Page 1 Brother Color Laser Printer SERVICE MANUAL MODEL: HL-L8250CDN/ L8350CDW/L8350CDWT/ L9200CDW/L9200CDWT Read this manual thoroughly before maintenance work. Keep this manual in a convenient place for quick and easy reference at all times. January 2014 SM-PRN094 84E5* Confidential...
Page 2 Each company whose software title is mentioned in this manual has a Software License Agreement specific to its proprietary programs. Any trade names and product names of companies appearing on Brother products, related documents and any other materials are all trademarks or registered trademarks of those respective companies.
Page 3 OPEN SOURCE LICENSING REMARKS This product includes open-source software. Please visit the Brother Solutions Center at http://solutions.brother.com/ to view the Open Source Licensing Remarks and Copyright information. COPYRIGHT AND LICENSE ©2014 Brother Industries, Ltd. All rights reserved. This product includes software developed by the following vendors: ©1983-1998 PACIFIC SOFTWORKS, INC.
Page 4: Table Of Contents
CONTENTS REGULATION ................... I SAFETY INFORMATION ..............VI CHAPTER 1 SUPPLEMENTAL SPECIFICATIONS 1.1 General ........................1-1 1.2 Network Connectivity ....................1-2 1.3 Service Information..................... 1-2 1.4 Supplies ........................1-3 CHAPTER 2 ERROR INDICATION AND TROUBLESHOOTING 1. INTRODUCTION ..................2-1 1.1 Precautions......................... 2-1 1.2 Checks before Commencing Troubleshooting............
Page 5 4.2.8 Unable to perform 2-sided printing ..............2-83 4.2.9 Paper jam ......................2-84 4.3 Troubleshooting for Image Defects................2-88 4.3.1 Image defect examples ................... 2-88 4.3.2 Troubleshooting image defect ................. 2-89 4.4 Troubleshooting for Software Problems ..............2-106 4.4.1 Unable to receive data................... 2-106 4.5 Troubleshooting for Network Problems ..............
Page 6 5. LUBRICATION ...................3-6 6. OVERVIEW OF GEARS................3-7 7. HARNESS ROUTING.................3-8 8. DISASSEMBLY FLOW................3-17 9. DISASSEMBLY PROCEDURE ..............3-18 9.1 Lift Gear 46/Gear Z19M10..................3-19 9.2 Support Flap ......................3-20 9.3 Back Cover/Back Cover Stopper Arm L/Back Cover Stopper Arm R ....... 3-21 9.4 Fuser Cover ASSY ....................
Page 7 9.27 Paper Eject ASSY ....................3-81 9.28 Toner Filter ASSY ....................3-82 9.29 Paper Eject Origin Sensor ..................3-83 9.30 Back Cover Sensor ASSY ..................3-85 9.31 Eject Sensor PCB ASSY ..................3-86 9.32 Registration Mark Sensor Unit................3-87 9.33 Power Fan ......................3-88 9.34 Low-voltage Power Supply PCB Unit ..............
Page 8 2. IF YOU REPLACE THE REGISTRATION MARK SENSOR UNIT ....4-6 2.1 Continuous Adjustments of Density and Registration Sensor (Function code 73) ..4-6 3. IF YOU REPLACE THE LOW-VOLTAGE POWER SUPPLY PCB UNIT ....................4-7 3.1 Reset of Irregular Power Supply Detection Counter of Low-Voltage Power Supply PCB (Reset Counters for Parts (Function code 88)) ..
Page 9 CHAPTER 5 SERVICE FUNCTIONS 1. MAINTENANCE MODE................5-1 1.1 How to Enter the Maintenance Mode ................. 5-1 1.1.1 How to Enter the Maintenance Mode Exclusive to Service Personnel ....5-1 1.1.2 How to Enter the End User-accessible Maintenance Mode ......5-2 1.2 List of Maintenance-mode Functions................
Page 10 1.3.26 Display of device log information (Function code 80) ........5-51 1.3.27 Display of device error codes (Function code 82) ......... 5-55 1.3.28 Developing bias voltage correction (Function code 83)......... 5-56 1.3.29 Reset counters for parts (Function code 88) ..........5-57 1.3.30 Exit from the maintenance mode (Function code 99)........
Page 11: Regulation
REGULATION Declaration of Conformity (Europe only)  We, Brother Industries, Ltd. 15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561 Japan declare that this product is in conformity with the essential requirements of all relevant directives and regulations applied within the European Community. The Declaration of Conformity (DoC) can be downloaded from our website. Visit http://solutions.brother.com/ and:...
Page 12 Disconnect device  CAUTION 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) ...
Page 13 Program is to promote the development and popularization of energy-efficient office equipment. ® As an ENERGY STAR Partner, Brother Industries, Ltd. has determined that this product ® meets the ENERGY STAR specifications for energy efficiency. Federal Communications Commission (FCC) Declaration of Conformity ...
Page 14 IMPORTANT - Changes or modifications not expressly approved by Brother Industries, Ltd. could void the user’s authority to operate the equipment. - A shielded interface cable should be used to ensure compliance with the limits for a Class B digital device.
Page 15 FDA regulations and must be attached to laser products marketed in the United States. Manufactured: BROTHER TECHNOLOGY (SHENZHEN) LTD. No.6 Gold Garden Ind. Nanling, Nanwan, Longgang, Shenzhen, China This product complies with FDA performance standards for laser products except for deviations pursuant to Laser Notice No.
Page 16: Safety Information
SAFETY INFORMATION Definitions of Warnings, Cautions, Notes and Memos  The following conventions are used in this manual: Mark Contents WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injuries. CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injuries.
Page 17 To use the Machine Safely  Please keep these instructions for later reference and read them before attempting any maintenance. If you do not follow these safety instructions, there is a possibility of a fire, electrical shock, burn or suffocation. WARNING ELECTRICAL HAZARDS Failure to follow the warnings in this section may create the risk of an electrical shock.
Page 18 Doing so may cause the cord to become worn or frayed. - Brother strongly recommends that you DO NOT use any type of extension cord. - DO NOT put a toner cartridge, a toner cartridge and drum unit assembly, or a waste toner box into a fire.
Page 19 HOT SURFACE After you have just used the product, some internal parts of the product will be extremely hot. Wait for the product to cool down before you touch the internal parts of the product. This product is heavy and weighs more than 20.0 kg. (44.1 lb). To prevent possible injuries, at least two people should lift the product.
Page 20 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 21: Chapter 1 Supplemental Specifications
Option Option Standard Option Standard equipment equipment Model HL-L8250CDN HL-L8350CDW HL-L8350CDWT HL-L9200CDW HL-L9200CDWT Warm-up From Sleep Less than 29 seconds at 73.4 F (23 °C) time mode From Power Less than 31 seconds at 73.4 F (23 °C) OFF → ON...
Page 22: Network Connectivity
Network Connectivity Model HL-L8250CDN HL-L8350CDW HL-L8350CDWT HL-L9200CDW HL-L9200CDWT Wired Network node NC-8600h network type Wireless Network node NC-8200w network type Specifications are subject to change without prior notice. Service Information Model HL-L8250CDN HL-L8350CDW HL-L8350CDWT HL-L9200CDW HL-L9200CDWT Machine life 200,000 pages (A4 /Letter size) or 5 years...
Page 23: Supplies
Supplies Model HL-L8250CDN HL-L8350CDW HL-L8350CDWT HL-L9200CDW HL-L9200CDWT Starter Black Toner Approximately 2,500 pages Approximately 6,000 pages Toner cartridge (Except for China) (Except for China) Approximately 4,000 pages (for China) Approximately 4,000 pages (for China) Cyan, Approximately 1,500 pages Approximately 6,000 pages...
Page 24: Chapter 2 Error Indication And Troubleshooting
CHAPTER 2 ERROR INDICATION AND TROUBLESHOOTING INTRODUCTION Troubleshooting is the countermeasure procedures that the service personnel should follow if an error or malfunction occurs with the machine. 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 25 WARNING DO NOT use any flammable spray or flammable solvent such as alcohol, benzine, or thinner in or around the machine. Otherwise a fire or electric shock may result. (5) Check again that the portions and parts repaired or removed during the repair work function properly when the repair is completed.
Page 26: Checks Before Commencing Troubleshooting
Checks before Commencing Troubleshooting Check the following items before attempting to repair the machine. ■ Operating environment (1) The machine is placed on a flat, stable surface. (2) The machine is used in a clean environment where the temperature is between 10 °C (50 °F) and 32.5 °C (90.5 °F) and the relative humidity is maintained between 20 % and 80 %.
Page 27 ■ Cleaning Use a soft dry lint-free cloth. WARNING DO NOT use any flammable spray or flammable solvent such as alcohol, benzine, or thinner to clean the machine. DO NOT use these articles near the machine. Confidential...
Page 28: Overview
OVERVIEW Cross-section Drawing Exposure drum (Yellow) Exposure drum (Cyan) Exposure drum (Magenta) Eject roller 3 Exposure drum (Black) <Back side> <Front side> Eject roller 2 Registration rear actuator Registration roller MP registration front actuator Eject roller 1 MP separation roller Eject actuator MP paper pick-up roller Heat roller...
Page 29: Paper Feeding
Paper Feeding Duplex path <Front side> <Back side> Paper eject from the back side. Paper feed from the MP tray. Paper tray 1 path T2 paper tray unit path Fig. 2-2 Confidential...
Page 30: Operation Of Each Part
Operation of Each Part Part name Operation T1 paper pick-up roller Feed the paper from the paper tray 1 to T1 separation roller. T1 separation roller, Separates the paper fed from paper tray 1 into single sheets. T1 separation pad T1 paper feed actuator Detect whether or not the paper tray 1 is installed (open or (T1 paper feed sensor)
Page 31: Block Diagram
Block Diagram Model without touch panel Control panel Laser unit BD sensor LD SUB Panel PCB ASSY 2Line LCD PCB ASSY PCB ASSY Polygon motor LD PCB ASSY Control panel Panel control Key PCB ASSY PCB ASSY Front cover sensor 1.8-inch Color LCD Panel relay Back cover sensor ASSY...
Page 32: Main Components
Main Components Toner cartridge Top cover ASSY Drum unit Wireless LAN PCB Laser unit Belt unit Paper eject ASSY Fuser cover ASSY Back cover Waste toner Fuser unit Low-voltage power supply PCB unit Side cover R Fuser fan Duplex tray Registration mark sensor unit High-voltage...
Page 33: Error Indications
ERROR INDICATIONS This machine includes a self-diagnosis function. If the machine 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 personnel to quickly find out the problem. Error Codes The shaded errors hardly occur under normal use.
Page 34 Error Error Refer Refer Description Description Codes Codes 050C When the temperature of the 2-42 1004 The registration mark sensor L 2-45 center thermistor of the fuser is dirty and cannot normally unit is higher than the idle receive reflected light. temperature, the side thermistor of the fuser unit detected a 1100...
Page 35 Error Error Refer Refer Description Description Codes Codes 2301 2A03 2302 2B01 2401 2B02 2402 2C01 2403 2C02 2404 2D01 2405 2E01 2408 2E02 2409 2E03 2501 2E04 2502 2E05 2503 2E06 2504 2E07 2601 2E08 2602 2E0A 2603 2F01 2604 2F02 2605...
Page 36 Error Error Refer Refer Description Description Codes Codes 3701 4600 Number of pages printed with 2-48 the laser unit has reached the 3702 upper limit. 3703 3801 Temperature error occurred in 2-47 4700 The waste toner sensor 2-49 the external temperature/ detected that the waste toner humidity sensor.
Page 37 Error Error Refer Refer Description Description Codes Codes 4C05 During printing, dot counter of 2-50 5802 color toner cartridge or develop 5902 roller counter has reached the upper limit was detected. 5A02 4D01 5B02 4E01 5C02 4F01 The new toner sensor of the 2-51 6001 The front cover sensor detected...
Page 38 Error Error Refer Refer Description Description Codes Codes 6300 The waste toner sensor 2-56 6C04 detected that no waste toner box 6D00 was set. 6E00 The develop release sensor 2-59 detected the developer roller 6400 The registration mark sensor 2-56 disengagement or engagement detected that no belt unit was failure.
Page 39 Error Error Refer Refer Description Description Codes Codes 7400 In the case of printing by feeding 2-62 8504 paper from the T2 paper tray 8505 The T1 paper feed sensor 2-64 unit, after the T2 paper feed detected that the paper tray 1 is sensor detects paper pass, the open in 2-sided printing or registration front sensor does...
Page 40 Error Error Refer Refer Description Description Codes Codes 8D01 The registration rear sensor 2-65 9303 When paper was fed from the T2 2-68 detected that the paper loaded paper tray unit, the T2 paper in the paper tray was smaller feed sensor detected that no than the specified size.
Page 41 Error Error Refer Refer Description Description Codes Codes 9801 Error occurred with the value 2-70 A500 measured during color density A600 adjustment performed from the control panel. A700 9802 Dot counter or develop roller 2-70 A800 counter of color toner has A900 reached the upper limit during color density adjustment...
Page 42 Error Error Refer Refer Description Description Codes Codes C700 The memory is insufficient to 2-75 F900 Setting by spec code is not 2-78 expand the data of PC-Print. entered. C800 The memory used to store 2-75 FA01 secure print data exceeded the FA02 memory size for secure print FA03...
Page 43: Error Message
Error Message The error messages displayed on the LCD of the machine and their description are shown in the table below. ■ Model without touch panel Error Message Error Refer State Codes 1st line 2nd line Access Function Locked. In the case of PC-print, 4.10.3 Denied authentication of print restricted...
Page 44 Error Message Error Refer State Codes 1st line 2nd line Cartridge Put the Black (BK) The new toner sensor of the 4F01 2-51 Toner Cartridge toner cartridge (Black) could not Error back in. detect a new cartridge properly. Put the Cyan (C) The new toner sensor of the 4F04 2-51...
Page 45 Error Message Error Refer State Codes 1st line 2nd line Undecodable data is found 4.11.1 Ignore Data during printing. Undecodable PS data is received. After the first side is printed in 7700 2-63 Jam 2-sided Pull out Tray 1 2-sided printing mode, the completely.
Page 46 Error Message Error Refer State Codes 1st line 2nd line Limit Function Locked In the case of PC-print, the 4.11.1 maximum number of pages that Exceeded can be printed is exceeded. Function Locked. In the case of Secure print, the 4.11.1 Job Deleted.
Page 47 Error Message Error Refer State Codes 1st line 2nd line No Paper Load #S paper in When paper was fed from the MP 9301 2-67 tray, the MP paper empty sensor detected that no paper was in the MP tray. When paper was fed from the 9302 2-67...
Page 48 Error Message Error Refer State Codes 1st line 2nd line No Tray Reinstall tray 1 The T1 paper feed sensor 8505 2-64 detected that the paper tray 1 is open in 2-sided printing or printing by feeding paper from the T2 paper tray unit. (after the registration of printing in the engine) The T1 paper feed sensor...
Page 49 Error Message Error Refer State Codes 1st line 2nd line Replace Belt - Number of pages printed with the 4400 2-48 belt unit has reached the upper limit. Number of used pages for the 4500 2-48 Replace fuser unit has reached the upper Fuser limit.
Page 50 Error Message Error Refer State Codes 1st line 2nd line Turn the power off, Some fuser unit errors occurred 6901 2-57 Self- then on again. at power-ON or upon recovery Diagnostic Leave the machine from sleep mode. for 15 min. Will Automatically After the error was detected at 6902...
Page 51 Error Message Error Refer State Codes 1st line 2nd line Load #S paper and The size of paper loaded in the 9002 2-66 Size press Go. paper tray 1 and the one Mismatch specified from the driver are not same when paper is fed from the paper tray 1.
