Brother International 8250P Service Manual

Brother International 8250P - FAX B/W Laser Printer Manual

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  • Brother International 8250P | Service Manual - Page 1
    FACSIMILE EQUIPMENT SERVICE MANUAL MODEL: FAX2750/FAX-8050P/FAX-8250P MFC4350/MFC4650/MFC6650MC/ MFC-9050/MFC-9550
  • Brother International 8250P | Service Manual - Page 2
    © Copyright Brother 1998 All rights reserved. No part of this publication may be reproduced in any form or by any means without permission in writing from the publisher. Specifications are subject to change without notice.
  • Brother International 8250P | Service Manual - Page 3
    This publication is a Service Manual covering the specifications, construction, theory of operation, and maintenance of the Brother facsimile equipment. It includes information required for field troubleshooting and repair--disassembly, reassembly, and lubrication--so that service personnel will be
  • Brother International 8250P | Service Manual - Page 4
    1968. This means that the printer does not produce hazardous laser radiation. Since radiation emitted inside the printer is completely confined within the protective housings and external covers, the laser beam cannot escape from the machine during any phase of user operation. CDRH Regulations (110
  • Brother International 8250P | Service Manual - Page 5
    CHAPTER I. GENERAL DESCRIPTION
  • Brother International 8250P | Service Manual - Page 6
    CONTENTS 1. EQUIPMENT OUTLINE I-1 1.1 External Appearance and Weight I-1 1.2 Components I-1 2. SPECIFICATIONS I-2
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    OUTLINE 1.1 External Appearance and Weight The figure below shows the equipment appearance and approximate dimensions. Weight: Machine proper Machine (incl. drum unit & toner cartridge) In package Approx. 7.2 kg Approx. 8.5 kg Approx. 12 kg 1.2 Components The equipment consists of the following
  • Brother International 8250P | Service Manual - Page 8
    I - 2
  • Brother International 8250P | Service Manual - Page 9
    Fonts Disk Based Paper Handling Multi-Purpose Sheet Feeder Printer Driver Utility Software Period to go in Sleep Mode Output x 391 99 50, 75, 87, 93, 100, 120, 125, 150, 200% Yes Yes Toshiba 3080 (14.4K FAX Only) G3 MH/MR/MMR Yes 6 64 Yes Yes Yes 8.5" x 8.5" 16 x 2 Yes No *1 Optional CD-ROM
  • Brother International 8250P | Service Manual - Page 10
    Fonts Disk Based Paper Handling Multi-Purpose Sheet Feeder Printer Driver Utility Software Period to go in Sleep Mode Output x 391 99 50, 75, 87, 93, 100, 120, 125, 150, 200% Yes Yes Toshiba 3080 (14.4K FAX Only) G3 MH/MR/MMR Yes 6 64 Yes Yes Yes 8.5" x 8.5" 16 x 2 Yes No *1 Optional CD-ROM
  • Brother International 8250P | Service Manual - Page 11
    (1/2) Model FAX-8050P FAX-8250P Color PRINTER Engine/Type PPM dpi (output resolution) Paper Capacity Emulation (Standard) Standards Memory (Typical) Memory (Min.) Fonts Resident Fonts Disk Based Paper Handling Multi-Purpose Sheet Feeder Printer Driver Utility Software Period to go in Sleep Mode
  • Brother International 8250P | Service Manual - Page 12
    Disk Based Paper Handling Multi-Purpose Sheet Feeder Printer Driver Utility Software Period to go in Sleep Mode 87, 93, 100, 120, 125, 150, 200% Yes Yes Yes Yes Toshiba 3080 (14.4K FAX Only) Toshiba 3080 (14.4K FAX Only) G3 G3 MH/MR/MMR MH/MR/MMR Yes Yes 6 6 64 64 Yes Yes Yes Yes
  • Brother International 8250P | Service Manual - Page 13
    Yes 2 MB 1/2 MB Available with option *1 (PRINTER/FAX, PRINTER/SCAN, PRINTER/COPY) Data Modem Bundled Software Applications No Available with option *1 PC-FAX (Send/Receive) [SMSI] Scanner Application Viewer Application Network Application [Brother] [Visioneer] No Class 1 No *1 Optional CD
  • Brother International 8250P | Service Manual - Page 14
    Memory (Opt Upgrade) Yes 2 MB 1/2 MB Simultaneous Operation Data Modem Yes (PRINTER/FAX, PRINTER/SCAN, PRINTER/COPY) No Bundled Software Applications PC-FAX (Send/Receive) Scanner Application Yes SMSI Brother Viewer Application Visioneer Class 1 No **31 Optional CD-ROM required. According
  • Brother International 8250P | Service Manual - Page 15
    According to the Brother chart in standard mode, MMR. Specifications enclosed in brackets are available if options are used. (2/2) FAX-8250P 12 x 2 with option *1 (PRINTER/FAX, PRINTER/SCAN, PRINTER/COPY) No Yes Yes Yes Available with option *1 [Wordcraft] [Brother] [Wordcraft] No No I - 9
  • Brother International 8250P | Service Manual - Page 16
    PRINTER/COPY) Yes (PRINTER/FAX, PRINTER/SCAN, PRINTER/COPY) Data Modem No No Remote Diagnostics Yes Yes Memory Security No No Memory Backup No Yes Bundled Software Applications Available with option *1 Yes PC-FAX (Send/Receive) [Wordcraft] Wordcraft Scanner Application [Brother
  • Brother International 8250P | Service Manual - Page 17
    CHAPTER II. INSTALLATION
  • Brother International 8250P | Service Manual - Page 18
    CONTENTS 1. INSTALLING THE UPDATE DATA TO THE FACSIMILE EQUIPMENT II-1
  • Brother International 8250P | Service Manual - Page 19
    interface port on the back of the equipment and secure it with the lock wires. (4) Connect the other end of the interface cable to the printer port of your computer and secure it with the two screws. (5) Power on your computer. (6) Plug the equipment's power cord into a wall socket. Interface cable
  • Brother International 8250P | Service Manual - Page 20
    /b Then press the ENTER key. The equipment beeps and shows the "CONNECTING" on the LCD for one second. Then, the equipment shows the "DOWNLOADING" on the LCD and starts receiving data downloaded from the host computer. During downloading, the equipment beeps intermittently. Upon completion of the
  • Brother International 8250P | Service Manual - Page 21
    CHAPTER III. THEORY OF OPERATION
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    1. OVERVIEW...III-1 2. MECHANISMS...III-2 2.1 Scanner Mechanism III-3 2.1.1 Document feeding and ejecting mechanism III-3 2.1.2 Scanner III-3 2.2 Laser Printing Mechanism III-4 2.2.1 Paper pulling-in, registration, feeding, and ejecting mechanism III-4 2.2.2 Print process mechanism III
  • Brother International 8250P | Service Manual - Page 23
    1. OVERVIEW *Not provided on the FAX-8250P/MFC-9050. III - 1
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    is classified into the following mechanisms: n SCANNER MECHANISM - Document feeding and ejecting mechanism - Document scanning mechanism n LASER PRINTING MECHANISM - Paper pulling-in, registration, feeding, and ejecting mechanisms - Print process mechanism (consisting of charging, exposing
  • Brother International 8250P | Service Manual - Page 25
    2.1 Scanner Mechanism 2.1.1 Document feeding and ejecting mechanism This mechanism consists of the document stacker, automatic document feeder (ADF), document ejection roller ASSY, and document sensors. (For details about the sensors, refer to Section 2.3.) If the operator sets documents on the
  • Brother International 8250P | Service Manual - Page 26
    2.2 Laser Printing Mechanism 2.2.1 Paper pulling-in, registration, feeding, and ejecting mechanism III - 4
  • Brother International 8250P | Service Manual - Page 27
    Paper pulling-in and registration mechanism The paper pulling-in and registration mechanism consists of the pull-in roller gear (incorporated in the multi-purpose sheet feeder), planetary gear system, paper feed solenoid, solenoid lever, clutch release lever, and registration sensor. (For the
  • Brother International 8250P | Service Manual - Page 28
    2.2.2 Print process mechanism The print process unit works with laser beam, electrical charges, and toner. The graph below shows the transition of electrical charge on the surface of the laser-sensitive drum through the five processes: charging, exposing, developing, transferring, and erasing
  • Brother International 8250P | Service Manual - Page 29
    . 1000V which is kept by the varister grounding the grid to the frame. (2) Exposing process When the laser-sensitive drum holds a positive electrical charge, the laser beam issued from the laser unit scans the drum according to the print image to expose the drum surface for neutralizing the spots
  • Brother International 8250P | Service Manual - Page 30
    formed on the drum in the exposing process, into a toner image. The developer roller attracts the toner particles fed from the toner cartridge by the toner supply roller, and then conveys them to the contact section with the laser-sensitive drum On the contact section between the developer roller
  • Brother International 8250P | Service Manual - Page 31
    2.2.3 Heat-fixing mechanism As the paper passes between the heater roller and the pressure roller in the heat-fixing unit, the heater roller fuses the toner on the paper. III - 9
