation before replacing next item in list 1 Operation Panel 2 Power Transformer Has the problem been resolved Yes End of procedure No Contact Technical Support Failure Analysis 4 24 Microline 590 591 Service Handbook A Remove the cable from CN7 of the main control board Then power ON the unit Do the operation panel LEDs light No Go to B Yes Power OFF the unit Remove the printhead Power ON the unit Has the problem been resolved Yes Replace the printhead Has the problem been resolved Yes End of procedure No Go to B No Replace the following in the order listed below Check operation before replacing next item in list Ribbon Feed Mechanism Carriage Cable Main Control Board 4 PROMOSCA Has the problem been resolved Yes End of procedure No Contact Technical Support Microline 590 591 Service Handbook 4 25 Failure Analysis RAP02 No Spacing Operation START The alarm LED blinks Is the carriage assembly binding or jammed No Make sure the carriage cable is properly connected to the space motor assembly and CN7 on the main control board Go to A 1 Remove the ribbon to verify that the ribbon is not jammed 2 Remove the space motor assembly 3 Inspect the teeth on the space rack and the space motor gear 4 Goto A A Has the problem been resolved Yes End of procedure No Is the fuse F2 on the main control board open No Go to B Yes Replace the main contro
94. efer to Okilink II for current part numbers and pricing information Item Okidata P N Oki J P N Description Comments Refer to B 1 02 Disassembly Procedure 50097901 N A Tractor Pull and Bottom Assembly Right Option RSPL Both N A 50098001 4PA4025 3608G1 Tractor Pull and Bottom Assembly Left Option RSPL Both N A 50098501 2PA4094 6510G3 Stand Bottom Push Right Option RSPL Both N A 50098502 2PA4094 6510G4 Stand Bottom Push Left Option RSPL Both N A 50098701 4PP4094 7385G1 Knife Paper N Bottom Push Tractor Option RSPL 590 N A 50098801 4PP4094 7386G1 Knife Paper W Bottom Push Tractor Option RSPL 591 N A 50098101 2PP4094 7383G1 Tractor Cover Assembly N Pull Tractor Option RSPL 590 N A 50098201 2PP4094 7384G1 Tractor Cover Assembly W Pull Tractor Option RSPL 591 N A 53067401 1PP4053 2574P1 Cover Side Left Cut Sheet Feeder Option RSPL Both N A 53067501 1PP4053 2575P1 Cover Side Right Cut Sheet Feeder Option RSPL Both N A 53563001 4PP4053 2547G1 Shoe Brake Cut Sheet Feeder Option RSPL Both N A 55937301 4YA4050 3026G1 PCB NCSF Cut Sheet Feeder Option RSPL Both N A 56627501 3YS4011 5120G1 Cable CSF Cut Sheet Feeder Option RSPL Both N A 51010001 1PP4053 2570P2 Guide Front Sheet N Cut Sheet Feeder O
95. elative humidity RH for the Microline 590 591 while operating A 41 F to 104 F 20 to 80 RH 41 F to 104 F 10 to 70 RH 41 F to 104 F 20 to 50 RH 41 F to 104 F 20 to 90 RH The Rolling ASCII Test is a continuous printout of all ninety six ASCII characters Use this test to check left margin alignment that the correct data is being sent from the host computer the ability of the printer to select various fonts All of the above Course Administration 1 20 Microline 590 591 Service Handbook Which of the following is not part of the OkiSmart software programs OKISmart Manager OKISmart Control OKISmart Panel Emulator OKISmart Setup Refer to RAP 02 After determining that the carriage is jammed and the ribbon is not jammed your next step should be to install a new space motor turn the power Off then On remove the space motor assembly and inspect the teeth on the space rack and space motor gear replace fuse F1 on the main controller board Microline 590 591 Service Handbook 1 21 Course Administration You are replacing the line feed motor assembly The line feed idle gear is part of this assembly You can remove the line feed idle gear from the motor assembly WITHOUT breaking the claws The EXACT SAME gear can be re installed A True B False To reset TOP OF FORM to the factory default setting 1 inch power OFF the printer Then press and hold the QUIET and
96. ented Okidata technology does away with the manual head gap adjustment The Microline 590 591 actually reads and learns the media you feed in then automatically adjusts the head gap to the optimum distance This autogapping process leads to longer printhead life An optional user installable Color Kit coupled with a customer provided color software package allows the printers to add impact to graphics charts transparencies and text presentations Additional options include the Bottom Feed Push Tractor Cut Sheet Feeder Pull Tractor and Serial Interface Board The Microline 590 is an 80 column printer The Microline 591 is a 132 column printer Okidata s extended two year limited warranty covers the parts labor and printhead on both printers The following items are included with the printer OKISMART Typer software which provides the flexibility for the Microline 590 591 to function like a typewriter on checks labels and envelopes OKISMART Panel a utility program that lets you control selected printer functions from your personal computer Scalable Fonts 14 scalable fonts available on diskette NOTE The OkiSmart software includes three programs 1 OkiSmart Control gt OkiSmart Panel Emulator 3 OkiSmart Setup Refer to the Printer Handbook for more information Microline 590 591 Service Handbook 1 1 Specifications 1 2 PHYSICAL SPECIFICATIONS 1 2 01 Dimensions NOTE Dimensions INCLUDE the platen
97. er to RAP 11 Microline 590 591 Service Handbook 4 9 Failure Analysis 4 4 04 Tips for Preventing Image Problems 1 Make sure that the ribbon is not dried out If the printer output is faded install a new ribbon then print another sample Make sure that the paper you are using is within specifications Paper specifications can be found in Section 1 of this Service Handbook Failure Analysis 4 10 Microline 590 591 Service Handbook 4 4 05 Common Problems 1 Nothing happens when the unit is powered on The unit may not be plugged in Check the power cord connection to the outlet and to the printer If a power strip is being used make sure that it is powered ON Check to be sure that an external fuse hasn t blown or that a circuit breaker hasn t tripped The printer does not print when the computer sends data The printer may be deselected If the SEL light is out press the SEL button to select the printer The printer cable may not be securely connected Check the cable to be sure that it is properly connected to both the PC and the printer If you have installed the serial interface board check to be sure that the board is firmly seated in the printer A brand new ribbon has been installed and the printing is smeared and streaked The plastic shield on the ribbon is either loose or missing The shield must be left on the ribbon when you are installing the cartridge To remedy this situation move the printhead
98. er to Section 3 5 of this Service Handbook C P N 53341501 Roller Pull Up Assembly Narrow C P N 53341601 Roller Pull Up Assembly Wide Maintenance 3 12 Microline 590 591 Service Handbook 3 2 05 pcx Microline 590 591 Service Handbook 3 13 Maintenance 3 2 06 Upper Cover Access Cover and Sheet Guide Assemblies Perform this procedure 3 2 01 Pull the platen knob 1 straight out and remove it 1 2 3 Set the change lever 2 to the bottom feed position toward the rear of the printer 4 Insert a flat blade screwdriver into the grooves 3 of the frame and pry the upper cover 4 away from the frame Raise the front side of the upper cover assembly Tilt the upper cover assembly toward the rear to disengage the claws not shown at the rear of the frame Lift the upper cover assembly and remove it CAUTION Do not rotate the access cover past the vertical when removing it or you will break the tab extensions 8 Raise the access cover assembly 5 until it is vertical then lift it straight up to remove it 9 Remove the sheet guide assembly 6 10 Note the position of the cover B lt for card slot gt 7 This is part of the upper cover and should not be removed No font cards are currently available NOTE When cleaning refer to Section 3 4 of this Service Handbook P N 51009401 Guide Sheet Narrow RSPL P N 51009501 Guide Sheet Wide RSPL P N 53066901 Cover Upper Narrow RSPL P
99. es the pranger magnet the magnet attracts the armature This causes the reset spring to force the change gear downward The color idle gear rotates the change gear which turns the color change gear The color change gear turns the color cam shaft The rotation of the color cam shaft moves the color ribbon Space motor assembly holder up down to select the desired ribbon E color There is a cam at each setting of the color change gear When the change gear is at the top of the cam the change gear disengages from the color change gear At this time the armature resets changing the color band selection by one 2 30 tif setting Armature Reset spring Pranger ma gnet Color Idle gear FR Colar change gear Change gear 2 31 tif Microline 590 591 Service Handbook 2 29 Principles of Operation 2 2 05 Line Feed Mechanism The line feed operation is accomplished by activating the line feed motor which turns the platen The rotation of the platen is used to feed paper from the selected paper path Change lever Components of the paper feed mechanism are Release cam listed below Platen Line Feed Motor pulse motor with Gears Line Feed Idler Gear Platen Rear Tractor Feed Unit Front pressure roller Front release gear arm Front release gear shaft Pressure Roller Change Lever Paper Path Selection Lever The change lever is used to select one of three different paper paths top rear or bottom Paper
100. eshooting Table Index UTILITY PRESTIGE ORATOR Reference Number Shading Lamp Status OFF Ss ON Solid ON Flashing NOTE Reference Numbers 25 and 26 use identical Operator Panel displays Microline 590 591 Service Handbook 4 19 Failure Analysis 4 6 03 ALARM LED Display Troubleshooting Tables Reference Number Failure Description Cause Recommended Action 1 Space Motor Alarm Space motor IPT does not occur in specified time Refer to RAP 02 2 Printhead Detection Alarm Printhead does not home Refer to RAP 03 Printhead A D Alarm Thermistor is open or 5 vdc shorted Check the printhead connection then replace main control board carriage cable printhead Printhead Gap Alarm Self adjustment was not successful Check the printhead connection then replace the main control board carriage cable printhead Printhead Data Transfer Alarm Printhead parity error Replace main control board carriage cable printhead Printhead Type Alarm 9 pin printhead is connected in a 24 pin printer Replace the printhead with a 24 pin printhead Printhead Connection Alarm 1
101. etach the cable from connector CN2 1 of the power supply board 2 Detach the cable from connector CN3 3 of the control board 4 Use a straight slot screwdriver to release the claws and remove the cable clamp 5 Remove the cable 6 Release the tab and remove the cover 7 Remove the screw 8 and detach the ground cable 9 Lift the AC inlet 10 and the AC switch 11 from the main frame 12 A A er ot Remove the two screws 13 m oO Slide the power supply in the direction of arrow A to clear the claws of the base frame 11 Lift and remove the power supply assembly NOTE The 5 amp fuse is on the end of the board facing the AC inlet and the AC switch The 2 5 amp fuse is near the middle of the board When installing verify that the AC inlet and AC switch are oriented correctly P N 50707501 Clamp Cord RSPL B 2 02 P N 56302901 Fuse 2 5A 120V RSPL B 2 02 P N 56305901 Fuse GGS 5 120V RSPL B 2 02 P N 56306001 Fuse 3 15 A 230 240V Option RSPL B 2 08 P N 56306001 Fuse 3 15 A 230 240V Option RSPL B 2 02 P N 56412101 Power Supply 120V RSPL B 2 02 P N 56412102 Power Supply 120V RSPL B 2 02 P N 56412201 Power Supply 230 240V Option RSPL B 2 02 07 E a a N a P N 56412202 Power Supply 230 240V Option RSPL B 2 02 07 Maintenance 3 18 Microline 590 591 Service Handbook E 2 El A O lt 3 2 08 pcx Maintenance 19 3 Microline 590 591 Service Handbook 3 2 09 Operator