Page 52 Error Message Error Refer State Codes 1st line 2nd line Press Stop.Wait Execution of the program update 4.11.3 Unable to until Ready state cannot be started because other Update and try again. function is being executed. An USB device that did not meet 4.11.2 Unusable the specifications was inserted...
Page 53 ■ Model with touch panel Error Message Error Refer State Codes Upper line Middle line Access Function Locked. In the case of PC-print, 4.10.3 authentication of print restricted Denied 4.10.3 ID failed. Function Locked. Job Deleted. Calibration failed. Dot counter or develop roller 9802 2-70 Calibration...
Page 54 Error Message Error Refer State Codes Upper line Middle line Drum ! Electric discharge that may be 6A00 2-59 caused by dirt on the corona wire of the drum unit was detected. Drum Stop Replace the Drum Electric discharge was detected 6B01 2-58 Unit.
Page 55 Error Message Error Refer State Codes Upper line Middle line Log Access Authentication User authentication is C002 2-74 Error error, contact your unavailable due to incorrect user administrator. name, incorrect password, or asynchronous date and time between the machine and server. Access to a file is unavailable C003 2-74...
Page 56 Error Message Error Refer State Codes Upper line Middle line No Paper When paper was fed from the MP 9301 2-67 tray, the MP paper empty sensor detected that no paper was in the MP tray. For printing specifying Auto, it 9306 2-70 was detected that no paper was...
Page 57 Error Message Error Refer State Codes Upper line Middle line No Tray T1 The T1 paper feed sensor 8505 2-64 detected that the paper tray 1 is open in 2-sided printing or print- ing by feeding paper from the T2 paper tray unit.
Page 58 Error Message Error Refer State Codes Upper line Middle line Dot counter of the toner cartridge 4C01 2-50 Replace (Black) or develop roller counter Toner has reached the upper limit was detected. Dot counter of the toner cartridge 4C04 2-50 (Cyan) or develop roller counter has reached the upper limit was detected.
Page 59 Error Message Error Refer State Codes Upper line Middle line Specify the correct For printing by feeding paper 9702 2-69 Size Error paper size for Tray from the paper tray 1, the size of paper specified from the driver set the size which was not supported by the paper tray 1.
Page 60 Error Message Error Refer State Codes Upper line Middle line Belt End Soon Number of pages printed with the 4300 2-48 Supplies belt unit will reach the upper limit soon. Drum End Soon. Number of the drum unit rotations 4000 2-47 reaches the upper limit soon.
Page 61 Error Message Error Refer State Codes Upper line Middle line Unusable Device An USB device that did not meet 4.11.2 Unusable the specifications was inserted Device into the USB port. Remove the Overcurrent was caused EC00 2-77 Device. Turn the because a USB device that did power off and back not meet the specifications was...
Page 62: Troubleshooting
TROUBLESHOOTING Error Cause and Remedy Note: This page shows LCD display for models without touch panel. It may differ from display shown on models with touch panel. ■ Error code 0100 Print Unable 01 Turn the power off and then back on again. ASIC error or motor driver error occurred.
Page 63 ■ Error code 0300 Print Unable 03 Turn the power off and then back on again. The Lock signal of the polygon motor of the laser unit cannot be detected. Error code 0401 Print Unable 04 Turn the power off and then back on again. BD sensor 1 damaged.
Page 64 ■ Error code 0501 Print Unable 05 Turn the power off and then back on again. The center thermistor of the fuser unit does not reach the specified temperature within the specified time. Error code 0502 Print Unable 05 Turn the power off and then back on again. After the temperature of the fuser unit rises to a certain level, the temperature of the center thermistor does not reach the specified temperature within the specified period of time in the next step.
Page 65 ■ Error code 050A Print Unable 05 Turn the power off and then back on again. The center thermistor or side thermistor of the fuser unit detected some temperature error in the hardware. Error code 050B Print Unable 05 Turn the power off and then back on again. When the temperature of the center thermistor of the fuser unit is lower than the idle temperature, the side thermistor of the fuser unit detected a temperature higher than the specified value.
Page 66 ■ Error code 0800 Print Unable 08 Turn the power off and then back on again. Error occurred in the internal temperature sensor. Step Cause Remedy Connection failure of the internal Reconnect the internal temperature temperature sensor harness sensor harness. Main PCB failure Replace the main PCB ASSY.
Page 67 ■ Error code 0A02 Print Unable 0A Turn the power off and then back on again. The fuser fan failure was detected. Step Cause Remedy Connection failure of the fuser Reconnect the fuser fan harness. fan harness Connection failure of the Reconnect the high-voltage power supply high-voltage power supply PCB PCB harness.
Page 68 ■ Error code 0E00 Print Unable 0E Turn the power off and then back on again. Communication error occurred in the high-voltage power supply PCB ASSY. Step Cause Remedy Connection failure of the Reconnect the high-voltage power supply high-voltage power supply PCB PCB harness.
Page 69 ■ Error code 1400 Condensation Turn the power switch off and open the Front Cover. Wait 30 minutes, and then turn it on again. Condensation occurred in the machine. < User Check > - Open the front and back covers and leave them for 30 minutes or more with the power ON. After that, close the front and back covers and turn OFF and ON the power switch.
Page 70 ■ Error code 3801 Print Unable 38 Turn the power off and then back on again. Temperature error occurred in the external temperature/humidity sensor. Error code 3802 Print Unable 38 Turn the power off and then back on again. Humidity error occurred in the external temperature/humidity sensor. Step Cause Remedy...
Page 71 ■ Error code 4300 Belt End Soon Number of pages printed with the belt unit will reach the upper limit soon. (90%) Error code 4400 Replace Belt Number of pages printed with the belt unit has reached the upper limit. (Printing is not stopped.) <...
Page 72 ■ Error code 4700 WT Box End Soon The waste toner sensor detected that the waste toner box is almost full. Error code 4800 Replace WT Box Replace the Waste Toner Box inside the machine. After the waste toner sensor detected that the waste toner box was almost full, pages more than the specified number have been printed.
Page 73 ■ Error code 4C01 Replace Toner Open the Top Cover, replace Toner Cartridge. Black (BK). Dot counter of the toner cartridge (Black) or develop roller counter has reached the upper limit was detected. Error code 4C02 Replace Toner Open the Top Cover, replace Toner Cartridge. Yellow (Y). Dot counter of the toner cartridge (Yellow) or develop roller counter has reached the upper limit was detected.
Page 74 ■ Error code 4F01 Cartridge Error Put the Black (BK) Toner Cartridge back in. The new toner sensor of the toner cartridge (Black) could not detect a new cartridge properly. Error code 4F02 Cartridge Error Put the Yellow (Y) Toner Cartridge back in. The new toner sensor of the toner cartridge (Yellow) could not detect a new cartridge properly.
Page 75 ■ Error code 5001 Replace PF Kit MP Number of used pages for the PF kit MP has reached the upper limit. (Printing is not stopped.) Step Cause Remedy The PF kit MP is at the end of life Replace the PF kit MP. After replacing the PF kit MP, refer to “1.3.29 Reset counters for parts (Function code 88)”...
Page 76 ■ Error code 6001 Cover is Open Close the Front Cover. The front cover sensor detected that the front cover was open. < User Check > - Close the front cover. Step Cause Remedy Connection failure of the front Reconnect the front cover sensor cover sensor harness harness.
Page 77 ■ Error code 6101 No Toner Open the Front Cover, then install Toner Cartridge. Black (BK). The toner sensor detected that no toner cartridge (Black) was set. Error code 6102 No Toner Open the Front Cover, then install Toner Cartridge. Yellow (Y). The toner sensor detected that no toner cartridge (Yellow) was set.
Page 78 ■ Electrodes location of main body Charging (Corona wire) Developer roller Grid Cleaning roller Erase lamp lens Belt transfer roller Belt cleaning roller Paper dust cleaner Waste toner cleaner shaft Waste toner cleaner roller Fig. 2-5 ■ Electrodes location of the drum unit Erase lamp lens Fig.
Page 79 ■ Error code 6300 No Waste Toner Install the Waste Toner Box. The waste toner sensor detected that no waste toner box was set. < User Check > - Re-insert the waste toner box in the correct position. Step Cause Remedy High-voltage power supply PCB Replace the high-voltage power supply...
Page 80 ■ Error code 6801 Cooling Down Wait for a while The internal temperature sensor or side thermistor of the fuser unit detected a temperature higher than the specified value. < User Check > - Decrease the room temperature. - Place the machine away from a heater. Step Cause Remedy...
Page 81 ■ Error code 6A00 Drum ! Slide the Blue tab on Drum Unit. Electric discharge that may be caused by dirt on the corona wire of the drum unit was detected. Error code 6B01 Drum Stop Replace the Drum Unit. Electric discharge was detected when the number of the drum unit rotations had become more than twice of the upper limit.
Page 82 ■ Error code 6E00 Toner Error One or more Toner Cartridges are not detected. Pull out and reinsert all 4 Toner Cartridges. The develop release sensor detected the developer roller disengagement or engagement failure. Step Cause Remedy Connection failure of the develop Reconnect the develop release sensor release sensor harness harness.
Page 83 ■ Error code 7100 Jam Rear Open the Back Cover and remove the jammed paper, then press Go. After the registration rear sensor detects the end of paper pass and the specified period of time has passed, the eject sensor continues to detect paper pass. <...
Page 84 ■ Error code 7200 Jam MP Tray Remove the jammed paper from Multi Purpose Tray and press Go. When the paper is fed from the MP tray, after the MP registration front sensor detects paper pass, the registration rear sensor does not detect paper pass after a set period of time. <...
Page 85 ■ Error code 7300 Jam Tray 1 Remove the jammed paper from Tray 1. In the case of printing by feeding paper from the paper tray 1, after the T1 paper feed sensor detects paper pass, the registration front sensor does not detect paper pass after a set period of time.
Page 86 ■ Error code 7700 Jam 2-sided Pull out Tray 1 completely. Check inside the machine or open the Back Cover to remove the jammed paper. After the first side is printed in 2-sided printing mode, the registration front sensor does not detect paper pass after a set period of time.
Page 87 ■ Error code 8501 No Tray Reinstall tray 1 The T1 paper feed sensor detected that the paper tray 1 is open in 2-sided printing or printing by feeding paper from the T2 paper tray unit. (before the registration of printing in the engine) Error code 8505 No Tray Reinstall tray 1...
Page 88 ■ Error code 8A01 Size Error DX Specify the correct paper and press Go. The registration rear sensor detected that the fed paper was larger or smaller than the specified size in 2-sided printing. Error code 8A02 2-sided Disabled Load #S paper and press Go. The registration rear sensor detected that the length of the paper is too long and it may hit within the machine in 2-sided printing.
Page 89 ■ Error code 8D02 Small paper Open the Back Cover and then press Go. The paper size which is not supported by the output tray is set for printing from the printer driver. < User Check > - The size of paper actually loaded and the one specified from the driver shall be the one within the specified range.
Page 90 ■ Error code 9301 No Paper Load #S paper in #T. When paper was fed from the MP tray, the MP paper empty sensor detected that no paper was in the MP tray. < User Check > - Load paper to the MP tray. Step Cause Remedy...
Page 91 ■ Error code 9303 No Paper Load #S paper in #T. When paper was fed from the T2 paper tray unit, the T2 paper feed sensor detected that no paper was in the T2 paper tray unit. < User Check > - Load paper to the paper tray.
Page 92 ■ Error code 9701 Size Error DX Press Cancel. Specify the correct paper and load the same size paper as the Printer driver setting. For 2-sided printing, the tray whose paper size was not supported by 2-sided printing was selected. Error code 9702 Size Error Specify the correct paper size for Tray 1.
Page 93 ■ Error code 9801 Calibrate Calibration failed. Turn the power off and then back on again. Error occurred with the value measured during color density adjustment performed from the control panel. < User Check > - Check if the toner cartridges are set in the correct order of colors. - Replace the toner cartridge.
Page 94 ■ Error code 9803 Calibrate Calibration failed. Press Go, and try again. Density patch measurement ended unsuccessfully during color density adjustment performed from the control panel. Error code 9804 Calibrate Calibration failed. Press Go, and try again. Error occurred with the value measured during density sensor sensitivity calibration. <...
Page 95 ■ Error code 9A01 Registration Registration failed. Turn the power off and then back on again. Error occurred with the value measured during auto color registration performed from the control panel. < User Check > - Check if the toner cartridges are set in the correct order of colors. - Replace the toner cartridge.
Page 96 ■ Error code 9A03 Registration Registration failed. Press Go, and try again. Error occurred during patch data printing in auto color registration performed from the control panel. < User Check > - Check if the toner cartridges are set in the correct order of colors. - Replace the toner cartridge.
Page 97 ■ Error code C001 Log Access Error. Server Timeout, contact your administrator. Timeout occurred with access request sent to server due to incorrect server address, network disconnection, or inactive server. Error code C002 Log Access Error. Authentication Error, contact your administrator. User authentication is unavailable due to incorrect user name, incorrect password, or asynchronous date and time between the machine and server.
Page 98 ■ Error code C700 Out of Memory Press Cancel The memory is insufficient to expand the data of PC-Print. Error code C800 Print Data Full Print Data is full. Press Cancel and delete the previously stored data. The memory used to store secure print data exceeded the memory size for secure print data. <...
Page 99 ■ Error code D800 Touchscreen initialization failed Remove any material which is on the touchscreen. Error occurred during touch panel initialization. Error code D900 Communication between the panel PCB and main PCB is unavailable during touch panel initialization. Error code DA00 After the initialization of the panel PCB, no response was sent from the panel PCB for a period of time.
Page 100 ■ Error code E000 Print Unable E0 Turn off and on. Some ROM checksum error occurred. Error code E100 Print Unable E1 Turn off and on. Program error. < User Check > - Install the latest firmware. Step Cause Remedy Main PCB failure Replace the main PCB ASSY.
Page 101 ■ Error code F900 Machine Error F9 Setting by spec code is not entered. Step Cause Remedy During function code 74, power Enter the Setting by spec code again. is turned OFF. (Refer to “1.3.23 Setting by country (Function code 74)”...
Page 102: Troubleshooting For Paper Feeding Problems
Troubleshooting for 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. 4.2.1 No paper feeding from paper tray 1 <...
Page 103: No Paper Feeding From T2 Paper Tray Unit
4.2.2 No paper feeding from T2 paper tray unit < User Check > - Check if the paper is loaded into the paper tray correctly. - Check that too much paper is not loaded in the paper tray. - Turn back the paper loaded in the paper tray or change the orientation of the paper by 180°. - Check if the thickness of the paper is 60 to 105 g/m - Check whether the MP tray or paper tray 1 is specified for the paper feeding tray.
