Page 1: Service Manual
Brother Color Laser Printer SERVICE MANUAL MODEL: HL-4040CN/4050CDN/4070CDW Read this manual thoroughly before maintenance work. Keep this manual in a convenient place for quick and easy reference at all times. February 2007 SM-PRN061 Confidential...
Page 2 Ltd., covering the latest product descriptions and specifications. The contents of this manual and the specifications of this product are subject to change without notice. Brother reserves the right to make changes without notice in the specifications and materials contained herein...
Page 3 (hereinafter referred to as "the machine"). This information is vital to the service personnel to maintain the high printing quality and performance of the machine. This service manual covers the HL-4040CN/4050CDN/4070CDW machines. This manual consists of the following chapters:...
Page 4 APPENDIX 1: WORKER SWITCH (WSW) Describes the functions of the worker switches, which can be divided into two groups: one is for customizing preferences designed for the destination and the other is for modifying preferences that match the machine to the environmental conditions. Use the latter group if the machine malfunctions due to mismatching.
Page 5: Table Of Contents
TABLE OF CONTENTS REGULATION.................... VIII SAFETY INFORMATION................XII CHAPTER 1 TROUBLESHOOTING ............1-1 1. INTRODUCTION ......................1-1 1.1 Precautions ........................1-1 1.2 Initial Check........................1-1 2. ERROR CODES ......................1-3 2.1 Error Indication ........................1-3 2.2 Error Cause and Remedy ....................1-5 2.2.1 Recoverable Error by User Check ................
Page 6 CHAPTER 3 DISASSEMBLY AND ASSEMBLY........3-1 1. SAFETY PRECAUTIONS....................3-1 2. PACKING ........................3-2 3. SCREW TORQUE LIST ....................3-3 4. LUBRICATION ......................3-6 5. OVERVIEW OF GEARS....................3-12 6. HARNESS ROUTING....................3-14 7. DISASSEMBLY FLOW ....................3-21 8. DISASSEMBLY PROCEDURE .................3-22 8.1 AC Cord..........................3-22 8.2 Toner Cartridge ........................ 3-22 8.3 Drum Unit .........................
Page 7 8.28 Front Door Sub....................... 3-72 8.29 EL Electrode Spring L/R....................3-73 8.30 Hook Cover/ Front Cover Release Button/ Button Spring/ Front Door Main ....3-74 8.31 Hook Shaft/ Hook/ Hook Spring ..................3-76 8.32 Engine PCB ASSY ......................3-77 8.33 Main PCB ASSY/ Ground Plate/ Ground Spring Plate ..........3-78 8.34 Waste Toner Near/Full Sensor ASSY................
Page 8 9. DISASSEMBLY PROCEDURE (LT-100CL) (HL-4050CDN/ 4070CDW ONLY)..3-130 9.1 LT Paper Tray ........................ 3-130 9.2 LT Cover Rear........................ 3-134 9.3 LT Cover Left........................3-135 9.4 LT Cover Right ....................... 3-136 9.5 LT Relay PCB ASSY ...................... 3-137 9.6 LT Solenoid ASSY......................3-138 9.7 Collar 6 ...........................
Page 9 1.4.18 Error Code Indication (Function code 82)............5-25 1.4.19 Developing Bias Voltage Correction (Function code 83)........5-25 1.4.20 Exit from the Maintenance Mode (Function code 99).......... 5-25 2. OTHER SERVICE FUNCTIONS ................5-26 2.1 Hidden Function Menus Enabled by Pressing Button(s) When Turning the Machine On........................
Page 10: Regulation
REGULATION <For Europe and Other countries> Radio interference (220 to 240 volt model only) This machine follows EN55022 (CISPR Publication 22)/Class B. Before you use this product, make sure that you use one of the following interface cables. (1) A shielded parallel interface cable with twisted-pair conductors and that it is marked IEEE 1284 compliant (For HL-4050CDN/ 4070CDW).
Page 11 Internal laser radiation Maximum radiation power: 25 mW Wave length: 780 - 800 nm Laser class: Class 3B EU Directive 2002/96/EC and EN50419 (European Union only) This equipment is marked with the recycling symbol below. It means that at the end of the life of the equipment you must dispose of it separately at an appropriate collection point and not place it in the normal domestic unsorted waste stream.
Page 12 Important A shielded interface cable should be used to ensure compliance with the limits for a Class B digital device. Changes or modifications not expressly approved by Brother Industries, Ltd. could void the user’s authority to operate the equipment. Confidential...
Page 13: Internal Laser Radiation
FDA regulations and must be attached to laser products marketed in the United States. MANUFACTURED: Brother Technology (Shenzhen) Ltd. NO6 Gold Garden Ind., Nanling Buji, Longgang, Shenzhen, China This product complies with FDA performance standards for laser products except for deviations pursuant to Laser Notice No.50, dated July 26, 2001.
Page 14: Safety Information
SAFETY INFORMATION Caution for Laser Product (WARNHINWEIS fur Laser drucker) CAUTION: When the machine during servicing is operated with the cover open, the regulations of VBG 93 and the performance instructions for VBG 93 are valid. CAUTION: In case of any trouble with the laser unit, replace the laser unit itself. To prevent direct exposure to the laser beam, do not try to open the enclosure of the laser unit.
Page 15 Definitions of Warnings, Cautions, Notes and Memos The following conventions are used in this manual: Mark Contents Warnings tell you what to do to prevent possible personal injury. Electrical Hazard icons alert you to a possible electrical shock. Hot Surface icons warn you not to touch machine parts that are hot. Cautions specify procedures you must follow or avoid to prevent possible damage to the machine or other objects.
Page 16 Safety Precautions Listed below are the various kinds of “WARNING” messages included in this manual. WARNING There are high voltage electrodes inside the machine. Before you clean the inside of the machine or replace parts, make sure that you have turned off the power switch and unplugged the machine from the AC power outlet.
Page 17 WARNING DO NOT use any type of spray to clean inside or outside of the machine. Doing this may cause a fire or electrical shock. If the machine becomes hot, blows smoke, or generates obscure odor, immediately turn off the power switch and unplug the machine from the AC power outlet. If metal objects, water or other liquids get inside the machine, immediately turn off the power switch and unplug the machine from the AC power outlet.
Page 18: Chapter 1 Troubleshooting
CHAPTER 1 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 19: Power Supply
<Power Supply> (1) The AC input power supply described on the rating plate of the machine should be within ±10% of the rated voltage. (2) The AC input power supply is within the regulated value. (3) The cables and harnesses are connected correctly. (4) The fuses are not blown.
Page 20: Error Codes
ERROR CODES 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 end user to quickly find out the problem. Error Indication The error codes shaded in the table below are recoverable errors if following the User Check items.
Page 21 Error Refer Error Refer Problem Problem codes codes 1-29 Machine cooling down inside Manual paper feeding is selected. 1-23 Fuser unit failure Request on developing bias voltage adjustment 1-23 Fuser unit failure 1-16 Engine communication error Request on auto color registration 1-23 Dirt on drum unit 1-24...
Page 22: Error Cause And Remedy
Error Cause and Remedy 2.2.1 Recoverable Error by User Check These errors are recoverable by following the message indicated on the LCD or following the items indicated in User Check. Error code 50 Drum End Soon Replace the drum unit User Check - Replace the drum unit with a new one.
Page 23 Error code 54 Fuser Unit End Replace the fuser unit User Check - Replace the fuser unit with a new one. - After replacing the fuser unit, reset the counter using the control panel on the machine. (Refer to “2.3 Parts Life Reset Function” in Chapter 2.) Error code 55 Laser Unit End...
Page 24 Error code 90 (MP) Size Mismatch Load <size> paper in Multi Purpose Tray and press Go. Incorrect paper size User Check - Check the paper size to be supported and load the appropriate size of paper. Error code 91 (T1) Size Mismatch Load <size>...
Page 25 Error code 98 Size Error Specify the correct paper size for Tray 2. Specified paper size is not supported for Tray 2 (LT). User Check - Select the correct paper size in the driver to match the paper in Tray 2. Error code 99 Size Error DX Press Cancel.
Page 26 Error code C9 DIMM Error Make sure that the DIMM is inserted correctly. Defective DIMM is installed. User Check - Check if the DIMM is installed correctly. - Replace the DIMM with a new one. Error code E0 Print Unable E0 Turn the power off and then back on again.
Page 27: Service Call Error
2.2.2 Service Call Error Check the User Check items first. If the same problem occurs follow each procedure in the order of the number described in the Step column in the table below. Error code 20(K) Print Unable 20 Turn the power off and then back on again. Laser diode failure (K) Error code 21(Y) Print Unable 21...
Page 28 Error code 25 Print Unable 25 Turn the power off and then back on again. Develop drive motor failure Error code 26 Print Unable 26 Turn the power off and then back on again. Belt drive motor failure Error code 27 Print Unable 27 Turn the power off and then back on again.
Page 29 Error code 2A Print Unable 2A Turn the power off and then back on again. Belt cleaner release sensor failure Step Cause Remedy Harness connection failure Check the harness connection between the belt between belt cleaner release cleaner release sensor PCB and belt cleaner sensor PCB and belt cleaner release solenoid and reconnect them.
Page 30 Error code 2C(K) Print Unable 2C Turn the power off and then back on again. Error code 2D(Y) Print Unable 2D Turn the power off and then back on again. Error code 2E(M) Print Unable 2E Turn the power off and then back on again. Error code 2F(C) Print Unable 2F Turn the power off and then back on again.
Page 31 Error code 31 Print Unable 31 Turn the power off and then back on again. Density sensor failure Error code 32 Print Unable 32 Turn the power off and then back on again. Density sensor shutter performance malfunction User Check - Check if there is a scratch, dirt or the like on the belt unit.
Page 32 Error code 35 Print Unable 35 Turn the power off and then back on again. NVRAM failure on Engine PCB Step Cause Remedy Engine PCB failure Replace the engine PCB ASSY. Error code 36 Print Unable 36 Turn the power off and then back on again. Transfer HVPS PCB failure Step Cause...
Page 33 Error code 38 Print Unable 38 Turn the power off and then back on again. THM sensor failure Error code 39 Print Unable 39 Turn the power off and then back on again. HUM sensor failure Step Cause Remedy Harness connection failure of Check the harness connection of the THM/HUM THM/HUM sensor sensor and reconnect it.
Page 34 Error code 3F Print Unable 3F Turn the power off and then back on again. Writing error into engine program Step Cause Remedy The machine is turned off Turn the power on. Resend the engine program while rewriting the data into data (DJF format) with the USB memory while the the engine program.
Page 35 Error code 58 Fuser Error Turn the power off, then on again. Leave the machine for 15 min. Error code 59 Self-Diagnostic Will Automatically Restart within 15 minutes. If the same error is detected again 15 minutes later, the message below is indicated. Print Unable 6A Turn the power off and then back on again.
Page 36 Error code 5F Waste Toner Soon Replace the waste toner box User Check - Replace the waste toner box with a new one. Step Cause Remedy Waste toner sensor failure Check the sensor performance following the procedure described in “Maintenance mode 32”.
Page 37 Error code 64(C), 65(M), 66(Y), 67(K) Ready * Sample: M is blinking. Replace the toner cartridge whose color is blinking. User Check - Gently shake the toner cartridge of the appropriate color from side to side and install it again. - Replace the toner cartridge of the appropriate color.
Page 38 Error code 68 Print Unable 68 Turn the power off and then back on again. Fuser unit failure (The side thermistor detects higher temperature than the specified value.) Error code 69 Print Unable 69 Turn the power off and then back on again. Fuser unit failure (The side thermistor detects lower temperature than the specified value.) Error code 6A Print Unable 6A...
