Brother HL-4140CN Service Manual
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Brother HL-4140CN Service Manual

Color laser printer
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Table of Contents

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Brother Color Laser Printer
MODEL: HL-4140CN/4150CDN/
Read this manual thoroughly before maintenance work.
Keep this manual in a convenient place for quick and easy reference at all times.
August 2010
SM-PRN078
84E301
(4)

SERVICE MANUAL

4570CDW/4570CDWT
Confidential

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Summary of Contents for Brother HL-4140CN

  • Page 1: Service Manual

    Brother Color Laser Printer SERVICE MANUAL MODEL: HL-4140CN/4150CDN/ 4570CDW/4570CDWT Read this manual thoroughly before maintenance work. Keep this manual in a convenient place for quick and easy reference at all times. August 2010 SM-PRN078 84E301 Confidential...

  • Page 2: Specifications

    TRADEMARKS The Brother logo is a registered trademark of Brother Industries, Ltd. Apple and Macintosh are trademarks of Apple Inc., registered in the United States and other countries. PCL is either a trademark or a registered trademark of Hewlett-Packard Company in the United States and other countries.

  • Page 3: Table Of Contents

    CONTENTS REGULATION ................... I SAFETY INFORMATION ..............V CHAPTER 1 SPECIFICATIONS 1. SPECIFICATIONS LIST ................1-1 1.1 General ........................1-1 1.2 Network Connectivity ....................1-4 1.3 Service Information..................... 1-5 1.4 Supplies ........................1-6 1.5 Paper .......................... 1-7 1.5.1 Paper handling ....................1-7 1.5.2 Media specifications ..................
  • Page 4 3.4.3 Paper jam ......................2-89 3.4.4 Dirt on paper ....................2-93 3.4.5 Wrinkles on paper.................... 2-93 3.5 Image Defect Troubleshooting.................. 2-94 3.5.1 Image defect examples ................... 2-94 3.5.2 Pitch indicated in roller image................2-95 3.5.3 Troubleshooting image defect ................. 2-95 3.6 Software Setting Problems ..................2-111 3.6.1 Cannot print data ....................2-111 3.7 Network Problems ....................2-111...
  • Page 5 9.8 Duplex Feed ASSY....................3-38 9.9 MP Cover ASSY/MP Paper Guide ASSY ..............3-39 9.10 MP Link L/R ......................3-42 9.11 Front Cover Arm L/R....................3-43 9.12 Front Cover Release Button/Front Cover Release Button Spring ......3-47 9.13 Top Cover ASSY..................... 3-49 9.14 Wireless LAN PCB ....................
  • Page 6 9.47 MP Sector Solenoid....................3-117 9.48 T1 Paper Edge Sensor PCB ASSY/T1 Paper Edge Actuator/ T1 Paper Edge Actuator Spring................3-118 9.49 Cleaner Drive Gear 15..................3-121 9.50 High-voltage Power Supply PCB ASSY ............... 3-122 9.51 Waste Toner Sensor ..................... 3-125 9.52 Air Duct Cover/Blower ..................
  • Page 7 3. IF YOU REPLACE THE HIGH-VOLTAGE POWER SUPPLY PCB ASSY4-7 3.1 Sensitivity Adjustment of Density Sensor (Maintenance Mode: Code 72)....4-7 3.2 Performing the Developing Bias Voltage Correction (Maintenance Mode: Code 83) . 4-7 3.3 Performing the Adjustment of Inter-color Position Alignment (Maintenance Mode: Code 66) ...................
  • Page 8 1.4.18 Sensitivity adjustment of density sensor (Function code 72)......5-35 1.4.19 Setting by country (Function code 74)............5-36 1.4.20 Sensitivity adjustment of registration mark sensor and check of belt unit surface (Function code 75) .............. 5-38 1.4.21 Printout of maintenance information (Function code 77)....... 5-40 1.4.22 Operational check of fans (Function code 78)..........
  • Page 9 APPENDIX 1. SERIAL NUMBERING SYSTEM APPENDIX 2. DELETION OF USER SETTING INFORMATION, ETC. APPENDIX 3. INSTALLING THE MAINTENANCE DRIVER Confidential...

  • Page 10: Regulation

    - choose your model - choose “Manuals” - choose Declaration of Conformity (Select Language when required.) ■ Declaration of Conformity (Europe only) (HL-4140CN/HL-4150CDN only) We, Brother Industries, Ltd. 15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561 Japan declare that this product is in compliance with the essential requirements of Directives 2004/108/EC, 2006/95/EC and 2005/32/EC.
  • Page 11 ■ Disconnect Device This product must be installed near an electrical socket that is easily accessible. In case of emergencies, you must disconnect the power cord from the electrical socket to shut off power completely. ■ Wiring Information (U.K. only) If you need to replace the plug fuse, fit a fuse that is approved by ASTA to BS1362 with the same rating as the original fuse.
  • Page 12 Important A shielded interface cable should be used to ensure compliance with the limits for a Class B digital device. Changes or modifications not expressly approved by Brother Industries, Ltd. could void the user’s authority to operate the equipment. Confidential...
  • Page 13 FDA regulations and must be attached to laser products marketed in the United States. MANUFACTURED: Brother Technology (Shenzhen) Ltd. NO6 Gold Garden Ind., Nanling Buji, Longgang, Shenzhen, China This product complies with FDA performance standards for laser products except for deviations pursuant to Laser Notice No.50, dated June 24, 2007.

  • Page 14: Safety Information

    SAFETY INFORMATION ■ Definitions of Warnings, Cautions, Notes and Memos The following conventions are used in this manual: Mark Contents Warnings tell you what to do to prevent possible personal injury. Electrical Hazard icons alert you to a possible electrical shock. Hot Surface icons warn you not to touch machine parts that are hot.
  • Page 15 ■ Safety Precautions Listed below are the various kinds of “WARNING” messages included in this manual. WARNING There are high voltage electrodes inside the machine. Before you clean the inside of the machine or replace parts, make sure that you have turned off the power switch and unplugged the machine from the AC power outlet.
  • Page 16 WARNING DO NOT touch the shaded parts shown in the illustration. These rollers may be rotating at high speed and can pinch or entrap your hand. Languages on the label may vary depending on your country. DO NOT use flammable substances, any type of spray or any organic solvent/liquids contains alcohol or ammonia to clean the inside or outside of the machine.
  • Page 17 CAUTION Lightning and power surges can damage this product! We recommend that you use a quality surge protection device on the AC power line, or unplug the machine during a lightning storm. Violently closing the front cover without mounting the toner cartridge and the drum unit can damage this product.

  • Page 18: Additional Information

    ■ Caution for Laser Product (WARNHINWEIS fur Laser drucker) CAUTION: When the machine during servicing is operated with the cover open, the regulations of VBG 93 and the performance instructions for VBG 93 are valid. CAUTION: In case of any trouble with the laser unit, replace the laser unit itself. To prevent direct exposure to the laser beam, do not try to open the enclo- sure of the laser unit.

  • Page 19: Chapter 1 Specifications

    CHAPTER 1 SPECIFICATIONS Confidential...
  • Page 20 CHAPTER 1 SPECIFICATIONS This chapter lists the specifications of each model. CONTENTS 1. SPECIFICATIONS LIST ................1-1 1.1 General ........................1-1 1.2 Network Connectivity ....................1-4 1.3 Service Information..................... 1-5 1.4 Supplies ........................1-6 1.5 Paper .......................... 1-7 1.5.1 Paper handling ....................1-7 1.5.2 Media specifications ..................

  • Page 21: Specifications List

    SPECIFICATIONS LIST General Model HL-4140CN HL-4150CDN HL-4570CDW HL-4570CDWT Print method Electrophotographic Laser printer (Single-pass) Resolution 600 x 600 dpi, 2,400 dpi (2400 x 600) quality Print speed One-sided Monochrome & Full Color: Monochrome & Monochrome & Up to 28/30 ppm...
  • Page 22 Model HL-4140CN HL-4150CDN HL-4570CDW HL-4570CDWT Noise level Sound Printing: LpAm = 57 dB (A) pressure Ready: LpAm = 33 dB (A) Sound power Printing (Monochrome): Printing Printing LWAd = 6.71B (A) (Monochrome): (Monochrome): Ready: LWAd = 4.07 B (A) LWAd = LWAd = 6.63B (A)

  • Page 23: Computer Requirements

    <Computer requirements> Supported Processor Hard Disk Computer Platform & Minimum Recommended Minimum Space to Operating System Version Interface Speed install ® ® ® Windows Windows 2000 Intel 64 MB 256 MB 50 MB USB, ® Operating Professional Pentium II or 10Base-T/ System equivalent...

  • Page 24: Network Connectivity

    Network Connectivity Model HL-4140CN HL-4150CDN HL-4570CDW HL-4570CDWT Wired Network node NC-6900h type2 network type Network type 10Base-T/100Base-TX Ethernet Network APOP, POP before SMTP, SMTP-AUTH, security SSL/TLS (IPPS, HTTPS, SMTP, POP), SNMP v3, 802.1x (EAP-MD5, EAP-FAST, PEAP, EAP-TLS, EAP-TTLS), Kerberos Wireless...

  • Page 25: Service Information

    Service Information Model HL-4140CN HL-4150CDN HL-4570CDW HL-4570CDWT Machine life 200,000 pages (A4/Letter) or 5 years MTBF 4,000 hours MTTR 0.5 hours Maximum monthly volume Up to 40,000 pages Up to 60,000 pages Periodical Fuser unit 100,000 pages replacement Laser unit...

  • Page 26: Supplies

    Supplies Model HL-4140CN HL-4150CDN HL-4570CDW HL-4570CDWT Starter Black Toner Approximately 2,500 pages Toner cartridge Cyan, Approximately 1,500 pages Magenta, Yellow Standard Black Approximately 2,500 pages Toner Approximately 1,500 pages Cyan, Magenta, Yellow N/A (for Asia Pacific) High Black N/A (for USA,...

  • Page 27: Paper

    Paper 1.5.1 Paper handling Model HL-4140CN HL-4150CDN HL-4570CDW HL-4570CDWT Paper tray 1 Paper Input 250 sheets Paper tray 2 500 sheets MP tray 50 sheets Paper Face-down 150 sheets Output Face-up 1 sheet (Straight paper path) Duplex Specifications are subject to change without notice.

  • Page 28: Unprintable Area

    Unprintable Area Portrait Landscape ® Windows printer driver and Macintosh printer driver ® BRScript printer driver for Windows and Macintosh 4.23 mm (0.16 inch) 4.23 mm (0.16 inch) Note: The area that cannot be printed on may vary depending on the paper size and the printer driver you are using.

  • Page 29: Chapter 2 Error Indication And Troubleshooting

    CHAPTER 2 ERROR INDICATION AND TROUBLESHOOTING Confidential...
  • Page 30 CHAPTER 2 ERROR INDICATION AND TROUBLESHOOTING This chapter details error messages and codes which the incorporated self-diagnostic function of the printer will display if any error or malfunction occurs. If any error message appears, refer to this chapter to find which parts should be checked or replaced. The latter half of this chapter provides sample problems which could occur in the main sections of the printer and related troubleshooting procedures.
  • Page 31 3.8 Others Problems..................... 2-112 3.8.1 The printer is not turned ON, or the LCD indication does not appear ... 2-112 3.8.2 The fan does not work (Error code 2B, EC) ..........2-112 3.8.3 The USB direct interface does not work (Error code CA, etc) ....... 2-113 3.8.4 The room temperature is high or low.............

  • Page 32: Introduction

    INTRODUCTION Troubleshooting is the countermeasure procedures that the service personnel should follow if an error or malfunction occurs with the printer. It is impossible to anticipate all of the possible troubles which may occur in future and determine the troubleshooting procedures, so this chapter covers some sample troubles.

  • Page 33: Initial Check

    Initial Check Check the following items before attempting to repair the printer. ■ Operating environment (1) Put your printer on a flat, stable surface such as a desk that is free of vibration and shocks. (2) Use the printer in a well-ventilated room; use the printer within the following ranges of temperature and humidity: temperature between 10 °C and 32.5 °C (50 °F to 90.5 °F), and the relative humidity is maintained between 20 % and 80 %.
  • Page 34 ■ Others (1) Condensation When the printer is moved from a cold place into a warm room, condensation may occur inside the printer, causing various problems as listed below. - Condensation on the surface of optical devices such as the scanner windows, lens, reflecting mirror, and protection glass, etc, may cause light print image.

  • Page 35: Overview

    OVERVIEW Cross-section Drawing Exposure drum (Black) Exposure drum (Magenta) <Back side> <Front> Exposure drum (Yellow) Paper eject roller 3 Exposure drum (Cyan) Paper eject roller 2 Registration rear actuator Registration roller MP registration front actuator Paper eject roller 1 MP separation roller Paper eject actuator MP paper pick-up roller Heat roller...

  • Page 36: Paper Feeding

    Paper Feeding DX path <Front> <Back side> Paper eject from the back side. Paper feed from the MP tray. Paper tray 1 path Paper tray 2 path Fig. 2-3 Confidential...

  • Page 37: Operation Of Each Part

    Operation of Each Part Part name Operation T1 paper pick-up roller Feed the paper from the paper tray 1. T1 separation roller, Separate into single sheet from the paper tray 1. T1 separation pad T1 paper edge actuator Detect whether or not the paper tray 1 is installed. Detect whether or not paper is loaded.
  • Page 38 Part name Operation MP registration front actuator Detect the front edge of paper from MP tray and control the drive of the registration roller. Detect the paper jam of MP part. T2 paper pick-up roller Feed the paper from the paper tray 2. T2 separation roller, Separate into single sheet from the paper tray 2.

  • Page 39: Block Diagram

    Block Diagram Front cover sensor Develop drive motor PF drive motor Toner/New sensor PCB Drum drive motor Drum position sensor PCB Develop release motor Develop release sensor PCB T1 paper pick-up solenoid T1 registration front/rear sensor PCB MP paper pick-up solenoid MP paper empty/registration front sensor PCB Registration solenoid T1 paper edge sensor PCB...

  • Page 40: Components

    Components Toner cartridge Top cover ASSY Drum unit Wireless LAN PCB Laser unit Belt unit Paper eject ASSY Fuser cover Back cover Waste toner Fuser unit Low-voltage power supply unit Side cover R ASSY Fuser fan Duplex feed ASSY Registration mark sensor High-voltage holder ASSY...

  • Page 41: Error Indications

    ERROR INDICATIONS This printer includes a self-diagnosis function. If the printer does not work normally it judges that an error has occurred, and indicates the corresponding error message on the LCD, which in turn helps the service men to quickly find out the problem. Error Codes The errors with a mesh background in the table below do not occur in the normal operation.
  • Page 42 Error Refer Error Refer Problem Problem codes codes PF drive motor error. 2-28 Main PCB error. 2-35 (Write error in NVRAM) Drum drive motor error. 2-28 Paper eject motor error. 2-29 Main PCB error. 2-35 (Read error in NVRAM.) Develop release motor error. 2-29 Blower error.
  • Page 43 Error Refer Error Refer Problem Problem codes codes The magenta drum unit will 2-38 The waste toner box near full. 2-43 reach the end of life soon. (The sensor detected that the waste toner became near full.) The cyan drum unit will reach 2-38 the end of life soon.
  • Page 44 Error Refer Error Refer Problem Problem codes codes Fuser unit error. (The center 2-46 Dirt on drum unit. 2-51 thermistor detects 270 °C or Belt unit is at the end of life. 2-54 higher temperature for 1 second.) (The operation is stopped.) Fuser unit error.
  • Page 45 Error Refer Error Refer Problem Problem codes codes Detection of abnormal value of 2-62 Toner of the color which is being 2-67 registration sensor sensitivity used reaches the end of life when implementing adjustment when implementing adjustment of inter-color position alignment. of inter-color position alignment.
  • Page 46 Error Refer Error Refer Problem Problem codes codes The waste toner box is not 2-75 Main PCB error. 2-79 installed. An unidentified error occurred. 2-79 Waste toner box full. (The 2-75 Read error in EEPROM of the 2-80 sensor detects that the waste laser unit.

  • Page 47: Error Messages

    Error Messages The error messages displayed on the LCD of the printer and their description are shown in the table below. Error Refer Error message Description codes Access Error The USB device is taken out while data is being processed. Belt End Soon The belt unit will reach the end of life soon.
  • Page 48 Error Refer Error message Description codes Fuser Error Failure in the center thermistor of the fuser 2-46 unit. 2-46 2-46 2-46 2-47 2-50 2-50 Undecodable data is found during printing. Ignore Data Undecodable PS data is received. Paper is jammed in the duplex paper feed 2-40 Jam Duplex system.