102. f paper without detecting a paper end condition causes the line feed operation to stop The line feed operation stops because the printer assumes a jam has occurred The operator can press the SEL switch to reset the ALARM LED and press the PARK switch to continue the park operation This operation may be useful when length of the paper to be parked is greater than 19 inches Paper end detection Vv LF vn GREEN D Reverse LF from P E Sensor to tri Reverse LF until paper end or 19 inches max 2 43 tif Principles of Operation 2 38 Microline 590 591 Service Handbook SECTION THREE MAINTENANCE 3 1 OVERVIEW 3 1 01 General Information This section lists the parts replacement adjustment cleaning lubrication and shipping procedures Disassembly should not be performed unless absolutely necessary NEVER perform disassembly on a malfunctioning printer until you have followed the failure analysis procedures in Section Four of this Service Handbook Follow the procedures listed in Adjustments and Service Settings Adjustments may be required when either consumable or parts are replaced Failure to perform these procedures could result in unnecessary service calls Proper performance of maintenance and cleaning will help to achieve the best possible print quality from the printer 3 1 02 Maintenance Tools The following tools are required to service the printer 2 Phillips Screwdriver with magnetic tip Straight slot
103. faulty components on the printed circuit boards are NOT addressed When troubleshooting a defective unit follow these steps 1 Refer to Section 4 3 which explains where to check for updates to the troubleshooting information Section 4 4 contains tips on preventing problems as well as a list of common problems Section 4 5 shows samples of abnormal outputs Section 4 6 provides tables of error messages 5 Section 4 7 contains the Repair Analysis Procedures RAPs Each RAP will ask you questions or require you to make observations The answers to these questions and the results of your observations determine your next course of action Use the RAP Index to identify which RAP should be used to resolve the problem with the machine Section 4 8 provides the procedures for various printer tests Section 4 9 lists the resistance check points Section 4 2 lists methods for reporting problems If you encounter a situation that is NOT addressed by the documentation in this kit please report the problem to Okidata using one of the methods listed Refer to the Service Center Reference Guide for information on contacting Okidata Microline 590 591 Service Handbook 4 1 Failure Analysis This page was intentionally left blank Failure Analysis 4 2 Microline 590 591 Service Handbook 4 1 02 Printer Serial Number Identification To identify the revision level of a printer record the serial number from the back of the printer Refer t
104. feed the continuous paper Continuous Paper Feed Pull Tractor Mechanism Bottom feed of continuous sheets is 2 34 tif possible only when an optional pull tractor unit is installed As the platen rotates power is transferred to Pull Bottom the drive gear from the LF idler gear the en platen gear idler gear B and idler gear A The drive gear turns the pull tractor assembly which feed the continuous paper Platen Platen gear LF Idle gear 2 36 tif Principles of Operation 2 32 Microline 590 591 Service Handbook Continuous Paper Feed Bottom Tractor Feed Mechanism As the platen rotates power is transferred to the drive gear from the platen gear the idle gear and the tractor change gear The drive gear turns the pin tractor belts on the bottom tractor feed unit to feed the continuous paper 2 37 tif Continuous Paper Feed Push Pull Tractor Mechanism This mechanism consists of an optional pull tractor and a standard push tractor mechanism Continuous paper is fed by these two N tractors at the same time Drive gear Idle gear Platen gear Platen 2 35 tif Microline 590 591 Service Handbook 2 33 Principles of Operation 2 2 06 Paper Detection Mechanism Top Feed Paper Detection When the cut sheet paper is inserted into the printer Point A of Paper Near End Lever B is pushed backward rotating Paper Near End Lever A As Paper Near End Lever A rotates it contacts the Rear Sensor Lever r
105. g m 1 7 06 Width NOTE The recommended width is specific to paper type Paper Microline 590 Minimum 3 5 inches 8 8 centimeters Maximum 10 5 inches 26 6 centimeters Microline 591 Minimum 3 5 inches 8 8 centimeters Maximum 16 5 inches 41 9 centimeters Printing Area Microline 590 8 inches Maximum Microline 591 13 6 inches Maximum Microline 590 591 Service Handbook 1 19 Specifications MEMORY SPECIFICATIONS EEPROM 1 Kbit serial EEPROM used to store Menu data ROM Older Configuration 1 Mbit Character Generator ROM located on main control board 05C 1 Mbit Printer Control EPROM located on main control board 05D New Configuration 4 Mbit located on main control board 05D RAM Receive Buffer Size is selected through the Menu Settings are 64 K 32 K 1 line Specifications 1 20 Microline 590 591 Service Handbook 19 CONSUMABLES 1 9 01 Ribbon CAUTION Using a non Okidata ribbon may damage the printhead and void any warranties Material Cartridge Fabric Types Black Ribbon Color Ribbon Magenta Yellow Cyan Black Life On average at 10 characters per inch Utility Mode Black Ribbon 4 million characters Color Ribbon Magenta 1 5 million characters Yellow 0 8 million characters Cyan 1 5 million characters 1 5 million characters Microline 590 591 Service Handbook 1 21 Specifications 1 10 OPTIONS 1 10 01 Cut Sheet Feeders The CSF 5000 is a narrow feeder for
106. g the unit Be sure to read all notes cautions and warnings as they contain important information regarding disassembly assembly Microline 590 591 Service Handbook 3 3 Maintenance 3 2 01 Preliminary Items Press the AC switch 1 and power off the printer Remove the paper if installed 2 Detach the AC power cord 3 Detach the interface cable if installed 4 P N 56609701 Cord AC RSPL P N 56624101 Cord AC 220V ML Series Right Angle Option RSPL P N 56624401 Cord AC 240V Option RSPL P N 70000803 Kit Parallel Interface Option Plug n Play Accessory P N 70012801 Kit RS232 C Serial Interface Option Maintenance 3 4 Microline 590 591 Service Handbook 3 2 01 pcx Microline 590 591 Service Handbook 3 5 Maintenance 3 2 02 Printhead Assembly Perform this procedure 3 2 01 Open the access cover 1 1 2 3 Lift and remove the ribbon Vot shown 4 Pull the head clamp 2 towards the right and then rotate it up to release the printhead 3 Pull the printhead straight up to remove it NOTE Installation After installing the printhead check the printhead gap adjustment Refer to Section 3 3 of this Service Handbook P N 52106001 Ribbon Black Consumable P N 52106002 Ribbon Color Consumable P N 50707401 Clamp Head RSPL P N 50217201 Assembly Printhead RSPL Maintenance 3 6 Microline 590 591 Service Handbook 3 2 02 pcx Microline 590 591 Service Handbook 3 7 M
107. ges are missing from any item in this kit please contact Okidata Technical Training Please FAX your request or use Okilink II Fax Number 609 235 2600 ext 7034 Okilink Login Name Technical Training You must provide the following information Okidata Authorization Number Dealer Number Part Number of document with missing pages Name of document with missing pages Page numbers of missing pages If it is the Service Handbook be sure to specify the section 1 1 2 3 4 a or b Y our facsimile number with area code Microline 590 591 Service Handbook 1 5 Course Administration COURSE PATH This Course Administration directs you through the training package Each section covers a different part of the training Tasks within each section direct you to the portions of the training materials that cover the subject you are studying When you have completed one section move on to the next You must achieve a score of 80 or greater on your Certification Test to successfully complete this course You must return your completed Certification Test Answer Sheet and Course Critique to Okidata within 30 days after the kit is received by your Dealership If multiple technicians are training at your Dealership only one technician must complete the testing during the 30 days DO NOT STAPLE THE ANSWER SHEET TO THE COURSE CRITIQUE Be sure to make a copy of the Answer Sheet for your records Your Answer Sheet will be corrected within tw
108. gs you have made using the front panel buttons To eliminate this problem enter the Menu Mode hold down the SHIFT button while pressing SEL MENU button and change the I Prime item in the Parallel I F Group to Invalid Microline 590 591 Service Handbook 4 13 Failure Analysis 4 5 ABNORMAL OUTPUT 4 5 01 Output Samples Light Print on innen Uneven Print the Entire Page Density Smeared Print An Inconsistent Line Feed Drifting Margin 4 5 01 pcx Failure Analysis 4 14 Microline 590 591 Service Handbook Light Print on the Entire Page Possible Causes 1 Ribbon is dried out Replace the ribbon 2 Verify that the headgap menu setting is appropriate for the type of paper being used 3 Check perform the printhead gap adjustment 4 Paper is not within specification Refer to Section One for paper specification Uneven Print Density Possible Causes 1 Printhead gap not within specification Perform the printhead gap adjustment 2 Defective platen Replace the platen Smeared Print Possible Causes Ribbon protector is missing or broken Replace the ribbon protector Verify that the headgap menu setting is appropriate for the type of paper being used 1 2 3 Check perform the printhead gap adjustment 4 Paper is not within specification Refer to Section One for paper specification Inconsistent Line Feed Possible Causes 1 Power OFF the printer Turn the platen knob The platen should
109. he Menu Mode Next press the GROUP button This will print the emulation selected If the emulation is not the one you want to use press the SET button to change it to the one you want before exiting the Menu Mode To exit press the SEL and SHIFT buttons If the emulation is correct check your software documentation on how to select a printer driver Then check to be sure that you have selected one of the drivers listed for that emulation Refer to the Printer Handbook for emulation driver selections The closer the driver is to the top of the list in the Printer Handbook the more compatible it will be with your printer If your software does not have any of the indicated drivers available check with the software manufacturer to see 1f they have added any additional drivers since you purchased your software If you have embedded any printer commands in your software check to be sure that you have entered them correctly Printing on the right side of the page is lighter or darker than the rest of the print on the page Although the printer automatically sets the head gap it sometimes may need a minor adjustment To make this adjustment enter the Menu Mode Press SEL and SHIFT buttons simultaneously To change the setting for the Printhead Gap Adjust under the Setup Group use the following procedure Press GROUP until Setup Group prints Press ITEM until Printhead Gap prints Press SEL to change the setting The default setting is
110. he automatic setting of the printhead gap The settings are 0 1 and 1 0 is the factory default Use 1 to darken print if output is consistently light Use 1 to lighten print if output is consistently dark 3 Gap Control This is a MENU ITEM in each Paper Feed Group The Groups are REAR FEED BOTTOM FEED and TOP FEED Gap Control determines how the printhead gap is set The settings are listed below Auto Gap Semi Auto Gap 1 2 3 4 5 6 7 8 9 An explanation of each setting follows Specifications 1 12 Microline 590 591 Service Handbook Auto Gap This is the factory default Automatically determines paper thickness of the first page During single sheet feed each page s thickness is checked while a job is printing Semi Auto Gap Similar to Auto Gap Automatically determines paper thickness of the first page During single sheet feed each page s thickness IS NOT checked while a job is printing 1 2 3 4 5 6 7 8 9 Used when the same paper is used ALL of the time Bypasses the automatic head gap adjustment 1 is the narrowest gap setting 9 is the widest gap setting sheets of n Tentative setting at PAR Hi interleaf Thickness paper paper mm gap range 9 Print instruction Number o sheets of Number of Max Preliminary printing muorm lt zn Is gap range at 6 or above Pressure sensitive paper Setting of gap is SP or more range at5 interleaf paper is 4P or m