Page 39 Error code 71 Print Unable 71 Turn the power off and then back on again. Polygon motor failure Error code 72 Print Unable 72 Turn the power off and then back on again. Beam detecting sensor (K) failure Error code 73 Print Unable 73 Turn the power off and then back on again.
Page 40 Error code 76 Print Unable 76 Turn the power off and then back on again. Fuser unit failure (The center thermistor detects rapid temperature rising.) Step Cause Remedy Fuser unit failure Replace the fuser unit. Error code 78 Print Unable 78 Turn the power off and then back on again.
Page 41 Error code 81 Calibrate Calibration failed. See Troubleshooting chapter in User’s Guide. Incorrect density sensor measurement value when implementing calibration from the control panel. Error code 82 Calibrate Calibration failed. Press Go, and try again. Density patch measurement is not completed normally when implementing calibration from the control panel.
Page 42 Error code 84 (Jam Rear) Jam Rear Open the Back Cover and remove the jammed paper. Error code 88 (Jam Inside) Jam Inside Open the Front Cover, pull out the Drum Unit completely and remove the jammed paper. Paper jam inside the machine User Check - Check if the paper is jammed.
Page 43 Error code 85 No Tray A Tray is not detected, install Tray 1. Tray 1 (T1) is not installed into the machine. User Check - Check if Tray 1 (T1) is installed into the machine. - Check if the paper is jammed in Tray 1 (T1). Step Cause Remedy...
Page 44 Error code 8A (T1) Jam Tray 1 Removed the jammed paper from Tray 1. Error code 8B (LT) Jam Tray 2 Removed the jammed paper from Tray 2. Error code 8C (MP) Jam MP Tray Remove the jammed paper from Multi Purpose Tray and press Go. Paper jam in the appropriate tray User Check - Check if the paper is jammed in the appropriate tray.
Page 45 Error code 8E Registration Registration failed. Press Go and try again. Auto color registration failure when implementing it from the control panel Error code 8F Registration Registration failed. See Troubleshooting chapter in User’s Guide. Sensor sensitivity adjustment failure when implementing auto color registration from the control panel Error code 9D Registration...
Page 46 Error code 93 No Paper Load <size> paper in Multi Purpose Tray. No paper in MP tray (MP) User Check - Load the paper into the MP tray. Error code 9A Manual Feed Load <size> Paper, and press Go. Manual paper feeding is selected. User Check - Load the paper into one of the trays, then press the Go button.
Page 47 Error code 95 No Paper Load <size> paper in Tray 2. No paper in Tray 2 (LT) Step Cause Remedy LT PE sensor failure Check the sensor performance following the procedure described in “Maintenance mode 32”. If any problem occurs, replace the LT paper feed frame unit.
Page 48 Error code C0(K) Cartridge Error Put the Black (K) Toner Cartridge back in. Identification failure for a new toner cartridge (K) Error code C1(Y) Cartridge Error Put the Yellow (Y) Toner Cartridge back in. Identification failure for a new toner cartridge (Y) Error code C2(M) Cartridge Error Put the Magenta (M) Toner Cartridge back in.
Page 49 Error code C4 Tray 2 Error Take out Tray 2 and push it back in firmly. Tray 2 (LT) plate-up function malfunction User Check - Check if Tray 2 (LT) is installed into the machine. Step Cause Remedy Connection failure between Replace the connector.
Page 50 Error code C8 Out of Memory Secure Print Data is full. Press Cancel and delete the previously stored data. RAM area for secure data full User Check - Delete the stored data. Step Cause Remedy Main PCB failure Replace the Main PCB ASSY. Error code CA Unusable Device Remove the Device.
Page 51 Error code CC No Fuser Unit Install the Fuser Unit. Fuser unit is not installed into the machine. User Check - Check if the fuser unit is installed into the machine. Step Cause Remedy Harness connection failure Check the harness connection between the fuser between fuser unit connector unit connector and engine PCB, and reconnect it.
Page 52 Electrodes location of the drum unit Fig. 1-2 Electrodes location of the front door unit ASSY Fig. 1-3 1-35 Confidential...
Page 53 Error code CE No Waste Toner Install the Waste Toner Box. Refer to the User’s Guide for how to install. Waste toner box is not installed into the machine. User Check - Check if the waste toner box is installed into the machine correctly. Step Cause Remedy...
Page 54 Error code E6 Print Unable E6 Turn the power off and then back on again. NVRAM error on main PCB Step Cause Remedy Main PCB failure Replace the main PCB ASSY. Error code EB Print Unable EB Turn the power off and then back on again. NVRAM reading error on laser unit Step Cause...
Page 55: Paper Feeding Problems
PAPER FEEDING PROBLEMS Problems related to paper feeding are end user recoverable if following the User Check items. If the same problem occurs again, follow each procedure in the order of the number described in the Step column in the tables below. No Feeding Step Cause...
Page 56: Paper Jam
Paper Jam Paper jam in the paper tray and front cover Step Cause Check Remedy Result Belt unit Does the belt unit move Replace the belt unit. malfunction correctly? Registration front Does the registration front Re-assemble the actuator catching actuator move smoothly? registration front actuator.
Page 57: Dirt On Paper
Dirt on Paper User Check - Check if the paper is loaded into the paper tray correctly. - Turn over the stack of paper in the paper tray, or try rotating the paper 180° in the paper tray. Step Cause Check Remedy Result...
Page 58: Image Defect Troubleshooting
IMAGE DEFECT TROUBLESHOOTING Image Defect Examples Light on the One color is light Faulty registration Dark whole page Poor fixing Completely blank Image distortion All one color Dirt on the back of paper Vertical streaks Vertical streaks in a Horizontal stripes light background White vertical streaks on one color image White horizontal stripes on one color image Faint print White spots on one color image One color spots or dirt One color band Downward fogging Horizontal lines Ghost Color Fogging of solid color misregistration Unstable color Hollow print density Fig. 1-4 1-41 Confidential...
Page 59: Diameter Of Rollers
Diameter of Rollers Image defects which appear periodically may be caused by failure of a roller. Specify the cause referring to the diameters of the rollers or pitch which appears in the image as shown in the table below. Parts name Diameter The pitch which appears in the image...
Page 60: One Color Is Light
One color is light User Check - Check the machine’s environment. High temperature and high humidity conditions can cause this problem. - Replace the toner cartridge or drum unit with a new one. - Implement calibration from the control panel. Step Cause Check...
Page 61: Poor Fixing
Dark User Check - Check the machine’s environment. High temperature and high humidity conditions can cause this problem. - Replace the toner cartridge or drum unit with a new one. - Implement calibration from the control panel. Step Cause Check Remedy Result Corona wire...
Page 62: Image Distortion
Completely blank User Check - Replace the toner cartridge or drum unit with a new one. Step Cause Check Remedy Result Developing bias Are the electrodes on the Clean both electrodes. voltage drum unit and machine conduction failure body dirty? Scanner harness Is the scanner harness Reconnect the scanner...
Page 63: All One Color
All one color Step Cause Check Remedy Result Corona wire Are the electrodes on the Clean both electrodes. failure drum unit of the appropriate color and machine body dirty? Is the corona wire Replace the drum unit. damaged? Transfer HVPS Is the problem solved Replace the transfer PCB failure...
Page 64: Vertical Streaks
Vertical streaks User Check - This problem may occur with noise which is caused by dirt on the corona wire in the drum unit. In this case, clean the corona wire with the wire cleaner. - Replace the drum unit with a new one. - Replace the toner cartridge with a new one.
Page 65: Horizontal Stripes
Horizontal stripes User Check - Clean the inside of the machine and the corona wire in the drum unit. - Replace the drum unit with a new one. Step Cause Check Remedy Result Dirt on the Are the electrodes on the Clean both electrodes charged electrode drum unit and machine...
Page 66: White Vertical Streaks On One Color Image
White vertical streaks on one color image User Check - Clean the scanner windows of the appropriate color with a soft lint-free cloth. - Replace the toner cartridge with a new one. - Check the machine’s environment. High temperature and high humidity conditions can cause this problem.
Page 67: Faint Print
Faint print User Check - Check that the machine is installed on a level surface. - Replace the toner cartridge with a new one. - Clean the scanner windows with a soft cloth. Step Cause Check Remedy Result Laser unit failure Is the problem solved Replace the laser unit.
Page 68 Note: If you have print quality problems, clean the drum unit as follows: (1) Pull the drum unit out of the machine and take all the toner cartridges out of the drum unit. (2) Turn the drum unit over by holding the handle. Make sure that the drum unit gears “1” are on the left hand.
Page 69 (4) Turn the drum unit gear toward you by hand while looking at the surface of the drum “1”. “1” Fig. 1-8 (5) When you have found the mark on the drum that matches the print sample, wipe the surface of the drum gently with a cotton swab until the dust or paper powder on the surface comes off.
Page 70: One Color Spots Or Dirt
One color spots or dirt User Check - Damp (wet) paper might be used. Try to change to freshly unpacked paper. - Toner may be empty. Replace the toner cartridge with a new one. - If the same problem occurs after printing a few pages, the adhesive of the label or the like, paper powder or dirt may be attached on the surface of the exposure drum.
Page 71: Horizontal Lines
Downward fogging of solid color User Check - Toner may be empty. Replace the toner cartridge with a new one. Step Cause Check Remedy Result Transfer HVPS Is the problem solved Replace the transfer PCB failure after replacing the HVPS PCB ASSY. transfer HVPS PCB ASSY? Charge HVPS...
Page 72: Color Misregistration
Color misregistration User Check - Implement the auto color registration by the panel operation. - Replace the belt unit with a new one. - Replace the drum unit with a new one. - Replace the waste toner box with a new one. Step Cause Check...
Page 73: Hollow Print
Unstable color density User Check - Replace the belt unit with a new one. - Replace the drum unit with a new one. - Replace the waste toner box with a new one. - Replace the toner cartridge with a new one. Step Cause Check...
Page 74: Software Setting Problems
Machine For Macintosh, has the Verify the product ID. connection product ID been verified? Product ID: HL-4040CN: 002E * HL-4050CDN: 002F * HL-4070CDW: 0030 * * Hexadecimal USB host relay Is the problem solved Replace the USB host PCB failure after replacing the USB relay PCB ASSY.
Page 75: Network Problems
NETWORK PROBLEMS User Check - Check the descriptions in the network user’s guide. - Try resetting the factory settings. Step Cause Check Remedy Result Wireless LAN Is the problem solved Replace the wireless PCB failure after replacing the LAN PCB ASSY. (HL-4070CDW) wireless LAN PCB ASSY?
Page 76: Others Problems
OTHERS PROBLEMS The machine is not turned on, or the LCD indication does not appear. Step Cause Check Remedy Result Harness Is the harness of the LCD Reconnect the LCD connection failure panel PCB ASSY panel PCB ASSY of LCD panel connected correctly? harness LCD panel PCB...
Page 77: Chapter 2 Periodical Maintenance
CHAPTER 2 PERIODICAL MAINTENANCE To avoid creating secondary problems by mishandling, follow the warnings below during maintenance work. WARNING - Always turn off the power switch and unplug the power cord from the power outlet before accessing any parts inside the machine. - 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 78: Periodical Replacement Parts
PERIODICAL REPLACEMENT PARTS Periodical Replacement Parts Periodical replacement parts are the parts to be replaced periodically to maintain product quality. These parts would affect the product quality if they loose their functionality even if they do not appear to be damaged or there is no change in their appearance. The periodical replacement parts listed in the table below should be replaced according to the service life.
Page 79: Procedures To Replace Periodical Replacement Parts
Procedures to Replace Periodical Replacement Parts 2.2.1 Fuser Unit & Toner Filter Frame ASSY <Uninstalling Procedure> (1) Open the Back cover. <Back side> Back cover Fig. 2-1 (2) Remove the two pan (washer) B M4x14 Taptite screws, and then pull out the Fuser unit to the back of the machine.
