Lexmark 2391 Service Manual

Lexmark 2391 - Plus B/W Dot-matrix Printer Manual

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  • Lexmark 2391 | Service Manual - Page 1
    Lexmark 23XX Series 23XX-XXX • Table of Contents • Start Diagnostics • Safety and Notices • Trademarks • Index • Manuals Menu Lexmark and Lexmark with diamond design are trademarks of Lexmark International, Inc., registered in the United States and/or other countries.
  • Lexmark 2391 | Service Manual - Page 2
    form for reader's comments is provided at the back of this publication. If the form has been removed, comments may be addressed to Lexmark set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013 and in applicable FAR provisions: Lexmark
  • Lexmark 2391 | Service Manual - Page 3
    2-26 Paper Feed Service Check 2-27 Paper Select Sensor Service Check 2-30 POST Service Check 2-31 Power Service Check 2-32 Print Speed Service Check 2-34 Printhead Service Check 2-36 Pull Tractor Sensor Service Check 2-38 Top of Forms Problem Service Check 2-39 Tractor 2 Service Check 2-40
  • Lexmark 2391 | Service Manual - Page 4
    4-1 Handling ESD-Sensitive Parts 4-1 Adjustments 4-2 Printhead-to Form Thickness Lever Removal 4-22 Head Gap Sensor Removal (238X-001 4-23 Head Gap Sensor Removal (23XX-002, 003 Removal 4-38 Paper Guide Removal (Left And Right 4-39 Paper Guide / Platen Assembly Removal Service Manual
  • Lexmark 2391 | Service Manual - Page 5
    Ribbon Drive Rack Gear Removal 4-54 Right Side Frame Removal 4-56 Right Side Frame Gears Removal 4-58 Sub Logic Board Removal 4-59 Tension Pulley Plate Assembly 4-60 Top Cover Removal 4-61 Top of Form -002 5-8 Block Diagram 238X-003 5-9 Block Diagram 239X-003 5-10 Signal Connections 5-11
  • Lexmark 2391 | Service Manual - Page 6
    1: Major Components 7-2 Assembly 2: Covers 7-6 Assembly 3: Carrier 7-10 Assembly 4: Paper Guide / Platen / Feed Roller 7-16 Assembly 5: Electronics 7-20 Assembly 6: ASF - Roller / Support 7-26 Assembly 7: ASF - Side Frame / Covers 7-28 Assembly 8:Tractor 2 Option 7-30 viii Service Manual
  • Lexmark 2391 | Service Manual - Page 7
    electric shock and personal injury during disassembly and servicing of this product. Professional service personnel should understand this and take necessary precautions. • The safety features of some parts may not always be obvious. Therefore, replacement parts must have the identical or equivalent
  • Lexmark 2391 | Service Manual - Page 8
    Norme di sicurezza • Le informazioni riguardanti la manutenzione di questo prodotto sono indirizzate soltanto al personale di assistenza autorizzato. • Durante lo smontaggio e la manutenzione di questo prodotto, il rischio di subire scosse elettriche e danni alla persona è più elevato. Il personale
  • Lexmark 2391 | Service Manual - Page 9
    Informació de Seguretat • La informació pel manteniment d'aquest producte està orientada exclusivament a professionals i no està destinada a ningú que no ho sigui. • El risc de xoc elèctric i de danys personals pot augmentar durant el procés de desmuntatge i de servei d'aquest producte. El personal
  • Lexmark 2391 | Service Manual - Page 10
    Korean Safety Information xii
  • Lexmark 2391 | Service Manual - Page 11
    code table, symptom table, and service checks used to isolate failing field replaceable units (FRUs). • "Diagnostic Aids" contains tests and checks used to locate or repeat symptoms of printer problems. • "Repair Information" provides instructions for making printer adjustments and removing and
  • Lexmark 2391 | Service Manual - Page 12
    xiv
  • Lexmark 2391 | Service Manual - Page 13
    The Lexmark 238X and 239X - XXX printers are small versatile tabletop printers suitable for use in the home or small business. They are especially well-suited for applications that use continuous or multipart forms. The 2381 and 2391 are wide-carriage versions of the 2380 and 2390. The 23XX Plus
  • Lexmark 2391 | Service Manual - Page 14
    2381 2390 2391 N/A 2380 Plus 2381 Plus 2390 Plus 2391 Plus Forms Printer 2380 Plus Forms Printer 2381 Plus Forms Printer 2390 Plus Forms Printer 2391 Plus Mach Type Model # 2380-001 2381-001 2390-001 2391-001 2390-PS1 2380-002 2381-002 2390-002 2391-002 2380-003 2381-003 2390-003 2391-003 No. of
  • Lexmark 2391 | Service Manual - Page 15
    days per month. To reduce the probability of reliability/service problems, field data has shown printer usage should not exceed twice the daily page usage. Notes: • All numbers are average or estimates. • Performance of individual printers may vary. • Lexmark does not represent or warrant that
  • Lexmark 2391 | Service Manual - Page 16
    238X/239X printers: • Auto Sheet Feeder (ASF) • 32Kb Memory Module, Volatile • 32Kb Memory Module, Non-volatile • Serial Interface Attachment (RS232/RS422). • Extended National Language Support modules (World Trade only) • Acoustics Option • Extended Cut-sheet Paper Guides • Tractor 2 (23XX-003 Only
  • Lexmark 2391 | Service Manual - Page 17
    Random Access Memory Original Equipment Manufacturer Power-On Reset Power-On Self Test Print Quality Enhancement Technology Read-Only Storage Static Random Access Memory Used Parts Replacement Volts alternating current Volts direct current General Information 1-5
  • Lexmark 2391 | Service Manual - Page 18
    Mode How To Change The Printer Functions 1. Make sure continuous forms are in the printer. 2. Press Alt and then press Setup to enter Setup Mode.The printer prints out the Main Menu. 3. To select a function, press the buttons listed on the printout. 4. To save the setting and leave Setup Mode, press
  • Lexmark 2391 | Service Manual - Page 19
    • Some adapters may be installed on printers other than what is listed. • Only the "Black" adapter is available as a FRU. • Changes to switch settings are valid only after printer power is turned off and then on again. • Contact Lexmark Technical Support for questions about serial adapters. General
  • Lexmark 2391 | Service Manual - Page 20
    Switches The serial interface has 12 function switches which determine how the printer receives data from the computer or terminal. Set the switches according to your particular equipment requirements. Function Switch Setting Switches 1 To 4 - Speed: Define the serial interface speed in bits per
  • Lexmark 2391 | Service Manual - Page 21
    Black Serial Adapter Switch 1 N/A On On Off Off Off Off On On Switch 2 N/A Off Off On On Off Off On On Switch 3 N/A On Off On Off On Off On Off Speed (bps) 150 300 600 1,200 2,400 4,800 9,600 19,200 38,400 (RS-422 Only) Switch 5 - Data Bits: Selects the number of data bits (7 or 8) in each data
  • Lexmark 2391 | Service Manual - Page 22
    On On Switch 7 Off On Off On Parity No Ignore Odd Even Note: When setting the "Ignore" for parity, the printer ignores the received parity and transmits using even parity. For all other parity settings, the transmitted parity matches the received parity. Switch 8 - Stop Bits (Snap-On):. Switch
  • Lexmark 2391 | Service Manual - Page 23
    Switch 9 - Protocol: Selects the type of protocol. Differs depending on which serial interface unit is installed. Snap-On and Gray Units Switch 9 Off On Protocol Snap-On XON/XOFF DTR pacing (RS232 only) Gray DTR Pacing (RS232 only) XON/XOFF Black Units Switch 4 Off Off On Off Switch 9 On Off
  • Lexmark 2391 | Service Manual - Page 24
    line for the RS-422 serial interface. Switch 11 Off On Mode Normal Reverse Switch 12 - Serial Interface Mode Select: (All Units) Switch 232/422 sets the serial interface in either RS-232C or RS-422 mode. Switch 12 Off On Mode RS-232C RS-422 1-12