  • Page 49: Replace Fuser

    Error Refer Error message Description codes The paper tray 1 is not installed before printing. 2-23 No Tray (The cassette of the T1 paper edge sensor is open.) The paper tray 1 is not installed. 2-57 The paper tray 2 is not installed before printing. 2-23 (The cassette of the T2 paper edge sensor is open.)

  • Page 50: Short Paper

    Error Refer Error message Description codes Each toner cartridge reached the end of life. 2-44 Replace Toner The color toner reached the end of life during 2-49 printing. Waste toner box full. (The sensor detected that 2-75 Replace WT Box the waste toner became full.) Fuser unit error.
  • Page 51 Error Refer Error message Description codes The waste toner box near full. (The sensor 2-43 WT Box End Soon detected that the waste toner became near full.) 2-20 Confidential...

  • Page 52: Error Cause And Remedy

    Error Cause and Remedy Check the User Check items first. If an error cannot be resolved, follow the procedures in numerical order in the Step field. ■ Error code 0F Duplex Disabled Close the Back Cover of the machine. The back cover is open upon duplex printing. (The back cover sensor is OFF.) <...
  • Page 53 ■ Error code 12 Registration Registration failed. See Troubleshooting chapter in User’s Guide. Inter-color position alignment adjustment failure. (Incorrect measurement value of inter-color position alignment adjustment.) <User Check> - Replace the toner cartridge with a new one. - Replace the belt unit with a new one. - Replace the waste toner box with a new one.
  • Page 54 ■ Error code 17 No Tray A Tray is not detected, install Tray 1. (The paper tray cannot be detected, re-install Tray 1.) The message displayed in the second line on the LCD might be the one in parentheses according to the version. The paper tray 1 is not installed before printing.
  • Page 55 ■ Error code 19 Replace Drum Open the Front Cover, replace the Drum Unit. Refer to the User's Guide for instructions. The drum unit reached the end of life. <User Check> - Replace the drum unit and reset the counter. (Refer to “2.3 Parts Life Reset Function”...
  • Page 56 ■ Error code 1B Drum Stop We cannot guarantee the print quality. Replace the Drum Unit. Refer to the User’s Guide for instructions. Error code 1C Drum Stop We cannot guarantee the print quality. Replace the Drum Unit. Refer to the User’s Guide for instructions.
  • Page 57 ■ Error code 1F More than the specified number of the option trays is installed. This error does not usually occur in the normal use. The conceivable causes are noise around the installation site, fluctuation of the power supply voltage, and failures in the software. <User Check>...
  • Page 58 ■ Error code 24 Print Unable 24 Turn the power off and then back on again. Internal temperature sensor error. Step Cause Remedy Harness connection failure of Check the harness connection of internal internal temperature sensor temperature and reconnect it. Internal temperature sensor Replace the internal temperature sensor.
  • Page 59 ■ Error code 27 Print Unable 27 Turn the power off and then back on again. PF drive motor error. <User Check> - Turn OFF the power switch, and turn it ON again after a while. Step Cause Remedy Harness connection failure of Check the harness connection of the PF drive motor PF drive motor and reconnect it.
  • Page 60 ■ Error code 29 Print Unable 29 Turn the power off and then back on again. Paper eject motor error. <User Check> - Turn OFF the power switch, and turn it ON again after a while. Step Cause Remedy Harness connection failure of Check the harness connection of the paper eject motor paper eject motor and reconnect it.
  • Page 61 ■ Error code 2B Print Unable 2B Turn the power off and then back on again. Blower error. <User Check> - Turn OFF the power switch, and turn it ON again after a while. Step Cause Remedy Harness connection failure of Check the harness connection of the blower blower and reconnect it.
  • Page 62 ■ Error code 2C (K) Print Unable 2C Turn the power off and then back on again. Error code 2D Print Unable 2D Turn the power off and then back on again. Error code 2E Print Unable 2E Turn the power off and then back on again. Error code 2F Print Unable 2F Turn the power off and then back on again.
  • Page 63 ■ Error code 31 Print Unable 31 Turn the power off and then back on again. Density sensor error. Step Cause Remedy Harness connection failure of Check the harness connection of the registration mark sensor holder registration mark sensor holder ASSY and ASSY reconnect it.
  • Page 64 ■ Error code 33 Print Unable 33 Turn the power off and then back on again. Registration mark R PCB ASSY error. Error code 34 Print Unable 34 Turn the power off and then back on again. Registration mark L PCB ASSY error. This error does not usually occur in the normal use.
  • Page 65 ■ Error code 36 Print Unable 36 Turn the power off and then back on again. Error in the high-voltage power supply PCB while the printer is in the standby mode. Step Cause Remedy Harness connection failure of Check the harness connection of the high-voltage power supply PCB high-voltage power supply PCB ASSY and reconnect it.
  • Page 66 ■ Error code 3A Print Unable 3A Turn the power off and then back on again. Engine PCB transfer error. (Communication error between the main CPU and sub CPU.) Step Cause Remedy Harness connection failure Check the harness connection between between engine PCB and main the engine PCB ASSY and main PCB ASSY, and reconnect it.
  • Page 67 ■ Error code 3F Print Unable 3F Turn the power off and then back on again. Write error in engine firmware. This error does not usually occur in the normal use. The conceivable causes are noise around the installation site, fluctuation of the power supply voltage, and failures in the software. <User Check>...
  • Page 68 ■ Error code 43 Print Unable 43 Turn the power off and then back on again. ASIC error of the main PCB. This error does not usually occur in the normal use. The conceivable causes are noise around the installation site, fluctuation of the power supply voltage, and failures in the software. <User Check>...
  • Page 69 ■ Error code 48 Black drum unit is at the end of life. Error code 49 Yellow drum unit is at the end of life. Error code 4A Magenta drum unit is at the end of life. Error code 4B Cyan drum unit is at the end of life.
  • Page 70 ■ Error code 50 Replace Drum Drum unit is at the end of life. Error code 51 Replace PF Kit MP MP paper feeding kit is at the end of life. Error code 52 Replace PF Kit1 Paper feeding kit1 is at the end of life. Error code 53 Replace PF Kit2 Paper feeding kit2 is at the end of life.
  • Page 71 ■ Error code 56 Cover is Open Close the Fuser Cover which can be found behind the Back Cover of the machine. The fuser cover is open. <User Check> - Close the fuser cover properly. Step Cause Remedy Paper eject actuator catching on Correct the position of the paper eject some position actuator.
  • Page 72 ■ Error code 58 Fuser Error Turn the power off, then on again. Leave the machine for 15 min. Error code 59 Self-Diagnostic Will Automatically Restart within 15 minutes. Fuser unit error. Step Cause Remedy Harness connection failure Check the harness connection between between fuser unit connector and the fuser unit connector and paper eject paper eject sensor PCB ASSY...
  • Page 73 ■ Error code 5B Short paper Open the Back Cover and then press Go. It was detected that the length of the paper under printing was less than the specified value. Error code 5C Small paper Open the Back Cover and then press Go. It was detected that the size of the paper was less than the specified value.
  • Page 74 ■ Error code 5F WT Box End Soon The waste toner box near full. (The sensor detected that the waste toner became near full.) <User Check> - Prepare a new waste toner box. Step Cause Remedy Harness connection failure of Check the harness connection of the waste toner sensor waste toner sensor and reconnect it.
  • Page 75 ■ Error code 60 Replace Toner Open the Front Cover, replace Toner Cartridge. Cyan (C) Error code 61 Replace Toner Open the Front Cover, replace Toner Cartridge. Magenta (M) Error code 62 Replace Toner Open the Front Cover, replace Toner Cartridge. Yellow (Y) Error code 63 Replace Toner Open the Front Cover, replace Toner Cartridge.
  • Page 76 ■ Error code 64 Ready Error code 65 Ready Error code 66 Ready Error code 67 Ready Each toner cartridge will reach the end of life soon. : Lighting, : Blinking <User Check> - Gently shake the toner cartridge of the appropriate color from side to side and install it again. - Replace the toner cartridge of the appropriate color.
  • Page 77 ■ Error code 6A Print Unable 6A Turn the power off and then back on again. Fuser unit error. (The center thermistor does not detect 60 °C within the specified time.) Error code 6B Print Unable 6B Turn the power off and then back on again. Fuser unit error.
  • Page 78 ■ Error code 6F Print Unable 6F Turn the power off and then back on again. Fuser unit error. (The center and side thermistors detect extremely high temperature.) (Detection of hardware.) Step Cause Remedy Fuser unit connector connection Reconnect the connector of the fuser unit. failure Fuser unit failure Replace the fuser unit.
  • Page 79 ■ Error code 71 Print Unable 71 Turn the power off and then back on again. Laser unit polygon motor error. Error code 72 Print Unable 72 Turn the power off and then back on again. Beam detecting sensor (Black/Yellow) error of the laser unit. Error code 73 Print Unable 73 Turn the power off and then back on again.
  • Page 80 ■ Error code 74 (This error can be found out only in “Function code 82”.) Replace Toner Open the Front Cover, replace Toner Cartridge. Cyan (C) Replace Toner Open the Front Cover, replace Toner Cartridge. Magenta (M) Replace Toner Open the Front Cover, replace Toner Cartridge. Yellow (Y) Replace Toner Open the Front Cover, replace Toner Cartridge.
  • Page 81 ■ Error code 76 Print Unable 76 Turn the power off and then back on again. Fuser unit error. (The center thermistor detects the sharp temperature rise.) Error code 78 Print Unable 78 Turn the power off and then back on again. Fuser unit error.
  • Page 82 ■ Error code 7B Print Unable 7B Turn the power off and then back on again. Engine PCB error. Step Cause Remedy Harness connection failure Check the harness connection between between engine PCB and main the engine PCB ASSY and main PCB ASSY, and reconnect it.
  • Page 83 ■ Electrodes location of the drum unit and toner cartridge Erase lamp lens Fig. 2-6 ■ Electrodes location of the belt unit Fig. 2-7 2-52 Confidential...
  • Page 84 ■ Electrodes location of waste toner box Fig. 2-8 ■ Electrodes location of main body Developer roller Charging (Corona wire) Grid Cleaning roller Erase lamp lens Belt transfer roller Paper powder cleaner Belt cleaning roller Waste toner cleaner roller Waste toner cleaner shaft Fig.
  • Page 85 ■ Error code 7E Replace Belt Open the Front Cover, replace the Belt Unit. Belt unit is at the end of life. (The operation is stopped.) <User Check> - Replace the belt unit with a new one and reset the counter. (Refer to “2.3 Parts Life Reset Function”...
  • Page 86 ■ Error code 81 Calibrate Calibration failed. See Troubleshooting chapter in User's Guide. Incorrect density sensor measurement value when implementing adjustment of color density. Error code 82 Calibrate Calibration failed. Press Go, and try again. Density patch measurement is not completed normally when implementing adjustment of color density.
  • Page 87 ■ Error code 84 Jam Rear Open the Back Cover and remove the jammed paper. Paper jam at the rear section of the printer. <User Check> - Check if the paper is jammed. If jammed, remove it. Step Cause Remedy Foreign object around paper Remove the foreign object.

  • Page 88: Error Code 85

    ■ Error code 85 No Tray A Tray is not detected, install Tray 1. (The paper tray cannot be detected, re-install Tray 1.) The message displayed in the second line on the LCD might be the one in parentheses according to the version. The paper tray 1 is not installed.
  • Page 89 ■ Error code 87 Calibrate Calibration failed. Insufficient Toner for Calibration. Toner of the color which is being used reaches the end of life when implementing adjustment of color density. <User Check> - Replace the toner cartridge with a new one. Step Cause Remedy...
  • Page 90 ■ Error code 89 Size Error DX Specify the correct paper and press Go. Unsupported paper size is used for duplex printing. <User Check> - Use the A4 or Letter size paper. - Check if the thickness of the paper is 60 to 105 g/m Step Cause Remedy...
  • Page 91 ■ Error code 8B Jam Tray 2 Remove the jammed paper from Tray 2. Paper jam in the paper tray 2. <User Check> - Check if the paper is jammed in the paper tray 2. If jammed, remove it. - Check if the paper is loaded into the paper tray 2 correctly. - Turn back the paper loaded in the paper tray 2 or change the orientation of the paper by 180°.
  • Page 92 ■ Error code 8C Jam MP Tray Remove the jammed paper from Multi Purpose Tray and press Go. Paper jam in the MP tray. <User Check> - Check if paper is jammed around the MP tray. If paper is jammed, remove the jammed paper. - Check if the paper is loaded into the MP tray correctly.
  • Page 93 ■ Error code 8E Registration Registration failed. Press Go, and try again. Error in the adjustment of inter-color position alignment result when implementing it. <User Check> - Check if there is a scratch, dirt or the like on the belt unit. If there is, replace the belt unit with a new one.
  • Page 94 ■ Error code 90 Size Mismatch Load <size> paper in Multi Purpose Tray and press Go. The paper size of the MP tray does not match that of the print setting. Error code 91 Size Mismatch Load <size> paper in Tray1 and press Go. The paper size of the paper tray 1 does not match that of the print setting.
  • Page 95 ■ Error code 94 No Paper Load <size> paper in Tray 1. No paper is loaded in the paper tray 1. (Registration front sensor fails to be turned ON.) <User Check> - Load paper in the paper tray 1. Step Cause Remedy Coming off of registration front...
  • Page 96 ■ Error code 96 No Paper Load <size> paper in Tray. No paper in all trays. <User Check> - Load paper in any tray. Step Cause Remedy Engine PCB failure Replace the engine PCB ASSY. Main PCB failure Replace the main PCB ASSY. ■...
  • Page 97 ■ Error code 9A Manual Feed Load <size> Paper. No paper is loaded in the MP tray (MP paper empty sensor fails to be turned ON.) <User Check> - Load paper in the MP tray. Step Cause Remedy Coming off of MP paper empty Re-assemble the MP paper empty actuator actuator.
  • Page 98 ■ Error code 9E Registration Registration failed. Insufficient Toner for Registration. Toner of the color which is being used reaches the end of life when implementing adjustment of inter-color position alignment. <User Check> - Replace the toner cartridge with a new one. Step Cause Remedy...
  • Page 99 ■ Error code A1 Cover is Open Close the Front Cover. The front cover is open. <User Check> - Close the front cover properly. Step Cause Remedy Harness connection failure of Check the harness connection of the front cover sensor front cover sensor and reconnect it.
  • Page 100 ■ Error code AA Error code AB Error code AE Error code B5 Error code B6 Error code BA Error code BE This error does not usually occur in the normal use. The conceivable causes are noise around the installation site, fluctuation of the power supply voltage, and failures in the software. <User Check>...
  • Page 101 ■ Error code C0 Cartridge Error Put the Black (K) Toner Cartridge back in. Failure to detect a new black toner cartridge. Error code C1 Cartridge Error Put the Yellow (Y) Toner Cartridge back in. Failure to detect a new yellow toner cartridge. Error code C2 Cartridge Error Put the Magenta (M) Toner Cartridge back in.
  • Page 102 ■ Error code C4 Tray 2 Error Take out Tray 2 and push it back in firmly. Paper tray 2 pressing plate up/down error. <User Check> - Check if the paper tray 2 is installed into the printer. Step Cause Remedy Harness connection failure of Check the harness connection of the...
  • Page 103 ■ Error code C6 Toner Error One or more Toner Cartridges are not detected. Pull out and reinsert all 4 Toner Cartridges. Pressure engagement/disengagement failure of toner cartridge. Step Cause Remedy Harness connection failure of Check the harness connection of the develop release motor develop release motor and reconnect it.
  • Page 104 ■ Error code C9 DIMM Error Defective DIMM is installed. <User Check> - Replace the DIMM. Step Cause Remedy Main PCB failure Replace the main PCB ASSY. ■ Error code CA Unusable Device Remove the Device. Turn the power off and back on again. USB device overcurrent error.
  • Page 105 ■ Error code CC No Fuser Unit Install the Fuser Unit The fuser unit is not installed. This error does not usually occur in the normal use. The conceivable causes are noise around the installation site, fluctuation of the power supply voltage, and failures in the software. <User Check>...
  • Page 106 ■ Error code CE No Waste Toner Install the Waste Toner Box. Refer to the User's Guide for instructions. The waste toner box is not installed. <User Check> - Check if the waste toner box is installed into the printer. - Replace the waste toner box with a new one.
  • Page 107 ■ Error code D2 Error code D3 Error code D4 Error code D5 Error code D6 Error code D7 Error code D8 Error code D9 Error code DA Error code DB Error code DC This error does not usually occur in the normal use. The conceivable causes are noise around the installation site, fluctuation of the power supply voltage, and failures in the software.
  • Page 108 ■ Error code DE Print Unable DE Turn the power off and then back on again. When the center thermistor is higher than the idle temperature, it is detected that the side thermistor temperature is lower than 60 °C. Step Cause Remedy Harness connection failure...
  • Page 109 ■ Error code E2 Print Unable E2 Turn the power off and then back on again. When the center thermistor is lower than the idle temperature, it is detected that the side thermistor temperature is higher than 280 °C. Step Cause Remedy Heat roller dirty...
  • Page 110 ■ Error code E6 Print Unable E6 Turn the power off and then back on again. Write error in EEPROM of the main PCB. Step Cause Remedy Main PCB failure Replace the main PCB ASSY. ■ Error code E7 Error code E8 This error does not usually occur in the normal use.
  • Page 111 ■ Error code EB Print Unable EB Turn the power off and then back on again. Read error in EEPROM of the laser unit. Step Cause Remedy Harness connection failure Check the harness connection between between laser unit and main the laser unit and main PCB ASSY, and PCB ASSY reconnect it.
  • Page 112 ■ Error code EE Print Unable EE Turn the power off and then back on again. Unavailability of communication after connecting to the wireless LAN PCB is detected. (Wireless LAN model only) Step Cause Remedy Harness connection failure of Check the harness connection of the wireless LAN PCB wireless LAN PCB and reconnect it.
  • Page 113 ■ Error code F1 Error code F2 WT Box End Soon The waste toner box will reach the end of life soon. (The belt cleaner voltage becomes lower than the specified value.) Error code F3 This error does not usually occur in the normal use. The conceivable causes are noise around the installation site, fluctuation of the power supply voltage, and failures in the software.
  • Page 114 ■ Error code F5 Main PCB communication error Error code F6 P.C.I error Error code F8 Battery connection error This error does not usually occur in the normal use. The conceivable causes are noise around the installation site, fluctuation of the power supply voltage, and failures in the software. <User Check>...
  • Page 115 ■ Error code FA (K) No Toner Open the Front Cover, then install Toner Cartridge. The black drum unit is not installed. Error code FB (C) No Toner Open the Front Cover, then install Toner Cartridge. The cyan drum unit is not installed. Error code FC (M) No Toner Open the Front Cover, then install Toner Cartridge.
  • Page 116 ■ Error code FE Calibrate Calibration failed. Press Go, and try again. Detection of incorrect measurement value of density sensor sensitivity calibration. <User Check> - Replace the waste toner box with a new one. - Replace the belt unit with a new one. Step Cause Remedy...