Page 80: Installing Procedure
(3) Remove the Toner filter frame ASSY from the Paper eject ASSY DX/SX. Paper eject ASSY DX/SX Toner filter frame ASSY Fig. 2-3 <Installing Procedure> (1) Assemble the Toner filter frame ASSY onto the Paper eject ASSY DX/SX. Paper eject ASSY DX/SX Toner filter frame ASSY Fig.
Page 81 (2) Put the Fuser unit into the machine and fix it with the two pan (washer) B M4x14 Taptite screws. <Back side> Taptite, pan (washer) B M4x14 (Tightening torque: 1.00 ±0.1 N m) Fuser unit Taptite, pan (washer) B M4x14 (Tightening torque: 1.00 ±0.1 N m) Fig.
Page 82 (3) Close the Back cover. <Back side> Back cover Fig. 2-7 (4) After replacing the Fuser unit, reset the counter. (Refer to “2.3 Parts Life Reset Function” in this chapter.) Confidential...
Page 83: Laser Unit
2.2.2 Laser Unit <Uninstalling Procedure> (1) Press the Front cover release button, and open the Front door unit ASSY. Front cover release button Front door unit ASSY Fig. 2-8 (2) Open the Back cover. <Back side> Back cover Fig. 2-9 Confidential...
Page 84 (3) Remove the two cup S M3x8 Taptite screws, and then remove the Back cover upper. Back cover upper Taptite, cup S M3x8 <Back side> Fig. 2-10 (4) Remove the two cup S M3x8 Taptite screws, and then remove the Back cover ASSY. Hook Taptite, cup S M3x8 Back cover ASSY...
Page 85 (5) Remove the cup S M3x8 Taptite screw and three cup B M4x12 Taptite screws. (6) Release the three Hooks on the bottom and the two hooks on the back side, and then remove the Side cover L ASSY. Note: When removing the Side cover L ASSY, pay attention to the Wire support rope.
Page 86 (9) Remove the two cup B M4x14 Taptite screws from the back side of the Top cover ASSY. Top cover ASSY Taptite, cup B M4x14 <Back side> Taptite, cup B M4x14 Fig. 2-14 (10) Remove the three cup S M3x8 Taptite screws from the front side of the Top cover ASSY. Top cover ASSY Taptite, cup S M3x8 <Front side>...
Page 87 (11) Release the six Hooks in the order of 11a to 11f. Then, incline the Top cover ASSY 45° to 90° to the left hand side and remove it from the Frame unit. Hooks Top cover ASSY Hooks Hooks Frame unit <Left side>...
Page 88 (13) Disconnect the Connector from the Wireless LAN PCB ASSY. (HL-4070CDW only) Wireless LAN PCB ASSY Connector Frame unit <Front side> Fig. 2-18 (14) Remove the four cup S M3x8 Taptite screws, and then remove the two Hook slopes. Hook slope Taptite, cup S M3x8 Hook slope <Front side>...
Page 89 (15) Remove the ten cup S M3x6 Taptite screws (9 pieces from the top and 1 piece from the front side), and then remove the Scanner cover. Scanner cover Taptite, cup S M3x6 Taptite, cup S M3x6 Taptite, cup S M3x6 Taptite, cup S M3x6 Frame unit <Front side>...
Page 90 (17) Remove the seven cup S M3x6 SR Taptite screws, and then remove the four Scanner holders and Laser unit. Scanner holder Taptite, cup S M3x6 SR Taptite, cup S M3x6 SR Laser unit Taptite, cup S M3x6 SR Taptite, cup S M3x6 SR Scanner holder Scanner holder Frame unit...
Page 91 (2) Connect the two flat cables (CN1, CN4) and one connector (CN8) into the Laser unit. Laser unit <Front side> Fig. 2-24 (3) Assemble the Scanner cover with the ten cup S M3x6 Taptite screws (9 pieces on the top and 1 piece on the front side).
Page 92 (4) Assemble the two Hook slopes with the four cup S M3x8 Taptite screws. Hook slope Taptite, cup S M3x8 Hook slope <Front side> Taptite, cup S M3x8 Frame unit Fig. 2-26 (5) Connect the Connector into the Wireless LAN PCB ASSY. (HL-4070CDW only) Wireless LAN PCB ASSY Connector Frame unit...
Page 93 (6) Connect the Connector (6pin) into the USB host relay PCB ASSY, and connect the Connector (5pin) into the LCD panel PCB ASSY. LCD panel PCB ASSY Connector (6pin) USB host relay PCB ASSY Connector (5pin) Frame unit Fig. 2-28 (7) Align the two Hooks of the front side of the Top cover ASSY with the Frame unit and catch the six Hooks at the same time.
Page 94 (8) Secure the three cup S M3x8 Taptite screws on the front side of the Top cover ASSY. Top cover ASSY Taptite, cup S M3x8 <Front side> Taptite, cup S M3x8 Taptite, cup S M3x8 Fig. 2-30 (9) Secure the two cup B M4x14 Taptite screws on the back side of the Top cover ASSY. Top cover ASSY Taptite, cup B M4x14 <Back side>...
Page 95 (10) Catch the Hooks of the Side cover R ASSY with the machine body in the order of 10a to 10e and fix the Side cover R ASSY with the two cup B M4x12 Taptite screws and two cup S M4x8 Taptite screws. Taptite, cup S M4x8 Hooks Side cover R ASSY...
Page 96 (12) Catch the Hooks of the Back cover ASSY and assemble it with the two cup S M3x8 Taptite screws. Hook Taptite, cup S M3x8 Back cover ASSY Hook Taptite, cup S M3x8 <Back side> Fig. 2-34 (13) Assemble the Back cover upper with the two cup S M3x8 Taptite screws. Back cover upper Taptite, cup S M3x8 <Back side>...
Page 97 (14) Close the Back cover. < Back side Back cover Fig. 2-36 (15) Close the Front door unit ASSY. Front door unit ASSY Fig. 2-37 (16) After replacing the Laser unit, reset the counter. (Refer to “2.3 Parts Life Reset Function” in this chapter.) 2-21 Confidential...
Page 98: Paper Feeding Kit (Pf Kit1, Pf Kit2)
2.2.3 Paper Feeding Kit (PF kit1, PF Kit2) <Uninstalling Procedure> (1) Pull out the Paper tray, and remove the paper from the Paper tray. Paper tray Fig. 2-38 (2) Release the two Hooks of the Separation pad ASSY, and then lift up the Separation pad ASSY.
Page 99 (3) Push both sides of the Separation pad ASSY inwards to release the Pins and remove the Separation pad ASSY from the Paper tray. (4) Remove the Separation pad spring from the Paper tray. Separation pad ASSY <Front side> Paper tray Separation pad spring Fig.
Page 100 (7) Slide the Roller holder ASSY to the direction of the arrows 7a, 7b and 7c in this order and remove it. <Upper side> <Front side> Paper feed frame unit Roller holder ASSY Fig. 2-42 <Installing Procedure> (1) Assemble the Roller holder ASSY onto the Paper feed frame unit in the order of the arrow 1a, 1b and 1c.
Page 101 (2) Turn the Roller holder ASSY to the direction of the arrow 2a, push the Lift arm to the direction of the arrow 2b and fix the Boss of the Roller holder ASSY into the hole of the Lift arm. Note: Check whether the Lift arm is moved by putting the Roller holder upwards.
Page 102 (5) Push both sides of the Separation pad ASSY inwards and put its Pins into the Paper tray. Note: Check that the Separation pad ASSY pivots up and down smoothly by pushing it gently. <Front side> Separation pad ASSY Paper tray Fig.
Page 103: Mp Paper Feeding Kit
2.2.4 MP Paper Feeding Kit <Uninstalling Procedure> (1) Press the Front cover release button, and open the Front door unit ASSY. (2) Release the two Hooks to remove the MP feed frame cover from the Front door unit ASSY. Hooks MP feed frame cover Front door unit ASSY <Front side>...
Page 104 (4) Lift up the Hook and release it in the direction of arrow 4a. Slide the Holder bush MP in the direction of arrow 4b, and then remove the Holder bush MP from the shaft of the MP roller holder ASSY. MP roller holder ASSY Holder bush MP Front door unit ASSY...
Page 105 (6) Remove the Separation pad ASSY MP from the Front door unit ASSY. (7) Remove the Separation pad spring MP. Note: Be careful not to loose the Separation pad spring MP. Separation pad spring MP Front door unit ASSY <Front side> Separation pad ASSY MP Fig.
Page 106 (3) Put the Holder shaft into the hole while holding the Separation pad ASSY MP. Slide the MP roller holder ASSY to the direction of the arrow 3b to re-assemble it. MP roller holder ASSY Separation pad ASSY MP Hole Holder shaft <Front side>...
Page 107 (5) Assemble the MP lift arm 2 with aligning it with the three Bosses provided on the Front door unit ASSY. Note: When assembling the MP lift arm 2, make sure that the shaft of the MP roller holder ASSY is put into the hole on the MP lift arm 2.
Page 108: Parts Life Reset Function
Parts Life Reset Function This function is provided for service personnel in order to reset the counter of each periodical replacement part and count the number of replacement times when replacing the periodical replacement parts. Pressing the two buttons in the normal status Panel Operation Function Go &...
Page 109: Chapter 3 Disassembly And Assembly
CHAPTER 3 DISASSEMBLY AND ASSEMBLY SAFETY PRECAUTIONS To avoid creating secondary problems by mishandling, follow the warnings and precautions below during maintenance work. HOT SURFACE 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 110: Packing
PACKING AC cord Accessory bag Option carton Option carton Toner cartridge C, M, Y, K IF cover Drum stopper L Machine Drum stopper R Belt lock R Belt lock L Carton Confidential...
Page 111: Screw Torque List
SCREW TORQUE LIST Tightening torque Location of screw Screw type Q'ty N m (kgf • cm) 0.80 ±0.1 (8 ±1) Tray cover ASSY Taptite, bind B M4x12 Fuser unit Taptite, pan (washer) B 1.00 ±0.1 (12 ±1) M4x14 0.80 ±0.1 (8 ±1) Back cover upper Taptite, cup S M3x8 Drive shaft holder...
Page 112 Tightening torque Location of screw Screw type Q'ty N m (kgf • cm) 0.80 ±0.1 (8 ±1) Ground plate Taptite, cup S M3x6 1.20 ±0.1 (12 ±1) Taptite, bind B M4x12 Main PCB ASSY Taptite, cup S M3x6 0.80 ±0.1 (8 ±1) 0.80 ±0.1 (8 ±1) Parallel connector Screw...
Page 113 Tightening torque Location of screw Screw type Q'ty N m (kgf • cm) 0.50 ±0.1 (5 ±1) Toner LED PCB Screw pan (S/P washer) M3x16 0.60 ±0.1 (6 ±1) Power inlet socket Taptite, flat B M3x10 Screw pan (S/P washer) 0.80 ±0.1 (8 ±1) Ground terminal M4x8...
Page 114: Lubrication
LUBRICATION Develop drive motor ASSY Motor shaft Develop gear plate ASSY 3 places BG2: BG-MU (2mm dia. ball) Paper feed/belt cleaner motor Gear 90R/24 Gear 80R/30 Gear 80R/30 3 places Gear 90R/24 3 places BG2: BG-MU (2mm dia. ball) Confidential...
Page 115 Gear stopper Gear 39/121 Gear 39/121 4 places (1 place x4) Gear 39/121 28 places (7 places x4) Gear 39/121 Drum drive ASSY BG2: BG-MU (2mm dia. ball) MP paper guide ASSY * Cross section of the MP paper guide ASSY 6 places (3 place x2) PG2: PG-661 (2mm dia.
Page 116 60 places (4 place x15) Gear 46/55 Gear 24 LT A spring is hung, installation part 2 places Clutch gear 45 Gear 45/40 Gear 32 LT In case of 2mm dia. ball x4 Gear 37/22 Gear 46 LT Gear 46/55 Gear 33 Gear 20A PG2: PG-661 (2mm dia.
Page 117 F roller AC LT F roller shaft LT 2 places LT frame R BG2: BG-MS (2mm dia. ball) F roller shaft LT F roller shaft LT 2 places LT frame L GE2: GE-676 (2mm dia. ball) Confidential...
Page 118 Paper feed drive shaft LT ASSY 4 places 4 places Bush AC LT LT frame L GE2: GE-676 (2mm dia. ball) PG2: PG-661 (2mm dia. ball) In case of 2mm dia. ball x2 Clutch gear 45 Clutch gear 45 2 places Clutch arm Fittings shaft PG2: PG-661 (2mm dia.
Page 119 Extension guide R In case of 2mm dia. ball x4 Extension guide L LT paper tray EM2: MOLYKOTE EM-D110 (2mm dia. ball) Side guide R Side guide R LT paper tray PG2: PG-661 (2mm dia. ball) 3-11 Confidential...
Page 120: Overview Of Gears
OVERVIEW OF GEARS DEVELOPER DRIVE Gear 35 LR0194001 Gear 98 10 LR0199001 LR0202001 Gear 100 11 LR0203001 Cupling gear 50 Gear 50/100 LR0201001 12 LR0203001 Cupling gear 50 Pendulum gear 50 Gear 45 LR0197001 13 LR0200001 Gear 38 Gear 38 LR0198001 14 LR0198001 Gear 35...
Page 121 PAPER EJECT PF DRIVE LR0482001 Eject roller gear 35 LR0316001 Gear Z35M75 LJ7365001 Idle gear 16B 36 LR0311001 PF drive gear Z23M75 LJ7365001 Idle gear 16B 37 LR0315001 Gear Z3218M0875 LJ7365001 Idle gear 16B 38 LR0326001 PU drive gear Z20M08 LJ7365001 Idle gear 16B 39 LR0309001...
Page 122: Harness Routing
HARNESS ROUTING Transfer HVPS PCB unit (Registration-mark sensor PCB ASSY 1, 2, Density sensor) Density sensor Registration-mark sensor PCB ASSY 2 Registration-mark sensor PCB ASSY 1 Registration relay PCB ASSY Ground plate 2 Transfer HVPS PCB unit Top cover panel ASSY (LCD panel PCB ASSY, USB host relay PCB ASSY) LCD panel PCB ASSY Hook Clamp Fan motor holder 40 USB host relay PCB ASSY Hooks Front Side frame L Main PCB ASSY 3-14 Confidential...
Page 123 T1 PE/edge sensor PCB ASSY, Belt cleaner release sensor PCB ASSY < A view > Engine PCB ASSY Belt cleaner release Belt cleaner release solenoid ASSY sensor PCB ASSY Side frame L Front Hook Clamp Hole Belt cleaner release ASSY Clamp SOL PCB sheet Belt cleaner release solenoid ASSY Belt cleaner release sensor PCB ASSY Belt cleaner release ASSY < A view > Hook Hook < B view > Paper feed frame unit Front Hole Side frame L PF CR harness holder < B view > Hook Hook Hook Hole T1 PE/edge sensor PCB ASSY Paper feed frame unit T1 PE/edge sensor PCB ASSY 3-15 Confidential...