  • Brother International 8250P | Service Manual - Page 32
    voltage power supply PCB Toner sensor PCB Toner sensor PCB Heat-fixing unit Hook switch PCB* *Not provided on the FAX-8250P/MFC-9050. • Toner sensor which detects whether there is toner or a toner cartridge is loaded. • Toner thermister which detects the ambient temperature of the toner cartridge
  • Brother International 8250P | Service Manual - Page 33
    *Not provided on the FAX-8250P/MFC-9050. Location of Sensors and Actuators III - 11
  • Brother International 8250P | Service Manual - Page 34
    3. CONTROL ELECTRONICS 3.1 Configuration The hardware configuration of the facsimile equipment is shown below. (NOTE 1) (NOTE 2) Provided on the FAX-8250P/MFC-9050 (French version only)/MFC-9550/MFC6650MC. Provided on the European, Australian, Indonesian, and Asian versions. Configuration of
  • Brother International 8250P | Service Manual - Page 35
    3.2 Main PCB The main PCB, which is the nucleus controlling the entire operation of the equipment, consists of a FAX engine (ASIC), memories, MODEM, motor drive circuitry, sensor detection circuitry, and analog circuits for scanning, printing, and power transmission shifting. EEPROM:Electrically
  • Brother International 8250P | Service Manual - Page 36
    III - 14
  • Brother International 8250P | Service Manual - Page 37
    3.3 NCU PCB The NCU PCB switches the communications line to telephone or built-in MODEM, under the control of the main PCB. U.S.A. versions III - 15
  • Brother International 8250P | Service Manual - Page 38
    European versions III - 16
  • Brother International 8250P | Service Manual - Page 39
    . The control panel unit consists of a gate array, an LCD and LEDs, which are controlled by the gate array according to commands issued from the FAX engine on the main PCB. The panel FPC is a flexible keyboard PCB which integrates the key matrix having rubber keytops. Control Panel PCB and its
  • Brother International 8250P | Service Manual - Page 40
    PCB The low-voltage power supply uses the switching regulation system to generate DC power (+5V and +24V) from a commercial AC power supply for the driver circuits. The +5V source is fed to the logic, control panel, sensors, CIS unit, etc. The 24V source is fed to the motors, solenoid, fan
  • Brother International 8250P | Service Manual - Page 41
    [ 2 ] High-voltage power supply PCB This power supply generates high-voltage power sources from the 24V source fed from the lowvoltage power supply for charging, developing, and transferring in the laser printing process. High-voltage Power Supply Circuit III - 19
  • Brother International 8250P | Service Manual - Page 42
    CHAPTER IV. DISASSEMBLY/REASSEMBLY AND LUBRICATION
  • Brother International 8250P | Service Manual - Page 43
    ...IV-21 1.9 Handset Mount and Hook Switch PCB (for models except the FAX-8250P/MFC-9050) Side Cover (for the FAX-8250P/MFC-9050 IV-24 1.10 Heat-fixing Unit, FU Lamp, and Paper Ejection Sensor Actuator IV-26 1.11 Laser Unit and Toner Sensor PCB IV-28 1.12 Bottom Plate IV-29 1.13 Low-voltage
  • Brother International 8250P | Service Manual - Page 44
    2. LUBRICATION...IV-45 [ 1 ] Document feed roller ASSY and document ejection roller ASSY IV-45 [ 2 ] Control panel locks IV-46 [ 3 ] Scanner frame ASSY and separation roller gear IV-46 [ 4 ] Top cover lock spring IV-47 [ 5 ] Gear drive unit IV-47 ii
  • Brother International 8250P | Service Manual - Page 45
    . (2) When servicing the optical system of the laser printing unit, be careful not laser beam. Be sure to take off any personal accessories such as wrist watches and rings before working on the printer such as aluminum foil. WARNING For the FAX-8250P/MFC-9050 (French version only)/MFC-9550/MFC6650MC
  • Brother International 8250P | Service Manual - Page 46
    Min. 2 3 to 6 3 to 6 Handset mount Taptite, cup B M3x10 2 8 ±2 2 to 6 Heat-fixing unit Taptite, bind B M4x12 1 10 ±2 4 to 6 Laser unit Toner sensor PCB Taptite, bind B M4x12 Taptite, cup B M3x8 3 8 ±2 1 6 ±2 3 to 6 3 to 5 Bottom plate AC grounding wire Interface connector Taptite
  • Brother International 8250P | Service Manual - Page 47
    the paper wire extension - the document wire extension - the document tray, - the paper tray, and - the drum unit (with the toner cartridge loaded) (*Not provided on the FAX-8250P/MFC-9050) n How to Access the Object Component • On the next page is a disassembly order flow which helps you access the
  • Brother International 8250P | Service Manual - Page 48
    n Disassembly Order Flow IV - 4
  • Brother International 8250P | Service Manual - Page 49
    1.1 ROM Cover, Option Cover, and Battery ASSY* (*Provided on the FAX-8250P/MFC-9050 (French version only)/MFC-9550/MFC6650MC) (1) As shown below, push down section "a" of the ROM cover and tilt it to the rear. (2) Take
  • Brother International 8250P | Service Manual - Page 50
    remove the main PCB in the following procedures, take out the battery ASSY from its supports and put it on the main PCB with the battery harness being connected. (*Provided on the FAX-8250P/MFC-9050 (French version only)/ MFC-9550/MFC6650MC) (** Provided on the European, Australian, Indonesian, and
  • Brother International 8250P | Service Manual - Page 51
    1.2 Multi-purpose Sheet Feeder (1) Open the top cover. (2) Remove one of two screws from each of right and left top cover stoppers, and then fully open the top cover. (3) Pull either one of the right and left tabs provided on the main cover outwards and slightly lift up the multi-purpose sheet
  • Brother International 8250P | Service Manual - Page 52
    1.3 Document Guide Base (1) Turn up the document guide base towards you. (2) Push the right or left end of the document guide base inwards and take it off. IV - 8
  • Brother International 8250P | Service Manual - Page 53
    1.4 Control Panel ASSY (1) Slightly open the control panel ASSY. (2) Push the right and left arms of the control panel ASSY outwards (in the direction of arrow •) with your thumbs and open the control panel ASSY further (arrow ,) to unhook those arms from bosses "x" provided on the scanner frame
  • Brother International 8250P | Service Manual - Page 54
    and shield film will become unusable and new parts will have to be put back in. (4) To remove the document pressure bar, pull either of supports "a" provided on the panel rear cover outwards and then lift the pressure bar up and towards the rear to release the three tabs from the
  • Brother International 8250P | Service Manual - Page 55
    turn the document front sensor actuator to the rear and lift it up. (9) Unhook the document sensor PCB from two "Y" latches. (10) FAX2750/MFC-8250P/MFC4350/MFC-9050/MFC4650: Unhook the control panel PCB from three "Z" latches. MFC6650MC/MFC-9550: Unhook the MC PCB from "W" latch and then unhook the
  • Brother International 8250P | Service Manual - Page 56
    (12) As shown below, insert the tip of a flat screwdriver under clamp "A" from the rear and push up clamp "A" slightly to release the LCD, and then take out the LCD while pulling the LCD flat cable gently. NOTE: Do not take out the LCD except when the LCD is defective and requires replacement. n
  • Brother International 8250P | Service Manual - Page 57
    1.6 Document Feed Roller ASSY and Document Ejection Roller ASSY (1) Lightly push down arm rib "a" and shift the document feed roller ASSY to the right and upwards. (2) Lightly push down arm rib "b" and shift the document ejection roller ASSY to the right and upwards, without removing the shield film
  • Brother International 8250P | Service Manual - Page 58
    1.7 Scanner Frame ASSY (1) You can remove the following parts from the top of the scanner frame ASSY without taking out the ASSY from the top cover. • CIS film • Shield film • CIS unit (shown on the next page). Lightly pull up the arm, move the CIS unit to the left, and lift up the right edge of the
  • Brother International 8250P | Service Manual - Page 59
    (2) Open the top cover. (3) Disconnect the scanner motor harness from the scanner motor ASSY without removing the shield film. IV - 15
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    (4) Close the top cover. (5) Remove the two screws from the scanner frame ASSY. (6) Lift up the rear edge of the scanner frame ASSY to release the three pawls provided on the front end from the top cover, then hold up the ASSY and disconnect the CIS harness (if the CIS is mounted). (7) Take off the
  • Brother International 8250P | Service Manual - Page 61
    (8) Turn the scanner frame ASSY upside down. (9) Remove the screw from the scanner motor and turn the motor clockwise to release from the latch. (10) Take off the scanner grounding leaf spring by removing the screw. (11) Take off the CIS shield plate by removing the screw. (12) Remove the pinch