Page 104: No Paper Feeding From Mp Tray
4.2.3 No paper feeding from MP tray < User Check > - Check if the paper is loaded all the way into the MP tray. - Check that too much paper is not loaded in the MP tray. - Check if the machine is used with the MP tray support and MP flap are in closed state. - Check if the thickness of the paper is 60 to 163 g/m - Check whether the paper tray 1 or T2 paper tray unit is specified for the paper feeding tray.
Page 105: Multiple Sheets Of Paper Are Fed
4.2.4 Multiple sheets of paper are fed < User Check > - Check that too much paper is not loaded in any paper tray. - Check if the paper is loaded into each paper tray correctly. - Turn back the paper loaded in each paper tray or change the orientation of the paper by 180°.
Page 106: Paper Curls
4.2.7 Paper curls < User Check > - Check if the size of paper specified from the driver is matched with the one actually loaded. - Select "Reduce Paper Curl" in the driver. - Check if the paper is loaded into each paper tray correctly. - Print with the envelope lever is lowered.
Page 107 4.2.9 Paper jam ■ Paper jam at the paper tray 1 < User Check > - Check if the paper is loaded into the paper tray 1 correctly. - Turn back the paper loaded in the paper tray 1 or change the orientation of the paper by 180°. - Adjust the paper guide corresponding to the paper size.
Page 108 ■ Paper jam at the T2 paper tray unit < User Check > - Check if the paper is loaded into the T2 paper tray unit correctly. - Turn back the paper loaded in the T2 paper tray unit or change the orientation of the paper by 180°.
Page 109 ■ Paper jam at the MP tray < 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 110 ■ Paper jam at the eject section < User Check > - Check if the paper is loaded into each paper tray correctly. - Turn back the paper loaded in each paper tray or change the orientation of the paper by 180°. - Adjust each paper guide in accordance with the paper size.
Page 111 Troubleshooting for Image Defects 4.3.1 Image defect examples Light on the whole One color is light (2-90) Faulty registration (2-91) Dark (2-92) page (2-89) Poor fixing (2-92) Completely Image distortion (2-93) All one color (2-94) blank (2-93) Dirt on back side of paper (2-95) Vertical streaks (2-96) Vertical streaks in a dark background (2-97) Horizontal stripes...
Page 112 4.3.2 Troubleshooting image defect Image defect related problems 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. ■...
Page 113 ■ One color is light <User Check> - Check the machine’s environment. High temperature and high humidity or low temperature and low humidity conditions can cause this problem. - Adjust the color calibration from the control panel. - Replace the drum unit with a new one. - Replace the toner cartridge with a new one.
Page 114 ■ Electrodes location of belt unit Fig. 2-9 ■ Faulty registration <User Check> - Check whether appropriate paper type is selected on the driver. Step Cause Remedy Registration rear actuator Re-assemble the registration rear actuator. coming off Laser unit failure Replace the laser unit.
Page 115 ■ Dark <User Check> - Check the machine’s environment. High temperature and high humidity or low temperature and low humidity conditions can cause this problem. - After a new toner cartridge is detected, check if other toner cartridge is not inserted. - Execute density adjustment from the control panel.
Page 116 ■ Completely blank <User Check> - Clean the corona wire of all four colors on the drum unit. - Replace the drum unit with a new one. - Replace the toner cartridge with a new one. - Install the latest firmware. Step Cause Remedy...
Page 117 ■ All one color <User Check> - Clean the corona wire of all four colors on the drum unit. - Replace the drum unit with a new one. Step Cause Remedy Dirt on the electrodes of the Clean the electrodes of the main body and main body and the drum unit the drum unit.
Page 118 ■ Dirt on back side of paper <User Check> - This symptom might stop occurring after making several prints. - Replace the toner cartridge with a new one. - Replace the belt unit. - Replace the waste toner box. Step Cause Remedy Dirt in the paper feed system...
Page 119 ■ Vertical streaks <User Check> - Clean the corona wire of all four colors on the drum unit. - Return the cleaning tab of the corona wire to the position. - This symptom might stop occurring after making several prints. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab.
Page 120 ■ Vertical streaks in a dark background <User Check> - Clean the corona wire of all four colors on the drum unit. - This symptom might stop occurring after making several prints. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab. - Leave the machine for a while as the power remains ON.
Page 121 ■ Light vertical steaks and bands on one color image <User Check> - Clean the corona wire of all four colors on the drum unit. - Check if dust adheres to the area of the toner cartridge corresponding to the location where the white vertical streak appears.
Page 122 ■ Faint print <User Check> - Check that the machine is set on a level surface. - Wipe the scanner windows of the laser unit with a soft, lint-free cloth. - Replace the drum unit with a new one. - Replace the toner cartridge with a new one. Step Cause Remedy...
Page 123 ■ White spots on one color image <User Check> - Check if the fuser fan and/or blower are not blocked. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab. - Replace the drum unit with a new one. - Replace the toner cartridge with a new one.
Page 124 ■ One color spots or dirt <User Check> - Check if damp paper is used. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab. - Replace the drum unit with a new one. - Replace the toner cartridge with a new one.
Page 125 ■ One color band <User Check> - Clean the corona wire of all four colors on the drum unit. - Return the cleaning tab of the corona wire to the position. - This symptom might stop occurring after making several prints. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab.
Page 126 ■ Ghost <User Check> - Check the machine’s environment. High temperature and high humidity or low temperature and low humidity conditions can cause this problem. - Check whether appropriate paper type is selected on the driver. - Select "Improve Toner Fixing Mode" in the driver. - Make a print in the color mode.
Page 127 ■ Unstable color density <User Check> - Make a print on a different type of paper. - Replace the belt unit with a new one. - Replace the waste toner box with a new one. - Replace the toner cartridge with a new one. - Replace the drum unit with a new one.
Page 128 ■ Print crease <User Check> - Check the machine’s environment. High temperature and high humidity or low temperature and low humidity conditions can cause this problem. - Change the paper to thick paper. - Check if paper is not damp. - Check if the thickness of the paper is properly set in the driver.
Page 129 (2) Click the [More Info...] button in the [About This Mac] dialog box. (3) Select [USB] under the [Hardware] in [Contents] on the left side. (4) Select the machine [HL-XXXX] from [USB Device Tree]. (5) Check [Product ID] in [HL-XXXX]. ■ Product ID (Hexadecimal) HL-L8250CDN: 0065h HL-L8350CDW: 0066h HL-L9200CDW: 0067h 2-106 Confidential...
Page 130 Troubleshooting for Network Problems 4.5.1 Cannot make a print through network connection < User Check > - Check the descriptions in the network User’s guide. - Check the network connection. - Perform network reset. (Refer to User's guide.) - Check the LAN cable. Step Cause Remedy...
Page 131 Troubleshooting for Control Panel Problems 4.6.1 Nothing is displayed on the LCD/LED < User Check > - Turn the power OFF/ON. Step Cause Remedy The version of the panel Install the latest panel firmware and main firmware and the main firmware.
Page 132 4.6.2 Unable to perform panel operation < User Check > - Turn the power OFF/ON. Step Cause Remedy The version of the panel Install the latest panel firmware and main firmware and the main firmware. firmware do not match. (Model with touch panel) Deviated adjustment of touch Refer to “1.3.14 Adjustment of touch panel...
Page 133 Troubleshooting for Toner Cartridge and Drum Unit Problems 4.7.1 New toner not detected < User Check > - Check if the supplied toner cartridge is installed. - Be sure to set a new toner cartridge. - Install a genuine toner cartridge. Step Cause Remedy...
Page 134 4.7.4 Drum error < User Check > - Clean the corona wire. - Replace the drum unit with a new one. Step Cause Remedy Dirt on the GRID terminals or Clean the GRID terminals and CHG CHG terminals of the main terminals of the main body and the drum unit.
Page 135 Troubleshooting for Fuser Unit Problems 4.8.1 Fuser unit failure Step Cause Remedy Connection failure of the Reconnect the center thermistor harness. center thermistor harness Connection failure of the side Reconnect the side thermistor harness. thermistor harness Connection failure of the Reconnect the heater harness.
Page 136 4.10 Troubleshooting for PCB Problems 4.10.1 Main PCB failure < User Check > - Turn the power OFF/ON. - Install the latest firmware. - Check if PC-print is not prohibited. - Check the print restricted ID. - Replace the damaged DIMM. - Check if print data is not damaged.
Page 137 4.11 Troubleshooting for Other Problems 4.11.1 Cannot make print < User Check > - Turn the power OFF/ON. - Check if the maximum number of pages that can be printed is exceeded. - Check if PC-print is not prohibited. - Check the print restricted ID. - Check if print data is not damaged.
Page 138 CHAPTER 3 DISASSEMBLY AND ASSEMBLY SAFETY PRECAUTIONS To avoid creating secondary problems by mishandling, follow the warnings and precautions below during maintenance work. WARNING Some parts inside the machine are extremely hot immediately after the machine is used. When opening the front cover or back cover to access any parts inside the machine, never touch the shaded parts shown in the following figures.
Page 139 PACKING T2 styrofoam pad ASSY T2 styrofoam pad ASSY Remove sheet BC2 ASSY T2 carton Silica gel Accessory bag Set guide Develop spacer R AC cord Develop spacer L Silica gel sheet Polystyrene pad ASSY Drum stopper R Printer Cleaner lock R Drum stopper L Polystyrene pad ASSY Develop stopper...
Page 140 SCREW CATALOGUE Taptite bind B Taptite flat B Taptite flat B Taptite bind B M3x10 M3x8 Taptite bind B Taptite pan M3x10 Taptite pan B M4x14 Taptite, bind B M4x10 Screw pan (S/P washer) Taptite bind B Screw pan (S/P washer) M4x12 M3.5x6 Taptite cup B...
Page 141 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 B M4x12 0.8±0.1 (8±1) Fuser cover R Taptite bind B M4x12 0.8±0.1 (8±1)
Page 142 Tightening torque Location of screw Screw type Q' ty · · m (kgf FG harness of the Inlet Screw pan (S/P washer) M3.5x6 0.5±0.05 (5±0.5) harness ASSY Inlet harness ASSY Taptite flat B M3x10 0.5±0.05 (5±0.5) Drive ground plate Screw pan (S/P washer) M3.5x6 0.5±0.05 (5±0.5) LVPS plate Taptite cup S M3x8 SR...
Page 143 LUBRICATION The kind of the lubricating oil Lubrication point Quantity of lubrication (Maker name) FLOIL BG-10KS Top cover ASSY 1.0 to 1.5 mm dia. ball (Kanto Kasei) BG1.0 to 1.5 BG1.0 to 1.5 Top cover ASSY Top cover ASSY BG1.0 to 1.5: FLOIL BG-10KS (1.0 to 1.5 mm dia. ball) Confidential...
Page 144 OVERVIEW OF GEARS When ordering spare parts, please refer to Parts reference list. ■ Main frame L ASSY <Layout view> <Development view> <Name of gears> LY0299 Pinch roller drive gear Z21M05 LY1816 Registration gear Z26-23 LY0164 PF drive gear 21 LY0166 PP gear 14 55 LY6128...
Page 145 HARNESS ROUTING Top Cover ASSY Front Panel control PCB ASSY Top cover ASSY Model with touch panel only Model without Wireless LAN PCB touch panel only Panel PCB harness ASSY (WH) Hook Hook Main PCB ASSY CN23 CN18 Hook LCD panel harness ASSY Main wireless (WH) LAN harness...
Page 146 Process Drive Unit, Front Cover Sensor, Main Drive Unit Wireless LAN Front cover sensor harness (RD, WH) Front cover sensor Main PCB ASSY Hook Hook cable rack Hook Front Hook Process Develop drive unit clutch harness CN10 (BK) PF cable rack CN12 T1 solenoid CN13...
Page 147 Paper Eject ASSY Paper eject origin sensor “A” “B” “C” Paper eject ASSY Hook Hook Hook “D” Switch back solenoid Hook Front Hole Paper eject origin sensor harness (WH) Hole Hook Hook “A” “B” Switch back solenoid Paper eject ASSY “C”...
Page 148 Back Cover Sensor ASSY “A” A view Front <A view> Front Hook Back cover Main PCB ASSY sensor ASSY Hole CN33 “A” Hole Hook Back cover sensor harness Main frame L ASSY Eject Sensor PCB ASSY, Fuser Unit Guide A view Fuser unit Front “A”...
Page 149 Registration Mark Sensor Unit A view <A view> Front Front Registration mark sensor Hole R PCB harness Main PCB ASSY Hook (RD, WH, BL) “A” Registration mark sensor unit CN37 “A” CN38 Hole Main frame L ASSY Registration mark sensor L PCB harness (RD, WH, BL) Fuser Fan, Power Fan Front...
Page 150 Low-voltage Power Supply PCB Unit Front Fuser unit B view “A” Hook LVPS-heater harness ASSY Hook Guide Hook A view Hole Low-voltage power Hook supply PCB unit Core Inlet harness ASSY FG harness of the Inlet harness ASSY <A view> <B view>...
Page 151 MP Paper Empty/Registration Front Sensor PCB ASSY MP upper cover ASSY MP paper empty/ registration front sensor PCB ASSY MP paper empty/ registration front sensor PCB ASSY MP sensor harness ASSY Hook (RD, WH, BL, YL) Hole Hook Front Registration/pinch roller gear bushing MP upper cover ASSY PF cable rack...
Page 152 Paper Feed Unit Hook Hook Hook T1 paper feed sensor PCB ASSY Registration front/ rear sensor PCB ASSY Paper feed unit Registration front/ rear sensor PCB ASSY Front T1 paper feed sensor PCB ASSY MP solenoid Hook Hole “A” “B” “C”...
Page 153 Blower, Waste Toner Sensor Front High-voltage power supply PCB ASSY Hook Blower harness (RD, WH, BL) Hook Hook Blower Waste toner sensor harness ASSY Hook (YL) Harness colors may be changed for any reason. 3-16 Confidential...
Page 154 DISASSEMBLY FLOW Disassembly / Re-Assembly (second) 9.13 Front cover 9.8 Side cover R release button/ 9.1 Lift gear 46/ Front cover release 9.2 Support flap Gear Z19M10 45/45 button spring 25/25 9.3 Back Cover/ Back Cover Stopper 9.7 Side cover L Arm L/Back Cover ASSY Stopper Arm R...
Page 155 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. (2) Remove - the Paper tray, - the Toner cartridge, - the Drum unit, - the Belt unit,...
Page 156 Lift Gear 46/Gear Z19M10 (1) Lift up the Plate. Release the Hook and remove the Lift gear 46 from the Plate up plate. Plate Lift gear 46 Paper tray 1 Hook Plate up plate Fig. 3-1 (2) Remove the Gear Z24M10Z14M75 from the Paper tray 1. (3) Remove the Gear Z19M10 from the Paper tray 1.
Page 157 Support Flap (1) Release the two Pins and remove the Support flap from the Main body. Support flap Support flap Main body Fig. 3-3 3-20 Confidential...
Page 158 Back Cover/Back Cover Stopper Arm L/ Back Cover Stopper Arm R (1) Open the Back cover. Main body Back cover <Back side> Fig. 3-4 (2) Remove the Back cover stopper arm L/R from the Main body. Main body Back cover stopper arm L Back cover stopper arm L Back cover stopper arm R Back cover...
Page 159 (3) Remove the Shaft of the Back cover from the Bush on the right side of the Main body. Main body Shaft Bush Back cover <Back side> Fig. 3-6 (4) Remove the Back cover. Main body <Back side> Back cover Fig.
Page 160 (5) Remove the Back cover stopper arm L from the Back cover. (6) Remove the Back cover stopper arm R from the Back cover. Back cover stopper arm L Back cover stopper arm R Back cover Back cover stopper arm R Back cover Center Fig.
Page 161 Fuser Cover ASSY (1) Open the Back flapper holder. Release the two Pins and remove the Back flapper holder from the Main body. Main body <Back side> Back flapper holder Fig. 3-9 (2) Remove the two Taptite bind B M4x12 screws from the Fuser cover L. (3) Release the one Hook and one Pin and remove the Fuser cover L from the Main body.