111. hen Epson LQ emulation is selected Appears only when optional Serial Interface is installed Appears only when optional Cut Sheet Feeder is installed 3 78 Microline 590 591 Service Handbook Factory default settings are printed in Bold Italic The tables show all possible menu settings available with the Microline 590 591 What you will actually see depends on the active emulation and the options installed Group Item Setting Rear Feed Line Spacing 6 8 LPI Form Tear Off Off 500 ms 1 sec 2 sec Skip Over Perforation No Yes Page Width 13 6 8 Page Length 11 11 2 3 12 14 17 3 3 5 4 5 5 6 7 8 8 5 Gap Control Auto Gap Semi Auto Gap 1 2 3 4 5 6 7 8 9 Bottom Feed Line Spacing 6 8 LPI Form Tear Off Off 500 ms 1 sec 2 sec Skip Over Perforation No Yes Page Width 13 6 8 Page Length 11 11 2 3 12 14 17 3 3 5 4 5 5 6 7 8 8 5 Gap Control Auto Gap Semi Auto Gap 1 2 3 4 5 6 7 8 9 Top Feed Line Spacing 6 8 LPI Form Tear Off Off 500 ms 1 sec 2 sec Bottom Margin Valid Invalid Page Width 13 6 8 Page Length 11 11 2 3 12 14 17 3 3 5 4 5 5 6 7 8 8 5 Gap Control Auto Gap Semi Auto Gap 1 2 3 4 5 6 7 8 9 Wait Time 1 sec 2 sec 500 ms Page Length Control by M
112. his will retract the paper in micro increments This setting will be kept in memory until you power off the printer or until you change the setting To maintain this setting in the printer s memory even when the printer is powered off press and hold the SHIFT switch while pressing the QUIET TOF switch Press the SEL switch Reset the Top of Form to Factory Default 1 Power off the printer 2 Press and hold the QUIET and FF LOAD switches while you power on the printer NOTE The factory default Top of Form Setting is 1 inch Maintenance 3 82 Microline 590 591 Service Handbook 3 3 06 Paper Park General Information Paper Park allows the user to print using single cut sheet pages without removing continuous forms from the printer Procedure Continuous Feed to Single Sheet 1 Remove any printed pages from the printer Press PARK to retract the continuous forms paper from the paper path Lift the paper separator to the upright position 2 3 4 Move the paper lever to the TOP Single Sheet position 5 Load the single sheet paper Procedure Single Sheet to Continuous Feed Remove any single sheet pages from the printer Lower the paper separator to the Continuous Forms position rear feed Move the paper lever to the REAR or BOT position as appropriate Lower the paper support Press FORM FEED to load the continuous forms paper into the printer NOTE When the printer is set to
113. ill dirty the platen cause excessive wear on the ribbon and may damage the platen ribbon and printhead Procedure Follow these steps to print the Rolling ASCH Test Load the correct size continuous feed paper Power off the printer Press and hold the QUIET switch while powering on the printer You must hold the QUIET switch until the test starts to print The test will continue to print until you press the SEL switch or run out of paper Failure Analysis 4 44 Microline 590 591 Service Handbook ML594 EI A F W Bi1 22 R 986 3066 04 CG 41 02 s 1 FOME 70123456709 lt gt ABCDEFGHLIKLMNOPQRSTUVWKYZ 1 _ ebedefghijkimno 43 01234567891 lt gt 8 ABCDEFGBIIKLMANOPQRETUVWXYZ 1 _ abedefghi 3k1mnop 4005 1994 0123456799 1 lt gt ABCDEPGHITKLMNOPORSTUVWXYZ _ abcdefghi jkimnopy 885 70123456789 lt gt CABCDEFGHI IKLMNOPQRSTUVWXYZ _ abedetght Jklmnopar 16 1 0123456789 1 lt 9ABCDEFGHIJKLMNOPQRSTUVWXYZ 1 _ abedefghi3Jklimnopara k 44 0123456789 lt gt 0ABCDEFGAIJKLMNOPORSTUVWXYZ _ abcdefghi Jkimnopqret amp p 48123456 7991 lt gt BABCDEPGHIJKLMNOPORETUYWAYZ 5 _ abecdefghiikLmnoparetu t 40223056799 lt gt P SABCUSPGHI JKLMNOPORSTUVWKY2 j _ abedefghi Jkimmopgqrstuv 0123455789 1 lt ABCDEPGHTJRLMNOPORSTUVWKYZ _ abcdefghi Jjklanopgr a tuvw 10123456789 lt
114. ing Assigned Tasks LJ Read Section 3 4 of the Service Handbook Lubrication Assigned Tasks C Read Section 3 5 of the Service Handbook Shipping Instructions Assigned Tasks L Read Section 3 6 of the Service Handbook Course Administration 1 10 Microline 590 591 Service Handbook SERVICE AUTHORIZATION General Information Read through the instructions for completing the testing process before you begin This section contains the Answer Sheet Certification Test and Course Critique for this service training package These are the only copies of these items you will receive DO NOT WRITE ON THESE ITEMS PHOTOCOPY EACH ITEM Use the photocopies to complete the testing process Photocopy the Certification Test Answer Sheet and Course Critique as required for each technician being trained The information provided on the Answer Sheet and Course Critique is used to update your Dealership s Okidata Service Warranty Profile and to process your Certificate of Training The critique information is used to respond to your questions regarding this training package MAKE YOUR RESPONSES COMPLETE AND LEGIBLE Feel free to reference the training material as you answer the test questions Every attempt has been made to test your knowledge of the product and your ability to use the reference materials in this kit No attempt has been made to write trick questions If you have a question about a specific test question or answer p
115. ining Program is designed to build a knowledgeable and efficient service and support group for Okidata products One step in becoming an Authorized Okidata Service Center is obtaining a training kit for the appropriate product This acquisition allows the Dealership to have reference materials available during service jobs Having and using these reference materials will minimize the time and money spent on repairs Technicians complete Certification Tests as part of Okidata s Authorization process Testing familiarizes the technician with the product and reference materials This training course provides assembly level repair information to the field technician No attempt is made to provide basic training in being a technician This kit strives to train a technician to service the product Okidata views service technicians as representatives of Okidata Through this course Okidata seeks to provide the means and the motivation that will make good service a reality Remember Component level servicing is provided only at Okidata Service Repair Depots Microline 590 591 Service Handbook 1 1 Course Administration RECOMMENDATIONS Prerequisites Before beginning this course you should know the following concepts Have an understanding of basic electronics Be familiar with electrostatic principles Be familiar with dot matrix technology and protocol Be familiar with the proper procedures for handling circuit boards Read Only Memory
116. iodically replaced Itis purchased and installed by the end user Okidata machines are designed to work exclusively with Okidata consumables By using genuine Okidata consumable products the investment made in the equipment is protected Document A document is a printed item which supports the service and marketing of a product Various documents are available from Okidata Drivers Printer drivers are updated frequently Please refer to Okilink II for the latest printer driver information Firmware Firmware is revised frequently Please refer to Okilink II for the latest firmware information Option An option is a part assembly which is added to a product The option expands the products functionality An option may or may not be installed by the end user Instructions for installation accompany each option Option RSPL Okidata recommends that this part assembly be on hand for servicing installed options RSPL Okidata recommends that this part assembly be on hand for servicing Illustrated Parts Listing B 4 Microline 590 591 Service Handbook Technical Service Bulletins Technical Service Bulletins TSBs are also referred to as Okidata s monthly mail The TSBs contain the latest information on firmware revisions procedure changes and technical information updates Okidata distributes the TSBs through Okilink II The TSBs are issued monthly This part is specific to the Microline 590 printer This part is spe
117. ion 1 14 Microline 590 591 Service Handbook 4 Comments Microline 590 591 Service Handbook 1 15 Course Administration Certification Test Microline 590 591 1 After installing the space motor assembly Okidata recommends that you check the printhead gap adjustment A True False Refer to RAP 01 After turning on the AC power switch the next thing you should do is A replace the fuse check the AC cable to see if it is correctly connected replace the space motor assembly remove the printhead According to Appendix A in the Service Handbook the 40 vdc needed for the printhead space motor and line feed motor drive can be verified at CNS Pins 8 and 9 on the main control board CN3 Pins 1 and 2 on the main control board CNS Pins 1 and 2 on the main control board CN6 Pins 1 and 2 on the main control board Course Administration 1 16 Microline 590 591 Service Handbook Which of the following voltages is not supplied to the main control board 12 vdc 8 vdc 8 vdc 40 vdc Which of the following is true about the Color Ribbon Kit for the Microline 590 591 A It MUST be removed to use a black ribbon B It MUST be installed by an Okidata certified service technician It ONLY includes the color mechanism The ribbon MUST BE purchased separately It can be installed by the end user Microline 590 591 Service Handbook 1 17 Cours
118. is is a SERVICE ADJUSTMENT made by a technician It is covered in Section 3 3 of this Service Handbook The Adjustment measures 0 014 0 001 inches 0 35 0 03 mm 2 Printhead Gap Adjust This is a MENU ITEM in the SET UP Group It fine tunes the automatic setting of the printhead gap The settings are 0 1 and 1 0 is the factory default Use 1 to darken print if output is consistently light Use 1 to lighten print if output is consistently dark 3 Gap Control This is a MENU ITEM in each Paper Feed Group The Groups are REAR FEED BOTTOM FEED and TOP FEED Gap Control determines how the printhead gap is set The settings are listed below Auto Gap Semi Auto Gap 1 2 3 4 5 6 7 8 9 An explanation of each setting follows Principles of Operation 2 18 Microline 590 591 Service Handbook Auto Gap This is the factory default Automatically determines paper thickness of the first page During single sheet feed each page s thickness is checked while a job is printing Semi Auto Gap Similar to Auto Gap Automatically determines paper thickness of the first page During single sheet feed each page s thickness IS NOT checked while a job is printing 1 2 3 4 5 6 7 8 9 Used when the same paper is used ALL of the time Bypasses the automatic head gap adjustment 1 is the narrowest gap setting 9 is the widest gap setting sheets of n Tentative setting at PAR Hi interleaf Thickness
119. ity 2 Character Pitch The Operator Panel Function item is frequently set to Limited Operation on networks or other areas where many users share a printer Limited Operation prevents the printer settings from being changed This item cannot be changed through the OKISMART software However the print quality and character pitch may be set through your software application packages Maintenance 3 76 Microline 590 591 Service Handbook Procedure To return the printer to Full Operation you must modify the menu CAUTION Determine the preference of the end user regarding this feature If the printer is on a network do not reset this item without discussing the change with the network supervisor To access the menu when the printer is set to Limited Operation follow this procedure 1 Verify that continuous feed paper is installed 2 Verify that the ribbon is correctly installed 3 Verify that the width of the installed paper matches the paper width menu setting CAUTION If the Menu is set for wide paper and narrow paper is used the printhead will print on the platen This could damage destroy the printhead platen and ribbon Power off the printer 5 Press and hold the SEL switch while powering on the printer The MENU lamp will light If the printer was selected the SELECT lamp will light When in Menu Mode the functions printed below the operator panel switches are active Press GROUP until Set Up prints