  • Brother International 8250P | Service Manual - Page 62
    (14) Remove the pressure roller leaf springs by pulling them in the direction of arrows • and , in this order as shown below. Then remove the pressure rollers and shaft. (15) Slightly push down the arm (in the direction of arrow •) and shift the separation roller gear to the right (arrow ,) when
  • Brother International 8250P | Service Manual - Page 63
    (16) Take off the scanner drive unit by removing the two screws. The separation roller gear also comes off. (17) Push down the CIS side spring to release it from the latch, then pull it out to the right (when viewed from the rear). IV - 19
  • Brother International 8250P | Service Manual - Page 64
    n Reassembling Notes • When reinstalling the scanner motor, fit it in the latch provided on the scanner frame with the connector facing up and then secure it with the screw. (See page IV-17.) • When setting the scanner frame ASSY back into place, - secure the grounding terminal to the scanner frame
  • Brother International 8250P | Service Manual - Page 65
    1.8 Top Cover (1) Open the top cover. (2) Remove one of two screws from each of right and left top cover stoppers, and then fully open the top cover. (3) Pull the panel-main harness and CIS harness towards you. (4) Remove the adhesive tape and pull the scanner motor harness and grounding wire
  • Brother International 8250P | Service Manual - Page 66
    (5) Remove the four screws from the hinges R and L. (6) Slightly lift up the top cover to release the bosses from the hinges and take it off to the rear. (7) Remove the harness support sponges and take out the harnesses from the top cover. IV - 22
  • Brother International 8250P | Service Manual - Page 67
    hooks "A2" of the main cover, and then fix them with the support sponge. Route the panel-main harness and CIS harness through hooks "B1" through hooks "B2" of the main cover, and then fix them with the support sponge. • When connecting the scanner motor harness to the scanner motor connector, take
  • Brother International 8250P | Service Manual - Page 68
    1.9 Handset Mount and Hook Switch PCB (for models except the FAX-8250P/MFC-9050) Side Cover (for the FAX-8250P/MFC-9050) (1) Open the top cover. (2) Remove one of two screws from each of right and left top cover stoppers, then fully open the top
  • Brother International 8250P | Service Manual - Page 69
    (5) Disassemble the handset mount by unhooking two latches "a" of the upper handset mount with a flat screwdriver. (6) Remove the hook switch PCB ASSY by unhooking latch "b." (7) Disconnect the hook switch harness from the hook switch PCB n Reassembling Notes • When assembling the upper and lower
  • Brother International 8250P | Service Manual - Page 70
    1.10 Heat-fixing Unit, FU Lamp, and Paper Ejection Sensor Actuator (1) Open the top cover. (2) Remove one of two screws from each of right and left top cover stoppers, then fully open the top cover. (3) Remove screw "a." (4) Lift the left end of the heat-fixing unit up and to the left to release the
  • Brother International 8250P | Service Manual - Page 71
    (6) To take out the FU lamp from the heat-fixing unit, remove two screws "b." (7) Unhook the two latches outwards with the tip of a small flat screwdriver and open the upper cover. (8) Fully open the upper cover and remove it. (9) Remove screw "d" and loosen screw "c." (10) Hold the lock plate of
  • Brother International 8250P | Service Manual - Page 72
    PCB and disconnect its harness. (3) Remove the three screws from the laser unit. (4) Slightly lift up the laser unit and disconnect the following from the main PCB: - Laser diode harness (5-pin) - Toner sensor harness (4-pin) if the toner sensor PCB is installed - Polygon motor flat cable NOTE: When
  • Brother International 8250P | Service Manual - Page 73
    1.12 Bottom Plate (1) Turn the facsimile equipment upside down. (2) Remove two screws "b" from the interface connector. (3) Remove seven screws "c" and three screws "d" from the bottom plate. (4) Slightly lift up the bottom plate, then take off the AC cord bushing and remove screw "e" from the
  • Brother International 8250P | Service Manual - Page 74
    n Reassembling Notes • When putting the bottom plate into place, secure the grounding wire to the bottom plate with screw "e," fit the AC cord bushing into the cutout of the bottom plate, and fit the holes over the bosses of the main cover. First tighten screws "b" (interface connector screws) and
  • Brother International 8250P | Service Manual - Page 75
    the blue and brown wires) from the low-voltage power supply PCB. n Reassembling Notes • Be sure to route the heater harness through the three wire guides as illustrated above. IV - 31
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    rear side of the main cover, route the harnesses as shown on the next page. Hook the speaker harness on the left-hand battery support. For the FAX-8250P/MFC-9050 (French version only)/MFC-9550/MFC6650MC, route the battery harness as shown on the next page to hold the three harnesses (scanner
  • Brother International 8250P | Service Manual - Page 77
    *1 Provided on the FAX-8250P/MFC-9050 (French version only)/MFC6650MC/MFC-9550. *2 Provided on the on the European, Australian, Indonesian, and Asian versions. *3 Not provided on the FAX-8250P/MFC-9050. IV - 33
  • Brother International 8250P | Service Manual - Page 78
    Setting up the main PCB after replacement IV - 34
  • Brother International 8250P | Service Manual - Page 79
    from the highvoltage power supply PCB. n Reassembling Notes • Before reinstalling the high-voltage power supply PCB, check the high-voltage contacts for any toner particles, paper dust or dirt, and clean them out. • Be sure to route the drum grounding harness through boss "x" and latches "y" and
  • Brother International 8250P | Service Manual - Page 80
    main PCB (refer to Section 1.14). (2) Slightly lift up the main PCB and disconnect the fan harness from the main PCB. (3) Take out the fan support. (4) Pull up the fan. n Reassembling Notes • Put the fan back into place with the non-sponge end facing up and with the label side facing
  • Brother International 8250P | Service Manual - Page 81
    1.17 Registration Sensor Actuator, Sheet Feeder Cover Sensor Actuator, and Top Cover Sensor Actuator (1) Pull up the registration sensor actuator, sheet feeder cover sensor actuator, and top cover sensor actuator. 1.18 Speaker (1) Pull the speaker spring inwards and pull up the speaker. n
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    1.19 Gear Drive Unit (1) Make sure that the heat-fixing unit is removed. (2) Remove the three screws from the gear drive unit. (3) Lift the gear drive unit up and out of the main cover. IV - 38
  • Brother International 8250P | Service Manual - Page 83
    (4) To take off the motor cover and main motor, remove two screws "x." (5) To take off the paper feed solenoid, solenoid lever, or clutch release lever, remove three screws "y." "x" Motor cover Taptite, cup S M3x8 Solenoid spring Main motor Motor bracket "y" Solenoid lever Clutch release lever
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    1.20 NCU PCB (1) Make sure that the MJ cover, low-voltage power supply PCB and gear drive unit are removed. (2) Remove the screw from the NCU bracket. (3) Slightly lift up the NCU bracket (which holds the NCU PCB) and then disconnect the NCU harness from the NCU PCB. (* Provided on the European,
  • Brother International 8250P | Service Manual - Page 85
    (4) Remove the screw and take off the NCU PCB from the NCU bracket. (* Provided on the European, Australian, Indonesian, and Asian versions.) n Reassembling Notes • When setting the NCU PCB to the NCU bracket, fit its edges onto "b" and "c" and into "a" and "d" as illustrated above. • European,
  • Brother International 8250P | Service Manual - Page 86
    1.21 Scanner Grounding Plate (1) Make sure that the heat-fixing unit is removed. (2) Remove the screw from the scanner grounding plate and take it off. (If the bottom plate has not been removed, remove front screw "c" also (see page IV-29) that secures both the scanner grounding plate and bottom
  • Brother International 8250P | Service Manual - Page 87
    1.22 EL (Eraser Lamp) Board Only when you need to replace the EL board (which is attached with double-sided adhesive tape), remove it according to the steps below. (1) Make sure that the EL board harness is disconnected from the high-voltage power supply PCB. (Refer to Section 1.15.) (2) Make sure
  • Brother International 8250P | Service Manual - Page 88
