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Brother DCP7010 Service Manual
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Brother DCP7010 Service Manual

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FACSIMILE EQUIPMENT
SERVICE MANUAL
MODELS:
MFC7420/7820N
DCP7010/7020/7025
Confidential

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Summary of Contents for Brother DCP7010

  • Page 1 FACSIMILE EQUIPMENT SERVICE MANUAL MODELS: MFC7420/7820N DCP7010/7020/7025 Confidential...
  • Page 2 © Copyright Brother 2004 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. Confidential...
  • Page 3 PREFACE This Service Manual is intended for use by service personnel and details the specifications, construction, theory of operation, and maintenance for the Brother machines noted on the front cover. It includes information required for troubleshooting and service--disassembly, reassembly, and lubrication--so that service personnel will be able to understand equipment function, repair the equipment in a timely manner and order spare parts as necessary.
  • Page 4 CHAPTER 8 MAINTENANCE MODE Describes the maintenance mode which is exclusively designed for the purpose of checks, settings and adjustments using the keys on the control panel. In the maintenance mode, you can update memory (EEPROM: electrically erasable programmable read-only memory) contents for optimizing the drive conditions of the head/carriage unit, paper feed roller or paper ejection roller (if they have been replaced) or for setting the CIS scanner area, for example.

  • Page 5: Table Of Contents

    TABLE OF CONTENTS CHAPTER 1 PARTS NAMES & FUNCTIONS EQUIPMENT OUTLINE.....................1-1 CONTROL PANEL ....................1-2 COMPONENTS ......................1-4 CHAPTER 2 SPECIFICATIONS GENGERAL.......................2-1 2.1.1 General Specifications ..................2-1 2.1.2 Paper Specifications.....................2-2 2.1.3 Printable Area ........................ 2-4 SPECIFICATIONS LIST ....................2-8 CHAPTER 3 THEORY OF OPERATION OVERVIEW........................3-1 MECHANICAL COMPONENTS ................3-2 3.2.1...
  • Page 6 CHAPTER 5 DISASSEMBLY/REASSEMBLY AND LUBRICATION DISASSEMBLY/REASSEMBLY ................5-1 Safety Precautions ......................5-1 Tightening Torque......................5-2 Preparation ........................5-3 How to Access the Object Component .................5-3 Disassembly Flowchart ....................5-4 5.1.1 AC Cord........................5-5 5.1.2 Drum/Toner ASSY....................5-5 5.1.3 Paper Tray......................5-6 5.1.4 Rear Cover ......................5-7 5.1.5 Rear Chute Cover ....................5-8 5.1.6 Side Cover L......................5-9 5.1.7...
  • Page 7 5.1.24 Tail Edge Actuator....................5-58 5.1.25 Regist Front Actuator/Regist Front Spring ............5-58 5.1.26 Regist Sensor PCB ASSY..................5-59 5.1.27 Regist Rear Actuator/Regist Rear Spring............5-59 5.1.28 Fan Motor 60 Unit....................5-60 5.1.29 Toner LED PCB ASSY/LED Holder ..............5-61 5.1.30 New Toner Actuator/New Toner Actuator Spring..........5-62 5.1.31 New Toner Sensor .....................5-62 5.1.32 Cover Sensor .....................5-63 5.1.33 Toner Sensor PCB ASSY...................5-63...
  • Page 8 CHAPTER 7 CLEANING CHAPTER 8 MAINTENANCE MODE ENTRY INTO THE MAINTENANCE MODE .............8-1 LIST OF MAINTENANCE MODE FUNCTIONS............8-2 USER-ACCESS TO THE MAINTENANCE MODE ...........8-3 DETAILED DESCRIPTION OF MAINTENANCE MODE FUNCTIONS ....8-4 8.4.1 EEPROM Parameter Initialization (Function code 01/91) ........8-4 8.4.2 Printout of Scanning Compensation Data (Function code 05) ......8-5 8.4.3 Placement of CIS Unit in Position for Transportation (Function mode 06) ..8-7...
  • Page 9 CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING ERROR INDICATION ....................9-1 9.1.1 Equipment Errors ....................9-1 [ 1 ] Error messages appearing on the LCD ............9-1 [ 2 ] Error codes shown in the "MACHINE ERROR X X" messages....9-5 9.1.2 Communications Errors..................9-11 TROUBLESHOOTING ....................9-15 9.2.1 Introduction......................9-15 9.2.2...
  • Page 10 APPENDIX 6 CIRCUIT DIAGRAMS NCU PCB: MFC7420 (U.S.A. and CANADA models) NCU PCB: MFC7820N (U.S.A. and CANADA models) NCU PCB: MFC7420 (EUROPE models) NCU PCB: MFC7820N (EUROPE models) Power Supply PCB 100V (U.S.A. and CANADA models) Power Supply PCB 200V (EUROPE models) Confidential viii...

  • Page 11: Safety Precautions

    SAFETY PRECAUTIONS To use the MFC safely Please keep these instructions for later reference and read them before attempting any maintenance. NOTE: If there are faxes in the MFC's memory, you need to print them or save them before you turn off the power and unplug the MFC.
  • Page 12 WARNING When you move the MFC, grasp the side hand holds that are under the scanner. DO NOT carry the MFC by holding it at the bottom. Use caution when installing or modifying telephone lines. Never touch telephone wires or terminals that are not insulated unless the telephone line has been disconnected at the wall jack.

  • Page 13: Choosing A Location

    CHOOSING A LOCATION Place your MFC on a flat, stable surface that is free of vibration and shocks, such as a desk. Put the MFC near a telephone wall jack and a standard, grounded AC power outlet. Choose a location where the temperature remains between 50°F and 90.5°F (10°C and 32.5°C).

  • Page 14: Chapter 1 Parts Names & Functions

    CHAPTER PARTS NAMES & FUNCTIONS Confidential...
  • Page 15 CHAPTER 1 PARTS NAMES & FUNCTIONS This chapter contains external views and names of components and describes their functions. Information about the keys on the control panel is included to help you check operation or make adjustments. CONTENTS EQUIPMENT OUTLINE ....................1-1 CONTROL PANEL......................1-2 COMPONENTS........................1-4 Confidential...

  • Page 16: Equipment Outline

    1.1 EQUIPMENT OUTLINE Front view Automatic Document Feeder (ADF) ADF Document Output Support Flap Control Panel Face-down Output Tray Support Flap with Extension (Support Flap) Document Cover Manual Feed Slot Power Switch Front Cover Paper Tray Rear view AC Power Connector Back Cover USB Interface Connector Parallel Interface Connector...

  • Page 17: Control Panel

    1.2 CONTROL PANEL MFC-7420 and MFC-7820N have similar control keys. 1. One-Touch Keys 6. Dial Pad Keys These 4 keys give you instant access to 8 previously Use these keys to dial telephone or fax numbers and as a stored numbers. keyboard for entering information into the MFC.
  • Page 18 5. Navigation Keys 11. Copy Keys (Temporary settings) Menu/Set Enlarge/Reduce The same key is used for Menu and Set operations. Lets Lets you reduce or enlarge copies depending upon the you access the Menu to program and store your settings ratio you select.

  • Page 19: Components

    1.3 COMPONENTS The equipment consists of the following major components: ADF Unit Panel Unit NCU PCB Scanner Unit Inner Chute Speaker ASSY Joint Cover ASSY Rear Chute Cover Laser Unit Rear Cover Side Cover R Fixing Unit Battery ASSY PS PCB Unit Main PCB Frame Unit Front Cover...

  • Page 20: Chapter 2 Specifications

    CHAPTER SPECIFICATIONS Confidential...

  • Page 21: Specifications List

    CHAPTER 2 SPECIFICATIONS This chapter lists the specifications of each model, which enables you to make a comparison of different models. CONTENTS GENERAL ........................2-1 2.1.1 General Specifications ..................2-1 2.1.2 Paper Specifications.....................2-2 2.1.3 Printable Area ........................ 2-4 SPECIFICATIONS LIST....................2-8 Confidential...

  • Page 22: General Specifications

    2.1 GENERAL 2.1.1 General Specifications Memory Capacity 16 MB (MFC-7420), 32 MB (MFC-7820N) Automatic Document Feeder (ADF) Up to 35 sheets Paper Tray 250 Sheets (20 lb (75 g/m 2 )) Printer Type Laser Print Method Electrophotography by semiconductor laser beam scanning Liquid Crystal Display (LCD) 16 characters x 2 lines...

  • Page 23: Paper Specifications

    2.1.2 Paper Specifications (1) Paper type Manual feed Select the paper type from the Paper type Tray1 slot printer driver Plain paper Plain paper 60 g/m to 105 g/m (16 to 28 lbs.) Recycled paper Recycled paper Bond paper Bond paper Thick paper Thick paper or Thicker paper 105 g/m...
  • Page 24 (4) Recommended paper Europe Plain paper Xerox Premier 80 g/m Xerox 4200DP 20lb Xerox Business 80 g/m Xerox 4024 28lb Modo Paper DATACOPY 80 g/m Hammermill Laser Paper 24lb IGEPA X-press 80 g/m Recycled paper Xerox Recycled Supreme Transparency 3M CG3300 3M CG 3300 Label Avery laser label L7163...

  • Page 25: Printable Area

    2.1.3 Printable Area When using PCL emulation, the edges of the paper that cannot be printed on are shown below. Portrait Physical page Printable area Logical page Physical page length Maximum logical page length Distance from edge of physical page to edge of logical page NOTE: “Logical page”...
  • Page 26 The table below shows the printable areas when printing on Portrait for each paper size. Size 215.9 mm 279.4 mm 203.2 mm 279.4 mm 6.35 mm 4.2 mm Letter 8.5” 11.0” 8.0” 11.0” 0.25” 0 mm 0.16” (2,550 dots) (3,300 dots) (2,400 dots) (3,300 dots) (75 dots)
  • Page 27 Landscape Physical page Printable area Logical page Physical page length Maximum logical page length Distance from edge of physical page to edge of logical page NOTE: “Logical page” shows the printable area for a PCL driver. “Printable area” shows mechanical printable area of the machine. Therefore, the machine can only print within the shaded area when you use a PCL driver.
  • Page 28 The table below shows the printable areas when printing on Landscape for each paper size. Size 279.4 mm 215.9 mm 269.3 mm 215.9 mm 5.0 mm 4.2 mm Letter 11.0” 8.5” 10.6” 8.5” 0.2” 0 mm 0.16” (3,300 dots) (2,550 dots) (3,180 dots) (2,550 dots) (60 dots)

