Lexmark X73 4402-001 Service Manual
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Lexmark X73 4402-001 Service Manual

Lexmark X73 4402-001 Service Manual

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Lexmark X73 Scan/Print/Copy
4402-001
• Table of Contents
• Start Diagnostics
• Safety and Notices
• Trademarks
• Index
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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Summary of Contents for Lexmark X73 4402-001

  • Page 1 Lexmark X73 Scan/Print/Copy 4402-001 • Table of Contents • Start Diagnostics • Safety and Notices • Trademarks • Index Lexmark and Lexmark with diamond design are trademarks of Lexmark International, Inc., registered in the United States and/or other countries.
  • Page 2 You can purchase additional copies of publications related to this product by calling 1-800-553-9727. In other countries, contact your point of purchase. Lexmark is a trademark of Lexmark International, Inc., registered in the United States and/or other countries.

  • Page 3: Table Of Contents

    4402-001 Table of Contents Safety Information........v Preface .
  • Page 4 4402-001 Removal Procedures ........4-2 Releasing Plastic Latches .

  • Page 5: Safety Information

    This product is designed, tested and approved to meet strict global safety standards with the use of specific Lexmark components. The safety features of some parts may not always be obvious. Lexmark is not responsible for the use of other replacement parts. •...
  • Page 6 Il prodotto è stato progettato, testato e approvato in conformità a severi standard di sicurezza e per l’utilizzo con componenti Lexmark specifici. Le caratteristiche di sicurezza di alcune parti non sempre sono di immediata comprensione. Lexmark non è responsabile per l’utilizzo di parti di ricambio di altri produttori.
  • Page 7 Lexmark. Puede que las características de seguridad de algunas piezas no sean siempre evidentes. Lexmark no se hace responsable del uso de otras piezas de recambio. •...
  • Page 8 Lexmark. Les característiques de seguretat d'algunes peces pot ser que no sempre siguin òbvies. Lexmark no es responsabilitza de l'us d'altres peces de recanvi. • La informació pel manteniment d’aquest producte està...
  • Page 9 4402-001 Safety Information...

  • Page 10: Preface

    4402-001 Preface This manual describes the Lexmark X73 Scan/Print/Copy (4402- 001) and contains maintenance procedures for service personnel only. It is divided into the following chapters: 1. General Information contains a general description of the printer and the maintenance approach used to repair it. Special tools and test equipment are listed in this chapter, as well as general environmental and safety instructions.

  • Page 11: General Information

    4402-001 1. General Information The Lexmark X73 machine is an electro-mechanical scanner, printer, and copier that creates characters and graphics by composing programmed patterns of ink dots using a printhead and liquid ink. The printhead uses small heater plates and nozzles to control ink flow and the formation of characters on the print media.

  • Page 12: Scanner Specifications

    4402-001 Scanner Specifications Scanner Type Scan Modes Scan Method Scan Area Scan Resolution Service Manual Flatbed, CCD True Color: 48 Bit Internal (68.7 Billion Colors) 24 Bit External (16.7 Million Colors) Gray Mode: 12 Bits Internal (4,096 Shades of Gray) 8 Bits External (256 Shades of Gray) Text/Line Art: 1 Bit Per Pixel...

  • Page 13: Operator Panel

    4402-001 Operator Panel Press this When you want to: button: Setup Adjust your copy and scan settings using the Scan & Copy Control Program on your computer. Color Copy Make a color copy. Black Copy Make a black and white copy. Scan Press the scan button after selecting a Scan To destination.

  • Page 14: Maintenance Approach

    4402-001 Maintenance Approach The diagnostic information in this manual leads you to the correct field replaceable unit (FRU) or part. Use the symptom index, service checks, and diagnostic aids to determine the symptom and repair the failure. After you complete the repair, perform tests as needed to verify the repair.

  • Page 15: Diagnostic Information

    4402-001 2. Diagnostic Information Start Use the symptom tables, service checks, and diagnostic aids in chapter three, to determine the printer failure. Power-On Self Test (POST) Sequence Press the power button to turn machine on. • Power light turns on. •...

  • Page 16: Post Symptom Table

    4402-001 POST Symptom Table Symptom Action No Power or Go to the Status lights and go to the no motors run. Paper feed Go to the gears do not turn Carrier does not Go to the move page Carrier slams Go to the side frame page...

