Brother MFC7420 manual

Confident ial FA CSIMILE EQUIPMENT SERVICE MANUAL MODELS: MFC7420/7820N DCP7010/7020/7025[...]

Confident ial © Copy r ight Brother 2004 All rights reserv ed. No part of this publication may be reproduced in any form or by any m eans without perm ission in writing from the publisher . Specific ations are subj ect to change without notice.[...]

i Confidential PREFA CE This Service Manual is intended for use by serv ice personnel and details the specifications, construction, theory of operation, and m aintenance for the Brother machines noted on the front cover. I t includes information required for troubleshooting and serv ice-- disassembly, reassem bly, and lubrication-- so that service [...]

ii Confident ial CHA PT ER 8 MAINTENA NCE M ODE Describes the m aintenance mode which is exclusively designed for the purpose of checks, setting s and adjustments using the k eys on the control panel. In the m aintenance mode, y ou can update memory (EEPROM: electrically erasable program mable read-only mem ory) contents for optimiz ing the drive c[...]

iii Confidential TA BLE OF CONTENTS CHA PT ER 1 PA RT S NA M ES & FUNCT IONS 1.1 EQUIPM ENT OUTL INE ............................................................................................. 1-1 1.2 CONTRO L PA NEL .................................................................................................... 1-2 1.3 COM PONENTS ......[...]

iv Confidential CHA PT ER 5 DISA SSEM BLY /REA SSEM BLY AND LUBRICA TIO N 5.1 DISA SSEM BLY/REASSEMBLY ............................................................................... 5-1  Safety Precautions ........................................................................................................ 5-1  Tightening T orque ........[...]

v Confidential 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 ...................................................................[...]

vi Confid ential CHA PT ER 7 CLEA NING CHA PT ER 8 MAINTENA NCE M ODE 8.1 ENTRY INT O T HE M A INT ENA NCE M ODE ............................................................. 8-1 8.2 LIST OF MAINTENA NCE M ODE FUNCT IONS ........................................................ 8-2 8.3 USER-A CCESS T O T HE M A INT ENA NCE M ODE ....................[...]

vii Confidential CHA PT ER 9 ERROR INDICA T ION A ND TROUBLESHOOT ING 9.1 ERROR INDICA TIO N ................................................................................................ 9-1 9.1.1 Equipment Errors ................................................................................................. 9-1 [ 1 ] Error mes sages appearing[...]

viii Confidential A PPENDIX 6 CIRCUIT DIAGRA M S NCU PCB: MFC7420 (U.S.A. and CA NA DA models) NCU PCB: MFC7820N (U.S.A. and CA NA DA models) NCU PCB: MFC7420 (EUROPE models) NCU PCB: MF C7820N (EUROPE models) Power Supply PCB 100V (U.S.A . and CA NA DA models) Power Supply PCB 200V (EUROP E models)[...]

Confiden tial ix SA FETY PRECA UTIONS 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 m emory , you need to print them or sav e them before you turn off the power and unplug the MFC. (For MFC- 7420) WARNING There are high v oltage el[...]

Confiden tial x WARNING • When you m ove 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. Ne[...]

Confiden tial xi CHOOSING A LOCA TION Place your MFC on a flat, stable surface that is free of v ibration 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 rem ains between 50°F and 90.5°F (10°C and 32.5° C). CAUTION • Avoid placing your MFC in [...]

Confiden tial CHAPTER 1 PARTS NAMES & FUNCTIONS[...]

Confiden tial CHA PTER 1 PA RTS NAMES & FUNCTIONS This chapter contains external views and nam es of components and describes their functions. Inform ation about the keys on the control panel is included to help y ou check operation or mak e adjustments. CONTENTS 1.1 EQUIPM ENT OUTL INE ..........................................................[...]

1-1 Confident ial 1.1 EQUIPMENT OUTLINE Front view Rear view ADF D ocument Output Support Flap Document Co ver Power Sw itch Front Cover Paper Tray Contr o l Pa nel USB Interface Conn ector Parallel Interface Conn ector 10/100 Baser TX Port (MFC7820N on ly) AC Pow er Connector Back Cover Autom atic Documen t Feeder (ADF) Manual Fe e d Slot Face-dow[...]

1-2 Confident ial 1.2 CONTROL PANEL MFC- 7420 and MFC-7820N h ave sim ilar control k eys. 1. One-To uch K eys 6. Dial Pad Keys These 4 key s give you instant access to 8 previou sly stored nu mbers. 2. Shift Ke y To access One-Touch n umbers 5 to 8, h old down Shift as you pr e ss the One-T ouc h key. Use these k eys to dial telephon e or fax num b[...]

1-3 Confident ial 5. Navigation Keys 11. Copy Keys (Tem porary settings) Enlarge/Reduce Lets y ou reduce or en large copies depending upon the ratio you select. Options You can quick ly and easily select temporary settings f o r copyi ng. 12. Printer Key Menu/Set The sa me key is used for Menu a nd Set o p era tions. Le ts you access th e Menu to p[...]

1-4 Confident ial 1.3 COMPONENTS The equipment consists of the following major components: Scanner Unit Panel Unit Speaker ASSY Joint Cover ASSY Laser U nit Side Cover R PS PCB U nit Frame Un it Front Cover Paper Tray High-vol tage P S P CB Side Cover L Main PCB Battery ASSY Fixing Unit Rear Cover Rear Chu te Cover Inner Chut e N CU PCB ADF Unit[...]

Confiden tial CHAPTER 2 SPECIFICATIONS[...]

Confiden tial CHA PTER 2 SPECIFICA TIONS This chapter lists the specifications of each model, wh ich enables you to mak e a comparison of different models. CONTENTS 2.1 GENERA L .................................................................................................................... .... 2-1 2.1.1 General Specific ations ................[...]

2-1 Confident ial 2.1 GENERAL 2.1.1 General Specification s Memory Capacity 16 MB (MFC-7420), 32 MB (MFC- 7820N) Automatic Document Feeder (AD F ) 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 Crys tal Di splay (LCD) 16 characters x 2 lines Po[...]

2-2 Confident ial 2.1.2 Paper Specifications (1) Paper ty pe Paper type Tray1 Manual f eed slot Select the paper type from the printer driver Plain paper 60 g/m 2 to 105 g/m 2 (16 to 28 lbs.) O O Plain paper Recycled paper O O Recycled paper Bond paper O O Bond paper Thick paper 105 g/m 2 to 161 g/m 2 (28 to 43 lbs.) X O Thick paper or Thicker pape[...]

2-3 Confident ial (4) Recomm ended paper Europe USA Plain paper Xerox Premier 80 g /m 2 Xerox Business 80 g/m 2 Modo Paper DATACOPY 80 g/m 2 IG EPA X -press 80 g /m 2 Xerox 4200DP 20lb Xerox 4024 28lb Ham merm ill Laser Paper 24lb Recycled paper Xerox Recycled Suprem e N/A Transparency 3M CG3300 3M CG 3300 Label Avery laser label L7163 Avery laser [...]

2-4 Confident ial 2.1.3 Printable A rea When using PCL em ulation, the edges of the paper that cannot be printed on are shown below. Portrait A B C D E F G F G E G G Physical page Printable area Logical page B Physical page length D Maximum logical page length F Distance from edge of physical page to edge of logical page NOTE: • “Logical pag e?[...]

2-5 Confident ial The table below shows the printable areas when printing on Portrait for each paper size. Size A B C D E F G Letter 215.9 mm 8.5” (2,550 dots) 279.4 mm 11.0” (3,300 dots) 203.2 mm 8.0” (2,400 dots) 279.4 mm 11.0” (3,300 dots) 6.35 mm 0.25” (75 dots) 0 m m 4.2 m m 0.16” (50 dots) Legal 215.9 mm 8.5” (2,550 dots) 355.6 [...]

2-6 Confident ial Landscape A B C D E F G F G E G G Physical page Printable area Logical page B Physical page length D Maximum logical page length F Distance from edge of physical page to edge of logical page NOTE: • “Logical pag e” shows the printable area for a PCL driver. • “Printable area” shows m echanical printable area of the mac[...]

2-7 Confident ial The table below shows the printable areas when printing on Landscape for each paper size. Size A B C D E F G Letter 279.4 mm 11.0” (3,300 dots) 215.9 mm 8.5” (2,550 dots) 269.3 mm 10.6” (3,180 dots) 215.9 mm 8.5” (2,550 dots) 5.0 mm 0.2” (60 dots) 0 m m 4.2 m m 0.16” (50 dots) Legal 355.6 mm 14.0” (4,200 dots) 215.9 [...]

