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Service Guide ML520/521

Chapter 2 Principles of Operation

Line Feed Motor Resistance

The resistance of each coil should be approximately 13 ohms.

Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

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Summary of Contents for ML520

Page 1: ...09 17 97 Note This Adobe Acrobat version of the Okidata Service Training Manual was built with the pictures rendered at 300 dpi which is ideal for printing but does not view on most displays well Cop...

Page 2: ...14 1 10 05 Serial Interface 15 1 10 06 Roll Paper Stand 16 1 10 08 OKISmart Typer Utility 17 1 11 Reliability 18 2 Principles of Operation 2 1 Electrical Operation 19 2 1 01 Main Control Board 20 Blo...

Page 3: ...r Mechanism 57 Continuous Paper Feed Pull Tractor Mechanism 58 Continuous Paper Feed Bottom Tractor Feed Mechanism 59 Continuous Paper Feed Push Pull Tractor Mechanism 60 2 2 06 Paper Detection Mechan...

Page 4: ...2 28 Front Pressure Roller Assembly 97 3 2 29 Tractor Assembly 98 3 2 30 Main Frame 99 3 3 Printer Adjustments 100 3 3 02 Printhead Gap Adjustment 101 3 3 03 Key Combinations 102 3 3 04 Menu Operatio...

Page 5: ...alfunction 140 RAP 10 Parallel Interface Problem 141 RAP 11 Serial Interface Problem 142 4 8 Printer Tests 143 4 8 02 Rolling ASCII Test 144 4 8 03 Font Test 145 4 8 04 Serial Interface Loopback Test...

Page 6: ...B 2 01 Printer 171 B 2 02 Upper Cover Assembly 172 B 2 03 Printer General Assembly 173 B 2 04 Printer Unit 174 B 2 05 Printer Unit 175 B 2 06 Printer Unit 176 B 2 07 Carriage Assembly 177 B 2 08 Opti...

Page 7: ...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...

Page 8: ...al Business Machine Corporation Windows is a trademark of Microsoft Corporation Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for...

Page 9: ...Microline 521 is a 132 column printer Okidata s one year limited warranty covers the parts labor and printhead on both printers The following items are available for the printer OKISMART Typer softwa...

Page 10: ...hes 37 8 centimeters Height 6 5 inches 16 5 centimeters Microline 521 Width 23 inches 58 4 centimeters Depth 14 9 inches 37 8 centimeters Height 6 5 inches 16 5 centimeters 1 2 02 Printer Weight Micro...

Page 11: ...230 240 VAC 10 14 1 3 02 Power Consumption Operating 110 VA Idle 40 VA Local Test 70 VA 1 3 03 Power Frequency 120 VAC 60 Hz 2 230 240 VAC 50 60 Hz 2 Copyright 1997 Okidata Division of OKI America Inc...

Page 12: ...roline 521 52 3 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 degrees Fahrenheit 5 to 40 degrees Celsius Operating humidity...

Page 13: ...d No 1950 D3 CSA No CSA Standard 22 2 950 D3 FCC FCC Certified per Part 15 Subject J Class B IEC IEC 950 VDE VDE 0805 VDE 0875 Class B BS BS 7002 Copyright 1997 Okidata Division of OKI America Inc All...

Page 14: ...ix H x V 17 x 13 9 x 7 7 x 7 Print Speed at Different CPI for the ML 520 521 Mode CPI CPS Horiz DPI Vert DPI IPS HSD 10 427 90 72 42 7 12 427 108 72 35 6 15 427 135 72 28 5 17 1 427 154 72 25 0 20 427...

Page 15: ...17 1 272 20 1 6 03 Character Pitches 5 6 8 5 10 12 15 17 1 20 1 6 04 Character Sets Standard ASCII EPSON Character Set I II IBM Character Set I II All Characters Foreign Character Substitution Interna...

Page 16: ...UPC A UPC E EAN 8 EAN 13 Interleaved 2 of 5 Code 128 A B C Postnet 1 6 07 Front Panel Switches SELECT Menu Micro Feed Up Down Shift Paper Park Line Feed Pitch Selection FORM FEED Load Print Quality Se...

Page 17: ...eed rate 1 6 12 Menu Mode Switch Action Paper park Prints the entire menu Line Feed Reverse Selects Group Function FORM FEED Load Selects Item Tear Selects Item Value SEL Menu Exits Menu Mode Enters S...

Page 18: ...l bottom feed tractor unit 1 6 18 Print Method Printhead Type General Information Impact Dot Matrix 9 pin printhead 0134 inch 0 34 millimeter diameter pins Overheat Protection When printhead temperatu...

Page 19: ...3 Gap Control This is a MENU ITEM in each Paper Feed Group The Groups are REAR FEED BOTTOM FEED and TOP FEED Gap Controls determines how the printhead gap is set The settings are listed below Auto Gap...

Page 20: ...uality Utility High Speed Draft 1 6 20 Print Speed Table of Print Speed and Character Matrix Mode Near Letter Quality Utility High Speed Draft Speed 80 12 cpi 320 12 cpi 427 12 cpi Matrix H x V 17 x 1...