    1.23 Cleaning of High-voltage Contacts and Grounding Contacts If any toner particles, paper dust or dirt are on the contacts, clean them out. This will ensure that power flows correctly to enable printing. Grounding contacts High-voltage contacts IV - 44
  • Brother International 8250P | Service Manual - Page 89
    2. LUBRICATION Apply the specified lubricants to the lubrication points as shown below. Lubricant type (Manufacturer) Molykote EM-30LG or EM-30L (Dow Corning) Conductive grease FLOIL GE676 (Kanto Kasei Ltd.) Thin coat of grease (1 mm3) Lubricant amount Half of a rice-sized pinch of grease (3 mm3
  • Brother International 8250P | Service Manual - Page 90
    [ 2 ] Control panel locks [ 3 ] Scanner frame ASSY and separation roller gear IV - 46
  • Brother International 8250P | Service Manual - Page 91
    [ 4 ] Top cover lock spring [ 5 ] Gear drive unit IV - 47
  • Brother International 8250P | Service Manual - Page 92
    CHAPTER V. MAINTENANCE MODE
  • Brother International 8250P | Service Manual - Page 93
    CONTENTS 1. ENTRY INTO THE MAINTENANCE MODE V-1 2. LIST OF MAINTENANCE-MODE FUNCTIONS V-2 3. DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS V-4 3.1 EEPROM Parameter Initialization V-4 3.2 Printout of Scanning Compensation Data V-5 3.3 ADF Performance Test V-7 3.4 Test Pattern 1 V-8 3.5
  • Brother International 8250P | Service Manual - Page 94
    FAX2750/MFC4350/MFC4650/MFC6650MC: To make the equipment enter the maintenance mode, press the Function, *, 2, 8, 6, and 4 keys in this order. Within 2 seconds FAX-8250P/MFC-9050/MFC-9550: To make the equipment enter the maintenance mode, press the Menu, *, 2, 8, 6, and 4 keys in this order. Within
  • Brother International 8250P | Service Manual - Page 95
    2. LIST OF MAINTENANCE-MODE FUNCTIONS Function Code 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 32 55 74 82 87 91 99 Maintenance-mode Functions Function EEPROM Parameter Initialization Reference Subsection (Page) 3.1 (V-4) Printout of Scanning Compensation Data 3.2 (V-5) ADF* Performance Test
  • Brother International 8250P | Service Manual - Page 96
    which are shaded in the firmware switch tables in Subsection 3.5. The service personnel should instruct end users to follow the procedure given below. (1) FAX2750/MFC4350/MFC4650/MFC6650MC: Press the Function and Mode keys in this order. FAX-8250P/MFC-9050/MFC-9550: Press the Menu and Mode keys in
  • Brother International 8250P | Service Manual - Page 97
    the EEPROM areas, but entering 91 does not initialize some areas, as listed below. Data item Function code Maintenance-mode functions User switches Firmware switches Remote activation code Activity report Station ID data Outside line number Telephone function registration One-touch dialing Speed
  • Brother International 8250P | Service Manual - Page 98
    3.2 Printout of Scanning Compensation Data n Function The equipment prints out the white and black level data for scanning compensation. n Operating Procedure Do not start this function merely after powering on the equipment but start it after carrying out a sequence of scanning operation. Unless
  • Brother International 8250P | Service Manual - Page 99
    Scanning Compensation Data List V - 6
  • Brother International 8250P | Service Manual - Page 100
    3.3 ADF Performance Test n Function The equipment counts the documents fed by the automatic document feeder (ADF) and displays the count on the LCD for checking the ADF performance. n Operating Procedure (1) Set documents. (Allowable up to the ADF capacity.) The "DOC. READY" will appear on the LCD.
  • Brother International 8250P | Service Manual - Page 101
    3.4 Test Pattern 1 n Function This function, much like the copying function, prints out test pattern 1 to allow the service personnel to check for record data missing or print quality. n Operating Procedure Press the 0 and 9 keys in this order in the initial stage of the
  • Brother International 8250P | Service Manual - Page 102
    3.5 Firmware Switch Setting and Printout [ A ] Firmware switch setting n Function The facsimile equipment incorporates the following firmware switch functions (WSW01 through WSW36) which may be activated with the procedures using the control panel keys and buttons. The firmware switches have been
  • Brother International 8250P | Service Manual - Page 103
    -digit number is entered for double-digit firmware switch numbers, the equipment will automatically return to the initial stage of the maintenance mode. n Note The user-accessible selectors of the firmware switches are shaded in the tables given on the following pages. V - 10
  • Brother International 8250P | Service Manual - Page 104
    n Detailed Description for the Firmware Switches WSW01 (Dial pulse setting) Selector No. 1 2 3 4 5 6 7 8 Function Dial pulse generation mode Break time length in pulse dialing Inter-digit pause Switching between pulse (DP) and tone (PB) dialing, by the function switch Default dialing mode, pulse
  • Brother International 8250P | Service Manual - Page 105
    (PB) dialing This selector sets the default dialing mode (pulse dialing or tone dialing) which may be changed by the function switch. If the user switches it with the function switch when selector 7 is set to "0," the setting specified by this selector will also be switched automatically. Selector
  • Brother International 8250P | Service Manual - Page 106
    of cycles specified by these selectors, the equipment interprets CNG as an effective signal and then starts FAX reception. Selector No. 1 No. 5 0 (A) 0 (A) 1 (B) 1 (B) 0 (A) 1 (B) 0 (A) 1 (B) Cycle 0.5 cycle 1.0 cycle 1.5 cycles 2.0 cycles l Selectors 2 through 4: Min. detection time length of
  • Brother International 8250P | Service Manual - Page 107
    l Selectors 6 and 7: Dial tone detection in PABX These selectors activate or deactivate the dial tone detection function which detects a dial tone when a line is connected to the PABX. Setting both of these selectors to "1" activates the dial tone detection function so that the equipment starts
  • Brother International 8250P | Service Manual - Page 108
    80 ms : 110 ms : 250 ms : 500 ms NOTE: Selectors 1 and 5 through 8 are not applicable in those countries where no transfer facility is supported. NOTE: Selectors 2 through 4 are applicable to those models equipped with a built-in TAD. l Selector 1: Earth function in transfer facility This selector
  • Brother International 8250P | Service Manual - Page 109
    function so that the equipment starts dialing upon detection of a dial tone when a line is connected. (However, in those countries which support no dial tone detection function, e.g., in the U.S.A., setting these selectors to "1" makes the equipment start dialing after a WAIT of 3.5 seconds.) For
  • Brother International 8250P | Service Manual - Page 110
    l Selectors 5 and 6: Busy tone detection in automatic sending mode These selectors determine whether or not the equipment automatically disconnects a line upon detection of a busy tone in automatic sending mode. Setting selector 6 to "0" ignores a busy tone so that the equipment does not disconnect
  • Brother International 8250P | Service Manual - Page 111
    ms 1.5 sec. 2.0 sec. 2.5 sec. 0: Once 1: Twice 0: 30 ms 1: 50 ms NOTE: Selectors 4 through 8 are not applicable in those countries where no dial tone detection is supported, e.g., U.S.A. V - 18
  • Brother International 8250P | Service Manual - Page 112
    by selectors 1 through 3 (Setting 101, 110, or 111). This function does not apply in those countries where no dial tone detection function is supported. l Selector 7: No. of 2nd dial tone detection times This selector sets the number of dial tone detection times required for starting dialing
  • Brother International 8250P | Service Manual - Page 113
    30 ms 1: 50 ms NOTE: Selectors 1, 2, 4 through 7 are not applicable in those countries where no dial tone or line current detection is supported, e.g., U.S.A. l Selectors 1 and 2: Frequency band range These selectors set the frequency band for the 1st dial tone and the busy tone (before dialing
  • Brother International 8250P | Service Manual - Page 114
    -30 dBm -33 dBm -36 dBm -39 dBm -42 dBm NOTE: The WSW08 is not applicable in those countries where no dial tone detection is supported, e.g., U.S.A. l Selectors 1 through 3: 1st dial tone detection time length Upon detection of the 1st dial tone for the time length set by these selectors, the
  • Brother International 8250P | Service Manual - Page 115
    : Selectors 1 through 6 are not applicable in those models which do not support ECM. l Selector 1: Frame length selection Usually a single frame consists of is set to "0," the equipment may use non-standard commands (the machine's native-mode commands, e.g., NSF, NSC, and NSS) for communications.