2-8 Confidential 2.2 SPECIFICATIONS LIST MFC7420/7820N (1/15) US/Canada Europe Asia/Pacific U S/Canada Eu rope Asia/Pacific Mod e l N a me GENERAL Print Engine CPU Speed Back up Clock Operating Environment Temperature Operating Environment Humid ity On/Off Switch AC Cord inlet Demo Print Yes (US only) Yes (US only) Demo Model Starter Toner Starter [...]

2-9 Confidential (2/15) US/Canada Europe Asia/Pacific U S/Canada Eu rope Asia/Pacific Mod e l N a me GENERAL Power Source 120V AC 50/60 (Canada)Hz 120V AC 50/60 (Canada)Hz Power Consumption (Copying) Power Consumption (Sleep/Standby/Peak) Power Save ( CPU Sleep ) Sleep Mode (00-99min : w/ OFF mode) Energy Star Compliant ( USA Only ) Yes Yes Total P[...]

2-10 Confidential (3/15) US/Canada Europe Asia/Pacific U S/Canada Europe Asia/Pacifi c Mod e l N a me TELEPHO NE Telephone Index (Search) Pre-registered for FAX BACK SYSTEM ( USA ) Caller ID Yes N/A Yes (ARL/NZ/SIN/ HK only) Ye s N /A Ye s (ARL/NZ/SIN/ HK only) Call W aiting Caller ID Call waiting Ready ( Onl y for USA ) Distinctive Ringing Yes Yes[...]

2-11 Confidential (4/15) US/Canada Europe Asia/Pacific U S/Canada Europe Asia/Pacifi c Mod e l N a me FAX Memory T rans m is s ion (ITU-T Chart) ECM (Error Correction M ode) Error Re-Transmission Broadcasting Manual Broadcasting Easy Receive/Fax Detect Polling Receiving Auto Reduction Duplex Fax Recei ve Out-of-Paper Reception (ITU-T Chart) PC Fax [...]

2-12 Confidential (5/15) US/Canada Europe Asia/Pacific U S/Canada Eu rope Asia/Pacific Mod e l N am e INTERF ACE Cable included Acceptable Media Card Slot PRINTER Color/Mono Engine Type Resolution Speed(ppm) up to 20ppm (Letter size) up to 20ppm (Letter size) Duplex Printing Speed (ppm) First Prin t Out Time Standard Print Language Emulation Secure[...]

2-13 Confidential (6/15) US/Canada Europe Asia/Pacific U S/Canada Europe Asia/Pacifi c Mod e l N a me COPY Resolution(dpi) Manual Duplex Copy N in 1 Poster Image Enhancement SCANNER Color/Mono Resolution (Hardware) Resolution (Interpolated) Gray Scale Color Depth (Int . / Ext.) Scan Key Scan Image Key Scan / OCR Key Scan to E-mail Key MESSAGE CENTE[...]

2-14 Confidential (7/15) US/Canada Europe Asia/Pacific U S/Canada Europe Asia/Pacific Mod e l N a me BUNDLED SOFTWARE (For Windows) W ebBRAdmin (*5) Network Print Software( LPR ) (*5) Network Pr int Software (NetBIOS/SMTP) Support OS version BUNDLED SOFTWARE (For M AC) Printer Driver TW A IN Viewer (PageManager) Control Center PC Fax (Sending only [...]

2-15 Confidential (8/15) US/Canada Europe Asia/Pacific U S/Canada Euro pe Asia/Pacific Mod e l N a me Optional NE TWORK (*6) Model Name Share Printer Share Scanner Share PC FAX (Send) ACCESSORY Life / Yield ALL- FB 1 MFC-7420 (Toner : Approx. 2,500 page s) NC-2100P (Parallel external print s erver) / NC-2200w (W irel es s USB server) NC-2100 : Yes [...]

2-16 Confidential DCP7010/7020/7025 (9/15) US/Canada Europe Asia/Pacific Mod e l N a me DCP-70 20 GENERAL Print Engine CPU Speed Back up Clock Operating Environment Temperature Operating Environment Humidity On/Off S witch AC Cord inlet Demo Print Yes (US only) Demo Model Starter Toner Starter Simultaneous Operation Input / Output W idth Input / Ou[...]

2-17 Confidential (10/15) US/Canada Europe Asia/Pacific Mod e l N a me DCP-70 20 GENERAL Power Source 120V AC 50/60 (Canada)Hz Power Consumption (Copying) Power Consumption (Sleep/Standby/Peak) Power Save ( CPU Sleep ) Sleep Mode (00-99min : w/ O F F mode) Energy Star Compliant ( USA Only ) Yes Total Print pages Counter (Internal / LCD / Prin t) Co[...]

2-18 Confidential (11/15) US/Canada Europe Asia/Pacific Mod e l N a me DCP-70 20 TELEPHO NE Telephone Index (Search) Pre-registered for FAX BACK SYSTEM ( USA ) Caller ID Call W aiting Caller ID Call waiting Ready ( O n ly for USA ) Distinctive Ringing FAX Modem Speed Tran smission Speed ITU-T Group Coding Method Color FAX (Document Send / Receive) [...]

2-19 Confidential (12/15) US/Canada Europe Asia/Pacific Mod e l N a me DCP-7020 FAX Polling Receiving Auto Reduction Duplex Fax Recei ve Out-of-Paper Reception (ITU-T Chart) PC Fax LIST/REPORT Activity Report/Journal Report Transmissio n Verificatio n Report Cover page Help List Call Ba ck Message Caller ID List Quick D ial List Tel Index List Memo[...]

2-20 Confidential (13/15) US/Canada Europe Asia/Pacific Mod e l N a me DCP-70 20 PRINTER Fonts Disk Ba sed Paper Handling Size LTR, LGL, A4, B5, A5, B6, A6, EXE LTR, A4, B5, A5, B6, A6, EXE LTR, LGL, A4, B5, A5, B6, A6, EXE Manual Feed Slot Paper Type Sheet W eight (Pap er Cassette) (Manual Feed Slot) (ADF) Utility Software Variable Dot Print Shing[...]

2-21 Confidential (14/15) US/Canada Europe Asia/Pacific Mod e l N a me DCP-70 20 MESSAGE CENTER/M ESSAGE MANA GER TAD Ty pe ICM R ec ordi ng Time OGM (MC;M C Pro;Pa ging;F/T) Memo/Recording Conversation Toll Saver Remote Acce ss Fax Retriev al Fax Forw arding Paging BUNDLED SOFTWARE (For Windows) Printer Driver TW AIN (W IA for XP) Viewer (PaperPor[...]

2-22 Confidential (15/15) US/Canada Europe Asia/Pacific Mod e l N a me DCP-70 20 PHOTO CAPTURE CENT ER N/A N/A Standar d NETWORK Share Printer Share Scanner Share PC FAX (Send) Internet FAX (ITU T.37 simp le mo de) Scan to E-mail se rver ITU SUB Addressing Support OS version for PC client Network connection Support Protocols Network M anage me nt O[...]

Confiden tial CHAPTER 3 THEORY OF OPERATION[...]

Confiden tial CHA PTER 3 THEORY OF OPERA TION This chapter gives an ov erview of the scanning and printing mechanisms as w ell as the sensors, actuators, and control electronics. It aids in understanding the basic principles of operation as well as locating defects for troubleshooting . CONTENTS 3.1 OVERVIEW ........................................[...]

Confiden tial 3-1 3.1 OVERVIEW Control Section Centronics parallel interf ace USB interface Host Computer Control panel LAN interface Printer data F ax data Low- and high-voltage power supplies AC LAN (MFC7820N only) P aper feeding mechanism Laser printing unit *Provided on models supporting facsimile function. Charging, exposing, dev eloping, tran[...]

Confiden tial 3-2 3.2 MECHANICAL COMPONENTS Pinc h rol l e r Drum/toner ASSY Paper feed rolle r Regist fr o nt act ua to r Pinc h rol l e r Separation rolle r Tail edge actuato r Pressure rolle r Separation pad Feed rolle r Up plate Regist rear actu ato r Suppl y rolle r Developer rolle r Transfer rolle r Exposu re dru m Brush Pape r Paper tr a y P[...]

Confiden tial 3-3 3.2.1 Scanner Mech anism This mechanism consists of the document cover, the scanner unit (scanner cov er), and the automatic docum ent feeder (ADF). The scanner unit consists of a scanner top cover, CI S unit, CIS drive assem bly, and scanner base. The detailed illustration on the next page shows the com ponents making up the ADF:[...]

Confiden tial 3-4 This scanner mechanism supports a dual scanning system : ADF scanning and flat-bed scanning . They autom atically switch to the former at the start of a scan operation if the docum ent front sensor inside the ADF detects a document. Separate roller shaft ASSY Separation rubbe r ASSY LF rolle r Separate rolle r Suction rolle r Pre [...]