Page 21: ...Gap Information Refer to the Printhead Gap Information Section 1 6 Continuous Form Weight Single Part 12 24 lb 45 to 90 g m 2 Multi Part Carbonless 9 11 lb 35 to 40 g m 2 Multi Part Interleaf Paper 1...

Page 22: ...imeters Maximum 9 5 x 4 1 inches 24 1 x 10 4 centimeters Continuous Non overlap type Thickness 014 inches 325 millimeters Maximum Paper Feed Path Bottom Printhead Gap Information Refer to the Printhea...

Page 23: ...n Refer to the Printhead Gap Information Section 1 6 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...

Page 24: ...inches 8 8 centimeters Maximum 10 5 inches 26 6 centimeters Microline 521 Minimum 3 5 inches 8 8 centimeters Maximum 16 5 inches 41 9 centimeters Printing Area Microline 520 8 inches Maximum Microlin...

Page 25: ...rinter Control Program Fonts 1 8 03 RAM 128 Kbyte Total Resident RAM Used as Receive Buffer Receive Buffer Size is selected through the Menu Settings are 64 K 32 K 1 line Print Buffer DLL Buffer Scrat...

Page 26: ...printhead and void any warranties Material Nylon fabric cartridge type re inking Type Black Ribbon Life On average at 10 characters per inch Utility Mode 4 million characters Copyright 1997 Okidata Di...

Page 27: ...ingle 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 lb 100 sheets 20 lb Dual Bin P N 70022601 is a narrow fe...

Page 28: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 29: ...or the Microline 520 The Pull Tractor Kit P N 70023201 is a wide feeder for the Microline 521 Bottom Feed Rear Feed For Push Pull Operation Paper Types Continuous Feed and Labels Copyright 1997 Okidat...

Page 30: ...feeder for the Microline 520 The Bottom Push Tractor Kit P N 70023101 is a wide feeder for the Microline 521 Bottom Feed Paper Type Continuous Feed Includes Stand and Metal Tear Bar Copyright 1997 Ok...

Page 31: ...uper Speed 19 2K RS 232C Ready Busy X On X Off Protocols Can be configured through the Menu or OKISmart Utility Program Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the O...

Page 32: ...pts printer for use with roll type paper Model 520 only Includes Stand Support Cord and DIN plug for connection to printer Copyright 1997 Okidata Division of OKI America Inc All rights reserved See th...

Page 33: ...ned via BRC Business Reply Card packaged with printer Includes Front Panel Control Utility and Drivers for Windows 3 0 3 1 NOTE The OKISmart software includes three programs 1 OKISmart Control 2 OKISm...

Page 34: ...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 Approximate...

Page 35: ...lectrical components listed below Main Control Board Power Supply Assembly Transformer Filter Board Operator Panel Space Motor Line Feed Motor Printhead Copyright 1997 Okidata Division of OKI America...

Page 36: ...ead is provided by the power supply circuitry through connectors on the main control board Microprocessor MPU Location 04C 67X640 16 bit MPU using CMOS technology The MPU contains a 20 bit address bus...

Page 37: ...20 521 Chapter 2 Principles of Operation Block Diagram Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this mate...

Page 38: ...e printer The MPU executes the instructions contained in this program The Program ROM is assigned to the program memory area of the MPU and instructions are fetched by the PSEN signal of the MPU Copyr...

Page 39: ...RAM is CMOS dynamic RAM with 65 536 words x 16 bit configuration It is used as a receive buffer print buffer and work buffer Copyright 1997 Okidata Division of OKI America Inc All rights reserved See...

Page 40: ...r drive phase Transmits and receives serial data to and from the printhead based on the dot timing which is derived from the space motor speed Controls the external interface The LSI is connected to t...

Page 41: ...PROM is a CMOS serial I O type memory EEPROM It is capable of electrically erasing and writing 1 024 bits The EEPROM contains the menu data and the head drive time correction data Copyright 1997 Okida...

Page 42: ...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 executes carriage homing and determine...

Page 43: ...o 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 A...

Page 44: ...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 In the case of envelopes where the medi...

Page 45: ...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 c...

Page 46: ...nalog circuit The Gap Adjust LSI then sets the optimum printhead gap for the printing medium NOTE Refer to Section 2 2 03 for a description of the mechanical process All values in the below chart are...

Page 47: ...l The printhead compensates for the shape of the platen as shown below NOTE Also refer to Section 2 1 07 Head Drive Time Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the...

Page 48: ...79V035 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 Copyright 1997 Okidata Division of...

Page 49: ...sed on the phase changeover data output from the LSI The serial data from the LSI 04B MSM79V035 is processed by a register contained in the SP LF motor driver to measure the overdrive time and to chan...

Page 50: ...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 th...

Page 51: ...are generated The LSI Location 04B 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 timi...

Page 52: ...tion panel control LSI Location IC1 BUS148S 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 On...

Page 53: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 54: ...C8 The POWER OFF P signal is output by the comparator Location 02C IC2901 when driven for more than the specified time This signal becomes the ALM signal The ALM signal is sent to the power supply boa...