  • Brother International 8250P | Service Manual - Page 116
    Selector No. 1 2 3 4 5 6 7 8 WSW10 (Protocol definition 2) Function Setting and Specifications Switching of DPS, following the CML ON/OFF Time length from transmission of the last dial digit to CML ON Time length from CML ON to CNG transmission Time length from CML ON to CED transmission (except
  • Brother International 8250P | Service Manual - Page 117
    1: 110-410/320-550 ms 1: 100-660/100-660 ms NOTE: WSW11 is not applicable in those countries where no busy tone detection is supported. NOTE: The setting of WSW11 is effective only when selectors 5 and 6 of WSW05 are set to "0, 1" or "1, 1" (Busy tone detection). l Selectors 1 and 2: Frequency band
  • Brother International 8250P | Service Manual - Page 118
    WSW12 (Signal detection condition setting) Selector No. Function 1 Min. OFF time length of calling signal (Ci) 2 3 Max. OFF time length of calling signal (Ci) 4 5 Detecting time setting 6 7 Delay 8 Not used. Setting and Specifications No. 1 0 0 1 1 No. 3 0 0 1 1 No. 5 0 0 1 1 0: 2 0: 1:
  • Brother International 8250P | Service Manual - Page 119
    km 5.6 km -43 dBm -47 dBm -49 dBm -51 dBm 1: 8 dB 1: 4 dB 1: 2 dB 1: 1 dB The modem should be adjusted according to the user's line conditions. l Selectors 1 and 2: Cable equalizer These selectors are used to improve the pass-band characteristics of analogue signals on a line. (Attenuation in the
  • Brother International 8250P | Service Manual - Page 120
    selection These selectors are used to select the frequency band of calling signals for activating the AUTO ANS facility. In the French versions, if the user sets the PBX to OFF from the control panel, the setting made by selectors 1 and 2 will take no effect and the frequency's lower limit will
  • Brother International 8250P | Service Manual - Page 121
    Selector No. 1 2 3 | 6 7 8 WSW15 (REDIAL facility setting) Function Selection of redial interval No. of redialings Redialing for no response sent from the called terminal Not used. Setting and Specifications No. 1 0 0 1 1 No. 3 0 0 0 0 1 2 0: 1: 0: 1: 45 00 00 01 01 | 11 5 minutes 1 minute 2
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    Selector No. 1 2 3 | 6 7 8 WSW16 (Function setting 1) Function Not used. CCITT superfine recommendation Setting and Specifications 0: OFF 1: ON Not used. Max. document length limitation Stop key pressed during reception 0: 400 cm 0: Not functional 1: 90 cm 1: Functional l Selector 2: CCITT
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    Selector No. 1 2 3 4 5 6 7 8 WSW17 (Function setting 2) Function Off-hook alarm Power failure report output Calendar clock/prompt alternate display Calendar clock type Not used. Non-ring reception Not used. Setting and Specifications No. 1 0 0 1 0: 2 0: 1: X: ON No alarm Always valid Valid
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    Selector No. 1 2 3 4 5 6 7 8 WSW18 (Function setting 3) Function Not used. Detection enabled time for CNG and no tone Not used. Registration of station ID Tone sound monitoring Setting and Specifications No. 2 0 0 1 1 3 0: 1: 0: 1: 40 sec. 0 sec. 5 sec. 80 sec. (No detection) 0: No. 7 0 1 1
  • Brother International 8250P | Service Manual - Page 125
    or 14,400 bps will still only produce a set speed automatically reduced to 9600 bps. NOTE: Selector 8 is applicable only to those models that support 14,400 bps. l Selectors 1 through 6: First and last choices of transmission speed for fallback These selectors are used to set the MODEM speed range
  • Brother International 8250P | Service Manual - Page 126
    WSW20 (Overseas communications mode setting) Selector No. 1 2 3 4 5 6 7 8 Function Setting and Specifications EP* tone prefix 0: OFF 1: ON Overseas communications mode (Reception) 0: 2100 Hz 1: 1100 Hz Overseas communications mode (Transmission) 0: OFF 1: Ignores DIS once. No. 4 5 Min.
  • Brother International 8250P | Service Manual - Page 127
    Selector No. 1 | 5 6 7 8 WSW21 (TAD setting 1) Function Max. waiting time for voice signal Two-way recording Erasure of message stored in the memory after the message transfer Setting and Specifications No. 1 0 0 0 0 0 1 No. 6 0 0 1 1 2345 0000 0001 0010 0011 | 1000 | 1111 : No detection : 1
  • Brother International 8250P | Service Manual - Page 128
    to decide whether or not to interrupt the current call when a new call comes in. If Call Waiting Caller ID service is available in the area and the user subscribes to it, he/she can see information about his/her incoming call. l Selectors 5 through 8: Acceptable TCF bit error rate (%) Setting two
  • Brother International 8250P | Service Manual - Page 129
    WSW23 (Communications setting) Selector No. 1 2 3 4 5 6 7 8 Function Starting point of training check (TCF) Allowable training error rate Decoding error rate for transmission of RTN Issue of RTN at the occurrence of a pagination error Resolution level for reception Limitation of attenuation level
  • Brother International 8250P | Service Manual - Page 130
    l Selector 7: Resolution level for reception This selector determines whether the resolution should be limited at the start of reception in the sleep mode. l Selector 8: Limitation of attenuation level Setting this selector to "0" limits the transmitting level of the modem to 10 dB. This setting has
  • Brother International 8250P | Service Manual - Page 131
    Selector No. 1 2 3 4 5 | 7 8 WSW25 (TAD setting 3) Function Setting and Specifications Delay time for starting detection of voice signal Detection level for no voice signal Pause between paging number and PIN Not used. No. 1 0 0 1 1 No. 3 0 0 1 1 No. 5 0 0 0 0 1 1 1 1 2 0: 1: 0: 1: 4 0: 1: 0:
  • Brother International 8250P | Service Manual - Page 132
    of the facsimile equipment is set up for the British Telecom's caller ID service or its equivalent. Selector 2 takes effect only when selector 1 is set mode or via the facsimile equipment in F/T mode. l Selector 8: FAX reception after the time-out of pseudo ring backtones in F/T mode If
  • Brother International 8250P | Service Manual - Page 133
    quality level Sampling rate when the recording quality level is set to High Toner save mode Setting and Specifications 0: TEL key 1: TEL/POLLING key 0: Yes the recording quality level (this function can be accessed also by the user function 8-8). If it is set to "0" (Normal), the sampling rate
  • Brother International 8250P | Service Manual - Page 134
    Selector No. 1 | 3 4 | 6 7 8 WSW28 (Function setting 6) Function Transmission level of DTMF highband frequency signal Transmission level of DTMF low-band frequency signal Current available resolution in receiving Continuous Polling Setting and Specifications No. 1 2 3 000 : 001 : 010 : 011 : 100
  • Brother International 8250P | Service Manual - Page 135
    -in TAD. NOTE: Selector 7 is applicable to those versions supporting the caller ID service. Note that it is not applicable to the U.S.A. versions. NOTE IDs stored in the memory can be called up on the LCD by the user function 6-7 and then pressing the Start key when the desired caller ID is
  • Brother International 8250P | Service Manual - Page 136
    the line. l Selector 8: "CHANGE DRUM SOON" message This selector determines whether or not the "CHANGE DRUM SOON" message should appear on the LCD when the service life of the laser-sensitive drum in the laser unit will expire soon. V - 43
  • Brother International 8250P | Service Manual - Page 137
    if it is set to "1," the equipment records it at the size* specified according to the current paper size. (*The U.S.A. or Canadian versions allow the user to select the desired paper size from the control panel. According to the paper size setting, the equipment determines the reduction rate. Other
  • Brother International 8250P | Service Manual - Page 138