Page 162 (4) Release the lock of the Fuser cover lock lever L/R to open the Fuser cover ASSY. Main body Fuser cover lock lever L Fuser cover ASSY <Back side> Fuser cover lock lever R Fig. 3-11 (5) Slide the Fuser cover ASSY in the direction of the arrow 5a and remove it to the front. Main body Fuser cover ASSY <Back side>...
Page 163 Cleaner Pinch Roller S ASSY (1) Remove the Cleaner roller spring from the Hook of the Fuser cover ASSY. Hook Fuser cover ASSY Cleaner roller spring Cleaner pinch roller S ASSY Fig. 3-13 (2) Remove the Cleaner roller spring from the two Pins of the Fuser cover ASSY. Remove the Cleaner pinch roller S ASSY and Cleaner roller spring from the Fuser cover ASSY.
Page 164 (3) Remove the Cleaner pinch roller S ASSY from the Cleaner roller spring. Cleaner roller spring Cleaner pinch roller S ASSY Fig. 3-15 (4) Remove the other three Cleaner pinch roller S ASSYs in the same way. 3-27 Confidential...
Page 165 Fuser Unit (1) Remove the two Taptite bind B M4x12 screws from the Fuser cover R. (2) Release the two Hooks and remove the Fuser cover R from the Main body. Main body Hook Fuser cover R <Back side> Taptite bind B M4x12 Fig.
Page 166 (4) Disconnect the Electrode terminal of the Main body from the Electrode terminal of the Fuser unit. Fuser unit Electrode terminal of the Fuser unit Electrode terminal of the Main body Main body <Back side> Fig. 3-18 (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...
Page 167 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. 3-20 Harness routing: Refer to “...
Page 168 Side Cover L ASSY (1) Open the Front cover. Main body Front cover Fig. 3-21 (2) Remove the one Taptite B 3x6 screw and the one Taptite bind B M4x12 screw from the front of the Side cover L ASSY. (3) Remove the Taptite bind B M4x12 screw from the side of the Side cover L ASSY.
Page 169 (4) Remove the two Taptite bind B M4x12 screws from the back of the Side cover L ASSY. Side cover L ASSY Taptite bind B M4x12 <Back side> Fig. 3-23 3-32 Confidential...
Page 170 (5) Release the Hooks 1 to 8 in numerical order. Move the Side cover L ASSY in the direction of the arrow 5a and release the Hook 9 and remove the Side cover L ASSY from the Main body. Side cover L ASSY Hook 8 Hook 9 Hook 7...
Page 171 Side Cover R (1) Remove the one Taptite B 3x6 screw and the one Taptite bind B M4x12 screw from the front of the Side cover R. Taptite B 3x6 Side cover R <Front side> Taptite bind B M4x12 Fig. 3-26 (2) Remove the two Taptite bind B M4x12 screws from the back of the Side cover R.
Page 172 (3) Release the Hooks 1 to 7 in numerical order. Move the Side cover R in the direction of the arrow 3a and release the Hook 8 and remove the Side cover R from the Main body. Side cover R Hook 8 Hook 7 Hook 6...
Page 173 Note: As the Spacer tends to come off, be careful not to lose it. Spacer High-voltage power supply PCB ASSY Spacer Spacer Spacer <Right side> Fig. 3-30 3-36 Confidential...
Page 174 Duplex Tray (1) Remove the two Taptite cup B M3x12 screws and remove the Duplex tray from the Main body. Taptite cup B M3x12 Main body <Back side> Duplex tray Taptite cup B M3x12 Fig. 3-31 3-37 Confidential...
Page 175 9.10 MP Cover ASSY/MP Paper Guide ASSY (1) Close the Front cover. (2) Open the MP cover ASSY. Front cover MP cover ASSY Fig. 3-32 (3) Release the Pin of the MP link L from the MP cover ASSY. (4) Release the Pin of the MP link R from the MP cover ASSY. MP link R MP cover ASSY MP link L/MP link R...
Page 176 (5) Release the Pin of the MP link L from the MP paper guide ASSY. (6) Release the Pin of the MP link R from the MP paper guide ASSY. MP link R MP paper guide ASSY MP paper guide ASSY MP link L MP link L/MP link R Fig.
Page 177 (8) Release the two Pins and remove the MP cover ASSY from the Front cover. Front cover MP cover ASSY Fig. 3-36 3-40 Confidential...
Page 178 9.11 MP Link L/MP Link R (1) Remove the MP link L from the Front cover. (2) Remove the MP link R from the Front cover. MP link L Front cover MP link R MP link L Fig. 3-37 3-41 Confidential...
Page 179 9.12 Front Cover (1) Remove the Front cover damper spring from the Spring hook of the Main frame R ASSY. (2) Remove the Taptite B 3x6 screw and remove the Front cover damper spring from the Front cover. Spring hook Front cover Taptite B 3x6 Main frame R ASSY...
Page 180 (5) Release the three Bosses and remove the Front cover from the Main body. Boss Main body Front cover Boss Fig. 3-40 3-43 Confidential...
Page 181 9.13 Front Cover Release Button/ Front Cover Release Button Spring (1) Release the Hook, tilt the Front cover release button in the direction of the arrow 1b, and remove it from the Boss. Assembling Note: Align the Hole of the Front cover release button to the Boss of the Front cover and insert it into the Hole.
Page 182 (3) Remove the Front cover release button spring from the Front cover. Front cover Boss Front cover release button spring Fig. 3-43 Assembling Note: When assembling the Front cover release button spring, attach “A” of the Front cover release button spring to the cutout of the Front cover release button. Front cover release button “A”...
Page 183 9.14 Top Cover ASSY (1) Remove the four Screw bind M3x8 screws and remove the Main shield cover plate ASSY from the Main body. Screw bind M3x8 (Upper side) Main shield cover plate ASSY Screw bind M3x8 (Lower side) Main body <Left side>...
Page 184 (3) Remove the Taptite cup S M3x8 SR screw from the front of the Top cover ASSY. Top cover ASSY Taptite cup S M3x8 SR <Front side> Fig. 3-47 Assembling Note: Never fail to tighten the screw if the machine to be repaired is a model with a screw. (4) Remove the two Taptite bind B M4x12 screws from the back of the Top cover ASSY.
Page 185 (5) Release the three Hooks 1 and two Bosses. Release the other six Hooks and remove the Top cover ASSY from the Main body. Hook Top cover ASSY Boss Hook Hook 1 Boss Main body Hook Main body Fig. 3-49 Harness routing: Refer to “...
Page 186 9.15 Wireless LAN PCB (1) Turn the Top cover ASSY upside down. (2) Release the Pin and remove the Wireless LAN PCB from the Top cover ASSY. Top cover ASSY Wireless LAN PCB Fig. 3-50 (3) Disconnect the Main Wireless LAN harness ASSY from the Wireless LAN PCB. Main Wireless LAN harness ASSY Wireless LAN PCB Fig.
Page 187 9.16 Panel ■ Model with touch panel 9.16.1 Panel control PCB ASSY (1) Disconnect the Panel relay PCB flat cable from the Panel control PCB ASSY. (2) Disconnect the Key PCB flat cable from the Panel control PCB ASSY. Panel relay PCB flat cable Panel control PCB ASSY Key PCB flat cable...
Page 188 (3) Release the four Hooks and remove the Panel control PCB ASSY from the Top cover ASSY. Panel control PCB ASSY Top cover ASSY Hook Hook Fig. 3-53 (4) Disconnect the Panel control PCB harness ASSY from the Panel control PCB ASSY. Panel control PCB harness ASSY Panel control PCB ASSY Fig.
Page 189 9.16.1.1 Panel case ASSY/Key PCB flat cable/LCD panel ASSY (1) Release the Hook and remove the Flat core from the Panel cover case lower. (2) Pull out the Flat core from the Panel relay PCB flat cable. (3) Remove the Taptite cup B M3x10 screw and remove the FG wire. Taptite cup B M3x10 FG wire Panel relay...
Page 190 <How to fold the Panel relay PCB flat cable> <To be connected to LCD PCB> Contact plane (6.5 mm) 12.1±1 mm 18.6±1 mm (21.9 mm) 40.5±1 mm (7 mm) 47.5±1 mm (8.2 mm) 55.7±1 mm (8.9 mm) 64.6±1 mm (6.9 mm) 71.5±1 mm (6.5 mm) 78±1 mm...
Page 191 (4) Remove the two Taptite bind B M4x12 screws from the Panel cover case lower. Release the three Hooks and remove the Panel cover case lower from the Top cover ASSY. Hook Taptite bind B M4x12 Panel cover case lower Hook Top cover ASSY Fig.
Page 192 (6) Disconnect the Key PCB flat cable from the Key PCB ASSY. Key PCB flat cable Key PCB ASSY Fig. 3-59 Note: - After disconnecting flat cables, check that each cable is not damaged at its end or short- circuited. - When connecting flat cables, do not insert them at an angle.
Page 193 <How to fold the Key PCB flat cable> <To be connected to Panel control PCB ASSY> (10 mm) Contact plane 15±1 mm Supporting tape (Reverse side) (60 mm) UL symbol 75±1 mm marking side (14 mm) 89±1 mm (64 mm) Supporting tape (Reverse side) (153 mm)
Page 194 (7) Release the two Pins and remove the LCD panel ASSY from the Panel case ASSY. LCD panel ASSY LCD panel ASSY Panel case ASSY Panel case ASSY Fig. 3-61 3-57 Confidential...
Page 195 ■ Model without touch panel 9.16.2 Panel cover ASSY (1) Remove the two Taptite bind B M4x12 screws from the Panel cover case lower. (2) Release the three Hooks and remove the Panel cover case lower from the Top cover ASSY. Hook Taptite bind B M4x12 Panel cover case lower...
Page 196 9.16.2.1 Panel PCB ASSY (1) Release the five Hooks and remove the Panel PCB ASSY from the Panel cover ASSY. Note: Be careful not to lose the Panel light guide. Panel PCB ASSY Hook Panel cover ASSY Hook Panel light guide Fig.
Page 197 (3) Disconnect the Panel PCB harness ASSY (CN1) from the Panel PCB ASSY. Panel PCB harness ASSY Panel PCB ASSY Fig. 3-66 9.16.2.2 Rubber key printed ASSY (1) Remove the Rubber key printed ASSY from the Panel cover ASSY. Rubber key printed ASSY Panel cover ASSY Fig.
Page 198 9.16.2.3 LCD (1) Release the three Hooks and remove the Backlight guide from the Panel cover ASSY. Backlight guide Hook Hook Panel cover ASSY Fig. 3-68 (2) Remove the Diffusion film from the LCD. (3) Remove the LCD from the Panel cover ASSY. Diffusion film Panel cover ASSY Fig.
Page 199 9.17 USB Host Relay PCB ASSY/USB Cover Printed ASSY (1) Remove the two Taptite bind B M4x12 screws and remove the USB host relay PCB ASSY from the USB cover printed ASSY. (2) Remove the USB cover printed ASSY from the Top cover ASSY. Taptite bind B M4x12 USB host relay PCB ASSY USB cover...
Page 200 9.18 Main PCB ASSY Note: Backup of machine information Before starting disassembly work, back up the machine information and user setting information. (Refer to “1.3.11 Backup of machine information (Function code 41)” in Chapter 5.) After replacing the PCB, restore the backup data to a new PCB. (1) Disconnect the twenty two Connectors (CN2, CN3, CN4, CN7, CN8, CN9, CN10, CN11, CN12, CN13, CN14, CN21, CN28, CN30, CN31, CN32, CN33, CN36, CN37, CN38, CN39 and CN41) and three Flat cables (CN1, CN17 and CN27) from the Main PCB...
Page 201 (2) Remove the two Screw bind M3x6 screws and remove the Main PCB ASSY from the Process drive unit. Process drive unit <Back side> Screw bind M3x6 (Upper side) Main PCB ASSY Screw bind M3x6 (Lower side) Fig. 3-73 Note: Note that the tightening torque is different between the upper side and lower side of the Screw bind M3x6.
Page 202 9.19 Laser Unit Flat Cable/Laser Unit (1) Remove the six Taptite bind B M4x12 screws and four Taptite cup S M3x6 SR screws, and remove the Scanner cover plate from the Main body. Assembling Note: When assembling the six screws of the Taptite bind B M4x12, be sure to assemble them in the order shown in the figure.
Page 203 Note: - After disconnecting flat cables, check that each cable is not damaged at its end or short-circuited. - When connecting flat cables, do not insert them at an angle. After insertion, check that the cables are not at an angle. <How to fold the Laser unit flat cable>...
Page 204 (3) Remove the five Taptite cup S M3x6 SR screws and remove the four Scanner holders from the Scanner plate. Taptite cup S M3x6 SR Taptite cup S M3x6 SR Scanner holder Taptite cup S M3x6 SR Taptite cup S M3x6 SR Scanner holder Scanner holder Scanner plate...
Page 205 (4) Disconnect the Connector (CN8). (5) Remove the Laser unit from the Scanner plate. Laser unit Scanner plate <Front side> Fig. 3-79 3-68 Confidential...
Page 206 9.20 Front Cover Sensor (1) Release the wiring of the Front cover sensor. (2) Release the two Hooks and remove the Front cover sensor from the Main body. Hook Hook Front cover sensor Main body <Front side> Fig. 3-80 Harness routing: Refer to “...
Page 207 9.21 Process Drive Unit/Fuser Drive Gear Z25 (1) Release all the wiring from the Wireless LAN cable rack. (2) Release the three Hooks and remove the Wireless LAN cable rack from the Main body. Hook Main body Wireless LAN cable rack <Left side>...
Page 208 (5) Remove the two Screw bind M3x8 screws from the Main PCB plate. Release the two Hooks and remove the Main PCB plate from the Main body. Hook Main body Main PCB plate Screw bind M3x8 <Left side> Fig. 3-83 (6) Release all the wiring from the PF cable rack.
Page 209 (8) Remove the Mono color cam from the Main body. Mono color cam <Front side> Main body Fig. 3-85 Assembling Note: When assembling the Mono color cam, be sure to check that the Forced develop release link is at “A” position. If you attach the Mono color cam as the Forced develop release link is at “B”...
Page 210 (9) Release all the wiring from the Cable rack. (10) Release the six Hooks and slide the Cable rack in the direction of the arrow and remove it from the Main body. Process drive unit Hook Hook Cable rack Hook Hook Hook <Left side>...
Page 211 (12) Remove the five Taptite bind B M4x12 screws, one Taptite pan (washer) B M4x12 DA screw, and the one Screw pan (S/P washer) M3.5x6 screw from the Process drive unit. Release the two Hooks and remove the Process drive unit from the Main body. Main body Hook Screw pan (S/P washer) M3.5x6...
Page 212 (13) Release the Hook and remove the Fuser drive gear Z25 from the Process drive unit. Hook Fuser drive gear Z25 Process drive unit Fig. 3-90 Harness routing: Refer to “ Laser Unit”, “ Process Drive Unit, Front Cover Sensor, Main Drive Unit”, “...
Page 213 9.22 Main Drive Unit (1) Release all the wiring from the Main drive unit. (2) Remove the four Taptite bind B M4x12 screws from the Main drive unit. Release the Hook and remove the Main drive unit from the Main body. Hook Main drive unit Taptite...
Page 214 9.23 Develop Release Drive Unit (1) Release the wiring of the Develop release drive unit. (2) Remove the three Taptite bind B M4x12 screws from the Develop release drive unit. Release the three Hooks and remove the Develop release drive unit from the Main body. Hook Hook Develop release drive unit...
Page 215 9.24 Develop Release Sensor PCB ASSY (1) Release the Hook and remove the Develop release sensor PCB ASSY from the Main body. Main body Hook Develop release sensor PCB ASSY <Left side> Fig. 3-94 3-78 Confidential...
Page 216 9.25 Toner/New Sensor PCB ASSY (1) Release the two Hooks and remove the Forced develop release link from the Main body. Hook Forced develop release link Hook Forced develop release link Forced develop release link <Left side> Main body Fig. 3-95 (2) Release the six Hooks and remove the Toner/new sensor PCB ASSY from the Main body.
Page 217 9.26 Fuser Fan (1) Disconnect the Connector (CN4) from the High-voltage power supply PCB ASSY. High-voltage power supply PCB ASSY <Right side> Fuser fan Fig. 3-97 (2) Slightly rotate the Fuser fan in the direction of the arrow 2a and pull it out from the Main body.
Page 218 9.27 Paper Eject ASSY (1) Disconnect the two Connectors (CN1 and CN2) from the High-voltage power supply PCB ASSY. (2) Release the wiring of the High-voltage main harness ASSY. High-voltage power supply PCB ASSY Paper eject ASSY <Right side> Fig. 3-99 (3) Remove the four Taptite bind B M4x12 screws and remove the Paper eject ASSY from the Main body.
Page 219 9.28 Toner Filter ASSY (1) Release the five Hooks and remove the Toner filter ASSY from the Paper eject ASSY. Paper eject ASSY Hook Toner filter ASSY Hook Hook Fig. 3-101 3-82 Confidential...
Page 220 9.29 Paper Eject Origin Sensor (1) Remove the Eject ground wire 1 from the Paper eject ASSY. Paper eject ASSY Eject ground wire 1 Fig. 3-102 (2) Release the five Hooks and remove the Eject ground wire 2 from the Paper eject ASSY. Paper eject ASSY <A view>...
Page 221 Assembling Note: After assembling the Eject ground wire 1 and Eject ground wire 2, check the conduction between the Middle roller shaft and the Cooling roller shaft. Middle roller ASSY Cooling roller shaft Middle roller shaft Eject cooling roller ASSY Paper eject ASSY Fig.