Page 55: ...e voltage divider network of R542 and R544 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 Copyright 1997...

Page 56: ...the voltage drop of the POWLEV signal By monitoring the voltage drop every 500 microseconds the MPU is able to control and maintain the impact necessary for each printhead pin Copyright 1997 Okidata D...

Page 57: ...elative Print Speed 34 vdc or greater 1 100 32 vdc to 34 vdc 1 Approximately 85 30 vdc to 32 vdc 1 Approximately 50 30 vdc or less 2 Less than 50 Copyright 1997 Okidata Division of OKI America Inc All...

Page 58: ...the coil during periods of continuous bi directional printing If the temperature of the coil exceeds the pre determined limits the control circuit detects the thermistor signal TSD Another thermistor...

Page 59: ...se 5 vdc IC logic levels LED drive voltages 8 vdc Serial interface line voltage comparator IC 10 VAC Serial interface line voltage and the printhead analog circuit 40 vdc Printhead space motor and lin...

Page 60: ...e main control board via the carriage cable and the space motor The printhead is composed of the following parts Wire Guide Spring Assembly Wire Armature Spring Yoke Spacer Magnet Assembly Magnet Core...

Page 61: ...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...

Page 62: ...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 Copyright 19...

Page 63: ...head NOTE The printhead coil resistance values ARE NOT LISTED The individual printwire control lines CANNOT be accessed on this printhead Copyright 1997 Okidata Division of OKI America Inc All rights...

Page 64: ...ion Line Feed Motor Resistance The resistance of each coil should be approximately 13 ohms Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Excha...

Page 65: ...ration Space Motor Resistance The resistance of each coil should be approximately 5 ohms Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchang...

Page 66: ...guide and strikes the paper through the ribbon This 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 amoun...

Page 67: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 68: ...coil during periods of continuous bi directional printing If the temperature of the coil exceeds the pre determined limits the control circuit detects the thermistor signal TSD Another thermistor moni...

Page 69: ...aft 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 Gear Sensor Encode...

Page 70: ...s 0 8 inch 20 32 mm As the DC servo motor rotates a slotted disk called the encoder disk rotates with the servo motor and passes through the photosensor The position of the carriage frame can be deter...

Page 71: ...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 rotati...

Page 72: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 73: ...sembly Ribbon Cartridge A continuous loop ribbon with uni directional 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...

Page 74: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 75: ...Idler Gear Platen Rear Tractor Feed Unit 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 Clamp Me...

Page 76: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 77: ...ally feeds the sheet to the print start position 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...

Page 78: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 79: ...ine feed idler gear platen gear to the platen When using cut sheet paper the change lever must be in the TOP position so the platen and pressure rollers can feed the paper This also disengages the pus...

Page 80: ...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 feed the continuous paper Copyright 1997 Okidata Division...

Page 81: ...installed As the platen rotates power is transferred to the drive gear from the line feed idler gear the platen gear idler gear B and idler gear A The drive gear turns the pull tractor assembly which...

Page 82: ...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 which feeds the continuous paper Copyright...

Page 83: ...mechanism consists of an optional pull tractor and a standard push tractor mechanism Continuous paper is fed by these two tractors at the same time Copyright 1997 Okidata Division of OKI America Inc...

Page 84: ...Point B is pushed backward This makes the Sensor Lever rotate As the Sensor Lever rotates it contacts the Rear Sensor Lever This makes the Rear Sensor Lever rotate The Rear Sensor Lever rotates unbloc...

Page 85: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 86: ...protector reset spring pushes the support protector toward the center of the platen With the support protector in this position the ribbon protector and the support protector prevent the leading edge...

Page 87: ...er 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 sens...

Page 88: ...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 wil...

Page 89: ...anel A reverse line feed operation retracts the paper until paper end occurs or 19 inches of paper have been retracted NOTE Retracting 19 inches of paper without detecting a paper end condition causes...

Page 90: ...rocedures 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...

Page 91: ...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...

Page 92: ...y attached to the original positions 8 When handling circuit boards use extreme care Integrated circuits microprocessors ROM and RAM can be destroyed by static electricity 9 Do not place printed circu...

Page 93: ...croline 520 521 indicates that the item is specific to the Microline 521 Both indicates that the item is common to both printers This Service Handbook lists the disassembly procedures for major compon...

Page 94: ...rface cable if installed 4 P N 56609701 Cord AC RSPL Both B 2 03 P N 56624101 Cord AC 220V ML Series Right Angle Option RSPL Both B 2 03 P N 56624401 Cord AC 240V Option RSPL Both B 2 08 P N 70000803...

Page 95: ...Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 96: ...he head clamp 2 towards the right and then rotate it up to release the printhead 3 5 Pull the printhead straight up to remove it NOTE Installation After installing the printhead check the printhead ga...

Page 97: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 98: ...l break 1 Perform these procedures 3 2 01 and 3 2 02 2 Open the pull up roller cover 1 3 Use a straight slot screwdriver to release the extensions 2 from the carriage frame set 3 4 Lift the ribbon pro...