Page 124 Wireless LAN PCB ASSY (HL-4070CDW only) Hooks Wireless LAN PCB ASSY Hook Fan motor holder 40 THM/HUM sensor holder ASSY Wireless LAN PCB ASSY Hole Front Hole Main PCB ASSY Side frame L Side frame L Develop release sensor PCB ASSY Hook Hook Side frame L Develop release sensor PCB ASSY Develop gear plate ASSY Clamp Clamps Engine PCB ASSY Front 3-16 Confidential...
Page 125 Laser unit Laser unit Front Hole Hole Develop gear plate ASSY Develop gear plate ASSY Side frame L Main PCB ASSY Laser unit Hole Hole Hook Clamp Clamp Develop press drive L ASSY Clamp Hooks Release drive holder Front Side frame L Engine PCB ASSY 3-17 Confidential...
Page 126 Toner sensor PCB ASSY K, Y, M, C (TE/NEW) Toner sensor PCB Hook ASSY M (TE/NEW) Hooks Toner sensor PCB Toner sensor PCB ASSY Y (TE/NEW) ASSY C (TE/NEW) Hook Hook Hooks Release drive holder Toner sensor PCB ASSY K (TE/NEW) Develop gear Front plate ASSY Clamp Release drive holder Side frame L Engine PCB ASSY Develop press drive L ASSY (Develop release motor ASSY, Front cover interlock switch ASSY) Front cover interlock Hook Develop release motor ASSY switch ASSY Interlock harness guide Side frame L Hole Clamps Develop press drive L ASSY Release drive holder Front cover interlock switch ASSY Interlock harness guide Front Hooks Clamp Engine PCB ASSY 3-18 Confidential...
Page 127 LVPS fan (PS) Front Frame R Charge HVPS PCB ASSY Hook Hook Harness holder 16AWG Hooks Hook LVPS fan (PS) PS PCB unit Back Front Power inlet socket Harness holder 16AWG Ground terminal Hooks Screw pan (S/P washer) M4x8 Frame R Power supply switch Power inlet socket PS PCB unit 3-19 Confidential...
Page 128 Paper feed/belt cleaner motor ASSY Front Hook Hook Drive frame unit ASSY Frame L Engine PCB plate Paper feed/belt cleaner motor ASSY Drum drive ASSY Hook Hook Engine PCB ASSY Hook Hook 3-20 Confidential...
Page 129: Disassembly Flow
DISASSEMBLY FLOW Disassembly / Re-Assembly (sec.) Basic Operation 5s / 5s 20s / 20s 10s / 10s 25s / 25s 5s / 5s 5s / 5s AC cord Toner cartridge Drum unit Paper tray Belt unit Waste toner box 8.21 8.10 20s / 20s 15s / 15s...
Page 130: Disassembly Procedure
DISASSEMBLY PROCEDURE AC Cord (1) Disconnect the AC cord from the Main body. Main body AC cord Fig. 3-1 Toner Cartridge (1) Press the Front cover release button, and open the Front door unit ASSY. Front cover release button Front door unit ASSY Fig.
Page 131 (2) Hold the Green handle of the Drum unit. Lift the drum unit up and then pull it out until it stops. Green handle Drum unit Fig. 3-3 Note: If you cannot pull the drum unit out, make sure that the front door unit ASSY is fully open as shown below.
Page 132 (3) Raise the Handle of the Toner cartridge to release the Locks. Then, hold the Handle of the Toner cartridge and pull it out of the drum unit. Handle Lock Lock Toner cartridge Fig. 3-5 (4) Repeat Step (3) for all the other Toner cartridges. Toner cartridge Fig.
Page 133: Drum Unit
Drum Unit (1) Pull up the Drum lock lever L, and release the lock. The drum lock lever R is also released engaging with the action of the lock lever L. <Front side> Drum lock lever R Drum lock lever L Drum lock lever L Fig.
Page 134 Note: If continuing the disassembly, always return the Drum lock lever L to the original (locking) position. Drum lock lever L <Front side> Fig. 3-9 3-26 Confidential...
Page 135: Belt Unit
Belt Unit (1) Lift up both sections “A” and “B” of the Belt unit slightly and pull it out. “A” Belt unit “B” Fig. 3-10 Waste Toner Box (1) Lift up the section “A” of the Waste toner box and pull it out. “A”...
Page 136: Paper Tray
Paper Tray (1) Close the Front door unit ASSY. (2) Pull out the Paper tray, and remove the paper from the Paper tray. Front door unit ASSY Paper tray Fig. 3-12 (3) Release the two Hooks of the Separation pad ASSY, and then lift up the Separation pad ASSY.
Page 137 (4) Push both sides of the Separation pad ASSY inwards to release the Pins and remove the Separation pad ASSY from the Paper tray. (5) Remove the Separation pad spring from the Paper tray. Separation pad ASSY <Front side> Paper tray Separation pad spring Fig.
Page 138: Dx Feed Assy (Hl-4050Cdn/ 4070Cdw Only)
(7) Turn the paper tray upside down. (8) Release the two Hooks to remove the Paper guide DX ASSY. <Bottom of tray> Hook Hook Paper guide DX ASSY Fig. 3-16 DX Feed ASSY (HL-4050CDN/ 4070CDW only) (1) Release the two Bosses to remove the DX feed ASSY. * Release the boss on the right hand side first.
Page 139: Mp Cover Assy/ Mp Paper Guide Assy
MP Cover ASSY/ MP Paper Guide ASSY (1) Open the MP cover ASSY. <Front side> MP paper guide ASSY MP cover ASSY Fig. 3-18 (2) Release the two Bosses of the MP paper guide ASSY. <Front side> Boss MP paper guide ASSY MP cover ASSY Boss Fig.
Page 140 (3) Lift up the MP paper guide ASSY align the MP paper guide ASSY with section “A” of the MP lower chute. Bend section “A” then, remove the MP paper guide ASSY. MP paper guide ASSY <Front side> MP paper guide ASSY “A”...
Page 141 Assembling Note: When assembling the MP paper guide ASSY, note the assembling method referring to the figure below. Boss A Boss A MP paper guide ASSY MP paper guide ASSY Boss B Boss B Fig. 3-22 3-33 Confidential...
Page 142: Mp Lift Arm 2/ Mp Roller Holder Assy
MP Lift Arm 2/ MP Roller Holder ASSY (1) Press the Front cover release button, and open the Front door unit ASSY. (2) Release the two Hooks to remove the MP feed frame cover from the Front door unit ASSY. Hooks MP feed frame cover Front door unit ASSY...
Page 143 (4) Release the Hook to slide the Holder bush MP in the direction of arrow 4b, and then remove the Holder bush MP from the shaft of the MP roller holder ASSY. MP roller holder ASSY Holder bush MP Front door unit ASSY <Front side>...
Page 144 (6) Remove the Separation pad ASSY MP from the Front door unit ASSY. (7) Remove the Separation pad spring MP. Note: Be careful not to loose the Separation pad spring MP. Separation pad spring MP Front door unit ASSY <Front side> Separation pad ASSY MP Fig.
Page 145: Fuser Unit/ Toner Filter Frame Assy
8.10 Fuser Unit/ Toner Filter Frame ASSY (1) Open the Back cover. <Back side> Back cover Fig. 3-28 (2) Remove the two pan (washer) B M4x14 Taptite screws, and then pull out the Fuser unit to the back of the machine. <Back side>...
Page 146 (3) Remove the Toner filter frame ASSY from the Paper eject ASSY DX/SX. Paper eject ASSY DX/SX Toner filter frame ASSY Fig. 3-30 Assembling Note: When assembling the fuser unit, make sure that the two Harnesses are placed in the groove and under the rib of the Plastic frame.
Page 147: Back Cover Upper
8.11 Back Cover Upper (1) Remove the two cup S M3x8 Taptite screws, and then remove the Back cover upper. Back cover upper <Back side> Taptite, cup S M3x8 Fig. 3-32 3-39 Confidential...
Page 148: Paper Eject Assy Dx/Sx
8.12 Paper Eject ASSY DX/SX (1) Remove the bind B M3x10 Taptite screw, and then remove the Drive shaft holder. <Back side> Drive shaft holder Paper eject ASSY DX/SX Taptite, bind B M3x10 Fig. 3-33 (2) Release the Hook to remove the Fuser drive gear 18 from the shaft. Paper eject ASSY DX/SX <Back side>...
Page 149 (3) Remove the two cup B M4x12 Taptite screws and cup S M3x6 Taptite screw. (4) Disconnect the connector. (HL-4050CDN/ 4070CDW only) (5) Remove the Paper eject ASSY DX/SX. Taptite, cup S M3x6 Connector Taptite, cup B M4x12 Paper eject ASSY DX/SX <Back side>...
Page 150: Back Cover Assy
Assembling Note: (1) Put the Drive shaft holder into the Shaft of the Frame unit. (2) Align the Hook and Pin of the Drive shaft holder with the hole on the Paper eject ASSY DX/SX while inclining the Drive shaft holder 10 degrees downwards. (3) Move the Drive shaft holder to the direction of the arrow 3 to align it with the screw hole of the Paper eject ASSY DX/SX, and secure the Drive shaft holder with the bind B M3x10 Taptite screw.
Page 151: Paper Guide Dx/ Hv Tr Top Cover
8.14 Paper Guide DX/ HV TR Top Cover (1) Release the two Bosses, and then remove the Paper guide DX from the Transfer HVPS PCB unit while lifting it up slightly. Note: When removing the Paper guide DX, be careful not to damage the two Ribs. Transfer HVPS PCB unit Boss Hook...
Page 152: Transfer Hvps Pcb Unit
8.15 Transfer HVPS PCB Unit (1) Disconnect the four Connectors from the Electrode head. Transfer HVPS PCB unit Electrode head Connector <Back side> Fig. 3-41 (2) Disconnect the flat cable (CN1) and two connectors (CN5, CN8) from the Registration relay PCB unit.
Page 153: Registration-Mark Sensor Pcb Assy 1, 2/ Density Sensor/ Registration Relay Pcb
(3) Remove the two cup S M3x6 Taptite screws, and then remove the Transfer HVPS PCB unit. <Back side> Transfer HVPS PCB unit Taptite, cup S M3x6 Taptite, cup S M3x6 Fig. 3-43 8.16 Registration-mark Sensor PCB ASSY 1, 2/ Density Sensor/ Registration Relay PCB/ Transfer HVPS PCB ASSY (1) Remove the bind B M3x8 Taptite screw, and then remove the Earth plate 3.
Page 154 (2) Remove the two bind B M3x8 Taptite screws, and then remove the Density shield plate 1. Taptite, bind B M3x8 Density shield plate 1 Transfer HVPS PCB unit Fig. 3-45 (3) Remove the cup S M3x6 Taptite screw, and then remove the Earth plate 2. Taptite, cup S M3x6 Earth plate 2 Transfer HVPS PCB unit...
Page 155 (4) Disconnect the Connector (CN3) of the Registration-mark sensor PCB ASSY 1. (5) Remove the bind B M3x8 Taptite screw, and then remove the Registration-mark sensor PCB ASSY 1 from the Density sensor holder. Taptite, bind B M3x8 Registration-mark sensor PCB ASSY 1 Connector Density sensor holder Blue (CN3)
Page 156 (8) Disconnect the Connector (CN7), and remove the two bind B M3x8 Taptite screws, and then remove the Density sensor. Note: Do not touch the Variable resistor on the back of the Density sensor. Variable resistor Density sensor Taptite, bind B M3X8 Connector Registration relay PCB ASSY Transfer HVPS PCB unit...
Page 157 (10) Turn the Transfer HVPS PCB ASSY upside down. Remove the bind B M3x8 Taptite screw from the Registration relay PCB ASSY. (11) Remove the Registration relay PCB ASSY from the Transfer HVPS PCB unit. Taptite, bind B M3X8 <Bottom side> Transfer HVPS PCB unit Registration relay PCB ASSY Fig.
Page 158 Assembling Note: When assembling the Registration relay PCB ASSY, put the section “A” of the Registration relay PCB ASSY into the section “B” of the Transfer HVPS PCB unit. “B” “A” Transfer HVPS PCB unit Registration relay PCB ASSY <Bottom side> Fig.
Page 159: Side Cover L Assy
8.17 Side Cover L ASSY (1) Remove the cup S M3x8 Taptite screw and three cup B M4x12 Taptite screws. (2) Release the three Hooks on the bottom and the two hooks on the back side, and then remove the Side cover L ASSY. Note: When removing the Side cover L ASSY, pay attention to the Wire support rope.
Page 160: Side Plate Lb
8.18 Side Plate LB (1) Remove the three cup S M3x6 Taptite screws, cup B M4x12 Taptite screw and cup S M4x8 Taptite screw, and then remove the Side plate LB. Taptite, cup S M4x8 Side plate LB Taptite, cup B M4x12 Taptite, cup S M3x6 <Left side>...
Page 161: Drum Unit Fan (Opc)
8.19 Drum Unit Fan (OPC) (1) Disconnect the Connector from the Engine PCB ASSY, and then remove the Drum unit fan (OPC). Drum unit fan (OPC) Label Connector Engine PCB ASSY <Left side> Fig. 3-57 Assembling Note: When assembling the Drum unit fan (OPC), place it so that the attached Label faces outwards. 3-53 Confidential...
Page 162: Side Cover R Assy
8.20 Side Cover R ASSY (1) Remove the two cup B M4x12 Taptite screws and two cup S M4x8 Taptite screws. (2) Release the one Hook on the front side, two Hooks on the bottom and the two Hooks on the back side, and then remove the Side cover R ASSY.
Page 163: Roller Holder Assy
8.21 Roller Holder ASSY (1) Push the Lift arm to the direction of the arrow 1a and release the boss of the Roller holder ASSY. Then, turn the Roller holder ASSY to the direction of the arrow 1b. Paper feed frame unit Lift arm Roller holder ASSY Boss...
Page 164: Paper Feed Frame Unit/ T1 Pe/Edge Sensor Pcb Assy
8.22 Paper Feed Frame Unit/ T1 PE/Edge Sensor PCB ASSY (1) Disconnect the three connectors (CN1, CN10, CN11) from Engine PCB ASSY. Engine PCB ASSY CN10 CN11 Fig. 3-61 (2) Close the Front door unit ASSY. Remove the cup S M3x6 Taptite screw and two bind B M3x10 Taptite screws.
Page 165 (4) Release the two Hooks to remove the PF CR harness holder. Hook Hook PF CR harness holder <Front side> Fig. 3-63 (5) Remove the Harness from the PF CR harness holder. Harness PF CR harness holder Fig. 3-64 3-57 Confidential...
Page 166 (6) Remove the five bind B M3x8 Taptite screws, and then remove the PF plate from the Paper feed frame. Taptite, bind B M3X8 Taptite, bind B M3X8 Taptite, bind B M3X8 PF plate Paper feed frame Fig. 3-65 (7) Release the Hook of the Separation roller bush to remove it. Then, remove the Separation roller drive shaft.