120. k of Oki Electric Industry Company Inc PLUG n PRINT is a registered trademark of Oki America Inc marque deposee de Oki America Inc Bitstream is a registered trademark of Bitstream Incorporated Epson is a registered trademark of Seiko Epson Corporation IBM is a registered trademark of International Business Machine Corporation MS DOS is a registered trademark of Microsoft Corporation PC is a registered trademark of International Business Machine Corporation Proprinter is a registered trademark of International Business Machine Corporation Windows is a trademark of Microsoft Corporation Table of Contents COURSE ADMINISTRATION OVERVIEW RECOMMENDATIONS INFORMATION UPDATES NOTICES WHERE TO SEND TESTING MATERIALS MISSING ITEMS OR MISSING PAGES COURSE PATH SERVICE TRAINING SERVICE AUTHORIZATION General Information Answer Sheet Microline 590 591 Course Critique Microline 590 591 Certification Test Microline 590 591 SECTION ONE SPECIFICATIONS 1 1 OVERVIEW 1 1 01 General Information 1 2 PHYSICAL SPECIFICATIONS 1 2 01 Dimensions 1 2 02 Printer Weight POWER REQUIREMENTS 1 3 01 Input Power 1 3 02 Power Consumption 1 3 03 Power Frequency ENVIRONMENTAL CONDITIONS 1 4 01 Acoustic Rating 1 4 01 Altitude 1 4 03 Ambient Temperature and Relative Humidity RH AGENCY APPROVALS 1 5 01 Listings OPERATIONAL SPECIFICATIONS 1 6 01 Character Matrix Sizes Table of Print Speed and Character Matri
121. l Support Adjust the print head gap See Section 3 of the Service Handbook Has the problem been resolved Yes End of procedure No Power ON the unit and view the head gap indicator Does the head gap indicator display a range of 9 Yes GotoA No Replace the ribbon feed mechanism Has the problem been resolved Yes End of procedure No GotoC Failure Analysis 4 32 Microline 590 591 Service Handbook RAP 07 Ribbon Feed Problem START The ribbon feed does not function properly Verify that both ends of the carriage cable are connected correctly Make sure the ribbon shield is fastened properly Remove the ribbon cartridge Grasp the carriage Manually move the carriage left and right Does the ribbon drive shaft rotate Yes Change the ribbon cartridge End of procedure No Remove the ribbon feed mechanism Manually move the carriage left and right Does the space motor shaft rotate freely Yes Replace the ribbon feed mechanism End of procedure No Replace the space motor assembly Has the problem been resolved Yes End of procedure No Replace the main control board Has the problem been resolved Yes End of procedure No Contact Technical Support Microline 590 591 Service Handbook 4 33 Failure Analysis RAP 08 Line Feed Problem START No line feed operation Make sure that the line feed cable is properly connected to the line feed motor and CNS of the main control board Power OFF the printer
122. l board Has the problem been resolved Yes End of procedure No Go to B Failure Analysis 4 26 Microline 590 591 Service Handbook B Verify that 40 volts is present on CN7 main control board Refer to Appendix A of the Service Handbook Has the problem been resolved End of procedure Replace the carriage cable Has the problem been resolved Yes End of procedure No Replace the ribbon feed mechanism Has the problem been resolved Yes End of procedure No Replace the PROM O5CA Has the problem been resolved Yes End of procedure No Contact Technical Support Microline 590 591 Service Handbook 4 27 Failure Analysis RAP 03 Printhead Homing Error START Printhead does not return to the home position Make sure the carriage cable is properly connected to the space motor assembly and CN8 on the main control board Make sure the power connector cable is properly connected to CN3 on the main control board Does the space motor assembly move manually No Remove the space motor assembly and inspect the space motor and space rack for dirt and worn teeth Go to A Yes Are there any breaks in the carriage cable Yes Replace the carriage cable assembly Go to A No Verify that ribbon feed mechanism is properly fastened to the space motor assembly Go to A Failure Analysis 4 28 Microline 590 591 Service Handbook A Does the carriage move slightly to the left after turning the power on No Replace the s
123. lease bring it to the attention of Okidata Technical Training Refer to the Service Center Reference Guide for information on contacting Okidata Technical Training In order to improve the quality of future training courses Okidata welcomes your evaluation of this training program Please complete the course critique for this training course Before returning your completed testing materials photocopy your completed Answer Sheet for your records DO NOT ATTACH ANYTHING TO THE ANSWER SHEET Microline 590 591 Service Handbook 1 11 Course Administration Certification Test Requirements You must achieve a score of 80 or greater on your Certification Test to successfully complete this course You will need the following items Service Handbook User s Documentation 2 Lead Pencil Assigned Tasks Read through all instructions BEFORE completing the testing process Photocopy the Certification Test and Answer Sheet provided in this kit Use the photocopies to complete the testing process Complete the top section of the Answer Sheet Make your responses legible Answer the Certification Test Questions by filling in the appropriate block on the Answer Sheet Use a Number 2 pencil and completely fill in the selected block DO NOT ATTACH ANYTHING TO THE ANSWER SHEET L Make a copy of the completed Answer Sheet for your records Course Critique Requirements You will need the following items Your photocopy of the Course C
124. low these steps Goto the RAP Index Find the RAP which is associated with the printer s problem 1 2 3 Go to the appropriate RAP 4 All RAPs begin with a START statement followed by questions or another type of statement Failure Analysis 4 22 Microline 590 591 Service Handbook 4 7 02 RAP Index RAP Number Description 1 No Power Supplied to Printer No Spacing Operation Printhead Homing Error Paper Jam During Paper Loading Printhead Not Firing Pins Poor Print Quality Ribbon Feed Problem Line Feed Problem oo O1 UON Operator Panel Malfunction Parallel Interface Problem _ o Serial Interface Problem Microline 590 591 Service Handbook 4 23 Failure Analysis RAP 01 No Power Supplied to Printer START The printer does not power On when the AC switch is turned ON Check the AC cable Is 1t correctly connected Yes Check the fuse on the power supply board and F1 of the main control board Are they open No Goto A Yes Replace the fuse s with fuse s of the same rating Is the problem resolved Yes End of procedure No Goto A Remove the cable from CN3 on the main control board Refer to Appendix A of this Service Handbook for voltage check points on CN3 of the main control board Check the output voltages of the secondary of the transformer Replace the following in the order listed below Ch
125. mp Cord RSPL Both 3 2 08 56305901 540A2036M1502 Fuse GGS 5 120V RSPL Both 3 2 08 56306001 4YB4021 1146P1 Fuse 3 15 A for 230 240V Option RSPL Both 3 2 08 56302901 540A2036M1252 Fuse 2 5A 120V RSPL Both 3 2 08 This chip is soldered in on the Main Board AKGI Illustrated Parts Listing Microline 590 591 Service Handbook amp WR NN ah Y DIF AA Y lay gt E B 2 02 pcx Illustrated Parts Listing 15 B Microline 590 591 Service Handbook B 2 04 Printer Unit 1 of 3 Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Item Okidata P N Oki J P N Description Comments Refer to B 1 02 Disassembly Procedure 53563101 3PA4025 3720G1 Frame Main Narrow RSPL 590 3 2 30 53563201 3PA4025 3721G1 Frame Main Wide RSPL 591 3 2 30 50804601 3PP4025 3315P1 Lever Bottom Paper End RSPL Both 3 2 27 50804701 3PP4025 3322P1 Lever Bottom Sensor RSPL Both 3 2 27 50804801 3PP4025 3321P1 Lever Rear Sensor RSPL Both 3 2 18 50804902 4PP4025 3323P2 Lever Sensor Cut Sheet Continuous RSPL Both 3 2 18 56627201 3PB4025 3356P1 Cord Connection Line Feed RSPL Both 3 2 21 56510301 N A Motor Line Feed Assembly RSPL Both 3 2 21 51228401
126. n the change gear When the MPU requests a change in the head gap setting the GAP P signal causes the armature which is holding the change gear to be attracted to the pranger magnet The gap reset spring can now push the change gear so it contacts the gap change gear The rotation of the gap change gear causes idle gear D to turn the adjust gear The adjust gear turns the adjusting screw resulting in a new head gap setting NOTE As the adjusting screw turns counter clockwise the gap narrows As the adjusting screw turns clockwise the gap widens Narrows Printhead Adjusting gear Guide rail 2 28 tif Principles of Operation 2 26 Microline 590 591 Service Handbook There is a cam at each setting of the gap change gear When the change gear is at the top of the cam the change gear disengages from the gap change gear At this time the armature resets changing the head gap by one setting The head gap is modified in 06 mm units for each range setting Idle gear C Ribbon gear Pranger magnet Armature Ribbon drive gear Change gear Gap change gear Idiegear Adjust gear Gap Changer gear Armature Pranger magnet Change gear lt CO soot Dee Armature 2 27 tif Microline 590 591 Service Handbook 2 27 Principles of Operation 2 2 04 Ribbon Drive Mechanism Black Ribbon Drive Operation The ribbon drive mechanism feeds the ribbon in synchronization with the spacing operation The force req
127. nce 3 6 SHIPPING INSTRUCTIONS 3 6 01 Return for Service CAUTION When shipping the printer use the original packaging to prevent damage Be sure to secure the printhead so it will not move during shipment Locate the original packaging or order replacement packaging from Okidata Refer to Appendix B Make sure the printhead is secured so it will not move during shipment 3 Remove the platen knob Be sure to place it in the shipping container Pack the unit using the materials from Step 1 Maintenance 3 92 Microline 590 591 Service Handbook 3 6 02 All Other Returns CAUTION The product MUST be returned in the original packaging The product MUST be returned with ALL originally supplied factory items Be sure to secure the printhead so it will not move during shipment Locate the original packaging or order replacement packaging from Okidata Refer to Appendix B Locate the originally supplied factory items Refer to Setting Up in the Printer Handbook 3 Make sure the printhead is secured so it will not move during shipment Pack the unit using the materials from Step 1 Microline 590 591 Service Handbook 3 93 Maintenance This page was intentionally left blank Maintenance 3 94 Microline 590 591 Service Handbook SECTION FOUR FAILURE ANALYSIS 4 1 OVERVIEW 4 1 01 Introduction This section is used to isolate problems to the assembly level Application problems and detection of
128. nd ribbon Press and hold the SHIFT switch while pressing the SEL switch The MENU lamp will light If the printer was selected the SELECT lamp will light When in Menu Mode the functions printed below the operator panel switches are active Press GROUP until the desired Group prints Press ITEM until the desired Item prints Press SET until the desired Setting prints Press EXIT to save the change and exit Menu Mode Microline 590 591 Service Handbook 3 71 Maintenance Printing the Menu Printing the Menu provides a reference of current menu settings This will help you move through the menu Okidata STRONGLY RECOMMENDS printing the Menu before resetting the Menu to factory defaults Once the Menu is reset all customized settings are LOST To print the Menu follow this procedure 1 Verify that continuous feed paper is installed 2 Verify that the ribbon is correctly installed 3 Verify that the width of the installed paper matches the paper width menu setting CAUTION If the Menu is set for wide paper and narrow paper is used the printhead will print on the platen This could damage destroy the printhead platen and ribbon Press and hold the SHIFT switch while pressing the SEL switch 5 The MENU lamp will light If the printer was selected the SELECT lamp will light When in Menu Mode the functions printed below the operator panel switches are active 6 Press the PRINT switch 7 The Menu
