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Brother HL-820 Service Manual

Brother HL-820 Service Manual

Laser printer
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LASER PRINTER

SERVICE MANUAL

MODEL:HL-820/1020/1040/1050
Apr. '98
84U006BE0

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Summary of Contents for Brother HL-820

  • Page 1: Laser Printer

    LASER PRINTER SERVICE MANUAL MODEL:HL-820/1020/1040/1050 Apr. ‘98 84U006BE0...
  • Page 2 Specifications are subject to change without notice. Trademarks: The brother logo is a registered trademark of Brother Industries, Ltd. Apple, the Apple Logo, and Macintosh are trademarks, registered in the United States and other countries, and True Type is a trademark of Apple computer, Inc.
  • Page 3 (here- in-after referred to as "this machine" or "the printer"). This information is vital to the service technician to maintain the high printing quality and performance of the printers. This service manual covers the HL-820, 1020, 1040 and 1050 laser printers. (Note that any figures for the printer body are based on the HL-1040 printer.)

  • Page 4: Table Of Contents

    CONTENTS CHAPTER I FEATURES AND SPECIFICATIONS ..........I-1 1. FEATURES .........................I-1 2. SPECIFICATIONS ......................I-3 Printing............................I-3 Functions ...........................I-3 Electrical and Mechanical ......................I-4 Paper Specification ........................I-5 Print Delivery..........................I-5 Paper ............................I-6 Effective Printing Area .......................I-7 3. SAFETY INFORMATION ....................I-9 Laser Safety (110 - 120V Model only) ..................I-9 FDA Regulations (110 - 120V Model only) ................I-9 Caution for Laser Product......................I-10 CHAPTER II THEORY OF OPERATION ............
  • Page 5 Sensors...........................II-29 2.3.1 Cover Sensor......................II-29 2.3.2 Toner Empty Sensor....................II-29 Drum Unit..........................II-30 2.4.1 Photosensitive Drum ....................II-30 2.4.2 Primary Charger ......................II-30 2.4.3 Developer Roller......................II-30 2.4.4 Transfer Roller......................II-30 2.4.5 Cleaner Roller......................II-30 2.4.6 Erase Lamp ......................II-30 Print Process ..........................II-30 2.5.1 Charging ........................II-30 2.5.2 Exposure Stage ......................II-31 2.5.3 Developing.........................II-32...
  • Page 6 11. Main PCB Circuit Diagram, (HL-1050), (5/5)..............A-11 12. Panel Sensor PCB Circuit Diagram .................A-12 13. Low-voltage Power Supply PCB Circuit Diagram, HL-820/1020/1040 (110 - 120V) ..A-13 14. Low-voltage Power Supply PCB Circuit Diagram, HL-820/1020/1040 (220 - 240V) ..A-14 15. Low-voltage Power Supply PCB Circuit Diagram, HL-1050 (110 - 120V) ......A-15 16.

  • Page 7: Chapter Ifeatures And Specifications

    CHAPTER I FEATURES AND SPECIFICATIONS FEATURES This printer has the following features: High Resolution and Fast Printing Speed <HL-820> True 600 dots per inch (dpi) with microfine toner and 8 pages per minute (ppm) printing speed (A4 or Letter paper). <HL-1040/1020>...
  • Page 8 Low Running Cost The toner cartridge is separate from the drum unit. You need to replace only the toner cartridge after around 2,400 pages, which is cost effective and ecologically friendly. The actual number of pages printed with each toner cartridge may vary depending on your average type of print job.

  • Page 9: Specifications

    6P (PCL level 6), EPSON FX-850, and IBM Proprinter XL Printer driver Windows 3.1/3.11, Windows 95 and Windows NT 4.0 driver, supporting Brother Native Compression mode and bi-directional capability. Optional Macintosh driver available for System 6.0.7 or higher (for HL- 1040/1050 only)

  • Page 10: Printing

    The peak figure of power consumption is worked out when the halogen heater lamp is turned ON. The peak figure of power consumption is worked out excluding inrush current value. Be sure that the peak figure of power consumption is reference value and should be used inside the Brother offices only.

  • Page 11: Print Delivery

    Paper Loading Multi-purpose sheet feeder loading Paper size: A4, Letter, Legal, B5, A5, A6, and Executive. Other sizes of media that can be handled by the feed mechanism can be loaded. 69.8 to 229 mm 105 to 356mm (face down) Feeding direction Feedable paper weight: 60 (16lb.) to 158 (42lb.) g/m Maximum load height :...

  • Page 12: Paper

    PR98184 Paper Paper type Normal paper (60 to 157g/m , specified types of high-quality paper) • A4 size • Letter size • Legal size • B5 (JIS ISO) size • A5 size • A6 size • Executive size * The recommended types of plain paper are as follows: Letter : Xerox 4200 (75g/m A4 : Xerox 80 Premier Paper (80g/m...