  • Page 117: Paper Feeding Problems

    Paper Feeding Problems Problems related to paper feeding are end user recoverable if following the User Check items. If the same problem occurs again, follow each procedure in the order of the number described in the Step column in the tables below. 3.4.1 No feeding ■...
  • Page 118 ■ Paper fails to be supplied from the paper tray 2 (Error code 27, etc) <User Check> - Check if the Tray Use setting is fixed to other tray. - Check if the paper is loaded into the paper tray 2 correctly. - Check if the size of the paper is smaller than the specifications.
  • Page 119 ■ Paper fails to be supplied from the MP tray (Error code 27, etc) <User Check> - Check if the Tray Use setting is fixed to other tray. - Check if the paper is loaded into the MP tray correctly. - Check if the thickness of the paper is 60 to 163 g/m Step Cause...

  • Page 120: Double Feeding

    3.4.2 Double feeding <User Check> - Check if too much paper is not loaded in each paper tray. - Check if paper is properly loaded in each paper tray. - Turn back the paper loaded in the each paper tray or change the orientation of the paper by 180°. - Check if the thickness of the paper is 60 to 105 g/m .
  • Page 121 ■ Paper jam at the paper tray 2 (Error code 8B, etc) <User Check> - Check if the paper is loaded into the paper tray 2 correctly. - Turn back the paper loaded in the paper tray 2 or change the orientation of the paper by 180°. - Adjust the paper guide corresponding to the paper size.
  • Page 122 ■ Paper jam at the MP tray (Error code 8C) <User Check> - Check if the paper is loaded into the MP tray correctly. - Turn back the paper loaded in the MP tray or change the orientation of the paper by 180°. - Adjust the paper guide corresponding to the paper size.
  • Page 123 ■ Paper jam in the back cover and paper eject section (Error code 84, etc.) Step Cause Remedy Foreign object around paper eject Remove the foreign object. ASSY Coming off of back flapper ASSY Re-assemble the back flapper ASSY. Paper eject actuator Re-assemble the paper eject actuator.

  • Page 124: Dirt On Paper

    3.4.4 Dirt on paper <User Check> - Check if the paper is loaded into the paper tray correctly. - Turn back the paper loaded in the paper tray or change the orientation of the paper by 180°. - Replace the toner cartridge with a new one. - Replace the waste toner box with a new one.

  • Page 125: Image Defect Troubleshooting

    Image Defect Troubleshooting 3.5.1 Image defect examples Light on the One color is light (2-96) Faulty registration (2-97) Dark (2-97) whole page (2-95) Completely blank All one color (2-100) Poor fixing (2-98) Image distortion (2-99) (2-99) Dirt on back side of paper (2-100) Vertical streaks (2-101) Vertical streaks in a dark background (2-102) White vertical streaks on one color image (2-103)

  • Page 126: Pitch Indicated In Roller Image

    3.5.2 Pitch indicated in roller image Image defects which occur periodically may be caused by a failure of the roller. By referring to the table below, specify the cause based on the pitch indicated in the image of each roller. Parts name The pitch which appears in the image Developer roller...

  • Page 127: One Color Is Light

    ■ One color is light <User Check> - Open and close the front cover and make print again. - Check the printer’s environment. High temperature and high humidity or low temperature and low humidity conditions can cause this problem. - Wipe the scanner windows of the laser unit with a soft, lint-free cloth. (Refer to Fig.

  • Page 128: Faulty Registration

    ■ Faulty registration Step Cause Remedy Registration rear actuator Correct catching of the registration rear catching on some position actuator. Engine PCB failure Replace the engine PCB ASSY. ■ Dark <User Check> - Check the printer’s environment. High temperature and high humidity or low temperature and low humidity conditions can cause this problem.

  • Page 129: Poor Fixing

    ■ Poor fixing <User Check> - Check if the scanner window of the laser unit is dirty. (Refer to Fig. 2-12 (P2-95)) - Use the specified paper. - Open and close the front cover and make print again. - Adjust the color calibration from the control panel. - Adjust the auto registration from the control panel.

  • Page 130: Image Distortion

    ■ Completely blank <User Check> - Replace the belt unit with a new one. - Replace the toner cartridge or drum unit with a new one. Step Cause Remedy Developing bias voltage Clean the electrodes of the drum unit and conduction failure main body.

  • Page 131: All One Color

    ■ All one color <User Check> - Replace the drum unit with a new one. Memo You can check this image defect with the function code 71. (Refer to “1.4.17 Color test pattern (Function code 71)” in Chapter Step Cause Remedy Corona wire failure Clean the electrodes of the drum unit and...

  • Page 132: Vertical Streaks

    ■ Vertical streaks <User Check> - This problem may occur with noise which is caused by dirt on the corona wire in the drum unit. In this case, clean the corona wire. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab.

  • Page 133: Vertical Streaks In A Dark Background

    ■ Vertical streaks in a dark background <User Check> - Clean the inside of the printer and the corona wire in the drum unit. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab. - Replace the toner cartridge with a new one.

  • Page 134: White Vertical Streaks On One Color Image

    ■ White vertical streaks on one color image <User Check> - Check if there is no dust in the gap between the toner cartridge and drum frame. - Wipe the scanner windows of the laser unit with a soft, lint-free cloth. (Refer to Fig.

  • Page 135: Faint Print

    ■ Faint print <User Check> - Open and close the front cover and make print again. - Check that the printer is installed on a level surface. - Check if the orange protection material is removed from the drum unit. - Wipe the scanner windows of the laser unit with a soft, lint-free cloth.

  • Page 136: White Spots On One Color Image

    ■ White spots on one color image <User Check> - Check if the fuser fan and low-voltage power supply PCB fan are not blocked. - Toner may be empty. Replace the toner cartridge with a new one. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab. - The drum unit may be damaged.

  • Page 137: One Color Spots Or Dirt

    ■ One color spots or dirt <User Check> - Damp (wet) paper might be used. Try to changing to freshly unopened paper. - Toner may be empty. Replace the toner cartridge with a new one. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab. - The drum unit may be damaged.

  • Page 138: Horizontal Lines

    ■ Downward fogging of solid color <User Check> - Toner may be empty. Replace the toner cartridge with a new one. Step Cause Remedy High-voltage power supply Replace the high-voltage power supply PCB PCB failure ASSY. Engine PCB failure Replace the engine PCB ASSY. Main PCB failure Replace the main PCB ASSY.
  • Page 139 ■ Inter-color position alignment <User Check> - Implement the adjustment of inter-color position alignment from the control panel. - Replace the belt unit with a new one. - Replace the drum unit with a new one. Step Cause Remedy Phase displacement of drum Align the drum phase.

  • Page 140: Hollow Print

    ■ Unstable color density <User Check> - Make a print on a different type of paper. - Replace the belt unit with a new one. - Replace the drum unit with a new one. - Replace the waste toner box with a new one. - Replace the toner cartridge with a new one.

  • Page 141: Print Crease

    ■ Print crease <User Check> - Check the printer’s environment. This symptom occurs when the printer is used in the high humidity environment. - Change the paper to thick paper. - Check if paper is not damp. Step Cause Remedy The pressure of the pressure Change the position of the PR arm covers.

  • Page 142: Software Setting Problems

    Software Setting Problems The end user can solve problems pertaining to software, for instance, print cannot be made from a computer although test print and printer setting print can be made from the printer, by following the User Check items. If the same problem occurs, follow each procedure in the order of the number described in the Step column in the tables below.

  • Page 143: Others Problems

    Others Problems 3.8.1 The printer is not turned ON, or the LCD indication does not appear Step Cause Remedy AC cord failure Replace the AC cord. Harness connection failure of Reconnect the panel PCB ASSY harness. panel PCB ASSY Harness connection failure of Reconnect the LCD harness.

  • Page 144: The Usb Direct Interface Does Not Work (Error Code Ca, Etc)

    3.8.3 The USB direct interface does not work (Error code CA, etc) <User Check> - Check if the data is supported device. - Replace the USB flash memory and check if the interface works. - Turn OFF and ON the power. - Reduce the data in the USB flash memory.

  • Page 145: Chapter 3 Disassembly And Assembly

    CHAPTER 3 DISASSEMBLY AND ASSEMBLY Confidential...
  • Page 146 CHAPTER 3 DISASSEMBLY AND ASSEMBLY This chapter describes procedures for disassembling and assembling the printer with relates notes. The provided disassembly order flow enables you to take in the quickest way to get an involved part at a glance. At the start of disassembling, you can check the disassembly order flow which guides you through a shortcut to get to the part.
  • Page 147 9.15 LCD ASSY ......................3-53 9.16 Panel PCB ASSY ....................3-55 9.17 USB Host Relay PCB ASSY................... 3-56 9.18 Main PCB ASSY ..................... 3-58 9.19 Engine PCB ASSY ....................3-60 9.20 Laser Unit ....................... 3-61 9.21 Develop Release Motor ..................3-64 9.22 Front Cover Sensor ....................
  • Page 148 10. DISASSEMBLY PROCEDURE (LT-300CL) .........3-129 10.1 T2 Paper Tray Unit ....................3-129 10.2 T2 Separation Roller ASSY/T2 Paper Feed Roller ASSY 1 ......... 3-131 10.3 T2 Cover Rear ...................... 3-133 10.4 T2 Cover Left ......................3-134 10.5 T2 Cover Right ..................... 3-135 10.6 T2 Relay PCB ASSY ....................

  • Page 149: Safety Precautions

    SAFETY PRECAUTIONS To avoid creating secondary problems by mishandling, follow the warnings and precautions below during maintenance work. WARNING Some parts inside the printer are extremely hot immediately after the printer is used. When opening the front cover or back cover to access any parts inside the printer, never touch the shaded parts shown in the following figures.

  • Page 150: Packing

    PACKING T2 styrofoam pad ASSY T2 styrofoam pad ASSY T2 carton CD ROM ASSY Set guide Accessory bag User's guide AC cord Polystyrene pad ASSY Printer Polystyrene pad ASSY Carton Carton spacer Carton spacer Carton outer Confidential...

  • Page 151: Screw Catalogue

    SCREW CATALOGUE Taptite bind B Taptite flat B Taptite bind B Taptite flat B M3x8 M3x10 Taptite bind B Screw bind M3x10 Screw bind M3x4 Taptite bind B M3x12 Shoulder screw Taptite bind B M4x12 Shoulder screw Taptite bind S Taptite pan Taptite bind S M3x6...

  • Page 152: Screw Torque List

    SCREW TORQUE LIST Note: For verifying the shape of each screw, refer to “3. SCREW CATALOGUE” in this chapter. Tightening torque Location of screw Screw type Q' ty · · m (kgf Fuser cover L Taptite bind S M3x8 0.70±0.10 (7±1) Fuser cover R Taptite bind S M3x8 0.70±0.10 (7±1)
  • Page 153 Tightening torque Location of screw Screw type Q' ty · · m (kgf T1 solenoid ASSY Taptite bind B M3x8 0.35±0.05 (3.5±0.5) Paper eject ASSY Taptite cup S M3x6 SR 0.70±0.10 (7±1) Eject duct Taptite bind B M4x12 0.80±0.10 (8±1) Paper eject motor Taptite bind S M3x6 0.70±0.10 (7±1)

  • Page 154: Lubrication

    LUBRICATION The kind of the lubricating oil Lubrication point Quantity of lubrication (Maker name) MOLYKOTE PG-661 (W) PF plate ASSY 1.5 mm dia. ball PG1.5 (Dow Corning) Front cover arm L 1.5 mm dia. ball PG1.5 Front cover arm R 1.5 mm dia.
  • Page 155 Front cover Front cover arm R Front cover arm L PG1.5 PG1.5 PG1.5: MOLYKOTE PG-661 (W) (1.5 mm dia. ball) Confidential...

  • Page 156: Overview Of Gears

    OVERVIEW OF GEARS When ordering spare parts, please refer to Parts reference list. ■ Top drive ASSY <Layout view> <Development view> <Name of gears> LY0192 Develop joint gear Z48 LY0213 Gear Z60 LY0196 Drum coupling gear Z52 LY0217 Gear Z50 LY0197 Drum double idle gear Z64-26 LY0214...
  • Page 157 ■ PF ASSY <Layout view> <Development view> <Name of gears> LU5132 Registration gear LY0298 Registration/Pinch roller gear bush LY0299 Pinch roller drive gear * These parts are subject to change without notice. Confidential...

  • Page 158: Harness Routing

    HARNESS ROUTING Top Cover ASSY Top cover ASSY Hook Panel cover ASSY Panel PCB ASSY USB host relay PCB ASSY Front Top cover ASSY USB host relay PCB ASSY “a” Hole “b” Wireless LAN PCB Top cover ASSY “c” “c” Ferrite core Top cover ASSY Ferrite...

  • Page 159: Laser Unit

    Laser Unit Laser unit “b” “c” Front Clamp Upper cable rack “a” “c” “b” Hole Panel cable rack “c” Hook “b” Upper cable rack Hole Panel cable rack CN15 “a” CN19 CN25 Hook Front Main PCB ASSY Engine PCB ASSY 3-11 Confidential...

  • Page 160: Develop Release Motor

    Develop Release Motor Develop release motor Panel cable rack Hook CN20 Front Engine PCB ASSY Front Cover Sensor Panel cable rack Front cover sensor Hook CN14 Hook Front Engine PCB ASSY 3-12 Confidential...

  • Page 161: Top Drive Assy

    Top Drive ASSY Develop release “d” sensor PCB ASSY Mono solenoid ASSY Hook “c” Hook Hook “a” “e” “b” Hook Front Hook Top Drive ASSY (back side) Drum position sensor PCB ASSY Registration solenoid ASSY Develop FFC holder “e” Fuser develop Hook motor ASSY Ferrite core...
  • Page 162 PF Plate ASSY Engine PCB ASSY Hook PF line holder Hook Hook Front Hook T1 solenoid ASSY PF plate ASSY PF cleaner drive ASSY Toner/New Sensor PCB ASSY Hook Hook Panel cable rack Hook CN16 Toner/new sensor PCB ASSY Front Engine PCB ASSY 3-14 Confidential...
  • Page 163 Low-voltage Power Supply PCB ASSY Low-voltage power supply cover Paper eject sensor PCB ASSY “a” Low-voltage power supply PCB ASSY “b” “c” Front Lower cable rack Engine PCB ASSY Main PCB ASSY Hook CN23 CN24 “a” “c” Lower cable rack Top drive ASSY “b”...