Confidential 3-5 (1) ADF scanning: Document moves across stationary CIS unit Placing a document face up in the document support activates the docum ent front sensor, switching to ADF scanning. The CIS drive mechanism (details below) operates for each scanning com mand executed. The CIS unit first moves to the white-level refe rence film for white l[...]

Confiden tial 3-6 3.2.2 Printing M echanism 3.2.2. 1 Paper s upply The feed roller picks up a few sheets or one sheet of paper from the paper tray every tim e it is rotated and feeds it to the separation roller. Separation pad Pressure rolle r Tail edge actuato r Pinc h rol l e r Regist fr o nt act ua to r Pinc h rol l e r Paper feed rolle r Feed r[...]

Confiden tial 3-7 (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) T he section of the gear 52 P/R , where there is no cog, is norm ally fixed at the position as shown in the figure below by the P/R solenoid ASSY. (3) Therefore,[...]

Confidential 3-8 3.2.2.2 Push-up function of paper tray In order to improve the transfer function of the pa per tray, the pressure plate in the paper tray is lifted up by the motor. (1) The pressure plate comes down while the record ing paper tray is inserted into the machine. When the main motor rotates, it drives through som e gears to actuate th[...]

Confiden tial 3-9 Pickup rol l er hol d er ASSY Paper tr a y Up plate gea r Up plate Gear 17 Pressure plate Sector ca m Hook B Hook C Link leve r Hook A Hook C Hook spri ng Gear 13 center P/R Sector ca m Hook B Link leve r Rotated b y approx. three quarters. < Table side > < Back side >[...]

Confiden tial 3-10 3.2.2.3 Paper registration After the paper top position is detected by the reg ist 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[...]

Confiden tial 3-11 3.2.2.4 Paper eject After the printing im age 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. The paper eject actuator detects whether th[...]

Confidential 3-12 3.2.2.6 Toner cartridge Develops the electrostatic latent image on the e xposure drum with toner and form s the visible image.  Toner life end mode The life of the toner cartridge is starter: 1,500, st andard: 2,500 pages at the 5% coverage. In the case of low- duty printing, “Toner Life End” is indicated by displaying the [...]

Confiden tial 3-13     New toner detection mecha nism The printer detects the amount of the rem aining toner with the sensor and indicates the timing to replace the toner cartridge by displaying ‘T oner Life End’ on the LCD to the user. The problem such as toner leak or image defect m ay occur when low -duty printing is continued fo[...]

Confiden tial 3-14 When the new toner detection switch detects that the toner cartridg e is replaced with a new one, the developing bias voltage is initialized at the sam e time. The toner used for the printer has a property that print density is lig ht first and gradually dark er in the course of usage. The developing bias controls the toner prope[...]

Confiden tial 3-15 3.2.2.7 Print process     Charging The drum is charg ed to approximately 900V by an ion charg e which is generated by the prim ary charger. The charge is g enerated by ionization of the corona wire, which has a DC bias from the high- voltage power supply applied to it. T he flow of the ion charge is controlled by the [...]

Confiden tial 3-16 3. The laser beams reflected by the reflection mirror go straig ht toward the exposure drum below it, then expose the exposure drum. The area exposed to the laser beam is the im age to be printed. The surface potential of the exposed area is reduced, forming the electrostatic image to be printed.     Developing Develo[...]

Confiden tial 3-17     Transf er (1) Transfer process After the drum has been charged and exposed, and has received a developed im age, the toner formed is transferred onto the paper by applying a neg ative charge to the back of the paper. The negativ e charge applied to the paper causes the positively charg ed toner to leave the drum, [...]

Confiden tial 3-18 3.2.3 Sensors and Actuators Sensor name Sensor ty pe Location Cover sensor Mechanical switch Main frame L Toner LED PCB (Light emission) Photo sensor Main frame R Toner sensor PCB (Light reception) Photo sensor Main frame L Paper eject sensor Photo sensor Main PCB Regist front sensor Photo sensor Regist sensor PCB Regist rear sen[...]

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Confiden tial CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR[...]

Confiden tial CHA PTER 4 TRA NSFER OF DA TA LEFT IN THE MA CHINE TO BE SENT FOR REPA IR 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 giv en in this chapter if the machine at the user site cannot print receiv ed data due to the [...]

Confidential 4-1 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. To prevent such data loss, the service personnel s hould instruct end users (e.g., by telep[...]

Confiden tial 4-2 Cover page sample End page sample[...]

Confiden tial CHAPTER 5 DISASSEM BLY/REASSEMBLY A ND LUBRICATION[...]

Confiden tial CHAPTER 5 DIS ASSEMBLY/ REASSEMBLY AND LUBRIC ATION This chap ter details p rocedures for di sassembling and reassem bling the machin e together with related not es. The disasse mbly order flow p rovided enable s you to see at a g lance the qui ckest way to g et to component(s) involved. At the star t of a disassem bly job, you check [...]

Confiden tial 5.1.18 High- Voltage P S PCB A SSY .............................................................................. 5-48 5.1.19 Mai n PCB ........................................................................................................... 5-49 5.1.20 PS PCB Unit ....................................................................[...]

Confiden tial 5-1 5.1 DISASSEMBLY/REASSEMBLY     Safety Prec autions To prevent the creation of s econdary problem s by mishandling , observe the follow ing precautions during mainten ance work. (1) Before s tarting disas sembly/reass embly jobs, unp lug the power cord and telepho ne line . In particu lar, when hav ing access to th e po[...]

Confiden tial 5-2     Tightening Torque Locat ion o f scre w Screw typ e Q'ty Ti ght e nin g torq ue N•m (k gf •cm) Side cover L Taptite, bind B M4x12 2 0.79 ± 0.1 (8 ± 1) Side cover R T aptite, bind B M4x12 2 0.79 ± 0.1 (8 ± 1) Ground wire Taptite, cup S M3x6 1 0.78 ± 0.1 (8 ± 1) Upper document chute Tap tite, cup B M3 x[...]

Confiden tial 5-3     Preparatio n Prior to proceeding w ith the disass embly procedure, (1) Unplug - the modula r j ack of the telephone line, - the USB cable, i f connec ted (not shown below), an d - the modula r j ack of the externa l telephone set if conne cted (not shown bel ow).     How to Access the Object Component ?[...]

Confident ial 5-4     Disassembl y Flowchart 1 2 3 4 5 6 7 8 14 16 18 18 19 19 21 21 31 32 33 31 32 33 19 34 34 20 20 28 28 29 29 39 15 17 15 16 17 10 9 13 12 11 21 24 25 27 27 23 23 22 30 26 37 35 38 36 37 36 AC Cord Drum/Toner ASSY Paper Tray Rear Cover Rear Chute Cover Side Cover L Side Cover R Joint Cover ASSY / Paper Stopper / Batt[...]

Confident ial 5-5 5.1.1 AC Cord (1) Disconnect AC cord from the m achine. 5.1.2 Drum/Toner A S SY (1) Open the front cov er and rem o ve the drum /toner ASSY. AC cord Drum/toner ASSY Machine Front cove r[...]

Confident ial 5-6 5.1.3 Pape r T ray (1) Close the fro nt cover and pull out the paper tray. (2) Remove the pap er from the paper tray. (3) Remove the separat i on pad holder ASSY and the separ ation pad spring. Separation pad holder ASSY Screw d rive r Hooks Separation pad spring Separation pad holder ASSY Paper tr a y Front cove r[...]

Confident ial 5-7 5.1.4 Rear Cover (1) Rem o ve the rear cover. NOTE : Remov e the “A” section of the rear cov er while opening the rear cover sl ightly. Pi n “A” Rear cove r Main frame R Boss Rear cove r Rear cove r[...]

Confident ial 5-8 5.1.5 Rear Chute Cover (1) Rem o ve the rear chute cover. (2) Rem o ve the pap er eject actuato r and the eject actuator spring . Boss Rear chute cov e r Rear chute cov e r Hoo k Paper eject actuato r Rear chute cov e r Paper eject actuato r Paper eject actuato r Rear chute cov e r Paper eject actuato r Hoo k 1 2 3 4 Eject actuato[...]

Confident ial 5-9 5.1.6 Side Cover L (1) Open the front cover. (2) Remove the two b ind B M4x12 taptite screws, and then remove the sid e cover L. Hooks Taptite, bind B M4x12 Front cove r Machine Side cover L Hoo k 1 2 3 Taptite, bind B M4x12[...]