Page 99: ...e four claws 1 of the gear case assembly 2 3 Lift and remove the gear case assembly NOTE Lubrication When lubricating refer to Section 3 5 of this Service Handbook P N 51228501 Gear Case Assembly RSPL...

Page 100: ...he assembly towards the back of the printer 5 Remove the assembly NOTE Lubrication When lubricating refer to Section 3 5 of this Service Handbook P N 53341501 Roller Pull Up Assembly Narrow RSPL 520 B...

Page 101: ...ess 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 guid...

Page 102: ...B 2 02 P N 53067101 Cover Access Narrow RSPL 520 B 2 02 P N 53067201 Cover Access Wide RSPL 521 B 2 02 P N 53067301 Cover B for card slot RSPL Both B 2 03 P N 53562601 Knob Platen ML500 Series RSPL Bo...

Page 103: ...d CN5 line feed motor 7 6 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...

Page 104: ...Both B 2 03 P N 55938301 IC EEPROM BR93CC46A RSPL Both B 2 03 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to t...

Page 105: ...ard 6 6 Use a straight slot screwdriver to free the transformer from the holding clamp A position the screwdriver in the direction of the arrow 7 twist the screwdriver while pushing the transformer 8...

Page 106: ...h B 2 03 P N 50707501 Clamp Cord RSPL Both B 2 03 P N 56306201 Fuse 1A 250V Filter Brd 220V Option RSPL Both B 2 03 P N 56306101 Fuse 2 5A 125V Filter Board RSPL Both B 2 03 Copyright 1997 Okidata Div...

Page 107: ...des of the frame 4 Lift the operator panel assembly 2 straight up and remove it 5 Open eight claws 3 and remove the operator panel board 4 from the operator panel 5 P N 53562703 Panel Operator RSPL Bo...

Page 108: ...3 2 01 3 2 02 and 3 2 04 2 Remove the two screws 1 and the connector holders The holders are not shown 3 Remove the PC connector 2 NOTE Installation Do not touch the contacts of the PC connector Do n...

Page 109: ...601 Connector PC HD40 RSPL Both B 2 07 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx ok...

Page 110: ...he space motor assembly 7 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 ass...

Page 111: ...Guide Roller Assembly Both B 2 07 P N 53341901 Roller Guide RSPL Both B 2 07 P N 53342001 Holder Guide Roller RSPL Both B 2 07 P N N A Pin Both B 2 07 P N N A Guide Roller Spring Both B 2 07 Copyright...

Page 112: ...ts 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 NOT sharply bend the carriage cable You will slig...

Page 113: ...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...

Page 114: ...53563301 Rack Space Narrow RSPL 520 B 2 04 P N 53563401 Rack Space Wide RSPL 521 B 2 04 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchang...

Page 115: ...ckup 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 Both B 2 07 P N 53341701 Roller...

Page 116: ...w 2 location only in the base frame down to release the guide rail 3 Do not press too hard or the claw will break 5 Use a straight slot screwdriver to slide the guide rail in direction of arrow A 6 Li...

Page 117: ...1009901 Guide Rail Wide RSPL 521 B 2 04 P N 53067701 Cam Adjust RSPL Both B 2 04 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX fo...

Page 118: ...2 07 2 Cut the 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 Both B 2 04 Copyright 1997 Okidata Division of...

Page 119: ...om the claws of the base frame You may have to use a screwdriver to work the plate tabs free 3 Lift the plate and remove it NOTE Installation The plate must be securely seated under the claws P N 5101...

Page 120: ...is at the top then work the lever free 3 Remove the lever 4 Turn the rear feed paper sensor lever 2 until the flag is at the top then work the lever free 5 Remove the lever P N 50804902 Lever Sensor R...

Page 121: ...2 in then rotate them towards the front to unlock them from the frame 4 The levers should be vertical 5 Lift the platen assembly 3 straight up and remove it NOTE Installation After installing the pla...

Page 122: ...RSPL 520 B 2 05 P N 50098302 Platen Assembly Wide RSPL 521 B 2 05 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates t...

Page 123: ...claws of the lock spring 2 and remove the spring 4 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 Pressur...

Page 124: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 125: ...own on the line feed motor assembly 1 while tilting the assembly out 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...

Page 126: ...Cord Connection Line Feed RSPL Both B 2 04 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bp...

Page 127: ...ht 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 3 Reach from under...

Page 128: ...edures 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 2 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 in...

Page 129: ...SPL Both B 2 05 P N 51228201 Gear Idle RSPL Both B 2 05 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this mat...

Page 130: ...spring 3 free and remove the spring 5 Remove the front release gear arm This arm is long with a serrated edge 6 Remove the switch lever 4 This is the small lever NOTE Installation Install the release...

Page 131: ...Pressure Narrow RSPL 520 B 2 06 P N 50923401 Spring Pressure Wide RSPL 521 B 2 06 P N 51228301 Arm Front Release Gear RSPL Both B 2 06 Copyright 1997 Okidata Division of OKI America Inc All rights res...