  • Page 13: Effective Printing Area

    Effective Printing Area Printable area The effective printing area means the area within which the printing of all the data received without any omissions can be guaranteed.
  • Page 14 PR98184 The table below shows the effective printing areas. Size 210.0mm 297.0mm 203.2mm 288.5mm 3.4mm 4.23mm 8.27” 11.69” 8.0” 11.36” 0.13” 0.17” (2,480 dots) (3,507 dots) (2,400 dots) (3,407 dots) (40 dots) (50 dots) 215.9mm 279.4mm 203.2mm 270.9mm 6.35mm Letter 8.5”...

  • Page 15: Safety Information

    This product complies with FDA radiation performance standards, 21 CFR Subchapter J. The label for Chinese manufactured products MANUFACTURED : BROTHER Corporation (Asia) Ltd. Shenzen Buji Nan Ling Factory Gold Garden Ind., Nan Ling Village, Buji, Rong Gang, Shenzhen, CHINA This product complies with FDA radiation performance standards, 21 CFR Subchapter J.

  • Page 16: Caution For Laser Product

    Caution for Laser Product (Warnhinweis für Laserdrucker) 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 17: Chapter Ii Theory Of Operation

    CHAPTER II THEORY OF OPERATION ELECTRONICS General Block Diagram HL-820/1020 Fig. 2-1 shows a general block diagram of the HL-820/1020 printer. Control system Interface block Video control block Engine control block Operation block (Operation panel) Erase lamp Paper tray unit...
  • Page 18 HL-1040 Fig. 2-2 shows a general block diagram of the HL-1040 printer. Optional I/F board (Mac. RS-232C) Control system Expansion I/O Interface block Video control block Engine control block Operation block (Operation panel) Erase lamp Paper tray unit Drive block Laser scanner unit (Stepping motor) Paper tray...
  • Page 19 HL-1050 Fig. 2-3 shows a general block diagram of the HL-1050 printer. Optional RAM (SIMM) Optional I/F board (max. 32Mbytes) (Mac. RS-232C) Control system Expansion memory I/O Expansion I/O Interface block Video control block Engine control block Operation block (Operation panel) Erase lamp Paper tray unit Drive block...

  • Page 20: Main Pcb Block Diagram

    Main PCB Block Diagram HL-820/1020 Fig. 2-4 shows the block diagram of the main PCB. A S I C CPU Core (MC68EC000) Reset Circuit Oscillator (15.3MHz) Address Decoder DRAM Control Program + Font ROM 512 Kbytes Timer (2.0 Mbytes) FIFO...
  • Page 21 HL-1040 Fig. 2-5 shows the block diagram of the main PCB. A S I C CPU Core (MC68EC000) Oscillator (15.3MHz) Reset Circuit Address Decoder DRAM Control Program + Font ROM 512 Kbytes Timer (2.0 Mbytes) FIFO DATA EXTENSION Option Serial I/O (RS232C &...
  • Page 22 HL-1050 Fig. 2-6 shows the block diagram of the main PCB. A S I C CPU Core (MB86831) Oscillator (33.3MHz) Reset Circuit Address Decoder DRAM Control Program + Font ROM 4.0 Mbytes Timer (4.0 Mbytes) FIFO Option RAM (SIMM) CDCC Parallel I/O To PC (max.

  • Page 23: Main Pcb

    Main PCB 1.3.1 CPU Core HL-820/1020/1040 Fig. 2-7 shows the CPU circuit block on the main PCB. The CPU is a Motorola MC68EC000FN16 which is driven with a clock frequency of 15.3MHz. This clock frequency is made by dividing the source clock of 30.67 MHz into two.
  • Page 24 HL-1050 Fig. 2-8 shows the CPU circuit block on the main PCB. The CPU is a Motorola MB86831 which is driven with a clock frequency of 33MHz. The CPU itself runs at 66MHz. Fig. 2-8 II-8...

  • Page 25: Asic

    1.3.2 ASIC HL-820/1020/1040 The ASIC is composed of a Cell Based IC that contains the following functional blocks. Oscillator circuit Generates the main clock for the CPU by dividing the source clock frequency into two. Address decoder Generates the CS for each device.
  • Page 26 CPU Receive Mode STROBE BUSY 90 µsec 0.5 µsec DMA Receive Mode STROBE BUSY 1.5 µsec 0.5 µsec BUSY goes HIGH at the falling edge of STROBE. The data (8 bits) from the PC is latched in the data buffer at the rising edge of STROBE. The pulse width of ACK differs according to the speed MODE as shown above.
  • Page 27 (11) Engine control I/O This I/O is used for the connection to the panel sensor PCB. It controls the main motor, solenoid, sensors, etc. Fig. 2-9 II-11...
  • Page 28 HL-1050 The ASIC is composed of a Cell Based IC that contains the following functional blocks. Oscillator circuit Generates the main clock for the CPU. Address decoder Generates the CS for each device. DRAM control Generates the RAS, CAS, WE, OE and MA signals for the DRAM and controls refresh processing (CAS before RAS self-refreshing method).
  • Page 29 CPU Receive Mode STROBE BUSY 90 µsec 0.5 µsec DMA Receive Mode STROBE BUSY 1.5 µsec 0.5 µsec BUSY goes HIGH at the falling edge of the STROBE signal. The data (8 bits) from the PC is latched into the data buffer at the rising edge of the STROBE signal. The pulse width of ACK varies according to the speed MODE as shown above.
  • Page 30 (11) Engine control I/O This I/O is used for the connection to the panel sensor PCB. It controls the main motor, solenoid, sensors, etc. Fig. 2-10 II-14...