    Selector No. 1 | 4 5 6 7 8 WSW32 (Function setting 10) Function Setting and Specifications Not used. Default resolution Default contrast No. 5 6 00: 01: 10: 11: No. 7 8 0 X: 10: 11: Standard Fine Super fine Photo Automatic Super light Super dark l Selectors 5 and 6: Default resolution These
  • Brother International 8250P | Service Manual - Page 139
    WSW33 (Function setting 11) Function Detection threshold level for voice signals inputted via the telephone line in the built-in TAD operation FAX receiving speed to be kept within the transmission speed limit to the PC Report output of polled transmission requests Comfortable noise level Setting
  • Brother International 8250P | Service Manual - Page 140
    WSW34 (Function setting 12) Selector No. 1 | 3 4 5 6 7 8 Function Setting and Specifications Erasing time length of ICM tone recorded preceding the tone detection starting point in the case of automatic line disconnection due to no voice signal received No. of CNG cycles to be detected (when the
  • Brother International 8250P | Service Manual - Page 141
    Selector No. 1 | 4 5 | 8 WSW35 (Function setting 13) Function Detection time length of the disconnection tone in ICM recording Setting and Specifications No. 1 0 0 0 0 1 234 000: 001: 010: 100: | 111: No detection 1 sec. 2 sec. 4 sec. | 15 sec. Not used. NOTE: Selectors 1 through 4 are
  • Brother International 8250P | Service Manual - Page 142
    regard them as noise and interpret that detecting state as being normal, allowing the ringer to keep sounding (until the equipment starts automatic reception of FAX data if in the FAX mode or enters the TAD mode if set in the TEL mode, according to the preset number of ringers). V - 49
  • Brother International 8250P | Service Manual - Page 143
    [ B ] Printout of firmware switch data n Function The equipment prints out the setting items and contents specified by the firmware switches. n Operating Procedure (1) Press the 1 key twice in the initial stage of the maintenance mode. The "PRINTING" will appear on the LCD. (2) The equipment prints
  • Brother International 8250P | Service Manual - Page 144
    3.6 Operational Check of LCD n Function This function allows you to check whether the LCD on the control panel works normally. n Operating Procedure (1) Press the 1 and 2 keys in this order in the initial stage of the maintenance mode. The LCD shows (2) Press the Start key. Each time you press the
  • Brother International 8250P | Service Manual - Page 145
    FAX2750/FAX-8250P MFC4350/MFC4650/MFC-9050 Key & Button Entry Order (1) V - 52
  • Brother International 8250P | Service Manual - Page 146
    MFC6650MC/MFC-9550 FAX-8050P Key & Button Entry Order (2) V - 53
  • Brother International 8250P | Service Manual - Page 147
    ejection sensor, toner sensor, and hook switch sensor*) operate correctly. (*The FAX-8250P/MFC-9050 has no hook switch sensor.) In the FAX-8250P/MFC-9050 or the top cover, jam paper at the paper outlet, remove the toner cartridge, and lift up the handset), and then check that the indication on the
  • Brother International 8250P | Service Manual - Page 148
    3.9 CIS Scanner Area Setting n Function The equipment sets the CIS scanner area and stores it into the EEPROM. n Operating Procedure (1) Press the 5 key twice in the initial stage of the maintenance mode. The "SCANNER AREA SET," "BLACK LEVEL INIT," and "WHITE LEVEL INIT" will appear on the LCD in
  • Brother International 8250P | Service Manual - Page 149
    mode. The LCD shows the "MACHINE ERROR X X." (2) To stop problem, call the user's equipment at a remote location from your equipment. (2) If the line is connected, have the user perform the following: 1) FAX2750/MFC4350/MFC4650/MFC6650MC: Press the Function, Mode, and 0 keys in this order. FAX-8250P
  • Brother International 8250P | Service Manual - Page 150
    cancel the memory security mode. Use this procedure if the user forgets his/her password entered when setting the memory security mode NOTE: Carrying out this procedure will lose passwords previously entered but retain FAX messages and ICM received in the memory security mode. n Operating Procedure
  • Brother International 8250P | Service Manual - Page 151
    CHAPTER VI. ERROR INDICATION AND TROUBLESHOOTING
  • Brother International 8250P | Service Manual - Page 152
    LCD VI-1 [ 2 ] Error codes shown in the "MACHINE ERROR X X" message VI-4 1.2 Communications Errors VI-6 2. TROUBLESHOOTING VI-13 2.1 Introduction...VI-13 2.2 Precautions...VI-13 2.3 Checking prior to Troubleshooting VI-13 2.4 Troubleshooting Procedures VI-14 [ 1 ] Control panel related VI-14
  • Brother International 8250P | Service Manual - Page 153
    user or the service personnel promptly locate the cause of a problem mode and then press the 8 and 2 keys). Following the MACHINE ERROR, one of the error codes listed in [ 2 ] will the LCD Messages on the LCD CHECK PAPER COVER OPEN PRINTER JAM DOCUMENT JAM Probable Cause Even after paper pulling-in
  • Brother International 8250P | Service Manual - Page 154
    is not enough toner. TONER EMPTY The toner sensor has detected that there is no toner. If this message appears, recording is no longer possible. SET CARTRIDGE The toner sensor has detected that no toner cartridge is loaded. COOLING DOWN PLEASE WAIT (Appear alternately.) MACHINE ERROR XX PRESS
  • Brother International 8250P | Service Manual - Page 155
    appears, open and close the top cover. The message may disappear if opening/closing the top cover removes the error. If the error persists, the "MACHINE ERROR X X" will appear instead of this message. If only an alarm beep is heard without any message on the LCD when the equipment is powered
  • Brother International 8250P | Service Manual - Page 156
    in the "MACHINE ERROR X X " message Error Code X X (Hex.) ( 71 ( 72 ( 73 ( 74 ( 75 ( 76 ( 77 ( 78 ( 79 ( 80 ( 82 ( 83 ( 84 ( 88 ( A1 ( A2 ( A3 ( A4 ( A7 ( A8 ( A9 ( AC Error factor Laser scanner motor does not lock. ) Cannot detect Beam Detect signal. ) No toner cartridge loaded. ) Toner empty
  • Brother International 8250P | Service Manual - Page 157
    -back not started. EOL not found in page memory transmission mode. ) PC interface error. ) Error codes in parentheses do not appear in the "MACHINE ERROR X X", since those errors are displayed as messages described in "[ 1 ] Error messages on the LCD." Those error codes appear in the communications
  • Brother International 8250P | Service Manual - Page 158
    1.2 Communications Errors If a communications error occurs, the facsimile equipment emits an audible alarm (intermittent beeping) for approximately 4 seconds, displays the corresponding error message, and prints out the transmission verification report if the equipment is in sending operation. VI -
  • Brother International 8250P | Service Manual - Page 159
    n Definition of Error Codes on the Communications List (1) Calling Code 1 10 11 11 11 11 11 11 11 Code 2 08 01 02 03 05 06 07 10 Causes Wrong number called. No dial tone detected before start of dialing. Busy tone detected before dialing. 2nd dial tone not detected. No loop current detected.*
  • Brother International 8250P | Service Manual - Page 160
    terminal. 32 14 The available memory space of the remote terminal is less than that required for reception of the confidential or relay broad- casting instruction. VI - 8
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    (4) Instructions received from the remote terminal [checking the NSC, DTC, NSS, and DCS] Code 1 40 40 Code 2 02 03 Causes Illegal coding system requested. Illegal recording
  • Brother International 8250P | Service Manual - Page 162
    (6) ID checking Code 1 63 63 63 63 63 63 Code 2 01 02 03 04 05 06 Causes Password plus "lower 4 digits of telephone number" not coincident. Password not coincident. Polling ID not coincident. Entered confidential mail box ID uncoincident with the mail box ID. Relay broadcasting ID not coincident.