  • Page 29: Specifications List

    2.2 SPECIFICATIONS LIST MFC7420/7820N (1/15) ALL-FB1 ALL-FB2 US/Canada Europe Asia/Pacific US/Canada Europe Asia/Pacific MFC-7420 MFC-7820N Model Name GENERAL Print Engine Laser ( ALL) Laser ( ALL) SparcLite 133MHz SparcLite 133MHz CPU Speed 2hours Yes (up to 4 days) Back up Clock 10 - 32.5 degrees Centigrade 10 - 32.5 degrees Centigrade Operating Environment Temperature...
  • Page 30 (2/15) ALL-FB1 ALL-FB2 US/Canada Europe Asia/Pacific US/Canada Europe Asia/Pacific MFC-7420 MFC-7820N Model Name GENERAL 120V AC 120V AC 220-240V AC 50/60Hz 220-240V AC 50/60Hz Power Source 50/60 50/60 (Canada)Hz (Canada)Hz 460W 460W Power Consumption (Copying) Power Consumption AVERAGE 10W/75W/1032W AVERAGE 10W/75W/1032W (Sleep/Standby/Peak) Power Save ( CPU Sleep ) Sleep Mode (00-99min : w/ OFF...
  • Page 31 HK only) HK only) 14.400bps (Fax) 33.600bps (Fax) Modem Speed Approx. 6sec. (ITU-T #1 & Approx. 2sec. (ITU-T #1 & Brother#1,JBIG) Transmission Speed Brother#1,MMR) ITU-T Group Super G3 MH / MR / MMR MH / MR / MMR / JBIG...
  • Page 32 400 pages (ITU-T Test Chart, up to 500 pages (ITU-T Test Chart, Standard Resolution, MMR) Standard Resolution, JBIG) Memory Transmission (ITU-T Chart) up to 500 pages ((Brother #1Chart, up to 600 pages ((Brother #1Chart, Standard Resolution, MMR) Standard Resolution, JBIG) ECM (Error Correction Mode)
  • Page 33 (5/15) ALL-FB1 ALL-FB2 US/Canada Europe Asia/Pacific US/Canada Europe Asia/Pacific Model Name MFC-7420 MFC-7820N INTERFACE Cable included Acceptable Media Card Slot PRINTER Mono Mono Color/Mono Laser (ALL) Laser (ALL) Engine Type HQ1200 (2400x600dpi) HQ1200 (2400x600dpi) Resolution up to 20ppm up to 20ppm up to 20ppm (A4 size) up to 20ppm (A4 size) Speed(ppm)
  • Page 34 Windows) Printer Driver TWAIN (WIA for XP) Viewer (PaperPort 9.0) Control Center PC Fax Send : Fax Share Software by Brother PC Fax Receive (Parallel & USB only) Yes (USB/Parallel only) Yes (USB/Parallel only) Remote Setup BRAdmin Professional (*5) Confidential...
  • Page 35 TELNET, SNMP, HTTP, TFTP, ARP,RARP, BOOTP, DHCP, APIPA (Auto IP), WINS/NetBIOS, DNS, Support Protocols LPR/LPD, Custom Raw Port/Port9100, POP3/SMTP, IPP, FTP, mDNS BRAdmin Professional Web Based Management Network Management MIB-II as well as Brother private MIB Confidential 2 - 1 4...
  • Page 36 (8/15) ALL-FB1 ALL-FB2 US/Canada Europe Asia/Pacific US/Canada Europe Asia/Pacific MFC-7420 MFC-7820N Model Name Optional NETWORK (*6) NC-2100P (Parallel external print server) / NC-2100P (Parallel external print server) / Model Name NC-2200w (Wireless USB server) NC-2200w (Wireless USB server) NC-2100 : Yes / NC-2200w : Yes NC-2100 : Yes / NC-2200w : Yes Share Printer NC-2100 : No / NC-2200w : Yes...
  • Page 37 DCP7010/7020/7025 (9/15) ALL-DCP1 ALL-DCP2 Europe US/Canada Europe Asia/Pacific DCP-7010 DCP-7025 Model Name DCP-7020 GENERAL Print Engine Laser ( ALL) Laser ( ALL) CPU Speed SparcLite 133MHz SparcLite 133MHz Back up Clock 10 - 32.5 degrees Centigrade 10 - 32.5 degrees Centigrade...
  • Page 38 (10/15) ALL-DCP1 ALL-DCP2 Europe US/Canada Europe Asia/Pacific Model Name DCP-7020 DCP-7010 DCP-7025 GENERAL 120V AC 220-240V AC 50/60Hz 220-240V AC 50/60Hz Power Source 50/60 (Canada)Hz 460W 460W Power Consumption (Copying) Power Consumption 10W/75W/1032W 10W/75W/1032W (Sleep/Standby/Peak) Power Save ( CPU Sleep ) Sleep Mode (00-99min : w/ OFF mode) Energy Star Compliant ( USA Only )
  • Page 39 (11/15) ALL-DCP1 ALL-DCP2 Europe US/Canada Europe Asia/Pacific DCP-7010 DCP-7025 Model Name DCP-7020 TELEPHONE Telephone Index (Search) Pre-registered for FAX BACK SYSTEM ( USA ) Caller ID Call Waiting Caller ID Call waiting Ready ( Only for USA ) Distinctive Ringing N / A N / A Modem Speed...
  • Page 40 (12/15) ALL-DCP1 ALL-DCP2 Europe US/Canada Europe Asia/Pacific DCP-7010 DCP-7025 Model Name DCP-7020 N / A N / A Polling Receiving Auto Reduction Duplex Fax Receive Out-of-Paper Reception (ITU-T Chart) PC Fax LIST/REPORT Activity Report/Journal Report Transmission Verification Report Cover page Help List Call Back Message Caller ID List...
  • Page 41 (13/15) ALL-DCP1 ALL-DCP2 Europe US/Canada Europe Asia/Pacific Model Name DCP-7020 DCP-7010 DCP-7025 PRINTER Yes (35 True type Fonts) Yes (35 True type Fonts) Fonts Disk Based LTR, LGL, LTR, A4, B5, LTR, LGL, LTR, A4, B5, A5, Paper Handling Size A4, B5, A5, A4, B5, A5, B6, A6, EXE...
  • Page 42 BUNDLED SOFTWARE (For MAC) Printer Driver TWAIN Viewer (PageManager) Control Center PC Fax (Sending only by Brother) PC FAX Receive Remote Setup Mac OS 9.1 - 9.2, Mac OS X 10.2.4 or Mac OS 9.1 - 9.2, Mac OS X 10.2.4 or...
  • Page 43 (15/15) ALL-DCP1 ALL-DCP2 Europe US/Canada Europe Asia/Pacific DCP-7010 DCP-7025 Model Name DCP-7020 PHOTO CAPTURE CENTER Standard NETWORK Share Printer Share Scanner Share PC FAX (Send) Internet FAX (ITU T.37 simple mode) Scan to E-mail server ITU SUB Addressing Support OS version for PC client Network connection Support Protocols Network Management...

  • Page 44: Chapter 3 Theory Of Operation

    CHAPTER THEORY OF OPERATION Confidential...
  • Page 45 CHAPTER 3 THEORY OF OPERATION This chapter gives an overview of the scanning and printing mechanisms as well as the sensors, actuators, and control electronics. It aids in understanding the basic principles of operation as well as locating defects for troubleshooting. CONTENTS OVERVIEW ........................3-1 MECHANICAL COMPONENTS..................3-2...

  • Page 46: Overview

    3.1 OVERVIEW Host Computer LAN (MFC7820N only) Control Centronics USB interface panel interface parallel interface Control Section Printer data Fax data Line NCU* Speaker ADF unit Scanner unit Laser printing unit Paper Low- and feeding high-voltage - ADF - CIS unit Charging, exposing, mechanism power...

  • Page 47: Mechanical Components

    3.2 MECHANICAL COMPONENTS Eject roller ASSY Halogen heater Corona wire Polygon motor Drum/toner ASSY Pinch roller Blade Laser unit Paper feed roller Rear cover Regist front actuator Fixing unit Heat roller Pinch roller Separation roller Tail edge actuator Pressure roller Pressure roller Separation pad Feed roller...

  • Page 48: Scanner Mechanism

    3.2.1 Scanner Mechanism This mechanism consists of the document cover, the scanner unit (scanner cover), and the automatic document feeder (ADF). The scanner unit consists of a scanner top cover, CIS unit, CIS drive assembly, and scanner base. The detailed illustration on the next page shows the components making up the ADF: document pull-in roller, document separation roller, document feed roller, ADF motor, and document front and rear sensors.
  • Page 49 Separate roller shaft ASSY Separate roller Suction roller Separation rubber ASSY Document rear actuator Document front actuator Separation roller shaft ASSY ADF motor Document Pressure roller Ejection roller Document cover LF roller Pressure roller Pressure roller Document rear actuator Document front actuator This scanner mechanism supports a dual scanning system: ADF scanning and flat-bed scanning.
  • Page 50 (1) ADF scanning: Document moves across stationary CIS unit Placing a document face up in the document support activates the document front sensor, switching to ADF scanning. The CIS drive mechanism (details below) operates for each scanning command executed. The CIS unit first moves to the white-level reference film for white level compensation and then to the ADF scanning position.

  • Page 51: Printing Mechanism

    3.2.2 Printing Mechanism 3.2.2.1 Paper supply The feed roller picks up a few sheets or one sheet of paper from the paper tray every time it is rotated and feeds it to the separation roller. Regist front actuator Separation roller Pinch roller Pinch roller Paper feed roller...
  • Page 52 (1) The paper is gripped between the separation roller and separation pad and separated into individual sheets. The separation roller is connected to the gear 52 P/R. (2) The section of the gear 52 P/R, where there is no cog, is normally fixed at the position as shown in the figure below by the P/R solenoid ASSY.

  • Page 53: Push-Up Function Of Paper Tray

    3.2.2.2 Push-up function of paper tray In order to improve the transfer function of the paper tray, the pressure plate in the paper tray is lifted up by the motor. The pressure plate comes down while the recording paper tray is inserted into the machine. When the main motor rotates, it drives through some gears to actuate the gear 45 arm/FR.
  • Page 54 Link lever Pickup roller holder ASSY Hook B Hook C Paper tray Sector cam Up plate gear Pressure plate Up plate Gear 17 < Table side > Hook C Hook spring Hook A Link lever Gear 13 center P/R Hook B Sector cam Rotated by approx.

  • Page 55: Paper Registration

    3.2.2.3 Paper registration After the paper top position is detected by the regist front actuator, the paper, separated into individual sheets by the separation roller, is fed further for a specified time, and the paper top position reaches the paper feed roller so that the paper skew is adjusted. Then, the F/R solenoid is turned off, the paper feed roller starts turning, and the paper is fed to the transfer roller in the drum/toner ASSY.

  • Page 56: Paper Eject

    3.2.2.4 Paper eject After the printing image on the exposure drum is transferred onto the paper, the paper is fed to the fixing unit to fix unfixed toner onto the paper. Afterwards, the paper is ejected from the fixing unit by the heat roller and the pressure roller in the fixing unit.

  • Page 57: Toner Cartridge

    3.2.2.6 Toner cartridge Develops the electrostatic latent image on the exposure drum with toner and forms the visible image. Toner life end mode The life of the toner cartridge is starter: 1,500, standard: 2,500 pages at the 5% coverage. In the case of low- duty printing, “Toner Life End”...
  • Page 58 New toner detection mechanism The printer detects the amount of the remaining toner with the sensor and indicates the timing to replace the toner cartridge by displaying ‘Toner Life End’ on the LCD to the user. The problem such as toner leak or image defect may occur when low-duty printing is continued for a long time. To prevent such a problem, the printer provides the function displaying the ‘Toner Low’...
  • Page 59 When the new toner detection switch detects that the toner cartridge is replaced with a new one, the developing bias voltage is initialized at the same time. The toner used for the printer has a property that print density is light first and gradually darker in the course of usage.

  • Page 60: Print Process

    3.2.2.7 Print process Charging The drum is charged to approximately 900V by an ion charge which is generated by the primary charger. The charge is generated by ionization of the corona wire, which has a DC bias from the high-voltage power supply applied to it. The flow of the ion charge is controlled by the grid to ensure it is distributed evenly on the drum surface.
  • Page 61 3. The laser beams reflected by the reflection mirror go straight toward the exposure drum below it, then expose the exposure drum. The area exposed to the laser beam is the image to be printed. The surface potential of the exposed area is reduced, forming the electrostatic image to be printed.
  • Page 62 Transfer Transfer process After the drum has been charged and exposed, and has received a developed image, the toner formed is transferred onto the paper by applying a negative charge to the back of the paper. The negative charge applied to the paper causes the positively charged toner to leave the drum, and adhere to the paper.

  • Page 63: Sensors And Actuators

    3.2.3 Sensors and Actuators Sensor name Sensor type Location Cover sensor Main frame L Mechanical switch Toner LED PCB (Light emission) Photo sensor Main frame R Toner sensor PCB (Light reception) Main frame L Photo sensor Paper eject sensor Photo sensor Main PCB Regist front sensor Regist sensor PCB...
  • Page 65 CHAPTER TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR Confidential...
  • Page 66 CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR This chapter describes how to transfer data left in the machine to be sent for repair. The service personnel should instruct end users to follow the transfer procedure given in this chapter if the machine at the user site cannot print received data due to the printing mechanism defective.

  • Page 67: Transferring Received Fax Data

    4.1 TRANSFERRING RECEIVED FAX DATA When the machine at the user site requires to be repaired, unplugging the power cord from the wall socket for sending the machine for repair will lose received FAX data if unprinted and left in the machine.
  • Page 68 Cover page sample End page sample 4 -2 Confidential...

  • Page 69: Chapter 5 Disassembly/Reassembly And Lubrication

    CHAPTER DISASSEMBLY/REASSEMBLY AND LUBRICATION Confidential...

  • Page 70: Components

    CHAPTER 5 DISASSEMBLY/REASSEMBLY AND LUBRICATION This chapter details procedures for disassembling and reassembling the machine together with related notes. The disassembly order flow provided enables you to see at a glance the quickest way to get to component(s) involved. At the start of a disassembly job, you check the disassembly order flow that guides you through a shortcut to the object components.
  • Page 71 5.1.18 High-Voltage PS PCB ASSY................5-48 5.1.19 Main PCB ......................5-49 5.1.20 PS PCB Unit.......................5-51 5.1.21 Laser Unit ......................5-54 5.1.22 Sub Chute ASSY....................5-56 5.1.23 Link Lever......................5-57 5.1.24 Tail Edge Actuator....................5-58 5.1.25 Regist Front Actuator/Regist Front Spring ............5-58 5.1.26 Regist Sensor PCB ASSY..................5-59 5.1.27 Regist Rear Actuator/Regist Rear Spring ............5-59 5.1.28 Fan Motor 60 Unit ....................5-60 5.1.29 Toner LED PCB ASSY/LED Holder ..............5-61...

  • Page 72: Disassembly/Reassembly

    5.1 DISASSEMBLY/REASSEMBLY Safety Precautions To prevent the creation of secondary problems by mishandling, observe the following precautions during maintenance work. Before starting disassembly/reassembly jobs, unplug the power cord and telephone line. In particular, when having access to the power supply inside the machine, make sure that the power cord is unplugged from the electrical outlet;...