  • Page 17: Symptom Tables

    4402-001 Symptom Tables Locate the symptom in the following tables and take the appropriate action. Carrier Transport Problems Symptom • No carrier movement • Slow carrier movement • Carrier stops • Carrier slams side frame Maintenance Station Problems Symptom Maintenance station: •...

  • Page 18: Test Page

    4402-001 Printer Communication Table Symptom • Not able to print Test Page Scanner Problems Symptom • CCD does not move • Lamp does not light • Scanned images are faded, or colors are dull, blurry or fuzzy. Images are slanted or crooked and the straight lines in the image appear to be jagged or uneven.
  • Page 19 4402-001 Paper Feed Problems Symptom • Fails to pick paper • Picks more than one sheet of paper • Picks paper but fails to feed • Paper jams • Paper fails to exit • Noisy paper feed Envelopes fail to feed Paper skews Power Problems Symptom...

  • Page 20: Service Checks

    4402-001 Service Checks Carrier Transport Service Check System Board Carrier Transport Motor Carrier Transport Motor Carrier Guide Rod Service Manual Action Check the transport carrier motor connector J4. If connected, check for approximately 28 volts on pins 1 and 2 or at the wire connections located on the rear of the transport carrier motor.
  • Page 21 4402-001 Encoder Strip Carrier with PCB Assembly Carrier Transport Belt Idler Pulley Parts Carrier Frame Printhead Carrier Assembly Maintenance Station Access Cover Sensor Action Check the encoder strip for proper installation. Also, check it for wear, dirt and grease. Be sure all printhead connectors are fully seated. Check the cables for damage.

  • Page 22: Ccd Module Assembly Service Check

    Check” on page 2-9. Note: If the printer is not connected to the PC and Lexmark Scan and Copy Control program is not opened, the CCP lamp will not come on. If lamp does not come on as CCD module assembly is scanning or moving, check connector (J7) on the system board.

  • Page 23: Gear Train Assembly Service Check

    4402-001 Gear Train Assembly Service Check CCD will not move or scan. Gear Train Assembly Scanner Belt Action Disconnect J5 and check the reading at pin 1 and 3 for approximately 225.5 ohms. If the reading is incorrect, replace the gear train assembly.

  • Page 24: Maintenance Station Service Check

    4402-001 Maintenance Station Service Check The maintenance station has three functions: 1. Wipes the printhead nozzles to clean them of dirt. 2. Provides a place for printheads to fire all nozzles, keeping them clear prior to printing. 3. Seals the printhead when it is not being used to prevent the nozzles from drying.

  • Page 25: Paper Feed Service Check

    4402-001 Paper Feed Service Check If your machine does not have paper jam problems, continue with the service check. If your machine does have a paper jam problem, examine it for the following before you begin the service check: • Check the entire paper path for obstructions.
  • Page 26 4402-001 Paper Feed Motor Auto Sheet Feeder Assembly Mid Frame Assembly End-of-Forms Flag and Spring 2-12 Service Manual Action A noisy or chattering motor or a motor that fails to turn, can be caused by: • An open or short in the motor •...

  • Page 27: Paper Path Service Check

    4402-001 Paper Path Service Check Examine the machine for the following before you begin this service check: • Check the entire paper path for obstructions. • Be sure the correct type of paper is being used. • Be sure the printer is installed on a flat surface. Large and Small Feed Rollers Small Feed Roller...

  • Page 28: Power Service Check

    4402-001 Power Service Check External Power Supply Printhead Cable Paper Feed Motor Carrier Transport Motor Operator Panel System Board 2-14 Service Manual Action Plug the external power supply into an outlet. Check for + 30 V dc. If voltage is incorrect, replace the power supply.

  • Page 29: Print Quality Service Check

    4402-001 Print Quality Service Check FRU / Function Printhead Cartridge Color Printhead Cartridge Cross Contamination Printhead Carrier Assembly System Board Printhead Carrier Assembly Maintenance Station Action Be sure the machine contains good print cartridges. Cross contamination of color inks results in incorrect colors printed, as when green prints for yellow, (when yellow and blue are mixed in the printhead cartridge).
  • Page 30 4402-001 FRU / Function Paper Feed Carrier Transport Alignment 2-16 Service Manual Action Ink smudging and smearing can be caused by paper problems or problems in the paper feed area. Check the following: • Correct type of paper is being used. Also check the paper for curl or wrinkles.