  • Page 31: Rom

    1.3.3 HL-820/1020/1040 A program file of 512 Kbytes and the font data are stored in the ROM. A 42-pin IC socket is provided: a 16 Mbits ROM (42-pin) is mounted into this socket normally, but a 4 Mbits ROM (40-pin) can be mounted by leaving the 1st and 42nd pins of the socket open circuit.

  • Page 32: Dram

    1.3.4 DRAM HL-820/1020/1040 A 16M-bit DRAM (x 16bits) is used as the RAM. Fig. 2-13 HL-1050 Two 16M-bit DRAMs (x 16bits) are used as the RAM. Fig. 2-14 II-16...

  • Page 33: Optional Ram

    1.3.5 Optional RAM HL-1050 A 32bit (72 pin) SIMM can be fitted as optional RAM. The main PCB has one slot and the capacity of SIMM can be from 1 Mbyte to 32 Mbytes. Fig. 2-15 II-17...

  • Page 34: Optional Serial I/O

    CPU. Fig. 2-16 1.3.7 EEPROM HL-820/1020/1040 The EEPROM is an XL24C01AF type of two-wire method with a 128 x 8 bits configuration. M62320FP is an IC which transfers the data received from the serial I/O to the parallel I/O.

  • Page 35: Reset Circuit

    1.3.8 Reset Circuit HL-820/1020/1040 The reset IC is a PST598DNR. The reset voltage is 4.2V (typ.) and the LOW period of reset is 200ms (typ). Fig. 2-19 HL-1050 The reset IC is a PST596DNR. The reset voltage is 4.2V (typ.) and the LOW period of reset is 50ms (typ).
  • Page 36 HL-1050 Fig. 2-22 shows the CDCC interface circuit. Fig. 2-22 II-20...

  • Page 37: 1.3.10 Engine I/O

    1.3.10 Engine I/O HL-820/1020/1040 Fig. 2-23 shows the engine interface circuit. Fig. 2-23 II-21...
  • Page 38 HL-1050 Fig. 2-24 shows the engine interface circuit. Fig. 2-24 II-22...

  • Page 39: 1.3.11 Paper Feed Motor Drive Circuit

    1.3.11 Paper Feed Motor Drive Circuit HL-820/1020/1040 The motor driver is a TR array. The excitation method is 2-2 phase excitation with a bipolar drive. Fig. 2-25 HL-1050 The motor driver is a TR array. The excitation method is 2-2 phase excitation with a bipolar drive.

  • Page 40: Panel Sensor Pcb

    The regulated output and the production code of each power supply vary depending on the printer model as listed below; Model Regulated Output Production Code +5V / 0.6 A 100V: MPW1547 HL-820/1020/1040 +24V / 2.0 A 200V: MPW1447 +5V / 1.2A 100V: MPW1550 HL-1050 +24V / 2.0A...

  • Page 41: High-Voltage Power Supply, Sr Pcb

    1.5.2 High-voltage Power Supply This generates and outputs the voltages and currents for the charging, development and transfer functions. Current 24VI Regulator Transfer Roller Voltage Regulator Supply Roller Photosensitive Drum VR22 Developing Cleaner Roller Roller Current Regulator Corona Unit Voltage Regulator B101 Q101 Current...

  • Page 42: Mechanics

    MECHANICS Overview of Printing Mechanism Papers Multi-purpose Sheet Feeder Manual Paper Path MP Feeder Cover Paper Pick-up Roller Paper Feed Drum Unit Roller Photosensitive Drum Pinch Roller Transfer Erase Lamp Blade Roller Fixing Unit Hopper Pressure Roller Plate Registration Sensor Lever Eject Roller Eject Sensor Toner Cartridge...

  • Page 43: Paper Transfer

    Paper Transfer 2.2.1 Paper Supply The pick-up roller picks up one sheet of paper from the paper feeder every time it is rotated and feeds it to the paper feed roller. Pick-up roller Papers Registration sensor lever Hopper plate Separation pad Fig.