  • Brother International 8250P | Service Manual - Page 163
    (9) Signal isolation Code 1 90 Code 2 01 90 02 Causes Unable to detect video signals and commands within 6 seconds after CFR is transmitted. Received PPS containing invalid page count or block count. (10) Video signal reception Code 1 A0 Code 2 03 A0 11 A0 12 A0 13 A0 14 A0 15 A0
  • Brother International 8250P | Service Manual - Page 164
    (12) Maintenance mode Code 1 E0 E0 Code 2 01 02 Causes Failed to detect 1300 Hz signal in burn-in operation. Failed to detect PB signals in burn-in operation. (13) Equipment error Code 1 FF Code 2 X X Causes Equipment error (For X X, refer to Section 1.1 [ 2 ].) VI - 12
  • Brother International 8250P | Service Manual - Page 165
    the troubleshooting procedures, so this section covers some sample problems. However, those samples will help service personnel pinpoint and repair other defective elements if he/she analyzes and examines them well. 2.2 Precautions Be sure to observe the following to prevent the secondary troubles
  • Brother International 8250P | Service Manual - Page 166
    2.4 Troubleshooting Procedures [ 1 ] Control panel related Trouble (1) LCD shows nothing. (2) Control panel inoperative the control panel PCB l Control panel PCB l FPC key l Main PCB [ 2 ] Telephone related Trouble (1) No phone call can be made. (2) Speed dialing or one-touch dialing will not work.
  • Brother International 8250P | Service Manual - Page 167
    (1) No tone is transmitted. l Main PCB l NCU PCB Check: [ 4 ] Paper/document feeding related Trouble (1) Neither "COPY: PRESS COPY" nor "FAX: NO. & START" message appears although documents are set. (2) Document not fed. (3) Document double feeding (4) Recording paper not fed. Check: l Sensors
  • Brother International 8250P | Service Manual - Page 168
    copied image is normal, the problem may be due to the remote terminal; if it is abnormal, proceed to the following checks: Trouble (1) Completely blank Action to be taken At the scanner Check the following components: - CIS harness - Main PCB - CIS unit At the printer side l Clean the high-voltage
  • Brother International 8250P | Service Manual - Page 169
    Trouble (3) Light (4) Dark Action to be taken At the scanner Check the following components: - CIS unit - Main PCB At the printer side l Replace the toner cartridge with a new one and print 4 to 5 pages. If the problem persists, proceed to the next step. l Remove the toner cartridge and start
  • Brother International 8250P | Service Manual - Page 170
    Trouble (5) Black and blurred vertical stripes (6) Black and blurred horizontal stripes Action to be taken At the scanner Check the following components: - CIS unit At the printer side l Clean the paper path which may be contaminated with toner. l Slide the wire cleaner tab to clean the corona wire
  • Brother International 8250P | Service Manual - Page 171
    Trouble (9) Faulty image registration (Leading edge of image starts too late on paper) Action to be taken At the printer side l Instruct the user not to load paper exceeding the limit mark on the multi-purpose sheet feeder. l Instruct the user PCB At the printer side l Check that the laser unit is
  • Brother International 8250P | Service Manual - Page 172
    Shake the toner cartridge. If the problem persists, replace it. l Check that the equipment is placed on a flat surface. l Shake the drum unit from left to right and front to back. At the printer side l Replace the drum unit. l Replace the heat-fixing unit. At the printer side l Instruct the user to
  • Brother International 8250P | Service Manual - Page 173
    Location of High-voltage Contacts and Grounding Contacts Grounding Contacts High-voltage Contacts , • ƒ For transfer roller Drum unit „ For cleaner roller ... For grid ‡ For developer roller † For corona wire Gear drive unit Drum grounding board , • , High-voltage power supply PCB ƒ „ • VI -
  • Brother International 8250P | Service Manual - Page 174
    July '98 5X5301 • Printed in Japan
  • Brother International 8250P | Service Manual - Page 175
    FAX2750/FAX-8250P MFC4350/MFC4650/MFC6650MC MFC-9050/MFC-9550 LJ6106MFC/LJ6206MFC/L621 Appendix 1. EEPROM Customizing Codes
  • Brother International 8250P | Service Manual - Page 176
    /L621/LJ6106MFC/LJ6206MFC: To make the equipment enter the maintenance mode, press the Function, *, 2, 8, 6, and 4 keys in this order. Within 2 seconds FAX-8250P/MFC-9050/MFC-9550: To make the equipment enter the maintenance mode, press the Menu, *, 2, 8, 6, and 4 keys in this order. Within
  • Brother International 8250P | Service Manual - Page 177
    n EEPROM Customizing Codes List (1) FAX2750/MFC4350/MFC4650/MFC6650MC Versions U.S.A. CANADA ASIA AUSTRALIA INDONESIA GULF NEW ZEALAND TAIWAN S. AMERICA SOUDI ARABIA RUSSIA FAX2750 1001 0002 0040 0006 0040 0001 0027 0023 Model MFC4350 MFC4650 1101 1201 0102 0202 0201 MFC6650MC 1001 0002
  • Brother International 8250P | Service Manual - Page 178
    /MFC-9050/MFC-9550 Versions GERMANY U.K. FRANCE NORWAY BELGIUM NETHERLANDS SWITZERLAND IRELAND FINLAND DENMARK AUSTRIA SPAIN ITALY SWEDEN EURO GENERIC FAX-8250P 0003 0004 0005 0007 0010 0011 0013 0014 0026 Model MFC-9050 0103 0104 0105 0107 0108 0109 0110 0111 0112 0113 0114 0115 0116
  • Brother International 8250P | Service Manual - Page 179
    FAX2750/FAX-8250P MFC4350/MFC4650/MFC6650MC MFC-9050/MFC-9550 Appendix 2. Circuit Diagrams A. Main PCB B. Network Control Unit (NCU) PCB C. Control Panel PCB D. Power Supply PCBs
  • Brother International 8250P | Service Manual - Page 180
    FAX2750/FAX-8250P MFC4350/MFC4650/MFC6650MC MFC-9050/MFC-9550 Appendix 2. Circuit Diagrams A. Main PCB B. Network Control Unit (NCU) PCB C. Control Panel PCB D. Power Supply PCBs
  • Brother International 8250P | Service Manual - Page 181