Page 167 (8) Remove the Edge actuator and PE actuator, and remove the Edge actuator spring. PE actuator Edge actuator spring Edge actuator Paper feed frame <Upper side> Fig. 3-67 (9) Release the three Hooks to remove the T1 PE/edge sensor PCB ASSY. T1 PE/edge sensor PCB ASSY Hook Hook...
Page 168 Assembling Note: When assembling the Paper feed frame unit, make sure to follow the procedure described below. (1) Put the belt cleaner release sensor harness and belt cleaner release solenoid harness through the hole on the paper feed frame. (2) Put the two harnesses above and T1 PE/edge sensor harness through the PF CR harness holder and put them out of the hole on the Side frame L.
Page 169 (4) Assemble the Lift arm, Feed roller shaft TR and Separation roller drive shaft of the Paper feed frame unit following the procedure described below. <Assembling the Lift arm> Implement the operations below while holding the status described in Step (3). 1) When pushing up the Roller holder ASSY with your hand, the end (section “A”) of the Lift arm goes down.
Page 170 <Assembling the Feed roller shaft TR> While moving the Paper feed frame unit to the left hand side, turn the Gear to align the section “C” with the Feed roller shaft TR and put the shaft into the section “C”. Gear Paper feed frame unit <Left side>...
Page 171 (5) Check the engagement of each roller and move the Paper feed frame unit to the left hand side of the main body until it stops to assemble it. <Left side> Side frame L Paper feed frame unit <Front side> Fig.
Page 172: Belt Cleaner Release Sensor Pcb Assy
8.23 Belt Cleaner Release Sensor PCB ASSY (1) Release the two Hooks to remove the Belt cleaner release ASSY from the Middle plate. Middle plate Hook <Front side> Hook Belt cleaner release ASSY Fig. 3-76 (2) Turn the Belt cleaner release ASSY upside down. Remove the bind B M3x8 Taptite screw, and then remove the SOL PCB sheet and Belt cleaner release sensor PCB ASSY.
Page 173: Thm/Hum Sensor Holder Assy
(3) Disconnect the Connector from the Belt cleaner release sensor PCB ASSY. Connector Belt cleaner release sensor PCB ASSY Fig. 3-78 8.24 THM/HUM Sensor Holder ASSY (1) Disconnect the three Connectors (CN2, CN3, CN11) from the Main PCB ASSY. (CN2: HL-4070CDW only) CN11 (HL-4070CDW only) Main PCB ASSY...
Page 174 (2) Disconnect the Connector (CN35) from the Engine PCB ASSY. Engine PCB ASSY CN35 Fig. 3-80 (3) Remove the one cup S M3x6 Taptite screw, and then remove the THM/HUM ground plate. (4) Remove the four cup S M3x6 Taptite screws. (5) Release the two Hooks to remove the THM/HUM sensor holder ASSY.
Page 175: Release Rack
8.25 Release Rack (1) Remove the Release rack spring from the Hook. Frame unit Hook Release rack spring <Left side> Fig. 3-82 (2) Remove the cup B M3x8 Taptite screw, and then remove the Release rack plate from the Release rack. (3) Remove the Release rack spring from the Release rack plate.
Page 176: Front Door Unit Assy
8.26 Front Door Unit ASSY (1) Remove the cup S M3x6 Taptite screw, and then remove the Earth. Frame unit Taptite, cup S M3x6 Earth <Left side> Front door unit ASSY Fig. 3-84 (2) Disconnect the six connectors (CN2, CN3, CN4, CN7, CN8, CN9) from the Engine PCB ASSY.
Page 177 (3) Remove the Retaining ring E3 fixing the Wire support rope, and then release the Wire support rope from the Shaft. Note: When removing the Retaining ring E3, be careful not to drop it into the machine. Shaft Wire support rope Retaining ring E3 Frame unit <Right side>...
Page 178 (5) Remove the Collar 3 from the Hinge shaft R, and then remove the Hinge shaft R from the Hinge plate R. (6) Remove the Front door unit ASSY from Frame unit. Frame unit Front door unit ASSY Collar 3 Hinge plate R Hinge shaft R <Front side>...
Page 179: Harness Cover Mp
Assembling Note: - When assembling the Front door unit ASSY onto the Hinge on the main body, make sure to align the Front door unit ASSY with the Hinge as shown in the figure below. Frame unit Hinge Front door unit ASSY <Front side>...
Page 180: Front Door Sub
8.28 Front Door Sub (1) Remove the five cup B M4x10 Taptite screws and one cup B M3x8 Taptite screw, and then remove the Front door sub. Taptite, cup B M4x10 Taptite, cup B M4x10 Front door unit ASSY Taptite, cup B M4x10 Taptite, cup B M3x8 <Left side>...
Page 181: El Electrode Spring L/R
8.29 EL Electrode Spring L/R (1) Remove the two bind B M3x8 Taptite screws, and then remove the EL electrode spring cover ASSY. EL electrode spring cover ASSY Taptite, bind B M3X8 Front door unit ASSY Fig. 3-93 (2) Remove the two bind B M3x8 Taptite screws, and then remove the EL spring harness ASSY and EL electrode spring L/R.
Page 182: Hook Cover/ Front Cover Release Button/ Button Spring/ Front Door Main
8.30 Hook Cover/ Front Cover Release Button/ Button Spring/ Front Door Main (1) Remove the two cup B M4x10 Taptite screws. Taptite, cup B M4x10 Taptite, cup B M4x10 Front door unit ASSY Front door main Fig. 3-95 (2) Remove the two cup B M4x10 Taptite screws. (3) Release the three Hooks to remove the Hook cover from the Front door unit ASSY.
Page 183 (4) Remove the Front cover release button and Button spring from the Hook cover. Front cover release button Front cover release button Button spring Button spring <Left side> Hooked Hooked Hook cover <Right side> Fig. 3-97 (5) Release the two Hooks to remove the Front door Main from the Front door unit ASSY. Front door unit ASSY Front door main Hooks...
Page 184: Hook Shaft/ Hook/ Hook Spring
8.31 Hook Shaft/ Hook/ Hook Spring (1) Remove the Hook shaft. Hook shaft MP unit ASSY <Left side> Fig. 3-99 (2) Remove the Hook and Hook spring L from the MP unit ASSY. (3) Remove the Hook and Hook spring R from the MP unit ASSY in the same way. Hook Hook spring L <Left side>...
Page 185: Engine Pcb Assy
8.32 Engine PCB ASSY (1) Disconnect all the connectors from the Engine PCB ASSY. Engine PCB ASSY CN31 CN29 CN43 CN42 CN40 CN30 CN38 CN32 CN34 CN36 CN41 CN37 CN39 CN33 CN35 CN28 CN27 CN26 CN10 CN25 CN21 CN11 CN14 CN20 CN24 CN18...
Page 186: Main Pcb Assy/ Ground Plate/ Ground Spring Plate
8.33 Main PCB ASSY/ Ground Plate/ Ground Spring Plate (1) Remove the cup S M3x6 Taptite screw and bind B M4x12 Taptite screw, and then remove the Ground plate. (2) Remove the two cup S M3x6 Taptite screws, and then remove the Ground spring plate. Ground spring plate Taptite, cup S M3x6 Frame unit...
Page 187 (4) Remove the cup S M3x6 Taptite screw and two screws (for the parallel interface: HL- 4070CDW only), and then remove the Main PCB ASSY as shown by arrows 4a and 4b. Main PCB ASSY Screws Frame unit Taptite, cup S M3x6 <Left side>...
Page 188: Waste Toner Near/Full Sensor Assy
8.34 Waste Toner Near/Full Sensor ASSY (1) Move the Positioning pin 1a as shown, and slide the Hooks to the direction of the arrow 1b, and then remove the Waste toner sensor holder from the Middle plate. Waste toner sensor holder Middle plate <Left side>...
Page 189 (3) Release the three Hooks of each Waste toner sensor to remove the two Waste toner sensors from the Waste toner sensor holder. Waste toner sensor <A view> Hook Waste toner sensor holder Hook “A” Hooks Hook Waste toner sensor Hooks Waste toner sensor Fig.
Page 190: Top Cover Assy
8.35 Top Cover ASSY (1) Remove the two cup B M4x14 Taptite screws from the back side of the Top cover ASSY. Top cover ASSY Taptite, cup B M4x14 <Back side> Taptite, cup B M4x14 Fig. 3-110 (2) Remove the three cup S M3x8 Taptite screws from the front side of the Top cover ASSY. Top cover ASSY Taptite, cup S M3x8 <Front side>...
Page 191: Top Cover Panel Assy
(3) Release the six Hooks in the order of 3a to 3f. Then, incline the Top cover ASSY 45° to 90° to the left hand side and remove it from the Frame unit. Hooks Top cover ASSY Hooks Hooks Frame unit <Left side>...
Page 192: Lcd Panel Pcb Assy
(2) Remove the three cup B M4x12 Taptite screws, and then remove the Top cover panel ASSY from the Top cover ASSY. Taptite, cup B M4x12 Taptite, cup B M4x12 Top cover panel ASSY Top cover ASSY LCD panel PCB ASSY Fig.
Page 193: Rubber Key Printed Assy
8.38 Rubber Key Printed ASSY (1) Remove the Rubber key printed ASSY from the Top cover panel ASSY. Rubber key printed ASSY Top cover panel ASSY Fig. 3-116 8.39 Key Cap Up, Down, L, R (1) Remove the Key cap up, down, L and R from the Top cover panel ASSY. Key cap L Key cap up Key cap down...
Page 194: Usb Host Relay Pcb Assy
8.40 USB Host Relay PCB ASSY (1) Remove the three bind B M3x8 Taptite screws and then remove the USB holder. Taptite, bind B M3X8 USB holder Top cover panel ASSY Fig. 3-118 (2) Remove the USB host relay PCB ASSY from the Top cover panel ASSY. USB host relay PCB ASSY Top cover panel ASSY Fig.
Page 195: Lcd Panel Assy/ Lcd Stopper
8.41 LCD Panel ASSY/ LCD Stopper (1) Release the two Pins of the LCD stopper from the Top cover ASSY while putting up the LCD panel ASSY. Top cover ASSY LCD panel ASSY LCD stopper Fig. 3-120 (2) Release the two Bosses of the Top cover ASSY from the LCD panel ASSY as shown in the figure below.
Page 196: Paper Chute
(3) Bend the LCD stopper to release the Pins, and then remove the LCD stopper from the LCD panel ASSY. LCD stopper LCD panel ASSY Fig. 3-122 8.42 Paper Chute (1) Remove the six cup B M4x12 Taptite screws. (2) Release the nine Hooks to remove the Paper chute from the Top cover panel ASSY. Taptite, cup B M4x12 Paper chute Taptite, cup B M4x12...
Page 197 (3) Remove the LCD stopper rubber from the Paper chute. LCD stopper rubber Paper chute Fig. 3-124 (4) Release the two Pins of the Paper stopper at the right and left hand sides and remove the Paper stopper from the Paper chute. Paper stopper Paper chute Fig.
Page 198: Top Cover R
8.43 Top Cover R (1) Remove the two cup B M4x12 Taptite screws, and then remove the Top cover R. Taptite, cup B M4x12 Top cover L ASSY Top cover R Fig. 3-126 8.44 Top Cover L ASSY Top cover L ASSY Taptite, cup B M3X6 Taptite, cup B M3X6 Earth spring...
Page 199: Wireless Lan Pcb Assy (Hl-4070Cdw Only)
8.45 Wireless LAN PCB ASSY (HL-4070CDW only) (1) Disconnect the Connector from the Wireless LAN PCB ASSY. Wireless LAN PCB ASSY Connector Frame unit <Front side> Fig. 3-128 (2) Remove the cup S M3x8 Taptite screw. (3) Release the three Hooks to remove the Wireless LAN holder from the Frame unit. Wireless LAN holder Taptite, cup S M3x8 Hooks...
Page 200 (4) Release the Hook to remove the Wireless LAN PCB ASSY from the Wireless LAN holder. Hook Wireless LAN holder Wireless LAN PCB ASSY Fig. 3-130 3-92 Confidential...
Page 201: Laser Unit/ Hook Slope
8.46 Laser Unit/ Hook Slope (1) Remove the four cup S M3x8 Taptite screws, and then remove the two Hook slopes. Hook slope Taptite, cup S M3x8 Hook slope <Front side> Taptite, cup S M3x8 Frame unit Fig. 3-131 (2) Remove the ten cup S M3x6 Taptite screws (9 pieces from the top and 1 piece from the front side), and then remove the Scanner cover.
Page 202 (3) Disconnect the two flat cables (CN1, CN4) and connector (CN8) from the Laser unit. Laser unit <Front side> Fig. 3-133 (4) Remove the seven cup S M3x6 SR Taptite screws, and then remove the four Scanner holders and Laser unit. Scanner holder Taptite, cup S M3x6 SR Laser unit...
Page 203: Develop Drive Motor Assy
8.47 Develop Drive Motor ASSY (1) Remove the Rack gear 27 from the Frame unit. Frame unit Rack gear 27 <Left side> Fig. 3-135 (2) Remove the Alum sheet frame from the Develop gear plate ASSY. (3) Remove the seven cup S M3x6 Taptite screws, and then remove the Develop gear plate ASSY from the Frame unit.
Page 204 (4) Remove the three cup S M3x6 Taptite screws, and then remove the Develop drive motor ASSY from the Develop gear plate ASSY. Taptite, cup S M3x6 Taptite, cup S M3x6 Develop drive motor ASSY Taptite, cup S M3x6 Develop gear plate ASSY Fig.
Page 205 Assembling Note: - When assembling the Develop gear pate ASSY, make sure to keep the Harness out of the Frame unit to prevent it from catching and going into the Develop gear plate ASSY. Frame unit Flat cable Harness Develop gear plate ASSY Fig.
Page 206 Assembling Note: - Always make sure to attach the Alum sheet frame after assembling the Develop gear plate ASSY and Flat cable. Attach the Alum sheet frame so that it is aligned with the corner of the square hole as shown in the figure below. Alum sheet frame Alum sheet frame Flat cable...
Page 207: Drum Drive Assy/ Drum Phase Sensor Pcb Assy 1, 2
8.48 Drum Drive ASSY/ Drum Phase Sensor PCB ASSY 1, 2 (1) Remove the Engine insulation sheet from the Harness shield plate, which is fixed with a two-sided adhesive tape. Harness shield plate Engine insulation sheet <Left side> Fig. 3-142 (2) Remove the three cup S M3x6 Taptite screws, and then remove the Harness shield plate from the Frame unit.