  • Lexmark 2391 | Service Manual - Page 25
    2. Diagnostic Information Start Make a quick visual check for defects (loose or broken parts, unplugged connectors, paper jams, and so on). Voltage, Ground, And Continuity Readings Voltage Readings All DC voltages must be within +5% through -10% of the values
  • Lexmark 2391 | Service Manual - Page 26
    Error Indication Table The following table describes the service check entries for the printer error indication codes. When an error indication changes after you have entered a service check, you have an intermittent problem. If this occurs, leave the service check and go to "Symptom/Check Table" on
  • Lexmark 2391 | Service Manual - Page 27
    adjustment. If the printer completes POST successfully and eventually gets the same error, go to "Intermittent Problem Service Check" on page Sensor, Ribbon Feed Service Check" on page 2-17. Tractor 2 Home Position Error If Tractor 2 is installed, remove it to determine whether the problem is with
  • Lexmark 2391 | Service Manual - Page 28
    during power-up, replace the main logic board and readjust the bidirectional print adjustment. If the printer completes POST successfully and eventually gets the same error check, go to "Intermittent Problem Service Check" on page 2-20. LED Power Ready Paper Font Pitch Alt Others Status ON BLINK
  • Lexmark 2391 | Service Manual - Page 29
    Any None None None Beeps 7 times Go to "POST Service Check" on page 2-31. Go to "Operator Panel Service Check" on page 2-24. Go to "Power Service Check" on page 2-32. (Optional Serial Interface Adapter installed) • Turn the printer off and check the connection from the serial interface adapter to
  • Lexmark 2391 | Service Manual - Page 30
    idling, abnormal noise comes from the printer. When feeding paper, abnormal noise is created. During printing or POST, abnormal noise is created. Action Check the ribbon cartridge for binds or damage. Go to the "Carrier Drive, Home Position Sensor, Ribbon Feed Service Check" on page 2-17. Go to
  • Lexmark 2391 | Service Manual - Page 31
    Problems Symptom Printer will not print, or become Ready. Abnormal operation, incorrect characters, or incorrect line width. Printer No Print or Abnormal Print Service Check" on page 2-23. Go to the "Print Speed Service Check" on page 2-34. Auto Sheet Feeder Problems Symptom Auto sheet feeder will
  • Lexmark 2391 | Service Manual - Page 32
    is in the printer and ASF is not installed. Print operation starts without paper. Alt + Park/Load does not function when the push tractor is installed. Form feed length is not correct. Alt + Park/Load functions with cut sheets in use. Action Go to the "Paper Empty Sensor Service Check" on page
  • Lexmark 2391 | Service Manual - Page 33
    select lever is in the tractor position. Go to the "Pull Tractor Sensor Service Check" on page 2-38. Be sure the paper select lever is in the correct position. Go to the "Paper Feed Service Check" on page 2-27. Go to the "Top of Forms Problem Service Check" on page 2-39. Diagnostic Information 2-9
  • Lexmark 2391 | Service Manual - Page 34
    page 2-24. Power Problems Symptom When the power switch is on, the Power light does not turn on or the printer does not start. The Power light blinks or changes intensity. Action Check continuity of the power cord and the voltage of the user's outlet. Go to the "Power Service Check" on page 2-32
  • Lexmark 2391 | Service Manual - Page 35
    . Set the form thickness lever to position "1" and run the print test. Go to the "Carrier Drive, Home Position Sensor, Ribbon Feed Service Check" on page 2-17. Clean the printhead nose. Clean the ribbon guide and shield. If the ribbon has reached its end of life or is worn, the ribbon cartridge
  • Lexmark 2391 | Service Manual - Page 36
    unit. Go to the "Carrier Drive, Home Position Sensor, Ribbon Feed Service Check" on page 2-17. Ribbon Feed Problems Symptom Ribbon comes off, becomes loose or folded, or jams. Ribbon feeds correctly but is noisy. Action Check the ribbon cartridge for binds or damage. Go to the "Carrier Drive
  • Lexmark 2391 | Service Manual - Page 37
    an operator error. If this indication cannot be recovered, the problem may be the paper empty sensor or the paper select sensor. Check the following in the order listed and if the printer does not work correctly, go to the indicated service check. Paper Empty Sensor Action Remove all paper from the
  • Lexmark 2391 | Service Manual - Page 38
    Checks Abnormal Noise Service Check Check the entire printer for loose parts. FRU 1 Ribbon Cartridge 2 Printhead 3 Carrier Motor Ribbon Drive Mechanism 4 Paper Feed Mechanism Action Remove and reinstall the ribbon cartridge. Disconnect the printhead cables. Run the print test (do not fold or
  • Lexmark 2391 | Service Manual - Page 39
    the ASF installed by moving the paper select lever to continuous forms and pressing Start to feed the continuous forms to the first print line. The ASF contains no electrical parts. It is driven from the gear on the inside of the printer's right side frame. The combination lock mechanism is a clutch
  • Lexmark 2391 | Service Manual - Page 40
    2 Paper Feed If the paper does not feed, do the following: 3 Gear Train • Remove the ASF. • Be sure the base printer feeds paper correctly. • If it does not feed paper correctly, go to the "Paper Feed Service Check" on page 2-27. Be sure the ASF drive gear on the inside of the
  • Lexmark 2391 | Service Manual - Page 41
    Carrier Drive, Home Position Sensor, Ribbon Feed Service Check 23XX-001 only: If the carrier stops but the print wires continue to fire (printing one vertical column of dots), or if the carrier does not move after turning the printer off and then on, inspect the area of the main logic board that is
  • Lexmark 2391 | Service Manual - Page 42
    Position Sensor Sub Logic Board Short Flexible Cable Action If there is no Home Position Error, check the carrier belt and the ribbon cartridge for wear or damage. Check the belt and pulley engagement. Manually move the carrier the full length of the carriage to check for binds and to make sure the
  • Lexmark 2391 | Service Manual - Page 43
    carrier motor windings are from 1 to 5 ohms for all printers. 4 Main Logic Board 238X-001,002,003 239X-002,003 CP9-1 & CP9-5 CP9-2 & CP9-6 CP9-3 & CP9-5 CP9-4 & CP9-6 239X-001 CP9-1 & CP9-6 CP9-2 & CP9-5 CP9-3 & CP9-6 CP9-4 & CP9-5 If all parts
  • Lexmark 2391 | Service Manual - Page 44
    Intermittent Problem Service Check FRU/Symptom 1 The machine sometimes fails before supply cable from the connectors CN11 on the main logic board and CN1 on the sub logic board. Turn the printer power on and check all dc output voltages at CP11 and CP1. Ensure the output voltages are: CP11-1 (+26
  • Lexmark 2391 | Service Manual - Page 45
    problem on the sub logic board. Turn the printer power on and check all dc output If one of the voltages is 0, go to the "Power Service Check" on page 2-32. If the voltages are not 0 but ribbon shield and printhead. • Clean the platen surface. • Install the ribbon cartridge correctly. • If the ribbon
  • Lexmark 2391 | Service Manual - Page 46
    4 If the prior suggestions have not corrected the problem. The service check has not defined the failure, or the machine a.Reconnect the connectors of all FRUs and printer interface cables. b.Check the continuity of the line cord. 5 Problem occurs only in specific customer applications. 3.