  • Page 31: Scan/Copy Quality Service Check

    Check the print cartridges to see if they need to be cleaned or replaced. Check the paper type and copy quality settings on the operator panel or Lexmark Scan and Copy Control program. Diagnostic Information 2-17...
  • Page 32 4402-001 2-18 Service Manual...

  • Page 33: Diagnostic Aids

    4402-001 3. Diagnostic Aids Test Page This test prints the test page. To run a complete test page of black and color patterns, be sure the printhead cartridges are in good condition. To enter the test: 1. Open the access cover. 2.
  • Page 34 4402-001 Service Manual...

  • Page 35: Repair Information

    4402-001 4. Repair Information This chapter explains how to make adjustments to the printer and how to remove defective parts. Note: Read the following before handling electronic parts. Handling ESD-Sensitive Parts Many electronic products use parts that are known to be sensitive to electrostatic discharge (ESD).

  • Page 36: Adjustments

    4402-001 Adjustments The user is directed, in the Printer Control program, to perform the printhead alignment adjustments after replacing a print cartridge. Removal Procedures The following procedures are arranged according to the name of the printer part discussed. CAUTION: Unplug the power cord before removing any parts. Releasing Plastic Latches Many of the parts are held in place with plastic latches.

  • Page 37: Scanner Lid Assembly Removal

    4402-001 Scanner Lid Assembly Removal 1. Open the lid. 2. Lift and remove. Rear Cover Removal 1. Remove two screws [A] from the rear cover. 2. Depress two latches [B] on the bottom of the rear cover. 3. Lift the rear cover and remove Repair Information...

  • Page 38: Operator Panel Removal

    4402-001 Operator Panel Removal 1. Remove the scanner lid. 2. Remove the rear cover. 3. Disconnect the operator panel cable from the system board. 4. Depress two latches on the left side of the operator panel. 5. Lift the operator panel and remove. Top Housing Assembly Removal 1.

  • Page 39: Ccd Module Assembly Removal

    4402-001 CCD Module Assembly Removal 1. Remove the rear cover. 2. Disconnect the CCD cable from the system board. 3. Remove the top housing assembly. 4. Depress the shaft retainer [A]. 5. Lift and remove the shaft. 6. Remove the belt from pulleys. 7.

  • Page 40: Gear Train Assembly Removal

    4402-001 Gear Train Assembly Removal 1. Remove the CCD module assembly. 2. Disconnect the gear train assembly cable from the system board. 3. Remove two screws [A]. 4. Lift and remove the gear train assembly. Access Cover Sensor Removal 1. Remove the top housing assembly. 2.

  • Page 41: Right Cover Removal

    4402-001 Right Cover Removal 1. Remove the rear cover. 2. Depress two latches [A]. 3. Remove the right cover. Access Cover Removal 1. Remove the rear cover. 2. Remove the right cover. 3. Depress the access cover hinge. 4. Remove the access cover. Repair Information...

  • Page 42: Left Cover Removal

    4402-001 Left Cover Removal 1. Remove the rear cover. 2. Depress two latches [A]. 3. Remove the left cover. Service Manual...

  • Page 43: Middle Frame Removal

    4402-001 Middle Frame Removal 1. Remove the scanner lid assembly. 2. Remove the rear cover. 3. Remove the top housing assembly. 4. Disconnect the operator panel and CCD cables from the system board. 5. Remove left and right covers. 6. Remove the operator panel assembly. 7.
  • Page 44 4402-001 8. Depress the two clips [B] and slide the middle frame forward to remove. 4-10 Service Manual...

  • Page 45: Print Engine Removal

    4402-001 Print Engine Removal 1. Remove the rear cover. 2. Remove the top housing assembly. 3. Remove the left cover. 4. Remove the right cover. 5. Remove the middle frame. 6. Move carrier to the center. 7. Remove three screws [B]. 8.

  • Page 46: Asf Module Removal

    4402-001 ASF Module Removal 1. Remove the print engine. 2. Remove three screws [A]. 3. Remove the ASF module. System Board Removal 1. Remove the print engine. 2. Remove the ASF module. 3. Disconnect the transport and paper feed motor cables from the system board.

  • Page 47: Carrier Removal

    4402-001 Carrier Removal 1. Remove the rear cover. 2. Remove the top housing Assembly. 3. Remove the left and right covers. 4. Disconnect the carrier cable from the system board. 5. Loosen the set screw on the carrier belt tensioner. 6.