Page 222 9.30 Back Cover Sensor ASSY (1) Release the wiring of the Back cover sensor ASSY. (2) Release the two Hooks and remove the Back cover sensor ASSY from the Main body. Back cover sensor ASSY Hook Hook Back cover sensor ASSY Hook Hook Main body...
Page 223 9.31 Eject Sensor PCB ASSY (1) Release the wiring of the Eject sensor PCB ASSY. (2) Release the Hook and remove the Eject sensor PCB ASSY from the Main body. Hook Hook Eject sensor PCB ASSY A view <A view> Hook Hook <Back side>...
Page 224 9.32 Registration Mark Sensor Unit (1) Release the wiring of the Registration mark sensor unit. (2) Remove the two Taptite bind B M3x10 screws from the Registration mark sensor unit. Release the two Bosses and remove the Registration mark sensor unit from the Main body. Boss Boss Main body...
Page 225 9.33 Power Fan (1) Disconnect the Connector (CN5) from the High-voltage power supply PCB ASSY. High-voltage power supply PCB ASSY <Back side> Power fan Fig. 3-110 (2) Slightly rotate the Power fan in the direction of the arrow 2a and pull it out from the Main body.
Page 226 9.34 Low-voltage Power Supply PCB Unit (1) Remove the Screw pan (S/P washer) M3.5x6 screw and remove the FG harness of the Inlet harness ASSY from the LVPS plate. (2) Remove the Taptite flat B M3x10 screw and remove the Inlet harness ASSY from the Main body.
Page 227 (5) Remove the Screw pan (S/P washer) M3.5x6 screw from the Drive ground plate. (6) Release the Boss and remove the Drive ground plate from the Low-voltage power supply PCB unit. (7) Release the wiring of the LVPS-main harness ASSY. Drive ground plate <Back side>...
Page 228 (9) Disconnect the Connector (CN101) of the LVPS-main harness ASSY from the Low-voltage power supply PCB unit. Connector of the LVPS-main harness ASSY CN101 Low-voltage power supply PCB unit Fig. 3-115 (10) Remove the five Taptite cup S M3x6 SR screws and remove the Low-voltage power supply PCB unit from the LVPS plate.
Page 229 9.35 MP Paper Empty Actuator A ASSY/ MP Paper Empty Actuator B (1) Press “A” to release the Hook and remove the MP upper frame cover from the MP upper cover ASSY. “A” MP upper frame cover Hook <Front side> MP upper cover ASSY Fig.
Page 230 (3) Release the Hook 1 and rotate the MP holder bushing in the direction of the arrow. (4) Release the Hook 2 and remove the MP holder bushing from the MP upper cover ASSY. Hook 1 Hook 2 MP holder bushing Hook 1 Hook 2 <Front side>...
Page 231 (6) Remove the Registration gear Z26-23 from the Registration/pinch roller gear bushing. Registration/pinch roller gear bushing <Left side> Registration gear Z26-23 Fig. 3-121 (7) Remove the Pinch roller drive gear Z21M05 from the Registration/pinch roller gear bushing. Registration/pinch roller gear bushing Pinch roller drive gear Z21M05 <Left side>...
Page 232 (8) Release the Hook and remove the Registration/pinch roller gear bushing from the Main body. (9) Release the wiring of the Registration/pinch roller gear bushing. Main body Hook Registration/pinch roller gear bushing <Left side> Fig. 3-123 (10) Slide the MP drive shaft as shown in the figure. (11) Remove the two Taptite bind B M3x10 screws from the MP upper cover ASSY.
Page 233 Assembling Note: When assembling the MP upper cover ASSY, attach “A” of the MP lift arm A to the MP lift lever. MP lift lever MP upper cover ASSY MP lift arm A “A” Fig. 3-125 (12) Release the five Hooks and remove the Sensor cover MP from the MP upper cover ASSY. MP upper cover ASSY Hook Hook...
Page 234 (13) Release the two Hooks and remove the MP paper empty actuator A ASSY from the MP upper cover ASSY. MP paper empty actuator B MP paper empty actuator A ASSY MP paper empty actuator A ASSY MP paper empty actuator B Hook MP upper cover ASSY...
Page 235 9.36 MP Paper Empty/Registration Front Sensor PCB ASSY (1) Release the Hook and remove the MP separation roller bushing from the MP drive shaft. MP drive shaft MP separation roller bushing Hook Fig. 3-129 (2) Release the two Hooks and remove the MP registration front actuator spring from the MP registration front actuator.
Page 236 (3) Pull out the MP drive shaft and remove the MP registration front actuator from the MP upper cover ASSY. MP registration front actuator MP drive shaft MP upper cover ASSY Fig. 3-131 (4) Release the wiring of the MP paper empty/registration front sensor PCB ASSY. (5) Remove the Taptite bind B M3x8 screw and remove the MP paper empty/registration front sensor PCB ASSY from the MP upper cover ASSY.
Page 237 9.37 Paper Feed Unit/Joint Pin (1) Push the T1 lift arm to the back and remove “B” of the Roller holder ASSY from “A” of the T1 lift arm. Roller holder ASSY T1 lift arm <Front side> “B” “A” Fig. 3-133 (2) Slide the Roller holder ASSY in the direction of the arrow and remove it from the T1 drive shaft gear Z17M07.
Page 238 Assembling Note: Align the Hole of the Paper feed unit to the Shaft of the Roller holder ASSY and insert it into the Hole. Paper feed unit Paper feed unit Roller holder ASSY Shaft Hole Fig. 3-135 (4) Move the T1 lift arm in the direction of the arrow 4b as bending it in the direction of the arrow 4a and remove it from the Boss of the Paper feed unit.
Page 239 (5) Remove the PF drive gear 21 and PF drive joint from the Main body. Main body PF drive joint <Left side> PF drive gear 21 Fig. 3-137 (6) Remove the Taptite cup B M3x12 screw from the Paper feed unit. (7) Remove the two Taptite bind B M4x12 screws, then shift the Paper feed unit to the right, and remove it from the Main body.
Page 240 (8) Remove the Registration roller drive joint from the PF registration roller shaft. (9) Remove the Joint pin from the PF registration roller shaft. Joint pin Paper feed unit PF registration roller shaft PF registration roller shaft A view <A view> Registration roller drive joint Joint pin...
Page 241 9.38 Registration Front/Rear Sensor PCB ASSY (1) Release the wiring of the Registration front/rear sensor PCB ASSY. (2) Remove the Taptite bind B M3x10 screw and remove the Registration front/rear sensor PCB holder from the Paper feed unit. Taptite bind B M3x10 Registration front/rear sensor PCB holder Paper feed unit...
Page 242 9.39 T1 Paper Feed Sensor PCB ASSY (1) Release all the wiring from the MP drive frame. (2) Remove the three Taptite bind B M3x10 screws and remove the MP drive frame from the Paper feed unit. MP drive frame Taptite bind B M3x10 Paper feed unit Taptite bind B M3x10...
Page 243 (3) Release the Hook and remove the Separation roller bushing from the T1 drive shaft gear Z17M07. Paper feed unit T1 drive shaft gear Z17M07 Hook Separation roller bushing Fig. 3-144 (4) Remove the Edge actuator spring from the Hook of the Paper feed unit and the Hook of the Edge actuator.
Page 244 (5) Pull out the T1 drive shaft gear Z17M07 from the Paper feed unit and remove the Edge actuator. Edge actuator T1 drive shaft gear Z17M07 Paper feed unit Fig. 3-146 (6) Release the wiring of the T1 paper feed sensor PCB ASSY. (7) Release the three Hooks and remove the T1 paper feed sensor PCB ASSY from the Paper feed unit.
Page 245 9.40 High-voltage Power Supply PCB ASSY (1) Remove the four Spacers from the Main frame R ASSY. High-voltage power supply PCB ASSY Main frame R ASSY Spacer Spacer <Right side> Fig. 3-148 (2) Disconnect the two Connectors (CN6 and CN7) from the High-voltage power supply PCB ASSY.
Page 246 (3) Remove the two Taptite pan B M3x10 screws from the High-voltage power supply PCB ASSY. Release the eight Hooks and remove the High-voltage power supply PCB ASSY from the Main body. Hook Hook Taptite pan B M3x10 Main body Hook High-voltage power supply PCB ASSY A view...
Page 247 (4) Release the Hook and remove the HVPS shield ASSY from the High-voltage power supply PCB ASSY. High-voltage power supply PCB ASSY Hook HVPS shield ASSY Fig. 3-151 Assembling Note: After assembling the High-voltage power supply PCB ASSY, check that the Electrode inside the machine does not fall and that you do not feel that the Electrode gets caught when you press it.
Page 248 9.41 Air Duct Film (1) Remove the Air duct film from the Main frame R ASSY by peeling off the Double-sided adhesive tape. Note: - As the Air duct protector tends to come off, be careful not to lose it. - When removing the Air duct film, replace the Air duct film with a new one.
Page 249 9.42 Blower (1) Release the wiring of the Blower. (2) Remove the Blower from the Main frame R ASSY. Main frame R ASSY Label <Right side> Blower Fig. 3-154 Assembling Note: When assembling the Blower, be sure to assemble it in a way that the label side faces out.
Page 250 10. DISASSEMBLY PROCEDURE (LT-320CL/LT-325CL) 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. 3-155 3-113 Confidential...
Page 251 10.2 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 <Back side> Fig. 3-156 (2) Release the two Pins and remove the T2 cover rear from the Main body. T2 cover rear <Back side>...
Page 252 10.3 T2 Cover Left (1) Remove the two Taptite cup S M3x6 SR screws from the T2 cover left. T2 cover left <Front side> Taptite cup S M3x6 SR Taptite cup S M3x6 SR Fig. 3-158 (2) Release the one Pin and release the two Hooks at the top. (3) Release the two Hooks at the bottom and remove the T2 cover left from the T2 frame L unit.
Page 253 10.4 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 <Right side> Taptite cup S M3x6 SR Fig. 3-160 (2) Release the one Pin and release the two Hooks at the top. (3) Release the three Hooks at the bottom and remove the T2 cover right from the Main body.
Page 254 10.5 T2 Relay PCB ASSY (1) Disconnect all the 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. 3-162 (2) Remove the Taptite cup S M3x6 SR screw and remove the T2 relay PCB ASSY from the T2 frame L unit.
Page 255 10.6 T2 Paper Feed Frame Unit/T2 Edge Actuator (1) Remove the Clutch spring from the Clutch arm ASSY. Clutch arm ASSY Clutch spring <Left side> Clutch arm ASSY Fig. 3-164 (2) Release the Hook and remove the Gear 45/40 from the T2 frame L unit. Gear 45/40 T2 frame L unit <Left side>...
Page 256 (3) Remove the Collar 6 from the Clutch arm ASSY. Collar 6 Clutch arm ASSY <Left side> Fig. 3-166 (4) Remove the Clutch arm ASSY from the T2 frame L unit. T2 frame L unit Clutch arm ASSY <Left side> Fig.
Page 257 (5) Remove the five Taptite cup S M3x6 SR screws and remove the T2 beam F ASSY from the Main body. Taptite cup S M3x6 SR Taptite cup S M3x6 SR Taptite cup S M3x6 SR T2 beam F ASSY <Front side>...
Page 258 (7) Remove the Retaining ring E3 from the Feed roller and remove the Feed roller bushing TR. Feed roller Feed roller bushing TR Retaining ring E3 <Right side> Fig. 3-170 (8) Remove the Lift spring from the Hook of the Lift lever A. (9) Remove the Feed roller from the Main body in the directions of the arrows 9a, 9b, and 9c in this order.
Page 259 Assembling Note: When assembling the Feed 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 comes in front of “B”. Lift lever B “B”...
Page 260 (11) Release the Hook and remove the Gear 33 from the T2 frame L unit. Gear 33 T2 frame L unit <Left side> Hook Fig. 3-174 (12) Remove the Extension spring from the Spring hook. (13) Release the Hook and remove the Gear 46/55 from the T2 frame L unit. T2 frame L unit Hook <Left side>...
Page 261 (14) Remove the Taptite cup S M3x6 SR screw and remove the T2 solenoid holder ASSY from the T2 frame L unit. (15) Remove the Gear 46 from the T2 frame L unit. T2 frame L unit Gear 46 T2 solenoid holder ASSY Taptite cup S M3x6 SR <Left side>...
Page 262 (18) Turn the T2 frame L unit right side up. (19) Remove the two Taptite cup S M3x6 SR screws from the T2 beam rear. T2 beam rear Taptite cup S M3x6 SR <Back side> Fig. 3-178 (20) Remove the two Taptite cup S M3x6 SR screws from the T2 beam rear. T2 beam rear Taptite cup S M3x6 SR <Left side>...
Page 263 (21) Remove the Taptite bind B M4x10 screw and Bush from the T2 frame L unit. T2 frame L unit Taptite bind B M4x10 Bush <Left side> Fig. 3-180 (22) Remove the T2 paper feed frame unit from the Main body in the order of the arrow 22a and arrow 22b.
Page 264 (23) Release the Hook and slide the T2 separation roller ASSY in the direction of the arrow. (24) Rotate the T2 separation roller ASSY in the direction of the arrow 24a. Remove the T2 separation roller ASSY from the T2 paper feed drive shaft in the direction of the arrow 24b. T2 paper feed frame unit T2 paper feed frame unit T2 paper feed drive shaft...
Page 265 (25) Release the Hook and remove the T2 paper pick-up roller ASSY from the T2 paper feed drive shaft. T2 paper feed frame unit Hook T2 paper feed drive shaft T2 paper pick-up roller ASSY Fig. 3-184 (26) Remove the “A” of the T2 edge actuator spring from the Hook of the T2 paper feed frame unit.
Page 266 (27) Remove the T2 paper feed spring from the Hook of the T2 paper feed frame unit and the Hook of the T2 paper feed holder ASSY. T2 paper feed spring Hook T2 paper feed holder ASSY T2 paper feed frame unit Hook of the T2 paper feed holder ASSY Fig.
Page 267 (29) Slide the T2 paper feed drive shaft in the direction of the arrow 29a and remove the T2 paper feed holder bushing from the T2 paper feed holder ASSY. T2 paper feed holder ASSY T2 paper feed drive shaft T2 paper feed holder bushing Fig.
Page 268 (31) Pull out the T2 paper feed drive shaft from the T2 paper feed holder ASSY and T2 edge actuator. (32) Remove the T2 edge actuator from the T2 paper feed holder ASSY. T2 paper feed holder ASSY T2 edge actuator T2 paper feed drive shaft Fig.
Page 269 CHAPTER 4 ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT IF YOU REPLACE THE MAIN PCB ASSY ■ What to do after replacement - Installing the Firmware (Sub firmware, Panel firmware, Main Firmware, and High-voltage firmware) - Initializing the EEPROM of the Main PCB ASSY (Function code 01) - Restore Machine Information (Function code 41) - Setting by Country (Function code 74) - Setting the Serial Number (Function code 80)
Page 270 Installing the Firmware (Sub Firmware, Panel Firmware, Main Firmware, and High-voltage Firmware) 1.1.1 Checking firmware version Check whether the firmware installed in the machine is the latest version. If the version is the latest, updating the firmware is unnecessary. If the version is not the latest, install the latest firmware into the machine following the instructions provided in “1.1.2 Installing the firmware”...
Page 271 1.1.2 Installing the firmware ■ Installing the firmware using USB flash memory Memo: - Installing the firmware using a USB flash memory is not possible in deep sleep mode. Open and close the front cover, etc. to quit the deep sleep mode before installing the firmware.
Page 272 Chapter (2) Connect the computer to the machine with the USB cable. (3) Open the temporary folder, double-click the “Filedg32.exe” to start, and select “Brother Maintenance USB Printer”. (4) Drag and drop a necessary program file (for instance, LZXXXX_$.djf) located in the same folder to the Brother Maintenance USB Printer icon located within the FILEDG32 screen.
Page 273 (4) Select “3 Color-Laser” in [Product Category] field. (5) Select “2014_Printer”. (6) In [Port] field on the BrUsbSn screen, select the port assigned to Brother Maintenance USB Printer. (7) Enter the serial number (15 digits) of the machine into the box on the [Serial No] field.
Page 274 IF YOU REPLACE THE REGISTRATION MARK SENSOR UNIT ■ What to do after replacement - Continuous Adjustments of Density and Registration Sensor (Function code 73) Continuous Adjustments of Density and Registration Sensor (Function code 73) Perform continuous adjustments of density and registration sensor in accordance with “1.3.22 Continuous adjustments of density and registration sensor (Function code 73)”...
Page 275 IF YOU REPLACE THE LOW-VOLTAGE POWER SUPPLY PCB UNIT ■ What to do after replacement - Reset of Irregular Power Supply Detection Counter of Low-Voltage Power Supply PCB (Reset Counters for Parts (Function code 88)) Reset of Irregular Power Supply Detection Counter of Low-Voltage Power Supply PCB (Reset Counters for Parts (Function code 88)) Perform resetting irregular power supply detection counter of the low-voltage power supply...