  • Page 164: Paper Eject Assy

    Paper Eject ASSY High-voltage power supply PCB ASSY (for CN1,CN2) “c2” “c1” Hook Hook Ferrite core Back cover sensor ASSY • • Paper eject ASSY “c1” Front Ferrite core Hook “b” “c1” “a” “c2” Paper eject “a” “c2” motor “b” “b”...
  • Page 165 Registration Mark Sensor Holder ASSY Front Shutter solenoid High-voltage power supply PCB ASSY Hook Hole Registration mark sensor holder ASSY Lower cable rack Hook Front “c” “a” Ferrite core “b” Main PCB ASSY Ferrite core CN26 CN25 CN27 Lower cable rack “b”...
  • Page 166 MP Paper Empty/Registration Front Sensor PCB ASSY MP upper cover ASSY MP paper empty/ registration front Registration/Pinch sensor PCB ASSY roller gear bush Front MP paper empty/ registration front sensor PCB ASSY Registration/Pinch roller gear bush Engine PCB ASSY Hook CN12 Hook MP upper cover ASSY...
  • Page 167 PF ASSY T1 paper edge sensor T1 registration PCB ASSY front/rear sensor PCB ASSY PF ASSY T1 registration front/rear sensor PCB ASSY T1 paper edge sensor PCB ASSY Front MP sector solenoid Hook “a” Engine PCB ASSY Hole “a” “b” “c”...

  • Page 168: Internal Temperature Thermistor

    Internal Temperature Thermistor Main PCB Hook Internal Internal temperature temperature thermistor thermistor CN21 Internal temperature thermistor Hook Lower cable rack Hook 3-20 Confidential...

  • Page 169: Disassembly Flow

    DISASSEMBLY FLOW Disassembly/Re-Assembly (second) 3-21 Confidential...

  • Page 170: Disassembly Procedure

    DISASSEMBLY PROCEDURE ■ Preparation Prior to proceeding with the disassembly procedure, (1) Unplug - the AC cord, - the USB cable, if connected, - the LAN cable, if connected, and - USB flash memory drive, if connected. - LAN port cap (2) Remove - the Paper tray, - the Toner cartridge,...

  • Page 171: Paper Tray

    Paper Tray (1) Release the Hook to remove the T1 separation pad holder ASSY from the Paper tray. T1 separation pad holder ASSY “A” Paper tray “B” Hook Fig. 3-1 Assembling Note: Mount the T1 separation pad holder ASSY in a way that “A” of the T1 separation pad holder ASSY is inserted into “B”...

  • Page 172: Paper Stopper

    Paper Stopper (1) Remove the two Pins to remove the Paper stopper from the Main body. Paper stopper Paper stopper Main body <Front> Fig. 3-3 3-24 Confidential...

  • Page 173: Back Cover/Back Cover Stopper Arm L/R

    Back Cover/Back Cover Stopper Arm L/R (1) Open the Back cover. Main body Back cover <Back side> Fig. 3-4 (2) Remove the Back cover stopper arm L and R from the Main body. Main body Back cover stopper arm L Back cover stopper arm L Back cover stopper arm R <Back side>...
  • Page 174 (3) Remove the Shaft of the Back cover from the Bush on the right side of the Main body. Main body Bush Shaft Back cover <Back side> Fig. 3-6 (4) Remove the Back cover. Main body Back cover <Back side> Fig.
  • Page 175 (5) Remove the Back cover stopper arm L and R from the Back cover. Back cover stopper arm L Back cover Back cover stopper arm R Back cover stopper arm R Back cover Center Fig. 3-8 3-27 Confidential...

  • Page 176: Fuser Cover

    Fuser Cover (1) Open the Back flapper ASSY. Main body Back flapper ASSY <Back side> Fig. 3-9 (2) Release of the Fuser cover lock lever L and R and open the Fuser cover. Main body Fuser cover lock lever L Fuser cover Fuser cover lock lever R <Back side>...
  • Page 177 (3) Remove the Taptite bind S M3x8 screw from the Fuser cover L. (4) Release the Hook to remove the Fuser cover L from the Main body. Main body Fuser cover L Taptite bind S M3x8 Hook <Back side> Fig. 3-11 (5) Slide the Fuser cover in the direction of the arrow 5a to remove it to the front.

  • Page 178: Fuser Unit

    Fuser Unit (1) Remove the Taptite bind S M3x8 screw from the Fuser cover R. (2) Release the Hook to remove the Fuser cover R from the Main body. Hook Main body Fuser cover R Taptite bind S M3x8 <Back side> Fig.
  • Page 179 (4) Disconnect the Electrode terminal from the Fuser unit. Electrode terminal (small) Fuser unit Electrode terminal (large) Fig. 3-15 (5) Remove the two Taptite pan B M4x14 screws to remove the Fuser unit from the Main body. Main body Taptite pan B M4x14 Fuser unit <Back side>...
  • Page 180 Note: - Do not apply a physical impact or vibration to the Fuser unit. - Do not touch the roller as shown in the figure below to prevent breakage of the Fuser unit. Fuser unit Fig. 3-17 3-32 Confidential...

  • Page 181: Side Cover L/Access Cover

    Side Cover L/Access Cover (1) Open the Front cover. Main body Front cover <Front> Fig. 3-18 (2) Remove the Taptite bind S M3x8 screw from the front of the Side cover L. (3) Remove the Taptite bind B M4x12 screw from the side of the Side cover L. Taptite bind S M3x8 Taptite bind B M4x12 <Front>...
  • Page 182 (4) Remove the two Taptite cup S M3x8 screws from the back of the Side cover L. Side cover L Taptite cup S M3x8 <Back side> Fig. 3-20 (5) Release the Hooks 1 and 2 at the same time, and then release the Hooks 3 to 6 in numerical order.
  • Page 183 * Inside of Side cover L Hook 8 Hook 7 Side cover L Hook 9 Hook 6 Hook 5 Hook 1 <Front> <Back> Hook 2 Hook 3 Hook 4 Fig. 3-22 (6) Remove the Access cover from the Side cover L. Access cover Side cover L Fig.

  • Page 184: Side Cover R Assy

    Side Cover R ASSY (1) Remove the Taptite bind S M3x8 screw from the front of the Side cover R ASSY. (2) Remove the Taptite bind B M4x12 screw from the side of the Side cover R ASSY. Side cover R ASSY Taptite bind S M3x8 Taptite bind B M4x12 <Front>...
  • Page 185 (4) Release the Hooks 1 and 2 at the same time, and then release the Hooks 3 to 6 in numerical order. Hold the "A" section and lift the cover to release the Hook 7. Lower the cover, and then lift it again and release the Hooks 8 and 9 to remove the Side cover R ASSY from the Main body.

  • Page 186: Duplex Feed Assy

    Duplex Feed ASSY (1) Remove the two Taptite cup B M3x12 screws to remove the Duplex feed ASSY from the Main body. Main body <Back side> Duplex feed ASSY Taptite cup B M3x12 Fig. 3-28 3-38 Confidential...

  • Page 187: Mp Cover Assy/Mp Paper Guide Assy

    MP Cover ASSY/MP Paper Guide ASSY (1) Close the Front cover. (2) Open the MP cover ASSY. Front cover <Front> MP cover ASSY Fig. 3-29 (3) Remove the Pin of the MP link L and R from the MP cover ASSY. MP link R MP cover ASSY MP link...
  • Page 188 (4) Remove the Pin of the MP link L and R from the MP paper guide ASSY. <Front> MP link R MP paper guide ASSY MP paper guide ASSY MP link L MP cover ASSY MP link L/R Fig. 3-31 (5) Slide the MP paper guide ASSY in the direction of the arrow to remove from MP cover ASSY.
  • Page 189 (6) Remove the two Pins to remove the MP cover ASSY from the Front cover. Front cover MP cover ASSY <Front> Fig. 3-33 3-41 Confidential...

  • Page 190: Mp Link L/R

    9.10 MP Link L/R (1) Remove the MP link L and R from the Front cover. Front cover MP link L MP link R MP link L <Front> Fig. 3-34 3-42 Confidential...

  • Page 191: Front Cover Arm L/R

    9.11 Front Cover Arm L/R (1) Open the Front cover. (2) Release the Hook to remove the Forced develop release link from the Front cover. Hook Forced develop release link Forced develop release link Front cover <Front> Fig. 3-35 (3) Release the Hook to remove the Joint release link from the Front cover. Hook Joint release link Joint release link...
  • Page 192 (4) Remove the Front cover from the Main body. Boss Main body Boss Front cover arm R Boss Boss Front cover arm L Front cover <Front> Fig. 3-37 (5) Remove the Taptite bind B M4x12 screw from the Front cover arm L. Front cover arm L Taptite bind B M4x12 Front cover...
  • Page 193 (6) Release the Hook to remove the Front cover arm L from the Front cover. Front cover arm L Hook Front cover Fig. 3-39 (7) Remove the Taptite bind B M4x12 screw from the Front cover arm R. Taptite bind B M4x12 Front cover arm R Front cover Fig.
  • Page 194 (8) Release the Hook to remove the Front cover arm R from the Front cover. Front cover arm R Hook Front cover Fig. 3-41 3-46 Confidential...

  • Page 195: Front Cover Release Button/Front Cover Release Button Spring

    9.12 Front Cover Release Button/Front Cover Release Button Spring (1) Fasten the Hook of the Front cover release button to the Rib of the Front cover. Hook Front cover release button Front cover release button Front cover Fig. 3-42 (2) Tilt the Front cover release button in the direction of the arrow 2. (3) Slide it in the direction of the arrow 3 to remove the shaft, and then remove the Front cover release button from the Front cover.
  • Page 196 (4) Remove the Front cover release button spring from the Front cover release button. Front cover release button Front cover release button spring Fig. 3-44 Assembling Note: When assembling the Front cover release button spring, assemble “A” and “B” as shown in the figure.

  • Page 197: Top Cover Assy

    9.13 Top Cover ASSY (1) Remove the six Taptite cup S M3x6 SR screws to remove the Main shield cover plate ASSY from the Main body. Main body Taptite cup S M3x6 SR Main shield cover plate ASSY Taptite cup S M3x6 SR <Left side>...
  • Page 198 (3) Remove the Taptite cup S M3x6 SR screw from the front of the Top cover ASSY. Top cover ASSY Taptite cup S M3x6 SR <Front> Fig. 3-48 (4) Remove the two Taptite bind B M4x12 screws from the back of the Top cover ASSY. Top cover ASSY Taptite bind B M4x12 Taptite bind B M4x12...
  • Page 199 (5) Release the three Hooks 1, and then release the Hooks 2 to 7. Insert a screwdriver into the hole to release the Hook and press the Hook 8 with the screwdriver to release it. Release the Hook 9 by pressing it with a screwdriver to remove the Top cover ASSY from the Main body.

  • Page 200: Wireless Lan Pcb

    9.14 Wireless LAN PCB (1) Remove the Pin to remove the Wireless LAN PCB from the Top cover ASSY. Top cover ASSY Wireless LAN PCB Fig. 3-51 (2) Remove the Wireless LAN harness ASSY from the Wireless LAN PCB. Wireless LAN harness ASSY Wireless LAN PCB Fig.

  • Page 201: Lcd Assy

    9.15 LCD ASSY (1) Turn the Top cover ASSY upside down. (2) Remove the three Taptite bind B M4x12 screws from the Top cover ASSY. Taptite bind B M4x12 Taptite bind B M4x12 Top cover ASSY Fig. 3-53 (3) Release the two Hooks to remove the Panel cover ASSY from the Top cover ASSY. Top cover ASSY Hook Hook...
  • Page 202 (4) Disconnect the Flat cable (CN1) from the Panel PCB ASSY. LCD ASSY Flat cable Panel PCB ASSY Fig. 3-55 (5) Remove the two Pins to remove the LCD ASSY from the Panel cover ASSY. LCD ASSY Panel cover ASSY Fig.

  • Page 203: Panel Pcb Assy

    9.16 Panel PCB ASSY (1) Release the two Hooks to remove the Panel PCB ASSY from the Panel cover ASSY. Panel cover ASSY Hook Panel PCB ASSY Fig. 3-57 (2) Remove the Panel PCB harness ASSY from the CN2 of the Panel PCB ASSY. Panel PCB harness ASSY Panel PCB ASSY Fig.

  • Page 204: Usb Host Relay Pcb Assy

    9.17 USB Host Relay PCB ASSY (1) Remove the two Taptite bind B M4x12 screws from the Panel cover ASSY. Taptite bind B M4x12 Panel ground plate Panel cover ASSY Fig. 3-59 (2) Lift “A” of the Panel ground plate to remove the USB host relay PCB ASSY from the Panel cover ASSY.
  • Page 205 (3) Remove the Main USB host harness ASSY from the USB host relay PCB ASSY. Main USB host harness ASSY USB host relay PCB ASSY Fig. 3-61 Harness routing: Refer to “ Top Cover ASSY” 3-57 Confidential...

  • Page 206: Main Pcb Assy

    9.18 Main PCB ASSY (1) Disconnect the eight Connectors (CN1, CN2, CN16, CN17, CN18, CN19, CN20, and CN21) and two Flat cables (CN5 and CN14). Note: - After disconnecting flat cable(s), check that each cable is not damaged at its end or shortcircuited.
  • Page 207 (2) Remove the three Taptite cup S M3x6 SR screws to remove the Main PCB ASSY from the Top drive ASSY. Top drive ASSY Main PCB ASSY Taptite cup S M3x6 SR Taptite cup S M3x6 SR <Left side> Fig. 3-63 3-59 Confidential...

  • Page 208: Engine Pcb Assy

    9.19 Engine PCB ASSY (1) Disconnect the 17 Connectors (CN3, CN5, CN8, CN9, CN10, CN11, CN12, CN13, CN14, CN16, CN17, CN18, CN19, CN20, CN21, CN22, and CN23) and four Flat cables (CN1, CN2, CN15 and CN25). Note: - After disconnecting flat cables, check that each cable is not damaged at its end or shortcircuited.

  • Page 209: Laser Unit

    9.20 Laser Unit (1) Disconnect the wiring of the Fuser develop motor flat cable from the Develop FFC holder. (2) Release the two Hooks to remove the Develop FFC holder from the Upper cable rack. Develop FFC holder Hook Hook Upper cable rack <Left side>...
  • Page 210 (5) Remove the two Taptite cup S M3x6 SR screws to remove the Top beam from the Base frame unit. Taptite cup S M3x6 SR Top beam Base frame unit <Front> Fig. 3-68 (6) Remove the five Taptite cup S M3x6 SR screws to remove the four Scanner holders. Taptite cup S Taptite cup S M3x6 SR M3x6 SR...
  • Page 211 (7) Disconnect the Connector (CN8) and two Flat cables from the Laser unit to remove the Laser unit from the Base frame unit. Note: After disconnecting flat cables, check that each cable is not damaged at its end or shortcircuited. Laser unit Base frame unit Laser unit-Engine...

  • Page 212: Develop Release Motor

    9.21 Develop Release Motor (1) Remove the two Taptite bind S M3x6 screws. Top drive ASSY Taptite bind S M3x6 Develop release motor <Left side> Fig. 3-72 (2) Rotate the Develop release motor counterclockwise to release the Hook to remove the Develop release motor from the Top drive ASSY.

  • Page 213: Front Cover Sensor

    9.22 Front Cover Sensor (1) Disconnect the wiring of the Front cover sensor from the Panel cable rack. (2) Release the two Hooks to remove the Front cover sensor. Hook Hook Front cover sensor Panel cable rack <Left side> Fig. 3-74 Harness routing: Refer to “...

  • Page 214: Top Drive Assy

    9.23 Top Drive ASSY (1) Remove the Main insulation sheet from the Top drive ASSY. Top drive ASSY Main insulation sheet <Left side> Fig. 3-75 Assembling Note: When assembling the Main insulation sheet, be careful to insert the “A” into the rear side of the Top drive ASSY.
  • Page 215 (2) Disconnect cables from the Lower cable rack. (3) Release the four Hooks to remove the Lower cable rack from the Top drive ASSY. <Left side> Hook Lower cable rack Hook Top drive ASSY Hook Fig. 3-77 (4) Disconnect cables from the PF line holder. (5) Release the three Hooks to remove the PF line holder from the Top drive ASSY.
  • Page 216 (6) Disconnect cables from the Panel cable rack. (7) Remove the Taptite cup S M3x6 SR screw. (8) Release the four Hooks to remove the Panel cable rack from the Top drive ASSY. Top drive ASSY <Left side> Hook Panel cable rack Hook Hook Taptite cup S M3x6 SR...
  • Page 217 (10) Remove the nine Taptite cup S M3x6 SR screws and Taptite bind B M4x12 screw from the Top drive ASSY. Top drive ASSY Base frame unit Taptite cup S M3x6 SR Taptite bind B M4x12 FG wire under bar rear FG wire under bar rear Base frame unit Hook...
  • Page 218 (11) Remove the Forced develop release link from the Develop forced release part. (12) Release the two Hooks to remove the Top drive ASSY from the Base frame unit. Forced develop release link Base frame unit Hook Develop forced release part Hook Top drive ASSY <Left side>...

