Brother International HL-720 Service Manual

Brother International HL-720 - B/W Laser Printer Manual

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  • Brother International HL-720 | Service Manual - Page 1
    R LASER PRINTER SERVICE MANUAL MODEL:HL-720/730/730Plus
  • Brother International HL-720 | Service Manual - Page 2
    is a registered trademark and HP Laser Jet II, IIP, and IID are trademarks of HewlettPackard Company. IBM,IBM PC and Proprinter are registered trademarks of International Business Machines Corporation. Microsoft and MS-DOS are registered trademarks of Microsoft Corporation. Windows is a registered
  • Brother International HL-720 | Service Manual - Page 3
    required for after-sales service of the laser printer (here-after referred to as "this machine" or "the printer"). This information is vital to the service technical in maintaining the high print quality and performance of the printer. This service manual covers both HL-720 and HL-730/730Plus. This
  • Brother International HL-720 | Service Manual - Page 4
    ...I-8 4. SAFETY INFORMATION I-10 4.1 Laser Safety (110 - 120V Model only 15 1.3.6 Optional Serial I/O ...II-16 1.3.7 EEPROM ...II-16 1.3.8 Reset Circuit...II-17 1.3.9 CDCC I/O ...II-18 1.3.10 Engine I/O -27 2.3.2 Toner Empty Sensor ...II-27 2.4 Drum Unit...II-28 2.4.1 Photosensitive Drum ...II-28
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    Defect Examples...IV-3 2.2 Troubleshooting Image Defects IV-4 3. TROUBLESHOOTING OF MALFUNCTIONS IV-12 4. INSPECTION MODE...IV-17 4.1 Incorporated Inspection Modes IV-17 4.2 Error codes ...IV-19 APPENDICES ...V-1 1. Connection Diagram, HL-720 V-1 2. Connection Diagram, HL-730/730Plus V-2 3a
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    7. Low-Voltage Power Supply PCB Circuit Diagram 230V V-8 8. Low-Voltage Power Supply PCB Circuit Diagram 115V V-9 9. High-Voltage Power Supply PCB Circuit Diagram V-10 10. Serial No. Descriptions ...V-11 iii
  • Brother International HL-720 | Service Manual - Page 7
    600 dots per inch (dpi) with microfine toner and six pages per minute (ppm) printing speed (A4 or Letter size paper). User-Friendly Operation for Windows The dedicated printer driver and TrueType™-compatible fonts for Microsoft® Windows 3.1 and Windows 95 are available on the floppy disk supplied
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    The time-out for auto sleep mode can be set through the Windows printer driver. Low Running Cost Since the toner cartridge is separate from the Drum Unit, you need to replace only the toner cartridge after around 2,200 pages printed, which is cost effective and ecologically friendly. Enhanced Memory
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    mode. The time-out for auto sleep mode can be set through the Windows printer driver. Low Running Cost Since the toner cartridge is separate from the Drum Unit, you need to replace only the toner cartridge after around 2,200 pages printed, which is cost effective and ecologically friendly. Remote
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    sheet feeder) Toner in a cartridge Life Expectancy: 2,200 pages/cartridge (when printing A4 or lettersize paper at 5% print coverage) Drum unit, separated from toner cartridge Electrophotography by semiconductor laser beam scanning 600 dots/inch (under Brother Printing Solution for Windows) 300 dots
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    3.2 Functions CPU Emulation Printer driver Interface Memory Control panel Diagnostics CPU Emulation Printer driver Interface Memory Control panel Diagnostics Z80 12.5 MHZ Windows 3.1 GDI WindowsTM 3.1/3.11 and Windows 95 driver, supporting Brother Native Compression mode
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    3.3 Electrical and Mechanical Power source U.S.A. and Canada: AC 110 to 120V, 50/ and the Multi-purpose sheet feeder is removed.) Weight Approx. 6.5 kg (14.3 lb.) including the drum unit Power source U.S.A. and Canada: AC 110 to 120 V, 50/60Hz Europe and Australia:
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    the top edge of the sheets, then push the tray back to its original position. (2) Manual paper loading The manual paper loading takes priority of feeding and a single sheet of paper can be fedinto the printer. The applicable sizes and types of paper are the same as the multi-purpose tray loading
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    conditions Types Normal paper (cut sheet) Special paper (cut sheet) Name 60 to 157 g/m2 paper Labels Envelopes Postcards Organizers Tray feed Manual feed 3.7 Effective Printing Area Printable area E F A C E BD F The effective printing area means the area within which the printing of all the
  • Brother International HL-720 | Service Manual - Page 15
    The table below shows the effective printing areas. Size A 4 Letter Legal B 5 (JIS) B 5 (ISO) Executive A 5 Organizer (J size) Organizer (K size) Organizer (L size) COM-10 MONARCH C 5 DL A 210.0mm 8.27" (2,480 dots) 215.9mm 8.5" (2,550 dots) 215.9mm 8.5" (2,550 dots) 182.0mm 7.16" (2,149 dots) 176
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    . The label shown below indicates compliance with the CDRH regulations and must be attached to laser products marketed in the United States. The label for Japanese products MANUFACTURED : K BROTHER INDUSTRIES, LTD. 15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467, Japan. This product complies with FDA
  • Brother International HL-720 | Service Manual - Page 17
    of VBG 93 and the performance instructions for VBG 93 are valid. (2) CAUTION: In case of any trouble with the laser unit, please replace the laser unit itself. To prevent direct exposure to the laser beam, do not try to open the enclosure of laser unit. (3) Location of the Exit Opening of
  • Brother International HL-720 | Service Manual - Page 18
    Fig. 2.1 shows a general block diagram of this printer. Laser scanner unit Drum unit Transfer block Drive block (Stepping motor) Paper tray unit Paper tray Manual feed Developing block Drum Charging block Cleaner block Toner cartridge Image generation system Fig. 2.1 Fixing unit
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    block (Operation panel) Erase lamp Laser scanner unit Drum unit Transfer block Drive block (Stepping motor) Paper tray unit Paper tray Manual feed Developing block Drum Charging block Cleaner block Toner cartridge Image generation system Fig. 2.2 Fixing unit Paper eject block Paper feed