Page 276 IF YOU REPLACE THE PROCESS DRIVE UNIT ■ What to do after replacement - Motor Reset (Function code 57) Motor Reset (Function code 57) Perform motor reset in accordance with “1.3.13 Motor reset (Function code 57)” in Chapter Confidential...
Page 277 IF YOU REPLACE THE HIGH-VOLTAGE POWER SUPPLY PCB ASSY ■ What to do after replacement - Installing the Firmware (Sub firmware, Panel firmware, Main Firmware, and High-voltage firmware) - Continuous Adjustments of Density and Registration Sensor (Function code 73) ■ What you need to prepare (1) USB flash memory (2) A USB cable...
Page 278 Installing the Firmware (Sub Firmware, Panel Firmware, Main Firmware, and High-voltage Firmware) 5.1.1 Checking firmware version Check whether the firmware installed on the machine is the latest version in accordance with “1.1.1 Checking firmware version” in this chapter. If the version is the latest, installing the firmware is unnecessary.
Page 279 IF YOU REPLACE THE TOP COVER ASSY, LCD PANEL ASSY OR PANEL CONTROL PCB ASSY (MODEL WITH TOUCH PANEL ONLY) ■ What to do after replacement - Installing the Firmware - Adjustment of Touch Panel (Function code 61) - Operational Check of LCD (Function code 12) ■...
Page 280 Adjustment of Touch Panel (Function code 61) Perform adjustment of touch panel in accordance with “1.3.14 Adjustment of touch panel (Function code 61) (Model with touch panel only)” in Chapter Operational Check of LCD (Function code 12) Perform operation check of the LCD in accordance with “1.3.4 Operational check of LCD (Function code 12)”...
Page 281 IF YOU REPLACE THE TOP COVER ASSY, PANEL COVER ASSY, PANEL PCB ASSY, (MODEL WITHOUT TOUCH PANEL ONLY) ■ What to do after replacement - Operational Check of LCD (Function code 12) - Operational Check of Control Panel Key (Function code 13) Operational Check of LCD (Function code 12) Perform operation check of the LCD in accordance with “1.3.4 Operational check of LCD...
Page 282 IF YOU REPLACE THE LASER UNIT ■ What to do after replacement - Continuous Adjustments of Density and Registration Sensor (Function code 73) - Counter Reset of Laser Unit (Reset Counters for Parts (Function code 88)) Continuous Adjustments of Density and Registration Sensor (Function code 73) Perform continuous adjustments of density and registration sensor in accordance with “1.3.22...
Page 283 IF YOU REPLACE THE FUSER UNIT/ PF KIT 1, 2, AND MP ■ What to do after replacement - Counter Reset of Fuser Unit or PF Kit 1, 2, and MP (Reset Counters for Parts (Function code 88)) Counter Reset of Fuser Unit or PF Kit 1, 2, and MP (Reset Counters for Parts (Function code 88)) Perform counter reset of the fuser unit or PF kit 1, 2, and MP in accordance with “1.3.29 Reset...
Page 284 CHAPTER 5 SERVICE FUNCTIONS MAINTENANCE MODE The maintenance mode is exclusively designed for the checking, setting and adjustments of the machine by using the keys on the control panel. You can check the operations of sensors, perform a print test, display the log information or error codes, and modify the worker switch (WSW). How to Enter the Maintenance Mode 1.1.1 How to Enter the Maintenance Mode Exclusive to Service Personnel...
Page 285 1.1.2 How to Enter the End User-accessible Maintenance Mode Basically, the maintenance-mode functions listed in the next page should be accessed by service personnel only. However, you can allow end users to access some of these under the guidance of service personnel by phone, for example. The end user-accessible functions are shaded in the table given on “1.2 List of Maintenance-mode Functions”.
Page 286 List of Maintenance-mode Functions Function Function Refer to: code EEPROM parameter initialization 1.3.1 (5-4) Monochrome image quality test pattern 1.3.2 (5-5) Worker switch (WSW) setting 1.3.3 (5-6) Printout of worker switch (WSW) data 1.3.3 (5-6) Operational check of LCD 1.3.4 (5-8) Operational check of control panel key 1.3.5 (5-10) Software version check...
Page 287 Detailed Description of Maintenance-mode Functions 1.3.1 EEPROM parameter initialization (Function code 01, 91) <Function> This function is used to initialize the setting values for operation parameters, user switches, and worker switches (WSW) registered in the EEPROM. Entering function code 01 initializes most EEPROM areas.
Page 288 1.3.2 Monochrome image quality test pattern (Function code 09) <Function> This function is used to print various monochrome test patterns and check the quality and if there is any image loss. <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 0 and 9 keys in this order in...
Page 289 1.3.3 Worker switch (WSW) setting and printout (Function code 10, 11) [1] Worker switch (WSW) setting (Function code 10) <Function> The worker switches shown in the table below can be used to set the function to satisfy various requirements. The switch setting can be changed using the keys on the control panel. The worker switches are factory set to conform with the laws and regulations of the country the machine is shipped to.
Page 290 (4) Press the OK key. The following is (3) Move the cursor to the selector you displayed on the LCD. want to change with the key, and change the value by pressing the 1 Selector 1 Selector 8 or 0 key. (4) When you finish changing the value, press the SET key.
Page 291 1.3.4 Operational check of LCD (Function code 12) <Function> This function is used to check that the LCD on the control panel is operating normally. <Operating procedure> Model without touch panel (1) Press the key to display “MAINTENANCE 12” on the LCD in the initial state of the maintenance mode.
Page 292 Model with touch panel <Operating procedure> (1) Press the 1 and 2 keys in this order in the initial state of the maintenance mode. A completely blank screen is displayed on the LCD. (2) Each time you press the key, the LCD cycles through the displays as shown below. (3) When the X key is pressed, the machine returns to the initial state of the maintenance mode, regardless of the display status.
Page 293 X key. mode during the above procedure, press the Cancel key. ■ Order to press keys - HL-L8250CDN/L8350CDW - HL-L9200CDW Fig. 5-5 5-10 Confidential...
Page 294 1.3.6 Software version check (Function code 25) <Function> This function is used to check the version information of the firmware or programs, or check sum information. <Operating procedure> Model without touch panel Model with touch panel (1) Press the 2 and 5 keys in this order in (1) Press the key to display “MAINTENANCE 25”...
Page 295 1.3.7 “One Push Demo” setting (Function code 28) <Function> The One Push Demo function is to implement demo printing by pressing a specified key, which is mainly used for sales promotion at the shop. This function is disabled once printing is performed from the computer.
Page 296 1.3.8 Operational check of sensors (Function code 32) <Function> This function is used to check that the sensors are operating normally. <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 3 and 2 keys in this order in “MAINTENANCE 32”...
Page 297 Sensor names Detection status (displayed/not displayed) ° MAC XXC Internal temperature sensor C/NG ° BT XXC Belt temperature sensor C (The value will not be changed since this sensor is not installed.) ° TMP XXC External temperature sensor C/NG HUM XXC External humidity sensor XX %/NG Note:...
Page 298 Toner/new sensor PCB ASSY MP paper empty sensor Develop release sensor PCB ASSY MP registration front sensor New toner sensor (Black) Toner sensor (Black) New toner sensor (Cyan) MP upper cover Toner sensor (Cyan) ASSY New toner sensor (Magenta) Toner sensor (Magenta) Waste toner sensor New toner sensor (Yellow) Toner sensor (Yellow)
Page 299 1.3.9 LAN connection status display (Function code 33) <Function> This function is used to check the connection status of the wired LAN. <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 3 key twice in the initial state “MAINTENANCE 33”...
Page 300 1.3.10 EEPROM Dump Print (Function code 40) <Function> This function is to print the EEPROM information. <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 4 and 0 keys in this order in “MAINTENANCE 40”...
Page 301 Backup Procedure Model without touch panel Model with touch panel (1) On the computer, create a “BROTHER” (1) On the computer, create a “BROTHER” folder in an USB flash memory to be folder in an USB flash memory to be used for saving backup data.
Page 302 The USB flash memory is being used by another operation. Insert USB Mem No USB flash memory is inserted. No file The file name is invalid or no “BROTHER” folder exists. USB Mem Error USB flash memory error Write Error The USB flash memory does not have enough space.
Page 303 The USB flash memory is being used by another operation. Insert USB Mem No USB flash memory is inserted. No file The file name is invalid or no “BROTHER” folder exists. There is no backup data. USB Mem Error USB flash memory error Machine ID Error Serial number does not match.
Page 304 1.3.12 Changing return value of USB No./Switching Dither Pattern/ Switching of ON/OFF of DirectPrint Color mode-Improve Gray Color/ Switching of timing to execute Auto Registration/ Adjusting left-end print start position on second side in duplex printing/ Change of the transfer current setting/Change of ghost reduction setting (Function code 45) ■...
Page 305 ■ 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 306 ■ Switching of ON/OFF of DirectPrint Color mode-Improve Gray Color <Function> This function is to switch ON/OFF of the print control for the gray color when other colors are slightly blended in the gray color or the gray color is uneven upon printing. Description DP.ImpGray=ON DirectPrint Color mode - Improve Gray Color.
Page 307 ■ 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 function is to switch the threshold value which is used as the timing to execute Auto Registration.
Page 308 ■ Adjusting left-end print start position on second side in duplex printing <Function> This function is to adjust the left-end print start position on the second side in the left and right direction if it is displaced in duplex printing. The adjustable range is -100 to 750 (unit: 300 dpi) (The minus direction means the left direction.) <Operating procedure>...
Page 309 ■ Change of the transfer current setting (Only for Japanese hagaki printing) <Function> Dots appeared when hagaki printing is performed can be alleviated by changing the transfer current setting. <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 4 and 5 keys in this order in “MAINTENANCE 45”...
Page 310 ■ Change of ghost reduction setting <Function> This function is a mode to reduce the level of ghost when it appears in low temperature and high humidity environment. If this function is turned ON, however, spots and dirt may appear on print.
Page 311 1.3.13 Motor reset (Function code 57) <Function> When the main PCB or each motor is replaced, the main PCB needs to identify each motor. If you reset the identification of each motor in the main PCB with this function, when the power is turned ON next time, a motor identification operation for each motor is performed before the engine performs a warm-up.
Page 312 This adjustment requires a touch panel stylus with a thin tip. A commercially available stylus designed for electronic dictionaries or personal digital assistance (PDA) can be used. If you do not have it on hand, order the “TOUCH PEN” from the Brother's parts list. <Operating procedure>...
Page 313 1.3.15 Adjustment of color registration (Adjustment of inter-color position alignment) (Function code 66) <Function> This function allows service personnel to forcibly activate the adjustment of color registration (adjustment of inter-color position alignment) function which is usually executed automatically under 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 314 ■ Adjustment of inter-color position alignment without registration sensor calibration (auto) <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 6 key twice in the initial state of the maintenance mode. “MAINTENANCE 66”...
Page 315 ■ Printing of misregistration correction chart <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 6 key twice in the initial state “MAINTENANCE 66” on the LCD in the of the maintenance mode. initial state of the maintenance mode.
Page 316 ■ Adjustment of inter-color position alignment (manual) <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 6 key twice in the initial state “MAINTENANCE 66” on the LCD in the of the maintenance mode.
Page 317 1.3.16 Continuous print test (Function code 67) <Function> This function is used to conduct paper feed and eject tests while printing patterns. <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 6 and 7 keys in this order in “MAINTENANCE 67”...
Page 318 <Print pattern> Description SELECT: K 100% Black 100% solid print SELECT: C 100% Cyan 100% solid print SELECT: M 100% Magenta 100% solid print SELECT: Y 100% Yellow 100% solid print SELECT: W 100% White 100% solid print SELECT: R 100% Red 100% solid print SELECT: G 100% Green 100% solid print...
Page 319 <Print type> Description SELECT: TRAY1 SX One-sided printing from Paper tray 1 SELECT:TRAY2 SX One-sided printing from T2 paper tray unit SELECT: MP SX One-sided printing from MP tray SELECT: TRAY1 DX Two-sided printing from Paper tray 1 SELECT:TRAY2 DX Two-sided printing from T2 paper tray unit SELECT: MP DX Two-sided printing from MP tray...
Page 320 ■ Print pattern SELECT: K 100% SELECT: C 100% SELECT: M 100% SELECT: Y 100% SELECT: W 100% SELECT: R 100% SELECT: G 100% SELECT: B 100% SELECT: KCMY1% SELECT: KCMY5% SELECT: Lattice SELECT: Total (When Print type is DX) SELECT: Total (When Print type is SX) Fig.
Page 321 1.3.17 Laser unit test pattern print (Function code 68) <Function> This function is used to print the laser unit test patterns and check if there is any failure in the laser unit. <Operating procedure> Model without touch panel Model with touch panel (1) Press the 6 and 8 keys in this order in (1) Press the key to display...
Page 322 1.3.18 Frame pattern print (One-sided) (Function code 69) <Function> This function is used 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> Model without touch panel Model with touch panel (1) Load the paper whose size matches the...
Page 323 1.3.19 Frame pattern print (Two-sided) (Function code 70) <Function> This function is used 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> Model without touch panel Model with touch panel (1) Load the paper whose size matches the...
Page 324 1.3.20 Color test pattern (Function code 71) <Function> This function is used to print the pattern of each color and check if there is any dirty on or failure in the belt unit, developer roller, and exposure drum, etc. <Operating procedure> Model without touch panel Model with touch panel (1) Press the...
Page 325 <Print pattern> Description 2D3S YMCBWKW_A Total seven sheets of one sheet for each color with full page print mode* + two blank sheets + data to check Banding 2D3S M Magenta 2D3S K Black 2D3S C Cyan 2D3S Y Yellow 2D3S MCYK 4-color horizontal band * In the full page print mode, the cleaning operation is performed between printing of blank...
Page 326 <Number of pages to be printed> Description SELECT: 1PAGE One page printing SELECT: CONTINUE Continuous printing <Error message> Description Replace Toner Replace the empty toner cartridge and press the Go key for the model without a touch panel and the Mono key for the model with a touch panel to clear the error.
Page 327 1.3.21 Sensitivity adjustment of density sensor (Function code 72) <Function> This function is used 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 for correcting developing bias voltage is adjusted.
Page 328 1.3.22 Continuous adjustments of density and registration sensor (Function code 73) <Function> This function is used to perform the following functions consecutively: Sensitivity adjustment of density sensor (Function code 72), Developing bias voltage correction (Function code 83), and Adjustment of color registration (Adjustment of inter-color position alignment) including registration sensor calibration (Function code 66).