  • Page 48: Maintenance Station Removal

    4402-001 Maintenance Station Removal 1. Remove the middle frame assembly. 2. Remove the print engine. 3. Depress the two clips [A]. 4. Remove the maintenance station. Belt/Idler Pulley Assembly (Print Engine) Removal 1. Remove the middle frame. 2. Slide the carrier to the left. 3.

  • Page 49: Connector Locations

    4402-001 5. Connector Locations Units Description Printhead Cable Paper Feed Motor Carrier Transport Motor Scanner Motor Operator Panel CCD Module Cover Sensor End-of-Forms Sensor Connector Locations...
  • Page 50 4402-001 Service Manual...

  • Page 51: Preventive Maintenance

    4402-001 6. Preventive Maintenance This chapter contains the lubrication specifications. Follow these recommendations to prevent problems and maintain optimum performance. Lubrication Specifications Lubricate only when parts are replaced or as needed, not on a scheduled basis. Use grease P/N 99A0394 to lubricate the following: •...
  • Page 52 4402-001 Service Manual...

  • Page 53: Parts Catalog

    4402-001 7. Parts Catalog How to Use This Parts Catalog • SIMILAR ASSEMBLIES: If two assemblies contain a majority of identical parts, they are shown on the same list. Common parts are shown by one index number. Parts peculiar to one or the other of the assemblies are listed separately and identified by description.

  • Page 54: Assembly 1: Covers

    4402-001 Assembly 1: Covers Service Manual...
  • Page 55 4402-001 Assembly 1: Covers Asm- Part Index Number 1–1 12G6141 –2 12G6140 –3 12G6138 –4 12G6135 –5 12G6133 –6 12G6175 –7 12G6134 12G6156 7366857 Units Description Cover Assembly, Rear Felt Pad Assembly Base Assembly Cover, Right Cover, Access with Latch Paper Exit Tray Cover, Left Screws (PP)
  • Page 56 4402-001 Assembly 1 (cont.): Covers Service Manual...
  • Page 57 4402-001 Assembly 1 (cont.): Assembly 1: Covers Asm- Part Index Number 1–1 12G6171 –2 12G6174 –3 12G6126 –4 12G6122 –5 12G6150 Covers Units Description Scanner Lid Assembly Paper Support ASF Top Housing Assembly Middle Frame Assembly Belt, Scanner Parts Catalog...

  • Page 58: Assembly 2: Paper Feed, Frame And Carrier Transport

    4402-001 Assembly 2: Paper Feed, Frame and Carrier Transport Service Manual...
  • Page 59 4402-001 Assembly 2: Paper Feed, Frame and Carrier Transport Asm- Part Index Number 2–1 12G6121 –2 12G6120 –3 12G6151 –4 12G6123 –5 12G6149 –6 12G6154 12G6153 Units Description ASF Module Printing Engine Encoder Strip with Clip Idler Pulley Assembly Belt, Carrier Maintenance Station Assembly EOF Flag with Spring Parts Catalog...

  • Page 60: Assembly 3: Electronics

    4402-001 Assembly 3: Electronics Service Manual...
  • Page 61 4402-001 Assembly 3: Electronics 3–1 12G6177 12G6124 12G6176 –2 12G6125 –3 12G6172 12G6173 –4 12G6170 –5 12G6137 –6 12G6128 12G6157 12G6158 CCD Module Assembly with Cable CCD Module Assembly CCD Cable Gear Train Assembly Operator Panel Assembly Operator Panel Overlays Board, System Sensor, Access Cover Power Supply (LV) 100–127...
  • Page 62 4402-001 7-10 Service Manual...
  • Page 63 4402-001 Index Abbreviations Adjustments Black Copy button Button Black Copy Color Copy Paper Feed Power Scan Scan To Scan To E-mail Scan To Fax Setup Color Copy button Connector Locations ESD-Sensitive Parts Lubrication Specifications Maintenance Approach Operator Panel Paper Feed button Parts Catalog Carrier Transport Covers...
  • Page 64 4402-001 Safety Information Scan button Scan To button Scan To E-mail button Scan To Fax button Service Checks Carrier Transport CCD Module Assembly Gear Train Assembly Paper Feed 2-11 Paper Path 2-13 Power 2-14 Print Quality 2-15 Setup Button Specifications Scanner Start Symptom Table (POST)

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