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    1.2 Main PCB Block Diagram Fig. 2.3 shows a block diagram of the main PCB. ASIC Reset Circuit CPU Core (Z80) BUS INT DRAM 0.5 Mbytes Option RAM 1.5 Mbytes or 3.5 Mbytes DRAM Control EEPROM (128 x 8 bits) Motor Driver To Panel sensor PCB Fig. 2.3 II-3 Oscillator (12.27 MHz) Program
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    Fig. 2.4 shows a block diagram of the main PCB. Reset Circuit CPU Core (MC68EC000) BUS INT Program + Font ROM 512 Kbytes RAM (0.5 Mbytes) Option RAM (1M or 1.5Mbytes) Option Serial I/O (RS232C & RS422A) EEPROM (128 8 bits) Motor Driver To Panel Sensor PCB Fig. 2.4 A S I C
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    1.3 Main PCB 1.3.1 CPU Core Fig. 2.5 shows the ASIC circuit block on the main PCB. The CPU core is a Z80 which is driven with access directly only the program ROM and the working S-RAM, and the DRAM through the DRAM control unit. NOTE: The ASIC has the functions above. Fig. 2.5 II-5
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    Fig. 2.6. shows the CPU circuit block on the main PCB. The CPU is a Motorola MC68EC000FN16 which is driven with a clock frequency of 15.3
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    1.3.2 ASIC The ASIC is composed of Cell Based IC and has the following frequency into two. It is also equipped with the several clocks for timer unit, engine control I/O unit, CDCC parallel I/O unit, data extension unit and FIFO. (2) Program ROM The program ROM of 16 Kbytes is contained
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    . BUSY goes LOW at the rising edge of ACK. This supports the IEEE1284 data transfer with the following mode. Nibble mode Byte for one raster is transferred from DRAM to the FIFO through the data extension unit and exported as the serial video data. The data cycle is 6.13 MHz. (
  • Brother International HL-720 | Service Manual - Page 26
    (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, scanner, etc. II-9
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    The ASIC is composed of Cell Based IC and has the following function blocks. (1) Oscillator circuit Generates the main clock for the CPU
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    I/O There are two modes in this unit. One is the CPU receiving mode and the other is speed MODE as shown above. BUSY goes LOW at the rising edge of ACK. This supports the IEEE1284 data transfer with the following mode. Nibble mode Byte mode (8) Data extension This
  • Brother International HL-720 | Service Manual - Page 29
    (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. 2.8 II-12
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    1.3.3 ROM A program of 512 Kbytes and the font data are stored in the ROM. A 42-pin IC socket is a 4 Mbits ROM (40-pin) must be mounted to leave the 1st and 42nd pins of the socket opened. Fig. 2.9 1.3.4 DRAM A 4M-bit DRAM (x8 bits) is used as the RAM. Fig. 2.10 II-13
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    A 4M-bit DRAM (x 16bits) is used as the RAM. Only one DRAM is installed in the 0.5 Mbyte model. Fig. 2.11 II-14
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    1.3.5 Optional RAM Three 4M-bit DRAM (x 8 bits) and one 16M-bit DRAM (x 8 bits) are used as the optional RAM. The total memory area is expanded up to 4 Mbytes. Fig. 2.12 There are two types of optional RAMs: the 1 Mbyte model and the 1.5 Mbytes model for HL-730, and one
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    is provided for this I/O, which are read and written to by the CPU. Fig. 2.14 1.3.7 EEPROM The EEPROM is XL24C01AF type of a two-wire method with a 128 x 8 bits configuration. Fig. 2.15 The EEPROM is XL24C01AF type of a two-wire method with a 128 x 8 bits configuration. Fig
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    1.3.8 Reset Circuit The reset IC is PST591DMT. The reset voltage is 4.2V (typ.) and the LOW period of reset is 50 ms (typ.). Fig. 2.17 The reset IC is PST593DMT. The reset voltage is 4.2V (typ.) and the LOW period of reset is 200 ms (typ). Fig. 2.18 II-17
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    1.3.9 CDCC I/O Fig. 2.19 shows the CDCC interface circuit. Fig. 2.19 Fig. 2.20 shows the CDCC interface circuit. Fig. 2.20 II-18
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    1.3.10 Engine I/O Fig. 2.21 shows the engine interface circuit. Fig. 2.21 II-19
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    Fig. 2.22 shows the engine interface circuit. Fig. 2.22 II-20
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    1.3.11 Paper Feed Motor Drive Circuit The motor driver consists of a TR array. The excitation method is 2-2 phase excitation with an bipolar drive. Fig. 2.23 The motor driver is a TR array, The excitation method is 2-2 phase excitation with an bipolar drive. Fig. 2.24 II-21
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    1.4 Panel Sensor PCB The following parts are on the panel sensor. • Operation Panel .......1Key, 4LEDs • Connector Low-voltage, high-voltage, solenoid, main motor, toner sensor, laser, polygon motor, connector for main PCB • Registration sensor II-22
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    1.5 Power Supply The power supply uses the switching regulation system to generate the regulated DC power (+5V and +24V), which are converted from the AC line. (Heater) Fuse Lightning Surge Absorber Heater Circuit Thermal Fuse Lamp Feedback Line Filter Rectifier Oscillator 24V Regulation
  • Brother International HL-720 | Service Manual - Page 41
    mechanism Papers Multi-Purpose Sheet Feeder Manual Paper Pass Paper Supply Unit Hopper Plate Registration Sensor Lever Toner Cartridge Paper Pick-up Roller Drum Unit Paper Feed Roller Pitch Roller Auger Blade Photosensitive Drum Transfer Roller Fuser Unit Erase Lamp Pressure Roller Eject
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    and is transported to the transfer roller. Paper Pinch roller Transfer roller Paper feed gear Idle gear Paper feed roller Paper feed roller Drum Clutch mechanism (engaged/released by the solenoid assembly) Released when the solenoid is ON and engaged when the solenoid is OFF. Fig. 2.28
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    edge of the paper push down the eject sensor actuator located in the fixing unit, the photo sensor (photo interrupter) is opened and detects the start of paper Transfer roller Pressure roller Eject sensor actuator Eject roller Drum Heat roller Sensor Paper High-voltage power supply PCB , Eject