Confident ial 5-10 5.1.7 Side Cover R (1) Remove the two b ind B M4x12 taptite screws, and then remove the sid e cover R. Taptite, bind B M4x12 Taptite, bind B M4x12 1 1 2 3 4 Hoo k Hoo k Side cover R Hoo k[...]

Confident ial 5-11 5.1.8 A DF unit (1) Open the ADF unit and scanner unit. (2) Remove the one cup S M3x6 taptite screw and ADF F G harness and FB FG harne ss. (3) Disconnect th e two connectors o f the ADF unit from th e main PCB. (4) Disconnect th e two connectors o f the scanner un it from the m ain PCB. ADF uni t FFC CIS Main PCB Taptite, cup S [...]

Confident ial 5-12 (5) Close the ADF unit and scanner uni t. (6) Remove the two p i ns and remove the ADF cover. (7) Release the two hooks from the ADF cover and remov e the pressure roller ASS Y. (8) Rem o ve the two LF springs from the ADF cover. Pressure roller ASSY LF spr ing LF spring ADF co ve r Hooks 1 1 3 2 3 Pi n Pi n ADF co ve r Scanner u[...]

Confident ial 5-13 (9) Rem o ve the two p ressure rolle rs from the pre ssure roll er shaft. (10) Open the ADF unit. (11) Release the hook to remove the g ear cover from the ADF unit. Pressure roller sh af t Pressure roller Hoo k Gear cove r Gear cove r ADF uni t[...]

Confident ial 5-14 (12) Close the ADF unit. (13) Remove the separa te roller shaft ASSY and bushing from the ADF unit. (14) Remove the four cu p B M3x10 taptite screws. (15) Release the thre e hooks “A” to remove the uppe r document chute. Separate roller shaft ASSY ADF uni t Taptite, cup B M3x10 Hook “ A ” Hooks “A” U p per docu ment c[...]

Confident ial 5-15 (16) Remove the separa tion rubber ASSY from the upper docum ent chute. (17) Remove the separa tion rubber from the ADF plate spri ng. Separation ru bber ASSY “ A ” “ A ” U p per docu ment ch ute Hoo k Hoo k s ADF plate spring 1 2 3 Separation rubbe r ADF plate spring[...]

Confident ial 5-16 (18) Remove the two cup B M3 x10 taptite screws from the lower document chute. (19) Release the two hook s to rem o ve the lower doc ument chute. NOTE : When re- connecting the conne ctors, put them through the holes on the ADF unit before co nnecting . (20) Release the hook on the A DF unit and rem ove the ejectio n roller ASSY.[...]

Confident ial 5-17 (21) Remove the tw o ejection ro llers from the pressure roll er shaft. (22) Remove the ADF unit e j ection sp ring from the ADF u nit. Pressure roller sh af t Ejectio n roller Ejectio n roller ADF unit ejection sprin g ADF uni t[...]

Confident ial 5-18 (23) Release the two hook s and remov e the resin bearing . (24) Remove the LF roll er ASSY from the l ower document chut e. (25) Release the two hooks “A” and remove the t he ejection rolle r ASSY from the lower document chu te. (26) Release the two hooks “B” and remove the e jection rol l er bea r ing fr om the ejectio [...]

Confident ial 5-19 (27) Remove the two cup B M3x10 ta ptite screws and one cup S M3x6 tapt ite screw from the lower docum ent chute. (28) Remove the driv e frame ASSY from the l ower document c hute. (29) Remove the one bind S M3 x6 taptite screw from the drive fram e ASSY to remov e the ADF mot o r . (30) Remove the ADF m otor harness from the ADF[...]

Confident ial 5-20 NOTE : When re- assembling drive frame A SSY, assemble it so that the arm ASSY is a t the top. (31) Remove the docum ent rear actu ator from the lower docu ment chute. Drive frame ASSY Ar m ASS Y Document rear actu ator Hoo k Lower docum ent chute 1 23[...]

Confident ial 5-21 (32) Remove the docum ent front actua t or fr om the lower docum ent chute. (33) Release the two hooks “A” on the lowe r document chu t e to rem ove the ADF sensor PCB ASSY. (34) Remove the ADF sensor ha rness ASSY. Hoo k Document f ront actuato r Lower docum ent chute 1 2 3 ADF senso r harne ss ASSY Hooks “A” ADF se nso [...]

Confident ial 5-22 (35) Turn the lower docum ent chute upsi de down. (36) Remove the pins and remove the docum ent hold. (37) Remove the docum ent spring from the lower documen t chute. (38) Open the ADF unit. (39) Remove the one bind B M4x12 taptite sc rew from the docum ent cover sub ASSY. (40) Release the hook to remove the do cument cover ASSY [...]

Confident ial 5-23 (41) Remove the two spr ings. (42) Remove the pressu re roller ASSY. (43) Remove the two p ressure rollers from the pre ssure roller sh aft. Pressure roller sh af t Pressure rolle r s Pressure rolle r ASS Y Spring Spring Document cover sub ASSY[...]

Confident ial 5-24 (44) Remove the three cup B M3x10 taptit e screws to rem ove the hinge ASSY L. (45) Remove the hinge f rom the hinge arm . (46) Remove the one bind B M4x12 taptite sc rew to remov e the hinge arm. Document cover sub ASSY Hinge ASSY L Taptite, cup B M3x10 Hinge ar m Hinge Taptite, b ind B M4x12 1 2 3[...]

Confident ial 5-25 5.1.9 Pull Arm/Pull Arm Guide/ Lock Claw Pull Arm Spring (1) Open the scanne r unit. (2) Release the ho ok to remov e the scanner uni t side of the pull arms (R, L). (3) Remove the pul l arm sprin gs and remov e the pull arms (R, L) from the pull arm guides. Scanner uni t Hoo k Hoo k Pull ar m (L) Pull ar m (R) Pull ar m (R) Pull[...]

Confident ial 5-26 5.1.10 Scan ner Unit (1) Disconnec t the flat cable from the m ain PCB. (2) Rem o ve the scanne r unit from the machine. 5.1.11 Pan el Unit (1) Remove the fou r cup B M3x10 tapt ite screws from the scanner un it. (2) Release the four hooks. Flat cable Machine Scanner uni t Hooks Hooks Pane l uni t Taptite, cup B M3x10 Taptite, cu[...]

Confident ial 5-27 (3) Disconnect th e connector fr om the panel PCB ASSY. (4) Release the three hooks to r emove the panel u nit from the scanner unit. (5) Remove the LCD harn ess from the pane l PCB. (6) Release the three hooks “A ” to remov e the panel PCB from the pa nel cover. Boss Hook “ A ” Boss Loc k Loc k Hoo k Pane l co ve r 2 3 H[...]

Confident ial 5-28 (7 ) Re move the ru bbe r ke y. NOTE : Whe n re -ass embl ing t he ru bber key, make su re t hat the key wo rks cor re ctly. (8) Release the two hooks “A” to rem ove the backlig ht guide. Rubber k e y Pane l co ve r Bosse s Bosse s Bosse s Bosse s Bac klig ht guid e Hook “ A ” Hoo k Hooks “A” Hooks Boss Pane l co ve r[...]

Confident ial 5-29 (9) Rem o ve the diffu sion film . (10) Release the two hooks “A” to r emove the LCD. Diffusion fil m Pane l co ve r Bosse s Hooks Hooks “A” LCD 1 2 3 1[...]

Confident ial 5-30 5.1.12 NCU PCB (1) Rem o ve the two bind B M4x12 taptite s crews and one pan (S/P washe r) M3.5x6 screw from the NCU unit . (2) Remove the one p an (S/P washer) M3.5x6 screw from the NCU shield cover to remove the NCU shie ld plate. Taptite, b ind B M4x12 N CU uni t N CU FG harne ss Scre w , pan (S/P washer) M3.5x6 N CU shield co[...]

Confident ial 5-31 (3) Re move the NCU harnes s ASSY. (4) Remove the two cup S M 3x6 taptite screws f r om the NCU shield cover to rem ove the NCU PCB ASSY. 5.1.13 Sp eaker (1) Disconnec t the connector o f the speak er from the m ain PCB. N CU shield cove r N CU PCB ASSY N CU har ne s s ASS Y Taptite, cup S M3x6 1 2 Main PCB Speaker connecto r[...]

Confident ial 5-32 (2) Release the three hooks to r emove the speak er cover. (3) Release the on e hook to rem ove the speaker hol d spring. S p eaker cove r Hooks Hoo k 1 2 3 4 4 1 2 2 Hoo k S p eaker hold spring Hoo k Machine Machine S p eaker hold spring[...]

Confident ial 5-33 (4) Re move t he sp eaker ASS Y. 5.1.14 Joint Cover ASSY /Paper Stopper /B attery ASSY (1) Rem o ve the bin d B M4x12 tapti te screw, and then remove the r ear cover stopp er. Hoo k Hooks Speaker ASSY Machine Main frame R Rear cover s toppe r Taptite, bind B M4x12[...]