129. ndbook 1 25 Specifications This page was intentionally left blank Specifications 1 26 Microline 590 591 Service Handbook SECTION TWO PRINCIPLES OF OPERATION 2 1 ELECTRICAL OPERATION 2 1 01 General Information The printers is made of the following electrical components Main Control Board Power Supply Assembly Operator Panel Space Motor Line Feed Motor Printhead 2 1 02 Main Control Board The main control board is made up of the microprocessor peripheral circuits drive circuits sensors and interface connectors The power to the main control board is supplied by the power supply assembly through a wire harness The power to other electrical parts such as the line feed motor space motor and printhead is supplied by the power supply assembly through the connectors on the main control board Microprocessor MPU Location 04D 67X640 16 bit MPU using CMOS technology The MPU contains a 20 bit address bus a 16 bit data bus The MPU can access 1 Mbyte of program memory space and 1 Mbyte of data memory space The microprocessor controls the entire printer by executing the control program through the LSI and the driver circuit Microline 590 591 Service Handbook 2 1 Principles of Operation Block Diagram NYYDVIG 33014 L6S 06S1N y1oAor yndur oy GAS 13534 asi NN best JOSUaS 3VdS 1495 dS ea Be YOSNIS MAN 3d vd Liguria e 12185 49pOIUq dz MS aseajay uondo 1NI 1010 AD NV UM
130. nent magnet The print wires which are attached to each armature are then concealed inside the wire guide When a signal to print a character is received current flows through a coil The magnetic field generated by the coil opposes the magnetic field between the armature and the permanent magnet The armature is then driven in the direction of the platen by the force of the armature spring The print wire which is attached to the armature protrudes from the tip of the wire guide strikes the paper through the ribbon and prints a dot on the paper As the armature gets closer to the electrode of the analog sensor the capacitance between them increases and a small amount of current flows This current is amplified and sent to the logic control LSI to indicate armature activity In order to attain optimum drive time this information is transferred to the MPU The MPU continually modifies the head gap to maintain the optimum drive time condition The analog sensor element monitors all of the pins The difference in pin stroke due to the curvature of the platen is compensated for at the logic control section of the printhead and is not transferred to the MPU After the character has been printed the permanent magnet attracts the armature and the print wires are retracted into the wire guide Two thermistors are used to monitor the printhead temperature A thermistor in the printhead prevents over heating of the coil during periods of continuou
131. nting Image Problems 4 4 05 Common Problems ABNORMAL OUTPUT 4 5 01 Output Samples Light Print on the Entire Page Uneven Print Density Smeared Print Inconsistent Line Feed Drifting Margin Left Margin Drifting Problem Vill FAULT ALARMS 4 6 01 General Information 4 6 02 ALARM LED Display Troubleshooting Table Index 4 6 03 ALARM LED Display Troubleshooting Tables REPAIR ANALYSIS PROCEDURES RAPs 4 7 01 Using the RAPs 4 7 02 RAP Index RAP Ol No Power Supplied to Printer RAP 02 No Spacing Operation RAP 03 Printhead Homing Error RAP 04 Paper Jam During Paper Loading RAP 05 Printhead Pins Not Firing RAP 06 Poor Print Quality RAP 07 Ribbon Feed Problem RAP 08 Line Feed Problem RAP 09 Operation Panel Malfunction RAP 10 Parallel Interface Problem RAP 11 Serial Interface Problem PRINTER TESTS 4 8 01 General Information 4 8 02 Rolling ASCII Test General Information Serial Interface Signal Requirements Commonly Used Serial Cable Configurations IBM 25 Pin Cable Configuration IBM 9 Pin Cable Configuration 4 8 05 Hexadecimal Dump Mode General Information Example Procedure RESISTANCE CHECKS 4 9 01 General Description Layout Diagram 4 9 02 Printhead Interconnect Diagram Control Board to Printhead 4 9 03 Line Feed Motor Resistance 4 9 04 Space Motor Resistance APPENDIX A BOARD DIAGRAMS A l OVERVIEW A 1 01 General Information A 2 INDEX TO CHARTS A 2 01 Main Controller Board AKGI A 2 02 Operator Panel Board
132. ntrol 2 1 06 Space and Line Feed SP LF Motor Control Line Feed Motor Control Space Motor Control Encoder Disk 2 1 07 Operation Panel 2 1 08 Alarm Circuit Driver Circuit Alarm Processing Low Motor Drive Voltage Alarm Head Drive Time Print Speed Head Overheat Alarm Processing 2 1 09 Power Supply Circuit Table of Output Voltages MECHANICAL OPERATION 2 2 01 Printhead Mechanism Printhead Gap Information Interconnect Diagram Control Board to Printhead Line Feed Motor Resistance Space Motor Resistance Printhead Operation 2 2 02 Spacing Mechanism Spacing Operation 2 2 03 Head Gap Mechanism Head Gap Setting Operation 2 2 04 Ribbon Drive Mechanism Black Ribbon Drive Operation Color Ribbon Shift Mechanism 2 2 05 Line Feed Mechanism Change Lever Paper Path Selection Lever Paper Clamp Mechanism Cut Sheet Continuous Sheet Switching Mechanism Top Feed for cut sheet paper Rear Bottom Feed for continuous feed paper Cut Sheet Paper Feed Operation Continuous Paper Feed Rear Tractor Mechanism Continuous Paper Feed Pull Tractor Mechanism Continuous Paper Feed Bottom Tractor Feed Mechanism Continuous Paper Feed Push Pull Tractor Mechanism 2 2 06 Paper Detection Mechanism Top Feed Paper Detection Rear Feed Detection Bottom Feed Detection 2 2 07 2 2 08 Support Protector Mechanism Automatic Paper Load Cut Sheet Paper Continuous Feed Paper 2 2 09 Paper Park Paper Park Operation SECT
133. o Contact Technical Support Microline 590 591 Service Handbook 4 39 Failure Analysis RAP 11 Serial Interface Problem START Are you using a cable with proper number of pins No _ Change the interface cable Has the problem been resolved Yes End of procedure No GotoA Yes Is the ALARM LED blinking Yes Refer to Section 4 6 of the Service Handbook Has the problem been resolved Yes End of procedure No Goto A No Check the following parameters for the RS232C baud rate bit length parity protocol busy signal and parity Has the problem been resolved Yes End of procedure No Goto A Failure Analysis 4 40 Microline 590 591 Service Handbook A Check the voltages on the main control board Is 10 VAC being supplied to the main control board Yes Replace the RS232C board Has the problem been resolved Yes End of procedure No Replace the main control board Has the problem been resolved Yes End of procedure No Contact Technical Support No Replace the power supply unit Has the problem been resolved Yes End of procedure No Replace the RS232C board Are 8 vdc 8 vdc present on the main control board Yes Replace the RS232C board Has the problem been resolved Yes End of procedure No Contact Technical Support No Replace the main control board Has the problem been resolved Yes End of procedure No Contact Technical Support Microline 590 591 Service Handbook 4 41 Failure Anal
134. o days after 1t is received by Okidata If you achieve a score of 80 or higher you will receive a Certificate of Training The Dealership you work for will become an Authorized Service Center for the products covered in this training package Service Authorization is approved once Okidata processes the Answer Sheet The Certificate of Training will be mailed to you after the Answer Sheet is corrected You and your Dealership are responsible for returning the Answer Sheet and Course Critique within 30 days after receiving the training kit Okidata strongly urges you to keep track of the date you return your Answer Sheet and Course Critique Certification and Authorization are processed within two days after Okidata receives the testing materials A certificate for successful completion of the training program will be sent to you within 21 days If authorization is not updated within two days or a certificate received within 21 days contact Okidata Dealer Service Proceed through each section and perform the assigned tasks Learn from the Course and Good Luck Course Administration 1 6 Microline 590 591 Service Handbook SERVICE TRAINING Requirements You will need the following items Service Center Reference Guide Service Handbook User s Documentation Service Videotape Video Cassette Player and Monitor Service Training is divided into the following six sections General Description Installation Principles of Operation Failure Anal
135. o the following to decode the serial number Example Printer Serial Number 401A0154693 Date Code 401 4 year 01 month Revision A Serial Number 0154693 Microline 590 591 Service Handbook 4 3 Failure Analysis 4 2 REPORTING PROBLEMS 4 2 01 General Information Okidata strives to provide accurate and detailed service information through its training materials The Technical Training Group realizes that service technicians have valuable experience knowledge and opinions Okidata strongly encourages you to report any problems you may encounter when using the materials of this training kit Please be as specific and detailed as possible Your comments suggestions and criticisms are used to update and revise training kits You should reference the training materials when servicing Okidata products Most problems can be solved by using the information provided in the training materials If you encounter a situation that cannot be solved please let Okidata know Refer to the Service Center Reference Guide for information on contacting Okidata 4 2 02 Problem Lists Technicians frequently request a list of common problems specific to a product Technical Training Kits are written before a product is shipped to customers Therefore such information is NOT available when a product is first released However Okidata wants to respond to these requests Okilink II provides round table discussions on technical problems Errors and corre
136. ore Envelope Appropriate gap setting gap levels 6 7 8and 9 Preliminary printing Appropriate gap setting gap levels 1 2 3 4and5 1 7 01 tif Microline 590 591 Service Handbook 1 13 Specifications 1 6 19 Print Modes Letter Quality Utility High Speed Draft 1 6 20 Print Speed Table of Print Speed and Character Matrix Mode LQ Utility High Speed Draft Speed 120 12 cpi 360 12 cpi 450 15 cpi Matrix H x V 29x 18 9x17 7x17 Specifications 1 14 Microline 590 591 Service Handbook 1 7 PAPER SPECIFICATIONS CAUTION Use Bottom Feed and or optional Pull Tractor for card stock and labels 1 7 01 Types Card Stock Weight Width Length Thickness Paper Feed Path Printhead Gap Information Continuous Form Weight Single Part Multi Part Carbonless Multi Part Interleaf Paper Carbon Width Length Thickness Paper Feed Path Printhead Gap Information 120 Ibs 450 g m Maximum Microline 590 5 to 8 inches 12 7 to 20 3 centimeters Microline 591 5 to 14 inches 12 7 to 35 6 centimeters 3 to 17 inches 7 62 to 43 18 centimeters 017 inches 0 44 millimeters Bottom Refer to the Printhead Gap Information Section 1 6 12 24 Ib 45 to 90 g m 9 11 Ib 35 to 40 g m 10 12 Ib 38 to 45 g m 9 Ib 35 g m Microline 590 3 5 to 10 5 inches 8 8 to 26 6 centimeters Microline 591 3 5 to 16 5 inches 8 8