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    2.3 Sensors 2.3.1 Cover Sensor Detects open or close of the top cover. 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. (The toner cartridge is installed in the drum unit). Top Cover Fig. 2.30 Cover Switch II-27
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    2.4 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. (1) Corona wire Generates ion on the drum. (2) Grid Spreads the ion evenly over the drum. 2.4.3 Developer
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    is positively charged, it is exposed to the light emitted from the laser unit. Drum Paper Laser Beam Laser detector Laser diode Laser beam f lens Polygon mirror Motor Lens Fig. 2.32 The exposed area is the part to be printed. The surface potential of the exposed area is
  • Brother International HL-720 | Service Manual - Page 47
    is transferred onto the paper, applying the negative charge from the backside of the paper. The negative charge to the paper causes the positive charged toner to leave the drum, and adhere to the paper. As a result, the image is visible on the paper. (b) Cleaning process of transfer roller If the
  • Brother International HL-720 | Service Manual - Page 48
    In the image transfer stage, not all the toner on the photosensitive drum is transferred onto the paper but some of them remain 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 away and collected in the
  • Brother International HL-720 | Service Manual - Page 49
    To prevent the creation of secondary problems by mishandling, be careful about the following precautions during maintenance work. (1) Always turn off the power switch and unplug the power cord from the power outlet before accessing any parts inside the printer. (2) Be careful not to lose screws
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    1 DRUM UNIT B 2 TOP COVER 3 MP PAPER TRAY ASSY 4 FIXING UNIT C 5 SCANNER UNIT A 15 TRAY EXTENSION 16 PAPER EJECT TRAY ASSY A BOTTOM 6 MAIN PCB ASSY B 7 BASE PLATE ASSY 8 PANEL SENSOR PCB ASSY 9 LOW-VOLTAGE PS PCB ASSY C 12 DRIVE UNIT 13 MAIN MOTOR ASSY and MOTOR HEAT
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    3.1 Drum Unit (1) Open the top cover. (2) Lift out the drum unit. Fig. 3.1 3.2 Top Cover (1) Open the top cover to the first lock position. (2) Prize up the top cover link and free it from the dowel on the top cover to release it inward. (3) Press the link downward. Fig. 3.2
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    (4) Open the top cover further, release the catch of the both side by sliding the top cover backward. Fig. 3.3 3.3 Multi-purpose Paper Tray Assy (1) Tilt the left outward and pull out the MP tray. It is not necessary to tilt the right rib. , Fig. 3.4 NOTE: When reassembling, apply a suitable amount
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    Fixing Unit (1) Remove the M4x12 screw securing the fixing unit. (2) Lifting up the fixing unit, disconnect the two heater harnesses and remove the connector of thermistor on EL PCB. Fig. 3.5 (3) Remove the two M3x10 screws. (4) Open the fixing unit cover along the open side of the fixing unit cover
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    (5) Release the right side of the paper eject roller shaft. (6) Remove the four eject pinch rollers and the pinch springs from the fixing unit frame. Then, remove the pinch spring from each pinch roller. Fig. 3.5b (7) Remove the M3x10 screw securing the electrode plate to remove the electrode plate
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    the panel sensor PCB. (4) Remove the screw and disassemble the Toner sensor PCB from the Scanner unit. Fig. 3.6 NOTE: Never touch the inside of the scanner unit or the mirror when disassembling or reassembling. If there is any garbage or dust on the mirror, blow it off. 3.6 Main PCB Assy (1) Remove
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    3.7 Base Plate Assy NOTE Prior to turning the printer upside-down, drum unit should be removed from the printer. (1) Turn the printer upside down. (2) Remove the four M4 and four M3 tapping The three connectors have already disconnected at the disassembling scanner unit. See page, III-5 ). Fig. 3.9
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    NOTE1:When reassembling, the connectors must be inserted to the PCB without floating and the PCB must not be floated by the harnesses. NOTE2:The connector should be inserted by fitting the housing color and the pin number. 3.9 Low-Voltage Power Supply PCB Assy (1) Remove the screw securing the low-
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    3.11 Fan Motor (1) Disconnect the connector from the high-voltage power supply PCB. ( It has been disconnected already. See above) (2) Take off the fan motor assy. Fig. 3.12 3.12 Drive Unit (1) Remove the four screws securing the drive unit. Fig. 3.13
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    3.13 Main Motor Assy and Motor Heat Sink (1) Remove the two screws securing the main motor assy. (2) Remove the two screws securing the motor heat sink. Fig. 3.14 3.14 Gears and Solenoid (1) Apply grease the point as shown below. Grease: MOLYKOTE EM-30L TKC-0 MOLYKOTE EM-D110 NOTE: Apply EM-30L to
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    3.15 Tray Extension (1) Put the tray extension assy down toward the front of the printer, and pull the bottom of its both side legs outward to release it. Fig. 3.16 3.16 Paper Eject Tray Assy (1) Open the paper eject tray. (2)
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    Fig. 3.18
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    or paper feed problems may occur, or prints may be blurred). 2) The print paper is damped. [If so, use fresh paper, and check whether the print quality improves or not.] (3) Consumables Check if : 1) The toner LED is not lit on the display when a toner cartridge is installed in the printer. [If the
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    room, condensation may occur inside the cartridge, which may cause incorrect image. Instruct the user to allow the cartridge to come to room temperature before unsealing mode described on the later pages of this section. If no error lamp is lit, see Section 4 for troubleshooting. (2) If any incorrect
