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Brother DCP-7030 Service Manual

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Laser Multi-Function Center
SERVICE REFERENCE MANUAL
DCP-7030/7040/7045N
MFC-7320/7340/7440N/7450/
Read this manual thoroughly before maintenance work.
Keep this manual in a convenient place for quick and easy reference at all times.
Jan 2008
SM-FAX087
8C5C
(2)
MODEL:
7840N/7840W
Confidential

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   Summary of Contents for Brother DCP-7030

  • Page 1

    Laser Multi-Function Center SERVICE REFERENCE MANUAL MODEL: DCP-7030/7040/7045N MFC-7320/7340/7440N/7450/ 7840N/7840W Read this manual thoroughly before maintenance work. Keep this manual in a convenient place for quick and easy reference at all times. Jan 2008 SM-FAX087 8C5C Confidential...

  • Page 2

    PREFACE This service reference manual contains basic information required for after-sales service of the laser printer (hereinafter referred to as “the machine”). This information is vital to the service personnel to maintain the high printing quality and performance of the machine. This service manual covers the DCP 7030/7040/7045N, MFC 7320/7340/7440N/7450/ 7840N/7840W machines.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS REFERENCE 1 SPECIFICATIONS ..............Ref. 1-1 1. COMPONENTS ........................Ref. 1-1 2. SPECIFICATIONS LIST ....................... Ref. 1-3 Printing ........................Ref. 1-3 Functions ........................Ref. 1-5 Electronics and Mechanics ..................Ref. 1-9 Network Connectivity ....................Ref. 1-10 Service Information ....................Ref. 1-13 Paper .........................

  • Page 4

    3.5.2 Print Process ....................Ref. 2-21 APPENDIX 1 TONER CARTRIDGE WEIGHT INFORMATION ....App. 1-1 APPENDIX 2 GLOSSARY ................App. 2-1 APPENDIX 3 REFERENCES ...............App. 3-1 Confidential...

  • Page 5: Reference 1 Specifications

    REFERENCE 1 SPECIFICATIONS COMPONENTS ■ Printer part Speaker cover Pull arm R NCU shield Pull arm L Pull arm spring ADF R Battery ASSY Pull arm spring ADF Back cover Speaker hold spring NCU PCB Lock claw Speaker unit Pull arm guide Outer chute ASSY Joint cover ASSY Eject roller ASSY 2...

  • Page 6

    ■ ADF / FB part Gear cover Panel dress cover ADF cover Address label Panel unit Separation rubber Separate roller shaft ASSY Separate roller bushing ADF plate spring Diffusion film Back light guide Rubber key R Upper document chute ASSY Rubber key L Pressure roller ASSY Pressure roller spring...

  • Page 7: Specifications List

    SPECIFICATIONS LIST Printing Model DCP 7030 DCP 7040 DCP 7045N Print method Electrophotography by semiconductor laser beam scanning Laser Method: 1 polygon motor, 1 laser beam Wavelength: 780nm~800nm Output: 10mW (Maximum) Resolution HQ1200 ® Windows 2000 / XP / XP Professional x64 Edition, Windows ®...

  • Page 8

    Model MFC 7320 MFC 7340 MFC 7440N MFC 7840W Print method Electrophotography by semiconductor laser beam scanning Laser Method: 1 polygon motor, 1 laser beam Wavelength: 780nm~800nm Output: 10mW (Maximum) Resolution HQ1200 ® Windows 2000 / XP / XP Professional x64 Edition, Windows ®...

  • Page 9: Functions

    ® Brother original Windows utility for printer and print server management. It has more functions than BRAdmin Light. Download from http://solutions.brother.com. Server based management utility. Download from http://solutions.brother.com. Printer and print server management through Web Based Management (Web browser). Ref. 1-5...

  • Page 10

    ® Brother original Windows utility for printer and print server management. It has more functions than BRAdmin Light. Download from http://solutions.brother.com. Server based management utility. Download from http://solutions.brother.com. Printer and print server management through Web Based Management (Web browser). Ref. 1-6...

  • Page 11

    *1 *2 (x86, x64 environment) Linux driver for LPD/LPRng printing system *1 *2 (x86, x64 environment) Download the printer driver for Linux from http://solutions.brother.com. Depending on Linux distributions, the driver may not be available. Model MFC 7320 MFC 7340 MFC 7440N MFC 7840W ®...

  • Page 12

    <System requirements> Recom- Available Computer Platform & Processor Minimum Minimum mended Hard Disk Operating System Version Speed Space ® ® ® Windows 2000 Intel Pentium II or 64MB 256MB 50MB Professional equivalent XP Home 128MB Edition XP Professional ® XP Professional 64-bit (Intel 64 or 256MB...