  • Page 73: Tightening Torque

    Tightening Torque Location of screw Screw type Q'ty Tightening torque N•m (kgf•cm) Side cover L Taptite, bind B M4x12 0.79 0.1 (8 1) Side cover R Taptite, bind B M4x12 0.79 0.1 (8 1) Ground wire Taptite, cup S M3x6 0.78 0.1 (8 1) Upper document chute Taptite, cup B M3x10...

  • Page 74: Preparation

    Preparation Prior to proceeding with the disassembly procedure, Unplug the modular jack of the telephone line, the USB cable, if connected (not shown below), and the modular jack of the external telephone set if connected (not shown below). How to Access the Object Component On the next page is a disassembly flowchart which helps you access the object components.

  • Page 75: Disassembly Flowchart

    Disassembly Flowchart AC Cord Link Lever Front Cover Drum/Toner ASSY Tail Edge Actuator Pickup Roller Holder ASSY Paper Tray Regist Front Actuator / Regist Sensor PCB ASSY Regist Front Spring Fixing Unit Rear Cover Regist Rear Actuator / High-Voltage PS PCB ASSY Pickup Roller Holder ASSY Rear Chute Cover Regist Rear Spring...

  • Page 76: Ac Cord

    5.1.1 AC Cord (1) Disconnect AC cord from the machine. Machine AC cord 5.1.2 Drum/Toner ASSY (1) Open the front cover and remove the drum/toner ASSY. Front cover Drum/toner ASSY 5 -5 Confidential...

  • Page 77: Paper Tray

    5.1.3 Paper Tray (1) Close the front cover and pull out the paper tray. (2) Remove the paper from the paper tray. Front cover Paper tray (3) Remove the separation pad holder ASSY and the separation pad spring. Separation pad holder ASSY Separation pad holder ASSY Screwdriver...

  • Page 78: Rear Cover

    5.1.4 Rear Cover (1) Remove the rear cover. NOTE: Remove the “A” section of the rear cover while opening the rear cover slightly. “A” Boss Main frame R Rear cover Rear cover Rear cover 5 -7 Confidential...

  • Page 79: Rear Chute Cover

    5.1.5 Rear Chute Cover (1) Remove the rear chute cover. Boss Hook Rear chute cover Paper eject actuator Rear chute cover Rear chute cover (2) Remove the paper eject actuator and the eject actuator spring. Eject actuator spring Paper eject actuator Paper eject actuator Rear chute cover Paper eject actuator...

  • Page 80: Side Cover L

    5.1.6 Side Cover L (1) Open the front cover. (2) Remove the two bind B M4x12 taptite screws, and then remove the side cover L. Taptite, bind B M4x12 Machine Front cover Hook Side cover L Taptite, bind B M4x12 Hooks 5 -9 Confidential...

  • Page 81: Side Cover R

    5.1.7 Side Cover R (1) Remove the two bind B M4x12 taptite screws, and then remove the side cover R. Taptite, bind B M4x12 Side cover R Hook Hook Taptite, bind B M4x12 Hook 5 -1 0 Confidential...

  • Page 82: Adf Unit

    5.1.8 ADF unit (1) Open the ADF unit and scanner unit. (2) Remove the one cup S M3x6 taptite screw and ADF FG harness and FB FG harness. (3) Disconnect the two connectors of the ADF unit from the main PCB. (4) Disconnect the two connectors of the scanner unit from the main PCB.
  • Page 83 (5) Close the ADF unit and scanner unit. (6) Remove the two pins and remove the ADF cover. ADF cover Scanner unit (7) Release the two hooks from the ADF cover and remove the pressure roller ASSY. (8) Remove the two LF springs from the ADF cover. Pressure roller ASSY LF spring ADF cover...
  • Page 84 (9) Remove the two pressure rollers from the pressure roller shaft. Pressure roller shaft Pressure roller (10) Open the ADF unit. (11) Release the hook to remove the gear cover from the ADF unit. ADF unit Gear cover Hook Gear cover 5 -1 3 Confidential...
  • Page 85 (12) Close the ADF unit. (13) Remove the separate roller shaft ASSY and bushing from the ADF unit. Separate roller shaft ASSY Separate roller bushing ADF unit (14) Remove the four cup B M3x10 taptite screws. (15) Release the three hooks “A” to remove the upper document chute. Taptite, cup B M3x10 Upper document chute Hooks “A”...
  • Page 86 (16) Remove the separation rubber ASSY from the upper document chute. Separation rubber ASSY “A” ADF plate spring “A” Hook Upper document chute Hooks (17) Remove the separation rubber from the ADF plate spring. Separation rubber ADF plate spring 5 -1 5 Confidential...
  • Page 87 (18) Remove the two cup B M3x10 taptite screws from the lower document chute. (19) Release the two hooks to remove the lower document chute. NOTE: When re-connecting the connectors, put them through the holes on the ADF unit before connecting Taptite, cup B M3x10 Lower document chute Hook...
  • Page 88 (21) Remove the two ejection rollers from the pressure roller shaft. Pressure roller shaft Ejection roller Ejection roller (22) Remove the ADF unit ejection spring from the ADF unit. ADF unit ADF unit ejection spring 5 -1 7 Confidential...
  • Page 89 (23) Release the two hooks and remove the resin bearing. (24) Remove the LF roller ASSY from the lower document chute. LF roller ASSY Hooks Lower document chute Resin bearing (25) Release the two hooks “A” and remove the the ejection roller ASSY from the lower document chute.
  • Page 90 (27) Remove the two cup B M3x10 taptite screws and one cup S M3x6 taptite screw from the lower document chute. (28) Remove the drive frame ASSY from the lower document chute. Lower document chute Taptite, cup S M3x6 ADF FG harness Drive frame ASSY Taptite, cup B M3x10 (29) Remove the one bind S M3x6 taptite screw from the drive frame ASSY to remove the ADF...
  • Page 91 NOTE: When re-assembling drive frame ASSY, assemble it so that the arm ASSY is at the top. Drive frame ASSY Arm ASSY (31) Remove the document rear actuator from the lower document chute. Document rear actuator Lower document chute Hook 5 -2 0 Confidential...
  • Page 92 (32) Remove the document front actuator from the lower document chute. Document front actuator Hook Lower document chute (33) Release the two hooks “A” on the lower document chute to remove the ADF sensor PCB ASSY. (34) Remove the ADF sensor harness ASSY. ADF sensor PCB ASSY ADF sensor harness ASSY Hooks “A”...
  • Page 93 (35) Turn the lower document chute upside down. (36) Remove the pins and remove the document hold. (37) Remove the document spring from the lower document chute. Hooks Document hold Document spring Hook Lower document chute (38) Open the ADF unit. (39) Remove the one bind B M4x12 taptite screw from the document cover sub ASSY.
  • Page 94 (41) Remove the two springs. (42) Remove the pressure roller ASSY. Spring Pressure roller ASSY Spring Document cover sub ASSY (43) Remove the two pressure rollers from the pressure roller shaft. Pressure roller shaft Pressure rollers 5 -2 3 Confidential...
  • Page 95 (44) Remove the three cup B M3x10 taptite screws to remove the hinge ASSY L. (45) Remove the hinge from the hinge arm. (46) Remove the one bind B M4x12 taptite screw to remove the hinge arm. Document cover sub ASSY Hinge arm Taptite, bind B M4x12 Hinge...

  • Page 96: Pull Arm/Pull Arm Guide/Lock Claw Pull Arm Spring

    5.1.9 Pull Arm/Pull Arm Guide/Lock Claw Pull Arm Spring (1) Open the scanner unit. (2) Release the hook to remove the scanner unit side of the pull arms (R, L). Scanner unit Hook Pull arm (R) Hook Machine Pull arm (L) (3) Remove the pull arm springs and remove the pull arms (R, L) from the pull arm guides.

  • Page 97: Scanner Unit

    5.1.10 Scanner Unit (1) Disconnect the flat cable from the main PCB. (2) Remove the scanner unit from the machine. Scanner unit Machine Flat cable 5.1.11 Panel Unit (1) Remove the four cup B M3x10 taptite screws from the scanner unit. (2) Release the four hooks.
  • Page 98 (3) Disconnect the connector from the panel PCB ASSY. (4) Release the three hooks to remove the panel unit from the scanner unit. Panel PCB ASSY Panel harness ASSY Panel unit Scanner unit Hooks (5) Remove the LCD harness from the panel PCB. (6) Release the three hooks “A”...
  • Page 99 (7) Remove the rubber key. NOTE: When re-assembling the rubber key, make sure that the key works correctly. Rubber key Panel cover Bosses Bosses Bosses Bosses (8) Release the two hooks “A” to remove the backlight guide. Backlight guide Hook Boss Hook “A”...
  • Page 100 (9) Remove the diffusion film. Diffusion film Panel cover Bosses (10) Release the two hooks “A” to remove the LCD. Hooks Hooks “A” 5 -2 9 Confidential...

  • Page 101: Ncu Pcb

    5.1.12 NCU PCB (1) Remove the two bind B M4x12 taptite screws and one pan (S/P washer) M3.5x6 screw from the NCU unit. Screw, pan (S/P washer) M3.5x6 Taptite, bind B NCU FG harness M4x12 NCU unit Machine (2) Remove the one pan (S/P washer) M3.5x6 screw from the NCU shield cover to remove the NCU shield plate.

  • Page 102: Speaker

    (3) Remove the NCU harness ASSY. (4) Remove the two cup S M3x6 taptite screws from the NCU shield cover to remove the NCU PCB ASSY. Taptite, cup S M3x6 NCU PCB ASSY NCU harness ASSY NCU shield cover 5.1.13 Speaker (1) Disconnect the connector of the speaker from the main PCB.
  • Page 103 (2) Release the three hooks to remove the speaker cover. Speaker cover Hook Hooks Machine (3) Release the one hook to remove the speaker hold spring. Speaker hold spring Speaker hold spring Hook Machine Hook 5 -3 2 Confidential...

  • Page 104: Joint Cover Assy/Paper Stopper/Battery Assy

    (4) Remove the speaker ASSY. Speaker ASSY Machine 5.1.14 Joint Cover ASSY /Paper Stopper/Battery ASSY (1) Remove the bind B M4x12 taptite screw, and then remove the rear cover stopper. Taptite, bind B M4x12 Main frame R Rear cover stopper Hooks Hook 5 -3 3...
  • Page 105 (2) Remove the two bind B M4x12 taptite screws and the rear chute cover spring. (3) Remove the inner chute. Inner chute Taptite, bind B M4x12 Rear chute cover spring Taptite, bind B M4x12 NOTE: Re-assemble the inner chute while pushing onto the pinch roller of the inner chute with the eject roller of the joint cover ASSY.
  • Page 106 (4) Remove the battery ASSY and disconnect the connector. Joint cover ASSY Battery ASSY CAUTION: • There is a danger of explosion if the battery is incorrectly replaced. • Do not replace the battery. • Do not disassemble, recharge or dispose of in fire. •...

  • Page 107: Front Cover

    5.1.15 Front Cover (1) Release the hook of the drive release cam from the front cover ASSY. Hook Front cover ASSY Drive release cam Front cover ASSY (2) Release the hook “A” on the front cover ASSY from the chute. (3) Slide the front cover ASSY to the direction of the arrow shown in the figure below to remove it.
  • Page 108 (4) Remove the paper stopper L. Paper stopper L Front cover (5) Remove the paper stopper S from the paper stopper L. Paper stopper S Paper stopper L 5 -3 7 Confidential...

  • Page 109: Pickup Roller Holder Assy

    5.1.16 Pickup Roller Holder ASSY (1) Turn the printer upside down. (2) Remove the six bind B M4x12 taptite screws, and then remove the chute base. Taptite, bind B M4x12 (A) Taptite, bind B M4x12 (B) Taptite, bind B M4x12 Taptite, bind B M4x12 Chute base FG harness ASSY 5...
  • Page 110 <How to check> Take the Drum/Toner Unit out from the printer. Check that the distance between the floor and the separation roller collar of the pickup roller holder ASSY is 45.5 to 47.5mm by using the plate jig. If not, re-assemble the chute base. Separation roller collar Pickup roller holder ASSY (Separation roller)
  • Page 111 (3) Remove the spring extension P/R from the gear 52 P/R. (4) Release the hook and remove the gear 52 P/R. Hook Printer top side (Printer body Upside down) F/R roller shaft ASSY Spring extension P/R Main frame L Gear 52 P/R (5) Remove the bush F/R.
  • Page 112 (7) Remove the link lever from the hook of the pickup roller holder ASSY. (8) Remove the pickup roller holder ASSY. Pickup roller holder ASSY Printer top side Chute (Printer body upside down) Pickup roller holder ASSY Hook Link lever NOTE: The pickup roller holder spring is assembled on the bottom of the pickup roller holder ASSY.