Page 132: ...3 2 06 3 2 07 and 3 2 16 2 Push the end A of the carriage shaft 1 until it clears the base frame 3 Pull the carriage shaft free of the base frame 4 Remove the support protect reset spring 2 5 Remove t...

Page 133: ...01 Protector Support Assembly RSPL Both B 2 04 P N 53563501 Shaft Carriage Narrow RSPL 520 B 2 04 P N 53563502 Shaft Carriage Wide RSPL 521 B 2 04 Copyright 1997 Okidata Division of OKI America Inc Al...

Page 134: ...4 Use a straight slot screwdriver to release the bottom extension 2 from the claw of the base frame 5 Pull the spring up to release the top of the spring from the upper claw 6 Repeat the above two st...

Page 135: ...Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 136: ...aper pan away from the main frame 3 Remove the pan 4 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 e...

Page 137: ...ront Release Gear RSPL 520 B 2 06 Narrow P N 51227901 Shaft Front Release Gear Wide RSPL 521 B 2 06 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Part...

Page 138: ...front pressure springs 3A and 3B NOTE The front pressure springs for the Microline 520 3A have three extensions The front pressure springs for the Microline 521 3B have one extension The Microline 52...

Page 139: ...Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 140: ...tion of arrow A and remove the shaft This shaft is square 6 Slide the upper tractor feed shaft 7 in the direction of arrow A and remove the shaft This shaft is round 7 Remove the left tractor assembly...

Page 141: ...P N 50097501 Tractor Assembly Narrow RSPL 520 B 2 06 P N 50097502 Tractor Assembly Wide RSPL 521 B 2 06 P N 51228001 Gear Change RSPL Both B 2 05 P N 51228101 Gear Tractor RSPL Both B 2 05...

Page 142: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 143: ...st be carried out to reach the base frame 1 P N 53563101 Frame Main Narrow RSPL 520 B 2 04 5 6 P N 53563201 Frame Main Wide RSPL 521 B 2 04 5 6 Copyright 1997 Okidata Division of OKI America Inc All r...

Page 144: ...dures 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...

Page 145: ...p portion of the characters differ from that of the bottom portion follow steps 10 12 This adjustment is comprised of four phases 1 Setup Phase Steps 1 5 The cover is removed and the printhead is plac...

Page 146: ...ure 0 014 0 001 inch 0 35 0 03 mm 8 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 9 Use a small phillips screwdriv...

Page 147: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 148: ...LIMITED OPERATION QUIET FF LOAD Hold during Power ON Reset Top of Form to Factory Default 1 inch QUIET Hold during Power ON Activate Rolling ASCII Test LF Hold during Power ON Activate Font Test SEL...

Page 149: ...h 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 GROUP until the desired...

Page 150: ...powering ON the printer Limited Operation General Information One of the menu selections that may be set by the end user is the operator panel function This is found in the Set up Group of the menu Op...

Page 151: ...aten and ribbon 4 Power off the printer 5 Press and hold the SEL switch while powering on the printer 6 The MENU lamp will light If the printer was selected the SELECT lamp will light When in Menu Mod...

Page 152: ...PPR Epson FX ML Font Print Mode Utility NLQ Courier NLQ Gothic HSD 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 II...

Page 153: ...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 154: ...t DEL Code 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 Printhead Gap Adjust 0 1 1 Model 521 only Appears only when Microl...

Page 155: ...ine 520 521 What you will actually see depends on the active emulation and the options installed Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner...

Page 156: ...nd hold the SHIFT switch while pressing the LF switch This will retract the paper in micro increments 4 This setting will be kept in memory until you power off the printer or until you change the sett...

Page 157: ...the single sheet paper Procedure Single Sheet to Continuous Feed 1 Remove any single sheet pages from the printer 2 Lower the paper separator to the Continuous Forms position rear feed 3 Move the pap...

Page 158: ...ting 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 unde...

Page 159: ...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 o...

Page 160: ...desired setting prints Off 500 mS 1 sec 2 sec 9 Press EXIT to save the change and exit Menu Mode Using 1 Load paper 2 Press FORM FEED 3 The paper will advance past the start print position Top of For...

Page 161: ...ides a reference of customized settings When the Menu is reset all customized settings are LOST 2 Power off the printer 3 Press and hold SEL and LF while powering ON the printer NOTE Refer to the Prin...

Page 162: ...ning 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 op...

Page 163: ...ubricating 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...

Page 164: ...trical Contacts and Connections 8 Space Rack 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 oc...

Page 165: ...e materials from Step 1 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 secur...

Page 166: ...res 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...

Page 167: ...rial number from the back of the printer Refer to the following to decode the serial number Example Printer Serial Number 401A0154693 Date Code 401 4 year 01 month Revision A Serial Number 0154693 Cop...

Page 168: ...p of the test is a header This header provides the following information printer model 1 emulation 2 country 3 firmware revision level 4 firmware part number 5 and character generator revision number...

Page 169: ...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 wh...

Page 170: ...vailable 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...

Page 171: ...ou respond by mail please use the appropriate address listed in the Service Center Reference Guide Information Provided Please provide the following information when reporting problems Okidata Dealer...