Page 208 (3) Remove the four cup S M3x6 Taptite screws, and then remove the Engine PCB plate. Frame unit Engine PCB plate Taptite, cup S M3x6 Engine insulation sheet Taptite, cup S M3x6 <Left side> Fig. 3-144 Assembling Note: When assembling the Engine PCB plate, make sure that the section “A” is caught on the Hook of the Drive frame unit ASSY.
Page 209 (4) Remove the two cup S M3x6 Taptite screws, and then remove the Drum drive motor 1. (5) Remove the two cup S M3x6 Taptite screws, and then remove the Drum drive motor 2. Frame unit Drum drive motor 2 Taptite, cup S M3x6 Drum drive motor 1 Taptite, cup S M3x6...
Page 210 (6) Remove the six bind B M4x12 Taptite screws, and then remove the Drum drive ASSY from the Frame unit. Note: Since the four Gears 39/121 of the Drum drive ASSY are assembled together, which makes one set, DO NOT replace only one gear. If their replacement is required, replace the complete Drum drive ASSY.
Page 211: Drive Frame Unit Assy
8.49 Drive Frame Unit ASSY (1) Remove the three bind B M4x12 Taptite screws, and then remove the Drive frame unit ASSY from the Frame unit. (2) Disconnect the Connector from the Drive frame unit ASSY. Frame unit Drive frame unit ASSY Connector Taptite, bind B M4x12 Drive frame unit ASSY...
Page 212: Paper Feed/Belt Cleaner Motor Assy
8.50 Paper Feed/Belt Cleaner Motor ASSY (1) Remove the four cup S M3x6 Taptite screws (2 pieces provided on each of the front and back sides), and then remove the Paper feed/belt cleaner motor ASSY from the Drive frame unit ASSY. Taptite, cup S M3x6 Paper feed/belt cleaner motor ASSY Drive frame unit ASSY...
Page 213: Develop Release Sensor Pcb Assy
8.51 Develop Release Sensor PCB ASSY (1) Remove the cup B M3x8 Taptite screw. (2) Remove the Develop release sensor PCB ASSY from the Frame unit. Disconnect the Connector from the Develop release sensor PCB ASSY. Frame unit Hook Connector Taptite, cup B M3x8 Develop release sensor PCB ASSY <Left side>...
Page 214 (2) Remove the three bind B M3x12 Taptite screws and cup B M3x12 Taptite screw, and then remove the Develop press drive L ASSY. Frame unit Taptite, bind B M3X12 Develop press drive L ASSY Taptite, bind B M3X12 Taptite, bind B M3X12 <Left side>...
Page 215 Assembling Note: - Assemble the Develop press drive L ASSY so that the section of the Pull up lever L, where the spring is hooked is placed as shown in the figure below. Develop press drive L ASSY Pull up lever spring (for L) Pull up lever L Section where the spring is hooked Fig.
Page 216: Front Cover Interlock Switch Assy
8.53 Front Cover Interlock Switch ASSY (1) Remove the Interlock switch holder spring and Interlock harness guide from the Develop press drive L ASSY. Interlock switch holder spring Hook B Hook D Hook B Interlock harness guide Develop press drive L ASSY Hook C Hook A Hook A...
Page 217: Toner Sensor Pcb Assy K, Y, M, C (Te/New)
8.54 Toner Sensor PCB ASSY K, Y, M, C (TE/NEW) (1) Remove the three cup B M3x10 Taptite screws, and then remove the Release drive holder from the Frame unit. Release drive holder Frame unit Taptite, cup B M3x10 <Left side > Taptite, cup B M3x10 Fig.
Page 218 (2) Remove the bind B M3x8 Taptite screw, and then remove the Toner sensor PCB ASSY K (TE/NEW) from the Frame unit. (3) Remove the cup B M3x8 Taptite screw, and then remove the TE protect film 2 and Toner sensor PCB ASSY Y (TE/NEW) from the Frame unit.
Page 219 Assembling Note: Assemble the Toner sensor PCB ASSY K, Y, M, C (TE/NEW) as shown in the figure below. For the method to arrange the harnesses, refer to “7. Toner sensor PCB ASSY K, Y, M, C (TE/NEW)”. Toner sensor PCB Toner sensor PCB ASSY M (TE/NEW) ASSY Y (TE/NEW)
Page 220 (6) Release the two Hooks of the LED holder to remove it from each of the four Toner sensor PCB ASSYs (TE/NEW). Hook Toner sensor PCB ASSY (TE/NEW) LED holder Hook Fig. 3-164 Assembling Note: Assemble the Toner sensor PCB ASSY (TE/NEW) so that the Shutter of the New toner actuator is put into the sensor section of the Toner sensor PCB ASSY (TE/NEW).
Page 221: New Toner Actuator/ New Toner Actuator Spring
8.55 New Toner Actuator/ New Toner Actuator Spring (1) Release the section “A” of the New toner actuator spring from the Hook of the Frame unit, and then remove the New toner actuator from the Fame unit. “A” Frame unit New toner actuator spring Hook New toner actuator...
Page 222: Side Plate R Assy
8.56 Side Plate R ASSY (1) Remove the four cup S M3x6 Taptite screws, four cup B M4x12 Taptite screws and screw pan (S/P washer) M4x8. (2) Remove the cup S M4x8 Taptite screw and screw pan (S/P washer) M4x8, and then remove the Side plate R ASSY from the Frame unit.
Page 223: Drum Lock Lever L
8.57 Drum Lock Lever L (1) Remove the Screw, bind M3x8, and remove the Drum lock lever plate L ASSY and then remove the Drum lock spring and Drum lock lever L from the Frame unit. Drum lock lever plate L ASSY Frame unit Drum lock spring <Left side >...
Page 224: Drum Lock Lever R
8.58 Drum Lock Lever R (1) Remove the Screw, bind M3x8, and remove the Drum lock lever plate R ASSY and then remove the Drum lock lever R from the Frame unit. Frame unit Screw, bind M3x8 <Front side> Drum lock lever R Drum lock lever plate R ASSY Fig.
Page 225: Charge Hvps Pcb Assy
8.59 Charge HVPS PCB ASSY (1) Remove the cup S M3x6 Taptite screw and two bind B M4x12 Taptite screws, and then release the four Hooks to remove the Charge HVPS PCB ASSY from the Frame unit. Hooks Frame unit <Right side>...
Page 226 Assembling Note: - Be careful not to loose the HVPS charge head, HVPS charge head spring, HVPS DEV head and HVPS DEV head spring. Before assembling the Charge HVPS PCB ASSY, check that these four parts are complete, and that they move smoothly. HVPS DEV head HVPS charge head HVPS DEV...
Page 227: Toner Led Pcb Assy
8.60 Toner LED PCB ASSY (1) Remove the Screw pan (p washer) M3x16, and then remove the Toner LED PCB from the Frame unit. <Right side> Toner LED PCB Frame unit Screw pan (p washer) M3x16 Fig. 3-177 (2) Release the two Hooks to remove the LED holder from the Toner LED PCB. (3) Remove the other three Toner LED PCBs in the same way.
Page 228: Fuser Unit Fan (Fu)
8.61 Fuser Unit Fan (FU) (1) Remove the Fuser unit fan (FU) from the Frame unit. Frame unit Fuser unit fan (FU) Label <Right side> Fig. 3-179 Assembling Note: When assembling the Fuser unit fan (FU), place it so that the attached Label faces outwards. 3-120 Confidential...
Page 229: Lvps Fan(Ps)
8.62 LVPS Fan(PS) (1) Remove the LVPS fan (PS) from the Frame unit. Frame unit <Right side> LVPS fan (PS) Label Fig. 3-180 Assembling Note: When assembling the LVPS fan (PS), place it so that the attached Label faces outwards. 3-121 Confidential...
Page 230: Air Intake Fan (Air)
8.63 Air Intake Fan (AIR) (1) Remove the Air intake fan (AIR) from the Frame unit. Frame unit Air intake fan (AIR) <Right side> Label Fig. 3-181 Assembling Note: When assembling the Air intake fan (AIR), place it so that the attached Label faces outwards. 3-122 Confidential...
Page 231: Ps Pcb Unit
8.64 PS PCB Unit (1) Remove the LVPS insulation sheet and LVPS V0 insulation sheet from the PS PCB unit. LVPS insulation sheet <Right side> PS PCB unit LVPS V0 insulation sheet Fig. 3-182 (2) Remove the Power supply switch from the Belt gear plate ASSY by pushing the Hooks inwards.
Page 232 (3) Remove the Screw pan (S/P washer) M4x8, and then remove the Ground terminal. (4) Remove the two Taptite, flat B M3x10, and then remove the Power inlet socket from the Frame unit. Frame unit <Back side> Taptite, flat B M3x10 Power inlet Screw pan Ground terminal...
Page 233 (6) Disconnect the four Connectors (CN2, CN101, CN102, CN103) from the PS PCB unit. PS PCB unit CN103 CN102 CN101 Fig. 3-186 Assembling Note: - Assemble the LVPS insulation sheet so that the section “A” is in the position as shown in the figure below.
Page 234 Assembling Note: - Assemble the Power supply switch so that the ON/OFF mark on the Power supply switch is aligned with the ON/OFF mark imprinted on the Belt gear plate ASSY. Power supply switch Belt gear plate ASSY Fig. 3-188 - When assembling the PS PCB unit, align it with the two Bosses on the Frame unit.
Page 235: Belt Unit Drive Motor Assy
8.65 Belt Unit Drive Motor ASSY (1) Release the three Hooks to remove the Harness holder 16AWG from the Belt gear plate ASSY. Belt gear plate ASSY <Right side> Hooks Harness holder 16AWG Hook Fig. 3-190 (2) Remove the three cup B M4x12 Taptite screws and Screw, cup M3x6, and then remove the Belt gear plate ASSY from the Frame unit.
Page 236 (3) Remove the bind B M3x10 Taptite screw, and then remove the LV fan duct from the Frame unit. Frame unit <Right side> LV fan duct Taptite, bind B M3X10 Fig. 3-192 (4) Remove the three cup B M4x12 Taptite screws, and then remove the Belt unit drive motor ASSY from the Frame unit.
Page 237 (6) Remove the two Screws bind M3x5, and then remove the Belt unit drive motor from the Motor plate P. Belt unit drive motor Screw bind M3x5 Motor plate P Fig. 3-194 3-129 Confidential...
Page 238: Disassembly Procedure (Lt-100Cl) (Hl-4050Cdn/ 4070Cdw Only)
DISASSEMBLY PROCEDURE (LT-100CL) (HL-4050CDN/ 4070CDW ONLY) LT Paper Tray (1) Pull out the LT paper tray, and remove the paper from the LT paper tray. LT paper tray Fig. 3-195 (2) Release the two Hooks of the LT separation pad ASSY, and then lift up the LT separation pad ASSY.
Page 239 (3) Push both sides of the LT separation pad ASSY inwards to release the Pins and remove the LT separation pad ASSY from the LT paper tray. LT separation pad ASSY <Front side> LT paper tray LT separation pad spring Fig.
Page 240 (5) Remove the two bind B M4x10 Taptite screws from the Pinch roller holder cover LT. (6) Release the four Hooks to remove the Pinch roller holder cover LT from the LT paper tray. Taptite, bind B M4x10 Hooks Taptite, bind B M4x10 Hook Pinch roller holder cover LT Hook...
Page 241 (8) Release the Pin to remove the Pinch roller sub ASSY from the LT paper tray. Pinch roller sub ASSY LT paper tray Pinch roller sub ASSY Fig. 3-201 3-133 Confidential...
Page 242: Lt Cover Rear
LT Cover Rear (1) Remove the four Shoulder screws from the LT cover rear. Shoulder screw LT cover rear Shoulder screw Shoulder screws Fig. 3-202 (2) Release the two Pins on the bottom to remove the LT cover rear. LT cover rear Fig.
Page 243: Lt Cover Left
LT Cover Left (1) Remove the three Shoulder screws from the LT cover left. Shoulder screw LT cover left Shoulder screws Fig. 3-204 (2) Release the two Hooks on the upper side and the two Hooks on the back side to remove the LT cover left.
Page 244: Lt Cover Right
LT Cover Right (1) Remove the three Shoulder screws from the LT cover right. Shoulder screw LT cover right Shoulder screw Shoulder screw Fig. 3-206 (2) Release the two Hooks on the upper side and the two Hooks on the back side to remove the LT cover right.
Page 245: Lt Relay Pcb Assy
LT Relay PCB ASSY (1) Disconnect the all connectors from the LT relay PCB ASSY. LT relay PCB ASSY Fig. 3-208 (2) Remove the cup S M3x6 Taptite screw, and then remove the LT relay PCB ASSY. Taptite, cup S M3x6 LT relay PCB ASSY Fig.
Page 246: Lt Solenoid Assy
LT Solenoid ASSY (1) Remove the cup S M3x6 Taptite screw, and then remove the Solenoid holder ASSY. Solenoid holder ASSY Taptite, cup S M3x6 Fig. 3-210 (2) Remove the Screw flanged M3X3.5, and then remove the LT solenoid ASSY and Solenoid spring MP from the LT solenoid holder.
Page 247: Collar 6
Collar 6 (1) Remove the two Collars 6 from the Fittings shaft. Collar 6 Collar 6 Fittings shaft Fig. 3-212 Cassette Switch ASSY (1) Remove the three cup S M3x6 Taptite screws and release the Hook. Then, remove the LT tray guide left rear ASSY.
Page 248 (2) Release the Hook to remove the Cassette actuator and Cassette actuator spring. Hook Cassette actuator spring LT tray guide left rear ASSY Cassette actuator Fig. 3-214 (3) Release the two Hooks to remove the Cassette switch ASSY. LT tray guide left rear ASSY Cassette switch ASSY Hooks Fig.
Page 249: Lt Paper Feed Frame Unit
LT Paper Feed Frame Unit (1) Remove the four cup S M3x6 Taptite screws, and then remove the LT front cover and LT beam F from the LT frame unit. LT beam F Taptite, cup S M3x6 Taptite, cup S M3x6 Taptite, cup S M3x6 LT front cover <Front side>...
Page 250 (3) Remove the Retaining ring E3 from the F roller shaft LT and remove the FR bush TR. F roller shaft LT FR bush TR Retaining ring E3 <Right side> Fig. 3-218 (4) Remove the Lift spring from the Hook of the Lift lever A. (5) Remove the F roller shaft LT from the LT frame unit by pushing right (5a), pull left end forward (5b) and remove leftwards (5c).
Page 251 Assembling Note: When assembling the F roller shaft LT, place the Rib of the Paper feed frame unit between the section “A” and “B” of the Lift lever B and align the section “B” with the Lever of the Paper feed holder.