  • Page 113: Fixing Unit

    5.1.17 Fixing Unit (1) Disconnect the heater harness connector and thermistor harness connector. (2) Remove the two cup B M4x12 taptite screws, and then remove fixing unit. Taptite, cup B M4x12 Fixing unit Taptite, cup B M4x12 Heater harness Thermistor harness NOTE: Be sure not to touch the pressure roller.
  • Page 114 (5) Remove the two PR arm ASSY and two PR bush from the pressure roller. PR arm ASSY Pressure roller PR bush PR bush PR arm ASSY (6) Release each hook of the springs from the fuser frame and remove the four separate claw ASSYs.
  • Page 115 (7) Remove the two pan (S/P washer) M3x8 screws. (8) Remove the heat roller. (9) Remove the halogen heater. Screw, pan (S/P washer) Heat roller M3x8 Halogen heater Screw, pan (S/P washer) M3x8 Fuser frame 5 -4 4 Confidential...
  • Page 116 NOTE: When re-assembling the heat roller, assemble the HR bush onto the fuser frame referring to the figure below. Heat roller HR bush Fuser frame NOTE: When re-assembling the halogen heater, put the halogen heater onto the fuser frame so that the terminal of the heater harness is at the top, and secure the screws in the order shown in the figure below.
  • Page 117 (10) Remove the HR gear. (11) Remove the two HR bush. Heat roller HR bush Hooks HR gear HR bush HR gear Return the hook to the original position. Return the hook to the original position. (12) Remove the thermistor ASSY harness from the four hooks. (13) Remove the cup B M3x12 taptite screw, and then remove the thermistor ASSY.
  • Page 118 NOTE: When re-assembling the thermistor ASSY to the fuser frame, ensure the direction of the thermistor ASSY is correct referring to the figure below; Fuser frame Taptite, cup B M3x12 Heat roller Thermistor ASSY 5 -4 7 Confidential...

  • Page 119: High-Voltage Ps Pcb Assy

    5.1.18 High-Voltage PS PCB ASSY (1) Disconnect the three connectors from the high-voltage PS PCB ASSY. (2) Disconnect the high-voltage PS PCB harness from the main PCB. High-voltage PS PCB ASSY High-voltage PS PCB harness Toner sensor PCB harness P/R solenoid harness F/R solenoid harness (3) Remove the two bind B M4x12 taptite screws and the two cup S M3x6 taptite screws.

  • Page 120: Main Pcb

    5.1.19 Main PCB < DCP7010/7020/7025, MFC7420 > (1) Disconnect the thirteen connectors from the main PCB. LD harness 5P Control panel connector Polygon motor connector connector NCU connector (LV harness ASSY) Cover sensor connector Speaker connector Main PCB New toner sensor connector HVPS connector (It has been taken back.)
  • Page 121 < MFC7820N > (1) Disconnect the thirteen connectors from the main PCB. Control panel LD harness 5P Polygon motor connector NCU connector (LV harness ASSY) Cover sensor connector Speaker connector Main PCB New toner sensor connector HVPS connector (It has been taken back.) Main motor connector Battery connector Thermistor relay harness...
  • Page 122 5.1.20 PS PCB Unit (1) Remove the duct film. (2) Remove the pan (S/P washer) M3.5 x 6 screw and FG harness ASSY 1. (3) Remove the pan (S/P washer) M3.5 x 6 screws and FG harness ASSY 5. (4) Remove the pan (S/P washer) M3.5 x 6 screws and NCU FG harness. (5) Remove the two cup S M3x6, taptite screws.
  • Page 123 (8) Remove the pan (S/P washer) M3.5x6 screw, and then remove the ground wire. (9) Remove the bind B M4x12, taptite screw, and then remove the LV shield plate. Main frame R LV shield plate Ground wire Screws, pan (S/P washer) M3.5x6 Taptite, bind B M4x12 (10) Remove the two flat S M3x8, taptite screws, and then remove the inlet harness ASSY.

  • Page 124: Ps Pcb Unit

    (11) Remove the two cup S M3x6 taptite screws. (12) Disconnect the three connectors from the PS PCB unit, and then remove the PS PCB unit. Main frame R LV shield plate PS PCB unit Taptite, cup S M3x6 Taptite, cup S M3x6 NOTE: When disconnecting the connectors, disconnect the regist sensor PCB connector and toner LED PCB unit ASSY connector first, lift up the PS PCB unit from the LV shield plate, and disconnect the main PCB connector.

  • Page 125: Laser Unit

    5.1.21 Laser Unit (1) Remove the cup S M3x6, taptite screw (A) and FG harness ASSY 6. (2) Remove the four cup S M3x6, taptite screws (B). (3) Remove the laser unit. Main frame R Taptite, cup S M3x6 (B) FG harness ASSY 6 Taptite, cup S M3x6 (A) Laser unit...
  • Page 126 (4) Remove the filter ASSY from the air duct. (5) Remove the two cup S M3x6, taptite screws, and then remove the air duct. Filter ASSY Taptite, cup S M3x6 Laser unit Air duct Taptite, cup S M3x6 Hook NOTE: •...

  • Page 127: Sub Chute Assy

    5.1.22 Sub Chute ASSY (1) Remove the two bind B M4x12, taptite screws, and then remove the sub chute ASSY. Chute Taptite, bind B M4x12 Sub chute ASSY Taptite, bind B M4x12 5 -5 6 Confidential...

  • Page 128: Link Lever

    5.1.23 Link Lever (1) Turn the printer body upside down. (2) Pull the “A” section outwards and remove the link lever. Link lever “A” Printer top side (Printer body upside down) NOTE: When re-assembling the link lever, insert the end of the link lever into the main frame L referring to the figure below.

  • Page 129: Tail Edge Actuator

    5.1.24 Tail Edge Actuator (1) Remove the tail edge actuator with the tail edge spring. (2) Remove the tail edge spring from the tail edge actuator. Tail edge actuator Tail edge spring Chute Printer top side (Printer body upside down) 5.1.25 Regist Front Actuator/Regist Front Spring (1) Remove the regist front actuator with the regist front spring.

  • Page 130: Regist Sensor Pcb Assy

    5.1.26 Regist Sensor PCB ASSY (1) Remove the bind B M3x6, taptite screw. (2) Release the harness from the hook and remove the regist sensor PCB ASSY. Taptite, bind B M3x6 Regist sensor PCB ASSY Chute Hooks Printer top side (Printer body upside down) 5.1.27 Regist Rear Actuator/Regist Rear Spring (1) Remove the regist rear spring.

  • Page 131: Fan Motor 60 Unit

    5.1.28 Fan Motor 60 Unit (1) Remove the three bind B M4x12, taptite screws and three FG harness ASSY 1, 4, 5. (2) Remove the base plate. Taptite, bind B M4x12 FG harness ASSY 4 Base plate FG harness ASSY 1 FG harness ASSY 5 Fan motor 60 unit harness Printer top side...

  • Page 132: Toner Led Pcb Assy/Led Holder

    5.1.29 Toner LED PCB ASSY/LED Holder (1) Remove the toner LED PCB ASSY from the main frame R. Main frame R Hooks Toner LED PCB ASSY (2) Remove the LED holder from the toner LED PCB ASSY. Hook LED holder Toner LED PCB ASSY Hook 5 -6 1...

  • Page 133: New Toner Actuator/New Toner Actuator Spring

    5.1.30 New Toner Actuator/New Toner Actuator Spring (1) Remove the new toner actuator spring. (2) Release the hook and remove the new toner actuator from the main frame L. Main frame L New toner actuator spring New toner actuator Hook 5.1.31 New Toner Sensor (1) Release the two hooks and remove the new toner sensor from the main frame L.

  • Page 134: Cover Sensor

    5.1.32 Cover Sensor (1) Release the two hooks and remove the cover sensor from the main frame L. Hook Cover sensor Hook Cover sensor Main frame L 5.1.33 Toner Sensor PCB ASSY (1) Remove the cup B M3x6, taptite screw, and then remove the toner sensor PCB ASSY. Main frame L Toner sensor PCB ASSY Taptite, cup B M3x6...

  • Page 135: Main Motor Assy

    5.1.34 Main Motor ASSY (1) Remove the HVPS insulation sheet. (2) Remove the five bind B M4x12, taptite screws, and then remove the gear plate calking ASSY. Main frame L Gear plate calking ASSY Taptite, bind B M4x12 HVPS insulation sheet Taptite, bind B M4x12 (3) Remove the three cup S M3x6, taptite screws, and then remove the main motor ASSY.

  • Page 136: Develop Joint

    5.1.35 Develop Joint (1) Remove the develop joint from the gear plate calking ASSY. Develop joint Gear plate calking ASSY 5.1.36 P/R Solenoid ASSY (1) Remove the bind B M3x10, taptite screw. (2) Remove the P/R solenoid ASSY, the P/R solenoid lever and the solenoid release spring P/R. Main frame L P/R solenoid lever Solenoid release spring P/R...

  • Page 137: F/R Solenoid Assy

    5.1.37 F/R Solenoid ASSY (1) Remove the gear ASSY from the main frame L. Gear ASSY Main frame L NOTE: The gear ASSY contains the small gears. Be careful not to lose them by disassembling the gear ASSY. Gear center F/R Gear 40/54 F/R Gear 45 arm F/R Gear 17 planetary F/R...
  • Page 138 (2) Remove the bind B M3x10, taptite screw. (3) Remove the F/R solenoid ASSY, the F/R solenoid lever and the solenoid release spring F/R. Main frame L F/R solenoid ASSY Taptite, bind B M3x10 Solenoid release spring F/R F/R solenoid lever 5 -6 7 Confidential...

  • Page 139: Main Frame L

    5.1.38 Main Frame L (1) Remove the two bind B M4x12, taptite screws, and then remove the main frame L. Main frame L Chute Taptite, bind B M4x12 Main frame L 5 -6 8 Confidential...

  • Page 140: Main Frame R

    5.1.39 Main Frame R (1) Remove the three bind B M4x12, taptite screws, and then remove the main frame R. Chute Main frame R Taptite, bind B M4x12 Main frame R 5 -6 9 Confidential...

  • Page 141: Harness Routing

    5.1.40 Harness Routing Laser unit Adhesion tape Laser unit Polygon motor connector Hole LD harness 5P Main PCB FG harness ASSY 1 / FG harness ASSY 5 FG harness ASSY 1 FG harness ASSY 5 PS PCB harness FG harness ASSY 5 Hole Hook Chute...
  • Page 142 FG harness ASSY 6 Laser unit Hole FG harness ASSY 6 Main PCB Regist sensor PCB ASSY PS PCB unit Printer top side (Printer body upside down) Hole Hook Regist sensor PCB ASSY Hook Chute 5 -7 1 Confidential...
  • Page 143 Fan motor 60 unit Hole Hook Hooks Hooks Hole Main PCB Fan motor 60 unit Hole Printer top side (Printer body upside down) Toner LED PCB ASSY Hook Regist sensor PCB harness PS PCB unit FG harness ASSY 5 Toner LED PCB ASSY Hole Binder 5 -7 2...
  • Page 144 Toner sensor PCB ASSY High-voltage PS PCB ASSY Toner sensor PCB ASSY Hook P/R solenoid ASSY / F/R solenoid ASSY High-voltage PS PCB ASSY Hook F/R solenoid ASSY Hook P/R solenoid ASSY 5 -7 3 Confidential...
  • Page 145 New toner sensor / Cover sensor / Battery harness Hole New toner sensor Holes Hole Cover sensor Hook Main PCB Battery harness Panel unit Document scanner Panel unit Panel PCB Hook Hook Hooks Main PCB 5 -7 4 Confidential...
  • Page 146 ADF unit Document scanner ADF motor Document scanner ADF sensor PCB Hooks ADF FG harness FFC CIS harness Hole Hole Hole ADF unit Hole FB motor harness Document FB FG harness scanner Hole Hole Main PCB Main PCB Joint cover ASSY Joint cover ASSY 5 -7 5 Confidential...
  • Page 147 NCU PCB NCU PCB Hole Main PCB NCU FG harness NCU FG harness NCU FG harness Hole NCU unit LV shield unit Joint cover ASSY 5 -7 6 Confidential...

  • Page 148: Speaker Assy

    Speaker ASSY Joint cover ASSY Main PCB Hook Hook Hook Ribs Front Speaker ASSY Joint cover ASSY Main PCB 5 -7 7 Confidential...

  • Page 149: Lubrication

    5.2 LUBRICATION Pendulum gear 22/50 Gear plate calking ASSY DEV drive gear * BG4: KANTO KASEI BG- MU (4 mm dia. Ball) Pickup roller holder ASSY * PG2: PG- 661 (2 mm dia. Ball) 5 -7 8 Confidential...

  • Page 150: Chapter 6 Adjustments And Updating Of Settings, Required After Parts Replacement

    CHAPTER ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT Confidential...

  • Page 151: If You Replace The Main Pcb

    CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT This chapter details adjustments and updating of settings, which are required if main PCB and some other parts have been replaced. CONTENTS IF YOU REPLACE THE MAIN PCB................6-1 [ 1 ] Load update programs/data ................