  • Page 219: Forced Develop Release Link

    9.24 Forced Develop Release Link (1) Remove the Forced develop release link from the Forced develop release cam. Forced develop release link Forced develop release cam Forced develop release cam Forced develop release link <Left side> Fig. 3-84 3-71 Confidential...

  • Page 220: Drum Drive Motor

    9.25 Drum Drive Motor (1) Remove the two Drum coupling gear Z52 from the Top drive ASSY. Drum coupling gear Z52 Drum coupling gear Z52 Top drive ASSY Fig. 3-85 Gear position: Refer to “ Top drive ASSY.” (2) Remove the two Drum idle gear Z64 from the Top drive ASSY. Drum idle gear Z64 Top drive ASSY Fig.
  • Page 221 (3) Remove the Collar 6 from the Drum idle gear Z64 first. Drum idle gear Z64 first Collar 6 Fig. 3-87 (4) Remove the Drum idle gear Z64 first from the Top drive ASSY. Drum idle gear Z64 first Top drive ASSY Fig.
  • Page 222 (5) Remove the three Screw bind M3x4 screws to remove the Drum drive motor from the Top drive ASSY. Screw bind M3x4 Top drive ASSY Drum drive motor Fig. 3-89 Assembling Note: Align the phase of the Drum idle gear Z64, Drum idle gear Z64 first, and Drum coupling gear Z52.

  • Page 223: Drum Position Sensor Pcb Assy

    9.26 Drum Position Sensor PCB ASSY (1) Remove the Drum coupling gear Z52 from the Top drive ASSY. Drum coupling gear Z52 Top drive ASSY Drum coupling gear Z52 Fig. 3-90 Gear position: Refer to “ Top drive ASSY.” Note: Be sure to align the phase before removing the gear.

  • Page 224: Registration Solenoid Assy

    9.27 Registration Solenoid ASSY (1) Disconnect the wiring of the Registration solenoid ASSY. (2) Remove the Taptite cup S M3x6 SR screw to remove the Registration solenoid ASSY and Registration solenoid spring from the Top drive ASSY. Taptite cup S M3x6 SR Registration solenoid spring Registration solenoid ASSY Top drive ASSY...

  • Page 225: Develop Release Sensor Pcb Assy/Mono Solenoid Assy

    9.28 Develop Release Sensor PCB ASSY/Mono Solenoid ASSY (1) Remove the three Taptite cup S M3x6 SR screws to remove the Top drive cover from the Top drive ASSY. Taptite cup S M3x6 SR Taptite cup S M3x6 SR Top drive cover Top drive ASSY Fig.
  • Page 226 (4) Remove the Gear Z63-30 from the Top drive ASSY. Gear Z63-30 Top drive ASSY Fig. 3-95 Gear position: Refer to “ Top drive ASSY.” (5) Remove the Taptite cup S M3x6 SR screw to remove the Mono solenoid ASSY and Mono solenoid spring from the Top drive ASSY.

  • Page 227: Fuser Develop Motor Assy

    9.29 Fuser Develop Motor ASSY (1) Remove the four Taptite cup S M3x6 SR screws to remove the Fuser Develop Motor ASSY from the Top drive ASSY. Taptite cup S M3x6 SR Taptite cup S M3x6 SR Fuser Develop Motor ASSY Top drive ASSY Fig.

  • Page 228: Pf Plate Assy/T1 Solenoid Assy

    9.30 PF Plate ASSY/T1 Solenoid ASSY (1) Remove the three Taptite bind B M4x12 screws and Taptite cup S M3x6 SR screw. Release the FG wire under bar to remove the PF plate ASSY from the PF cleaner drive ASSY. <Left side>...
  • Page 229 (2) Disconnect the wiring of the PF cleaner drive ASSY. (3) Remove the two Taptite bind B M4x12 screws to remove the PF cleaner drive ASSY from the Base frame unit. PF cleaner drive ASSY Taptite bind B M4x12 <Left side> Base frame unit Taptite bind B M4x12 Fig.

  • Page 230: Toner/New Sensor Pcb Assy

    9.31 Toner/New Sensor PCB ASSY (1) Release the two Hooks to remove the TE sensor protect film from the Toner reset holder. Toner reset holder <Left side> Hook TE sensor protect film Fig. 3-101 (2) Release the six Hooks to remove the Toner/New sensor PCB ASSY from the Toner reset holder.

  • Page 231: Internal Temperature Thermistor

    9.32 Internal Temperature Thermistor (1) Remove the Internal temperature thermistor from the Main body. Internal temperature thermistor Main body <Left side> Fig. 3-103 Assembling Note: - Insert the tip of the Internal temperature thermistor firmly into the Insertion hole until it reaches the end of the Hole.

  • Page 232: Fuser Fan

    9.33 Fuser Fan (1) Disconnect the Connector (CN4) from the High-voltage power supply PCB ASSY. High-voltage power supply PCB ASSY Connector <Right side> Fuser fan Fig. 3-105 (2) Pull out the Fuser fan from the Paper eject ASSY by slightly rotating it in the arrow direction in the figure below.
  • Page 233 Assembling Note: When assembling the Fuser fan, be sure to assemble it in a way that the label side faces out. Paper eject ASSY Fuser fan Label <Right side> Fig. 3-107 3-85 Confidential...

  • Page 234: Paper Eject Assy

    9.34 Paper Eject ASSY (1) Disconnect the wiring of the harness from the High-voltage power supply PCB ASSY. (2) Remove the five Taptite cup S M3x6 SR screws to remove the Paper eject ASSY from the Base frame unit. Taptite cup S M3x6 SR Paper eject ASSY Taptite cup S M3x6 SR Base frame unit...

  • Page 235: Filter Assy

    9.35 Filter ASSY (1) Remove the Toner filter ASSY from the Paper eject ASSY. Paper eject ASSY Toner filter ASSY Fig. 3-109 (2) Remove the Taptite bind B M4x12 screw to remove the Eject duct from the Paper eject ASSY. Eject duct Paper eject ASSY Taptite bind B M4x12...
  • Page 236 (3) Remove the Filter ASSY from the Eject duct. Eject duct Filter ASSY Fig. 3-111 3-88 Confidential...

  • Page 237: Paper Eject Motor

    9.36 Paper Eject Motor (1) Remove the two Taptite bind S M3x6 screws to remove the Paper eject motor from the Paper eject ASSY. Paper eject ASSY Paper eject motor Taptite bind S M3x6 Fig. 3-112 Harness routing: Refer to “...

  • Page 238: Back Cover Sensor Assy

    9.37 Back Cover Sensor ASSY (1) Release the two Hooks to remove the Back cover sensor ASSY from the Paper eject ASSY. Paper eject ASSY Hook Back cover sensor ASSY Hook Back cover sensor ASSY Fig. 3-113 Harness routing: Refer to “...

  • Page 239: Power Fan

    9.38 Power Fan (1) Disconnect the Connector (CN5) from the High-voltage power supply PCB ASSY. Connector Power fan High-voltage power supply PCB ASSY <Right side> Fig. 3-114 (2) Remove the Power fan from the Base frame unit. <Right side> Power fan Base frame unit Label Fig.
  • Page 240 Assembling Note: When assembling the Power fan, be sure to assemble it in a way that the label side faces out. <Right side> Power fan Base frame unit Label Fig. 3-116 3-92 Confidential...

  • Page 241: Low-Voltage Power Supply Unit

    9.39 Low-voltage Power Supply Unit (1) Remove the two Pins to remove the Back flapper ASSY from the Low-voltage power supply cover. Low-voltage power supply cover Back flapper ASSY <Back side> Fig. 3-117 (2) Release the two Hooks to remove the Switch holder from the Base frame unit. <Right side>...
  • Page 242 (3) Remove the Taptite flat B M3x10 screw to remove the AC inlet from the Low-voltage power supply unit. Low-voltage power supply unit <Right side> Taptite flat B M3x10 AC inlet Fig. 3-119 (4) Remove the screw “a” of the Screw pan (S/P washer) M4x8 from the Low-voltage power supply unit to remove the ground terminal.
  • Page 243 (5) Remove the two Taptite cup S M3x8 screws and two Taptite cup B M3x12 screws to remove the Low-voltage power supply unit from the Base frame unit. Base frame unit Taptite cup S M3x8 Taptite cup B M3x12 Low-voltage power supply unit Taptite cup S M3x8 <Back side>...

  • Page 244: Paper Eject Sensor Pcb Assy

    9.40 Paper Eject Sensor PCB ASSY (1) Release the Hook to remove the Paper eject sensor PCB ASSY from the Low-voltage power supply cover. Paper eject sensor PCB ASSY Low-voltage power supply cover Hook A view <A view> Hook Paper eject sensor PCB ASSY Fig.

  • Page 245: Low-Voltage Power Supply Pcb Assy/Inlet Harness Assy

    9.41 Low-voltage Power Supply PCB ASSY/Inlet Harness ASSY (1) Disconnect the Harness from Hooks. (2) Remove the four Taptite pan (washer) B M4x12DA screws, one Screw pan (S/P washer) M4x8 screw, and the Low-voltage power supply ground plate, and then remove the Low-voltage power supply plate from the Low-voltage power supply cover.
  • Page 246 (4) Disconnect the Connector (CN2) from the Low-voltage power supply PCB ASSY. CN102 CN103 CN101 Low-voltage power supply PCB ASSY Fig. 3-125 (5) Release the two Hooks to remove the Power switch from the Power switch holder. Power switch holder Power switch Hook Hook...
  • Page 247 (6) Remove the four Screw cup M3x6 screws to remove the Low-voltage power supply PCB ASSY from the Low-voltage power supply plate. Screw cup M3x6 Screw cup M3x6 Low-voltage power supply plate Low-voltage power supply PCB ASSY Fig. 3-127 3-99 Confidential...

  • Page 248: Cleaner Pinch Roller Holder

    9.42 Cleaner Pinch Roller Holder (1) Remove the two Pins and release the one Hook to remove the Front chute flapper and two Flapper springs from the Low-voltage power supply unit. Hook Flapper spring Front chute flapper Flapper spring Low-voltage power supply unit Fig.
  • Page 249 (3) Hold down the Cleaner spring of the Cleaner pinch roller holder to remove the Cleaner pinch roller ASSY. (4) Remove the other three Cleaner pinch roller ASSY in the same way. Cleaner pinch roller ASSY Cleaner spring Cleaner spring Cleaner pinch roller holder Fig.

  • Page 250: Registration Mark Sensor Holder Assy/Shutter Solenoid

    9.43 Registration Mark Sensor Holder ASSY/ Shutter Solenoid (1) Disconnect the Connector (CN8) from the High-voltage power supply PCB ASSY. Registration mark sensor holder ASSY Connector High-voltage power supply PCB ASSY Fig. 3-131 (2) Remove the Core from the Harness of the Registration mark R PCB and Belt temperature sensor.
  • Page 251 (3) Remove the two Taptite bind B M3x10 screws to remove the Registration mark sensor holder ASSY from the Base frame unit. Registration mark sensor holder ASSY Taptite bind B M3x10 <Back side> Base frame unit Fig. 3-133 (4) Remove the Taptite bind B M3x10 screw to remove the Shutter solenoid from the Registration mark sensor holder ASSY.
  • Page 252 Assembling Note: Be sure to firmly insert the tip of the Pin of the Shutter solenoid into "A" of the Registration mark sensor shutter. “A” Registration mark sensor shutter Shutter solenoid Fig. 3-135 Harness routing: Refer to “ Registration Mark Sensor Holder ASSY” 3-104 Confidential...

  • Page 253: Mp Paper Empty/Registration Front Sensor Pcb Assy

    9.44 MP Paper Empty/Registration Front Sensor PCB ASSY (1) Press “A” to release the Hook and then remove the MP upper frame cover from the MP upper cover ASSY. “A” MP upper frame cover Hook MP upper cover ASSY Fig. 3-136 (2) Remove the MP lift arm B from the MP upper cover ASSY.
  • Page 254 (3) Release the Hook to remove the MP holder bush from the MP upper cover ASSY. Hook MP holder bush MP upper cover ASSY Fig. 3-138 (4) Remove the MP roller holder ASSY from the MP upper cover ASSY. MP roller holder ASSY MP upper cover ASSY Fig.
  • Page 255 (5) Remove the Registration gear from the Base frame unit. Registration gear Base frame unit Fig. 3-140 Gear position: Refer to “ PF ASSY.” (6) Remove the Pinch roller drive gear from the Base frame unit. Pinch roller drive gear Base frame unit Fig.
  • Page 256 (7) Release the Hook to remove the Registration/Pinch roller gear bush from the Base frame unit. Registration/Pinch roller gear bush Hook Base frame unit Fig. 3-142 Gear position: Refer to “ PF ASSY.” (8) Remove the two Taptite bind B M3x10 screws. Slide the MP drive shaft as shown in the figure.
  • Page 257 (9) Release the five Hooks to remove the Sensor cover MP from the MP upper cover ASSY. MP upper cover ASSY Hook Hook Hook Sensor cover MP Fig. 3-144 (10) Release the two Hooks to remove the MP paper empty actuator A ASSY from the MP upper cover ASSY.
  • Page 258 (11) Release the Hook to remove the MP paper empty actuator B from the MP upper cover ASSY. MP upper cover ASSY Align here MP paper empty actuator B Hook Align here Fig. 3-146 (12) Release the Hook to remove the Separation R shaft bush from the MP drive shaft. Separation R shaft bush MP drive shaft Hook...
  • Page 259 (13) Remove the MP registration front actuator spring from the MP registration front actuator. MP registration front actuator spring MP registration front actuator MP upper cover ASSY Hook Fig. 3-148 (14) Take out the MP drive shaft, and then remove the MP registration front actuator from the MP upper cover ASSY.
  • Page 260 (15) Disconnect the wiring of the MP paper empty/registration front sensor PCB ASSY. (16) Remove the Taptite bind B M3x8 screw, and then remove the MP paper empty/ registration front sensor PCB ASSY from the MP upper cover ASSY. Taptite bind B M3x8 MP paper empty/registration front sensor PCB ASSY MP upper cover ASSY...

  • Page 261: Pf Assy

    9.45 PF ASSY (1) Push the T1 lift arm to the back to remove “B” of the Roller holder ASSY from “A” of the T1 lift arm. Front Roller holder ASSY PF ASSY Roller holder ASSY T1 lift arm “B” T1 lift arm “A”...
  • Page 262 Assembling Note: Align the Shaft of the Roller holder ASSY to the hole of the PF ASSY and insert it into the hole. PF ASSY PF ASSY Roller holder ASSY Shaft Hole Fig. 3-153 (4) Move the T1 lift arm in the direction of the arrow 4b as bending it in the direction of the arrow 4a to remove it from the Boss of the PF ASSY.
  • Page 263 (5) Remove the Shoulder screw from the PF ASSY. (6) Remove the two Taptite bind B M4x12 screws, then shift the PF ASSY to the right, and remove it from the Base frame unit. Base frame unit Shoulder screw PF ASSY Taptite bind B M4x12 Fig.

  • Page 264: T1 Registration Front/Rear Sensor Pcb Assy

    9.46 T1 Registration Front/Rear Sensor PCB ASSY (1) Disconnect the wiring of the T1 registration front/rear sensor PCB ASSY. (2) Remove the Taptite bind B M3x10 screw to remove the T1 registration front/rear sensor PCB holder from the PF ASSY. Taptite bind B M3x10 T1 registration front/rear sensor PCB holder...

  • Page 265: Mp Sector Solenoid

    9.47 MP Sector Solenoid (1) Disconnect the wiring of the MP sector solenoid. (2) Remove the Taptite bind B M3x8 screw. Remove the MP sector solenoid and Solenoid spring MP from the PF ASSY. PF ASSY Taptite bind B M3x8 Solenoid spring MP MP sector solenoid Fig.