  • Page 13: Electronics And Mechanics

    Electronics and Mechanics Model DCP 7030 DCP 7040 DCP 7045N Power Copying Average 320W at 25°C (77°F) consumption Standby Average 75W at 25°C (77°F) Sleep Average 10W at 25°C (77°F) Noise level Sound Pressure Printing: 50dB(A) Standby: 30dB(A) Sound power Printing: LWAd = 6.4Bell(A) Standby: LWAd = 4.4Bell(A) Temperature...

  • Page 14: Network Connectivity

    ® ® Network printing Windows 2000 / XP, Windows Vista and Windows Server 2003 TCP/IP printing ® Mac OS X 10.2.4 or greater printing If you want to use the IPv6 protocol, visit http://solutions.brother.com for more information. Ref. 1-10 Confidential...

  • Page 15

    ® ® Network printing Windows 2000 / XP, Windows Vista and Windows Server 2003 TCP/IP printing ® Mac OS X 10.2.4 or greater printing If you want to use the IPv6 protocol, visit http://solutions.brother.com for more information. Ref. 1-11 Confidential...

  • Page 16

    4.0, Windows 2000 Professional / Server / Advanced ® Server, Windows XP Professional/XP Professional x64 Edition, ® ® Windows Vista , Windows Server 2003/2003 x64 Edition BRAdmin Professional and Web BRAdmin are available as a download from http://solutions.brother.com Ref. 1-12 Confidential...

  • Page 17: Service Information

    Service Information These are key service information to maintain the product. Machine life: 50,000pages/ 5years MTBF (Meantime between failure): Up to 4,000hours MTTR (Meantime to repair): Average 30minutes Monthly volume: 10,000pages Periodical replacement parts: None There are no periodical replacement parts needed to maintain this product. Ref.

  • Page 18: Paper

    Paper 2.6.1 Paper handling DCP7040/7045N, Model DCP 7030 MFC7320/7340/7440N/7840W Paper Input Manual feed slot 1sheet Paper tray 250sheets 35 sheets Paper Output Face-down 100sheets Face-up 1sheet Duplex Manual Duplex Calculated with 80g/m (20lb) paper 2.6.2 Media specifications DCP7040/7045N, Model DCP 7030 MFC7320/7340/7440N/7840W Media types Manual feed slot Plain paper, Bond paper, Recycled paper, Thin paper,...

  • Page 19: Type And Size Of Paper

    2.6.3 Type and size of paper The printer loads paper from the installed paper tray or the manual feed slot. The names for the paper trays in the printer driver are as follows: Paper tray Tray 1 Manual feed slot Manual Auto Document Feeder <Media type>...

  • Page 20: Printable Area

    Printable Area 2.7.1 PCL5e emulation 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: •...

  • Page 21

    The table below shows the printable areas when printing on Portrait for each paper size. Size 215.9mm 279.4mm 203.2mm 279.4mm 6.35mm 4.2mm Letter 8.5” 11.0” 8.0” 11.0” 0.25” 0.16” (2,550dots) (3,300dots) (2,400dots) (3,300dots) (75dots) (50dots) 215.9mm 355.6mm 203.2mm 355.6mm 4.2mm ↑...

  • Page 22

    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. •...

  • Page 23

    The table below shows the printable areas when printing on Landscape for each paper size. Size 279.4mm 215.9mm 269.3mm 215.9mm 5.0mm 4.2mm Letter 11.0” 8.5” 10.6” 8.5” 0.2” 0.16” (3,300dots) (2,550dots) (3,180dots) (2,550dots) (60dots) (50dots) 355.6mm 215.9mm 345.5mm 215.9mm 4.2mm ↑...

  • Page 24: Pcl6 Emulation

    2.7.2 PCL6 emulation You cannot print within 4.2mm (50dots in 300dpi mode) on all four sides of the paper. Print Speeds with Various Settings Print speed is up to 22ppm for A4 size and 23ppm for Letter size when loading A4 or Letter size paper from the paper tray in the plain paper mode.

  • Page 25: Telephone

    Telephone Model DCP 7030 DCP 7040 DCP 7045N Handset Chain Dialing Automatic Redial PBX Feature Speaker Phone Hold/Mute Key Music on Hold Volume Handset Volume Speaker Volume Beeper Volume Yes (3 steps + OFF) Ring Volume Quick/ One-Touch Dial Auto Dials Speed Dial Figures of One-Touch &...