  • Page 152: If You Replace The Main Pcb

    6.1 IF YOU REPLACE THE MAIN PCB [ 1 ] Load update programs/data If the main PCB is replaced with a new one, write the update programs/data onto the flash ROM. Refer to Appendix 2, page App. 2-2. [ 2 ] Initialize the EEPROM on the main PCB (Function code 01) Refer to Chapter 8, Section...
  • Page 153 6.2 IF YOU REPLACE THE LASER SCANNER UNIT ASSY [ 1 ] Inputting the adjusted value of the laser scanner (1) Double-click the brmainte.EXE file (maintenance utility). (2) Select Input Information from Menu. Select the applicable model name. (3) Check the port (USB) which the machine is connected through. (4) Select ‘Adjust Scanner’...
  • Page 154 CHAPTER CLEANING Confidential...
  • Page 155 CHAPTER 7 CLEANING For the cleaning procedures of the drum unit and toner cartridge, refer to the User's Guide. Confidential...

  • Page 156: Chapter 8 Maintenance Mode

    CHAPTER MAINTENANCE MODE Confidential...

  • Page 157: Entry Into The Maintenance Mode

    CHAPTER 8 MAINTENANCE MODE This chapter describes the maintenance mode which is exclusively designed for the purpose of checks, settings and adjustments using the keys on the control panel. You can customize the EEPROM according to the shipment destination of the machine concerned.

  • Page 158: Entry Into The Maintenance Mode

    TIP: FAX models equipped with numerical keypads can enter the maintenance mode in the same way as conventional models; that is, by pressing the Menu/Set, *, 2, 8, 6 and 4 keys in this sequence. DCP7010/7020/7025 Press the Menu and Start keys. Next press the key four times to make the machine enter the maintenance mode.

  • Page 159: List Of Maintenance Mode Functions

    8.2 LIST OF MAINTENANCE-MODE FUNCTIONS Maintenance-mode Functions Function Reference Function Section (Page) Code EEPROM Parameter Initialization 8.4.1 (8-5) Printout of Scanning Compensation Data 8.4.2 (8-6) Placement of CIS Unit Position for Transportation 8.4.3 (8-8) ADF Performance Test 8.4.4 (8-9) Test Pattern 1 8.4.5 (8-10) Firmware Switch Setting 8.4.6.1 (8-11)

  • Page 160: User-Access To The Maintenance Mode

    8.3 USER-ACCESS TO THE MAINTENANCE MODE Basically, the maintenance-mode functions listed on the previous page should be accessed by service personnel only. However, you can allow end users to access some of these under the guidance of service personnel (e.g., by telephone). The user-accessible functions (codes 06, 09, 10, 11, 12, 53, 54, 80, 82 and 87) are shaded in the table given on the previous page.
  • Page 161 DCP7010/7020/7025 (1) Press the Menu, Start, Menu, and keys in this order. The "MAINTENANCE **" appears on the LCD. (2) Press the Start key several times to display the desired maintenance code on the LCD. Then press the Set key.

  • Page 162: Detailed Description Of Maintenance Mode Functions

    (1) MFC7420/7820N Press the 0 and 1 keys (or the 9 and 1 keys according to your need) in this order in the initial stage of the maintenance mode. DCP7010/7020/7025 Press the key or key several times to display the “MAINTENANCE 01” or “MAINTENANCE 91”...

  • Page 163: Printout Of Scanning Compensation Data (Function Code 05)

    (1) MFC7420/7820N Press the 0 and 5 keys in this order in the initial stage of the maintenance mode. DCP7010/7020/7025 Press the key or key several times to display the “MAINTENANCE 05” code on the LCD.
  • Page 164 Scanning Compensation Data List Confidential 8 - 7...

  • Page 165: Placement Of Cis Unit In Position For Transportation (Function Mode 06)

    P.8-3.) Operating Procedure (1) MFC7420/7820N Press the 0 and 6 keys in this order in the initial stage of the maintenance mode. DCP7010/7020/7025 Press the key or key several times to display the “MAINTENANCE 06” code on the LCD. Then press the Set key .

  • Page 166: Adf Performance Test (Function Mode 08)

    8.4.4 ADF Performance Test (Function code 08) Function The machine counts the documents fed by the automatic document feeder (ADF) and displays the count on the LCD for checking the ADF performance. Operating Procedure (1) Set documents. (Allowable up to the ADF capacity.) The "DOC.

  • Page 167: Test Pattern 1 (Function Mode 09)

    Operating Procedure MFC7420/7820N Press the 0 and 9 keys in this order in the initial stage of the maintenance mode. DCP7010/7020/7025 Press the key or key several times to display the “MAINTENANCE 09” code on the LCD.

  • Page 168: Firmware Switch Setting And Printout

    8.4.6 Firmware Switch Setting and Printout 8.4.6.1 Firmware switch setting (Function code 10) Function The machine incorporates the following firmware switch functions which may be activated with the procedures using the control panel keys and buttons. The firmware switches have been set at the factory in conformity to the communications standards and codes of each country.
  • Page 169 Firmware Switches (WSW01 through WSW51) Continued WSW No. Function WSW38 V.34 transmission settings WSW39 V.34 transmission speed WSW40 V.34 modem settings WSW41 ON-duration of the scanning light source WSW42 Internet mail settings WSW43 Function setting 21 WSW44 Speeding up scanning-1 WSW45 Speeding up scanning-2 WSW46...
  • Page 170 DCP7010/7020/7025 (1) Press the key or key several times to display the “MAINTENANCE 10” code on the LCD. Then press the Set key. The machine displays the "WSW00" on the LCD and becomes ready to accept a firmware switch number.

  • Page 171: Printout Of Firmware Switch Data (Function Mode 11)

    The machine prints out the setting items and contents specified by the firmware switches. Operating Procedure (1) MFC7420/7820N Press the 1 key twice in the initial stage of the maintenance mode. DCP7010/7020/7025 Press the key or key several times to display the “MAINTENANCE 11” code on the LCD.
  • Page 172 Configuration List Confidential 8 - 1 5...
  • Page 173 The machine prints out the setting items and contents specified by the firmware switches. Operating Procedure (1) MFC7420/7820N Press the 1 key twice in the initial stage of the maintenance mode. DCP7010/7020/7025 Press the key or key several times to display the “MAINTENANCE 11” code on the LCD.

  • Page 174: Operational Check Of Control Panel Pcb (Function Mode 13)

    This function allows you to check the control panel PCB for normal operation. Operating Procedure (1) MFC7420/7820N Press the 1 and 3 keys in this order in the initial stage of the maintenance mode. DCP7010/7020/7025 Press the key or key several times to display the “MAINTENANCE 13” code on the LCD.

  • Page 175: Sensor Operational Check (Function Mode 32)

    8.4.9 Sensor Operational Check (Function code 32) Function This function allows you to check whether the 9 sensors. Operating Procedure (1) MFC7420/7820N Press the 3 and 2 keys in this order in the initial stage of the maintenance mode. DCO7010/7020/7025 Press the key or key several times to display the “MAINTENANCE 32”...
  • Page 176 (2) Change the detecting conditions to check that the indication on the LCD changes according to the sensor states. For instance, insert paper through the document front (or rear) sensor or the registration sensor (s), open the front cover or the document cover, remove the toner cartridge, jam paper at the paper outlet, insert paper from the manual feeder, and load a recording paper tray, etc.

  • Page 177: Received Data Transfer Function (Function Mode 53)

    8.4.10 Received Data Transfer Function (Function code 53) (Not applicable to DCP7010/7020/7025) Function This function transfers received FAX data to another machine. It is useful when the machine cannot print received data due to the printing mechanism defective. NOTE: The number of files that can be transferred at a time is 99. To transfer 100 files or more, carry out the following procedure more than one time.
  • Page 178 Cover page sample End page sample Confidential 8 - 2 1...

  • Page 179: Fine Adjustment Of Scan Start/End Positions (Function Mode 54)

    8.4.11 Fine Adjustment of Scan Start/End Positions (Function code 54) (Not applicable to DCP7010/7020/7025) Function This function is to adjust the scan start/end positions. Operating Procedure (1) Press the 5 and 4 keys in this order in the initial stage of the maintenance mode.
  • Page 180 MAINTENANCE 5 and 4 select SCAN START ADJ. 2 second later 1. ADF 2. FB 1 or 2 select Menu/Set key Stop/Exit key MAINTENANCE Stop/Exit key MAINTENANCE Menu/Set key ACCEPTED 1 second later Confidential 8 - 2 3...

  • Page 181: Acquisition Of White Level Data And Cis Scanner Area Setting

    CIS scanner area into the EEPROM on the main PCB. Operating Procedure (1) MFC7420/7820N Press the 5 key twice in the initial stage of the maintenance mode. DCP7010/7020/7025 Press the key or key several times to display the “MAINTENANCE 55” code on the LCD.

  • Page 182: Eeprom Customizing (Function Mode 74)

    NOTE: If you replace the main PCB, be sure to carry out this procedure. Operating Procedure (1) MFC7420/7820N Press the 7 and 4 keys in this order in the initial stage of the maintenance mode. DCP7010/7020/7025 Press the key or key several times to display the “MAINTENANCE 74” code on the LCD.

  • Page 183: Display Of The Equipment's Log Information (Function Mode 80)

    The equipment may display its log information on the LCD. Operating Procedure (1) MFC7420/7820N Press the 8 and 0 keys in this order in the initial stage of the maintenance mode. DCP7010/7020/7025 Press the key or key several times to display the “MAINTENANCE 80” code on the LCD.
  • Page 184 USB: USB Serial No. DRUM: Drum counter COVERAGE: Average black coverage TTL_PG: Total number of pages printed COPY: Number of copies made PC PRINT: Number of PC prints made FAX: *1 Number of FAX outputs made TR1_PG: Number of pages picked up from the paper tray MN_PAGE: Number of pages picked up from the manual tray A4+LTR:...

  • Page 185: Machine Error Code Indication (Function Mode 82)

    (2) Press the Stop/Exit key. Return to the initial stage of the maintenance mode. 8.4.17 Output of Transmission Log to the Telephone Line (Function code 87) (Not applicable to DCP7010/7020/7025) Function This function outputs the transmission log (that the machine has stored about the latest transmission) to the telephone line.

  • Page 186: Cancellation Of The Memory Security Mode (Not Applicable To The Japanese Model)

    8.4.18 Cancellation of the Memory Security Mode (Not applicable to DCP7010/7020/7025 and the Japanese model) Function (Not applicable to DCP7010/7020/7025) This procedure can cancel the memory security mode. Use this procedure if the user forgets his/her password entered when setting the memory security mode so as not to exit from the memory security mode.

  • Page 187: Chapter 9 Error Indication And Troubleshooting

    CHAPTER ERROR INDICATION AND TROUBLESHOOTING Confidential...
  • Page 188 CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING This chapter details error messages and codes that the incorporated self-diagnostic functions display if any error or malfunction occurs. If any error message appears, refer to this chapter to find which components should be checked or replaced. The latter half of this chapter provides sample problems that could occur in the main sections of the machine and related troubleshooting procedures.

  • Page 189: Error Indication

    9.1 ERROR INDICATION To help the user or the service personnel promptly locate the cause of a problem (if any), the facsimile equipment incorporates the self-diagnostic functions which display error messages for equipment errors and communications errors. For the communications errors, the equipment also prints out the transmission verification report and the communications list.
  • Page 190 ERROR MESSAGE CAUSE ACTION Data Remaining Print data is left in the MFC’s Re-start printing from your computer. memory. Print data is left in the MFC’s Press Job Cancel. The MFC will memory. The USB cable was cancel the job and clear it from the unplugged while the computer was memory.
  • Page 191 ERROR MESSAGE CAUSE ACTION Machine too Hot The inside of the machine is too Make sure that the fan in the MFC is hot. spinning and the exhaust outlet is not blocked by something. If the fan is spinning, remove some obstacles around the exhaust outlet, and then leave the MFC turned on but do not use it for several minutes.
  • Page 192 ERROR MESSAGE CAUSE ACTION Scanner Locked The scanner glass’s sensor does (For MFC-7420) ot move to the home position. Check whether the MFC has faxes in its memory. If there are faxes save them. Then, turn off the MFC and then on again.