137. orms Tear Off automatically advances the paper from the initial printing position to the tear off position The top of the page perforation will be even with the tear bar The tear bar is located under the clear top of the access cover Paper will remain in the tear off position until the printer receives data Then the paper is retracted to the initial print position When printing stops the paper will advance to the tear off position NOTE If the software package being used pauses while sending data to the printer Forms Tear Off may be activated if it is enabled through the Menu The pause must be for two or more seconds No data is lost Uneven print registration will occur due to the paper movement If the problem occurs deactivate Forms Tear Off through the Menu DO NOT use Forms Tear Off with labels or multi part forms Remember to activate the Form Tear Off for the paper path you are using rear feed or bottom feed Maintenance 3 86 Microline 590 591 Service Handbook Setting 1 Verify that continuous feed paper is installed 2 Verify that the ribbon is correctly installed 3 Verify that the width of the installed paper matches the paper width menu setting 4 5 Press and hold the SHIFT switch while pressing the SEL switch to place the printer Power ON the printer in Menu Mode When in Menu Mode the functions printed below the operator panels switches are active Press GROUP until the desired
138. otating it The Rear Sensor Lever rotates unblocking the Rear Top Paper End Sensor Rear Feed Detection When paper is fed from the rear push tractor Point B is pushed backward rotating Paper Near End Lever A As Paper Near End Lever A rotates it contacts the Rear Sensor Lever rotating it The Rear Sensor Lever rotates unblocking the Rear Top Paper End Sensor Bottom Feed Detection When the paper is fed from the bottom of the printer Point C is pushed rotating the Bottom Paper End Lever As the Bottom Paper End Lever rotates 1t contacts and rotates the Bottom Sensor Lever The Bottom Sensor Lever rotates unblocking the Bottom Paper End Sensor The method for detecting a paper end condition is in the reverse order that is paper end is detected when the Paper End Paper near end lever B Sensor is blocked Rear and Top paper end sensor Paper near end leverA Bottom paper end lever Bottom paper end sensor Bottom sensor lever t Point C 2 39 tif Principles of Operation 2 34 Microline 590 591 Service Handbook 2 2 07 Support Protector Mechanism During printer initialization the support protector is latched in the stored position approximately 5 mm from the left bracket of the main frame Just before paper is loaded the printhead moves towards the left bracket and unlatches the support protector As the printhead moves to the right the support protector reset spring pushes the support protector
139. p Ulu JO UOHINISU Peay UWUUUU UU yasay puosas asuodsay puewwo puoras puewwo gt 35413 asuodsa pueuwo 35413 puewwop na ejep G37 10 XHM IST jasa 197 404 VONNASU BILIAR Principles of Operation 2 13 Microline 590 591 Service Handbook 2 1 08 Alarm Circuit Driver Circuit Alarm Processing The printhead driver output the head gap magnet output and the color ribbon magnet drive signal are monitored at R670 and C15 and the POWER OFF P signal is output by the comparator Location 01A IC2901 when driven for more than the specified time This signal becomes the ALM signal The ALM signal is sent to the power supply board and causes the DC voltages to be turned off HDALM N POWER OFF P GAP MDV COR MDV Low Motor Drive Voltage Alarm 40V is converted into the POWLEV signal 0 vdc to 5 vdc by the voltage divider network of R533 and R537 then input to the A D port of the MPU The value of this voltage is used to control the drive time and the print speed pass number of the head 2 20 pcx POWLEV Principles of Operation 2 14 Microline 590 591 Service Handbook Head Drive Time The head drive time is modified to compensate for the amount of the voltage drop of the POWLEYV signal By monitoring the voltage drop every 500 microseconds the MPU is able to control and maintain the impact necessary for each printhead pin Print Speed Actual Voltage 40 vdc Passes Requi
140. pace motor assembly Has the problem been resolved Yes End of procedure No Contact Technical Support Yes Replace the ribbon feed assembly Has the problem been resolved Yes End of procedure No Replace the main control board Has the problem been resolved Yes End of procedure No Replace the space motor assembly Has the problem been resolved Yes End of procedure No Contact Technical Support Microline 590 591 Service Handbook 4 29 Failure Analysis RAP 04 Paper Jam During Paper Loading START Check paper path release lever for proper position Make sure the paper path is clear Which of the following paper jams have occurred 1 Paper bent at top left corner Check the support protector to see 1f 1t covers the left side of the paper properly Go to A Paper has torn ends Check the ribbon protector Check the pull up roller cover to see that it is closed properly Go to A Paper squeezed from either end Check around the pressure roller mechanism Check the front pressure springs to see that they are mounted properly There are three springs in the Microline 590 and five springs in the Microline 591 Check the tension of all the front pressure rollers to see if they are the same Top springs 250 g Rear Springs 90 g Make sure that the front release gear arm and the gear of the front release gear shaft are in the proper position Go to A A Has the problem been resolved Yes End of procedure No Che
141. ption RSPL 590 N A 51010101 1PP4053 2571P2 Guide Front Sheet W Cut Sheet Feeder Option RSPL 591 N A 56510501 3PB4053 2560P 1 Motor Pulse Cut Sheet Feeder Option RSPL Both N A 53562901 1PP4053 2576P 1 Supporter Front Sheet N Cut Sheet Feeder Option RSPL 590 N A 53480901 1PP4043 1891P4 Supporter Front Sheet W Cut Sheet Feeder Option RSPL 591 N A 50062801 4PB4053 1705G1 Roller Hopping L H Cut Sheet Feeder Option RSPL Both N A 50062802 4PB4053 1705G2 Roller Hopping R H Cut Sheet Feeder Option RSPL Both N A 53321501 3PB4025 1941P 1 Support Rear Sheet Cut Sheet Feeder Option RSPL Both N A 53448501 4PB4025 1914P1 Sheet Friction Cut Sheet Feeder Option RSPL Both N A 56306001 4YB4021 1146P1 Fuse 3 15 A for 230 240V Power Supply Option RSPL Both 3 2 08 55038901 4YA4021 1050G1 PCB LXHI RS232 C Option RSPL Both N A Illustrated Parts Listing B 26 Microline 590 591 Service Handbook No pictures were available at press time Microline 590 591 Service Handbook B 27 Illustrated Parts Listing B 2 10 Consumables Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Item Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 Procedure 1 52106001 Ribbon Black Cons
142. r Replace the interface board 19 ROM alarm Check sum error Replace the interface board 20 RAM on I F board alarm Read write error Replace the interface board then the main control board 21 Interface not connected Serial interface board not detected Replace the interface board replace the main control 22 Paper End Alarm From the cut sheet feed or bottom feed paper end Check paper supply Refer to RAP 04 23 Paper Change Lever Alarm Change lever is set for top feed while paper is inserted from rear or bottom Set the lever to the specified position check the rear sensor lever replace the main control board Cut Sheet Jam Cut sheet could not be fed properly Remove the paper check the feed mechanism Press SEL Printhead Thermal Alarm Printhead temperature exceeds 115 degrees Wait until the printhead cools The printer should resume printing Ifthe problem persists replace the printhead replace the main board Space Motor Thermal Alarm Temperature of space motor exceeds specified value Wait until the printhead cools The printer should resume printing Ifthe problem persists replace the space motor then replace the main control board Microline 590 591 Service Handbook 4 21 Failure Analysis 4 7 REPAIR ANALYSIS PROCEDURES RAPs 4 7 01 Using the RAPs When using the Repair Analysis Procedures fol
143. r Transmission of SP LF Motor Control Data or X ps X os X pa X os X pz X br X o 2 13 pcx Line Feed Motor Control The SP LF motor driver Location SA MHM2025 drives the line feed motor in two phase bipolar based on the phase changeover data output from the LSI The serial data from the LSI 02D MSM79V035 is processed by a register contained in the SP LF motor driver to measure the overdrive time and to change the phase acia ER EEE E 2 in WR TE JA AAA FORWARD REVERSE Principles of Operation 2 10 Microline 590 591 Service Handbook Space Motor Control The SP LF motor driver Location 5A MHM2025 drives the three phase brushless motor Motor movement is based on the phase signal SPU SPV and SPW and the speed instruction data from the LSI The MPU can identify the current speed of the space motor by measuring the pulse width of the output Phase A Phase B of the encoder disk sensor After comparing the target speed for each print mode with the actual speed the motor is accelerated or decelerated to maintain the desired speed for each print mode Encoder Disk As the space motor operates the encoder disk spins When the encoder disk interrupts the photo sensors the signals Phase A and Phase B are generated The LSI Location 02D MSM79V035 divides these edge pulse signals the frequency division is based on the selected print pitch to generate the signal IPT The IPT signal provides dot on
144. r Sensor Encoder Disk Carriage Frame Carriage Shaft Space Rack Spacing Operation The carriage frame which contains the printhead and space motor moves along the carriage shaft parallel to the platen When the space motor rotates the driving force is transmitted to the motor gear As the motor gear rotates the carriage moves along the platen For every revolution of the DC servo motor the carriage frame moves 0 8 inch 20 32 mm As the DC servo motor rotates a slotted disk called the encoder disk passes between a light source and two photosensors The position of the carriage frame can be determined by counting the pulses generated by the photosensors In the same way the rotation of the space motor can be recognized and controlled by measuring the phase relationship and the pulse width of the signals generated by the photosensors Principles of Operation 2 24 Microline 590 591 Service Handbook Print Head Carriage Shaft Slider Guide rail 2 26 tif Microline 590 591 Service Handbook 2 25 Principles of Operation 2 2 03 Head Gap Mechanism The head gap is automatically set for the thickness of the medium loaded in the printer In the case of envelopes where the medium thickness varies as the printhead moves along the platen the head gap changes to compensate for the differences in thickness Head Gap Setting Operation Once printing starts the space motor rotates the ribbon gear causing idle gear C to tur
145. red Relative Print Speed 34 vdc or greater 4 100 32 vdc to 34 vdc Approximately 85 Approximately 50 Less than 50 1 30 vdc to 32 vdc 1 30 vdc or less 2 Head Overheat Alarm Processing Two thermistors are used to monitor the printhead temperature One is contained in the printhead and the other in the printhead driver The voltage of the TSD signal is monitored at the MPU A D port to control the pass number and print method unidirectional bi directional at each of seven levels If the printhead temperature exceeds 110 degrees Celsius the printer will switch to unidirectional print If the temperature exceeds 115 degrees Celsius printing will stop Once the printhead cools printing will resume Z Be 93PASS Unidiectional Za frarassunidireci na O N er e2Pass Unidirectional fo 1 PASS Unidirectional print 1 e 1 PASS Bi directional print 2 22 pcx Microline 590 591 Service Handbook 2 15 Principles of Operation 2 1 09 Power Supply Circuit The switching type power supply circuit supplies the 5 vdc 8 vdc 12 vdc and 40 vdc ACIN SW ro NO gt Fuse I 1 1 1 I I t I 1 i 1 1 t l 1 i I i i i ALM i I i i 5V 38V and teang FIN ema Rectification and gt 5V switching circuit regulating circuit 12V l Rectification and i gt 8V smoothing circuit 8V Table of Output Voltages