  • Lexmark 2391 | Service Manual - Page 47
    Abnormal Print Service Check FRU computer settings. • Make sure the serial adapter power cable, if present, is securely connected to the printer power connector printer and serial interface adapter are working correctly. The problem may be with the interface cable, the computer, the printer driver
  • Lexmark 2391 | Service Manual - Page 48
    Operator Panel Service Check Note: If the Op-Panel Asm is locked, only the Start/Stop, Form Feed, Alt + Tear Off and Alt + Park/Load buttons are active. Model 2 and 3 printers have a "Lock" LED to indicate that the operator panel is locked. To unlock the operator panel, turn the printer off and then
  • Lexmark 2391 | Service Manual - Page 49
    -1 & CN8-6 239X-001 CP3-4 & CN7-5 CP3-3 & CN7-6 CP3-2 & CN7-4 CP3-1 & CN7-8 239X-002,003 CP3-4 & CN7-2 CP3-3 & CN7-4 CP3-2 & CN7-8 CP3-1 & CN7-6 Replace the short flexible cable or the sub logic board as necessary. If there is still a problem, replace the operator panel. If that does not fix the
  • Lexmark 2391 | Service Manual - Page 50
    as a paper empty sensor and also determines the top of form setting. 23XX-002 and 23XX-003 machines have two sensors: • The left sensor is paper empty. • The right sensor is Top of Form. FRU Action 1 Paper Empty Sensor With no paper in the printer, the tractor in the push position, and the paper
  • Lexmark 2391 | Service Manual - Page 51
    the ASF installed. If the printer fails only with the Auto Sheet Feeder installed, refer to the "Auto Sheet Feeder (ASF) Service Check" on page 2-15. Remove all paper from the machine. Press Form Feed several times and examine all rotating parts to find the problem. For better visibility, remove the
  • Lexmark 2391 | Service Manual - Page 52
    parts as you move the paper select lever: 4 Operator Panel • The tractor gear engages correctly in the continuous forms If it does not, go to the "Operator Panel Service Check" on page 2-24. 5 Paper Feed Motor to CP10-6 23XX-003 = 8 to 9 ohms. CP10-1 to CP10-5 CP10-2 to CP10-5 CP10-3 to
  • Lexmark 2391 | Service Manual - Page 53
    With the lever in the continuous forms position (sensor closed), the gear train should rotate for more than 3 seconds. If the printer does not do this, inspect the reload. Refer to the "Pull Tractor Sensor Service Check" on page 2-38. If no other problem is found replace the main logic board. Reset
  • Lexmark 2391 | Service Manual - Page 54
    Paper Select Sensor Service Check If form feed length is off by about 1 inch (25 mm), enter Setup Mode and verify that the form length setting is correct. See the Setup Mode and Switch Settings section. FRU 1 Paper Select Sensor Action Remove all paper from the printer and place the tractor in
  • Lexmark 2391 | Service Manual - Page 55
    Service Check" on page 2-32. 2 Cables A faulty interface cable can cause POST errors. Disconnect the interface cable from the printer and turn the printer problem is found, the problem may be in either the operator panel or the main logic board. Replace the operator panel and retest the printer
  • Lexmark 2391 | Service Manual - Page 56
    to the left during after turning the printer off and then on, but the power LED is not on steady: Make sure the sub logic board is receiving voltage by checking for +5 V dc at sub logic board CN1-3. • If no voltage or power cable problem is found, make sure there is +5 V on
  • Lexmark 2391 | Service Manual - Page 57
    the sub logic board and make sure none of the leads on the cable are shorted to ground. If no problem is found with other components but the printer still has a power problem, replace the main logic board. Reset the bidirectional print adjustment; refer to "Bidirectional Print Adjustment" on page
  • Lexmark 2391 | Service Manual - Page 58
    Print Speed Service Check Reduced speed while printing the top 2 inch (51 mm) of a job is normal; for Model 003 printers, the slow down can be eliminated by entering Setup Mode and disabling TOF Read. The speed of the 23XX printers varies with the font, forms thickness setting and printhead
  • Lexmark 2391 | Service Manual - Page 59
    the function of the head gap sensor by 23XX-001 moving the forms thickness lever from 6 to 7 and back while printing the Demo Page Alt + Demo. Print speed is reset at the beginning of each line; listen for the printer to slow down in position 7. Disconnect the head gap sensor from connector
  • Lexmark 2391 | Service Manual - Page 60
    Printhead Service Check FRU Action 1 Printhead Cables Printhead If the problem is missing or extra dots or lines, do the following: • Check the continuity and connection of the printhead cables and the short flexible cable. • Make
  • Lexmark 2391 | Service Manual - Page 61
    & CP9-12 (Dot19) CP9- 1 & CP9- 6 (Dot20) CP9-13 & CP9-14 (Dot21) CP9- 3 & CP9- 6 (Dot22) CP9-11 & CP9-14 (Dot23) CP9- 5 & CP9- 6 (Dot24) If the problem is not missing or extra dots or lines, do the following: • Make sure the printhead is securely installed in the carrier. • Perform the Printhead-to
  • Lexmark 2391 | Service Manual - Page 62
    FRU 2 Carrier Shaft Carrier Unit Platen Assembly Printhead Nose Ribbon Guide Action Check and replace worn or damaged parts. Pull Tractor Sensor Service Check Note: The pull tractor sensor detects the tractor in the pull position and disables park/load and auto tear-off. A failed sensor may
  • Lexmark 2391 | Service Manual - Page 63
    sensor that serves as a paper empty sensor and also determines the top of form setting. For top of forms problems on 23XX-001 printers, refer to the "Paper Empty Sensor Service Check" on page 2-26. 23XX-002 and 23XX-003 machines have two sensors: • The left sensor is paper empty. • The right sensor
  • Lexmark 2391 | Service Manual - Page 64
    Tractor 2 Service Check Note: This option can be used only on 23XX-003 printers. The Tractor 2 in-place sensor opens during installation, when its actuator touches the printer cover. The home sensor detects the position of the slider. • When Tractor 2 is selected the motor-driven Tractor 2 slider
  • Lexmark 2391 | Service Manual - Page 65
    indication is used for carrier home failure.) FRU Action 1 Tractor 2 Home Sensor Remove the Tractor 2 and turn the printer off and then on again to determine if the fault is in the printer or Tractor 2. 2 Main Logic Board If the gear teeth chatter just before the beeps, replace the home sensor
  • Lexmark 2391 | Service Manual - Page 66
    For information on the Tractor 2 cable connectors, see "Tractor 2 Cable Connectors" on page 5-4. 2 Main Logic Board Check the cable connection from Tractor 2 to the printer. If possible, try the Tractor 2 with another printer to determine if the problem is the Tractor 2 board/cable assembly or the
  • Lexmark 2391 | Service Manual - Page 67
    Feed Problems FRU 1 Tractor 2 Action On the printer, make sure the gear that drives Tractor 2 turns freely when the lever is not pressed, but remain still when the lever is pressed. Remove Tractor 2 from the printer and remove all paper. With the paper select lever in the continuous forms position
  • Lexmark 2391 | Service Manual - Page 68
    2-44
  • Lexmark 2391 | Service Manual - Page 69
    self tests to help find and solve problems. You need not connect the printer to a computer or terminal to run these with printhead at extreme left) Alt + Macro (23XX-002, 003) Does This: Print test with sample fonts. Sets printer in Hex Dump mode. Disables/Enables Operator Panel Lockout Mode.