Page 329 1.3.23 Setting by country (Function code 74) <Function> This function is used to customize the machine according to language, function settings, and worker switch settings. <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 7 and 4 keys in this order in “MAINTENANCE 74”...
Page 330 0104 Singapore 0106 Switzerland 0104 Turkey 0141 Taiwan 0123 U.S.A 0101 United Kingdom 0104 Note: The above information is as of January 2014. Please confirm the latest firmware information which is available from your local Brother Customer Service. 5-47 Confidential...
Page 331 1.3.24 Printout of maintenance information (Function code 77) <Function> This function is used to print the maintenance information, such as the remaining amount of consumables, number of replacements, and counter values. <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 7 key twice in the initial state...
Page 332 Model name Remaining life of belt unit Serial number Remaining life of fuser unit Model code Remaining life of laser unitt Spec code Total printed page Switch checksum (factory use) Total number of color pages printed/ Total number of monochrome pages printed Main firmware version Sub firmware version Accumulated average coverage...
Page 333 1.3.25 Operational check of fans (Function code 78) <Function> This function is used to check that each fan is operating normally. The rotation speed is changed among three settings: 100%, 50% and OFF. Parts name Description Fuser fan Evacuate hot air of the fuser unit. Power fan Evacuate hot air of the low-voltage power supply PCB unit.
Page 334 1.3.26 Display of device log information (Function code 80) <Function> This function is used to display the log information on the LCD. <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 8 and 0 keys in this order in “MAINTENANCE 80”...
Page 335 Description CCVRGACC:3.47% Accumulated average coverage of cyan toner cartridge MCVRGUSI:4.32% Average coverage of magenta toner cartridge in use MCVRGACC:3.47% Accumulated average coverage of magenta toner cartridge YCVRGUSI:4.32% Average coverage of yellow toner cartridge in use YCVRGACC:3.47% Accumulated average coverage of yellow toner cartridge KCVRGUSI:4.32% Average coverage of black toner cartridge in use KCVRGACC:3.47%...
Page 336 Description YTN_CH:0000 Number of times that the yellow toner cartridge has been replaced KTN_CH:0000 Number of times that the black toner cartridge has been replaced DRUM_CH:0000 Number of times that the drum unit has been replaced WTNR_CH:0000 Number of times that the waste toner box has been replaced BELT_CH:0000 Number of times that the belt unit has been replaced FUSR_CH:0000...
Page 337 The serial number can be changed according to the steps below. Model without touch panel Model with touch panel 1) Press the key while the 1) Press the 9, 4, 7, and 5 keys in this serial number is displayed on the order while the serial number is LCD to display “9”...
Page 338 1.3.27 Display of device error codes (Function code 82) <Function> This function is used to display the latest error code on the LCD. <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display (1) Press the 8 and 2 keys in this order in “MAINTENANCE 82”...
Page 339 1.3.28 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 “1.3.21 Sensitivity adjustment of density sensor (Function code 72)”...
Page 340 1.3.29 Reset counters for parts (Function code 88) <Function> After replacing a fuser unit, PF kit 1, 2, MP, laser unit, or low-voltage power supply PCB unit, perform this function to increase the replacement count by one and reset the count to clear the “Replace ***”...
Page 341 OTHER SERVICE FUNCTIONS Toner Manual Reset Function <Function> This function is to manually perform the same operation 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 cartridge cannot be recognized by the machine, and the toner life display fails to be cleared.
Page 342 Drum Cleaning <Function> This function is to attach a special cleaning sheet on the drum unit and perform the cleaning of the drum. <Operating procedure> Model without touch panel Model with touch panel (1) Press the Cancel key and key at (1) Press the Settings key in the ready the same time in the ready state.
Page 343 Counter Reset of Consumable Parts (Drum Unit/Belt Unit) <Function> After replacing a drum unit or belt unit, perform this function to increase the replacement count by one and reset the count to clear the “Replace ***” warning. <Operating procedure> Model without touch panel Model with touch panel (1) Press GO and ▲...
Page 344 CHAPTER 6 WIRING DIAGRAM WIRING DIAGRAM MODEL WITH TOUCH PANEL CN18 PANEL RELAY PCB ASSY MAIN PCB ASSY PANEL CONTROL CN17 22 HU+ FG 1 TOUCH_AD1 1 LED+ 1 21 HU- PCB ASSY +24V 2 TOUCH_AD0 2 LED- 2 20 HV+ PW_SW 3 GND 3 RD 3...
Page 345 CHAPTER 7 PERIODICAL MAINTENANCE SAFETY PRECAUTIONS To avoid creating secondary problems by mishandling, follow the warnings and precautions below during maintenance work. WARNING Some parts inside the machine are extremely hot immediately after the machine is used. When opening the front cover or back cover to access any parts inside the machine, never touch the shaded parts shown in the following figures.
Page 346 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, and - the LAN cable, if connected. (2) Remove the Paper tray. Main body Paper tray Confidential...
Page 347 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/R from the Main body. Main body Back cover stopper arm L Back cover stopper arm L Back cover stopper arm R Back cover <Back side>...
Page 348 (3) Remove the Shaft of the Back cover from the Bush on the right side of the Main body. Main body Shaft Bush Back cover <Back side> Fig. 7-3 (4) Remove the Back cover. Main body <Back side> Back cover Fig.
Page 349 (5) Open the Back flapper holder. Release the two Pins and remove the Back flapper holder from the Main body. Main body <Back side> Back flapper holder Fig. 7-5 (6) Remove the two Taptite bind B M4x12 screws from the Fuser cover L. (7) Remove the one Hook and one Pin and remove the Fuser cover L from the Main body.
Page 350 (8) Release the lock of the Fuser cover lock lever L/R to open the Fuser cover ASSY. Main body Fuser cover lock lever L Fuser cover ASSY <Back side> Fuser cover lock lever R Fig. 7-7 (9) Slide the Fuser cover ASSY in the direction of the arrow 9a and remove it to the front. Main body Fuser cover ASSY <Back side>...
Page 351 (10) Remove the Cleaner roller spring from the Hook of the Fuser cover ASSY. Hook Fuser cover ASSY Cleaner roller spring Cleaner pinch roller S ASSY Fig. 7-9 (11) Remove the Cleaner roller spring from the two Pins of the Fuser cover ASSY. Remove the Cleaner pinch roller S ASSY and Cleaner roller spring from the Fuser cover ASSY.
Page 352 (12) Remove the Cleaner pinch roller S ASSY from the Cleaner roller spring. Cleaner roller spring Cleaner pinch roller S ASSY Fig. 7-11 (13) Remove the other three Cleaner pinch roller S ASSYs in the same way. (14) Remove the two Taptite bind B M4x12 screws from the Fuser cover R. (15) Release the two Hooks and remove the Fuser cover R from the Main body.
Page 353 (16) Disconnect the two Connectors (CN1 and CN2) from the Eject sensor PCB ASSY. Connector (Center thermistor harness Connector Eject sensor PCB ASSY <Back side> Fig. 7-13 Assembling Note: * Center thermistor has a black and blue connectors (230V models only). The black connector may be connected to the blue insertion port and vice versa.
Page 354 (18) 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 Taptite pan B M4x14 <Back side> Fig. 7-15 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.
Page 355 (19) Release the five Hooks and remove the Toner filter ASSY from the Paper eject ASSY. Paper eject ASSY Paper eject ASSY Hook Hook Toner filter ASSY Hook Fig. 7-17 (20) After replacing the Fuser unit, reset the counter. (Refer to “1.3.29 Reset counters for parts (Function code 88)”...
Page 356 2.1.2 Laser unit (1) Open the Back cover. Main body Back cover <Back side> Fig. 7-18 (2) Remove the Back cover stopper arm L/R from the Main body. Main body Back cover stopper arm L Back cover stopper arm L Back cover stopper arm R Back cover <Back side>...
Page 357 (3) Remove the Shaft of the Back cover from the Bush on the right side of the Main body. Main body Shaft Bush Back cover <Back side> Fig. 7-20 (4) Remove the Back cover. Main body <Back side> Back cover Fig.
Page 358 (5) Open the Front cover. Main body Front cover Fig. 7-22 (6) Remove the one Taptite B 3x6 screw and the one Taptite bind B M4x12 screw from the front of the Side cover L ASSY. (7) Remove the Taptite bind B M4x12 screw from the side of the Side cover L ASSY. Main body Side cover L ASSY Taptite B 3x6...
Page 359 (8) Remove the two Taptite bind B M4x12 screws from the back of the Side cover L ASSY. Side cover L ASSY Taptite bind B M4x12 <Back side> Fig. 7-24 7-15 Confidential...
Page 360 (9) Release the Hooks 1 to 8 in numerical order. Move the Side cover L ASSY in the direction of the arrow 9a and release the Hook 9 and remove the Side cover ASSY from the Main body. Side cover L ASSY Hook8 Hook9 Hook7...
Page 361 (10) Remove the one Taptite B 3x6 screw and the one Taptite bind B M4x12 screw from the front of the Side cover R. Taptite B 3x6 Side cover R <Front side> Taptite bind B M4x12 Fig. 7-27 (11) Remove the two Taptite bind B M4x12 screws from the back of the Side cover R. Taptite bind B M4x12 Side cover R...
Page 362 (12) Release the Hooks 1 to 7 in numerical order. Move the Side cover R in the direction of the arrow 12a and release the Hook 8 and remove the Side cover R from the Main body. Side cover R Hook8 Hook 7 Hook 6...
Page 363 Note: As the Spacer tends to come off, be careful not to lose it. Spacer High-voltage power supply PCB ASSY Spacer Spacer Spacer <Right side> Fig. 7-31 (13) Remove the four Screw bind M3x8 screws and remove the Main shield cover plate ASSY from the Main body.
Page 364 (14) In the case of model without touch panel, disconnect the three Connectors (CN5, CN6 and CN23) from the Main PCB ASSY and release the wiring. In the case of model with touch panel, disconnect the three Connectors (CN5, CN6 and CN18) from the Main PCB ASSY and release the wiring.
Page 365 (16) Remove the two Taptite bind B M4x12 screws from the back of the Top cover ASSY. Top cover ASSY Taptite bind B M4x12 <Back side> Fig. 7-35 7-21 Confidential...
Page 366 (17) Release the three Hooks 1 and two Bosses. Release the other six Hooks and remove the Top cover ASSY from the Main body. Hook Top cover ASSY Boss Hook Hook 1 Boss Main body Hook Main body Fig. 7-36 7-22 Confidential...
Page 367 (18) Remove the six Taptite bind B M4x12 screws and four Taptite cup S M3x6 SR screws, and remove the Scanner cover plate from the Main body. Assembling Note: When assembling the six screws of the Taptite bind B M4x12, be sure to assemble them in the order shown in the figure.
Page 368 (20) Remove the five Taptite cup S M3x6 SR screws and remove the four Scanner holders from the Scanner plate. Taptite cup S M3x6 SR Taptite cup S M3x6 SR Scanner holder Taptite cup S M3x6 SR Taptite cup S M3x6 SR Scanner holder Scanner holder Scanner plate...
Page 369 (21) Disconnect the Connector (CN8). (22) Remove the Laser unit from the Scanner plate. Laser unit Scanner plate <Front side> Fig. 7-41 (23) After replacing the Laser unit, reset the counter. (Refer to “1.3.29 Reset counters for parts (Function code 88)” in Chapter 7-25 Confidential...
Page 370 2.1.3 PF kit 1 (1) Release the Hook and remove the Separation pad holder ASSY from the Paper tray 1. Separation pad holder ASSY “A” Paper tray 1 “B” Separation pad spring Hook Fig. 7-42 Assembling Note: When assembling the Separation pad holder ASSY, be sure to assemble it in a way that “A” of the Separation pad holder ASSY is inserted into “B”...
Page 371 (2) Remove the Separation pad spring from the Paper tray 1. Separation pad spring Paper tray 1 Fig. 7-43 (3) Push the T1 lift arm to the back and remove “B” of the Roller holder ASSY from “A” of the T1 lift arm.
Page 372 (4) Slide the Roller holder ASSY in the direction of the arrow and remove it from the T1 drive shaft gear Z17M07. (5) Slide the Roller holder ASSY in the direction of the arrow 5a and 5b in this order and remove it from the Paper feed unit.
Page 373 2.1.4 PF kit 2 (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 374 (3) Release the Hook and slide the T2 separation roller ASSY in the direction of the arrow. (4) Rotate the T2 separation roller ASSY in the direction of the arrow 4a. Remove the T2 separation roller ASSY from the T2 paper feed drive shaft in the direction of the arrow 4b. T2 separation roller ASSY T2 separation roller ASSY Hook...
Page 375 (5) Release the Hook and remove the T2 paper pick-up roller ASSY from the T2 paper feed drive shaft. T2 paper feed frame unit T2 paper pick-up roller ASSY Hook T2 paper feed drive shaft Fig. 7-51 (6) After replacing the PF kit 2, reset the counter. (Refer to “1.3.29 Reset counters for parts (Function code 88)”...
Page 376 2.1.5 PF kit MP (1) Press “A” to release the Hook and remove the MP upper frame cover from the MP upper cover ASSY. “A” MP upper frame cover Hook MP upper cover ASSY Fig. 7-52 (2) Remove the MP lift arm B from the MP upper cover ASSY. MP lift arm B MP upper cover ASSY Fig.
Page 377 (3) Release the Hook 1 and rotate the MP holder bushing in the direction of the arrow. (4) Release the Hook 2 and remove the MP holder bushing from the MP upper cover ASSY. Hook 1 Hook 2 MP holder bushing Hook 1 Hook 2 <Front side>...
Page 378 (6) Turn the MP separation pad ASSY upright to remove it from the MP upper cover ASSY. MP separation pad ASSY MP upper cover ASSY MP separation pad ASSY Fig. 7-56 (7) Remove the MP separation pad spring from the two Pins of MP upper cover ASSY. MP separation pad spring MP upper cover ASSY Fig.
Page 379 APPENDIX 1 SERIAL NUMBERING SYSTEM ■ Serial number labels for the printer itself Serial number A 4 J 1 1 1 1 0 1 Model number Serial number (6-digit) Manufacturing factory No. Year of manufacture 4: 2014 5: 2015 Month of manufacture A: January E: May J: September...
Page 380 APPENDIX 2 DELETION OF USER SETTING INFORMATION In this machine, the user setting information is stored in the main PCB. The following procedure allows the factory default settings to be restored in the machine. <Operating procedure> Model without touch panel Model with touch panel (1) Press the key to display...
Page 381 Maintenance USB Printer driver has been already installed to your computer according to this procedure, skip this section. - Before proceeding to the procedure given below, make sure that the Brother Maintenance USB Printer driver is stored in your computer.
Page 382 (7) Select “Install the software automatically (Recommended)” and click [Next]. (8) Alert warning message of WHQL appears. Click [Continue Anyway] to proceed. App.3-2 Confidential...
Page 383 (9) Repeat steps (6) to (8) three times. Installation is completed. (10) If the Brother Maintenance USB Printer driver is successfully installed, the following message screen appears. Click [Finish] to return. App.3-3 Confidential...
Page 384 Note: In order to check whether the printer driver is successfully installed, click [Start], [Settings], [Printers] to select the Printers window. Then, check that the Brother Maintenance USB Printer icon is shown. App.3-4 Confidential...
Page 385 Disconnect the USB cable that connects the machine with your computer. (2) Turn ON your computer. (3) Double-click Setup.exe inside the Brother Maintenance USB Printer folder that was saved in a temporary folder. The following screen appears. Click the [Next] button.
Page 386 (4) Wait for the following screen to appear and click [Finish]. (5) Plug the power cord of the machine into an electrical outlet. (6) Enter the maintenance mode. (Refer to “1.1 How to Enter the Maintenance Mode” in Chapter (7) Connect the machine to your computer using a USB cable and the installation will be performed automatically.