  • Page 266: T1 Paper Edge Sensor Pcb Assy/T1 Paper Edge Actuator/T1 Paper Edge Actuator Spring

    9.48 T1 Paper Edge Sensor PCB ASSY/ T1 Paper Edge Actuator/ T1 Paper Edge Actuator Spring (1) Remove the three Taptite bind B M3x10 screws of the Pinch roller shaft sub ASSY from the MP drive frame. (2) Remove “A” of the Registration roller ground wire. (3) Remove the MP drive frame from the PF ASSY.
  • Page 267 (5) Remove the T1 paper edge actuator spring from the Hook of the PF ASSY and the Hook of the T1 paper edge actuator. Hook T1 paper edge actuator spring Hook PF ASSY T1 paper edge actuator Fig. 3-162 (6) Take out the T1 drive shaft gear Z17M07 from the PF ASSY, and then remove the T1 paper edge actuator.
  • Page 268 (7) Disconnect the wiring of the T1 paper edge sensor PCB ASSY. (8) Release the three Hooks to remove the T1 paper edge sensor PCB ASSY from the PF ASSY. T1 paper edge sensor PCB ASSY PF ASSY Hook Fig. 3-164 Harness routing: Refer to “...

  • Page 269: Cleaner Drive Gear 15

    9.49 Cleaner Drive Gear 15 (1) Press the Hook of the Cleaner drive gear 15, and then remove it from the Main body. Hook Cleaner drive gear 15 Main body Cleaner drive gear 15 Fig. 3-165 3-121 Confidential...

  • Page 270: High-Voltage Power Supply Pcb Assy

    9.50 High-voltage Power Supply PCB ASSY (1) Remove the High-voltage power supply protect film from the Base frame unit. High-voltage power supply protect film <Right side> Base frame unit Fig. 3-166 (2) Remove the four Spacers from the Base frame unit. Spacer Spacer Base frame unit...
  • Page 271 (3) Disconnect the two Connectors (CN1, CN2) from the High-voltage power supply PCB ASSY. High-voltage power supply PCB ASSY Fig. 3-168 (4) Remove the two Taptite cup S M3x6 SR screws. Taptite cup S M3x6 SR High-voltage power supply PCB ASSY Fig.
  • Page 272 (5) Release the eight Hooks to remove the High-voltage power supply PCB ASSY from the Base frame unit. (6) Disconnect the two Connectors (CN6, CN7). Base frame unit High-voltage power supply PCB ASSY High-voltage power supply PCB ASSY Hook <Right side> Hook Hook Hook...

  • Page 273: Waste Toner Sensor

    9.51 Waste Toner Sensor (1) Release the two Hooks to remove the Waste toner sensor cover from the Base frame unit. Waste toner sensor cover Hook Base frame unit Hook <Front> Fig. 3-172 (2) Release the three Hooks to remove the Waste toner sensor from the Base frame unit. Base frame unit Waste toner sensor Hook...
  • Page 274 (3) Disconnect the Connector from the Waste toner sensor. Connector Waste toner sensor Fig. 3-174 3-126 Confidential...

  • Page 275: Air Duct Cover/Blower

    9.52 Air Duct Cover/Blower (1) Release the four Hooks to remove the Air duct cover from the Base frame unit. <Right side> Hook Hook Base frame unit Air duct cover Fig. 3-175 (2) Disconnect the wiring of the Blower. (3) Remove the Blower from the Base frame unit. <Right side>...
  • Page 276 Assembling Note: When assembling the Blower, be sure to assemble it in a way that the label side faces up. <Right side> Label Base frame unit Blower Fig. 3-177 3-128 Confidential...

  • Page 277: Disassembly Procedure (Lt-300Cl)

    10. DISASSEMBLY PROCEDURE (LT-300CL) 10.1 T2 Paper Tray Unit (1) Take out the T2 paper tray unit from the main body. T2 paper tray unit Main body Fig. 3-178 (2) Release the two Hooks of the T2 separation pad ASSY to remove them in the upward direction.
  • Page 278 (3) Remove the T2 separation pad spring from the T2 separation pad ASSY. T2 separation pad ASSY T2 separation pad spring Fig. 3-180 3-130 Confidential...

  • Page 279: T2 Separation Roller Assy/T2 Paper Feed Roller Assy 1

    10.2 T2 Separation Roller ASSY/T2 Paper Feed Roller ASSY 1 (1) Release the Hook and slide the T2 separation roller ASSY in the direction of the arrow 1. (2) Remove the T2 separation roller ASSY in the direction of the arrow 2b as rotating it in the direction of the arrow 2a.
  • Page 280 (3) Release the Hooks to remove the T2 paper feed roller ASSY 1 from the T2 paper feed shaft. T2 paper feed frame unit T2 paper feed roller ASSY 1 Hook T2 paper feed shaft Fig. 3-183 3-132 Confidential...

  • Page 281: T2 Cover Rear

    10.3 T2 Cover Rear (1) Remove the two Taptite cup S M3x10 SR screws from the T2 cover rear. Taptite cup S M3x10 SR T2 cover rear Taptite cup S M3x10 SR Fig. 3-184 (2) Remove the two Pins to remove the T2 cover rear from the Main body. T2 cover rear Main body Fig.

  • Page 282: T2 Cover Left

    10.4 T2 Cover Left (1) Remove the two Taptite cup S M3x6 SR screws from the T2 cover left. T2 cover left Taptite cup S M3x6 SR Taptite cup S M3x6 SR Fig. 3-186 (2) Remove the one Pin, and then release the two Hooks at the top. (3) Release the two Hooks at the bottom to remove the T2 cover left from the T2 frame L unit.

  • Page 283: T2 Cover Right

    10.5 T2 Cover Right (1) Remove the two Taptite cup S M3x6 SR screws from the T2 cover right. T2 cover right Taptite cup S M3x6 SR Taptite cup S M3x6 SR Fig. 3-188 (2) Remove the one Pin, and then release the two Hooks at the top. (3) Release the three Hooks at the bottom to remove the T2 cover right from the T2 frame L unit.

  • Page 284: T2 Relay Pcb Assy

    10.6 T2 Relay PCB ASSY (1) Disconnect the all Connectors from the T2 Relay PCB ASSY. (Not used) (T2 paper edge sensor) (T2 plate-up detection sensor) (T2 connector) T2 Relay PCB ASSY (T2 solenoid) (T2 plate-up motor) Fig. 3-190 (2) Remove the Taptite cup S M3x6 SR screw to remove the T2 Relay PCB ASSY from the T2 frame L unit.

  • Page 285: T2 Solenoid Assy

    10.7 T2 Solenoid ASSY (1) Remove the Taptite cup S M3x6 SR screw to remove the T2 solenoid holder ASSY from the T2 frame L unit. T2 solenoid holder ASSY T2 frame L unit Taptite cup S M3x6 SR Fig. 3-192 (2) Remove the Screw flanged M3x3.5 screw to remove the T2 solenoid ASSY and T2 solenoid spring MP from the T2 solenoid holder.

  • Page 286: Collar 6

    10.8 Collar 6 (1) Remove the two pieces of the Collar 6 from the Fittings shaft. Collar 6 Fittings shaft Fig. 3-194 3-138 Confidential...

  • Page 287: T2 Paper Feed Frame Unit

    10.9 T2 Paper Feed Frame Unit (1) Remove the Clutch spring from the Clutch arm ASSY. Clutch arm ASSY Clutch spring Clutch arm ASSY Fig. 3-195 (2) Release the Hook to remove the Gear 45/40 from the T2 frame L unit. Gear 45/40 T2 frame L unit Hook...
  • Page 288 (3) Remove the Collar 6 from the Clutch arm ASSY. Collar 6 Clutch arm ASSY Fig. 3-197 (4) Remove the Clutch arm ASSY from the T2 frame L unit. T2 frame L unit Clutch arm ASSY Fig. 3-198 3-140 Confidential...
  • Page 289 (5) Remove the five Taptite cup S M3x6 SR screws to remove the T2 beam F ASSY from the T2 frame L unit. Taptite cup S M3x6 SR Taptite cup S M3x6 SR Taptite cup S M3x6 SR T2 beam F ASSY T2 frame L unit Fig.
  • Page 290 (7) Remove the Retaining ring E3 from the F roller, and then remove the FR bush TR. F roller FR bush TR Retaining ring E3 Fig. 3-201 (8) Remove the Lift spring from the Hook of the Lift lever A. (9) Remove the F roller from the T2 frame L unit in the directions of the arrows 9a, 9b, and 9c in this order.
  • Page 291 Assembling Note: When assembling the F roller, be sure to assemble it in a way that the Rib of the T2 paper feed frame unit comes between “A” and “B” of the Lift lever B, and the lever of the T2 paper feed holder unit comes in front of “B”. Lift lever B "B"...
  • Page 292 (11) Release the Hook to remove the Gear 33 from the T2 frame L unit. Gear 33 T2 frame L unit Hook Fig. 3-205 (12) Remove the Extension spring from the Spring hook. (13) Release the Hook to remove the Gear 46/55 from the T2 frame L unit. T2 frame L unit Hook Gear 46/55...
  • Page 293 (14) Remove the Gear 46 from the T2 frame L unit. T2 frame L unit Gear 46 Fig. 3-207 (15) Turn the T2 frame L unit upside down. (16) Remove the two Taptite cup S M3x6 SR screws from the T2 beam front. Taptite cup S M3x6 SR T2 beam front Fig.
  • Page 294 (17) Return the T2 frame L unit to the original position. (18) Remove the two Taptite cup S M3x6 SR screws from the T2 beam rear. T2 beam rear Taptite cup S M3x6 SR Fig. 3-209 (19) Remove the two Taptite cup S M3x6 SR screws from the T2 beam rear. T2 beam rear Taptite cup S M3x6 SR Fig.
  • Page 295 (20) Remove the Taptite bind B M4x10 screw and Bush. T2 frame L unit Taptite bind B M4x10 Bush Fig. 3-211 (21) Remove the T2 paper feed frame unit from the T2 frame L unit in the direction of the arrows 21a and 21b in this order.

  • Page 296: Chapter 4 Adjustments And Updating Of Settings, Required After Parts Replacement

    CHAPTER 4 ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT Confidential...
  • Page 297 CHAPTER 4 ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT This chapter describes adjustments and updating of settings, which are required if the main PCB ASSY and some other parts have been replaced. This chapter also covers how to update the firmware. CONTENTS 1.
  • Page 298 5. IF YOU REPLACE THE LOW-VOLTAGE POWER SUPPLY PCB ASSY .4-9 5.1 Reset of Irregular Power Supply Detection Counter........... 4-9 6. IF YOU REPLACE THE DRUM DRIVE MOTOR ........4-10 Confidential...

  • Page 299: If You Replace The Main Pcb Assy

    Copy it into the “hl4000” folder that has been created in the C drive. (6) The Brother maintenance USB printer driver (Maintenance_Driver.zip) Copy it into the “hl4000” folder that has been created in the C drive. Extract the copied file.

  • Page 300: Rewriting The Firmware (Sub Firmware, Main Firmware)

    “Brother Maintenance USB Printer.” (4) Drag and drop a program file that you want to rewrite (for instance, LZXXXX_$.upd) onto the Brother Maintenance USB Printer icon in the screen shown above. Note: After rewriting Sub firmware or Main firmware is completed, the printer returns to the ready state.

  • Page 301: Rewriting The Firmware Using Usb Flash Memory

    1.1.3 Rewriting the firmware using USB flash memory If you save the program files in the USB flash memory drive and plug it into the USB direct interface, you can rewrite the firmware. Note: - You cannot write the firmware using USB flash memory in the Deep Sleep mode. Press the OK button to clear the Deep Sleep mode before rewriting the firmware.

  • Page 302: Initialization Of Eeprom Of Main Pcb Assy (Maintenance Mode: Code 01)

    (2) Double-click the brusbsn.exe file which has been copied in the “hl4000” folder to start. (3) Click the C-Laser 10Model. (4) In Port on the brusbsn screen, select the port number assigned to the Brother Maintenance USB Printer. If the port number is unknown, follow steps below.
  • Page 303 The Brother Maintenance USB Printer Properties window appears as shown below. 4) Click the Ports tab. In this example, the port number assigned to the Brother Maintenance USB Printer is USB001. (5) Enter the serial number (the fifteen digits) of the printer into the box on the “Serial No”.

  • Page 304: Sensitivity Adjustment Of Density Sensor (Maintenance Mode: Code 72)

    Sensitivity Adjustment of Density Sensor (Maintenance Mode: Code 72) Make sensitivity adjustments of the density sensor in accordance with “1.4.18 Sensitivity adjustment of density sensor” in Chapter Performing the Developing Bias Voltage Correction (Maintenance Mode: Code 83) Perform developing bias voltage correction in accordance with “1.4.25 Developing bias voltage correction”...

  • Page 305: Sensitivity Adjustment Of Density Sensor (Maintenance Mode: Code 72)

    IF YOU REPLACE THE HIGH-VOLTAGE POWER SUPPLY PCB ASSY ■ What to do when replacing the laser unit - Sensitivity adjustment of density sensor (Maintenance mode: code 72) - Performing the developing bias voltage correction (Maintenance mode: code 83) - Performing the adjustment of inter-color position alignment (Maintenance mode: code 66) Sensitivity Adjustment of Density Sensor (Maintenance Mode: Code 72) Make sensitivity adjustments of the density sensor in accordance with...

  • Page 306: If You Replace The Laser Unit

    IF YOU REPLACE THE LASER UNIT ■ What to do when replacing the laser unit - Sensitivity adjustment of density sensor (Maintenance mode: code 72) - Performing the developing bias voltage correction (Maintenance mode: code 83) - Performing the adjustment of inter-color position alignment (Maintenance mode: code 66) Sensitivity Adjustment of Density Sensor (Maintenance Mode: Code 72) Make sensitivity adjustments of the density sensor in accordance with...

  • Page 307: If You Replace The Low-Voltage Power Supply Pcb Assy

    LCD. (2) Connect the PC to the printer with the USB cable. (3) Start the “FILEDG32.EXE” and select the “Brother Maintenance USB Printer”. (4) Click the “Brother Maintenance USB Printer” icon to select. Drag the SQWAVE.PJL and drop it. Confidential...

  • Page 308: If You Replace The Drum Drive Motor

    IF YOU REPLACE THE DRUM DRIVE MOTOR <Procedures> - Alignment of gear phase When replacing the drum drive motor, the gears listed below are removed. Align the phase of each gear in accordance with the table and figure given below when mounting these gears so that the phases of each drum is aligned.
  • Page 309 (2) When mounting LY0198001 Drum idle gear Z64 and LY0199001 Drum idle gear Z64 first of Nos. 3 to 5, mount them by aligning their phases as shown in the figure below. Top drive ASSY Drum idle gear Z64 Drum idle gear Z64 first Drum idle gear Z64 Mark Mark...
  • Page 310 (3) When assembling Nos. 6 to 9 LY0196001 Drum coupling gear Z52, be sure to assemble them by aligning the phase as shown in the figure below. - Align the mark ( ) of the Drum coupling gear Z52 of No. 6 with the mark ( ) of the Drum idle gear Z64-26.

  • Page 311: Chapter 5 Service Functions

    CHAPTER 5 SERVICE FUNCTIONS Confidential...

  • Page 312: Maintenance Mode

    CHAPTER 5 SERVICE FUNCTIONS Describes the maintenance mode which is exclusively designed for the purpose of checking the settings and adjustments using the buttons on the control panel. This chapter also covers not-disclosed-to-users function menus, which activate settings and functions or reset the parts life.
  • Page 313 1.4.24 Error code indication (Function code 82)............5-47 1.4.25 Developing bias voltage correction (Function code 83)......... 5-48 1.4.26 Exit from the maintenance mode (Function code 99)........5-49 2. OTHER SERVICE FUNCTIONS...............5-50 2.1 Service Function Menus Enabled by Pressing Button (s) When Turning the Printer On..................

  • Page 314: Maintenance Mode

    MAINTENANCE MODE The maintenance mode is exclusively designed for the checking, setting and adjustments of the printer by using the buttons on the control panel. You can perform operational checks of sensors, perform a print test, display the log information or error codes, and modify the worker switch (WSW).

  • Page 315: List Of Maintenance-Mode Functions

    List of Maintenance-mode Functions Function code Function Refer to: EEPROM parameter initialization 1.4.1(5-3) Monochrome image quality test pattern 1.4.2(5-4) Worker switch (WSW) setting 1.4.3 [1](5-5) Printout of worker switch (WSW) data 1.4.3 [2](5-7) Operational check of LCD 1.4.4(5-8) Operational check of control panel button 1.4.5(5-9) Software version check 1.4.6(5-10)

  • Page 316: Detailed Description Of Maintenance-Mode Functions

    Detailed Description of Maintenance-mode Functions 1.4.1 EEPROM parameter initialization (Function code 01, 91) <Function> This function initializes the setting values of the operation parameters, user switches, and worker switches (WSW) registered in the EEPROM. Entering function code 01 initializes almost all of the EEPROM areas, but entering 91 does not initialize some areas, as listed below.