  • Lexmark 2391 | Service Manual - Page 70
    LEDs on the operator panel work. The LEDs turn on and off after the printer is turned on then all LEDs turn on for a few seconds. • RAM Test sensor, then moves to the first print position.) • Feed Initialization (Form feed motor rotates forward, then backward.) If any errors occur during the
  • Lexmark 2391 | Service Manual - Page 71
    troubleshoot the printer. To start the print test, do the following: 1. Paper must be at the print position; test does not print if paper is parked. 2. Press and hold Line Feed and then turn the printer 2391 print test, be sure wide paper is loaded in the machine, and that the right margin is set to
  • Lexmark 2391 | Service Manual - Page 72
    Print Test Sample (9 wire) Print Test Sample (24 wire) 3-4
  • Lexmark 2391 | Service Manual - Page 73
    Hex Dump Mode The hex dump mode can help the user test and troubleshoot programs. You can use the hex dump procedure to get a hexadecimal printout of the data stream sent to the printer. All data, including both control and character data, print in hexadecimal instead of ASCII. To activate hex dump
  • Lexmark 2391 | Service Manual - Page 74
    off. 2. Turn on serial interface Switch 10. 3. Turn the printer on. If the printer does not generate a printout, there is a problem with the serial interface adapter or its connection to the printer. Check the switch settings and be sure the serial interface adapter is correctly installed. When the
  • Lexmark 2391 | Service Manual - Page 75
    procedures and checking adjustments as needed. Handling ESD-Sensitive Parts Many electronic products use parts that are known to be sensitive to electrostatic discharge (ESD). To prevent damage to ESD-sensitive parts, follow the instructions below in addition to all the usual precautions, such
  • Lexmark 2391 | Service Manual - Page 76
    and the right end of the platen before you turn the printer on. Perform the printhead-to-platen gap adjustment after replacing or disassembling any of the following parts: • Carrier • Platen • Pinch Roller (Lower) • Ribbon Drive Rack Gear • Side Frame (Left) • Side Frame (Right) • Paper Separator
  • Lexmark 2391 | Service Manual - Page 77
    1. Turn the printer off. 2. Remove the ribbon access cover. 3. Remove the ribbon cartridge and paper. 4. Set the form thickness lever to position 1. 5. Move the carrier so that it is just to the left of the left upper feed roller, approximately 50 mm (2.0 in.)
  • Lexmark 2391 | Service Manual - Page 78
    the gap if necessary. 10. Repeat Steps 7 and 8 and readjust the gap if necessary. 11. Set the form thickness lever to suit the paper thickness you are using. 12. Install the ribbon cartridge and paper. 13. Install the ribbon access cover. 14. Run the self test and check the density of the printing
  • Lexmark 2391 | Service Manual - Page 79
    mechanical part which affects the operation of the main logic board or the carrier, perform the following procedure to adjust the bidirectional print. Note: This adjustment cannot be completed if the printer runs out of paper, so be sure to use continuous forms. 1. Be sure the ribbon cartridge and
  • Lexmark 2391 | Service Manual - Page 80
    7. Align the second and fourth lines to the first and third lines. Each time Micro↑ is pressed, the second and fourth lines shift toward the left. Each time Micro ↓ is pressed, the second and fourth lines shift toward the right. 8. Continue adjusting the bidirectional alignment by repeating step 7,
  • Lexmark 2391 | Service Manual - Page 81
    to remove and replace individual FRUs. The procedures in this section are mainly for the 2380 and 2390 printers. When a procedure for the 2381 and 2391 printers differ, the procedure for the 2381 and 2391 is described under "Wide Carriage". CAUTION: Be sure to unplug the power cord whenever you are
  • Lexmark 2391 | Service Manual - Page 82
    Auto Sheet Feeder Gears Removal 1. Remove the right cover. 2. Release the latch [A], and then remove the joint gear [1]. 3. Remove the idler gear [2]. 4. Release the latch [A], and then remove the idler gear [3]. 5. Release the latch [8], and then remove the pick-up gear [4]. 6. Release the latch
  • Lexmark 2391 | Service Manual - Page 83
    Auto Sheet Feeder Pick-up Roller Removal 1. Remove the covers and the cut sheet support. 2. Remove the idler gear and pick-up gear see "Auto Sheet Feeder Gears Removal" on page 4-8. 3. Remove the left roller bushing [1] as shown. 4. Remove the
  • Lexmark 2391 | Service Manual - Page 84
    see "Print Unit Removal" on page 4-47. 6. Remove the rubber board support [5]. 7. 2380 & 2390 - Release the two latches [1] and then remove the Main Logic Board ground plate [2] by sliding it toward you. • 2381 & 2391 - Remove the two screws securing the Main Logic Board ground plate [2] to
  • Lexmark 2391 | Service Manual - Page 85
    Repair Information 4-11
  • Lexmark 2391 | Service Manual - Page 86
    Removal" on page 4-59. 5. Remove the paper feed motor and the paper feed motor plate see "Paper Guide / Platen Assembly Removal" on page 4-40. 6. Move the carrier to the center of the printer. 7. Remove the belt tension spring [1] from the hook closest to the tension pulley. 8. Loosen the screw
  • Lexmark 2391 | Service Manual - Page 87
    carrier shaft and forms thickness lever to the left and remove them together from the printer. Do not to lose the gap set collar [15] attached to the right end of the carrier shaft. 14. Lift the rear of the carrier [12] to disengage the carrier ribbon
  • Lexmark 2391 | Service Manual - Page 88
    4-14
  • Lexmark 2391 | Service Manual - Page 89
    This Page Intentionally Blank. Repair Information 4-15
  • Lexmark 2391 | Service Manual - Page 90
    Removal" on page 4-61. 2. Remove the sub logic board see "Sub Logic Board Removal" on page 4-59. 3. Move the carrier to the center of the printer. 4. Remove the belt tension spring [1] and loosen the screw [2]. 5. Remove the carrier belt [3] from the tension pulley and the carrier motor pulley. 4-16
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    6. Disconnect the carrier motor cable [4] from connector CN9 on the main logic board. 7. Remove the screws [5] and [6] and then remove the carrier motor assembly from the left side frame. Repair Information 4-17
  • Lexmark 2391 | Service Manual - Page 92
    motor see "Paper Guide / Platen Assembly 003: Remove the support plate. 13. Remove the lower pinch roller see "Lower Pinch Roller Removal" on page 4-32. 14. Remove the gears on the right side frame see "Right Side Frame Gears Removal" on page 4-58. 15. Remove the ribbon drive rack gear see "Ribbon
  • Lexmark 2391 | Service Manual - Page 93
    Repair Information 4-19
  • Lexmark 2391 | Service Manual - Page 94
    21. Gently bend both side frames outward to release tabs [7] from the slots [8]. Lift and remove the carrier plate. 4-20
  • Lexmark 2391 | Service Manual - Page 95
    Module and the Print Buffer Module are options. 1. Remove the rear cover. 2. Remove the paper support. 3. Insert a small flat screwdriver [1] under each end of the module and lift up gently. (On 23XX-002, 003 printers only one end of the module is accessible.) Do not insert the screwdriver too deep