  • Page 193: 2 ] Error Codes Shown In The "Machine Error X X" Messages

    [ 2 ] Error codes shown in the "MACHINE ERROR X X" message Error Code Symptom Probable Cause Solution (Hex) The back cover is opened. The back cover is Close the back cover. opened. 57-5A Not used. New toner sensor New toner actuator Replace the new toner Error...
  • Page 194 Error Code Symptom Probable Cause Solution (Hex) Heater overheats. Thermistor in the fixing Replace the thermistor in unit defective the fixing unit. PS PCB unit defective Replace PS PCB unit. Main PCB defective Replace the main PCB. The power supply is turned off when the error 76 or 78 occurs.
  • Page 195 AT the start of FAX message Paper smaller than the Load the correct size of printing, the controller detects specified size loaded in paper. that paper is smaller than A4 the paper tray size in length. Main PCB defective Replace the main PCB. Recording paper jam.
  • Page 196 Error Code Symptom Probable Cause Solution (Hex) Not used. The paper feed motor does not rotate. (Not used.) The paper feed motor stops suddenly. (Not used.) Not used. 8D-A0 Not used. Front cover (scanner unit) Hook of the front open Replace the front cover.
  • Page 197 Error Code Symptom Probable Cause Solution (Hex) AD-AE Not used. CIS positioning error. CIS flat cable broken or Correct the cable not connected connection. Replace the scanner cover (scanner unit). CIS motor harness not Correct the harness connected properly connection. CIS defective Replace the scanner cover (scanner unit).
  • Page 198 Error Code Symptom Probable Cause Solution (Hex) Not used. Black level data error. CIS defective Replace the scanner cover (scanner unit). Main PCB defective Replace the main PCB. Scan starting edge detection error. (Not used.) BF-CF Not used. D0-DF Modem error. Main PCB defective Replace the main PCB.

  • Page 199: Communications Errors

    9.1.2 Communications Errors If a communications error occurs, the facsimile equipment (1) emits an audible alarm (intermittent beeping) for approximately 4 seconds, (2) displays the corresponding error message, and (3) prints out the transmission verification report if the equipment is in sending operation. Definition of error codes on the communications list Calling Code 1...
  • Page 200 Compatibility [checking the NSF and DIS] Code 1 Code 2 Causes Remote terminal only with V.29 capability in 2400 or 4800 bps transmission. Remote terminal not ready for polling. Remote terminal not equipped with password function or its password switch OFF. Remote terminal not equipped with or not ready for confidential mailbox function.
  • Page 201 Command reception [checking the NSF and DIS after transmission of NSS and DCS] Code 1 Code 2 Causes Vertical resolution capability changed after compensation of background color. ID checking Code 1 Code 2 Causes Password plus "lower 4 digits of telephone number" not coincident.
  • Page 202 (10) Video signal reception Code 1 Code 2 Causes Error correction sequence not terminated even at the final transmission speed for fallback. Receive buffer empty. (5-second time-out) Receive buffer full during operation except receiving into memory. Decoding error continued on 500 lines. Decoding error continued for 10 seconds.

  • Page 203: Troubleshooting

    9.2 TROUBLESHOOTING 9.2.1 Introduction This section gives the service personnel some of the troubleshooting procedures to be followed if an error or malfunction occurs with the facsimile equipment. It is impossible to anticipate all of the possible problems which may occur in future and determine the troubleshooting procedures, so this section covers some sample problems.

  • Page 204: Troubleshooting Based On Problem Type

    9.2.4 Troubleshooting Based on Problem Type [ 1 ] Paper feeding problems Even if the paper is printed and ejected without any problems such as paper jams, paper feeding problems below may appear. Users can clear these problems by following the ‘User Check’ items for each problem. Even if the same problem occurs again, follow the procedures in the table below.
  • Page 205 Page skew User Check (1) Check that the paper or other media is loaded into the paper tray correctly and that the paper guides are not too tight or too loose against the paper stack. (2) If using the manual feed slot, check how to load paper into the manual feed slot correctly. (3) The paper tray may be too full.

  • Page 206: 2 ] Software Setting Problems

    [ 2 ] Software setting problems The printer may not print the data correctly if there are incorrect software settings. “There was an error writing to LPT1: (or BRUSB) for the printer” error message appears. User Check (1) Check that the printer cable is not damaged or broken. Check also that the cable is connected to the correct interface connectors of both the printer and PC.
  • Page 207 Although the USB driver is installed, it is unable to find the BRUSB: port. (Windows98/Me only) User Check (1) Re-install the USB driver by following the steps below; Turn the printer off. ii) Double-click the file “Deins USB.exe” in the USB directory of the CD-ROM. iii) Re-boot the PC.
  • Page 208 5 m or less. Try to connect the printer and Product ID: PC with the USB cable directly. 0180 (for MFC7420) 0181 (for MFC7820N) 0182 (for DCP7010) 0183 (for DCP7020) 0184 (for DCP7025) Vender: Brother International Corporation (or 0x4f9)

  • Page 209: 3 ] Malfunction

    [ 3 ] Malfunction When taking countermeasures for malfunctions as described in this section, check connectors for contact failure before measuring the voltage at the specified connector pins. No AC power supplied Possible cause Step Check Result Remedy Supply Is the correct voltage Inform the user that the correct voltage present at the outlet?
  • Page 210 WARNING: If you analyze malfunctions with the power plug inserted into the power outlet, special caution should be exercised even if the power switch is OFF because it is a single pole switch Main motor failure Possible cause Step Check Result Remedy Failure of...
  • Page 211 Insufficient output from high-voltage power supply unit Possible cause Step Check Result Remedy High-voltage Do any of the terminals on Clean the terminals. contact the high-voltage contacts have dirt or contact burns? High-voltage Check the connections of Replace the high-voltage power power supply the connector between the supply PCB.
  • Page 212 Is it possible to print the Replace the main PCB. test page with the method? Software bug Does this problem appear Inform the Brother office of the when printing specific data used specific data, printer or printing under a specific condition and system environment? environment.
  • Page 213 M-10 Pickup function of paper tray does not work. Possible cause Step Check Result Remedy Link lever Does the link lever work? Remove the cause of non- does not move Isn't the link lever bent? smooth operation of the link smoothly.
  • Page 214 M-12 Maximum speed is slow. Possible cause Step Check Result Remedy Two or more Does paper double feeding Replace the separation pad. sheets of the occur? paper in the tray are pulled to feed. Foreign body Is a foreign body caught on Remove a foreign body.

  • Page 215: 4 ] Image Defects

    [ 4 ] Image defects 1-1 Light 1-2 Dark 1-3 Completely blank 1-4 All black 1-5 Dirt on the back of paper 1-6 Black vertical streaks 1-6 Black vertical streaks 1-7 Black horizontal stripes 1-8 Black vertical 1-9 White vertical streaks streaks Print out test print out test print out test Print out test print o Print out test print o...
  • Page 216 Light User Check (1) Check the printer’s environment. Conditions such as humidity, high temperatures, etc. may cause this situation to occur. (2) If the whole page is light, toner save mode may be on. Disable toner save mode within Printer Properties tab of the driver. (3) Try installing a new toner cartridge or drum unit.
  • Page 217 Dark User Check (1) Check the paper used meets the recommended paper specifications. (2) Check the printer’s environment. High temperature and high humidity conditions can increase the amount of background shading. (3) Clean the corona wire with the wire cleaner. (4) Try installing a new toner cartridge or drum unit.
  • Page 218 Completely blank Ground Possible cause Check Remedy Step Result contacts Developing Are the developing bias Clean the electrodes at bias contact contacts between the printer both sides. failure body and drum unit dirty? Drum unit Are the drum shaft and Clean the shaft and the drum electrode of the electrode.
  • Page 219 All black User Check (1) Clean the corona wire of the drum unit. (2) The drum unit may be damaged. Install a new drum unit. Ground Possible cause Check Remedy Step Result contacts Corona failure Is the corona wire dirty? Clean the corona wire with the wire cleaner.
  • Page 220 (Menu) the maintenance mode. (3) MFC7420/7820N Press the 6 and 7 keys. DCP7010/7020/7025 Enter 6 and 7 by using the and Set keys. The machine starts to print the grid pattern continuously. (4) When five pages are printed, press the Stop key. The machine returns to the initial stage of the maintenance mode.
  • Page 221 Black and blurred vertical streaks User Check (1) Clean the corona wire in the drum unit. (2) Check that the wire cleaner is at the home position. (3) Check that the toner cartridge is not empty. (4) The drum unit may be damaged. Install a new drum unit. (5) The toner cartridge may be damaged.
  • Page 222 Black and blurred horizontal stripes User Check (1) The drum unit may be damaged. Install a new drum unit. (2) Check the paper used meets the recommended paper specifications. (3) Clean the printer interior and the corona wire in the drum unit. Ground Possible cause Check...
  • Page 223 White vertical streaks User Check (1) Try to wipe the scanner window with a soft cloth. (2) The toner cartridge may be damaged. Install a new toner cartridge. (3) Check the printer’s environment. High temperature and high humidity conditions can cause this problem. (4) Damp (wet) paper might be used.
  • Page 224 I-11 Faulty registration Possible cause Step Check Result Remedy Excessive Is the paper loaded in the Instruct the user to keep paper paper load paper tray more than 27mm loads below 27mm in depth. high? Print paper Is the specified weight of Recommend to use the specified the recommended paper types of paper.
  • Page 225 I-12 Poor fixing Possible cause Step Check Result Remedy Print paper Is thick paper of more than Recommend to use the specified 43lb being used? types of paper. Toner sensor Is the problem solved by 1) Toner is empty. failure replacing the drum unit or 2) The toner sensor is defective.
  • Page 226 I-13 Image distortion Possible cause Check Remedy Step Result Laser unit Is the laser unit secured to Secure the unit correctly and installation the frame incorrectly? tighten the screws. (Check if there is any play.) Scanner LD Is the laser diode or the Replace the laser unit.
  • Page 227 I-15 White spots User Check (1) If the problem is not solved after printing a few pages, the drum unit may have glue from label stock on the exposure drum surface. Refer to Step 1 in the table below and NOTE in the next page.
  • Page 228 NOTE: Clean the drum unit as follows. (1) Remove the toner cartridge from the drum unit. Place the printing samples in front of the drum unit, and find the exact position of the image defect. Drum unit Position of smudge on the drum 74mm interval Printing sample...
  • Page 229 I-16 Black spots User Check (1) If the problem is not solved after printing a few pages, the drum unit may have glue from label stock on the exposure drum surface. Refer to Step 1 in the table below and NOTE in the next page.
  • Page 230 I-17 Black band Ground Possible cause Check Remedy Step Result contacts Corona failure Is the wire cleaner at its Return the wire cleaner home position? to its home position. Corona dirty Is the corona wire dirty? 1) Clean the corona wire.
  • Page 231 I-18 Gray background Possible cause Step Check Result Remedy Print paper Does the paper being used Recommend to use the specified meet the paper types of paper. specification (weight, etc.) Recommend to change to freshly unpacked paper. Is the error indication Toner sensor failure.
  • Page 232 I-19 Hollow print User Check (1) Check the paper used meets the recommended paper specifications. (2) Select the ‘Thick paper mode’ in the printer driver, or use thinner paper than you are currently using. (3) Check the printer’s environment, conditions such as high humidity may cause this situation to occur.
  • Page 233 I-21 Horizontal lines Possible cause Step Check Result Remedy Paper tray Are the ground contacts on Clean the contacts. contacts the right side of the paper tray connecting correctly? Drum unit Are the high-voltage power Clean the contacts. supply and drum unit contacted correctly? I-22 Light rain...
  • Page 234 I-23 Ghost User Check (1) Check the paper used meets the recommended paper specifications. Damp paper, thick media or rough surfaced paper can cause the problem. (2) Check the printer’s environment. High temperature and high humidity conditions can cause the problem. (3) Check that the appropriate media type is selected in the printer driver.
  • Page 235 Location of Grounding Contacts Drum unit (2) Wire cleaner Toner cartridge Drum Unit (4) Developer roller (3) Charge (7) Cleaner (1) Exposure drum (5) Grid (6) Transfer roller Printer body & paper tray (4) Developer roller (3) Charge (5) Grid (7) Cleaner (6) Transfer roller (1) Exposure drum...

  • Page 236: 5 ] Incorrect Printout

    [ 5 ] Incorrect printout When the data is not printed correctly as it is seen on the PC screen, follow the procedures below in the event of a specific error. The printer prints unexpectedly or it prints garbage. User Check (1) Check if the printer cable is not too long.
  • Page 237 Unable to print full pages of a document with the “MEMORY FULL” message. User Check (1) Press the Start key on the control panel to print the data remaining in the printer. (2) Reduce the complexity of your document or reduce the printer resolution. NOTE: This problem may appear if the data is too complex.

  • Page 238: 6 ] Network Problem

    1. Make sure that the printer is powered on, is on-line and ready to print. 2. Check to see if there is any LED activity. Brother print servers have two LEDs on the back panel of the printer. The upper side LED shows Link status. The lower side LED shows Activity (Receive/Transmit) status.
  • Page 239 (5) Make the following selection. Make sure that your print server appears. If it is visible, then the connection is good. Otherwise, go to Step 5. 5. If you have tried 1 to 4 above and it does not work, then reset the print server back to the default factory settings and try from the initial setup again.
  • Page 240 (1) From the Apple menu, open the Chooser. (2) Click the Brother Laser (IP) icon, and make sure that your print server name appears in the right frame. If it is visible, then the connection is good. Otherwise, go to Step (4).
  • Page 241 If you are having trouble printing on a Windows 95/98/Me, Windows NT 4.0 or later Peer-to-Peer network (NetBIOS), check the following: 1. Make sure that the Brother NetBIOS Port driver is correctly installed and configured according ® ® to the Windows 95/98/Me or Windows NT 4.0 Peer-to-Peer (NetBIOS) chapters.