  • Page 26

    Model MFC 7320 MFC 7340 MFC 7440N MFC 7840W Handset Chain Dialing Automatic Redial PBX Feature (Europe only) Speaker Phone Hold/Mute Key Music on Hold Volume Handset Volume Speaker Volume Yes (3 steps + OFF) Beeper Volume Yes (3 steps + OFF) Ring Volume Yes (3 steps + OFF) Quick/...

  • Page 27: Fax

    2.10 Fax Model DCP 7030 DCP 7040 DCP 7045N Modem Speed Transmission Speed Mono ITU-T Group Coding Method Color FAX (Document) Send Receive Color FAX (Memory) Send Receive Fax/Tel Switch Super Fine Gray Scale Contrast Smoothing Dual Access Enhanced Remote Activate Station ID Remote Maintenance Remote Access...

  • Page 28

    Model DCP 7030 DCP 7040 DCP 7045N Sending Fax Forward Fax Forward Broadcast Duplex Fax Send Dial Restriction Receiving Easy Receive/Fax Detect Polling Receiving Auto Reduction Duplex Fax Receive Out-of-Paper Reception Fax Rx Stamp List/Report Activity Report/Journal Report Transmission Verification Report Coverpage Help List...

  • Page 29

    33,600bps 14,400bps (Fax) (Fax) Transmission Speed Mono Approx. 2seconds Approx. 6seconds (Brother#1 Std (Brother#1 Std resolution, MMR) resolution, JBIG) ITU-T Group Super G3 Coding Method MH / MR / MH / MR / MMR MMR / JBIG Color FAX (Document)

  • Page 30

    Up to 500 pages (ITU-T Test Chart, Standard Resolution, Up to 400 pages (ITU-T Test Chart, Standard JBIG) Resolution, MMR) Up to 600 pages Up to 500 pages (Brother #1Chart, Standard (Brother Resolution, MMR) #1Chart, Standard Resolution, JBIG) Fax Rx Stamp...

  • Page 31

    Model MFC 7320 MFC 7340 MFC 7440N MFC 7840W List/Report Quick Dial List (empty box is not printed out) Tel Index Numeric List Alphabetic Memory Status List System Setup (User Setting) List Order Form Yes(Europe/Oceania only) (Oceania only) Ref. 1-27 Confidential...

  • Page 32: Copy

    2.11 Copy Model DCP 7030 DCP 7040 DCP 7045N Copy Speed Up to 22cpm(A4)* Up to 22cpm(A4)* Up to 23cpm(Letter) First Copy Out Time less than 15 seconds (from READY mode) Multi Copy Stack Yes (up to 99) Sort Reduction/Enlargement (%) 25% - 400% in 1% increments Resolution (dpi) Print: 600 x 600 dpi, 1200 dpi class...

  • Page 33: Scanner

    2.12 Scanner Model DCP 7030 DCP 7040 DCP 7045N Color/Mono Color Resolution From Glass Maximum 600 x 2400 dpi (color & mono) (Optical) From ADF Maximum 600 x 600 dpi (color & mono) Resolution (Interporated) 19,200 x 19,200 dpi Scanning Speed Monochrome 4.95 seconds (Letter)/5.26 seconds (A4) Full Color...

  • Page 34

    Model MFC 7320 MFC 7340 MFC 7440N MFC 7840W Color/Mono Color Resolution From Glass Maximum 600 x 2400 dpi (color & mono) (Optical) From ADF Maximum 600 x 600 dpi (color & mono) Resolution (Interporated) 19,200 x 19,200 dpi Scanning Speed Monochrome 4.95 seconds (Letter)/5.26 seconds (A4) Full Color...

  • Page 35: Service (not To Be Used In Sales Leaflet)

    2.13 Service (Not to be used in sales leaflet) Model DCP 7030 DCP 7040 DCP 7045N Machine Life 50,000 pages (A4 or Letter) or 5 years Machine Life (ADF) 50,000 pages or 5 years Machine Life (Scans) 50,000 pages or 5 years Monthly Volume 10,000 pages Recommended Monthly Volume...

  • Page 36: Reference 2 Theory Of Operation

    REFERENCE 2 THEORY OF OPERATION GENERAL BLOCK DIAGRAM ADF unit Speaker (There is not this unit to DCP7030) FB unit Battery (Only MFC7320/7340/7440N/ Phone line (Only MFC7840W) 7450/7840N/7840W) Control system Wireless LAN module Internal RAM USB host ( Only MFC7840W ) (Only MFC7840W) Video/Engine BR network...