  • Lexmark 2391 | Service Manual - Page 96
    motor and the paper feed motor plate see "Paper Guide / Platen Assembly Removal" on page 4-40. 4. Remove the lever stop bracket from the carrier motor (bracket not present on all machines). 5. Remove the screw and washer [3]. 6. Release the latch [4] and remove the form thickness lever [5]. 4-22
  • Lexmark 2391 | Service Manual - Page 97
    the sub logic board see "Sub Logic Board Removal" on page 4-59. 3. Remove the paper feed motor and the paper feed motor plate see "Paper Guide / Platen Assembly Removal" on page 4-40. When the paper feed motor plate is removed, the idler gear [3] may come off simultaneously. 4. Remove the head gap
  • Lexmark 2391 | Service Manual - Page 98
    -002, 003) 1. Remove the top cover see "Top Cover Removal" on page 4-61. 2. Remove the sub logic board see"Sub Logic Board Removal" on page 4-59. 3. Remove the paper feed motor and the paper feed motor plate see "Paper Guide / Platen Assembly Removal" on page 4-40. 4. Move the forms thickness lever
  • Lexmark 2391 | Service Manual - Page 99
    logic board. 3. Remove the screw [1], and then remove the home position sensor from the left side frame. The sensor is attached to the left side support plate on newer models. Repair Information 4-25
  • Lexmark 2391 | Service Manual - Page 100
    strip is damaged, replace the paper separator. If the label is jammed below the carrier plate or on the lower plastic portion of the paper guide/platen assembly, carefully remove the jammed label without scratching either surface or damaging the mylar strips that rest on the lower feed rollers. 4-26
  • Lexmark 2391 | Service Manual - Page 101
    This Page Intentionally Blank. Repair Information 4-27
  • Lexmark 2391 | Service Manual - Page 102
    the paper feed motor and paper feed motor plate see "Paper Guide / Platen Assembly Removal" on page 4-40. 7. Remove the 003 - Remove the screw [8] that was covered by the gear and remove the metal support plate. Remove the platen bar screw [8] that was covered by the support plate. 23XX-001 printers
  • Lexmark 2391 | Service Manual - Page 103
    20. Remove the screw [4]. 21. Release the two latches [5]. 22. Remove the left side frame. 23. Be sure to perform the Printhead-to-Platen Gap Adjustment after you re-assemble the printer. see "Printhead-to-Platen Gap Adjustment" on page 4-2. Repair Information 4-29
  • Lexmark 2391 | Service Manual - Page 104
    Removal" on page 4-48. 6. Remove the sub logic board see "Sub Logic Board Removal" on page 4-59. 7. Remove the paper feed motor see "Paper Guide / Platen Assembly Removal" on page 4-40. 8. Remove the carrier see "Carrier Removal" on page 4-12. 9. Remove the upper feed roller see "Upper Feed Roller
  • Lexmark 2391 | Service Manual - Page 105
    Repair Information 4-31
  • Lexmark 2391 | Service Manual - Page 106
    the carrier to the right as far as it will go. 5. Slide the left end of the lower pinch roller to the front of the printer and lift it up and to the left to remove it. 6. Be sure to perform the Printhead-to-Platen Gap Adjustment procedure see "Printhead-to
  • Lexmark 2391 | Service Manual - Page 107
    Main Logic Board Removal 1. Remove the top cover see "Top Cover Removal" on page 4-61. 2. Disconnect all cables connected to the main logic board connectors may not be exactly as shown. Note: Do not twist the flexible cable when disconnecting CN3. 3. Remove the two screws [1] and then remove the
  • Lexmark 2391 | Service Manual - Page 108
    Operator Panel Assembly Removal 1. Remove the top cover see "Top Cover Removal" on page 4-61. 2. Release the two latches [1], and then remove the operator panel assembly. Note: Be sure the flexible cable is correctly aligned and inserted securely. The end with the 90 degree fold connects to the sub
  • Lexmark 2391 | Service Manual - Page 109
    This Page Intentionally Blank. Repair Information 4-35
  • Lexmark 2391 | Service Manual - Page 110
    sensor. Carefully remove the paper empty sensor cable to avoid cable damage. 6. Disconnect the paper empty sensor cable from the latch on the paper guide. 7. Carefully grasp the paper empty lever at [2] with a pair of needle nose pliers and remove the paper empty lever by pulling it perpendicular
  • Lexmark 2391 | Service Manual - Page 111
    Repair Information 4-37
  • Lexmark 2391 | Service Manual - Page 112
    Paper Feed Motor Removal 1. Remove the top cover see "Top Cover Removal" on page 4-61. 2. Remove the sub logic board see "Sub Logic Board Removal" on page 4-59. 3. Disconnect the paper feed motor cable [1] from connector CN10 on the main logic board. 4. Remove the screw [3]. 5. Rotate the paper feed
  • Lexmark 2391 | Service Manual - Page 113
    Paper Guide Removal (Left And Right) 1. Remove the front cover and place it front down on a flat surface. 2. Press down the paper guide [1], release the two latches, and remove the paper guide. Repair Information 4-39
  • Lexmark 2391 | Service Manual - Page 114
    -002, 003 - Remove the rear support plate mounting screw that was covered by the gear. Remove the metal support plate mounting screw and the support plate. . 17. Release the two latches [1] on the left side of the paper guide [2], and then remove the assembly from the left side frame. 18. Perform
  • Lexmark 2391 | Service Manual - Page 115
    Repair Information 4-41
  • Lexmark 2391 | Service Manual - Page 116
    Paper Select Lever Removal 1. Remove the top cover see "Top Cover Removal" on page 4-61. 2. Release the latch [2] and then remove the paper select lever [1] from the right side frame. 4-42
  • Lexmark 2391 | Service Manual - Page 117
    Using diagonal pliers, cut 4 mm off the ends of the last two ribs on the paper guide to allow better screwdriver access. If necessary, also remove the molded hook on the paper guide. 4. Use a #1 Phillips screwdriver to remove the screw [1] and the sensor [2]. Disconnect the sensor connector from the
  • Lexmark 2391 | Service Manual - Page 118
    4-47. 4. Remove the carrier shaft retention ground spring [1] located on the right side frame. 5. Position the paper select lever in the continuous forms position (down). 6. Remove the two spring-loaded gears from the right side frame see "Right Side Frame Gears Removal" on page 4-58. 7. Release
  • Lexmark 2391 | Service Manual - Page 119
    Repair Information 4-45
  • Lexmark 2391 | Service Manual - Page 120
    Power Supply Removal CAUTION: The power supply may be hot. 1. Turn off the printer and disconnect the power cord at both ends. 2. Remove the top cover see "Top Cover . The ground spring on top of the power supply goes behind the frame support shaft and in front of the upper feed roller shaft. 4-46
  • Lexmark 2391 | Service Manual - Page 121
    Print Unit Removal 1. Remove the tractor assembly see "Push Tractor Assembly Removal" on page 4-53. 2. Remove the top cover see "Top Cover Removal" on page 4-61. 3. Disconnect all cables connected to the main logic board. Do not bend or twist the flexible cable when disconnecting it from CN3. 4.