146. rint Auto Select Smoothing Ribbon Selection Printhead tap Adjust Graphics speed I Prime Pin 16 Auto Feed XT mulation Mode Emulation Mode 3 73 Full Operation No Yes Na Valid Ne valid Black a Low suffer Print hv Invalid EPSON Q EPSON LU 3 3 06 tif Maintenance This page was intentionally left blank Maintenance 3 74 Microline 590 591 Service Handbook Reset Menu to Factory Defaults CAUTION Once the menu has been reset all customized menu settings will be lost Always print the menu before resetting the printer to factory defaults To reset the menu to factory default settings 1 Before resetting the Menu Okidata STRONGLY RECOMMENDS printing the Menu Printing the Menu provides a reference of customized settings When the Menu is reset all customized settings are LOST Power off the printer 3 Press and hold SEL and LF while powering ON the printer Microline 590 591 Service Handbook 3 75 Maintenance Limited Operation General Information One of the menu selections that may be set by the end user is the operator panel function This 1s found in the Set up Group of the menu Operator Panel Function is an item in the Set up Group This item may be set to either Full Operation or Limited Operation If the Operator Panel Function is set to Limited Operation the menu cannot be accessed and the operator panel switches listed below are not active 1 Print Qual
147. ritique Assigned Tasks C Complete the Course Critique C Return the Answer Sheet and Course Critique to Okidata Dealer Service DO NOT ATTACH ANYTHING TO THE ANSWER SHEET DATE ITEMS RETURNED TO OKIDATA Course Administration i 12 Microline 590 591 Service Handbook Answer Sheet Microline 590 591 Dealer Code Today s Date Technician s Name Company Company s Address Section 1 City State Province Zip Postal Code Country Phone Fax If your Dealership uses Okilink II please provide your Dealership s Login Name First Last Section 2 Microline 590 591 Service Handbook 1 13 Course Administration Course Critique Microline 590 591 Dealer Code Today s Date Technician s Name Company Companys Address City State Province Zip Postal Code Country Phone Have you completed other Okidata Self Study Service Training packages Yes No Please rate this course Excellent Below Average Above Average Poor Average Does your Dealership use Okilink II Yes No If yes please provide your Dealership s Login Name First Name Last Name Course Administrat
148. s bi directional printing If the printhead temperature exceeds 110 degrees Celsius the printer will switch to unidirectional print If the temperature exceeds 115 degrees Celsius printing will stop Once the printhead cools printing will resume When the temperature of the coil exceeds the pre determined limits the control circuit detects the thermistor signal TSD A thermistor in the printhead driver monitors the temperature of the driver If the temperature of the driver exceeds the pre determined limits 110 degrees Celsius unidirectional printing 115 degrees Celsius printing stops the control circuit detects the thermistor signal TSD The voltage of the TSD signal is monitored at the MPU A D port to control the pass number and print method unidirectional bi directional at each of seven levels Principles of Operation 2 22 Microline 590 591 Service Handbook Paper Print wire printhead Platen 1 When printing Paper Armature assembly Sensor Control P C B Thermistor Print wire 2 When not printing Microline 590 591 Service Handbook 2 23 Principles of Operation 2 2 02 Spacing Mechanism The spacing mechanism consists of a carriage shaft mounted parallel to the platen and a carriage frame which moves along the shaft The carriage frame is driven by a DC servo motor mounted on the carriage frame Items included in the spacing mechanism are listed below Space Motor Assembly DC Servo Motor Motor gea
149. s blinking check the items listed below Close the bail arm Check for a paper jam 1 2 3 Verify that the printhead moves freely 4 Record the status of the ALARM PRINT QUALITY and CHARACTER PITCH Lamps Refer to the Alarm Lamp Codes Table Section 4 6 6 Locate the error Perform the designated corrective action Operational Errors An Operational Error is usually not accompanied by an ALARM Lamp Refer to the Start Here Flowchart Section 4 4 03 and perform the corrective action ALARM Lamp Lights Paper End Jam Conditions A solid ALARM Lamp usually indicates a cover open paper jam or paper end out of paper condition Failure Analysis 4 8 Microline 590 591 Service Handbook 4 4 03 START HERE Flowchart START Power ON the unit Does the printer initialize No Is the ALARM Lamp Blinking No Refer to RAP 01 Yes Refer to Section 4 6 of the Service Handbook Yes Load the printer with paper Does the paper load without jamming No Refer to Rap 04 Yes Perform the Rolling ASCII test Refer to Section 3 of the Service Handbook Is the output satisfactory No Refer to RAP 06 Yes Are all operator panel switches operating properly No Refer to RAP 09 Yes Has the problem been resolved Yes End of procedure No Does the parallel or serial interface port receive data from the host PC properly Yes End of procedure No _ Which port is not receiving data Parallel Refer to RAP 10 Serial Ref
150. ted Parts Listing Format The format for this appendix is a series of tables with diagrams The tables contain the item reference number the Okidata and Oki Japan Oki J part numbers the part description a comments section and the disassembly procedure Okidata P N Description Comments Disassembly Oki J P N Refer to B 1 02 Procedure Items with the comments RSPL Recommended Spare Parts List Consumable Document or Option are available from Okidata Items without these comments are usually not stocked Some items are only available as assemblies Every effort has been made to clearly indicate which items are in assemblies and which are not N A will appear where a part number is not available Illustrated Parts Listing B 2 Microline 590 591 Service Handbook Current Part Numbers Okidata has made every effort to include current part numbers in this Service Handbook at the time of publishing However technical information frequently changes These changes often include new or modified parts with new or modified part numbers Please refer to the following resources for current part numbers and pricing e Okidata s Electronic Bulletin Board Okilink II contains current part numbers prices and recommended stocking levels for each item listed as a recommended spare part For instructions on accessing Okilink II refer to the Service Center Reference Guide Okidata s Faxable Facts is an a
151. the MPU and LSIs The program is executed and the LSIs are reset by the MPU via IORST N NOTE A Reset operation initiated by I PRIME does not reset the MPU The program sets the LSI 02D mode checks the memory ROM RAM then IF Motor Phase executes carriage homing and determines Initialization the phase of the line feed motor Finally the program establishes the a interface signals P I F ACK P signal VFACKSend UF BUSY OFF FACK sending and S I F BUSY N signal off Caen and lights the SELECT lamp to indicate that the printer is in the ON LINE state 2 07 tif Principles of Operation 2 6 Microline 590 591 Service Handbook 2 1 04 Parallel Interface Control The parallel data input from the host to the interface LSI is latched to the internal register by the falling edge of the STROBE N signal The LSI sets the BUSY N signal to inform the host that the data is being processed The LSI also outputs the RXD N signal to inform the MPU of data reception The data is read upon receiving the RD N signal from the MPU When the data processing is complete the BUSY N signal is disabled and the ACK N signal is sent to request the next data When the buffer is full and reception is not desired the BUSY signal is sent to request data transmission be stopped NSTB STROBE N NOTE Data 1t08 STROBE Falling u N Rising il 2 1 03 pcx 2 08 tif Microline 590 591 Service Handbook 2 7 Principles
152. through Faxable Facts Refer to the Service Center Reference Guide for information on accessing Faxable Facts 4 3 04 Technical Service Bulletins Okidata s Technical Service Bulletins TSBs contain technical information developed after product release Firmware updates part number changes and procedural changes are some of the subjects covered by these bulletins The TSBs are distributed through Okilink II Refer to the Service Center Reference Guide for information on accessing Okilink II Failure Analysis 4 6 Microline 590 591 Service Handbook TROUBLESHOOTING TIPS Preliminary Checks Is the product being operated under the proper ambient conditions Does the paper being used meet the specifications for this product Has the ribbon been replaced as recommended Has the ribbon been installed properly Is an Okidata ribbon being used Is the printhead gap correctly set Is the firmware the latest current revision Are the printer drivers being used correct for the printer 1 2 3 4 5 6 7 8 9 Is the printer driver being used the latest current release Microline 590 591 Service Handbook 4 7 Failure Analysis 4 4 02 Problem Categories There are three categories of problems that you might encounter when servicing the printer ALARM Lamp Blinks Fatal Errors The following can cause the ALARM lamp to blink Open Bail Arm Jammed Paper Printhead Cannot Move Other Fatal Error When the ALARM Lamp i
153. tion when reporting problems Okidata Dealer Number Technician s Name Company Name Company s Address Street City State Province ZIP Postal Code Country Telephone and Fax Numbers with area country access codes Product Name Unit s Serial Number Firmware Revision Level Description of Problem Document Name with page number or procedure with error or problem Microline 590 591 Service Handbook 4 5 Failure Analysis 4 3 TROUBLESHOOTING UPDATES 4 3 01 General Information Okidata distributes updated troubleshooting information in three ways Okilink I Faxable Facts Technical Service Bulletins 4 3 02 Okilink IT Okilink II is Okidata s Bulletin Board Service This service is available to all Okidata Certified Service Technicians Okilink II provides troubleshooting and service information Technicians can download files ask questions of Okidata s technical support personnel and participate in round table discussions about Okidata products and services Technical Service Bulletins Recommended Spare Parts Lists Printer Drivers Product Specifications and Service Training Information are also available Refer to the Service Center Reference Guide for information on accessing Okilink II 4 3 03 Faxable Facts Okidata s Faxable Facts is an automated fax document retrieval system It is maintained by Okidata s Customer Information Center Answers to common questions about Okidata products are available
154. to 41 9 centimeters 3 to 17 inches 7 62 to 43 18 centimeters 0 014 inches 0 36 millimeters Rear Feed 0 017 inches 0 44 millimeters Bottom Feed Rear or Bottom Refer to the Printhead Gap Information Section 1 6 Microline 590 591 Service Handbook 1 15 Specifications Cut Sheet Weight Width Width Length Thickness Paper Feed Path Printhead Gap Information Envelopes Weight Size Single Feed Minimum Maximum Continuous 12 to 24 Ibs 45 to 90 g m 7 2 to 14 3 inches 18 3 to 36 3 centimeters Microline 590 7 2to 8 5 inches 18 2 to 21 5 centimeters Microline 591 7 2 to 14 3 inches 18 2 to 36 3 centimeters 3 to 17 inches 7 62 to 43 18 centimeters 0 014 inches 0 325 millimeters Maximum Top Refer to the Printhead Gap Information Section 1 6 24 Ibs 90 g m Maximum 6 5 x 3 6 inches 16 5x 9 1 centimeters 9 5 x 4 1 inches 24 1 x 10 4 centimeters Non overlap type Thickness Paper Feed Path Printhead Gap Information Specifications 014 inches 325 millimeters Maximum Bottom Refer to the Printhead Gap Information Section 1 6 1 16 Microline 590 591 Service Handbook Labels Weight Width Length Thickness Paper Feed Path Printhead Gap Information CAUTION N A Microline 590 3 5 to 10 5 inches 8 8 to 26 6 centimeters Microline 591 3 5 to 16 5 inches 8 8 to 41 9 centimeters 3 to 17 inches 7 62 to 43 18 centimeters 011 in