Page 172: ...efer 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 Okidat...

Page 173: ...replaced as recommended 4 Has the ribbon been installed properly 5 Is an Okidata ribbon being used 6 Is the printhead gap correctly set 7 Is the firmware the latest current revision 8 Are the printer...

Page 174: ...freely 4 Record the status of the ALARM PRINT QUALITY and CHARACTER PITCH Lamps 5 Refer to the Alarm Lamp Codes Table Section 4 6 6 Locate the error 7 Perform the designated corrective action Operati...

Page 175: ...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 o...

Page 176: ...utput is faded install a new ribbon then print another sample 2 Make sure that the paper you are using is within specifications Paper specifications can be found in Section 1 of this Service Handbook...

Page 177: ...e 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...

Page 178: ...t 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...

Page 179: ...ttings 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...

Page 180: ...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 spec...

Page 181: ...riate 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 Inconsistent Line Feed Possible Cau...

Page 182: ...d move smoothly If it does not remove the cause of the binding 2 Refer to the next section and or Technical Service Bulletin 3309 Copyright 1997 Okidata Division of OKI America Inc All rights reserved...

Page 183: ...the space motor gear from fully engaging with the space rack This will result in slippage problems which will affect spacing operations 3 Check the printhead cable connections between the main contro...

Page 184: ...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 0...

Page 185: ...r are making good contact NOTE Reference Numbers 25 and 26 use identical Operator Panel displays ALAR M UTILITY PRO P NLQ HSD 10 12 15 17 20 SE L MENU Referen ce Number Blinkin g On On 1 Blinkin g On...

Page 186: ...linkin g On On 19 Blinkin g On On 20 Blinkin g On On 21 On On On On On 22 On Blin kin g On 23 On Blin kin g On 24 On On On Blinkin g 25 On On On Blinkin g 26 Copyright 1997 Okidata Division of OKI Ame...

Page 187: ...e the main control board the carriage cable and the printhead 4 Printhead Gap Alarm Self adjustment was not successful Check the printhead connection Then replace the main control board the carriage c...

Page 188: ...space motor 10 MPU Internal RAM Alarm Read write error Replace the main control board 11 Program ROM Alarm Check sum error Replace the main control board and or ROM 12 RAM on Main Control Board Read w...

Page 189: ...steps 1 Go to the RAP Index 2 Find the RAP which is associated with the printers problem 3 Go to the appropriate RAP 4 All RAPs begin with a START statement followed by questions or another type of s...

Page 190: ...r 4 Paper Jam During Paper Loading 5 Printhead Not Firing Pins 6 Poor Print Quality 7 Ribbon Feed Problem 8 Line Feed Problem 9 Operator Panel Malfunction 10 Parallel Interface Problem 11 Serial Inter...

Page 191: ...oltage 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 Check operation before replacing next...

Page 192: ...4 PROM 05CA Has the problem been resolved Yes End of procedure No Contact Technical Support Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exch...

Page 193: ...the space rack and the space motor gear 4 Go to 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 control board H...

Page 194: ...lved Yes End of procedure No Contact Technical Support Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this mate...

Page 195: ...d 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 assembl...

Page 196: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 197: ...ler mechanism Check the front pressure springs to see that they are mounted properly There are three springs in the Microline 520 and five springs in the Microline 521 Check the tension of all the fro...

Page 198: ...en 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 Rep...

Page 199: ...mbly Replace the cable if it is worn or bent Has the problem been resolved Yes End of procedure No Contact Technical Support B Adjust the print head gap Refer to Section 3 of this Service Handbook Has...

Page 200: ...hange 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...

Page 201: ...he 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...

Page 202: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 203: ...e 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...

Page 204: ...m been resolved No Disconnect the cable Does the SEL LED light Yes Change the menu item I prime to invalid No Go to A Yes Is data being received properly Yes End of procedure No Check that the cable i...

Page 205: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 206: ...A No Go to A A Check the serial interface parameters for the RS232C in the Printer Menu baud rate word length parity protocol busy signal and parity Has the problem been resolved Yes End of procedure...

Page 207: ...e 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 Copyright 19...

Page 208: ...xadecimal Dump Mode The Rolling ASCII 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 d...

Page 209: ...AUTION Before running this test make sure that continuous feed paper is loaded If you are running this test on a Microline 521 use wide paper or have the page width set for 8 5 x 11 in the printer men...

Page 210: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 211: ...n 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 al...

Page 212: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 213: ...rints 7 The size of the Message Buffer prints 8 One of the following three messages prints next If the message OK prints the message buffer has been tested and no problems were found If the message BA...

Page 214: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 215: ...to determine the cable requirements on the computers end The printer has the following cable requirements Shielded RS 232C cable UL and CSA approved No more than 50 feet long Cannon DB 25P plug or equ...

Page 216: ...ter 4 Failure Repair Analysis Serial Interface Signal Requirements Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates...

Page 217: ...d Serial Cable Configurations IBM 25 Pin Cable Configuration Computer Printer IBM 9 Pin Cable Configuration Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Busin...