  • Lexmark 2391 | Service Manual - Page 122
    moving the carrier. • Firmly grip the latch for the ribbon cartridge to move the carrier. 3. Before you remove the printhead, set the form thickness lever to position 7. 4. Remove the ribbon access cover. 5. Remove the ribbon cartridge. 6. Release the two latches [1] and then lift the printhead
  • Lexmark 2391 | Service Manual - Page 123
    Printhead Cables Removal Note: Be careful not to damage the printhead cables as they are secured with double-sided adhesive tape. 1. Remove the top cover see "Top Cover Removal" on page 4-61. 2. Remove the printhead see "Printhead Removal" on page 4-48. 3. Release the printhead cables from the
  • Lexmark 2391 | Service Manual - Page 124
    Pull Tractor Removal 1. Press the tractor assembly locking levers [1] down, tilt the tractor assembly in the direction indicated by the arrow and remove it from the printer. 4-50
  • Lexmark 2391 | Service Manual - Page 125
    pull tractor actuator [1]. 4. Remove the right pull tractor actuator [2]. Note: If the pull tractor actuator is difficult to remove or is accidentally dropped inside the printer, remove the top cover. Repair Information 4-51
  • Lexmark 2391 | Service Manual - Page 126
    Pull Tractor Sensor Removal 1. Remove the top cover see "Top Cover Removal" on page 4-61. 2. Disconnect the pull tractor sensor cable from connector CN4 on the main logic board. 3. Use a #1 Phillips screwdriver, held in the position shown, to remove the screw, then remove the pull tractor sensor. 4-
  • Lexmark 2391 | Service Manual - Page 127
    Push Tractor Assembly Removal 1. Open the front cover [1]. 2. Press both tractor assembly locking levers [2] down, then pull the tractor assembly [3] straight out of the printer. Repair Information 4-53
  • Lexmark 2391 | Service Manual - Page 128
    Ribbon Drive Rack Gear Removal 1. Remove the top cover see "Top Cover Removal" on page 4-61. 2. Move the forms thickness lever to position 1. 3. Position the carrier midway between the two rack mounting tabs [1] shown. 4. Remove the stop [2], if present. 5. Release the snap [3] and move
  • Lexmark 2391 | Service Manual - Page 129
    This Page Intentionally Blank. Repair Information 4-55
  • Lexmark 2391 | Service Manual - Page 130
    paper feed motor plate see "Paper Guide / Platen Assembly Removal" on page 4-40 leg from the right side of the printer. 7. Remove the print unit see the latch on the forms thickness lever and slide the 23XX-002, 003 - Remove the screw [5] holding the right side frame to the support shaft [7].
  • Lexmark 2391 | Service Manual - Page 131
    Notes On Replacement: • Take care not to break the two latches [6] on the side frame that latch to the paper guide. • Be sure both ends of the paper separator are correctly in the mounting holes. • Use the new slider cam, if one is included with the
  • Lexmark 2391 | Service Manual - Page 132
    the top cover see "Top Cover Removal" on page 4-61. 2. Set the paper select lever upward to the cut form position. 3. Release the latch [1] and then remove the ASF drive gear. 4. 23XX-003: Remove the two screws and remove the shaft support plate (not shown). 5. Remove both E rings [2],[3] and then
  • Lexmark 2391 | Service Manual - Page 133
    , first connect the short flexible cable to the sub logic board at CN2. The contact side of the cable must face the center of the printer. Repair Information 4-59
  • Lexmark 2391 | Service Manual - Page 134
    Tension Pulley Plate Assembly 1. Remove the top cover see "Top Cover Removal" on page 4-61. 2. Remove the belt tension spring [1] from the hook. 3. Remove the screw [2]. 4. Remove the carrier belt [3]. 5. Remove the tension pulley plate assembly [4] by sliding it toward the right (rear view). 4-60
  • Lexmark 2391 | Service Manual - Page 135
    4-50. 5. Remove the front cover [2] and the ribbon access cover [3]. 6. Release the two latches [9], and then remove the rear cover [3]. 7. Set the paper select lever [4] to the cut sheet position. 8. Remove the two screws [8]. 9. Stand the printer on its side. Insert a flat blade screwdriver into
  • Lexmark 2391 | Service Manual - Page 136
    Note: The 2381 and 2391 have six cover latches that secure the top cover to the bottom cover. 10.While lifting WARNING: Damage to the operator panel cable may cause failure of other electrical components of the printer. Be sure not to crimp or pinch this cable while reinstalling the top cover. 4-62
  • Lexmark 2391 | Service Manual - Page 137
    This Page Intentionally Blank. Repair Information 4-63
  • Lexmark 2391 | Service Manual - Page 138
    Top of Form Sensor, Sensor Flag And Spring Removal 1. Remove the tractor assembly see "Push Tractor Assembly Removal" on page 4-53. 2. Remove the top cover see "Top Cover
  • Lexmark 2391 | Service Manual - Page 139
    sensor. 1. With diagonal pliers, cut the post and two tabs [5] off as flush as possible. 2. Unsnap both ends of the sensor flag from the paper guide. Carefully remove the sensor flag spring [4] from the bottom end of the sensor flag. 3. Pivot the upper tip of the sensor flag downward through the
  • Lexmark 2391 | Service Manual - Page 140
    Upper Feed Roller Removal 1. Remove the top cover see "Top Cover Removal" on page 4-61. 2. Disconnect the power supply cable from CN1 on the sub logic board. Remove the self-tapping screw that holds the sub logic board and the paper feed motor plate to the left side frame. 3. Remove the tractor
  • Lexmark 2391 | Service Manual - Page 141
    parts of the printer. Reference A B C D E F G H I J K L M N O P Q R S T U V W Part Name Form Thickness Lever Paper Select Lever Carrier Motor Paper Feed Motor Parallel Interface Connector Main Logic Board Sub Logic Board Power Supply Tractor Unit Pull Tractor Actuator Ribbon Cartridge Ribbon
  • Lexmark 2391 | Service Manual - Page 142
    Front View 5-2
  • Lexmark 2391 | Service Manual - Page 143
    Rear View Connector Locations 5-3
  • Lexmark 2391 | Service Manual - Page 144
    -4 CN1-5 CN1-6 CN1-7 CN1-8 CN1-9 CN1-10 CN1-11 CN1-12 CN1-13 Mode +26 V dc. + 26 V dc. Frame GND. Not Used. +5 V dc. Motor Common. D-Set (Signal for Tractor 2 Plugged in). Signal GND. Motor Phase A; 0 V dc except when Tractor 2 motor is on. Motor Phase B; +5 V dc when Tractor 2 not in use; 0 V dc
  • Lexmark 2391 | Service Manual - Page 145