    1 2 3 4 5 6 A S I C MF C 2 A +5V 74C 73B 71C RI NG TEL MU T E 76 RI NG 74 TEL 91 SEN3 93 SEN5 75 S P ON 122 P7 1 F AN1 S P ON RNG 55D 75B 75C 51C 44B 45C HAI SI MC E MR S T 94 SEN6 39 MC E 41 MR S T 65 PA3 29 P M1 30 P M2 MS I L P M1 P M2 55A 55A 55A 53B L OCK 1 1 3 PB5 18
  • Brother International 8250P | Service Manual - Page 182
    1 2 3 4 5 +5 B S0 V C9 3 +5 V S0 V CC1 0 4 R1 2 9 C7 3 CC1 0 4 C1 1 0 CC1 0 4 110 RAS0 12B +5V C4 10 A / 16V S0 V B +5V S0 V R6 1 R6 0 ABUS A1 A2 A3 A4 A5 A6 A7 A8 A9 A1 0 A1 1 A1 2 A1 3 A1 4 A1 5 A1 6 A1 7 A1 8 + 5 V R6 2 A1 9 * R6 4 0 +5V 37 46 27 VCC G G 25 A0 29 D0
  • Brother International 8250P | Service Manual - Page 183
    1 2 3 4 5 6 +24V P1 9 CI S 1 R1 8 3 10 1/ 4W +5V +5V R5 V R5 V C1 3 3 Q2 4 A 10 2 SC3 9 2 8 A L ED A C1 4 3 CC1 0 4 / 35V 2 SD1 8 5 8 Q2 R1 4 7 10K 13B S0 V ROV R8 8 300 S0 V S0 V 2 R2 1W 30 C1 1 6 CC1 0 4 S0 V R8 7 200 C7 7 CC1 0 4 R1 4 2 S0 V 470 CI SCL K 3
  • Brother International 8250P | Service Manual - Page 184
    1 2 3 4 5 6 S0 V +5V + - + - +5V R9 0 R8 9 0 B L M1 1 A 2 0 A A CC1 0 4 x 4 C8 C7 0 C5 6 C4 7 C6 0 M0 V M5 V B G3 0 8 0 / 2 1 6 V/ 1 0 S0 V 74B 43C RI N C8 4 CC1 0 4 AREF R9 7 39K R9 6 27K C8 1 R9 1 1 2 0 K 9 10 8 #10 KI 3 2 4 R9 2 4. 7K PRI NG 74C Z D2 HZ S5 C +
  • Brother International 8250P | Service Manual - Page 185
    1 2 3 4 5 6 P2 0 52045- 1245 () () #12 12 T ENSHAHL 3 T ENH 5 14B 8 +5V 12 +5V P5 T NR 1 +5V 3 #12 13 T ENL 4 T ENSHAL L 4 T NOR 15A 2 DT C1 1 4 YK C2 4 CC1 0 4 #14 BA 10339 +5V C2 8 P1 6 B6 B- PH 14B A 8 +24V 2 #12 11 14B VCL R 6 VCL NL 5 8 2 4 RET 1 R1 5
  • Brother International 8250P | Service Manual - Page 186
    14B 14B 14B 14C DC6 DC5 +5V D2 MA 7 0 0 R1 7 0 1K A A PPF2 7 5 0 MF C 4 3 5 0 MF C 4 6 5 0 ) ASSY MF C 9 0 5 0 MF C 6 6 5 0 MC MF C 9 5 5 0 FAX- 8 2 5 0 P ) NOT ASSY C1 5. 5V 473F S0 V B 6 8 1 DC4 5 5 4 DC3 RVDD 16A 4 6 3 RA1 0 DC2 100x4 R1 7 1 3 7 2 DC1 0 +5V +5v
  • Brother International 8250P | Service Manual - Page 187
    NOT ASSY V OL 3 Q1 4 DT C1 1 4 YK 15C V OL 2 3 M0 V 4 2 MOV Q1 5 U MG5 N f o r Eu r o p i a n NCU A * R1 1 6 DASEND ( MF C9 0 5 0 A FAX- 8 2 5 0 P M0 V 5 12A MF C 9 5 5 0 A * C1 0 5 R1 9 6 D D A S0 V S0 V * R1 1 5 DAST 4 12A A * C1 0 4 R1 9 7 NCU2 P1 3 B6 B- PH S0 V S0
  • Brother International 8250P | Service Manual - Page 188
    R3 4 R3 5 R3 6 R3 7 R3 8 R4 1 , R7 4 R7 6 R7 9 R8 0 C 2 PPF2 7 5 0 MF C 4 3 5 0 MF C 4 6 5 0 3 MF C 4 3 5 0 D E MO MF C 4 6 5 0 D E MO MF C 6 6 5 0 MC 4 MF C 9 0 5 0 FAX- 8 2 5 0 P B 4 B B B I C S OCK E T 0 NOT A S S Y 5 MF C 9 5 5 0 6 A B C D D A Main PCB 8/8 1 2 3 4 5 6
  • Brother International 8250P | Service Manual - Page 189
    1 2 3 4 5 6 A 3 . C OMP ON E N T S I N P A R E N T H E S I S N OT T O B E MOU N T E D . RA3 5 1 x 2 3 +26V C ML CR1 MZ F - 2 4 H G or OUA Z - S S - 1 2 4 D 4 4 + SBT0 2 6 0 x 2 or F L 5 R2 0 0 PNx 2 or FG FG - DL - 6 5 0 3 Cx 2 PL S 4 1 B 4 3 SBT0 2 6 0 x 2 or F L 5 R2 0 0 PNx
  • Brother International 8250P | Service Manual - Page 190
    + - + + - + - 1 ( ) 2 A - OUT S A E L I NE CH2 L 2 J P9 ( C) F L 5 R2 0 0 PN X2 4 7 3 1 + 5 T E L OF F 6 J W9 ( 5) C JW 2 25 ( 1 0 )C J P8 ( C) C C + 1 - M E B ( ) M () B * * M B M() B( ) 12 F L 5 R2 0 0 PN L5 E + - B PL S 1 4 C ML 2 3 F L 5 R2 0 0 PN L7
  • Brother International 8250P | Service Manual - Page 191
    1 2 3 4 5 6 A A UG4 5 8 5 - 0 X X I TEM PH3 - - T L P 6 2 0 GR T L P 6 2 0 GR - - - - L1 DRL - 0 0 3 3 P DRL - 0 0 3 3 P 5 mm J U MP E R 5 mm J U MP E R 5 mm J U MP E R 5 mm J U MP E R 5 mm J U MP E R 5 mm J U MP E R C8 - - PC2 5 0 B1 0 5 PC2 5 0 B1 0 5 - - - -
  • Brother International 8250P | Service Manual - Page 192
    + - + + - + - 1 2 3 ) ( ) A - OUT ( ) S A E L I NE CH2 L 2 J P9 ( C) F L 5 R2 0 0 PN X2 4 7 3 1 + 5 T E L OF F 6 J W9 ( 5) C JW 2 25 ( 1 0 )C J P8 ( C) C C + 1 - M E B ( ) M B () () ) M ( B M() B( ) 12 ( F L 5 R2 0 0 PN L5 E + - B PL S 1 4 C ML 2
  • Brother International 8250P | Service Manual - Page 193
    1 2 3 4 5 A UG4 5 8 8 - 0 X X I TEM PH3 - - - - - - - T L P 6 2 0 GR SP2 ASSY ASSY ASSY - - - ASSY ASSY SP4 ASSY ASSY ASSY - - - ASSY ASSY SP6 ASSY ASSY - - - - ASSY ASSY SP7 - - - ASSY - - - - SP9 ASSY - - ASSY - ASSY ASSY ASSY SP1 0 -
  • Brother International 8250P | Service Manual - Page 194
    + - + + - + - 1 S A E L I NE CH2 L5 ( ) B F L 5 R2 0 0 PN 2 A - OUT 4 . 3 V X2 L 2 J P9 ( C) 4 + - 7 5 T E L OF F M 3 6 J W9 E ( 5) C B JW 1 2 25 M ) ( 1 0 )C B J P8 ( C) M () ( C B M( ) C B( ) + - 12 1 + - E C ML PL S 1 4 2 3 F L 5 R2 0 0 PN L7
  • Brother International 8250P | Service Manual - Page 195
    S G- 2 6 7 ( REAR) K E 2 4 S GND 1 3 A C PH2 S G- 2 6 7 ( F RONT ) K E 2 4 S GND D +5V S L R - 3 4 MG8 0 F 620 C S L R - 3 4 MG8 0 F 620 S L R - 3 4 MG8 0 F S L R - 3 4 MG8 0 F 620 620 SL R- 3 4 2 VR 620 D C Control Panel 1/2 (FAX2750/FAX-8250P) 1 2 3 4 5 6
  • Brother International 8250P | Service Manual - Page 196
    1 2 3 4 +5V R1 9 100K A +5V P1 52089- 1520 R1 0 R9 R1 1 R1 6 R1 5 R1 3 47K 47K 47K 47K 47K 47K KI 0 14 KI 1 12 KI 2 10 KI 3 8 KI 4 6 KI 5 4 KI 6 2 R1 2 47K P3 53025- 0610 P4 53025- 0810 B 4 5 3 2 1 6 +5V 4 S GND 5 S DOUT 3 SDI N 2 PCL K 1 RSEN 6 MI C + 7 MI C 8 C1 100 R2 4 1 0
  • Brother International 8250P | Service Manual - Page 197
    1 2 3 4 5 6 Y L 2 P A N E L K E Y MA T R I X R E F E R E N C E T A B L E 1 K E Y NO. A 1 Func t i on 2 3 SET 4 5 Cl e a r 6 7 8 1 0 KEY- 2 9 1 0 KEY- 3 10 11 B 12 13 14 15 16 17 18 19 20 21 22 C 23 24 25 26 27 28 29 30 31 32 33 34 D 35 36 K E Y COE
  • Brother International 8250P | Service Manual - Page 198
  • Brother International 8250P | Service Manual - Page 199
  • Brother International 8250P | Service Manual - Page 200
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FACSIMILE EQUIPMENT
SERVICE MANUAL
MODEL: FAX2750/FAX-8050P/FAX-8250P
MFC4350/MFC4650/MFC6650MC/
MFC-9050/MFC-9550