Page 218: ...B 30 1E 54 68 69 73 20 69 73 20 61 6E 20 65 78 0 61 6D 70 6C 65 20 66 20 61 20 68 65 78 61 64 65 63 69 6D 61 6C 20 64 75 6D 70 2E 0D 0A Procedure Follow these steps to engage the Hexadecimal Dump Mode...

Page 219: ...o 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 pri...

Page 220: ...20 521 Chapter 4 Failure Repair Analysis Layout Diagram Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this mat...

Page 221: ...to Printhead NOTE The printhead coil resistance values ARE NOT LISTED The individual printwire control lines CANNOT be accessed on this printhead Copyright 1997 Okidata Division of OKI America Inc Al...

Page 222: ...4 9 03 Line Feed Motor Resistance The resistance of each coil should be approximately 13 ohms Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner E...

Page 223: ...sis 4 9 04 Space Motor Resistance The resistance of each coil should be approximately 5 ohms Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exc...

Page 224: ...circuit boards used in the unit The following areas are covered Function Firmware Fuses Jumpers Sensors Switches Test Points Where an item is not applicable the word NONE will be listed Copyright 199...

Page 225: ...ler Board FJIM A 2 01 Operator Panel Board LEOP A 2 02 Power Supply Assembly N A A 2 03 Space Motor Board N A A 2 04 RS232 C Serial Interface Board LXHI A 2 05 Copyright 1997 Okidata Division of OKI A...

Page 226: ...ML520 521 Chapter A Reference Charts Board Layout Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material...

Page 227: ...ed on the main controller board Firmware 05CB CMOS Dynamic RAM 1 MBit 05CA EPROM Program Fuses F1 125 Volt 2 amp AC line fuse F2 soldered 2 amp protects the 40vdc motor drive circuit Jumpers NONE Sens...

Page 228: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 229: ...to the microprocessors serial I O port whenever the operator panels switches are pressed The operator panel LED display provides information on fault alarms and printer status Firmware NONE Fuses NONE...

Page 230: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 231: ...The power supply board provides AC voltages to the main controller board via CN 3 Firmware NONE Fuses F1 125 250V 2 5 amp AC line fuse Jumpers NONE Sensors NONE Switches SW Power Switch Test Points Tr...

Page 232: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 233: ...tains an encoder disk and photosensor The encoder disk and the photosensor generate phase signals These signals governs the speed and direction of the space motor via the LSI and microprocessor Firmwa...

Page 234: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 235: ...Function This board provides you serial interface capabilities The serial interface parameters can be set through the printer menu Firmware Masked to the MPU Socket is empty Fuses NONE Jumpers SP1 EPR...

Page 236: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 237: ...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 Maintenanc...

Page 238: ...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 Eve...

Page 239: ...Facts is an automated 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 Guid...

Page 240: ...a 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...

Page 241: ...he Microline 520 printer 521 This part is specific to the Microline 521 printer Both This part is used by both the Microline 520 and Microline 521 printers Copyright 1997 Okidata Division of OKI Ameri...

Page 242: ...res 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 Ref...

Page 243: ...ssembly 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...

Page 244: ...L520 521 Chapter B Illustrated Parts Listing Overview Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this mater...

Page 245: ...sassembly Procedure 1 62409001 N A Printer ML520 Parallel Epson IBM ML Comp 120 V N A 2 62409002 N A Printer ML520 Parallel Epson IBM ML Comp 220 V N A 3 62410001 N A Printer ML521 Parallel Epson IBM...

Page 246: ...tion Comments Refer to B 1 02 Disassembly Procedure 1 53066902 1PP4094 6501P2 Cover Upper Narrow RSPL 520 3 2 06 1 53067002 1PP4094 7201P2 Cover Upper Wide RSPL 521 3 2 06 2 51009401 N A Guide Sheet N...

Page 247: ...094 7382G1 Cover Access Wide RSPL 521 3 2 06 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http...

Page 248: ...ki J P N Description Comments Refer to B 1 02 Disassembly Procedure 1 53562601 2PP4094 6507P3 Knob Platen ML500 Series RSPL Both 3 2 06 2 53067301 2PP4094 6506P1 Cover B for Card Slot RSPL Both 3 2 06...

Page 249: ...oth 3 2 08 9 56609701 3YS4011 1315P1 Cord AC 120V RSPL Both 3 2 01 10 50099501 4YA4023 2801G1 Printhead Assembly RSPL Both 3 2 02 11 50707501 4PP4025 3621P1 Clamp Cord RSPL Both 3 2 08 12 56306201 540...

Page 250: ...63101 3PA4025 3720G1 Frame Main Narrow RSPL 520 3 2 30 1 53563201 3PA4025 3721G1 Frame Main Wide RSPL 521 3 2 30 2 50804601 3PP4025 3315P1 Lever Bottom Paper End RSPL Both 3 2 27 3 50804701 3PP4025 33...