Confident ial 5-34 (2) Remove the two b ind B M4x12 taptite screws and the r ear chute cover spr i ng. (3) Remove the inn er chute. NOTE : Re-assem ble the inner ch ute while pushing on to the pinch ro ller of the inner chute with the eject rol le r of the joint cov er ASSY . Taptite, bind B M4x12 Inner c hute Rear chute cov er spring Taptite, bind[...]

Confidential 5-35 (4) Remove the battery ASSY and disconnect the connector. 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. • Used battery should be disposed of according to local regulations. (5) Remove the four bind B M4x[...]

Confident ial 5-36 5.1.15 Front Cover (1) Release the ho ok of the dri ve release cam from the fro nt cover ASSY. (2) Release the hook “A” on th e front cover A SSY from the chu te. (3) Slide the front cover ASSY to the d irection of the a rrow shown in the fig ure below to remo ve it. Hoo k Front cover ASSY Drive release ca m Front cover ASSY [...]

Confident ial 5-37 (4) Remove the paper s topper L. (5) Remove the paper s topper S from the p aper stopper L. Paper stopper L Front cove r Paper stopper L Paper stopper S[...]

Confident ial 5-38 5.1.16 Picku p Ro ller Hold er A SS Y (1) Turn th e printer ups ide down. (2) Remove the six bind B M4 x12 taptite sc rews, and then rem ove the chute base. NOTE : When re- assembling the chute base, check that the bind B M4x12 taptite screws (A) and (B) shown in the figure above are secu red correctl y. FG harness ASSY 5 Taptite[...]

Confident ial 5-39 <How to ch eck> Take the Drum /Toner Unit out f r om the pr inter. Check that the distance between the floo r and the se paration roller co llar of the pick up roller hold er ASSY is 45.5 to 47.5m m by using the plate jig. If not, re- assemble the chu te base. B A 47.5mm More than 47.5mm 45.5mm Less than 45.5mm Separation r[...]

Confident ial 5-40 (3) Remove the sp ring extensio n P/R from the gear 52 P /R. (4) Release the ho ok and remov e the gear 52 P/R. (5) Remove the bush F/R. (6) Remove the F/R roller shaft ASSY. The hole of the main frame L Bush F/R Hoo k Spring e xte nsio n P/R Printer top sid e (Printer body Upside dow n) F/R roller shaft ASSY Main frame L Gear 52[...]

Confident ial 5-41 (7) Remove the l i nk lev er from the hook of the pickup roll er holder ASSY. (8) Rem ove the pickup roller h older ASSY. NOTE : The pickup r oller holde r spring is as sembled on the b ottom of the pickup roller holder ASSY. Be care ful not to lose the spri ng. Pickup rol l er hol d er ASSY Chute Printer top side (Printer bo dy [...]

Confident ial 5-42 5.1.17 Fixin g Unit (1) Disconnec t the heater harne ss connector and thermistor harness connecto r . (2) Remove the two cup B M4 x12 taptite screws, and then rem ove fixing unit. NOTE : Be sure not to touch the pre ssure roller. (3) Remove the two PR spr ing. (4) Remove the pressu re roller ASSY (pre ssure roller, PR arm ASSY, P[...]

Confident ial 5-43 (5) Remove the two PR arm ASSY and two PR bush from the pressure roll er. (6) Release each ho ok of the spring s from the fu ser frame and rem ove the four separate claw ASSYs. NOTE : Be careful not to damage the heat roller when rem oving the separate cl aw ASSY. PR arm ASSY PR bu sh Pressure rolle r PR bu sh PR arm ASSY Fuser f[...]

Confident ial 5-44 (7) Remove the two p an (S/P washer) M 3x8 screws. (8) Remove the hea t roller. (9) Remove the ha logen heater. Screw, pa n (S/P w asher) M3x8 Heat rolle r Halo gen he a te r Screw, pa n (S/P w asher) M3x8 Fuser frame[...]

Confident ial 5-45 NOTE : When re- assembling the heat roller, assemble t he HR bush onto the fuser fram e referring to the figure below . NOTE : When re- assembling the halogen heat er, put the halo gen heater onto the fuser fram e so that the te rminal of t he heater harne ss is at the top, an d secure the s crews in the order shown in the f igur[...]

Confident ial 5-46 (10) Remove the HR gear. (11) Rem o ve the two HR bush. (12) Rem o ve the th ermistor ASSY harne ss from the four hooks. (13) Remove the cup B M3x12 tapti t e screw, and then remov e the thermisto r ASSY. Heat rolle r HR b ush Hooks HR b ush HR gea r Return the hook to the original position. HR gea r Return the hook to the origin[...]

Confident ial 5-47 NOTE : When re- assembling the thermistor ASSY to the fu ser frame, ensure the direct ion of the the r m istor ASSY is co rrect referr ing to the fig ure below; Fuser frame Heat rolle r Thermistor ASSY Taptite, cup B M3x12[...]

Confident ial 5-48 5.1.18 High-Volt age PS PCB ASSY (1) Disconnect th e three conne ctors from the hig h-voltage PS PCB ASSY. (2) Disconnect th e high-voltag e PS PCB harness from the main PCB. (3) Remove the two b ind B M4x12 taptite screws and the tw o cup S M3x6 taptite sc rews. (4) Remove the hig h-voltage PS PCB from main frame L. High -voltag[...]

Confident ial 5-49 5.1.19 Main PCB < DCP70 10/7020/70 25, M FC7420 > (1) Disconnec t the thirtee n connectors from the m ain PCB. (2) Remove the fiv e cup S M3x6 taptite scr ews and FG harness ASSY 6. (3) Rem o ve the two flat S M3x8 tap tite screws. (4 ) Re mo ve t h e ma i n P CB f ro m ma i n f r ame L . NOTE : When replac ing the m ain PC[...]

Confident ial 5-50 < MF C7820N > (1) Disconnec t the thirtee n connectors from the m ain PCB. (2) Remove the fiv e cup S M3x6 taptite scr ews and FG harness ASSY 6. (3) Rem o ve the two flat S M3x8 tap tite screws. (4 ) Re mo ve t h e ma i n P CB f ro m ma i n f r ame L . NOTE : When replac ing the m ain PCB, refer to ‘ ADJUSTMENTS AND UPDA[...]

Confident ial 5-51 5.1.20 PS PCB Unit (1) Rem o ve the duct f ilm. (2) Remove the pan (S/P washer) M3.5 x 6 screw and FG harne ss ASSY 1. (3) Remove the pan (S/P w asher) M3.5 x 6 screws and FG harne ss ASSY 5. (4) Remove the pan (S/P washer) M3.5 x 6 sc rews and NCU FG harnes s. (5) Remove the two c up S M3x6, taptite screws. (6) Remove the LV shi[...]

Confident ial 5-52 (8) Remove the pan (S/P washer) M3.5x 6 screw, and th en remove the g round wire. (9) Remove the bind B M4x 12, taptite screw, and then rem ove the LV shield pl ate. (10) Rem o ve the two flat S M3x8, tapti t e screws, an d then rem o ve the inle t harness ASSY. Main frame R LV shield plate Gro und wire Screws, pan (S/P wash er) [...]

Confident ial 5-53 (11) Remove the two c up S M3x6 taptite scr ews. (12) Disconnec t the th ree connectors f rom the PS PCB unit, and t hen remove the PS PCB unit. NOTE : When disconnec ting the conne ctors, disconnec t the regist senso r PCB connector and toner LED PCB un it ASSY connector first, lift up the PS PCB unit from the LV shield p late, [...]

Confident ial 5-54 5.1.21 Laser Unit (1) Remove the cup S M3x6, taptite screw (A) and FG h arness ASSY 6. (2) Remove the fou r cup S M3x6, taptite screws (B). (3) Remove the la ser unit. Taptite, cup S M3x6 (B) Main frame R Taptite, cup S M3x6 (B) FG harness ASSY 6 Main frame L Laser uni t Taptite, cup S M3x6 (A)[...]

Confidential 5-55 (4) Remove the filter ASSY from the air duct. (5) Remove the two cup S M3x6, taptite screws, and then remove the air duct. NOTE : • When replacing the laser unit, replace the ba rcode label attached on the gear plate calking ASSY with a new one supplied with a new unit. • Another barcode label supplied with a new unit is spare[...]

Confident ial 5-56 5.1.22 Sub Chute ASSY (1) Remove the two b ind B M4x12, taptite screws, and the n remove the sub chute ASSY. Chute Taptite, bind B M4x12 Sub chute ASSY Taptite, bind B M4x12[...]