  • Brother International HL-720 | Service Manual - Page 64
    2. IMAGE DEFECTS 2.1 Image Defect Examples I-1 Light I-2 Dark I-3 Completely blank I-4 All black I-5 Dirt back of paper I-6 Black vertical streaks I-6 Black and blurred vertical stripes I-7 Black and blurred horizontal stripes I-8 Dropout I-12 Image distortion Print out test print out test
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    2.2 Troubleshooting Image Defects Procedures to be followed in the event of specific image defects. I-1 Light Possible cause Scanner window Poor contrast Toner sensing failure (toner cartridge side) Toner sensing failure (printer side) Drum connection failure Transfer electrode contact failure
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    click position? Corona failure (soiled wire) Corona failure (contact failure) Drum unit failure 2 Is the corona wire soiled? 3 Are the corona electrodes between the printer body and drum unit soiled? 4 Is the problem solved when the drum unit is replaced? Result No Yes No Remedy Set it to the
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    performed with the interlocks defeated, is the specified voltage measured at the charging spring at the printer body side? Ditto 4 Perform the same check as in step 3. Result No Yes Remedy Replace the drum unit. Clean the charging wire at the both sides. Yes Check the connection of the harness
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    after replacing the drum unit? Result Yes Yes Remedy Replace the drum unit. Clean the toner off. Yes Return the wire cleaner or its home position. Yes Clean the corona wire. Yes Clean the scanner window with a soft dry cloth. Yes Replace the drum unit. Yes Replace the drum unit. Yes Replace the
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    horizontal streaks at 50 mm intervals? Result Yes Yes Yes Remedy Replace the drum unit. Print several sheets and see what happens. The problem will disappear after a while. Replace the fixing unit. I-8 Dropout Possible cause Transfer failure High-voltage power supply failure Step 1 2 Check Is
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    the laser scanner soiled? Is the transfer roller scratched? Result Yes Yes Remedy Clean the window with a dry tissue. Replace the drum unit. I-10 Faulty registration Possible cause Excessive paper load Step 1 Check Is the amount of paper loaded to the paper tray more than 22mm thick? Printer
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    Yes Yes No Remedy Instruct the user to use paper of the recommended thickness. Toner is empty. As toner sensing is defective, clean the toner sensor. If the wiper of the toner cartridge id broken, replace the toner cartridge with a new one. Connect the spring or replace the fixing unit. Replace the
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    Check Is the scanner unit secured to the frame normally? Is there any play? Is laser portion of the laser scanner motor defective? 3 cause Leaning of the printer Drum unit Step Check 1 Is the printer placed horizontally? 2 Is the problem happened just after replacing the drum unit with a new one
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    TROUBLESHOOTING OF MALFUNCTIONS Always turn off the power switch and unplug the power cord from the power outlet before accessing any parts inside the printer and the power plug? Result No No Yes Yes Remedy Inform the user that the correct voltage is not supplied at the outlet. Plug the power
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    circuit is activated, check the connector, the wiring from the connector, and the DC load. Power supply 3 input unit No Replace the power supply input unit after unplugging the power cord from the power outlet. M-3 Main motor unrotated Possible cause Connection failure of connector Main motor
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    on the panel sensor PCB good? 2 Set paper on the manual paper tray and press the test print button on the operation panel output from high-voltage power supply unit Possible cause High-voltage contact High-voltage the high-voltage power supply and the driver PCB is OK? Result Remedy Yes
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    between pins 1 (+24 VDC) and 3 (GND) of connector P4 on the panel sensor PCB. If not, check the power supply input. Yes Replace the scanner unit.
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    type used? 2 Is the wrinkle problem solved if a new paper is used? Fixing unit entrance guide Fixing unit 3 Is the entrance guide soiled? 4 Is the pressure roller soiled? Result No No Yes Yes Remedy Instruct the user to use the recommended types of paper. Instruct the user how to store paper so
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    print mode. The inspection mode varies with the model of the printer. HL-720: HL-730/730Plus: Factory inspection mode and Continuous test print mode Factory to the respective LEDs as shown below. HL-720: LED DRUM ALARM READY DATA Type of inspection Factory inspection mode Continuous test print mode
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    .) OFF (No toner cartridge is installed.) DRUM LED ON DRUM LED OFF ALARM LED ON ALARM LED OFF READY LED OFF READY LED ON DATA LED OFF DATA LED ON The procedure for the factory inspection mode is as follows. (1) Open the top cover and remove the drum unit. (2) Turn on the power of the printer while
  • Brother International HL-720 | Service Manual - Page 80
    of error Fuser malfunction Laser BD malfunction Scanner Malfunction ROM Error D-RAM Error Service A Service B Service C Service D Service E0 Service E1 Service P NV-RAM Error DATA READY ALARM DRUM v LED indicating the error Fuser Malfunction DRUM ALARM READY (PAPER) DATA (TONER) A lapse of time
  • Brother International HL-720 | Service Manual - Page 81
    Appendix 1. Connection Diagram, HL-720 AC INPUT MB -215/235 CDCC I/F LVPS POWER SWITCH CN1 CN101 P2 P1 EXRAM MAIN PCB ENGINE I/F P3 MAIN MOTOR M PANEL SENSOR PCB P8 P5 TONER SCANNER MOTOR P3 P1 REGIST P4 LASER T/R SOLENOID CLN GRID DEV P2 P7 P6 DRUM GROUND PCB P4 HVPS
  • Brother International HL-720 | Service Manual - Page 82
    MAIN PCB ENGINE I/F P3 MAIN MOTOR M PANEL SENSOR PCB P8 P5 TONER SCANNER MOTOR P3 P1 REGIST P4 LASER T/R SOLENOID CLN GRID DEV P2 P7 P6 DRUM GROUND PCB P4 HVPS LEDs FAN P2 P3 EJECT P1 SW COVER SW ERASE LAMP HEATER THERMISTOR V - 2 NAME Connection Diagram HL-730/730Plus