    Wiring Diagrams Block Diagram 238X-001 Connector Locations 5-5
  • Lexmark 2391 | Service Manual - Page 146
    Block Diagram 239X-001 5-6
  • Lexmark 2391 | Service Manual - Page 147
    Block Diagram 238X-002 Connector Locations 5-7
  • Lexmark 2391 | Service Manual - Page 148
    Block Diagram 239X-002 5-8
  • Lexmark 2391 | Service Manual - Page 149
    Block Diagram 238X-003 Connector Locations 5-9
  • Lexmark 2391 | Service Manual - Page 150
    Block Diagram 239X-003 5-10
  • Lexmark 2391 | Service Manual - Page 151
    Signal Connections Power Supply Main Logic Board Sub Logic Board Power Supply Main Logic Board Sub Logic Board Pin 1 Pin 2 Pin 3 Pin 4 CN1 SIGNAL GND +5 V POWER GND +26 V CN11 Pin 4 Pin 3 Pin 2 Pin 1 SIGNAL GND +5 V POWER GND +26 V Pin 4 Pin 3 Pin 2 Pin 1 CN1 SIGNAL GND +5 V
  • Lexmark 2391 | Service Manual - Page 152
    Main Logic Board Parallel Interface Cable Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Pin 10 Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 Pin 16 Pin 17 Pin 18 Pin 19 Pin 20 Pin 21 Pin 22 Pin 23 Pin 24 Pin 25 Pin 26 Pin 27 Pin 28 Pin 29 Pin 30 Pin 31 Pin 32 Pin 33 Pin 34 Pin 35 Pin 36 -STROBE
  • Lexmark 2391 | Service Manual - Page 153
    Main Logic Board Sub Logic Board (Model - 001) 23XX-001 Main Logic Board CN3 Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Pin 10 Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 Pin 16 Pin 17 Pin 18 Pin 19 Pin 20 Pin 21 Pin 22 Pin 23 Pin 24 Pin 25 Pin 26 Pin 27 Pin 28 Pin 29 Pin 30 Pin 31 Pin 32
  • Lexmark 2391 | Service Manual - Page 154
    HD17 HD18 HD16 HD14 HD12 HD10 HD21 MSW HDCOM HD19 HD23 HD24 HD22 HD20 238X-002, 003 Sub Logic Board CN2 Pin 28 Pin 27 Pin 26 Pin 25 Pin 24 Pin 23 Pin HD5 HD7 HD9 HD11 HD13 HD15 HD17 HD18 HD16 HD14 HD12 HD10 HD21 MSW 239X-002, 003 Sub Logic Board CN2 Pin 34 Pin 33 Pin 32 Pin 31 Pin 30 Pin 29
  • Lexmark 2391 | Service Manual - Page 155
    (option) Pin 1 Pin 2 CN5 +5 V SIGNAL GND Main Logic Board Paper Empty Sensor Pin 1 Pin 2 Pin 3 CN7 PE1P PE1 SIGNAL GND Main Logic Board Top of Form Sensor (23XX-002) Pin 1 Pin 2 Pin 3 CN8 TOFP TOF SIGNAL GND Connector Locations 5-15
  • Lexmark 2391 | Service Manual - Page 156
    CACOMA Main Logic Board Paper Feed Motor Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 CN10 LFD LFC LFB LFA LFCOMB LFCOMA (Not used on Model 003) (Not Used) Sub Logic Board (238X-001) Head Gap Sensor Pin 1 Pin 2 CN3 Aid Port Gap 5-16
  • Lexmark 2391 | Service Manual - Page 157
    Head Gap Pos 1 to 2 Pin 1 Pin 2 CN3 SIGNAL GND GS2 Sub Logic Board (238X-002, 003) Head Gap Pos 3 to 4 Pin 1 Pin 2 CN4 +5 V GS1 Sub Logic Board Paper Select Sensor Pin 1 Pin 2 CN5 F/T SIGNAL GND Sub Logic Board Home Position Sensor
  • Lexmark 2391 | Service Manual - Page 158
    7 Pin 6 Pin 5 Pin 4 Pin 3 Pin 2 Pin 1 SIGNAL GND SIGNAL GND +5 V LEDD SW LTCH SWD SIGNAL GND SCLK +5 V Sub Logic Board Operator Panel (23XX-002, 003) Sub Logic Board Operator Panel CN7(239X) CN8(238X) CN1 Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Pin 10 SIGNAL GND SIGNAL GND
  • Lexmark 2391 | Service Manual - Page 159
    Sub Logic Board (238X) Printhead CN3 Printhead Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Pin 10 Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 Pin 16 Pin 17 Pin 18 HDU6 HDU8 HDD4 HDD2 HDD6 HDU2 HDU4 HDD8 HDD9 HDU1 HDD5 HDD1 HDD7 HDD3 HDU5 HDU9 HDU3 HDU7 Sub Logic Board (239X)
  • Lexmark 2391 | Service Manual - Page 160
    Connector Locations Main Logic Board 23XX-001 5-20
  • Lexmark 2391 | Service Manual - Page 161
    Main Logic Board 23XX-002 Connector Locations 5-21
  • Lexmark 2391 | Service Manual - Page 162
    Main Logic Board 23XX-003 5-22
  • Lexmark 2391 | Service Manual - Page 163
    Sub Logic Boards Connector Locations 5-23
  • Lexmark 2391 | Service Manual - Page 164
    5-24
  • Lexmark 2391 | Service Manual - Page 165
    Power Supply Connector Locations 5-25
  • Lexmark 2391 | Service Manual - Page 166
    Operator Panel 5-26
  • Lexmark 2391 | Service Manual - Page 167
    Maintenance This chapter describes procedures for printer preventive maintenance. Following these recommendations can help prevent problems and maintain optimum performance. Lubrication Warning: Petroleum-based lubricants can attack polycarbonate parts causing premature failure. Use only mineral
  • Lexmark 2391 | Service Manual - Page 168
    Lubrication Points Oil Lubricate the following contact positions: • Oil Felt (carrier block) • Tractor Shaft Grease • Lubricate the following contact positions: • Side Frame (Left) and Pull Tractor Idler Gear • Side Frame (Left) and Gear B • Side Frame (Left) and Idler Gear • Side Frame (Right) and
  • Lexmark 2391 | Service Manual - Page 169
    Lubrication Points (Oil) The oil felt [1] in the carrier block. The tractor shaft [1]. Preventive Maintenance 6-3
  • Lexmark 2391 | Service Manual - Page 170
    Lubrication Points (Grease) Gear mounting studs on the right side frame [2]. The lower pinch roller [2]. 6-4
  • Lexmark 2391 | Service Manual - Page 171
    Lubrication Points (Grease) Continued Gear mounting studs on the left side frame [2]. Preventive Maintenance 6-5
  • Lexmark 2391 | Service Manual - Page 172
    Lubrication Points (Grease) Continued Gear mounting studs on the left ASF side frame [2]. Gear mounting studs on the right ASF side frame [2]. 6-6
  • Lexmark 2391 | Service Manual - Page 173
    Units column indicates that the quantity is not the same for all machines. • NP: (Non-Procurable) in the Units column indicates that the part is non-procurable and that the individual parts or the next higher assembly should be ordered. • NR: (Not Recommended) in the Units column indicates that the
  • Lexmark 2391 | Service Manual - Page 174
    Assembly 1: Major Components 7-2
  • Lexmark 2391 | Service Manual - Page 175
    4 4 4 4 4 4 5 5 5 5 5 5 6 6 Part Number 79F4784 79F4757 1339519 1339520 1339525 1339524 1339521 1339523 1339522 1339518 1339517 79F4791 79F4827 Tractor Unit (2381-001 & 2391-001) Tractor Unit (2380-002, 003 2390-002, 003) Tractor Unit (2381-002, 003 2391-002, 003) Operator Panel Overlay Pack (238X
  • Lexmark 2391 | Service Manual - Page 176
    Assembly 1: Major Components (Continued) 7-4
  • Lexmark 2391 | Service Manual - Page 177