Page 251: ...k Space Wide RSPL 521 3 2 13 13 50923501 4PB4025 3377P1 Spring Tension Space Rack RSPL Both 3 2 13 14 51009701 4PP4025 3378P1 Guide Rail Ground Clip RSPL Both 3 2 15 15 51009801 3PP4025 3379P1 Guide R...

Page 252: ...omments Refer to B 1 02 Disassembly Procedure 1 53563101 3PA4025 3720G1 Frame Main Narrow RSPL 520 3 2 30 1 53563201 3PA4025 3721G1 Frame Main Wide RSPL 521 3 2 30 2 51228001 4PP4025 3340P1 Gear Chang...

Page 253: ...9 50098301 3PA4025 3370G1 Platen Assembly Narrow RSPL 520 3 2 19 9 50098302 N A Platen Assembly Wide RSPL 521 3 2 19 10 53341501 3PA4025 3440G2 Roller Pull Up Assembly N RSPL 520 3 2 05 10 53341601 3...

Page 254: ...Description Comments Refer to B 1 02 Disassembly Procedure 1 53563101 3PA4025 3720G1 Frame Main Narrow RSPL 520 3 2 30 1 53563201 3PA4025 3721G1 Frame Main Wide RSPL 521 3 2 30 2 50922901 4PP4025 3316...

Page 255: ...025 3511G1 Spring Pressure Wide RSPL 521 3 2 24 9 50805201 4PP4025 3351P1 Lever Switch Cut Sheet Continuous RSPL Both 3 2 24 10 51228301 4PP4025 3350P1 Arm Front Release Gear RSPL Both 3 2 24 11 50924...

Page 256: ...Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX for any updates to this material http bpx okidata com...

Page 257: ...rriage Assembly Item Okidata P N Oki J P N Description Comments Refer to B 1 02 Disassembly Procedure 1 50707401 3PP4025 3431P1 Clamp Head RSPL Both 3 2 02 2 53562801 3PP4025 3430P1 Protector Ribbon R...

Page 258: ...P1 Guide Roller Spring Both 3 2 11 13 56627301 2PU4007 1193P1 Cable Carriage Narrow RSPL 520 3 2 12 13 56627302 N A Cable Carriage Wide RSPL 521 3 2 12 14 53343201 4PA4025 3718G1 Assembly Roller Holde...

Page 259: ...nts Refer to B 1 02 Disassembly Procedure 1 70022501 N A Kit Single Bin CSF 5000 Narrow Option 520 N A 1 70022701 N A Kit Single Bin CSF 5001 Wide Option 521 N A 2 70023001 N A Kit Pull Tractor Narrow...

Page 260: ...ML Series Right Angle Option RSPL Both N A 8 56624401 3YS4011 1268P1 Cord AC 240V Option RSPL Both N A 9 55038901 4YA4021 1050G1 PCB LXHI RS232 C Option RSPL Both N A 10 56306001 4YB4021 1146P1 Fuse...

Page 261: ...8201 2PP4094 7384G1 Tractor Cover Assembly W Pull Tractor Option RSPL 521 N A 4 50098501 2PA4094 6510G1 Stand Bottom Push Right Option RSPL Both N A 5 50098502 2PA4094 6510G4 Stand Bottom Push Left Op...

Page 262: ...L Both N A 12 56510501 3PB4050 2560P1 Motor Pulse Cut Sheet Feeder Option RSPL Both N A 13 56627501 3YS4011 5120G1 Cable CSF Cut Sheet Feeder Option RSPL Both N A 14 50062801 4PB4053 1705G1 Roller Hop...

Page 263: ...Parts Listing B 2 10 Consumables 52107001 N A Ribbon Black Consumable Both 3 2 02 Copyright 1997 Okidata Division of OKI America Inc All rights reserved See the OKIDATA Business Partner Exchange BPX...

Page 264: ...y Procedure 1 53565101 N A Box Graphic ML520 RSPL 520 N A 1 53565201 N A Box Graphic ML521 RSPL 521 N A 2 53565401 N A Foam Molded Left RSPL Both N A 3 53565402 N A Foam Molded Right RSPL Both N A Cop...

Page 265: ...1 N A Card QA Reply Document Part of 2 A N A 4 A 53436029 N A Bag Poly 9 x 12 Document Part of 2 A N A 5 A 52050809 N A Card Request Document Part of 2 A N A 6 A 58059501 N A Card Registration Documen...

Page 266: ...terature 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 t...

Page 267: ...9501 N A Administration Package Document N A 4 A 58090301 N A Envelope Administration Package Document N A 5 A 58090401 N A Cover Letter Document N A 6 A 59257701 N A Training Guide Document N A 7 A 5...

Page 268: ...r to B 1 02 Disassembly Procedure 1 B 58229402 N A Kit ML520 521 Service Training Document Both N A 2 B 52063205 N A Label Box Document Both N A 3 B 58090402 N A Read Me First Document Both N A 4 B 59...

Page 269: ...nt Both N A 5 C 59256802 N A Printer Handbook Document Both N A 6 C 58306101 N A Sheet Printer Handbook Errata Document Both N A 7 C 57519802 N A Service Videotape Document Both N A 8 C 52063204 Rev B...

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