  • Brother International HL-720 | Service Manual - Page 83
    Appendix 3. a. Main PCB Circuit Diagram (1/2), HL-720 1 2 3 4 5 6 7 8 9 10 11 12 A A B B C C D D E E F F G G H H CODE UK3595000 NAME B48K224CIR 1 2 3 4 5 6 7 8 9 10 11 12 V - 3
  • Brother International HL-720 | Service Manual - Page 84
    Appendix 3. b. Main PCB Circuit Diagram (2/2), HL-720 1 2 3 4 5 6 7 8 9 10 11 12 A A B B C C D D E E F F G G H H CODE UK3595000 NAME B48K224CIR 1 2 3 4 5 6 7 8 9 10 11 12 V - 4
  • Brother International HL-720 | Service Manual - Page 85
    Appendix 4. Main PCB Circuit Diagram (1/2), HL-730/730Plus 1 2 3 4 5 6 7 8 9 10 11 12 A A B B C C D D E E F F G G H H CODE UK3596000 NAME B48K233CIR (1/2) 1 2 3 4 5 6 7 8 9 10 11 12 V - 5
  • Brother International HL-720 | Service Manual - Page 86
    Appendix 5. Main PCB Circuit Diagram (2/2), HL-730/730Plus 1 2 3 4 5 6 7 8 9 10 11 12 A A B B C C D D E E F F G G H H CODE UK3596000 NAME B48K233CIR (2/2) 1 2 3 4 5 6 7 8 9 10 11 12
  • Brother International HL-720 | Service Manual - Page 87
    Appendix 6. Panel/Sensor PCB Circuit Diagram, HL-720/730/730Plus TI No.96-P062 1 2 3 4 5 6 7 8 9 10 11 12 A A B B C C D D E E F F G G H H CODE UK3057000 NAME B48K225CIR 1 2 3 4 5 6 7 8 9 10 11 12 V - 7
  • Brother International HL-720 | Service Manual - Page 88
    Appendix 7. Low-Voltage Power Supply PCB Circuit Diagram (110 -120V), HL-720/ 730/730Plus N L SW1 F1 FG PC1 C15 Q2 R10 C7 BEA1 C8 R6 R5 C13 R8 R13 R11 C10 R9 D4 C11 D6 R17 D7
  • Brother International HL-720 | Service Manual - Page 89
    Appendix 8. Low-Voltage Power Supply PCB Circuit Diagram (220 -240V), HL-720/ 730/730Plus N L SW1 F1 FG PC1 C15 Q2 R10 C7 BEA1 C8 R6 R5 C13 R8 R13 R11 C10 R9 D4 C11 D6 R17 D7
  • Brother International HL-720 | Service Manual - Page 90
    Appendix 9. High-Voltage Power Supply PCB Circuit Diagram, HL-720/ 730/730Plus A B C D E F G H 1 1 2 2 3 3 P1 CN1 11 +24V R1 CN1 R4 6 CHAR CN1 12 0V CN1 7 DEVE R2 Q6 R3 C2 D2 R8 R6 R16 R9 R7
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    September K: October L: November M: December (1) Printer on the main body D 6 9 5 0 5 4 8 8 MONTH YEAR SERIAL NO. FACTORY ID NO. (2) Process unit on the package of the process unit (Drum unit with toner cartridge) 6D30 0 0 0 AN1 YEAR MONTH TONER TYPE DATE PRODUCED IN JAPAN = LINE NO
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    (5) Scanner unit on the scanner unit 1 1 0 0 1 SERIAL NO. ID NO. 1:HL-700 SERIES 9:HL-1060 FACTORY ID NO. V-1
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    R LASER PRINTER SERVICE MANUAL MODEL:HL-760
  • Brother International HL-720 | Service Manual - Page 94
    is a registered trademark and HP Laser Jet II, IIP, and IID are trademarks of HewlettPackard Company. IBM,IBM PC and Proprinter are registered trademarks of International Business Machines Corporation. Microsoft and MS-DOS are registered trademarks of Microsoft Corporation. Windows is a registered
  • Brother International HL-720 | Service Manual - Page 95
    , troubleshooting for malfunctions, etc. APPENDICES: Connection diagrams, PCB circuit diagrams. Note: This service manual ffor the HL-760 describes only the changesin each part of the HL720/730 (84U002BE0) service manual which was published previously. Parts in common with those in the HL-720/730
  • Brother International HL-720 | Service Manual - Page 96
    EEPROM ...II-10 1.3.8 Reset Circuit ...II-11 1.3.9 CDCC HL-730 (P.II-27) 2.3.1 Cover Sensor Refer to HL-730 (P.II-27) 2.3.2 Toner Empty Sensor Refer to HL-730 (P.II-27) 2.4 Drum Unit Refer to HL-730 (P.II-28) 2.4.1 Photosensitive Drum Refer to HL-730 (P.II-28) 2.4.2 Primary Charger Refer to HL
  • Brother International HL-720 | Service Manual - Page 97
    Refer to HL-730 (P.II-30) 2.5.5 Drum Cleaning Stage Refer to HL-730 (P.II-31) 2.5.6 Erasing Stage Refer to HL-730 (P.II-31) CHAPTER III DISASSEMBLY AND REASSEMBLY III-1 1. SAFETY PRECAUTIONS III-1 2. DISASSEMBLING FLOW III-2 3. DISASSEMBLING PROCEDURE III-3 3.1 Drum Unit...III-3 3.2 Top
  • Brother International HL-720 | Service Manual - Page 98
    PCB Circuit Diagram (1/3 V-2 3. Main PCB Circuit Diagram (2/3 V-3 4. Main PCB Circuit Diagram (3/3 V-4 5. Panel/Sensor PCB Circuit Diagram Refer to HL-730 (P.V-7) 6. Low-Voltage Power Supply PCB Circuit Diagram 230V V-5 7. Low-Voltage Power Supply PCB Circuit Diagram 115V V-6 8. High-Voltage
  • Brother International HL-720 | Service Manual - Page 99
    or Letter paper). This printer also supports 1200 (H) x 600 (V) dots per inch (dpi) for Windows DIB (Device Independent Bitmap) graphics. (It is recommended to add memory when printing in 1200 x 600 dpi mode.) User-Friendly Operation for Windows The dedicated printer driver and TrueTypeTM-compatible
  • Brother International HL-720 | Service Manual - Page 100
    mode. Low Running Cost The toner cartridge is separate from the drum unit. You need to replace only the toner cartridge after around 2,000 pages, which is cost effective and ecologically friendly. (In some countries the printer is supplied with a starter toner cartridge which must be replaced after
  • Brother International HL-720 | Service Manual - Page 101
    Developer Drum unit, separate from the toner cartridge 2.2 Functions CPU IDT79R3041-20J 20Mhz Emulation Automatic emulation selection among HP LaserJet 5P (PCL Level 5e), EPSON FX-850, and IBM Proprinter XL Printer driver Windows 95/Windows 3.1 driver, supporting Brother Native Compression
  • Brother International HL-720 | Service Manual - Page 102
    (W x D x H) 366 (W) x 383 (D) x 250 (H) (when the output tray is closed and the Multi-purpose sheet feeder is removed.) Weight Approx. 7.0 kg (15.45 lb.) including the drum unit. I-4
  • Brother International HL-720 | Service Manual - Page 103
    a general block diagram of this printer. Optional RAM (SIMM) (max Laser scanner unit Drum unit Transfer block Drive block (Stepping motor) Paper tray unit Paper tray Manual feed Developing block Drum Charging block Cleaner block Toner cartridge Image generation system Fig. 2.1 Fixing unit
  • Brother International HL-720 | Service Manual - Page 104
    Block Diagram Fig. 2.2 shows a block diagram of the main PCB. Reset Circuit CPU Core (R3041) BUS INT A S I C Oscillator (4MHz Option Serial I/O (RS232C & RS422A) CDCC Parallel I/O Soft Support EEPROM (512 x8 bits) EEPROM I/O Motor Driver Engine Control I/O To PC To Panel Sensor PCB Fig.