  • Page 44: Paper Eject

    2.2.3 Paper Eject The completion of paper eject is detected in the following manner: When the leading edge of the paper pushes down the eject sensor actuator located in the fixing unit, the photo sensor (photo interrupter) is opened and detects the start of paper eject.

  • Page 45: Sensors

    Sensors 2.3.1 Cover Sensor Detects opening and closing of the top cover. Top Cover Cover Switch Fig. 2-35 2.3.2 Toner Empty Sensor Detects if there is toner in the toner cartridge. It also detects whether or not the drum unit is installed.

  • Page 46: Drum Unit

    Drum Unit 2.4.1 Photosensitive Drum Generates the latent electrostatic image and develops the image on the drum surface. 2.4.2 Primary Charger Forms a uniform charge on the drum surface. Corona wire Generates the ion charge on the drum. Grid Spreads the ion charge evenly over the drum surface. 2.4.3 Development Roller Develops the latent electrostatic image on the drum surface by the addition of the toner.

  • Page 47: Exposure Stage

    2.5.2 Exposure Stage After the drum is positively charged, it is exposed to the light emitted from the laser unit. Laser Beam Drum Paper Laser beam f  lens Laser detector Polygon mirror Laser diode Motor Lens Fig. 2-38 The area exposed to the laser beam is the image to be printed. The surface potential of the exposed area is reduced, forming the electrostatic image to be printed.

  • Page 48: Developing

    2.5.3 Developing Developing causes the toner to be attracted to the electrostatic image on the drum so as to transform it into a visible image. The developer consists of a non-magnetic toner. The development roller is made of conductive rubber and the supply roller (which is also made of conductive sponge) rotate against each other.

  • Page 49: 2.5.5 Drum Cleaning Stage

    2.5.5 Drum Cleaning Stage In the image transfer stage, not all the toner on the photosensitive drum is transferred onto the paper but some remains on the drum. In the drum cleaning stage, the drum surface is cleaned by the cleaning roller, so that residual toner on the drum surface is removed and collected on the cleaning roller itself.

  • Page 50: Chapter Iii Disassembly And Reassembly

    CHAPTER III DISASSEMBLY AND REASSEMBLY SAFETY PRECAUTIONS To avoid creating secondary problems by mishandling, be careful to follow the following precautions during maintenance work. Always turn off the power switch and unplug the power cord from the power outlet before accessing any parts inside the printer. Be careful not to lose screws, washers, or other parts removed.

  • Page 51: Disassembly Flow

    DISASSEMBLY FLOW III-2...

  • Page 52: Disassembly Procedure

    DISASSEMBLY PROCEDURE Output Tray ASSY Open the output tray toward you. Press the hinges at the left and right sides of the output tray inwards to release the output tray from the main cover. Output Tray Output Tray Main Cover Fig.

  • Page 53: Top Cover

    Top Cover Open the top cover. Press the hinges at the left and right sides of the top cover inwards to release the top cover from the main cover. Note: It is recommended for easy removal to press the side of the top cover ( ) while pulling the side of the main cover ( Top Cover...

  • Page 54: Mp Sheet Feeder Assy

    MP Sheet Feeder ASSY Caution: When disassembling the MP sheet feeder ASSY, if you get the grease on your fingers, take care not to touch the separation pad or the paper pick-up roller, the grease spread to the paper and the drum unit. It might cause black spots to appear on the printed page. Push the left rib outwards and pull out the MP sheet feeder.

  • Page 55: Fixing Unit

    Fixing Unit Remove the two M4x16 tapping screws. Lifting the fixing unit, disconnect the thermistor connector on the EL PCB first, then the two heater harnesses. Taptite, cup M4x16 Fixing Unit Taptite, cup M4x16 EL PCB Thermistor harness Heater harness (Brown) Heater harness Thermistor connector (Blue)
  • Page 56 The heat roller itself is very similar to the one for HL-1060/1070 printers. The heat roller for the HL-820/1020/1040/1050 printers can be distinguished by the groove on the edge of the roller. (Refer to the above figure.)

  • Page 57: Scanner Unit

    When replacing the heat roller cleaner with a new one, attach the cleaner referring to the figure below; -1mm ~ +1mm 4mm ~ 5mm Fig. 3-10 Follow the instructions below when installing the thermistor in the fixing unit. i) Place the cleaner felt of the cleaner ASSY for the thermistor under the heat roller. ii) Place the end of the thermistor on the heat roller.
  • Page 58 Note: When replacing the scanner unit, ensure to assemble the ferrite core using the cable binder as follows; Ferrite Core Cable binder Flat cable LD harness Fig. 3-13 Disconnect the three connectors from the panel sensor PCB. Remove the M3x8 tapping screw, and lift the toner sensor PCB from the scanner unit.