Page 252 (7) Remove the Gear 20A from the Drive unit by releasing the Hook. Drive unit Hook <Left side> Gear 20A Fig. 3-222 (8) Remove the Gear 33 from the Drive unit by releasing the Hook. Drive unit Hook <Left side> Gear 33 Fig.
Page 253 (9) Remove the Extension spring LT from the Spring hook and remove the Gear 46/55 from the Drive unit by releasing the Hook. Drive unit Hook Spring hook <Left side> Extension spring LT Gear 46/55 Fig. 3-224 (10) Remove the Gear 46 LT from the Drive unit. Drive unit Gear 46 LT <Left side>...
Page 254 (11) Remove the two cup S M3x6 Taptite screws and one bind B M4x10 Taptite screw from the LT frame L unit. Taptite, cup S M3x6 Taptite, bind B M4x10 LT frame L unit <Left side> Fig. 3-226 (12) Turn the LT frame unit upside down. (13) Remove the two cup S M3x6 Taptite screws from the LT frame unit.
Page 255 (14) Turn the LT frame unit the correct way up. (15) Remove the two cup S M3x6 Taptite screws from the LT beam R. LT beam R Taptite, cup S M3x6 <Back side> Fig. 3-228 (16) Remove the cup S M3x6 Taptite screw from the LT frame unit. LT frame unit <Left side>...
Page 256 (17) Remove the LT paper feed frame unit from the LT frame unit by 17a and 17b. LT paper feed frame unit <Front side> LT frame unit Fig. 3-230 3-148 Confidential...
Page 257: Required After Parts Replacement
(Emulation, Font data) <What you need to prepare>  (1) Computer (Windows XP/2000 or later) Create a “hl4000” folder on the C drive, for example. (2) HL-4040CN/4050CDN/4070CDW target machine (3) A USB flash memory drive (4) The Firmware PCL/PS Program: LZXXXX_$.djf LZ0828_A.djf LZXXXX: First six digits are a parts number of the firmware.
Page 258 (8) The Download Utility (FILEDG32.EXE) Copy it into the “hl4000” folder that has been created in the C drive. (9) The Brother Maintenance USB Printer Driver (Maintenance_Driver.zip) Copy it into the “hl4000” folder that has been created in the C drive. Extract the copied file.
Page 259 <Procedures> Rewriting the firmware (PCL/PS Program, Main Program) Setting by country - How to rewrite the firmware by using the USB flash memory drive If you save program files in the USB flash memory drive and plug it into the USB direct interface, you can rewrite the firmware and set the country.
Page 260 Once this installation procedure has been carried out for a PC, no more driver/software installation will be required for that PC to identify machines. If the Brother Maintenance USB Printer Driver has been already installed to your PC according to this procedure, skip this section.
Page 261 Alert warning message of WHQL appears three times, Click Next to proceed. (7) If the device driver is successfully installed, the following message screen appears. Click Finish to return. (8) Connect the machine to your PC using the USB cable. Confidential...
Page 262 The following screen appears, indicating the detection of new hardware device by the system. Select “No, not this time.” And click Next. (10) Select “Install the software automatically (Recommended)” and click Next. Confidential...
Page 263 (11) Alert warning message of WHQL appears, Click Continue Anyway to proceed. Confidential...
Page 264 (12) Repeat the steps from (9) to (11) three times, and then complete its installation. (13) If the Brother Maintenance USB Printer driver is successfully installed, the following message screen appears. Click Finish to return. Confidential...
Page 265 After the installation procedure of the Brother Maintenance USB Printer driver is completed, refer to the following steps for the detailed procedures to rewrite the program files. If the Brother Maintenance USB Printer Driver has already been installed to your PC according to this procedure, start to rewrite the program files.
Page 266 Setting the serial number (1) Connect the computer to the machine with the USB cable. (2) Double-click the brmainte.EXE file (maintenance utility) which has been copied in the “hl4000” folder to start. (3) Select “Input Information” from Menu. Select the applicable model name. (4) Check the port (USB) that the machine is connected through and click “Serial No.”...
Page 267 Performing the Auto Registration (1) Press any of the Menu buttons ( , , OK or Back) to resume. (2) Press the button to choose “Color Correction”. (3) Press the OK button to the next menu level. Press the button to choose “Auto Regist.”.
Page 268: If You Replace The Engine Pcb
Flash ROM 0 (512 Kbyte): Engine Program <What you need to prepare>  (1) Computer (Windows XP/2000 or later) Create a “hl4000” folder on the C drive, for example. (2) HL-4040CN/4050CDN/4070CDW target machine (3) A USB flash memory drive (4) The Firmware: Engine Program: LZXXXX_$.djf LZ0833_A.djf LZXXXX: First six digits are a parts number of the firmware.
Page 269 (1) Save the necessary program file (Engine Program) to rewrite into the USB flash memory drive. (2) Connect the USB flash memory drive to the USB direct interface on the front of the machine. Fig. 4-2 (3) When the machine has recognized the USB flash memory drive, the “Checking device/ Please wait”...
Page 270 Performing the Color Calibration (1) Press any of the Menu buttons ( , , OK or Back) to resume. (2) Press the button to choose “Color Correction”. (3) Press the OK button to the next menu level. “Color Correction/ ColorCalibration” appears on the LCD, and then press the OK button.
Page 271: Chapter 5 Service Functions
CHAPTER 5 SERVICE FUNCTIONS MAINTENANCE MODE The maintenance mode is exclusively designed for the checking, setting and adjustments of the machine by using the buttons on the control panel. You can perform operational checks of sensors, perform a print test, display the log information or error codes, and modify the worker switch (WSW).
Page 272: List Of Maintenance-Mode Functions
List of Maintenance-mode Functions Function Code Function Refer to: EEPROM Parameter Initialization 1.4.1 (5-3) Test Pattern 1.4.2 (5-4) Worker Switch (WSW) Setting 1.4.3 [1] (5-5) Printout of Worker Switch (WSW) Data 1.4.3 [2] (5-6) Operational Check of LCD 1.4.4 (5-7) Operational Check of Control Panel PCB 1.4.5 (5-8) ROM Version Check...
Page 273: Detailed Description Of Maintenance-Mode Functions
Detailed Description of Maintenance-mode Functions 1.4.1 EEPROM Parameter Initialization (Function code 01, 91) <Function> The machine initializes the parameter, user switches, worker switches and assurance mode switch settings registered in the EEPROM, to the initial values. Entering function code 01 initializes almost all of the EEPROM areas, but entering 91 does not initialize some areas, as listed below.
Page 274: Test Pattern (Function Code 09)
1.4.2 Test Pattern (Function code 09) <Function> This function prints out a test pattern (Print Quality Check sheet) to allow the service personnel to check the print quality. <Operating Procedure> (1) Press the button to display “MAINTENANCE 09” on the LCD in the initial stage of the maintenance mode.
Page 275: Worker Switch (Wsw) Setting And Printout
PictBridge command delay time App. 1-2 Interval of time required for the developing bias voltage WSW55 App. 1-2 correction PS emulation function setting (HL-4040CN only) App. 1-3 WSW56 “Last Job Reprint” function setting App. 1-3 * Details of Worker Switch (WSW)
Page 276: Operating Procedure
[ 2 ] Printout of Worker Switch Data (Function code 11) <Function> The machine prints out the setting items of the worker switches and their contents specified. <Operating Procedure> (1) Press the button to display “MAINTENANCE 11” on the LCD in the initial stage of the maintenance mode.
Page 277: Operational Check Of Lcd (Function Code 12)
1.4.4 Operational Check of LCD (Function code 12) <Function> This function allows you to check whether the LCD on the control panel works normally. <Operating Procedure> (1) Press the button to display “MAINTENANCE 12” on the LCD in the initial stage of the maintenance mode.
Page 278: Operational Check Of Control Panel Pcb (Function Code 13)
1.4.5 Operational Check of Control Panel PCB (Function code 13) <Function> This function allows you to check the control panel PCB for normal operation. <Operating Procedure> (1) Press the button to display “MAINTENANCE 13” on the LCD in the initial stage of the maintenance mode.
Page 279: Rom Version Check (Function Code 25)
1.4.6 ROM Version Check (Function code 25) <Function> This function allows you to check the management information of the software programs such as version information, check sum. <Operating Procedure> (1) Press the button to display “MAINTENANCE 25” on the LCD in the initial stage of the maintenance mode.
Page 280: One Push Demo" Setting (Function Code 28)
1.4.7 “One Push Demo” Setting (Function code 28) <Function> The One Push Demo function is to implement demo printing by pressing the Go button, which is mainly used for sales promotion at the shop. It is disabled if printing from a PC even once. Therefore, it is necessary to change the setting so that the function is enabled again.
Page 281: Operational Check Of Sensors (Function Code 32)
1.4.9 Operational Check of Sensors (Function code 32) <Function> This function allows you to check each of the sensors. <Operational Procedure> (1) Press the button to display “MAINTENANCE 32” on the LCD in the initial stage of the maintenance mode. Then, press the OK button. (2) If the sensing status are as listed below, the LCD will show “C1P1R1C2P2R2L2T2”...
Page 282 Temperature and humidity sensors Sensing status (OK/NG) XX ° C/NG THM sensor HUM sensor XX%/NG XX ° C /NG Internal temperature sensor XX ° C /NG Belt unit temperature sensor Note: If the sensor detects the abnormal value, the machine displays “NG” on the LCD. (3) Change the detecting conditions to check that the indication on the LCD changes according to the sensor status.
Page 283 Develop press drive L ASSY MP PE sensor Front cover MP registration front sensor THM/HUM sensor holder ASSY MP unit ASSY THM/HUM sensor MP PE/sensor PCB ASSY LT connector Registration rear sensor LT tray guide left rear ASSY T1 registration front sensor LT sensor LT Paper feed frame unit LT PE sensor...
Page 284: Printout Of Eeprom Log (Function Code 40)
1.4.10 Printout of EEPROM Log (Function code 40) <Function> This function allows you to print the EEPROM logs described below. - ENG E2PDUMP: EEPROM of the ENGINE PCB (512byte) - MAIN E2PDUMP: EEPROM of the Main PCB (16Kbyte) <Operating Procedure> (1) Press the button to display “MAINTENANCE 40”...
Page 285: Usb Transfer Speed Change In The Pictbridge Mode (Function Code 45)
1.4.11 USB Transfer Speed Change in the PictBridge Mode (Function code 45) <Function> This function allows you to change the USB transfer speed in the PictBridge mode. If the digital camera which a user uses cannot be connected in the PictBridge mode, this function may make it possible.
Page 286: Paper Feeding And Ejecting Test (Function Code 67)
1.4.12 Paper Feeding and Ejecting Test (Function code 67) <Function> This function allows you to check that a sheet of paper is fed and ejected correctly by printing the grid pattern on a page. <Operating Procedure> (1) Press the button to display “MAINTENANCE 67” on the LCD in the initial stage of the maintenance mode.
Page 287: Sensitivity Adjustment Of Registration-Mark Sensor (Function Code 75)
1.4.14 Sensitivity Adjustment of Registration-mark Sensor (Function code 75) <Function> This function makes the registration-mark sensor to adjust its sensitivity compulsory. This function makes the machine to check the surface of the belt unit by using the registration-mark sensor as well. Description Adjust the sensitivity of the registration-mark sensor when the REGI_SENS ADJUST...
Page 288 < During the 1 or 3 adjustments > Error Messages Description Solution REGI_SENS ADJUST Failure in writing the electron Replace the engine PCB ASSY. volume to NVRAM Write Err The sensor status is high REGI_SENS ADJUST (1) Replace the registration-mark when the left registration- sensor PCB ASSY1.
Page 289: Printout Of Maintenance Information (Function Code 77)
1.4.15 Printout of Maintenance Information (Function code 77) <Function> This function allows you to print a list of all maintenance information including printer coverage information. The following terms are printed on the maintenance information only. Average coverage on each color (C/ M/ Y/ K). The average of the Average Coverage total printed area against the printable are on the Letter-size paper.
Page 290: Operational Check Of Fans (Function Code 78)
1.4.16 Operational Check of Fans (Function code 78) <Function> This function is to check whether each of fans is operating correctly or not. The following fans are checked. Parts Name Description Fuser unit fan Evacuate hot air of the fuser unit. Drum unit fan Evacuate hot air of the drum unit drive motor.