  • Brother International HL-720 | Service Manual - Page 105
    1.3 Main PCB 1.3.1 CPU Core Fig. 2.3. shows the CPU circuit block on the main PCB. The CPU is an IDT 79R3041-20J which is driven at a clock frequency of 20 MHz. This clock frequency is made by dividing the source clock of 40.0 MHz into two. The address and data bus are both 32 bit of AD0 to AD31 and
  • Brother International HL-720 | Service Manual - Page 106
    1.3.2 ASIC The ASIC is composed of a Cell Based IC and has the following function blocks. (1) Oscillator circuit Generates the main clock for the CPU by dividing the source clock frequency by two. (2) Address Generator This controls the address buss by latching the AD buss signals with the ALE
  • Brother International HL-720 | Service Manual - Page 107
    I/O There are two modes in this unit. One is the CPU receiving mode and the other is speed MODE as shown above. BUSY goes LOW at the rising edge of ACK. This supports the IEEE1284 data transfer with the following mode. Nibble mode Byte mode ECP mode (9) Data
  • Brother International HL-720 | Service Manual - Page 108
    (12) 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. 2.4 II-6
  • Brother International HL-720 | Service Manual - Page 109
    1.3.3 ROM A program and font data are stored in the 4MBytes ROM. ROM is composed by the two 16 Mbits masks and is mounted to the 42 pin IC socket. And 16 Mbits Flash ROM Module can be mounted to it, too. Fig. 2.5 II-7
  • Brother International HL-720 | Service Manual - Page 110
    1.3.4 DRAM Two 4M-bit DRAMs (x 16bits) are used as the RAM. Fig. 2.6 II-8
  • Brother International HL-720 | Service Manual - Page 111
    1.3.5 Optional RAM As the option RAM, 32 bit SIMM of 72 pin can be mounted. SIMM has one slot and can deal with 1 MBytes to 32 MBytes. Fig. 2.7 II-9
  • Brother International HL-720 | Service Manual - Page 112
    1.3.6 Optional Serial I/O The interrupt of serial I/O are input to the EXINT terminal of the ASIC, and are recognized by the CPU. A 32-byte space for register is provided for this I/O, which are read and written to by the CPU. Fig. 2.8 1.3.7 EEPROM The EEPROM is X24C04F type of a two-wire method
  • Brother International HL-720 | Service Manual - Page 113
    1.3.8 Reset Circuit The reset IC is PST591DMT. The reset voltage is 4.2V (typ.) and the LOW period of reset is 50 ms (typ). Fig. 2.10 1.3.9 CDCC I/O Fig. 2.11 shows the CDCC interface circuit. Fig. 2.11 II-11
  • Brother International HL-720 | Service Manual - Page 114
    1.3.10 Engine I/O Fig. 2.12 shows the engine interface circuit. Fig. 2.12 II-12
  • Brother International HL-720 | Service Manual - Page 115
    1.3.11 Paper Feed Motor Drive Circuit Fig. 2.13 II-13
  • Brother International HL-720 | Service Manual - Page 116
    off the power switch and unplug the power cord from the power outlet before accessing any parts inside the printer. (2) Be careful not to lose screws, washers, or other parts removed during servicing. (3) Be sure to apply grease to the gears and other positions as specified in this chapter. (4) When
  • Brother International HL-720 | Service Manual - Page 117
    FLOW III-2 1 DRUM UNIT B 2 TOP COVER 3 MP PAPER TRAY ASSY 4 FIXING UNIT C 5 SCANNER UNIT A 15 TRAY EXTENSION 16 PAPER EJECT TRAY ASSY A BOTTOM 6 MAIN PCB ASSY B 7 BASE PLATE ASSY 8 PANEL SENSOR PCB ASSY 9 LOW-VOLTAGE PS PCB ASSY C 12 DRIVE UNIT 13 MAIN MOTOR ASSY
  • Brother International HL-720 | Service Manual - Page 118
    (1) Open the top cover. (2) Lift out the drum unit. Top cover Drum unit Fig. 3.1 3.2 Top Cover (1) Open the top cover to the first lock position. (2) Prize up the top cover link and free it from the dowel on
  • Brother International HL-720 | Service Manual - Page 119
    (4) Open the top cover further, release the catches on both sides by sliding the top cover backward. Top cover Bottom cover Catches Sub cover Fig. 3.3 3.3 Multi-purpose Paper Tray Assembly (1) Pull the left rib outwards from the MP tray and pull out the MP tray. It is not necessary to release
  • Brother International HL-720 | Service Manual - Page 120
    (Blue) Heater harness (Brown) Thermistor harness (White) EL PCB Fig. 3.5 (3) Remove the two M3x10 screws. (4) Open the fixing unit cover along the open side of the fixing unit cover. Fixing unit cover Taptite, M3x10 Fixing unit cover Pressure roller Shaft Fixing unit frame Fig. 3.5a III-5
  • Brother International HL-720 | Service Manual - Page 121
    (5) Release the right side of the paper eject roller shaft. (6) Remove the four eject pinch rollers and the pinch springs from the fixing unit frame. Then, remove the pinch spring from each pinch roller. Paper eject roller shaft Pinch Spring Eject Pinch Roller Fig. 3.5b (7) Remove the M3x10 screw
  • Brother International HL-720 | Service Manual - Page 122
    to obtain access to the panel sensor PCB. (3) Disconnect the three scanner unit connectors from the panel sensor PCB. (4) Remove the screw and disassemble the Toner sensor PCB from the Scanner unit. Mirror Toner sensor PCB Scanner unit S Seal sponge 1 Connectors (P2, P3, P9) Panel sensor PCB Fig