155. uired to drive the ribbon is obtained from the space motor The ribbon drive mechanism is composed of the following items Ribbon drive gear assembly Ribbon gear located on the space motor assembly Ribbon cartridge A continuous loop ribbon with unidirectional feed is used Ink is supplied from an ink tank which is built into the ribbon cartridge When the space motor turns the ribbon gear on the spacing motor shaft rotates The rotation is transmitted via a combination of gears from the ribbon drive gear assembly to the drive gear in the ribbon cartridge Although the space motor moves in both the forward and reverse directions during bi directional printing the gears in the ribbon drive assembly maintain unidirectional ribbon feed by switching the rotation direction of the gears Principles of Operation 2 28 Ribbon cartridge Ribbon drive gt gear assembly 2 29 tif Microline 590 591 Service Handbook Color Ribbon Shift Mechanism Items of the color ribbon unit option are listed below Color shift unit Color ribbon 4 colors Four colors can be selected by sliding the color ribbon holder up or down Here is a description of how the ribbon holder is shifted As the space motor moves idle gear C on the ribbon drive unit rotates Idle gear C rotates the color idle gear located in the color shift unit Ribbon drive gear assembly When the color P signal from the main control board activat
156. umable 3 2 02 N A Both 2 52106002 Ribbon Color Consumable 3 2 02 N A Both Illustrated Parts Listing B 28 Microline 590 591 Service Handbook B 2 09 pcx Microline 590 591 Service Handbook B 29 Illustrated Parts Listing B 2 11 Packing Materials Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Item Okidata P N Oki J P N Description Comments Refer to B 1 02 Disassembly Procedure 53564901 N A Box Graphic RSPL 590 N A 53565001 N A Box Graphic RSPL 591 N A 53565401 N A Foam Molded Left RSPL Both N A 53565402 N A Foam Molded Right RSPL Both N A Illustrated Parts Listing B 30 Microline 590 591 Service Handbook No pictures were available at press time Microline 590 591 Service Handbook B 31 Illustrated Parts Listing B 2 12 Documentation Part numbers are subject to change Refer to Okilink II for current part numbers and pricing information Item Okidata P N Oki J P N Description Comments Refer to B 1 02 Disassembly Procedure 1 58229001 N A Kit ML590 591 Service Training Document Both N A 1 58229002 N A Kit ML590 591 Service Training Document Both N A 58229003 N A Kit ML590 591 Service Training Document Both N A
157. ure Analysis 4 46 Microline 590 591 Service Handbook MLS9 ZY A FW 41 22 YR4094 8465 48 CG B1 82 LQ Courier 18CPI 1 49 6 0123456789 lt gt BABCDEFGHIJKLMNOPORSTUVWKYZ _ abedefaqhijkimno paratuvwxyz 1 4S4k 01234567891 lt gt BABCDREFGHIIJKLMNOPQRSTUVWXYZ _ abedefghi jklmnopqretuvwazyzi 7 1 4 4 01234567891 lt gt PRABCDEFGHLIKLMNOPQ RSTUVWKY2 _ abcdefghijklmnopqratuvwxyz LQ Roman 19CP1 I e EE C 10123456789 lt gt BABCDEFGHI JELMNOPORSTUVPAYZ 11 _ abcdefghijtiano parstuvwryz 7 I ESE 01234567891 lt gt 78 ABCDEFGB 1 JRLMNOPORSTUVWEYZ _ abcdefahiJklamnoparstuvwxyz1 ESTE 94 101234567891 lt gt 8 ABCDEFGH JKLMNOPQ RSTUYWXYZ 11 _ abcdefghijkimnoparstuvwxyz1 3 LQ Swies 1 CPI 180 3 12123455789 lt gt 78 ABCDEFGH JKLMNOPORSTUVMRYZELI _ abodetgnh jkimne pqretuvwxyz F7 6 R 1 10123458789 lt gt 7 PABCOEFGH I JKLMNOPQRSTUVWXYZ 11 _ abodafghijkimnoparstuvwxyzil 1 408 8 M123456789 1 lt gt 7 ABCDEF GH JKLMNOPQ ASTUVWXYZOA1 _ abedetghi jk lmnopqrstuvwxyzit jp LQ Orator 18CPI Reta 81234557891 lt gt 78ABCDEFGHI JELANOPQRSTUVWXYZINI _ ABCDEFGHT JKL NND PARSTUVWKY7E I 1 HSER C1 4 8123456789 gt cm gt TEABCDEFGHI IKMLMNOPORSTUVHXYZINIT_ ABCDEFBHEISKLANOPGRSFUYMKY ZI IS 1 HORS CAH 181230557891 ce TBABCDEFGHLIKUNNDPD RSTUVMXYZENIT_ ABCDEFBHESKLM
158. utomated fax document retrieval system Part numbers and pricing are available through Faxable Facts For instructions on accessing Faxable Facts refer to the Service Center Reference Guide Okidata s Technical Information Group is a telephone support line reserved for Authorized Dealers Part numbers and pricing are available through Technical Information For instructions on accessing Technical Information refer to the Service Center Reference Guide REMEMBER Current part numbers recommended stocking levels and pricing information are available through Okilink II Faxable Facts and Technical Information Refer to the Service Center Reference Guide for information on accessing these resources Microline 590 591 Service Handbook B 3 Illustrated Parts Listing B 1 02 Definition of Terms Assemblies Assemblies are parts grouped under a single description and or part number Generally individual items in an assembly are not available from Okidata Assemblies are surrounded by broken line boxes in the diagrams Assemblies will say Includes xx xx under the Comments section of the tables Parts in assemblies will say Part of xx under the Comments section of the tables Blank Okidata does not recommend stocking this item This item should be purchased on an As Required Basis only The availability of this item is NOT guaranteed by Okidata Consumable A consumable is a supply item which has a specified life and must be per
159. will print 8 Press EXIT to exit Menu Mode For more information regarding the menu please refer to the Printer Handbook Maintenance 3 72 Microline 590 591 Service Handbook Sample Menu Printer Control Font Font Fon Font Font Symbol Sete Symbol Sets symbol Sats Symbol Sate Rear Feeo Rear Feed Rear Feed kear Feed Rear Feed Botton Feed Bottom Feed Rottom feed Bottom Feed Bottom Fead Too Feed Too Feed Teo Feed Top Feed Too Feed Set Up Set Up Set Up Set Up Emulation Made Print Mope Pitch Froportional Spacing Style Size Character Set Language Sat Zero Character Code Page Line Spacing Ferm Tear off Skip Over Pertoration Page Length Gap Control Lira Spazing Form Tear D0fT Skip Over Perforation Page Length Gap Control Lins Spactng Bottom Margin Page Length Gap Control Wait Fime graphics Receive Buffer Siza Paper Qut Override Print Registration PSON LQ LQ Courier 18 CPI No Normal Single fet I Smerican Slashed USA 6 LPS off No TIF Auto Gap 6 LPI off No 13 Auto Gap 6 LPI Valid 11 Auto Gap 1 GRC uni directionai BAK No AN 293 EAEE Set Up Set Lp Set Up Set up Set up Set Up Set Up Set Up Set lp Set Up Parallel I F Parallel I F Parallel I F Printer Contral Printer Contrul Microline 590 591 Service Handbook Operator Panel Function Reset Inhibit Print Suppress Effective Auto LF Time Ost P
160. x 1 6 02 Characters Per Line Microline 590 Microline 591 1 6 08 Graphics Resolution 1 6 09 Interface Optional 1 6 10 Line Feed Increments Variable 1 6 11 Line Feed Time 1 6 12 Menu Mode Optional 1 6 14 Paper Feed Paths 1 6 15 Paper Loading 1 6 16 Paper Out Detection 1 6 17 Paper Tear Capabilities 1 6 18 Print Method Printhead Type General Information Overheat Protection Printhead Gap Information 1 6 19 Print Modes 1 6 20 Print Speed Table of Print Speed and Character Matrix 11 PAPER SPECIFICATIONS 1 7 01 Types Card Stock 1 7 02 1 7 03 1 7 04 1 7 05 1 7 06 MEMORY SPECIFICATIONS 1 8 01 1 8 02 1 8 03 EEPROM ROM RAM CONSUMABLES 1 9 01 Ribbon OPTIONS 1 10 01 1 10 02 1 10 03 1 10 04 1 10 05 1 10 06 1 10 07 1 10 08 1 10 09 Cut Sheet Feeders Pull Tractor Kit Color Ribbon Kit Bottom Push Tractor Kit Serial Interface Roll Paper Stand Bitstream Face 20 1 23 OKISmart Typer Utility OKISmart Panel Utility RELIABILITY 1 11 01 1 11 02 1 11 03 1 11 04 1 11 05 1 11 06 1 11 07 Mean Time Before Failure MTBF Mean Time To Repair MTTR Printer Life Printhead Life Ribbon Life Warranty Limited Service SECTION TWO PRINCIPLES OF OPERATION 2 1 ELECTRICAL OPERATION 2 1 01 General Information 2 1 02 Main Control Board 2 1 03 2 1 04 Parallel Interface Control 2 1 05 Print Control LSVPrinthead Interface Gap Adjust Control Print Compensation Co
161. xtension A to free the spring from the claw 4 While pressing up slide the spring out in the direction of Arrow B and remove it P N 50923201 Spring Reset RSPL Both Maintenance 3 46 Microline 590 591 Service Handbook Microline 590 591 Service Handbook 3 47 Maintenance 3 2 23 Idle Gear and Change Lever 1 Perform these procedures 3 2 01 3 2 06 3 2 07 3 2 16 3 2 17 3 2 19 3 2 20 and 3 2 22 Remove the idle gear 1 The idle gear is a large narrow gear 3 Release the claw 2 of the change lever 3 The claw is accessed from inside the unit Remove the change lever NOTE Lubrication When lubricating refer to Section 3 5 of this Service Handbook P N 50805101 Lever Change P N 51228201 Gear Idle Maintenance 3 48 Microline 590 591 Service Handbook 3 2 23 pcx Microline 590 591 Service Handbook 3 49 Maintenance 3 2 24 Pressure Spring 1 Perform these procedures 3 2 01 3 2 06 3 2 07 3 2 16 3 2 17 3 2 19 3 2 20 3 2 22 and 3 2 23 Turn the front release gear arm 1 until it is disengaged Remove the release cam 2 This is the medium size thick cam Work the end of the pressure spring 3 free and remove the spring Remove the front release gear arm This arm is long with a serrated edge Remove the switch lever 4 This is the small lever NOTE Installation Install the release cam first Then install one end of the pressure spring into the release
162. ysis This page was intentionally left blank Failure Analysis 4 42 Microline 590 591 Service Handbook 4 8 PRINTER TESTS 4 8 01 General Information This section covers the tests listed below Rolling ASCH Test Font Test Serial Interface Loopback Test Hexadecimal Dump Mode The Rolling ASCH and Font Tests check print operations The Serial Interface Loopback Test checks the operation of the serial interface board The Hexadecimal Dump Mode checks the data transfer between the computer and printer Microline 590 591 Service Handbook 4 43 Failure Analysis 4 8 02 Rolling ASCH Test General Information The rolling ASCII test is a continuous printout of all 96 ASCII characters Use this test to check the following items 1 Print Quality Across the entire length of a line Down the entire page 2 Line Spacing 3 Left Margin Alignment At the top of the test is the printer type 1 emulation 2 country 3 and firmware revision level 4 This information is often required while performing service or when contacting Okidata Have this test available during your service call CAUTION Before running this test make sure that continuous feed paper is loaded If you are running this test on a Microline 591 use wide paper or have the page width set for 8 5 x 11 in the printer menu Running the test without paper loaded or having the wrong width paper loaded will allow the printhead to print on the platen This w
163. ysis Appendices Maintenance Disassembly Assembly Adjustments and Service Checks Cleaning Lubrication Shipping Instructions Microline 590 591 Service Handbook 1 7 Course Administration General Description This section describes the features and specifications of the printers Assigned Tasks C Read Section 1 of the Service Handbook C Read Appendix A in the Printer Handbook Installation In this section you will install the unit You will also perform various tests Assigned Tasks L Review the Printer Handbook L Read the Introduction Chapters 1 2 3 4 and 5 and Appendices B C D E and F in the Printer Handbook C If a product is available perform the tests listed below Refer to Section 4 of the Service Handbook Rolling ASCH Font Test Principles of Operation This section describes the function of the major assemblies from an electrical and mechanical perspective Assigned Tasks L Read Section 2 of the Service Handbook Course Administration 1 8 Microline 590 591 Service Handbook Failure Analysis This section covers the methods used to identify and correct problems with the unit Assigned Tasks C Read Section 4 of the Service Handbook C Read Chapter 6 of the Printer Handbook C Study the Board Diagrams in Appendix A of the Service Handbook L Check Okilink II for additional troubleshooting information Refer to the Service Center Reference Guide for information on accessing

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