This manual is also suitable for:

L8350cdw L8350cdwt L9200cdw L9200cdwt

Brother HL-L8250CDN Service Manual

Regulation

Safety Information

Chapter 1 Supplemental Specifications

Chapter 2 Error Indication and Troubleshooting

Introduction

Overview

Error Indications

Troubleshooting

Quick Links

Troubleshooting

Summary of Contents for Brother HL-L8250CDN

Page 4: Table Of Contents

Page 11: Regulation

Page 16: Safety Information

Page 21: Chapter 1 Supplemental Specifications

Page 22: Network Connectivity

Page 23: Supplies

Page 24: Chapter 2 Error Indication And Troubleshooting

Page 26: Checks Before Commencing Troubleshooting

Page 28: Overview

Page 29: Paper Feeding

Page 30: Operation Of Each Part

Page 31: Block Diagram

Page 32: Main Components

Page 33: Error Indications

Page 43: Error Message

Page 62: Troubleshooting

Page 102: Troubleshooting For Paper Feeding Problems

Page 103: No Paper Feeding From T2 Paper Tray Unit

Page 104: No Paper Feeding From Mp Tray

Page 105: Multiple Sheets Of Paper Are Fed

Page 106: Paper Curls

This manual is also suitable for:

Brother HL-L8250CDN Service Manual

Regulation

Safety Information

Chapter 1 Supplemental Specifications

Chapter 2 Error Indication and Troubleshooting

Introduction

Overview

Error Indications

Troubleshooting

Quick Links

Troubleshooting

Related Manuals for Brother HL-L8250CDN

Summary of Contents for Brother HL-L8250CDN

This manual is also suitable for:

Table of Contents