  • Page 317: Monochrome Image Quality Test Pattern (Function Code 09)

    1.4.2 Monochrome image quality test pattern (Function code 09) <Function> This function allows you to print various monochrome test patterns and check the quality and if there is any image loss. <Operating procedure> (1) Press the button to display “MAINTENANCE 09” on the LCD in the initial state of the maintenance mode.

  • Page 318: Worker Switch (Wsw) Setting And Printout (Function Code 10, 11)

    1.4.3 Worker switch (WSW) setting and printout (Function code 10, 11) [1] Worker switch setting (Function code 10) The printer incorporates the following worker switch functions which may be activated with the procedures using the buttons on the control panel. The worker switches have been set at the factory in conformity to the codes of each country.
  • Page 319 <Operating procedure>10 (1) Press the button to display “MAINTENANCE 10” on the LCD in the initial state of the maintenance mode. Then, press the OK button. (2) The printer displays “WSW00” on the LCD and becomes ready to accept a worker switch number.

  • Page 320: Operating Procedure

    [2] Printout of worker switch data (Function code 11) <Function> The printer prints out the setting items of the worker switches and their contents specified. <Operating procedure> (1) Press the button to display “MAINTENANCE 11” on the LCD in the initial state of the maintenance mode.

  • Page 321: Operational Check Of Lcd (Function Code 12)

    1.4.4 Operational check of LCD (Function code 12) <Function> This function allows you to check whether the LCD on the control panel works normally. <Operating procedure> (1) Press the button to display “MAINTENANCE 12” on the LCD in the initial state of the maintenance mode.

  • Page 322: Operational Check Of Control Panel Button (Function Code 13)

    1.4.5 Operational check of control panel button (Function code 13) <Function> This function allows you to check if the buttons on the control panel work properly. <Operating procedure> (1) Press the button to display “MAINTENANCE 13” on the LCD in the initial state of the maintenance mode.

  • Page 323: Software Version Check (Function Code 25)

    1.4.6 Software version check (Function code 25) <Function> This function allows you to check the management information of the software programs such as version information, check sum. <Operating procedure> (1) Press the button to display “MAINTENANCE 25” on the LCD in the initial state of the maintenance mode.

  • Page 324: One Push Demo" Setting (Function Code 28)

    1.4.7 “One Push Demo” setting (Function code 28) <Function> The One Push Demo function is to implement demo printing by pressing the Go button, which is mainly used for sales promotion at the shop. It is disabled if printing from a computer even once.

  • Page 325: Operational Check Of Sensors (Function Code 32)

    1.4.8 Operational check of sensors (Function code 32) <Function> This function allows you to check each of the sensors. <Operating procedure> (1) Press the button to display “MAINTENANCE 32” on the LCD in the initial state of the maintenance mode. Then, press the OK button. (2) If the sensing status are as listed below, the LCD will show “C1C2L2T2 ”...
  • Page 326 Sensing status Sensors (OK/NG of temperature/humidity) ° External temperature/humidity sensor C/NG External temperature/humidity sensor XX %/NG ° Internal temperature sensor C/NG ° Belt temperature sensor C/NG Note: If the sensor detects the abnormal value, the printer displays “NG” on the LCD. (3) Change the detecting conditions to check that the indication on the LCD changes according to the sensor status.
  • Page 327 Toner/New sensor PCB ASSY MP paper empty sensor MP registration front sensor New toner sensor (Cyan) Toner sensor (Cyan) New toner sensor (Magenta) MP upper cover ASSY Toner sensor (Magenta) New toner sensor (Yellow) Toner sensor (Yellow) Waste toner sensor New toner sensor (Black) Toner sensor (Black) MP paper empty/registration front...

  • Page 328: Lan Connection Status Display (Function Code 33)

    1.4.9 LAN connection status display (Function code 33) <Function> This function allows you to check the status of the wired LAN connection. The display items are shown in the table below. LAN connection status Active 100B-FD 100B-FD Active 100B-HD 100B-HD Active 10B-FD 10B-FD Active 10B-HD...

  • Page 329: Printout Of Eeprom Log (Function Code 40)

    1.4.10 Printout of EEPROM log (Function code 40) <Function> This function allows you to print the EEPROM logs described below. <Operating procedure> (1) Press the button to display “MAINTENANCE 40” on the LCD in the initial state of the maintenance mode. Then, press the OK button. The printer displays “E2PDUMP ENGN ALL”...

  • Page 330: Not-Disclosed-To-Users Functions (Function Code 45)

    1.4.11 Not-disclosed-to-users functions (Function code 45) Regarding the not-disclosed-to-users functions, the function setting can be executed by a simple panel operation. ■ Changing return value of USB No. <Function> ® When the OS of the computer is Windows Vista , and the computer is connected to a device through USB 2.0 full speed, the OS might fail to get the serial No.
  • Page 331 ■ Switching Dither Pattern <Function> This function is to switch the dither pattern when printed letters and/or slanted lines are not smooth, and thin lines are rough or uneven. Description PS.DitherType=0 Dither Pattern 0 is selected. (A dither pattern which improves roughness of letters and slanted lines) (default) PS.DitherType=1 Dither Pattern 1 is selected.
  • Page 332 ■ Switching of timing to execute Auto Registration <Function> Relative displacement between Cyan, Magenta, Yellow, and Black is detected using the registration mark sensor, and the Auto Registration is executed at the timing when the displacement value exceeds the stipulated threshold value. This is a function to switch the threshold value which is used as the timing to execute Auto Registration.
  • Page 333 ■ Switching ON/OFF of Deep Sleep function <Function> This function is to switch whether or not to permit the printer to go into Deep Sleep when StoreData(Secure) exists in the main body. Description DpSlp.StrDt =ON Even when StoreData(Secure) exists, the Deep Sleep function operates.

  • Page 334: Adjustment Of Inter-Color Position Alignment (Function Code 66)

    1.4.12 Adjustment of inter-color position alignment (Function code 66) <Function> This function allows a service man to forcibly activate the inter-color position alignment adjustment function, which is usually executed automatically in a specified condition. If adjustment of inter-color position alignment (auto) fails because toner reaches its life, etc., you can adjust inter-color position alignment manually.
  • Page 335 <Operating procedure after adjustment inter-color position alignment (auto) fails> 1) Press the button to display ”MAINTENANCE 66” on the LCD in the initial state of the maintenance mode. Then, press the OK button. “REGISTRATION” is displayed on the LCD. Load A4-size paper on the tray. 2) Press the button to display “PRINT CHART”...
  • Page 336 ■ Inter-color position alignment adjustment chart Fig. 5-8 5-23 Confidential...
  • Page 337 ■ Reset of inter-color position alignment adjustment (manual) If adjustment of inter-color position alignment (both auto and manual) cannot be executed because an incorrect value is inputted in adjustment of inter-color position alignment (manual), etc., you can clear the input value for adjustment of inter-color position alignment (manual). <Operating procedure>...

  • Page 338: Continuous Print Test (Function Code 67)

    1.4.13 Continuous print test (Function code 67) <Function> This function allows you to conduct the pick-up and delivery test as printing patterns. <Operating procedure> (1) Press the button to display “MAINTENANCE 67” on the LCD in the initial state of the maintenance mode.
  • Page 339 (4) When “SELECT: TRAY1” is displayed on the LCD, press the button to select the print format, and press the OK button. The available print formats are shown below. SELECT: TRAY1 SELECT: TRAY2 SELECT: MP SELECT: TRAY1 DX SELECT: TRAY2 DX SELECT: MP (5) The “PAPER FEED TEST”...
  • Page 340 ■ Continuous print pattern SELECT: K 100% SELECT: C 100% SELECT: M 100% SELECT: Y 100% SELECT: R 100% SELECT: G 100% SELECT: B 100% SELECT: KCMY1% SELECT: KCMY5% SELECT: Lattice Fig. 5-9 5-27 Confidential...

  • Page 341: Laser Unit Test Pattern Print (Function Code 68)

    1.4.14 Laser unit test pattern print (Function code 68) <Function> This function allows you to print the laser unit test patterns and check if there is any failure in the laser unit. <Operating procedure> (1) Press the button to display “MAINTENANCE 68” on the LCD in the initial state of the maintenance mode.

  • Page 342: Frame Pattern Print (One-Sided) (Function Code 69)

    1.4.15 Frame pattern print (One-sided) (Function code 69) <Function> This function allows you to print one page of the frame pattern of the external circumference in one-sided printing and check if there is any deviation or omission of print. <Operating procedure> (1) Load Letter-size paper on the paper tray.
  • Page 343 Fig. 5-11 5-30 Confidential...

  • Page 344: Frame Pattern Print (Two-Sided) (Function Code 70)

    1.4.16 Frame pattern print (Two-sided) (Function code 70) <Function> This function allows you to print one page of the frame pattern of the external circumference in two-sided printing and check if there is any deviation or omission of print. <Operating procedure> (1) Load Letter-size paper on the paper tray.
  • Page 345 (First side) (Second side) Fig. 5-12 5-32 Confidential...

  • Page 346: Color Test Pattern (Function Code 71)

    1.4.17 Color test pattern (Function code 71) <Function> This function allows you to print the pattern of each color and check if there is any smear on or failure in the belt unit, developer roller, and exposure drum, etc. <Operating procedure> (1) Press the button to display “MAINTENANCE 71”...
  • Page 347 ■ Color test pattern YCMK_ _A MCYK Fig. 5-13 5-34 Confidential...

  • Page 348: Sensitivity Adjustment Of Density Sensor (Function Code 72)

    1.4.18 Sensitivity adjustment of density sensor (Function code 72) <Function> This function allows you to print the patch data for density sensor sensitivity adjustment on the belt unit and measure the density with the density sensor. The characteristics of the density sensor are calculated based on the value measured by the density sensor, and the parameter is adjusted upon color density adjustment.

  • Page 349: Setting By Country (Function Code 74)

    1.4.19 Setting by country (Function code 74) <Function> This function allows you to customize the printer according to language, function settings, and worker switch settings. Note: When you replace the main PCB ASSY and rewrite the firmware forcibly, be sure to carry out this procedure.
  • Page 350 ■ Setting by country code list Country HL-4140CN HL-4150CDN HL-4570CDW 0001 0101 Canada 0002 0102 Brazil 0042 Chile 0136 Argentina 0036 Germany 0204 0004 0104 0204 0004 0104 France/Belgium/Netherlands 0204 0004 0104 Italy 0204 0004 0104 Iberia 0204 0004 0104...

  • Page 351: Sensitivity Adjustment Of Registration Mark Sensor And Check Of Belt Unit Surface (Function Code 75)

    1.4.20 Sensitivity adjustment of registration mark sensor and check of belt unit surface (Function code 75) <Function> This function makes the registration mark sensor to adjust its sensitivity compulsory. This allows you to check if the registration mark sensor works properly. This function makes the printer to check the surface of the belt unit by using the registration mark sensor as well.
  • Page 352 ■ Error display when “REGI ADJ-BELTOFF” is executed Error message Description Solution REGI_ADJ:NG Registration mark Execute the adjustment of inter-color position sensor failure alignment (manual). (Refer to “Adjustment of inter-color position alignment (Function code 66)” in this chapter.) Replace the belt unit. Replace the engine PCB ASSY.

  • Page 353: Printout Of Maintenance Information (Function Code 77)

    1.4.21 Printout of maintenance information (Function code 77) <Function> This function allows you to print a list of all maintenance information including printer coverage information. The items are those listed in the second page of the Printer Settings. The following items are printed on the maintenance information only. Average Coverage Total: Accumulated coverage Current: Coverage by the toner cartridge which is currently used...
  • Page 354 ■ Maintenance information Fig. 5-14 5-41 Confidential...

  • Page 355: Operational Check Of Fans (Function Code 78)

    1.4.22 Operational check of fans (Function code 78) <Function> This function is to check whether each of fans is operating correctly or not. The operation of the following fan is checked respectively, and their operating states (rotation speed 100 %, rotation speed 50 %, or OFF) are displayed.

  • Page 356: Display Of Machine History (Log) (Function Code 80)

    1.4.23 Display of machine history (log) (Function code 80) <Function> This function allows you to view the machine history (log). The display items are shown in the table below. Description Serial USB: Serial number MAC: MAC Address (Ethernet Address) Address PCB Serial PCB: Main PCB serial number...
  • Page 357 Description YTN_PG1: Number of printed pages by yellow toner YTN_PG2: Number of printed pages before previous reset of yellow toner YTN_ERM: Remaining toner amount of yellow toner (the calculated value in dots) YTN_RRM: Remaining toner amount of yellow toner (the remaining amount based on the number of rotations of the developer roller) YTN_CH: * Number of times the yellow toner has been replaced/...
  • Page 358 MP_PG: Number of pages picked up from the MP tray tray DX_PG: Number of sheets picked up from the DX (except HL-4140CN) A4+LTR: Number of A4/Letter size sheets picked up LG+F0L: Number of Legal/Folio size sheets picked up B5+EXE:...
  • Page 359 MP_JAM: Number of times when a jam occurs at the MP tray DX_JAM Number of sheets jammed in the DX (except HL-4140CN) IN_JAM: Number of sheets jammed in the printer RE_JAM: Number of sheets jammed around the back cover...

  • Page 360: Error Code Indication (Function Code 82)

    Description MACHINEERR_##: * Error history ## to be displayed to the user: Error code/Occurrence page counter Error log ENGERR##: Engine error history ##: Error level (2 bytes), ****** ****** related large classification code (2 bytes), detailed items classification code (2 bytes) DEVSTATUS__##: * Log for design analysis / Occurrence page counter 01 to 10 are entered in ## in chronological order.

  • Page 361: Developing Bias Voltage Correction (Function Code 83)

    1.4.25 Developing bias voltage correction (Function code 83) <Function> This function performs developing bias voltage correction to fix the density of each color toner when printed color is not correct. Note: Before this function is performed, there is a need that the “Sensitivity adjustment of density sensor (Function mode 72)”...

  • Page 362: Exit From The Maintenance Mode (Function Code 99)

    1.4.26 Exit from the maintenance mode (Function code 99) <Function> This function allows you to exit from the maintenance mode. If the error related to the fuser unit occurs, the error is cleared. (Refer to “2.6 How to Recover from Errors of the Fuser Unit” in this chapter.) <Operating procedure>...

  • Page 363: Other Service Functions

    OTHER SERVICE FUNCTIONS Service Function Menus Enabled by Pressing Button (s) When Turning the Printer On The following settings and functions will be available by holding down the specified button (s) while turning the printer on. ■ Press one button when turning the printer on Panel operation Function Not used...
  • Page 364 ■ Press the button as holding down the Go button in the ready state Panel operation Function ( + ) Parts life reset mode for the periodical replacement parts (Refer to “2.3 Parts Life Reset Function” in this chapter.) ( - ) Switching of Return Value of USB No./Support for Banding (Refer to “2.7 Switching of Return Value of USB No./...

  • Page 365: Developer Roller Counter Reset Function

    Developer Roller Counter Reset Function This function is to manually perform the operation same as the one when a toner cartridge is replaced with a new one. The purpose of this function is to provide a means to resolve an error when a new toner cannot be recognized by the printer, and the toner life display fails to be cleared.
  • Page 366 (3) Once “ Reset Exit” appears on the LCD; press button. (4) The developer roller counter is reset. (5) The printer returns to the state in which the front cover is open. Note: If there is no operation for 30 seconds or more, the printer automatically returns to step (1). 5-53 Confidential...

  • Page 367: Parts Life Reset Function

    Parts Life Reset Function This function is used to reset the relevant part counter when the user replaced a periodical replacement part with the correct procedure, and also used to forcibly reset the relevant part counter when an error cannot be resolved because the user did not replace a consumable part with the correct procedure.

  • Page 368: Printout Of Printer Settings

    Printout of Printer Settings The printer prints “PRINTER SETTINGS”. The “Printer Settings” is configured with three pages for HL-4140CN/4150CDN and four pages for HL-4570CDW/4570CDWT (three pages if the wireless LAN is set to OFF). All pages have following terms in common; Title, Model name, Serial number.
  • Page 369 ■ Printer settings (Page 1) This page includes various setting information of the printer. Each item is indicated when it fulfills the condition. ■ Printer settings (Page 2) This page includes the printer information and the maintenance information in the following order.
  • Page 370 ■ Life of toner cartridge <Method of detecting toner life> Toner life can be detected by toner sensor and by rotation rates of the develop roller. “Replace Toner” is displayed on the LCD when the toner sensor detects that toner runs out, or when the number of rotations of the develop roller reaches the cartridge life end.
  • Page 371 To avoid problems caused by the worn-out of the developer roller surface and deterioration of the toner ceiling, “Replace Toner” message is displayed and the print operation is prohibited when the number of the rotations of the developer roller reaches the upper limit even if toner remains.