  • Page 59: Main Pcb Assy

    Main PCB ASSY Remove the three M4x6 screws. Hold the hooks at the left and right of the mounting frame to pull out the main PCB ASSY. Screw, pan M4x6 Hook Main PCB ASSY Screw, pan M4x6 Hook Fig. 3-15 Base Plate ASSY Caution: Prior to turning the printer upside-down, ensure that the drum unit has been removed...

  • Page 60: Panel Sensor Pcb Assy

    Lift the base plate ASSY and remove the grounding screw. Base Plate ASSY Ground wire Screw pan(washer), M3.5x6 Low-voltage Power Supply PCB ASSY Fig. 3-17 3.10 Panel Sensor PCB ASSY Remove the main shield. Remove the M4x12 screw securing the panel sensor PCB ASSY. Main shield Taptite, bind M4x12 Main shield...

  • Page 61: Low-Voltage Power Supply Pcb Assy

    Disconnect the eight connectors from the PCB. (Three connectors have already been disconnected when removing the scanner unit.) Panel Sensor PCB ASSY (Name of the Harnesses) 1. Low-voltage harness 2. Erase lamp harness 3. Toner harness 4. Scan motor flat cable 5.

  • Page 62: High-Voltage Power Supply Pcb Assy

    Remove the one M4x12 screw to remove the inlet holder. Then, remove the inlet and the PCB. Note: When re-assembling the inlet holder and AC inlet, be sure to insert the part A of the holder into the hole of the ferrite core. Inlet Holder AC Inlet Main Cover...

  • Page 63: Sub Fan Motor Assy

    3.13 Sub Fan Motor ASSY Slide the sub fan motor ASSY upwards. Sub Fan Motor Manufacturer sticker side Main Cover Fig. 3-23 Note: When re-assembling the sub fan motor, ensure that the side on which the manufacturers sticker is attached is facing the main frame. 3.14 Main Fan Motor ASSY Remove the two M4x12 screws securing the fan motor holder.

  • Page 64: Drive Unit

    PR980109 Fan motor holder Note: When re-assembling the fan motor into the holder, refer to the figure on the right. Fan Motor Fig. 3-25 3.15 Drive Unit Unhook the heater harness from the drive unit. Heater harness Drive Unit Ferrite Core (HL-1050 only) Ferrite Core (HL-1050, 200V only)

  • Page 65: Main Motor Assy

    Note: When re-assembling the drive unit, ensure that you fit the drive unit underneath the electrode DRB1. When disassembling the drive unit, be sure to remove the eight ferrite cores of two types on the heater harness and the motor harness. (Refer to the figures in the previous page, Fig.

  • Page 66: Paper Support

    3.18 Paper Support Pull the paper support down toward you and pull both legs outwards to release it. MP Sheet Feeder Paper Support Fig. 3-30 3.19 Extension Support Wire Raise the extension support wire toward you and press both legs inward to release Output Tray Extension Support Wire Fig.

  • Page 67: Packing

    PACKING Documents Accessory carton Printer Carton Fig. 3-32 III-18...

  • Page 68: Chapter Iv Maintenance And Troubleshooting

    CHAPTER IV MAINTENANCE AND TROUBLESHOOTING INTRODUCTION Initial Check Operating environment Check if : • The source voltage stays within ±10% from the rated voltage shown on the rating plate. • The printer is installed on a solid, level surface. • The room temperature is maintained between 10°C and 32.5°C. The relative humidity is maintained between 20% and 80%.

  • Page 69: Basic Procedure

    • Condensation on the corona unit may cause corona charge leakage. • Condensation on the hopper gate and separation pad may cause paper feed troubles. If condensation has occurred, wipe the effected units or parts with a dry cloth. If the drum unit is unpacked soon after it is moved from a cold room to a warm room, condensation may occur inside the unit, which may cause incorrect images.

  • Page 70: Consumable Parts

    CONSUMABLE PARTS Drum Unit The Drum lamp is on when the drum unit is nearly at the end of its life. Life expectancy: 20,000 pages at 20 pages per job 8,000 pages at 1 page per job Note: There are many factors that determine the actual drum life, such as temperature, humidity, type of paper and toner that you use, the number of pages per print job, etc..

  • Page 71: Image Defects

    IMAGE DEFECTS Image Defect Examples I-1 Light I-2 Dark I-2 Dark I-3 Completely blank I-4 All black I-5 Dirt on back of paper I-6 Black vertical I-6 Black vertical I-7 Black horizontal streaks streaks stripes I-10 Faulty I-8 Black vertical I-9 White vertical I-11 Poor fixing registration...