Confident ial 5-57 5.1.23 Link Lev er (1) Turn the p rinter body ups ide down. (2) Pull the “A” se ction outwar ds and remov e the link lever. NOTE : When re- assemblin g the link lev er, insert the e nd of the link lev er into the main frame L referring to the figure be low. Link le ve r “A” Printer top sid e (Printer bo dy upside down ) 2[...]

Confident ial 5-58 5.1.24 T ail Edge Actuator (1) Rem o ve the tail edge actuat or with the tai l edge spring. (2) Rem o ve the ta il edge sp ring from the tail edge actuator. 5.1.25 Regist Front Actua t or/Regist Front Spring (1) Remove the reg ist front ac tuator with th e regist front s pring. (2) Rem o ve the reg i st fron t spring from the reg[...]

Confident ial 5-59 5.1.26 Regist Sensor PCB ASSY (1) Remove the bin d B M3x6, taptite s crew. (2) Release the h arness from the hook and rem ove the regist senso r PCB ASSY. 5.1.27 Regist Rear Actuator/R egist Rear Sp ring (1) Rem o ve the reg i st rea r spring. (2) Rem o ve the reg i st rea r actuator. Taptite, bind B M3x6 Regist se nsor P CB ASSY[...]

Confident ial 5-60 5.1.28 Fan M otor 60 Un it (1) Remove the th ree bind B M4x12, t aptite screws and three FG harness ASSY 1, 4, 5. (2) Remove the bas e plate. (3) Release the h arness from th e hook, and then remove the fan m otor 60 unit from the m ain frame R . Taptite, bind B M4x12 FG harness ASSY 1 FG harness ASSY 5 FG harness ASSY 4 Base pla[...]

Confident ial 5-61 5.1.29 Toner LED PCB ASSY/LE D Holder (1) Rem o ve the ton er LED PCB A SSY from the m ain fram e R. (2) Remove the LED hold e r from the toner LED PCB ASSY. Toner LED PCB ASSY 2 1 1 Pi n LED ho ld e r Toner LED PCB ASSY Hoo k Hoo k Hooks Main frame R[...]

Confident ial 5-62 5.1.30 New Toner A ctu ator/New Toner Ac tuator Spring (1) Remove the new t oner actuator sp ring. (2) Release the hook and remove the new t oner actuator fr om the main fram e L. 5.1.31 New Toner Sensor (1) Release the two hook s and remov e the new toner senso r from the main fram e L. Main frame L N ew toner actuator s p ring [...]

Confident ial 5-63 5.1 .32 Cover S ensor (1) Release the two hooks and rem ove the cover sensor from the main f rame L. 5.1.33 Toner Sensor PCB A S SY (1) Remove the cup B M3x6, taptite sc rew, and then remov e the toner sensor PCB A SSY. Hoo k Cover se nso r Hoo k 1 1 Main frame L Cover se nso r 2 Main frame L To ner senso r PCB ASSY Taptite, cup [...]

Confident ial 5-64 5.1.34 M ain M otor A S SY (1) Remove the H V PS ins ulation sheet. (2) Remove the fiv e bind B M4x12, taptite sc rews, and then rem ove the gear p late calking ASSY. (3) Remove the three cup S M3x6, tapt ite screws, and the n remove the m ain motor ASSY. Main frame L Gear plate calking ASSY Taptite, bind B M4x12 HVPS insulation [...]

Confident ial 5-65 5.1.35 Dev elop Jo int (1) Remove the dev elop joint f rom the gear pl ate calking ASSY. 5.1.36 P/R Solenoid ASSY (1) Remove the bin d B M3x10, tapti t e screw. (2) Remove the P/R s olenoid ASSY, the P/R soleno id lever and th e solenoid rel ease spring P/R. P/R solenoid leve r Solenoid release spring P /R P/R solenoid ASSY Tapti[...]

Confident ial 5-66 5.1.37 F/R Solenoid A SSY (1) Remove the g ear ASSY from the main frame L. NOTE : The gear A SSY contains the sm all gears. B e careful not to lose them by disassem bling the g ear ASSY. Gear ASSY Main frame L Gear 40/54 F/ R Gear 45 arm F/R Gear 17 planetary F/ R Gear center F/R[...]

Confident ial 5-67 (2) Remove the bin d B M3x10, tapti t e screw. (3) Remove the F/R s olenoid ASSY, the F/R soleno id lever and th e solenoid rel ease spring F/R. F/R soleno id ASSY Taptite, bind B M3x10 Main frame L F/R solenoid leve r Solenoid release spring F/ R 1 2[...]

Confident ial 5-68 5.1.38 Main Frame L (1) Remove the two b ind B M4x12, taptite screws, and the n remove the m ain frame L. Main frame L Chute Taptite, bind B M4x12 Main frame L[...]

Confident ial 5-69 5.1.39 Main Frame R (1) Remove the th ree bind B M4x12, t aptite screws, and then remov e the main fram e R. Chute Main frame R Taptite, bind B M4x12 Main f rame R[...]

Confident ial 5-70 5.1.40 Harness Routing Laser unit 1 FG harness ASSY 1 / FG harness ASSY 5 2 Laser unit LD harness 5P Polygon motor connector FG harness ASSY 1 FG harness ASSY 1 FG harness ASSY 5 FG harness ASSY 5 Adhesion tape Hole Hole Hole Chute Binder T oner LED PCB harness Regist sensor PCB harness PS PCB harness Hole Hook Main PCB Printer t[...]

Confident ial 5-71 Laser unit FG harness ASSY 6 3 Regist sensor PCB ASSY 4 FG harness ASSY 6 Hole Hole Hook Rib Rib Hook Main PCB Chute Regist sensor PCB ASSY PS PCB unit Printer top side (Printer body upside down)[...]

Confident ial 5-72 Fan motor 60 unit Fan motor 60 unit T oner LED PCB ASSY PS PCB unit Hole Hole Hole Hole Hooks Main PCB Hook Hook Hooks Printer top side (Printer body upside down) 5 T oner LED PCB ASSY 6 Binder FG harness ASSY 5 Regist sensor PCB harness[...]

Confident ial 5-73 T oner sensor PCB ASSY 7 P/R solenoid ASSY / F/R solenoid ASSY 8 Hook Hook Hook High-voltage PS PCB ASSY High-voltage PS PCB ASSY F/R solenoid ASSY P/R solenoid ASSY T oner sensor PCB ASSY[...]

Confident ial 5-74 New toner sensor / Cover sensor / Battery harness 9 10 Panel unit Cover sensor New toner sensor Holes Hole Hook Hook Panel PCB Panel unit Document scanner Hook Hooks Hole Main PCB Main PCB Battery harness Rib[...]

Confident ial 5-75 ADF unit 11 Document scanner 12 Hooks Hole Hole Hole Hole Hole Hole ADF motor ADF sensor PCB ADF unit Document scanner Document scanner ADF FG harness FB FG harness FB motor harness FFC CIS harness Joint cover ASSY Joint cover ASSY Main PCB Main PCB[...]

Confident ial 5-76 NCU FG harness NCU PCB 13 NCU PCB Hole Main PCB NCU FG harness 14 NCU unit Hole L V shield unit NCU FG harness Joint cover ASSY[...]

Confident ial 5-77 15 Speaker ASSY Hook Hook Hook Ribs Rib Rib Speaker ASSY Front Main PCB Main PCB Joint cover ASSY Joint cover ASSY[...]

Confident ial 5-78 5.2 LUBRICATION MU4 MU4 * BG4: KANTO KASEI BG - MU (4 m m dia. Ball) PG2 * PG2: PG- 661 (2 m m dia. Ball) DEV drive gear Gear plate calking ASSY Pendul um gear 22/50 Pickup rol l er hol der ASSY[...]

Confiden tial CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT[...]

Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT This chapter details adjustments and updating of settings, which are required if m ain PCB and some other parts have been replaced. CONTENTS 6.1 IF YOU REPLACE THE MAIN PCB ................................................................................ 6-[...]

6-1 Confidential 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 8.4.1 . [ 3 ] Customize the EEPROM on the main [...]

6-2 Confidential 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 nam e. (3) Check the port (USB) which the machine is connected through. (4) Select ‘Adjust Scanner[...]

Confiden tial CHAPTER 7 CLEANING[...]

Confiden tial CHA PTER 7 CLEA NI NG For the cleaning procedures of the drum unit and toner cartridge, refer to the User's Guide.[...]

Confidential CHAPTER 8 MAINTENANCE MODE[...]

Confidential CHAPTER 8 MAINTENANCE MODE This chapter describes the maintenance mode whic h 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 m achine concerned. In addition, you can perform operati onal checks of [...]