Page 291 Location of fans Exhaust Fuser unit fan (FU) Intake Air intake fan (AIR) Drum unit fan (OPC) LVPS fan (PS) Fig. 5-11 5-21 Confidential...
Page 292: Display Of The Machine's Log (Function Code 80)
1.4.17 Display of the Machine’s Log (Function code 80) <Function> The machine can display its log information on the LCD. This procedure allows you to reset the count when the parts are replaced or initialize the information. The representative terms and terms enable to initialize are given below. Reset Description Individually...
Page 293 Reset Description Individually Collectively WTNR_CH: Number of times the waste toner box has been replaced. WTNR_PG: Number of printed pages with the waste toner box. DRUM_CH: Number of times the drum unit has been replaced. DRUM_PG: Number of printed pages with the drum unit. BELT_CH: Number of times the belt unit has been replaced.
Page 294 <Operating Procedure> (1) Press the button to display “MAINTENANCE 80” on the LCD in the initial stage of the maintenance mode. Then, press the OK button. (2) Each time the Go button is pressed, one of the following log information terms appears on the LCD in the order.
Page 295: Error Code Indication (Function Code 82)
1.4.18 Error Code Indication (Function code 82) <Function> This function displays an error code of the machine on the LCD. <Operating Procedure> (1) Press the button to display “MAINTENANCE 82” on the LCD in the initial stage of the maintenance mode. Then, press the OK button. The machine displays “MACHINE ERROR X X”...
Page 296: Other Service Functions
OTHER SERVICE FUNCTIONS Hidden Function Menus Enabled by Pressing Button(s) When Turning the Machine On The following settings and functions will be available by holding down the specified button(s) while turning the machine on. Press one button when turning the machine on Button Function Not Used...
Page 297 Press two buttons when turning the machine on Panel Operation Function Back Flash Rom Updates Mode (UPD file/ Model classification is not available) (Don’t use) Not Used Back Engine Non-startup Mode ( - ) Line Test Mode (Don’t use) ( - ) HVPS Check Mode (Don’t use) Not Used...
Page 298: Develop Roller Counter Reset Function
Develop Roller Counter Reset Function Since print density is likely to become darker as the toner gets older, the developing bias is lowered by degrees (bias voltage is reduced) according to the number of develop roller rotations so that an almost fixed density can be maintained from the beginning to the end. You can check the developing bias voltage by printing the maintenance information (Function code in the maintenance mode).
Page 299: Printout Of Printer Settings
The machine prints “Printer Settings”. The “Printer Settings” is configured with three pages for HL-4040CN/ 4050CDN and four pages for HL-4070CDW (three pages if the wireless LAN is set to OFF). All pages have following terms in common; Title, Model name, Serial number. The setting indication is the same as the LCD setting information, supporting the following 18 languages.
Page 300 Page 1 This page includes various setting information of the machine. Each term is indicated when it fulfills the condition. Page 2 This page includes the printer information and the maintenance information in the following order. (1) Printer information The following terms are indicated in the order. - Main Controller Main ROM Version - Main Controller Sub ROM Version - Engine Controller ROM Version...
Page 301 Life of Drum Unit <How to read the drum unit life> - It initially indicates 100% and gradually decreases. - It indicates 0% when the “Drum End Soon” appears on the LCD. - It stays at 0% even if further printing is done. <How to calculate the drum unit life>...
Page 302 The number of drum rotations required for the color registration = 104 rotations Example: Performs the color registration adjustment and starts to print after leaving the machine without printing for a long time. Continuous printing Page counter based on the number of drum rotations (Pages) 1 page/job (104 + 27 + (4.6 x (1 - 1))) / 27 = 4.85 2 pages/job...
Page 303 Duplex tray, and it is not printed for HL-4040CN.) The maximum count for each item is 1 million times. The information above is not cleared when replacing the PF kit.
Page 304: How To Recover From Errors Of The Fuser Unit
How to Recover from Errors of the Fuser Unit How to recover from errors of the fuser unit is to use Function code 99 in the maintenance mode. Note: When clearing an error, be sure that the fuser unit is cooled down sufficiently. How to Clear and Delete the Password for “Setting Lock”...
Page 305: Chapter 6 Circuit Diagrams, Wiring Diagram
CHAPTER 6 CIRCUIT DIAGRAMS, WIRING DIAGRAM Main PCB Circuit Diagram (1/6) Main Asic (Ashura) MAIN ASIC(1/3) MAIN ASIC(2/3) C216 1608 R202 ASHURA ASHURA TP483 TP482 TP366 BLM11P300S (Asura:385pin 1mm pitch BGA) IORDN IO_RD_N SXOUT SSCG_AVDD +1.5V 3-1A/4-1A C158 C156 TP348 R152 IOWRN IO_WR_N...
Page 306 Main PCB Circuit Diagram (2/6) SDRAM,SODIMM,EEPROM R118 R118 0 R131 R131 0 50MHz 50MHz 50MHz 50MHz SD_CS0_N SD_CS0_N SDM_CS0_N SDM_CS0_N SD_CLK0 SD_CLK0 SDM_CLK0 SDM_CLK0 1-3D 1-3D 2B/2D/4B/4D 2B/2D/4B/4D 1-3C 1-3C R120 0 2B/2D/4B/4D 2B/2D/4B/4D R120 TP131 TP131 TP261 TP261 TP175 TP175 TP157 TP157...
Page 307 Main PCB Circuit Diagram (3/6) ROM, Board id, Debug Serial I/F ROM1 ROM0 ROM0_CS_N 1-3A TP359 ROM1_CS_N ROM1_CS_N 1-3A TP316 IO_WR_N IO_WR_N +3.3V 4-1A/1-3A TP344 IO_RD_N IO_RD_N 4-1A/1-3A TP242 JTAG RESET_N RESET_N 5-5E/1-1A/1-6B P2ROM P2ROM RA45 FLASH or P2(64Mbit) (128/64Mbit) (128/64Mbit) SGND MIRROR FLASH...
Page 308 Main PCB Circuit Diagram (4/6) LAN I/F, CDCC I/F, USB I/F MAC/PHY C174 TP410 SMD-49 25.00000MHZ CDCC GA XTAL1 R208 @R60 @U14 (Iutput) +3.3V SGND CDCC_RST_N RSTN/SIN VDD3 +3.3V TP394 1-6B @C96 (For ESD) @C100 CDCC TP433 TP424 C101 C103 XTAL2 16VDC a (1005)
Page 309 Main PCB Circuit Diagram (5/6) Engine I/F, Power supply, Reset IC, Panel I/F RB751V-40 POWER (SOT-223) LVDS 3.0A 300mA +3.3V +3.3V +6.8V +5.0V TP19 TP37 LD1117S50TR (TO CDCC,Panel,Super Cap.) +3.3V C122 TP49 (FCT) 10CE101FS SGND C121 10CE101FS C104 +3.3V C100 C100 C123 LVDS...
Page 310 Main PCB Circuit Diagram (6/6) TOPOLOGY (a)SDRAM SDRAM SDRAM Pin name SDCSN0 Main Pin name SDCLK0 Buffer Type TDOPAC33NN12 Main ASIC 50MHz ASIC 100MHz Output Buffer (3.3V) 12mA Buffer Type TDBIADIMNN** DIMM Buffer (SL4C=12mA) (SL4C=13mA) (c)CDCC I/F DIMM Pin name CDCCCLK Main (1)1BANK of X16 SDRAM...
Page 311 Engine PCB Circuit Diagram (1/5) DVCC22 +3.3V C18P DVCC41 LVPS1 Connection DVCC76 Low voltage power supply SGND R114 DVCC81 R113 +3.3V +3.3V TP97 System RESET DVSS20 +3.3V R333 +3.3V C22P SGND SGND SMD-49 10.00000MHZ DVSS39 TP114 TP117 +3.3V (1608) (1608) DVSS74 +3.3V TP41...
Page 312 Engine PCB Circuit Diagram (2/5) 20MHz CRNS_clk R177 1-3D R157 TP51 LD_PWR_PWM1 ld_pwr_pwm1 3-7C TP120 CRNS_rst_n RST_N CPU I/F 1-3D bd1_n BD1_N LD_PWR_PWM2 ld_pwr_pwm2 3-7C 3-7A (For ESD) TP150 C101 bd4_n BD4_N LD_PWR_PWM3 ld_pwr_pwm3 3-7A 3-7B R155 R181 TP151 LD_PWR_PWM4 ld_pwr_pwm4 SGND C113...
Page 313 Engine PCB Circuit Diagram (3/5) ROM, Board id, Debug Serial I/F ROM1 ROM0 ROM0_CS_N 1-3A TP359 ROM1_CS_N ROM1_CS_N 1-3A TP316 IO_WR_N IO_WR_N +3.3V 4-1A/1-3A TP344 IO_RD_N IO_RD_N 4-1A/1-3A TP242 JTAG RESET_N RESET_N 5-5E/1-1A/1-6B P2ROM P2ROM RA45 FLASH or P2(64Mbit) (128/64Mbit) (128/64Mbit) SGND MIRROR FLASH...
Page 314 Engine PCB Circuit Diagram (4/5) Paper Feed Solenoid Development Drive Motor +3.3V T1 SOL OPC Drum Motor1/2 DEV MTR (TDS-04C) CN12 CN22 TF16SN1.25TTD [0.5mm:500mA] R286 +24V +24V 4.7k (1608) R285 100 dev_lock 2-1B 1SS355 C212 TP260 C102 TP89 TP93 T1_SOL C210 t1_sol C101...
Page 315 Engine PCB Circuit Diagram (5/5) Development-Release sensor Thermister for Temperature in the machine T1 Paper empty/Paper edge sensor Photo-sensor LED VCC +3.3V +3.3V DEVREL SEN T1PE/PEDG CN34 R171 CN10 +3.3V R172 DEVREL_SEN devrel_sen 2-1D T1_PE_SEN t1_pe_sen 2-1E TP319 C105 REG-MARK sensor/Density sensor/ TP314 2SB1197K (RANK:R) (Paper empty...
Page 316 Charge High-voltage Power Supply PCB Circuit Diagram (1/4) 6-12 Confidential...
Page 317 Charge High-voltage Power Supply PCB Circuit Diagram (2/4) 6-13 Confidential...
Page 318 Charge High-voltage Power Supply PCB Circuit Diagram (3/4) 6-14 Confidential...
Page 319 Charge High-voltage Power Supply PCB Circuit Diagram (4/4) 6-15 Confidential...
Page 320 Transfer High-voltage Power Supply PCB Circuit Diagram (1/2) 6-16 Confidential...
Page 321 Transfer High-voltage Power Supply PCB Circuit Diagram (2/2) 6-17 Confidential...
Page 322 Wiring Diagram (1/2) CN37 CN31 FRONT COVER OPEN SW B512230 +5VI Interlock Switch +5VI BD PCB B512232 FRONT_COVER_SEN (SS-3FL30P-3(OMRON)) (Laser Power) +5VI +3.3V +3.3V AD_PD1 B2B-EH AD_PD1 3.3V CN26 AD_PD2 AD_PD2 REAR COVER OPEN SW PWR_PWM3 BD_n BD_n frnt_cov_sen AD_PD4 REAR_COV_SEN to CPU(GPIO) AD_PD4...
Page 323 Wiring Diagram (2/2) LINK +3.3V +3.3V CN12 +3.3V +3.3V(LED) MAC+PHY LED:Green/Yellow LAN Clock (SMSC:LAN91C115) 8MB or 16MB 8MB or 16MB TPI+/- Flash ROM (internal Logic:1.8V) 25.00MHz Flash ROM TPO+/- BEL:08B0-1X1T-03-F DATA SPEED LCD(16X1) +3.3V +3.3V +3.3V +3.3V +3.3V 16MB SDRAM 16MB SDRAM 16MB SDRAM 16MB SDRAM...
Page 324: Appendix 1 Worker Switch (Wsw)
Refer to: WSW54 PictBridge command delay time App. 1-2 WSW55 Interval of time required for the developing bias voltage App. 1-2 correction PS emulation function setting (HL-4040CN only) App 1-3 WSW56 “Last Job Reprint” function setting App 1-3 App.1-1 Confidential...
Page 325 The functions and settings for each worker switch (WSW) are described below; < WSW54 > Selector No. Function Setting and Specifications 0 : 100 msec (default) 1 : 0 msec PictBridge command delay time 0 : 50 msec 1 : 200 msec Not used Selector 1 and 2: PictBridge command delay time These selectors specify the PictBridge command delay time that applies when the...
Page 326 < WSW56 > Selector No. Function Setting and Specifications 0: Invalid (default) PS emulation function setting (HL-4040CN only) 1: Valid Not used 0: Invalid “Last Job Reprint” function setting 1: Valid (default) Not used Selector 3: “Last Job Reprint” function setting Setting this selector to “0”...
Page 327: Appendix 2 Deletion Of Personal Information
APPENDIX 2 DELETION OF PERSONAL INFORMATION Personal information such as wired and wireless network settings in the machine is recorded in the EEPROM on the Main PCB. Use Function code 01 in maintenance mode to delete this information with a single operation. (Refer to “1.4.1 EEPROM Parameter Initialization”...
Page 328: Appendix 3 Serial Numbering System
APPENDIX 3 SERIAL NUMBERING SYSTEM Each machine has a serial number label for the machine itself and property labels for some other parts. Refer to the information below for the meaning of the serial number and property codes and the location of each label. Serial number labels for the machine itself Serial number A 7 J 1 1 1 1 0 1...
Page 329 Waste toner box serial label Barcode C L C F 7 J 0 0 0 0 0 1 Z C L C F 7 J 0 0 0 0 0 1 Unique information Unit type Serial number (6-digit) Model type C: AC Manufacturing factory No.
Page 330 Belt unit serial label Barcode B L C F 7 J 0 0 0 0 0 1 Z B L C F 7 J 0 0 0 0 0 1 Unique information Unit type Serial number (6-digit) Model type C: AC Manufacturing factory No.
Page 331 Toner cartridge(K, Y, M, C) and Drum unit serial label Barcode TKCM7JA000001ELR1189 Part code Unit type DR: Drum unit Assembly line number TM: Toner unit Magenta Serial number (6-digit) TC: Toner unit Cyan TY: Toner unit Yellow Toner filling amount (A D, 5) TK: Toner unit Black Manufacturing factory No.
Page 332: Appendix 4 Screw Catalogue
APPENDIX 4 SCREW CATALOGUE App.4-1 Confidential...
Page 333: Appendix 5 References
APPENDIX 5 REFERENCES This page provides reference information. It is possible to get the full instructions of the subjects by just clicking on the links below. 1. Error codes (Refer to “2.1 Error Indication”, Chapter 1 of the Service Manual.) 2.

This manual is also suitable for:

Hl-4050cdn Hl-4070cdw

Brother HL-4040CN Service Manual

Chapter 1 Troubleshooting

Chapter 2 Periodical Maintenance

Chapter 3 Disassembly and Assembly

Chapter 4 Adjustments and Updating of Setting Required after Parts Replacement

Chapter 5 Service Functions

Chapter 6 Circuit Diagrams, Wiring Diagram

Appendix 1 Worker Switch (Wsw)

Appendix 2 Deletion of Personal Information

Appendix 3 Serial Numbering System

Appendix 4 Screw Catalogue

Appendix 5 References

Quick Links

SERVICE MANUAL

Troubleshooting

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Summary of Contents for Brother HL-4040CN