  • Page 72: Troubleshooting Image Defects

    Troubleshooting Image Defects The following procedures should be followed in the event of specific image defects. See subsection 3.3 for information about the location of the high-voltage contacts and grounding contacts. Caution: Print quality can not be guaranteed in the following cases; When using the printer for a special job, such as printing of name cards.
  • Page 73 Dark HV.GND Possible cause Step Check Result Remedy contacts (Fig.4-5) Corona failure Is the corona wire dirty? Clean the corona wire (soiled wire) by using the wire cleaner. Corona failure Are the corona electrodes Clean both electrodes. (contact failure) between the printer body and drum unit dirty? Drum unit failure Is the problem solved when the...
  • Page 74 Completely blank HV.GND Possible cause Step Check Result Remedy contacts (Fig.4-5) Developing bias Are the developing bias Clean the electrodes contact failure contacts between the printer at both sides. body and drum unit dirty? Drum unit Are the drum shaft and drum Clean the shaft and electrode of the printer body the electrode.
  • Page 75 All black HV.GND Possible cause Step Check Result Remedy contacts (Fig.4-5) Corona failure Is the corona wire of the drum Replace the drum unit broken? unit. Are the electric terminal Clean the terminals springs in the printer body and in the printer and on the electrode on the bottom the drum.
  • Page 76 Dirt on the back of paper Possible cause Step Check Result Remedy Fixing unit Is the pressure roller dirty? Clean the pressure roller. Is any other area in the printer (See the following note.) dirty? Dirt in the drum Is the transfer roller dirty? Replace the drum unit unit Is the problem solved after the...
  • Page 77 Black and blurred vertical streaks HV.GND Possible cause Step Check Result Remedy contacts (Fig.4-5) Corona failure Is the corona wire dirty? Clean the corona wire with the wire cleaner. Corona failure Is the vertical block streak Return the wire about 10mm wide? cleaner to its home Is the corona wire cleaner not position.
  • Page 78 Black vertical streaks (in a gray background) Possible cause Step Check Result Remedy Translucent Are there any stains on the Clean the scanner window. stain on the scanner window? If it is not effective, replace the scanner window scanner unit. White vertical streaks Possible cause Step...
  • Page 79 I-11 Poor fixing Possible cause Step Check Result Remedy Printing paper Is thick paper more than 42lb Instruct the user to use paper weight in use? of the recommended weight and thickness. Toner sensing Is the problem solved by Toner is empty. failure replacing the drum unit or the The toner sensing is defective,...
  • Page 80 I-13 Faint print Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o...
  • Page 81 I-15 Black spots Possible cause Step Check Result Remedy Drum unit Are the spots at 94mm If toner remains stuck, wipe it intervals? off gently with a cotton swab. The problem is not solved after Replace the drum unit if the printing a few pages.
  • Page 82 (3) Wipe the surface of the photosensitive drum with a cotton swab until the dust or paper powder on the surface comes off. Paper path Separator Cleaning roller Toner cartridge Photo sensitive drum Fig. 4-4 Caution: Do not wipe the surface of the photosensitive drum with something sharp. (ball-point pen etc.) Use the cleaning liquid which is a 50-50 mixture of ethyl alcohol and pure water.
  • Page 83 I-17 Gray background Note: This problem may appear on the first 10 to 20 pages immediately after replacing the toner cartridge. Possible cause Step Check Result Remedy Print paper Does the paper being used Recommend to change the meet the paper specification paper to a specified type of the (weight, etc.).
  • Page 84 I-19 Downward fogging of solid black Possible cause Step Check Result Remedy Drum unit Is the problem solved after Replace the drum unit. replacing the drum unit? High-voltage Is the problem solved after Replace the high-voltage power supply replacing the high-voltage power supply PCB.
  • Page 85 I-21 Light rain Remedy Possible cause Step Check Result Drum unit failure Is the problem solved after Replace the drum unit. replacing the drum unit with one that does not contain a starter sheet**? High-voltage Is the problem solved after Replace the high-voltage power supply replacing the high-voltage...

  • Page 86: Location Of High-Voltage Contacts And Grounding Contacts

    Location of High-voltage Contacts and Grounding Contacts Grounding contacts High-voltage contacts Grounding wire Drum shaft For transfer roller Drum unit For cleaning For development roller roller Wire cleaner For supply roller For grid For corona wire Fig. 4-5 For supply roller For development roller For corona wire...

  • Page 87: Location Of Feed Roller Shaft And Grounding Contacts

    Location of Feed Roller Shaft and Grounding Contacts Feed shaft roller For feed roller Fig. 4-7 IV-20...

  • Page 88: Paper Jam

    PAPER JAM Problem Type of jam Cause Temp measure Jam at power on Paper stuck Paper feed sensor or Remove the paper inside paper eject sensor is the printer. If there is no turned on. paper, check the suspect sensors referring to note and clear the problem.