8-1 Confidential 8.1 ENTRY INTO THE MAINTENANCE MODE MFC7420/7820N Press the Menu/Set and Start keys. Next press the key four times to make the machine enter the maintenance mode. TIP: FAX models equipped with numerical keypad s can enter the ma intenance mode in the same way as conventional models; that is, by pressing the Menu/Set , * , 2 , 8 , 6[...]

8-2 Confidential 8.2 LIST OF MAINTENANCE-MODE FUNCTIONS Maintenance-mode Functions Function Code Function Reference Section (Page) 01 EEPROM Parameter Initialization 8.4.1 (8-5) 05 Printout of Scanning Compensation Data 8.4.2 (8-6) 06 Placement of CIS Unit Position for Transportation 8.4.3 (8-8) 08 ADF Performance Test 8.4.4 (8-9) 09 Test Pattern 1[...]

8-3 Confidential 8.3 USER-ACCESS TO THE MAINTENANCE MODE Basically, the maintenance-mode functions liste d 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, [...]

8-4 Confidential 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. (3) To make the machine return to the standby state, press the Stop/Exit key. When each of [...]

8-5 Confidential 8.4 DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS 8.4.1 EEPROM Parameter Initia lization (Function code 01/91)  Function The machine initializes the parameters, user switc hes, and firm ware switches registered in the EEPROM, to the initial values. Entering the function code 01 initializes all of the EEPROM areas, but enter[...]

8-6 Confidential 8.4.2 Printout of Scanning Compensation Data (Function code 05)  Function The machine prints out the white and black level data for scanning compensation.  Operating Procedure Do not start this function merely after poweri ng on the equipment but start it after carrying out a sequence of scanning operation. Unless the equipme[...]

8-7 Confidential Scanning Compensation Data List a) b) c) d) e) f) g) h) i) j ) k) l) m) n) q)[...]

8-8 Confidential 8.4.3 Placement of CIS Unit in Positi on for Transportation (Function code 06)  Function This function is to move the CIS unit in positi on for transportation located at the right end. When you fix the FAX equipment and check its ope ration, you need to perform this function right before packing and shipping it. NOTE: Please ins[...]

8-9 Confidential 8.4.4 ADF Performance Test (Function code 08)  Function The machine counts the documents fed by the automatic docum ent 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. READY" will appear on the LCD.[...]

8-10 Confidential 8.4.5 Test Pattern 1 (Function code 09)  Function This function, much like the copying function, pr ints out test pattern 1 to allow the service personnel to check for record data missing or print quality.  Operating Procedure MFC7420/7820N Press the 0 and 9 keys in this order in the initial stage of the maintenance mode. DC[...]

8-11 Confidential 8.4.6 Firmw are Sw itch Setting and Printout 8.4.6.1 Firmw are sw itch setting (Function code 10)  Function The machine incorporates the following firmware switch functions which m ay be activated with the procedures using the c ontrol panel keys and buttons. The firmware switches have been set at the f actory in conformity to [...]

8-12 Confidential 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 Monitor of[...]

8-13 Confidential 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. (2) Press the key or key to display the firmware switc h which is desired to be changed on[...]

8-14 Confidential 8.4.6.2 Printout of firmware sw itch data (Function code 11)  Function The machine prints out the setting items and c ontents 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 d[...]

8-15 Confidential Configuration List[...]

8-14 Confidential 8.4.6.2 Printout of firmware sw itch data (Function code 11)  Function The machine prints out the setting items and c ontents 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 d[...]

8-17 Confidential 8.4.8 Operational Check of Control Panel PCB (Function code 13)  Function 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[...]

8-18 Confidential 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?[...]

8-19 Confidential (2) Change the detecting conditions to ch eck 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 th e paper outlet, insert p[...]

8-20 Confidential 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 [...]

8-21 Confidential Cover page sample End page sample[...]

8-22 Confidential 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. The “SCAN START ADJ.” will appear on th[...]

8-23 Confidential MAINTENANCE ACCEPTED 1. ADF 2. FB SCAN ST ART ADJ. + - + - + - MAINTENANCE MAINTENANCE 5 and 4 selec t 2 second late r 1 or 2 selec t Menu/Set key Stop/E xit key Stop/Exit key key key 1 second late r key key Menu/Set key[...]

8-24 Confidential 8.4.12 Acquisition of White Level Data and CIS Scanner Area Setting (Function code 55)  Function This function allows the machine to obtain wh ite level data for the CIS scanner and save it together with the CIS scanner area into the EEPROM on the main PCB.  Operating Procedure (1) MFC7420/7820N Press the 5 key twice in the [...]

8-25 Confidential 8.4.14 EEPROM Customizing (Function code 74)  Function This function allows you to customize the EEPROM according to language, function settings, and firmware switch settings. Th e custom izing codes list is given in Appendix 3. NOTE: If you replace the main PCB, be sure to carry out this procedure.  Operating Procedure (1) [...]

8-26 Confidential 8.4.15 Display of the Equipment’s Log Information (Function code 80)  Function 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 t[...]

8-27 Confidential 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: Num ber of pages picked up from the manual tray A4+LTR: Numbe[...]

8-28 Confidential 8.4.16 Machine Error Code Indication (Function code 82)  Function This function displays an error code of the last error on the LCD.  Operating Procedure (1) MFC7420/7820N Press the 8 and 2 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 “[...]

8-29 Confidential 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[...]

Confiden tial CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING[...]

Confiden tial CHA PTER 9 ERROR INDI CA TION AND TROUBLESHOOTING This chapter details error messag es and codes that the incorporated self-diag nostic functions display if any error or malfunction occurs. I f any error messag e appears, refer to this chapter to find which com ponents should be checked or replaced. The latter half of this chapter pro[...]

Confiden tial 9-1 9.1 ERROR INDICATION To help the user or the service personnel prom ptly locate the cause of a problem (if any ), the facsimile equipm ent incorporates the self-diag nostic functions which display error messag es for equipment errors and com munications errors. For the comm unications errors, the equipment also prints out the tran[...]

Confiden tial 9-2 ERROR MESSAGE CAUSE ACTION Print data is left in the MFC’s memo r y. Re-start printing from your com puter. Data Rem aining Print data is left in the MFC’s mem ory. The USB cable w as unplugg ed while the computer was sending the data to the MFC. Press Job Cancel . The MFC will cancel the job and clear it from the memo r y. Di[...]

Confiden tial 9-3 ERROR MESSAGE CAUSE ACTION Machine too Hot T he inside of the machine is too hot. Make sure that the fan in the MFC is spinning and the exhaust outlet is not blocked by something. I f the fan is spinning, rem ove some obstacles around the exhaust outlet, and then leave the MFC turned on but do not use it for several m inutes. If t[...]

Confiden tial 9-4 ERROR MESSAGE CAUSE ACTION Scanner Locked The scanner glass’s sensor does ot mov e to the home position. (For MFC-7420) Check whether the MFC has faxes in its mem ory. I f there are faxes save them. Then, turn off the MFC and then on again. (For MFC-7820N) Turn off the MFC and then on again. The toner cartridge and drum unit ass[...]

Confidential 9-5 [ 2 ] Error codes show n in the "MACHINE ERROR X X " message Error Code (Hex) Symptom Probable Cause Solution 56 The back cover is opened. The back cover is opened. Close the back cover. 57-5A Not used. New toner actuator lever broken Replace the new toner actuator. 5B New toner sensor Error (New toner sensor stays on) Ne[...]

Confidential 9-6 The solution when Error Code 76,77,78 shown in the machine: It’s possible that the temperat ure of the heater rises when these kinds of error occur. Therefore, the heater is programmed to turn off the power fo r 10 m inutes after the switch is on for the safety concern when the error occurs. To help the heater work properly, it?[...]

Confidential 9-7 The paper ejection roller does not rotate correctly Replace the paper ejection roller. Foreign materials in the paper path. Remove foreign materials. Registration sensor actuator caught on the surrounding parts Correct the surrounding parts on which the actuator caught. Registration sensor broken Replace the sensor PCB. 84 Recordin[...]

Confidential 9-8 Error Code (Hex) Symptom Probable Cause Solution 89 Not used. 8A The paper feed m otor does not rotate. (Not used.) 8B The paper feed motor stops suddenly. (Not used.) 8C Not used. 8D-A0 Not used. A1 Front cover (scanner unit) opened. Hook of the front open switch on the front cover broken Replace the front cover. Front open switch[...]

Confidential 9-9 Error Code (Hex) Symptom Probable Cause Solution AD-AE Not used. CIS flat cable broken or not connected Correct the cable connection. Replace the scanner cover (scanner unit). CIS motor harness not connected properly Correct the harness connection. CIS defective Replace the scanner cover (scanner unit). AF CIS positioning error. Ma[...]