    Kit (239X-001, 002) Gear and Bushing Kit (238X-003) Gear and Bushing Kit (239X-003) Side Frame Locking Plates Screw, Washer & Clip Kit (23XX-001) Screw, Washer & Clip Kit (23XX-002) Screw, Washer & Clip Kit (23XX-003) Tractor Paper Support (2381 & 2391) Serial Interface Adapter Parts Catalog 7-5
  • Lexmark 2391 | Service Manual - Page 178
    Assembly 2: Covers 7-6
  • Lexmark 2391 | Service Manual - Page 179
    Cover Unit (2380-002, 003 & 2390-002, 003) Front Cover Unit (2381-002, 003 & 2391-002, 003) L. H. Paper Guide (23XX-001) L. H. Paper Guide (23XX-002, 003) Front Guide Cover (2380 & 2390) Front Guide Cover (2381 & 2391) R. H. Paper Guide (23XX-001) R. H. Paper Guide (23XX-002, 003) Parts Catalog 7-7
  • Lexmark 2391 | Service Manual - Page 180
    Assembly 2: Covers (Continued) 7-8
  • Lexmark 2391 | Service Manual - Page 181
    10 1333165 Right Extended Paper Guide (Option) (23XX-002, 003) 11 1180862 Center Extended Paper Guide (Option) (23XX-001) 11 1333166 Center Extended Paper Guide (Option) (23XX-002, 003) 12 1332972 Acoustics Kit (Option) (2380 & 2390) 12 1332973 Acoustics Kit (Option) (2381 & 2391) Parts Catalog 7-9
  • Lexmark 2391 | Service Manual - Page 182
    Assembly 3: Carrier 7-10
  • Lexmark 2391 | Service Manual - Page 183
    4 5 5 6 6 7 7 7 7 7 8 8 8 8 Part Number 79F4796 79F4820 79F4848 79F4861 1333195 1333196 1333197 1333198 1333234 79F4792 79F4818 1333220 79F4793 (2391-001) Carrier Unit (2380-002, 003) Carrier Unit (2381-002, 003) Carrier Unit (2390-002, 003) Carrier Unit (2391-002, 003) Carrier Roller Set
  • Lexmark 2391 | Service Manual - Page 184
    Assembly 3: Carrier (Continued) 7-12
  • Lexmark 2391 | Service Manual - Page 185
    , 003) ESD Kit (239X-002, 003) Feed Motor Plate Release Slider Cam (23XX-001, 23XX-002) Release Slider Cam (23XX-003) Sub Slider Cam (23XX-003) Head Gap Sensor (238X-001) Head Gap Sensor Assembly (23XX-002, 003) Support Plate, left side (23XX-002, 003) Shaft Support Plate (23XX-003) Parts Catalog
  • Lexmark 2391 | Service Manual - Page 186
    Assembly 4: Paper Guide / Platen / Feed Roller 7-14
  • Lexmark 2391 | Service Manual - Page 187
    (Right) (23XX-003) Ribbon Drive Rack Gear (2380 & 2390) Ribbon Drive Rack Gear (2381 & 2391) Carrier Plate (2380 & 2390) Carrier Plate (2381 & 2391) Feed Roller (Lower) (2380 & 2390) Feed Roller (Lower) (2381 & 2391) Paper Separator (2380 & 2390) Paper Separator (2381 & 2391) Label Guide Bar (2380
  • Lexmark 2391 | Service Manual - Page 188
    Assembly 4: Paper Guide / Platen / Feed Roller (Cont.) 7-16
  • Lexmark 2391 | Service Manual - Page 189
    -001, 002) Idler Gear (239X-001, 002) Idler Gear (238X-003) Idler Gear (239X-003) Frame Support Shaft (2380-002, 003 2390-002, 003) Frame Support Shaft (2381-002, 003 2391-002, 003) Top of Form Sensor (2380-002, 003 2390-002, 003) Top of Form Sensor (2381-002, 003 2391-002, 003) Parts Catalog 7-17
  • Lexmark 2391 | Service Manual - Page 190
    Assembly 5: Electronics 7-18
  • Lexmark 2391 | Service Manual - Page 191
    3 3 3 4 4 4 4 4 4 4 4 4 4 Part Number 79F4755 1333242 79F4756 1333243 1368071 1333268 1333269 79F4815 79F4850 79F4776 79F5217 79F4777 LV) Base (2390-001 HV) Base (2391-001 LV) Base (2391-001 HV) Base (2380-002, 003 2390-002, 003) Base (2381-002, 003 2391-002, 003) Base (2390 PS/1) Main Logic Board
  • Lexmark 2391 | Service Manual - Page 192
    Assembly 5: Electronics (Continued) 7-20
  • Lexmark 2391 | Service Manual - Page 193
    Board W/O EPROM (2381-003 LV) Main Logic Board W/O EPROM (2381-003 HV) Main Logic Board W/O EPROM (2390-003 LV) Main Logic Board W/O EPROM (2390-003 HV) Main Logic Board W/O EPROM (2391-003 LV) Main Logic Board W/O EPROM (2391-003 HV) EPROM Kit (238X-003) EPROM Kit (239X-003) Parts Catalog 7-21
  • Lexmark 2391 | Service Manual - Page 194
    Assembly 5: Electronics (Continued) 7-22
  • Lexmark 2391 | Service Manual - Page 195
    -003) Screw, Washer, and Clip Kit (23XX-001) Screw, Washer, and Clip Kit (23XX-002) Screw, Washer, and Clip Kit (23XX-003) Spring Kit (23XX-001, 2381-002, 2391-002) Spring Kit (2380-002 & 2390-002) Spring Kit (2380-003 & 2390-003) Spring Kit (2381-003 & 2391-003) Rubber Board Support Parts Catalog
  • Lexmark 2391 | Service Manual - Page 196
    Assembly 6: ASF - Roller / Support 7-24
  • Lexmark 2391 | Service Manual - Page 197
    1333162 95F6891 95F6881 95F6892 95F6893 95F6894 95F6898 Description Paper Guide(23XX-001,002, 2380-003, 2390-003) Cut Sheet Support (2380 & 2390) Cut Sheet Support (2381-001, 002 & 2391-001,002) Cut Sheet Support W/ Guides (2381-003, 2391-003) Feed Roller Upper (2380 & 2390) Feed Roller Upper (2381
  • Lexmark 2391 | Service Manual - Page 198
    Assembly 7: ASF - Side Frame / Covers 7-26
  • Lexmark 2391 | Service Manual - Page 199
    AsmIndex 7 -1 2 3 4 5 6 7 7 Part Number 95F6893 95F6892 95F6882 95F6894 95F6899 95F6901 95F6902 95F6903 Description Spring Kit, ASF Gear and Bushing Kit, ASF Cover (R) Screw Kit, ASF Side Frame (R) Stacking Support Front Cover (2380 & 2390) Front Cover (2381 & 2391) Parts Catalog 7-27
  • Lexmark 2391 | Service Manual - Page 200
    Assembly 8:Tractor 2 Option 7-28
  • Lexmark 2391 | Service Manual - Page 201
    Table W/ Guides, Wide Tractor Paper Guide Tractor and Frame Asm, Narrow Tractor and Frame Asm, Wide Tractor Kit (L & R) Board Asm W/Cable and Ferrite, Narrow Board Asm W/Cable and Ferrite, Wide Motor Parts Packet Right Cover Front Cover, Narrow Front Cover, Wide Support Shaft, Narrow Support Shaft
  • Lexmark 2391 | Service Manual - Page 202
    7-30
  • Lexmark 2391 | Service Manual - Page 203
    Support 7-26 Carrier 7-10 Covers 7-6, 7-8 Electronics 7-20 Feed Roller 7-16 Paper Guide 7-16 Platen 7-16 Tractor 2 Option 7-30 Parts 4-53 Ribbon Drive Form Sensor 4-64 Top of Form Sensor Flag 4-64 Top of Form Spring 4-64 Upper Feed Roller 4-66 S Serial Interface Adapters 1-7 Switches 1-8 Service Checks
  • Lexmark 2391 | Service Manual - Page 204
    Sensor 2-38 Ribbon Feed 2-17 Top of Forms Problem 2-39 Tractor 2 2-40 Setup Mode 1-6 Symptom Checks Abnormal Indications 2-6 Abnormal Noise Problems 2-6 Abnormal Print Problems 2-7 ASF Problems 2-7 Error Indications 2-8 Operator Panel Problems 2-10 Paper Feed Problems 2-8 Power Problems 2-10 Print
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23XX-XXX
Lexmark 23XX Series
Lexmark and Lexmark with diamond
design are trademarks of Lexmark
International, Inc., registered in the
United States and/or other countries.
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