  • Page 89: Troubleshooting Malfunctions

    TROUBLESHOOTING MALFUNCTIONS When carrying out countermeasures for malfunctions as described in this section, check connectors for contact failure before measuring the voltage at the specified connector pins. No AC power supplied Possible cause Step Check Result Remedy Supply voltage Is the correct voltage present Inform the user that the correct at the outlet? voltage is not supplied at the...
  • Page 90 Main motor unrotated Possible cause Step Check Result Remedy Failure of Is the connection of connector Reconnect the connector. connector P9 on the panel sensor PCB correct? Main motor (M1) Disconnect connector P9 from Replace the main motor. the panel sensor PCB. Measure the resistance between the connector pins of the main motor by using a...
  • Page 91 Insufficient output from high-voltage power supply unit Possible cause Step Check Result Remedy High-voltage Do any of the terminals on the Clean the high-voltage contact. contact high-voltage contacts have dirt or contact burns? High-voltage Check the connections of the Replace the high-voltage power supply harness between the high- power supply PCB.
  • Page 92 Scanner failure Possible cause Step Check Result Remedy Harness Is the connection of the Reconnect the connectors connection scanner motor connector P5 securely. failure on the panel sensor PCB secured? Power supply Is the voltage between pins 1 Check if +24VDC is supplied input (+24VDC) and 2 (GND) of between pins 1 (+24VDC) and...
  • Page 93 Double feeding Possible cause Step Check Result Remedy Paper Is paper of a recommended Instruct the user to use type being used? recommended types of paper. Separation pad Is the surface of the separation Replace the MP sheet feeder. pad worn out? Wrinkles Possible cause Step...

  • Page 94: Inspection Mode

    INSPECTION MODE Incorporated Inspection Modes The printer incorporates various inspection modes such as the factory inspection mode and the test print mode. The inspection mode varies depending on the model of the printer. This printer supports a factory inspection mode, continuous grid pattern print mode, 3 patterns print mode and NV-RAM value dump mode.
  • Page 95 Drum Paper eject sensor Alarm Registration sensor Ready Cover sensor (Paper) Data Toner sensor (Toner) Switch Fig. 4.8 Paper eject ON (Paper is detected.) Drum lamp ON sensor OFF (No paper is detected.) Drum lamp OFF Registration ON (Paper is detected.) Alarm lamp ON sensor OFF (No paper is detected.)

  • Page 96: Error Codes

    Error Codes In the event of a printer failure, error codes will be indicated as shown below. All the lamps and the specific lamps are turned ON alternately. The specific combination of lamps that are ON indicates the type of the error. Type of error Data Ready...

  • Page 97: Serial No. Descriptions

    6 3 3 1. 0 2 8 E 0 5. FILLING AMOUNT : 0=100g : 1=110g TONER TYPE: FILLING DATE FILLING MONTH Scanner unit ....on the scanner unit 2 8 0 0 1 SERIAL NO. ID NO. 1:HL-700 SERIES, 8: HL-820/1020/1040/1050, 9:HL-1060 FACTORY ID NO.

  • Page 98: Connection Diagram, Hl-820/1020

    Appendix 2. Connection Diagram, HL-820/1020 AC INPUT INLET P1 CDCC I/F LVPS POWER MAIN PCB MAIN MOTOR P2 ENGINE I/F SOLENOID P1 ENGINE MOTOR REGISTRATION SENSOR (60x60mm) FAN1 TONER SENSOR SCANNER MOTOR SCANNER UNIT (80x80mm) FAN2 COVER SW ERASE LAMP PANEL SENSOR SR.B...

  • Page 99: Connection Diagram, Hl-1040

    Appendix 3. Connection Diagram, HL-1040 AC INPUT SERIAL I/F INLET RS-100M P1 CDCC I/F LVPS POWER MAIN PCB MAIN MOTOR P2 ENGINE I/F SOLENOID MOTOR P1 ENGINE REGISTRATION SENSOR (60x60mm) FAN1 TONER SENSOR SCANNER MOTOR SCANNER UNIT (80x80mm) FAN2 COVER SW ERASE LAMP PANEL SENSOR SR.B...

  • Page 100: Connection Diagram, Hl-1050

    Appendix 4. Connection Diagram, HL-1050 AC INPUT SERIAL I/F INLET RS-100M P1 CDCC I/F USB I/F LVPS POWER MAIN PCB MAIN MOTOR P2 ENGINE I/F SOLENOID P1 ENGINE MOTOR REGISTRATION SENSOR (60x60mm) FAN1 TONER SENSOR SCANNER MOTOR SCANNER UNIT (80x80mm) FAN2 COVER SW ERASE LAMP...

  • Page 101: Main Pcb Circuit Diagram, (Hl-820/1020/1040), (1/2

    Appendix 5. Main PCB Circuit Diagram, (HL-820/1020/1040), (1/2) CODE UK4007000 NAME B48K312CIR V - 5...

  • Page 102: Main Pcb Circuit Diagram, (Hl-820/1020/1040), (2/2)

    Appendix 6. Main PCB Circuit Diagram, (HL-820/1020/1040), (2/2) CODE UK4007000 B48K312CIR NAME A - 6...