  • Page 242: 7 ] Troubleshooting Of The Control Panel

    [ 7 ] Troubleshooting of the control panel Nothing is displayed on the LCD. User Check (1) Verify if the power switch is turned off. Possible cause Step Check Result Remedy Connection Main PCB and Fix the connector properly. between main control panel PCB PCB and control are properly...
  • Page 243 The control panel does not work. User Check (1) No Possible cause Step Check Result Remedy Key sticking Any key on control Clean up the panel cover, or panel is stuck. remove the burrs from panel cover and panel keys. Connection Main PCB and Fix the connection properly.

  • Page 244: 8 ] Troubleshooting Of Fax Functions

    [ 8 ] Troubleshooting of fax functions FAX can't send it. User Check (1) Verify that the telephone cord is securely inserted. Possible cause Check Remedy Step Result Dialing mode Dialing signal (PB or Check the dialing mode setting setting DP) comes out at customer's again.
  • Page 245 Speed dialing and One-touch dialing can't be used. Possible cause Check Remedy Step Result Speed dialing, A fax transmission can Replace the main PCB. One-touch dialing be made using the key, ten? Dialing mode Dialing signal (PB or Check the dialing mode setting setting DP) comes out normally at customer's again.
  • Page 246 FAX can't be received. User Check (1) Verify that the telephone cord is securely inserted. Possible cause Check Remedy Step Result Receive mode Receive mode is set to Set the receive mode to setting automatic receive mode. automatic receive mode. NCU PCB Replacement of NCU Replace the NCU PCB with a...
  • Page 247 Speaker is silent during on-hook dialing. Possible cause Check Remedy Step Result Connection Main PCB and speaker Fix the connection properly. between main are properly connected. PCB and speaker Speaker Replacement of speaker Replace the speaker with a solves the problem. normal part.

  • Page 248: Appendix 1 Serial Numbering System

    MFC7420/7820N DCP7010/7020/7025 APPENDIX 1. SERIAL NUMBERING SYSTEM This appendix shows the location of serial number labels put on some parts and lists the coding information pertaining to the serial numbers. Confidential...
  • Page 249 SERIAL NUMBERING SYSTEM Individual machines have a serial number label for the machine itself and a property label for the head/carriage unit. This section lists the coding information for those serial numbers and property codes. (1) Serial number label for the machine itself Product item code Serial number Serial number (6-digit)
  • Page 250 (2) Laser unit serial label LSU MODEL DISTINCTION Y delay X delay ERAME MANUFACTURER SERIAL NUMBER AND MOLD DISTINCTION T1 THE 1st. MOLD INSPECTION MACHINE Y3 THE 3rd. MOLD POLYGON MOTOR DISTINCTION REGARDING X delay and Y delay It indicates required delay amount for writing in each of main (X) and sub (Y) scanning direction Location Laser unit serial label App.

  • Page 251: Appendix 2 Firmware Installation

    MFC7420/7820N DCP7010/7020/7025 APPENDIX 2. FIRMWARE INSTALLATION This appendix provides instructions on how to update firmware stored in the flash ROM on the main PCB or load firmware to a new main PCB from the host PC. No hardware replacement is required for updating.

  • Page 252: A2.1 Installing The Update Data To The Machine

    A2.1 INSTALLING THE UPDATE DATA TO THE MACHINE If you want to update the current program stored in the flash ROM of the main PCB to the newer version or after you replace the main PCB, install the update program onto the flash ROM. The program installation requires a PC/AT-compatible computer (which is capable of running MS-DOS or its compatible OS).
  • Page 253 Installing the Update Data onto the Flash ROM of the Machine On a PC running Windows 95 (1) Copy the update data and transfer utility onto the desired same directory of the hard disk. e.g., C:\UPDATE (2) Click the Start button, point to Programs, and then click MS-DOS Prompt to open an MS- DOS window.
  • Page 254 If you use USB cable Preparation You need to have the BHL2-Maintenance Printer driver and FILEDG32.exe (provided by Brother Industries) on hand. Save them in an arbitrary folder in your PC. Installing the BHL2-Maintenance Printer driver To identify terminals connected via USB interface, a PC requires the corresponding virtual USB devices to be implemented by driver/software.
  • Page 255 (6) The following screen appears, indicating the detection of new hardware device by the system. Click Next to proceed. (7) Select "Search for a suitable driver for my device (recommended)" and click Next. (8) Select "Specify a location" and click Next. Confidential Ap p .
  • Page 256 (9) Select the folder where the copy of the BHL2-Maintenance Printer driver is located (or click Browse to specify it), then click OK. (This sample screen is captured on the Windows 2000 desktop.) (10) Click Next. (11) To proceed, click Yes. Confidential Ap p .
  • Page 257 "Found New Hardware Wizard" screen in step (6) appears again. Click Cancel. NOTE: To check that the printer driver is successfully installed, click Start|Settings|Printers to call up the Printers window as shown below and confirm that the Brother BHL2-Maintenance Printer icon is displayed.
  • Page 258 MFC7820N/7420 While holding down the 5 key, plug the power cord into an electrical outlet. DCP7010/7020/7025 While holding down the Number of Copies key, plug the power cord into an electrical outlet. The machine should show the black and white pattern on the LCD.
  • Page 259 Press the * and # keys at the same time when the machine is on standby. The firmware version appears on the LCD. DCP7010/7020/7025 Press the Menu and Start keys. Next press the key four times to make the machine enter the maintenance mode.

  • Page 260: A2.2 Setting Id Codes To Machines

    A2.2 SETTING ID CODES TO MACHINES Brother driver machines are assigned unique ID codes (character strings) at the factory. If you replace the main PCB of the machine, the machine will lose its assigned ID code so that it will not be identified by the connected PC*.