  • Page 37: Electronics General Block Diagram

    ELECTRONICS GENERAL BLOCK DIAGRAM There is not this unit to DCP7030 ADF sensor FB motor ADF motor CIS unit ADF unit FB unit Registration solenoid High-voltage power supply Edge sensor/Registration T1 solenoid front sensor PCB Toner LED PCB ASSY (emission) Toner sensor PCB unit Registration (light-receiving)

  • Page 38: Mechanics

    MECHANICS Cross-section Drawing ■ Printer part Laser unit Supply roller Develop roller Transfer roller Exposure drum Paper stack lever Eject roller 2 Pinch roller Registration roller Manual feed Back cover slot cover Registration front Fuser unit actuator Eject roller 1 Front feed roller Outer chute Fuser cover...

  • Page 39

    ■ ADF part Separation roller shaft ASSY ADF motor Ejection roller Pressure roller Document cover LF roller Pressure roller Pressure roller Document rear actuator Document front actuator Fig. Ref. 2-4 Ref. 2-4 Confidential...

  • Page 40: Paper Feeding

    Paper Feeding The following figure shows the paper feeding paths. ■ Printer part Manual feed path Rear eject path Paper tray feed path Fig. Ref. 2-5 Ref. 2-5 Confidential...

  • Page 41: Plate-up Function Of The Paper Tray

    3.2.1 Plate-up Function of the Paper Tray The plate of the paper tray is pushed up by the force exerted by the motor not by springs so as to keep paper-feeding performance constant irrespective of the quantity of paper remaining in the tray. This paragraph provides an overview of this function. At the time of inserting the paper tray into the main body of the machine, the plate is kept lowered.

  • Page 42: Paper Supply

    3.2.2 Paper Supply The paper feed roller picks up one or a few sheets of paper from the paper tray every time it is rotated and feeds it to the separation roller. Subsequently, stacks of paper are caught between the separation roller and separation pad, then separated into single sheets. Separation roller Edge actuator Separation pad...

  • Page 43: Paper Registration

    3.2.3 Paper Registration The front-edge position of a sheet of paper after separation by the separation roller is detected by the registration front actuator. When the front edge of the paper reaches the registration roller after being carried for a certain time, it hits the stopped registration roller and the inclination of the paper is corrected.

  • Page 44: Paper Eject

    3.2.4 Paper Eject Toner on paper is fused by the heat roller and pressure roller of the fuser unit. Paper moves along the outer chute and is ejected into the face-down output tray from the eject roller 2 with its print side down. Eject roller 2 Outer chute Eject actuator...

  • Page 45: Paper Feeding From The Manual Feed Slot/paper Eject From The Back

    3.2.5 Paper Feeding from the Manual feed slot/Paper Eject from the Back When manual feeding, one sheet of paper inserted from the manual feed slot presses the registration front actuator, and detects that there is paper, then the paper is fed. When print with the back cover opened, the printed paper is ejected from the back of the machine with its print side up.

  • Page 46: Adf

    The following figure shows the document feeding paths. ■ ADF part Separation roller shaft ASSY ADF motor Ejection roller Pressure roller Document cover LF roller Pressure roller Pressure roller Document rear actuator Document front actuator Fig. Ref. 2-12 Ref. 2-11 Confidential...

  • Page 47

    This mechanism consists of the document cover, the document scanner unit (scanner cover), and the automatic document feeder (ADF). The document scanner unit consists of a scanner top cover, CIS unit, CIS drive ASSY, and scanner base. Document cover ADF & Document cover ASSY Scanner top cover White-level referece film Document scanner unit...

  • Page 48

    This scanner mechanism supports a dual scanning system: ADF scanning and flat-bed scanning. They automatically switch to the former at the start of a scan operation if the document front sensor inside the ADF detects a document. (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.

  • Page 49: Toner Cartridge

    Toner Cartridge 3.4.1 Methods for Detecting and Counting Toner Life “Toner Life End” is displayed in one of two ways. First is when detection is performed by the toner sensor; Second is when the rotation rate of the develop roller reaches its upper limit. (1) Detection by the toner sensor The amount of toner remaining can be detected by checking the imperviousness to light of the toner in the cartridge by means of the transmissive photosensor.

  • Page 50: Toner Life End

    3.4.2 Toner Life End A new toner cartridge can print in standard toner approximately 1,500, with high capacity toner, approximately 2,600 and with starter toner approximately 1,000 in the case of A4 or Letter size single-sided pages in accordance with ISO/IEC 19752. The message “Toner Life End”...