  • Page 103: Main Pcb Circuit Diagram, (Hl-1050), (1/5

    Appendix 7. Main PCB Circuit Diagram, (HL-1050), (1/5) CODE UK4041000 NAME B512001CIR A - 7...

  • Page 104: Main Pcb Circuit Diagram, (Hl-1050), (2/5)

    Appendix 8. Main PCB Circuit Diagram, (HL-1050), (2/5) CODE UK4041000 NAME B512001CIR A - 8...

  • Page 105: Main Pcb Circuit Diagram, (Hl-1050), (3/5)

    Appendix 9. Main PCB Circuit Diagram, (HL-1050), (3/5) CODE UK4041000 NAME B512001CIR A - 9...

  • Page 106: Main Pcb Circuit Diagram, (Hl-1050), (4/5)

    Appendix 10. Main PCB Circuit Diagram, (HL-1050), (4/5) CODE UK4041000 NAME B512001CIR A - 10...

  • Page 107: Main Pcb Circuit Diagram, (Hl-1050), (5/5)

    Appendix 11. Main PCB Circuit Diagram, (HL-1050), (5/5) CODE UK4041000 NAME B512001CIR A - 11...

  • Page 108: Panel Sensor Pcb Circuit Diagram

    Appendix 12. Panel Sensor PCB Circuit Diagram CODE UK4010000 NAME B48K303CIR A - 12...

  • Page 109: Low-Voltage Power Supply Pcb Circuit Diagram, Hl-820/1020/1040 (110 - 120V

    Appendix 13. Low-voltage Power Supply PCB Circuit Diagram, HL-820/1020/1040 (110 - 120V) NTC1 BEA1 R101 D110 D104 R102 R103 C101 VR101 R104 R105 C102 C103 R115 R113 R114 R110 Low-voltage NAME PS Circuit (110 - 120V) A - 13...

  • Page 110: Low-Voltage Power Supply Pcb Circuit Diagram, Hl-820/1020/1040 (220 - 240V

    Appendix 14. Low-voltage Power Supply PCB Circuit Diagram, HL-820/1020/1040 (220 - 240V) NTC1 BEA1 D104 R101 C101 D110 R102 C102 R103 VR101 R104 R105 C103 R115 R113 R114 R110 Low-voltage NAME PS Circuit (220 - 240V) A - 14...

  • Page 111: Low-Voltage Power Supply Pcb Circuit Diagram, Hl-1050 (110 - 120V

    Appendix 15. Low-voltage Power Supply PCB Circuit Diagram, HL-1050 (110 - 120V) NTC1 BEA1 R101 D110 R102 D104 R103 C101 VR101 R104 R105 C102 C103 R115 R113 R114 R110 R116 R117 Low-voltage NAME PS Circuit (110 - 120V) A - 15...

  • Page 112: Low-Voltage Power Supply Pcb Circuit Diagram, Hl-1050 (220 - 240V

    Appendix 16. Low-voltage Power Supply PCB Circuit Diagram, HL-1050 (220 - 240V) NTC1 BEA1 D104 R101 D110 C101 R102 C102 R103 VR101 R104 R105 C103 R115 R113 R114 R110 R116 R117 Low-voltage NAME PS Circuit (220 - 240V) A - 16...

  • Page 113: High-Voltage Power Supply Pcb Circuit Diagram

    Appendix 17. High-voltage Power Supply PCB Circuit Diagram R103 R102 R122 R121 R101 Q122 D121 R123 R105 VR101 R104 R125 R124 C101 R106 C122 C102 VR61 D122 R107 R131 C123 D102 D124 PC21 D127 PC22 C103 R43 VR23 VR22 VR71 R74 R73 VR21 C124...

  • Page 114: How To Know Drum Unit Life & Page Counter

    HOW TO KNOW DRUM UNIT LIFE & PAGE COUNTER If you want to know the drum unit life or the number of printed pages, you should print out the test print page (for HL-820/1020) or the print configuration page(s) (HL- 1040/1050).
  • Page 115 PR98092 How to Read the Drum Life The bar shown below is printed at the bottom of Test Print / Print Configuration. It initially indicates 100% and gradually decreases. It indicates 0% when the Drum lamp is on. It stays at 0% even if further printing is done. Drum Life 100% 00000030303030202...

  • Page 116: Diameter / Circumference Of Rollers

    APPENDIX 19. DIAMETER / CIRCUMFERENCE OF ROLLERS The diameter and circumference of each roller are listed below; Parts Name Diameter (Circumference) Paper Feed Roller 11.97 mm (37.6 mm) Transfer Roller 16.90 mm (53.1 mm) OPC Drum 29.97 mm (94.1 mm) Heat Roller 19.86 mm (62.4 mm) Pressure Roller...

This manual is also suitable for:

Hl-1040Hl-1050Hl-1020

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