  • Page 261: Appendix 3 Customizing Codes According To Shipping Destination

    MFC7420/7820N DCP7010/7020/7025 APPENDIX 3. CUSTOMIZING CODES ACCORDING TO SHIPPING DESTINATION This appendix lists the customizing codes for the various preferences exclusively designed for each destination (e.g. language). Those codes are stored in the memory (EEPROM) mounted on the main PCB. If the main PCB is replaced with a new one, therefore, you will need to set the proper customizing codes with the machine in the maintenance mode.
  • Page 262 LCD. (2) MFC7420/7820N Press the 7 and 4 keys in this order in the initial stage of the maintenance mode. DCP7010/7020/7025 Enter 7 and 4 in the initial stage of the maintenance mode by using and Set keys.* (*To enter a numerical code on models having no numerical keypad, press the key several times to display the numerical code to be entered and then press the Set key.
  • Page 263 MFC7420/7820N DCP7010/7020/7025 APPENDIX 4. FIRMWARE SWITCHES (WSW) This appendix describes the functions of the firmware switches, which can be divided into two groups: one is for customizing preferences designed for the shipping destination (as described Appendix 3) and the other is for modifying preferences that match the machine to the environmental conditions.
  • Page 264 WSW No. Function Refer to: WSW01 Dial pulse setting App. 4-3 WSW02 Tone signal setting App. 4-4 WSW03 PABX mode setting App. 4-5 WSW04 TRANSFER facility setting App. 4-6 WSW05 1st dial tone and busy tone detection App. 4-7 WSW06 Redial/Pause key setting and 2nd dial tone detection App.
  • Page 265 WSW No. Function Refer to: WSW38 V.34 transmission settings App. 4-42 WSW39 V.34 transmission speed App. 4-43 WSW40 V.34 modem settings App. 4-44 WSW41 ON-duration of the scanning light source App. 4-46 WSW42 Internet mail settings App. 4-47 WSW43 Function setting 21 App.
  • Page 266 WSW01 (Dial pulse setting) Selector Function Setting and Specifications No. 1 2 Dial pulse generation mode 10-N No. 3 4 60 ms Break time length in pulse dialing 67 ms 40 ms (for 16 PPS) 64 ms (at 106-ms intervals) No.
  • Page 267 Selector 7: Switching between pulse (DP) and tone (PB) dialing, by the function switch This selector determines whether or not the dialing mode can be switched between the pulse (DP) and tone (PB) dialing by using the function switch. Selector 8: Default dialing mode, pulse (DP) or tone (PB) dialing This selector sets the default dialing mode (pulse dialing or tone dialing) which can be changed by the function switch.
  • Page 268 WSW03 (PABX* mode setting) Selector Setting and Specifications Function CNG detection when sharing a modular wall socket with a 0: A 1: B telephone No. 2 3 4 0 0 0 : 50 ms 0 0 1 : 210 ms Detection time length of 0 1 0 : 500 ms...
  • Page 269 Selectors 6 and 7: Dial tone detection in PABX (Not used.) 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 machine starts dialing upon detection of a dial tone when a line is connected.
  • Page 270 Selector 4: Dual tone detection sensitivity in ICM recording Setting this selector to "1" increases the tone detection sensitivity in ICM recording. Selectors 5 and 6: Earth time length for earth function (Not used.) These selectors set the short-circuiting time length of the telephone line (La or Lb) to ground. This setting is effective only when the earth function is selected for the R key by using the function switch.
  • Page 271 Selectors 1 through 3: 1st dial tone detection These selectors activate or deactivate the 1st dial tone detection function which detects the 1st dial tone issued from the PSTN when a line is connected to the PSTN. Setting all of these selectors to "1" activates the dial tone detection function so that the machine starts dialing upon detection of a dial tone when a line is connected.
  • Page 272 WSW06 (Redial/Pause key setting and 2nd dial tone detection) Selector Function Setting and Specifications No. 1 2 3 0 0 0 : No pause 0 0 1 : 3.5 sec. WAIT 0 1 0 : 7 sec. WAIT 0 1 1 : 10.5 sec.
  • Page 273 Selectors 1 through 3: Redial/Pause key setting and 2nd dial tone detection Selectors No WAIT is inserted even if the Redial/Pause key is pressed. If you press the Redial/Pause key during dialing, the machine will insert WAIT as defined in the above table. If the Redial/Pause key is pressed repeatedly, the machine inserts the specified WAIT multiplied by the number of depressions.
  • Page 274 WSW07 (Dial tone setting 1) Selector Setting and Specifications Function No. 1 2 : Narrows by 10 Hz Dial tone frequency band control : Initial value : Widens by 10 Hz Line current detection 0: No 1: Yes (Not used.) No.
  • Page 275 WSW08 (Dial tone setting 2) Selector Setting and Specifications Function No. 1 2 3 0 0 0 : 50 ms 0 0 1 : 210 ms 0 1 0 : 500 ms 1st dial tone detection time 0 1 1 : 800 ms length 1 0 0 :...
  • Page 276 WSW09 (Protocol definition 1) Selector Setting and Specifications Function Frame length selection 256 octets 1: 64 octets Use of non-standard Allowed 1: Prohibited commands No. 3 4 times No. of retries 3 times 2 times 1 time T5 timer 0: 300 sec. 60 sec.
  • Page 277 WSW10 (Protocol definition 2) Selector Function Setting and Specifications Not used. Time length from transmission of the last dial digit to CML 0: 100 ms 1: 50 ms Time length from CML ON to 0: 2 sec. 1: 4 sec. CNG transmission Time length from CML ON to CED transmission (except for...
  • Page 278 WSW11 (Busy tone setting) Selector Function Setting and Specifications No. 1 : Narrows by 10 Hz Busy tone frequency band control : Initial value : Widens by 10 Hz 1: 250-750/250-750 ms 1: 400-600/400-600 ms ON/OFF time length ranges 1: 175-440/175-440 ms for busy tone (More than one setting 1: 100-1000 ms/17-660 ms...
  • Page 279 WSW12 (Signal detection condition setting) Selector Function Setting and Specifications No. 1 1500 ms Min. detection period required 500 ms for interpreting incoming calling signal (CI) as OFF 700 ms 900 ms No. 3 6 sec. Max. detection period for incoming calling signal (CI) 7 sec.
  • Page 280 WSW13 (Modem setting) Selector Function Setting and Specifications No. 1 0 km Cable equalizer 1.8 km 3.6 km 5.6 km No. 3 -43 dBm Reception level -47 dBm -49 dBm -51 dBm 0: 0 dB 1: 8 dB 0: 0 dB 1: 4 dB Modem attenuator 0: 0 dB...
  • Page 281 WSW14 (AUTO ANS facility setting) Selector Function Setting and Specifications No. 1 13 Hz Frequency band selection (lower limit) for incoming calling signal 15 Hz (CI) 23 Hz 20 Hz No. 3 30 Hz Frequency band selection (upper limit) for incoming calling signal 55 Hz (CI) 70 Hz...
  • Page 282 WSW15 (REDIAL facility setting) Selector Function Setting and Specifications No. 1 5 minutes Redial interval 1 minute 2 minutes 3 minutes No. 3 16 times 1 times No. of redialings 2 times 3 times 15 times Not used. CRP option 0: Disable 1: Enable Selectors 1 through 6:...
  • Page 283 WSW16 (Function setting 1) Selector Function Setting and Specifications Not used. ITU-T (CCITT) superfine 0: OFF 1: ON recommendation Not used. Max. document length 0: 400 cm 1: 90 cm limitation Stop/Exit key pressed during 0: Not functional 1: Functional reception NOTE: Selector 7 is applicable to models equipped with ADF units.
  • Page 284 WSW17 (Function setting 2 Selector Function Setting and Specifications No. 1 No alarm Always valid Off-hook alarm Valid except when 'call reservation' is selected. Not used. Calendar clock type U.S.A. type 1: European type Not used. Non-ring reception 1: ON Not used.
  • Page 285 WSW18 (Function setting 3) Selector Function Setting and Specifications Not used. No. 2 40 sec. Detection enabled time for CNG 0 sec. (No detection) and no tone 5 sec. 80 sec. Not used. Registration of station ID Permitted Prohibited No. 7 No monitoring Up to phase B at the Tone sound monitoring...
  • Page 286 WSW19 (Transmission speed setting) Selector Function Setting and Specifications No. 1 First transmission speed choice No. 4 for fallback 2,400 bps 4,800 bps 7,200 bps 9,600 bps 12,000 bps Last transmission speed choice for fallback 14,400 bps V.34 mode 0: Permitted 1: Prohibited V.17 mode 0: Permitted...
  • Page 287 WSW20 (Overseas communications mode setting) Selector Function Setting and Specifications EP* tone prefix 0: OFF 1: ON Overseas communications 0: 2100 Hz 1: 1100 Hz mode (Reception) Overseas communications 0: OFF 1: Ignores DIS once. mode (Transmission) No. 4 100 ms Min.
  • Page 288 Selectors 8: Limitation on CNG detection If this selector is set to "1," the machine detects a CNG signal according to the condition preset by selectors 2 and 3 on WSW18 after a line is connected. If it is set to "0," the machine detects a CNG signal as long as the line is connected.
  • Page 289 WSW22 (ECM and call waiting caller ID) Selector Function Setting and Specifications ECM* in sending 0: ON 1: OFF ECM* in receiving 0: ON 1: OFF Call Waiting Caller ID 0: ON 1: OFF Not used. 0: 0% 1: 8% Acceptable TCF bit error rate (%) 0: 0% 1: 4%...
  • Page 290 WSW23 (Communications setting) Selector Function Setting and Specifications 0: From the head of a series of zeros Starting point of training check (TCF) 1: From any arbitrary point No. 2 Allowable training error rate 0.5% No. 4 Decoding error rate for transmission of RTN Not used.
  • Page 291 WSW24 (TAD setting 2) Selector Function Setting and Specifications 15 sec. Maximum OGM recording 20 sec. time 30 sec. 50 sec. 4 sec. Time length from CML ON to start of pseudo ring 3 sec. backtone transmission 2 sec. 1 sec. Attenuator for playback of 0 dB 8 dB...
  • Page 292 WSW25 (TAD setting 3) Selector Function Setting and Specifications Not used. No. 5 2 sec. 4 sec. 6 sec. Pause between paging number 8 sec. and PIN 10 sec. 12 sec. 14 sec. 16 sec. Not used. NOTE: Selectors 5 through 7 are applicable to the U.S.A. models only. Selectors 5 through 7: Pause between paging number and PIN These selectors set the pause time between a telephone number being paged and PIN (personal...
  • Page 293 WSW26 (Function setting 4) Selector Function Setting and Specifications Not used. Dialing during document reading into the temporary 0: Disable 1: Enable memory in in-memory message transmission No. of CNG cycles to be No. 4 detected (when the line is connected via the external telephone except in the external TAD mode or via the built-in telephone)
  • Page 294 WSW27 (Function setting 5) Selector Function Setting and Specifications Not used. Ringer OFF setting 0: Yes 1: No Automatic playback of OGM when 0: No 1: Yes switched to the TAD mode Detection of distinctive ringing pattern 0: Yes 1: No (Not used.) Recording quality 0: Normal...
  • Page 295 WSW28 (Function setting 6) Selector Function Setting and Specifications No. 1 2 3 0 0 0 0 dB 0 0 1 +1 dB 0 1 0 +2 dB Transmission level of DTMF 0 1 1 +3 dB high-band frequency signal 1 0 0 0 dB 1 0 1...
  • Page 296 WSW29 (Function setting 7) Selector Function Setting and Specifications No. 1 2 3 0 0 0 -47.0 dBm (A) 0 0 1 -48.5 dBm (B) Compression threshold level 0 1 0 -50.0 dBm (C) for voice signals inputted via 0 1 1 -51.5 dBm (D) the telephone line in the built- 1 0 0...
  • Page 297 WSW30 (Function setting 8) Selector Function Setting and Specifications No. 1 2 3 0 0 0 -38.0 dBm (A) 0 0 1 -39.5 dBm (B) 0 1 0 -41.0 dBm (C) Dial tone/busy tone detection level during recording of ICM 0 1 1 -42.5 dBm (D) (Not used.)
  • Page 298 WSW31 (Function setting 9) Selector Function Setting and Specifications Not used. Default reduction rate for failure of automatic reduction 0: 100% 1: 70% during recording Not used. (Do not disturb this selector.) Minimum ON and OFF duration of ringer signals 0: 130 ms 1: 90 ms effective in distinctive ringing...
  • Page 299 WSW32 (Function setting 10) Selector Function Setting and Specifications Not used. No. 5 Standard Default resolution Fine Super fine Photo No. 7 Automatic Default contrast Super light Super dark Selectors 5 and 6: Default resolution These selectors set the default resolution which applies when the machine is turned on or completes a transaction.
  • Page 300 WSW33 (Function setting 11) Selector Function Setting and Specifications No. 1 2 3 0 0 0 : -42.5 dBm (A) 0 0 1 : -44.0 dBm (B) 0 1 0 : -45.5 dBm (C) Detection threshold level of "no 0 1 1 : -47.0 dBm (D) tone"...
  • Page 301 WSW34 (Function setting 12) Selector Function Setting and Specifications No. 1 0 sec. Erasing time length of ICM 1 sec. tone recorded preceding the 2 sec. tone detection starting point in 3 sec. the case of automatic line 4 sec. disconnection due to no voice 5 sec.
  • Page 302 WSW35 (Function setting 13) Selector Function Setting and Specifications No. 1 2 3 4 0 0 0 0 : No detection 0 0 0 1 : 1 sec. Max. detection period of dial tone/busy tone during recording of 0 0 1 0 : 2 sec.
  • Page 303 WSW36 (Function setting 14) Selector Function Setting and Specifications ECP mode* 0: ON (Not used.) Recovery from Inactive PC Interface 0: Disable Enable (Not used.) PC Power-off Recognition Time 0: Normal Long (Not used.) Not used. Escape from phase C 0: Yes No.
  • Page 304 Selectors 6 through 8: Extension of incoming calling signal (CI) frequency band specified by selectors 1 through 4 on WSW14 At the start of reception, if the machine detects the frequency of a CI signal specified by selectors 1 through 4 on WSW14, it starts the ringer sounding. However, the machine may fail to detect the CI signal normally due to noise superimposed at the time of reception.
  • Page 305 WSW38 (V.34 transmission settings) Selector Function Setting and Specifications No. 1 X : Automatic Setting of the equalizer : Fixed to 4 points : Fixed to 16 points Sending level of guard tone at 0: Normal - 7 db 1: Normal phase 2 Stepping down the transmission 0: 2400 bps...
  • Page 306 WSW39 (V.34 transmission speed) Selector Function Setting and Specifications No. 1 No. 5 2400 bps 4800 bps 7200 bps First transmission speed choice for fallback 9600 bps 12000 bps 14400 bps 16800 bps 19200 bps 21600 bps 24000 bps 26400 bps 28800 bps Last transmission speed choice for fallback...
  • Page 307 WSW40 (V.34 modem settings) Selector Function Setting and Specifications Not used. Not masking Masking No. 3 3429 symbols/sec No. 4 3200 symbols/sec Masking of symbol rate(s) No. 5 3000 symbols/sec No. 6 2800 symbols/sec No. 7 Not used. No. 8 2400 symbols/sec NOTE: WSW40 takes effect only when the V.34 mode is permitted (WSW19, selector 7) in models supporting V.34 mode.
  • Page 308 Symbol rate Transmission speed Symbol rate Transmission speed Symbol rate Transmission speed (bps) (bps) (bps) 2400 2400 3000 4800 3429 4800 4800 7200 7200 7200 9600 9600 9600 12000 12000 12000 14400 14400 14400 16800 16800 16800 19200 19200 19200 21600 21600 21600...
  • Page 309 WSW41 (ON-duration of the scanning light source) Selector Function Setting and Specifications No. 1 2 3 0 0 0 16 hours 0 0 1 24 hours ON-duration of the scanning 0 1 0 12 hours light source at room 0 1 1 8 hours temperature 1 0 0...
  • Page 310 WSW42 (Internet mail settings) Selector Function Setting and Specifications Access to the incoming mail (POP3) server 0: Disable 1: Enable (Periodical or on-demand) Access to the outgoing mail 0: Disable 1: Enable (SMTP) server I-FAX relay 0: Disable 1: Enable Not used.
  • Page 311 WSW44 ( Speeding up scanning-1) Selector Function Setting and Specifications Not used. No. 6 7 8 0 0 0 : Obtained compensation data ineffective 0 0 1 : 1 min. Effective time length of the white level compensation data 0 1 0 : 3 min.
  • Page 312 WSW45 ( Speeding up scanning-2) Selector Function Setting and Specifications No. 1 2 3 0 0 0 : No automatic drawing-in 0 0 1 : 1 sec. Delay time from when 0 1 0 : 2 sec. documents are set until the 0 1 1 : 3 sec.
  • Page 313 WSW46 (Monitor of power ON/OFF state and parallel port kept at high) Selector Function Setting and Specifications No. 1 2 0 0 : Disable Monitoring the PC ON/OFF 0 1 : Monitor SELECT IN state 1 0 : Monitor STROBE (Not used.) 1 1 : Monitor both SELECT IN and...
  • Page 314 WSW47 (Switching between high- and full-speed USB) Selector Function Setting and Specifications Handling paper at the 0: Eject paper w/o print 1: Print on the current occurrence of a paper feed paper timing error Not used. No. 3 4 Delay of FAX line 0 0 : 200 ms disconnection when switching 0 1 : 400 ms...
  • Page 315 WSW48 (USB setup latency) Selector Function Setting and Specifications Not used. No. 6 7 8 0 0 0 : Default period 0 0 1 : Shorter 1 0 1 0 : Longer 1 0 1 1 : Longer 2 USB setup latency 1 0 0 : Longer 3 1 0 1 : Longer 4 1 0 0 : Shorter 2...
  • Page 316 WSW50 (SDAA settings) Selector Function Setting and Specifications No. 1 2 Percentage voltage for 0 0 : 80% interpreting the external telephone as being hooked up 0 1 : 90% (based on the network's standard 1 0 : 70% voltage) (Not used) 1 1 : No detection DC mask curve table to be Apply the initial value specified by local...
  • Page 317 WSW51 (Function setting 16) Selector Function Setting and Specifications Output of communications error report when transmission 0: Enable 1: Disable verification report is disabled Not used. App. 4-54 Confidential...
  • Page 318 MFC7420/7820N DCP7010/7020/7025 APPENDIX 5. WIRING DIAGRAM This appendix provides the wiring diagram that helps you understand the connections between PCBs. Confidential...
  • Page 319 CN20-2 CN10-2 CN501 NFC7820N only PNEW_SEN CN8-2 FRONT_COVER_SEN CN18 Europe version only NFC7420/7820N only CN500-12 CHRG Parallel LINE RDPS Interface RL2/POL Europe/Canada version only CN12 VCC5 TELOFF Hand VCC24 CN9-2 VOUT1 VOUT2 Confidential NFC7820N only...
  • Page 320 MFC7420/7820N DCP7010/7020/7025 APPENDIX 6. CIRCUIT DIAGRAMS This appendix provides the circuit diagrams of the NCU PCB and power supply PCB. A. NCU PCB: MFC7420 (U.S.A. and CANADA models) NCU PCB: MFC7820N (U.S.A. and CANADA models) NCU PCB: MFC7420 (EUROPE models) NCU PCB: MFC7820N (EUROPE models) B.
  • Page 321 A. NCU PCB: MFC7420 (U.S.A. and CANADA models) Confidential...
  • Page 322 A. NCU PCB: MFC7820N (U.S.A. and CANADA models) Confidential...
  • Page 323 A. NCU PCB:MFC7420 (EUROPE models) Confidential...
  • Page 324 A. NCU PCB: MFC7820N (EUROPE models) Confidential...
  • Page 325 B. Power Supply PCB 100V (U.S.A. and CANADA models) Confidential...
  • Page 326 B. Power Supply PCB 200V (EUROPE models) Confidential...
  • Page 327 December '04 SM-FAX036(2) 8C5A03 Printed in Japan...

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