  • Page 51

    ■ High-capacity toner cartridge* Approximately 2600 pages Page/job 3,000 4,663 5,720 6,452 6,988 7,397 7,721 7,982 8,198 8,380 8,534 8,668 Cartridge life 1,915 3,237 4,206 4,945 5,528 6,000 6,389 6,716 6,995 7,235 7,444 7,627 Cartridge life+ON/OFF 2,600 2,600 2,600 2,600 2,600 2,600 2,600...

  • Page 52

    ■ Starter toner cartridge* Approximately 1000 pages Page/job 1,200 1,865 2,288 2,581 2,795 2,959 3,088 3,193 3,279 3,352 3,414 3,467 Cartridge life 1,295 1,682 1,978 2,211 2,400 2,556 2,687 2,798 2,894 2,977 3,051 Cartridge life+ON/OFF 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000...

  • Page 53: New Toner Detection

    3.4.3 New Toner Detection When a toner cartridge is changed, discrimination between new and used toner cartridges is performed by means of the new toner detection mechanism shown below. <New Toner Detection Mechanism> When a new toner cartridge is inserted into the machine, the rib on the reset gear pushes the new toner actuator which turns on (activates) the new toner sensor, allowing the presence of a brand new toner to be detected.

  • Page 54

    <Developing Bias Voltage> The instant when the new toner detection mechanism detects a new toner cartridge, the developing bias voltage is reset. Toner in use tends to have a low printing density at the time of first use, but the density gradually becomes higher after a certain period of use. The properties of the toner is controlled by means of the developing bias voltage.

  • Page 55: Print

    Print 3.5.1 Basic Principle The printing process consists broadly of 5 processes: Primary charging, Exposure, Development, Transfer and Fusing. 1. Primary charging: The surface of an exposure drum is electrically charged. 2. Exposure: A latent image is formed on the surface of the drum by applying laser beam. 3.

  • Page 56: Print Process

    3.5.2 Print Process (1) Charging The flow of the ion charge is controlled by a constant voltage of the corona wire (850V) and the grid is to ensure it is evenly distributed on the drum surface. In order for the laser to create a latent image on the drum, the drum needs to be evenly charged.

  • Page 57

    (2) Exposure The laser beam radiated from the laser diode inside the laser unit are concentrated into a constant width by a slit in the CO lens cell and then reflected by a polygon mirror rotating at high speed. The evenly charged drum is irradiated with reflected light and exposed. The surface potential is lowered by such exposure and a latent image is formed.

  • Page 58

    (3) Development Toner is attracted to the latent image area on the exposure drum where surface potential is lowered due to the exposure. By controlling developing bias voltage supplied to the develop roller, the amount of toner taken to the drum is adjusted to keep printing density constant. Charging Laser beam 450 V to 300 V...

  • Page 59

    (4) Transfer By applying a minus charge to the transfer roller, the toner adhered to the exposured drum is transferred to the paper. Supply roller Develop roller Exposure drum Toner cartridge Transfer roller Toner Fig. Ref. 2-24 Memo : Control of transfer bias The transfer bias applied in the transfer roller is adjusted according to types and sizes of paper so as to keep excellent image quality.

  • Page 60

    (5) Fusing The toner transferred on to the paper passes between the heat roller and the pressure roller in the fuser unit, being fused by heat and pressure. The thermistor detects surface temperature of the heat roller and turns the halogen heater lamp ON and OFF. This ensures that the temperature is kept constant.

  • Page 61: Appendix 1 Toner Cartridge Weight Information

    APPENDIX 1 TONER CARTRIDGE WEIGHT INFORMATION Note: This information is an approximate weight of the toner cartridge. The weight of the toner is likely to be revised by the design change. High-capacity toner cartridge BK (2.6K) (TN-360/2120/2175/2150/2125) Brand New Toner Cartridge Weight 610g(±15g) Toner Weight at Brand New Toner Cartridge 93g(±3g)

  • Page 62: Appendix 2 Glossary

    APPENDIX 2 GLOSSARY ■ ACRONYMS AND TECHNICAL TERMS In this manual and the Service Manual, the manual specific acronyms and technical terms are used in addition to the generally used ones. The table below contains typical acronyms and technical terms that are used throughout these manuals. APIPA Automatic Private IP Addressing ASIC...

  • Page 63

    Toner Empty Toner Transfer * Excluding the acronym shown on the wiring diagram or circuit diagram. App. 2-2 Confidential...

  • Page 64: Appendix 3 References

    APPENDIX 3 REFERENCES This page provides the retrieve information. It is possible to get the instruction of the subject by just clicking on the link below. 1. Error indication (Refer to “2.1 Error indication”, Chapter 1 of the Service Manual.) 2.

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