  • Brother International HL-720 | Service Manual - Page 123
    : Prior to turning the printer upside-down, the drum unit should be removed from the printer. (1) Turn the printer upside down. (2) Remove P2, P3 and P9 have already disconnected when disassembling the scanner unit. See page, III5). A Panel sensor PCB assy Main Shield Solenoid harness (
  • Brother International HL-720 | Service Manual - Page 124
    -voltage power supply PCB assy and lift the PCB. (2) Disconnect the four connectors from the PCB. Insulation sheet High-voltage power supply PCB assy Drum ground PCB harness (P4) Fan motor harness (P2) Erase lamp harness (P3) Density volume HV Flat cable (P1) Density dial Fig. 3.11 NOTE: When
  • Brother International HL-720 | Service Manual - Page 125
    3.11 Fan Motor (1) Disconnect the connector from the high-voltage power supply PCB. ( It should have been disconnected already, see above) (2) Lift out the fan motor assy. Fan motor assy Fig. 3.12 3.12 Drive Unit (1) Remove the four screws securing the drive unit. Drive unit Fig. 3.13 III-10
  • Brother International HL-720 | Service Manual - Page 126
    3.13 Main Motor Assy and Motor Heat Sink (1) Remove the two screws securing the main motor assy. (2) Remove the two screws securing the motor heat sink. Motor heat sink Main motor assy Fig. 3.14 3.14 Gears and Solenoid (1) Apply grease the points shown below. Grease: MOLYKOTE EM-30L TKC-0
  • Brother International HL-720 | Service Manual - Page 127
    3.15 Tray Extension (1) Put the tray extension assembly down towards the front of the printer, and pull the bottom of both side legs outwards to release it. Tray extension Multi-purpose paper tray assy Manual paper tray Fig. 3.16 3.16 Paper Eject Tray Assy (1) Open the paper eject tray. (2) Press
  • Brother International HL-720 | Service Manual - Page 128
    core secured to the LD harness on the back of the scanner unit, and then carefully cut the tywrap to remove the ferrite core secured motor harness, the solenoid harness and the drum ground PCB assy harness which all pass through the core. Core TFC Drum ground PCB assy Solenoid Tywrap Fig. 3.19
  • Brother International HL-720 | Service Manual - Page 129
    4. PACKING Documents Carton, SF assy Drum/Toner box assy Pad NO RTN form Insertion DC Dust cover Pad Bag Sheet Carton Fig. 3.20 III-14
  • Brother International HL-720 | Service Manual - Page 130
    CHAPTERIV TROUBLESHOOTING 1. INSPECTION MODE 1.1 Inbuilt Inspection Modes The printer incorporates the following inspection modes inspection modes are assigned to the respective LEDs as shown below. LED DRUM ALARM READY DATA DRUM + ALARM ALARM + READY READY + DATA Type of inspection Factory
  • Brother International HL-720 | Service Manual - Page 131
    OFF (No toner cartridge is installed.) DRUM LED ON DRUM LED OFF ALARM LED ON ALARM LED OFF READY LED OFF READY LED ON DATA LED OFF DATA LED ON The procedure for the factory inspection mode is as follows. (1) Open the top cover and remove the drum unit. (2) Turn on the power to the printer while
  • Brother International HL-720 | Service Manual - Page 132
    description of those errors as follows; • Service A: Address Error • Service B: Bus Error • CPU Runtime Error: Other CPU errors such as Illegal Instruction or Operation Overflow LED error indications FUSER MALFUNCTION DRUM ALARM READY (PAPER) DATA (TONER) A lapse of time : OFF : ON IV
  • Brother International HL-720 | Service Manual - Page 133
    SLOT1 SIMM LVPS POWER SWITCH CN1 CN101 MAIN PCB ENGINE I/F P2 MAIN MOTOR M PANEL SENSOR PCB P8 P5 TONER SCANNER MOTOR P9 P1 P3 REGIST P4 LASER T/R SOLENOID CLN GRID DEV P2 P7 P6 DRUM GROUND PCB P4 HVPS LEDs FAN P2 P3 EJECT P1 SW COVER SW ERASE LAMP HEATER THERMISTOR
  • Brother International HL-720 | Service Manual - Page 134
    Appendix 2. Main PCB Circuit Diagram (1/3) CODE NAME UK3227000 B48K272CIR(1/3)
  • Brother International HL-720 | Service Manual - Page 135
    Appendix 3. Main PCB Circuit Diagram (2/3) CODE NAME UK3227000 B48K272CIR(2/3)
  • Brother International HL-720 | Service Manual - Page 136
    Appendix 4. Main PCB Circuit Diagram (3/3) CODE NAME UK3227000 B48K272CIR(3/3)
  • Brother International HL-720 | Service Manual - Page 137
    Appendix 6. Low-Voltage Power Supply PCB Circuit Diagram 230V L SW1 F1 CN1 C15 C7 B FG FG BEA1 C8 R5 R6 PC1 Q2 R10 C13 R8 R13 R11 C10 R9 D4 C11 D6 R17 D7 R7 C9 Q1 R18 Z1 C1 D11 D14 NTC1 L1 C5 + D13 D12 R1 R2 R3 C6 C22 R23 PC2 R20 R21 R22 TRA1 Z2 T1 CN1 C102 D101
  • Brother International HL-720 | Service Manual - Page 138
    Appendix 7. Low-Voltage Power Supply PCB Circuit Diagram 115V L SW1 F1 N C7 B FG FG BEA1 C8 R5 R6 PC1 Q2 R10 C13 R8 R13 R11 C10 R9 D4 C11 D6 R17 D7 R7 C9 Q1 R18 C1 D11 D14 NTC1 L1 C5 Z1 + D13 D12 R2 C22 R23 PC2 C6 R20 R21 R22 TRA1 Z2 T1 CN2 C102 D101 C203 R203