  • Page 372: Cartridge Life

    <Cartridge life> The cartridge life (at the point of in the figure above), which depends on the upper limit of the number of rotations of the developer roller, varies according to the average number of print pages per job. (See the table below.) The number of printable pages is larger when making continuous prints in one job because deterioration of the developer roller is low.
  • Page 373 ■ Life of drum unit <How to read the drum unit life> - It initially indicates 100% and gradually decreases. - It indicates 10% when the “Drum End Soon” appears on the LCD. <How to calculate the drum unit life> The drum unit life is based on the “drum counter”...
  • Page 374 The total number of printed pages from each of the MP tray, Manual Feed, Tray 1, Tray 2 and the Duplex. (Duplex is not displayed on the HL-4140CN.) The maximum count is 1 million pages. This information is not cleared when the paper feeding kit is replaced.
  • Page 375 Page 3, Page 4 ■ Printer Settings ( These pages include various network settings information of the printer. HL-4140CN/ Page 3: Wired Network Information 4150CDN HL-4570CDW/ LAN: Wired Enable setting = ON, LAN: WLAN Enable setting = ON 4570CDWT Page 3: Wired Network Information...

  • Page 376: Deletion Of User Setting Information, Etc

    Deletion of User Setting Information, etc. In this printer, the user setting information is stored in the EEPROM and flash memory of the main PCB. You can delete all the data listed below at a time with the procedure given below. - Information related to Net - User setting information - Computer usage limit information (HL-4570CDW/4570CDWT only)

  • Page 377: How To Recover From Errors Of The Fuser Unit

    How to Recover from Errors of the Fuser Unit How to recover from errors of the fuser unit is to use Function code 99 in the maintenance mode. WARNING First of all, turn OFF the power of the printer to cool the fuser unit. When clearing an error, be sure that the fuser unit is cooled down sufficiently.

  • Page 378: Switching Of Return Value Of Usb No./Support For Banding

    Switching of Return Value of USB No./Support for Banding This function allows you to switch the return value of the USB No. and switch controls to resolve banding symptoms. <Operating procedure> (1) Press the Go button and button at the same time while the printer is in the ready state. “USB No.”...
  • Page 379 <Details> Item Description Setting USBNo. When the OS of the computer is USBNo. =ON ® Windows Vista , it might not be able Returns the serial No. of the device. to obtain the serial No. of a USB device depending on the computer USBNo.

  • Page 380: Drum Cleaning

    Drum Cleaning ■ Drum cleaning function overview This function is to attach a special cleaning sheet on the drum and perform the cleaning of the drum. <Operating procedure> (1) Press the Cancel button and button while the printer is in the ready state. “Drum Cleaning/Attach the cleaning sheet.

  • Page 381: Deep Sleep Function

    Deep Sleep Function In addition to the sleep function with the normal specifications, the deep sleep function is prepared to reduce the power consumption. The deep sleep function is used to stop the operation of the following functions whereas they are available in the normal sleep mode.

  • Page 382: Chapter 6 Circuit Diagrams & Wiring Diagram

    CHAPTER 6 CIRCUIT DIAGRAMS & WIRING DIAGRAM Confidential...
  • Page 383 CHAPTER 6 CIRCUIT DIAGRAMS & WIRING DIAGRAM This chapter provides the circuit diagrams and wiring diagram for the connections of the PCBs. CONTENTS 1. CIRCUIT DIAGRAMS.................6-1 2. WIRING DIAGRAM ..................6-6 Confidential...

  • Page 384: Circuit Diagrams

    CIRCUIT DIAGRAMS ■ High-voltage Power Supply PCB Circuit Diagram (1/3) Confidential...
  • Page 385 ■ High-voltage Power Supply PCB Circuit Diagram (2/3) Confidential...
  • Page 386 ■ High-voltage Power Supply PCB Circuit Diagram (3/3) Confidential...
  • Page 387 ■ Low-voltage Power Supply PCB Circuit Diagram (100V) Confidential...
  • Page 388 ■ Low-voltage Power Supply PCB Circuit Diagram (200V) Confidential...

  • Page 389: Wiring Diagram

    WIRING DIAGRAM ■ Wiring Diagram Confidential...

  • Page 390: Chapter 7 Periodical Maintenance

    CHAPTER 7 PERIODICAL MAINTENANCE Confidential...
  • Page 391 CHAPTER 7 PERIODICAL MAINTENANCE This chapter details periodical replacement parts. This chapter also covers procedures for disassembling and assembling periodical replacement parts. CONTENTS 1. PRECAUTIONS..................7-1 2. PERIODICAL REPLACEMENT PARTS ............7-2 2.1 Procedures to Replace Periodical Replacement Parts..........7-2 2.1.1 Fuser unit......................7-3 2.1.2 Laser unit......................

  • Page 392: Precautions

    PRECAUTIONS To avoid creating secondary problems by mishandling, follow the warnings below during maintenance work. WARNING - Always turn off the power switch and unplug the power cord from the power outlet before accessing any parts inside the printer. - When opening the front cover or back cover to access any parts inside the printer, never touch the shaded parts shown in the following figures.

  • Page 393: Periodical Replacement Parts

    PERIODICAL REPLACEMENT PARTS Procedures to Replace Periodical Replacement Parts ■ Preparation Prior to proceeding with the disassembly procedure, (1) Unplug - the AC cord, - the USB cable, if connected, - the LAN cable, if connected, and - USB flash memory drive, if connected. - LAN port cap (2) Remove the Paper tray.

  • Page 394: Fuser Unit

    2.1.1 Fuser unit (1) Open the Back cover. Main body Back cover <Back side> Fig. 7-1 (2) Remove the Back cover stopper arm L and R from the Main body. Main body Back cover stopper arm L Back cover stopper arm L Back cover stopper arm R <Back side>...
  • Page 395 (3) Remove the Shaft of the Back cover from the Bush on the right side of the Main body. Main body Bush Shaft Back cover Fig. 7-3 (4) Remove the Back cover. Main body Back cover <Back side> Fig. 7-4 Confidential...
  • Page 396 (5) Open the Back flapper ASSY. Main body Back flapper ASSY <Back side> Fig. 7-5 (6) Release of the Fuser cover lock lever L and R and open the Fuser cover. Main body Fuser cover lock lever L Fuser cover Fuser cover lock lever R <Back side>...
  • Page 397 (7) Remove the Taptite bind S M3x8 screw from the Fuser cover L. (8) Release the Hook to remove the Fuser cover L from the Main body. Main body Fuser cover L Taptite bind S M3x8 Hook <Back side> Fig. 7-7 (9) Slide the Fuser cover in the direction of the arrow 9a to remove it to the front.
  • Page 398 (10) Remove the Taptite bind S M3x8 screw from the Fuser cover R. (11) Release the Hook to remove the Fuser cover R from the Main body. Hook Main body Fuser cover R Taptite bind S M3x8 <Back side> Fig. 7-9 (12) Disconnect the two Connectors (CN1, CN2) from the Paper eject sensor PCB ASSY.
  • Page 399 (13) Disconnect the Electrode terminal from the Fuser unit. Electrode terminal (small) Fuser unit Electrode terminal (large) Fig. 7-11 (14) Remove the two Taptite pan B M4x14 screws to remove the Fuser unit from the Main body. Main body Taptite pan B M4x14 Fuser unit <Back side>...
  • Page 400 (15) Remove the Toner filter ASSY from the Paper eject ASSY. Paper eject ASSY <Back side> Paper eject ASSY Toner filter ASSY Fig. 7-13 (16) Hold down the Cleaner spring of the Cleaner pinch roller holder to remove the Cleaner pinch roller ASSY.
  • Page 401 Note: - Do not apply a physical impact or vibration to the Fuser unit. - Do not touch the roller and electrodes as shown in the figure below to prevent breakage of the Fuser unit. Fuser unit Fig. 7-15 (18) After replacing the Fuser unit, reset the counter. (Refer to “2.3 Parts Life Reset Function”...

  • Page 402: Laser Unit

    2.1.2 Laser unit (1) Open the Back cover. Main body Back cover <Back side> Fig. 7-16 (2) Remove the Back cover stopper arm L and R from the Main body. Main body Back cover stopper arm L Back cover stopper arm L Back cover stopper arm R <Back side>...
  • Page 403 (3) Remove the Shaft of the Back cover from the Bush on the right side of the Main body. Main body Bush Shaft Back cover Fig. 7-18 (4) Remove the Back cover. Main body Back cover <Back side> Fig. 7-19 7-12 Confidential...
  • Page 404 (5) Open the Back flapper ASSY. Main body Back flapper ASSY <Back side> Fig. 7-20 (6) Open the Front cover. Main body Front cover <Front> Fig. 7-21 7-13 Confidential...
  • Page 405 (7) Remove the Taptite bind S M3x8 screw from the front of the Side cover L. (8) Remove the Taptite bind B M4x12 screw from the side of the Side cover L. Taptite bind S M3x8 Taptite bind B M4x12 <Front>...
  • Page 406 (10) Release the Hooks 1 and 2 at the same time, and then release the Hooks 3 to 6 in numerical order. Hold the "A" section and lift the cover to release the Hook 7. Lower the cover, and then lift it again and release the Hooks 8 and 9 to remove the Side cover L from the Main body.
  • Page 407 (11) Remove the Taptite bind S M3x8 screw from the front of the Side cover R ASSY. (12) Remove the Taptite bind B M4x12 screw from the side of the Side cover R ASSY. Side cover R ASSY Taptite bind S M3x8 Taptite bind B M4x12 <Front>...
  • Page 408 (14) Release the Hooks 1 and 2 at the same time, and then release the Hooks 3 to 6 in numerical order. Hold the "A" section and lift the cover to release the Hook 7. Lower the cover, and then lift it again and release the Hooks 8 and 9 to remove the Side cover R ASSY from the Main body.
  • Page 409 (15) Remove the six Taptite cup S M3x6 SR screws to remove the Main shield cover plate ASSY from the Main body. Main body Taptite cup S M3x6 SR Main shield cover plate ASSY Taptite cup S M3x6 SR <Left side> Fig.
  • Page 410 (17) Remove the Taptite cup S M3x6 SR screw from the front of the Top cover ASSY. Top cover ASSY Taptite cup S M3x6 SR <Front> Fig. 7-32 (18) Remove the two Taptite bind B M4x12 screws from the back of the Top cover ASSY. Top cover ASSY Taptite bind B M4x12 Taptite bind B M4x12...
  • Page 411 (19) Release the three Hooks 1, and then release the Hooks 2 to 7. Insert a screwdriver into the hole to release the Hook and press the Hook 8 with the screwdriver to release it. Release the Hook 9 by pressing it with a screwdriver to remove the Top cover ASSY from the Main body.
  • Page 412 (22) Disconnect cables from the Upper cable rack. (23) Release the four Hooks to remove the Upper cable rack from the Base frame unit. Upper cable rack Hook Hook <Left side> Base frame unit Fig. 7-36 (24) Remove the two Taptite cup S M3x6 SR screws to remove the Top beam from the Base frame unit.
  • Page 413 (25) Remove the five Taptite cup S M3x6 SR screws to remove the four Scanner holders. Taptite cup S Taptite cup S M3x6 SR M3x6 SR Scanner holder Scanner holder Taptite cup S M3x6 SR Scanner holder Taptite cup S M3x6 SR Taptite cup S M3x6 SR Scanner holder Scanner holder...
  • Page 414 (26) Remove the Connector (CN8) and two Flat cables from the Laser unit to remove the Laser unit from the Base frame unit. Laser unit Base frame unit Flat cable Connector <Front> Flat cable Fig. 7-39 Assembling Note: When connecting flat cable(s), do not insert them at an angle. After insertion, check that the cable are not at an angle.

  • Page 415: Paper Feeding Kit1

    2.1.3 Paper feeding kit1 (1) Release the Hook to remove the T1 separation pad holder ASSY from the Paper tray. T1 separation pad holder ASSY “A” Paper tray “B” Hook Fig. 7-40 Assembling Note: Mount the T1 separation pad holder ASSY in a way that “A” of the T1 separation pad holder ASSY is inserted into “B”...
  • Page 416 (2) Remove the T1 separation pad spring from the Paper tray. Note: Be careful not to lose the T1 separation pad spring. T1 separation pad spring Paper tray Fig. 7-41 (3) Push the T1 lift arm to the back to remove “B” of the Roller holder ASSY from “A” of the T1 lift arm.
  • Page 417 (4) Slide the Roller holder ASSY in the direction of the arrow 4 to remove it from the “C” of the PF ASSY. (5) Slide the Roller holder ASSY in the direction of the arrow 5a and 5b in this order to remove it.

  • Page 418: Paper Feeding Kit2

    2.1.4 Paper feeding kit2 (1) Release the two Hooks of the T2 separation pad ASSY to remove them in the upward direction. Note: Be careful not to lose the T2 separation pad spring. T2 separation pad ASSY Hook Hook T2 paper tray unit Fig.
  • Page 419 (3) Release the Hook and slide the T2 separation roller ASSY in the direction of the arrow 3. (4) Remove the T2 separation roller ASSY in the direction of the arrow 4b as rotating it in the direction of the arrow 4a. T2 separation roller ASSY T2 separation roller ASSY Hook...
  • Page 420 (5) Release the Hooks to remove the Feed roller ASSY from the Paper feed shaft. T2 paper feed frame unit Feed roller ASSY Hook Paper feed shaft Fig. 7-49 (6) After replacing the Paper feeding kit, reset the counter. (Refer to “2.3 Parts Life Reset Function”...

  • Page 421: Mp Paper Feeding Kit

    2.1.5 MP paper feeding kit (1) Press “A” to release the Hook and then remove the MP upper frame cover from the MP upper cover ASSY. “A” MP upper frame cover Hook MP upper cover ASSY Fig. 7-50 (2) Remove the MP lift arm B from the MP upper cover ASSY. MP lift arm B MP upper cover ASSY Fig.
  • Page 422 (3) Release the Hook to remove the MP holder bush from the MP upper cover. Hook MP holder bush MP upper cover ASSY Fig. 7-52 (4) Remove the MP roller holder ASSY from the MP upper cover ASSY. MP roller holder ASSY MP upper cover ASSY Fig.
  • Page 423 (5) Turn the MP separation pad ASSY upright to remove it from the MP unit. MP sepration pad ASSY MP unit MP sepration pad ASSY Fig. 7-54 (6) Remove the MP separation pad spring from the two Pins of MP unit. MP separation pad spring MP unit Fig.
  • Page 424 APPENDIX 1. SERIAL NUMBERING SYSTEM Confidential...

  • Page 425: Appendix 1 Serial Numbering System

    APPENDIX 1 SERIAL NUMBERING SYSTEM ■ Serial number labels for the printer itself Serial number A 0 J 1 1 1 1 0 1 Model number Serial number (6-digit) Manufacturing factory No. Year of manufacture 0: 2010 1: 2011 Month of manufacture A: January E: May J: September...
  • Page 426 APPENDIX 2. DELETION OF USER SETTING INFORMATION, ETC. This appendix provides instructions on how to delete user setting information etc. recorded in the printer. Confidential...
  • Page 427 APPENDIX 2 DELETION OF USER SETTING INFORMATION, ETC. In this printer, the user setting information is stored in the EEPROM and flash memory of the main PCB ASSY. You can delete all the data listed below at a time with the procedure given below. - Information related to Net - User setting information - Computer usage limit information (HL-4570CDW/4570CDWT only)
  • Page 428 APPENDIX 3. INSTALLING THE MAINTENANCE DRIVER Confidential...
  • Page 429 APPENDIX 3 INSTALLING THE MAINTENANCE DRIVER To identify multiple printers connected to the computer via USB, the computer needs to configure the corresponding number of virtual USB devices by a driver or software. If you connect a multiple number of printers to your computer, the same number of virtual USB devices will be automatically configured on your computer.
  • Page 430 (5) Alert warning message appears three times, click Continue Anyway to proceed. (6) If the device driver is successfully installed, the following message screen appears. Click Finish to return. App.3-2 Confidential...
  • Page 431 (7) Connect the printer to your computer using the USB cable. (8) The following screen appears, indicating the detection of new hardware device by the system. Select “No, not this time” and click Next. (9) Select “Install the software automatically (Recommended)” and click Next. App.3-3 Confidential...
  • Page 432 (10) Alert warning message appears, click Continue Anyway to proceed. App.3-4 Confidential...
  • Page 433 (11) If the Brother maintenance USB printer driver is successfully installed, the following message screen appears. Click Finish to return. (12) Repeat the steps from (9) to (11) three times, and then complete its installation. (13) Disconnect the USB cable.

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