  • Brother International HL-720 | Service Manual - Page 139
    R LASER PRINTER PARTS REFERENCE LIST MODEL:HL-720/730/730Plus
  • Brother International HL-720 | Service Manual - Page 140
    NOTE FOR USING THIS PARTS REFERENCE LIST 1.In the case of ordering parts, it needs mentioning the following items: (1) Code (2) Q'ty (3) Description (4) Symbol ( PCB No., Revision , and Parts location mounted on the PCB.) Note : No orders without Parts Code or Tool No. can be accepted. < Example >
  • Brother International HL-720 | Service Manual - Page 141
    2 POWER CORDS & PACKING DRAWING 3 1. FRAME / DRIVE 4 2. SCANNER 4 3. PAPER TRAY 5 4. FIXING UNIT 5 5. CABINET 6 6. MAIN PCB 7 7. PANEL / SENSOR PCB 7 8. LOW-VOLTAGE POWER SUPPLY UNIT 8 9. HIGH-VOLTAGE POWER SUPPLY UNIT 8 10. POWER CORDS 9 11. PACKING 9-1 12. DOCUMENTS 10 13. ADJUSTING
  • Brother International HL-720 | Service Manual - Page 142
    VOLTAGE P6 SOLENOID 1 2 1 JW5 R1 5 P2 LASER 1 5 1 S1CANNER5 MOTOR P1 JW2 P3 JW3 1 PC1 JW1 C1 + FEED P5 MOTOR 21 1 6 1 TONER3 4 1 P9 0123456789 ABCDE FGH J K LM 96 97 B48K225--5 P8 ENGINE 40 20 PCB SILK-SCREEN PRINTING DRAWING Fig.1 MAIN PCB (HL-720) 30 14 15 P2 EXRAM 17
  • Brother International HL-720 | Service Manual - Page 143
    -P026 / 97-P045 / 97-P050 / 97-P068 / PR97028 / PR97040 / PR98271 / PR98292 12-18 5-36 12-16 12-17 12-8 12-1 12-2 12-3 12-4 12-5 MODEL HL-720/730 84U-501/601
  • Brother International HL-720 | Service Manual - Page 144
    POWER CORDS & PACKING DRAWING 10- 1A 1F 1B 1G 1C 1H 1D 1I 1E 1J 11-7 11-4 11-5 11-3 11-3 11-1 , 2 11-6 MODEL HL-720/730 84U-501/601 -230/930 TI No.96-P012 / 96-P014 / 96-P019 / 96-P051 / 97-P026 / 97-P044 / PR97146 / PR98031
  • Brother International HL-720 | Service Manual - Page 145
    UNIT (SP) 1 S SHEET 1 1 S SHEET 2 1 TONER SENSOR PCB ASSY 1 TAPTITE, CUP B M3X8 3 TAPTITE, BIND B M4X12 1 S SEAL SPONGE 1 1 LASER CAUTION LABEL, EUR 1 LASER CAUTION LABEL, LEGEND 1 CAUTION LABEL, TONER REMARK T/I No. 96-P019 / 96-P036 / 97-P014 / 97-P045 / 97-P072 MODEL HL-720/730
  • Brother International HL-720 | Service Manual - Page 146
    3. PAPER TRAY REF.NO. CODE Q'TY DESCRIPTION 1 UL6876001 1 MP TRAY ASSY (SP), GRAY1227 REMARK MODEL HL-720/730 84U-501/601-040 4. FIXING UNIT REF.NO. CODE 1-10 UL6877001 1-10 UL6878001 1-10 UU7442001 1-10 UL7934001 1 UL6879001 1 UL6880001 2 UL6616001 3 UL6688001 3 UL7928001
  • Brother International HL-720 | Service Manual - Page 147
    , CAN HL-720 1 MYLAR LABEL, USA HL-730 1 MYLAR LABEL, USA HL-730DX 1 MYLAR LABEL, CAN HL-730/730DX 1 MYLAR LABEL, USA HL-730+ 1 MYLAR LABEL, USA HL-730DX+ 1 MYLAR LABEL, CAN HL-730+/730DX+ 1 PAPER SET LABEL, USA/CAN 1 PATENT LABEL, USA/CSA HL-730/730DX 1 MAIN SHIELD 1 GUIDE FILM MODEL HL-720/730
  • Brother International HL-720 | Service Manual - Page 148
    MAIN PCB ASSY W (SP), LEGEND HL-720 1 MAIN PCB ASSY P (SP), HL-730/730DX 1 MAIN PCB ASSY P (SP), HEB HL-730 1 MAIN PCB ASSY 1M (SP), HL-730+/730DX+ 1 MAIN PCB ASSY 1M (SP) HEB, HL-730+ 1 MASK ROM:KM23C4100C HL-730/730+ 1 PROM:HL730HEB ASSY, HL-730/730+ MODEL HL-720/730 84U-501/601-102/101/104
  • Brother International HL-720 | Service Manual - Page 149
    UK3061001 1 LV HARNESS ASSY 3 UK3062001 1 HEATER HARNESS ASSY 4 J02101051 1 BINDER 2.3X79 REMARK TI NO.96-P072 MODEL HL-720/730 84U-501/601-200/201 9. HIGH-VOLTAGE POWER SUPPLY UNIT REF.NO.SYMBOL CODE Q'TY DESCRIPTION 1 UK3192001 1 HIGH-VOLTAGE PS PCB ASSY (SP) 2 UK3059000 1 HV FLAT
  • Brother International HL-720 | Service Manual - Page 150
    , HEB 1 AC CORD ASSY, S.AF 1 AC CORD ASSY, CHLI 1 AC CORD ASSY, CHN REMARK TI NO. 96-P012 / 96-P051 / 97-P044 / PR97146 / PR98037 MODEL HL-720/730 84U-501/601-230
  • Brother International HL-720 | Service Manual - Page 151
    YONG+ 1 CARTON, USA/CAN 1 STYROFORM PAD ASSY 1 CARTON, SF ASSY 1 BAG, 700X800H (BODY) 1 SHEET, 200X300 (BODY) 1 NO RETURN FORM, US 1 RETURN FORM CANADA REMARK MODEL HL-720/730 84U-501/601-930 TI NO. 96-P012/96-P014/96-P019/96-P026/96-P030/96-P051/96-P076/97-P016/97-P026
  • Brother International HL-720 | Service Manual - Page 152
    HL-720/730 1 USER'S MANUAL, GER HL-720/730 1 USER'S MANUAL, NOR HL-720/730 1 USER'S MANUAL, NLD HL-720/730 1 USER'S MANUAL, ITA HL-720/730 1 USER'S MANUAL, SWE HL-720/730 1 USER'S MANUAL, DEN HL-720/730 1 USER'S MANUAL, KOR HL-720/730 1 USER'S MANUAL, KOR OEM SSANG YONG 1 SET GUIDE, USA HL-720
  • Brother International HL-720 | Service Manual - Page 153
    REF.NO. CODE Q'TY DESCRIPTION 17 UL6996001 1 INSERTION DC 18 UL7916001 1 HL-730+ INSERTION SHEET CHN REMARK MODEL HL-720/730 84U-501/601-920 TI NO. 96-P014/96-P019/96-P020/96-P030/96-P037/96-P038/96-P040/96-P45/96-P052/
  • Brother International HL-720 | Service Manual - Page 154
    GE-676) LUBRICATING GREASE(MOLYKOTE EM-30L TKC-0)1KG LUBRICATING GREASE(MOLYKOTE EM-D110) 1KG TESTER (MD-200C) TI No.96-P014 / 96-P016 MODEL HL-720/730 84U-501/601 -99A
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SERVICE
MANUAL
MODEL:HL-720/730/730Plus
R
LASER PRINTER