Confidential 9-10 Error Code (Hex) Symptom Probable Cause Solution BC Not used. CIS defective Replace the scanner cover (scanner unit). BD Black level data error. Main PCB defective Replace the main PCB. BE Scan starting edge detection error. (Not used.) BF-CF Not used. D0-DF Modem error. Main PCB defective Replace the main PCB. E0-E3 Not used. E4 [...]

Confiden tial 9-11 9.1.2 Communicatio ns Errors If a com munications error occurs, the facsim ile equipment (1) emits an audible alarm (intermittent beeping) for approxim ately 4 seconds, (2) displays the corresponding error m essage, and (3) prints out the transmission v erification report if the equipment is in sending operation.     [...]

Confiden tial 9-12 (3) Compatibility [checking the NSF and DIS] Code 1 Code 2 Causes 32 01 Remo te terminal only with V.29 capability in 2400 or 4800 bps transmission. 32 02 Remo te terminal not ready for polling . 32 10 Remote term inal not equipped with password function or its password switch OFF. 32 11 Remote term inal not equipped with or not [...]

Confiden tial 9-13 (5) Command reception [ checking th e NSF and DIS after t ransmission of NSS an d DCS] Code 1 Code 2 Causes 50 01 Vertical resolution capability chang ed after compensation of backg r ound color. (6) ID ch ecking Code 1 Code 2 Causes 63 01 Password plus "lower 4 digits of telephone num ber" not coincident. 63 02 Passwor[...]

Confidential 9-14 (10) Video signal reception Code 1 Code 2 Causes A0 03 Error correction sequence not terminated even at the final transmission speed for fallback. A0 11 Receive buffer empty. (5-second time-out) A0 12 Receive buffer full during operation except receiving into memor y. A0 13 Decoding error continued on 500 lines. A0 14 Decoding err[...]

Confiden tial 9-15 9.2 TROUBLESHOOTING 9.2.1 Intr oduction This section gives the serv ice personnel some of the troubleshooting procedures to be followed if an error or malfunction occurs with the facsim ile equipment. I t is impossible to anticipate all of the possible problems which m ay occur in future and determ ine the troubleshooting procedu[...]

Confiden tial 9-16 9.2.4 Troubleshooting Based on Problem Type [ 1 ] Paper feeding proble ms Even if the paper is printed and ejected without any problem s such as paper j ams, paper feeding problems below m ay appear. Users can clear these problem s by following the ‘User C heck’ items for each problem . Even if the same problem occurs again, [...]

Confiden tial 9-17 F-3 Pag e skew User Check (1) Check that the paper or other m edia is loaded into the paper tray correctly and that the paper guides are not too tig ht or too loose against the paper stack. (2) I f using the m anual feed slot, check how to load paper into the m anual feed slot correctly. (3) The paper tray m ay be too full. Load [...]

Confiden tial 9-18 [ 2 ] Software setting problems The printer may not print the data correctly if there are incorrect software settings. S-1 “There was an error writing to LPT1: (or BRUS B) for the printer” error messag e appears. User Check (1) Check that the printer cable is not dam aged or broken. Check also that the cable is connected to t[...]

Confiden tial 9-19 S-2 Although the USB driv er 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; i) 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. iv) Turn the printer on. v) ?[...]

Confiden tial 9-20 S-3 This printer does not appear in Chooser (Mac OS ® 9.1 to 9.2) or Print center (Mac OS ® X 10.2.4 or greater). User Check (1) Check the printer is turned on. (2) Check the USB cable is connected correctly. (3) Check the printer driv er is installed correctly. Possible cause Step Check Result Remedy Printer connection 1 Selec[...]

Confiden tial 9-21 [ 3 ] M alfunction When taking countermeasures for malfunctions as described in this section, check connectors for contact failure before measuring the voltage at the specified connector pins. M-1 No AC power supplied Possible cause Step Check Result Remedy Supply vol ta ge 1 Is the correct voltag e present at the outlet? No Info[...]

Confiden tial 9-22 WARNING: If you analy ze malfunctions with the power plug inserted into the power outlet, special caution should be exercised even if the power sw itch is OFF because it is a single pole switch M-3 Main m otor failure Possible cause Step Check Result Remedy Failure of connector 1 Is the connection of connector CN9 on the main PCB[...]

Confiden tial 9-23 M-5 Insufficient output from high-v oltage power supply unit Possible cause Step Check Result Remedy High -vol ta ge contact 1 Do any of the terminals on the high- voltage contacts have dirt or contact burns? Yes Clean the terminals. Yes Replace the high- voltag e power supply PCB. High -vol ta ge power supply PCB 2 Check the con[...]

Confiden tial 9-24 M-8 Fixing unit failure Possible cause Step Check Result Remedy Poor thermistor harness contact 1 Is the contact of connector CN19 on the main PCB good? No Reconnect the connector. Blown thermal fuse 2 Remove the fixing unit and measure the resistance between the therm ostat. Is it open circuit? Yes Replace the fixing unit. Yes R[...]

Confiden tial 9-25 M-10 Pickup function of paper tray does not work . Possible cause Step Check Result Remedy Link lev er does not mov e smoothly . 1 Does the link lever w ork? Isn' t the link lever bent? Yes Remov e the cause of non- smooth operation of the link lever. Replace the link lev er. Pickup roller holder ASSY does not mov e smoothly[...]

Confiden tial 9-26 M-12 Maxim um speed is slow. Possible cause Step Check Result Remedy Two or more sheets of the paper in the tray are pulled to feed. 1 Does paper double feeding occur? Yes Replace the separation pad. Foreign body attached to the tail edge actuator 2 Is a foreign body caug ht on the tail edge actuator? Yes Remov e a foreign body. [...]

Confiden tial 9-27 [ 4 ] Image defects 1-1 Li ght 1-2 Dark 1-3 Com pletel y blank 1-4 A ll bl ack 1-5 Dirt on th e back of paper 1-6 Bl ack vertical streaks 1-6 Bl ack verti cal streaks 1-7 Bl ack hori zontal stri pes 1-8 Black v ertical streaks 1-9 Wh ite vert ical streaks Print out test print out test print out test Print out test print o Print o[...]

Confiden tial 9-28 I-1 Light User Check (1) Check the printer’s env ironment. Conditions such as humidity , high temperatures, etc. m ay cause this situation to occur. (2) If the whole pag e is light, toner save m ode may be on. Disable toner sav e mode w ithin Printer Properties tab of the driver. (3) Try installing a new toner cartridge or drum[...]

Confiden tial 9-29 I-2 Dark User Check (1) Check the paper used meets the recomm ended paper specifications. (2) Check the printer’s env ironment. High tem perature and high hum idity conditions can increase the amount of back ground shading. (3) Clean the corona wire with the w i re cleaner. (4) Try installing a new toner cartridge or drum unit.[...]

Confidential 9-30 I-3 Completely blank Possible cause Step Check Result Remedy Ground contacts Developing bias contact failure 1 Are the developing bias contacts between the printer body and drum unit dirty? Yes Clean the electrodes at both sides. (4) Yes Clean the shaft and the electrode. (1) Drum unit 2 Are the drum shaft and drum electrode of th[...]

Confiden tial 9-31 I-4 All black User Check (1) Clean the corona wire of the drum unit. (2) The drum unit m ay be damag ed. Install a new drum unit. Possible cause Step Check Result Rem edy Ground contac ts 1 Is the corona wire dirty? Yes Clean the corona wire with the wire cleaner. (2) 2 Is the corona wire broken? Yes Replace the drum unit. Corona[...]

Confidential 9-32 I-5 Dirt on the back of paper Possible cause Step Check Result Remedy Fixing unit dirty 1 Is the pressure roller dirty? Is any other area in the printer dirty? Yes Clean the pressure roller referring to the following procedure. Yes Replace the drum unit Dirt in the drum unit 2 Is the transfer roller dirty? Is the problem solved af[...]

Confiden tial 9-33 I-6 Black and blurred vertical streak s 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 cartridg e is not empty. (4) The drum unit m ay be damag ed. Install a new drum unit. (5) The toner cartridge m ay be damag ed. Install a new toner cartri[...]

Confiden tial 9-34 I-7 Black and blurred horiz ontal stripes User Check (1) The drum unit m ay be damag ed. Install a new drum unit. (2) Check the paper used m eets the recomm ended paper specifications. (3) Clean the printer interior and the corona wire in the drum unit. Possible cause Step Check Result Remedy Gr ound contacts Scratch on the drum [...]

Confiden tial 9-35 I- 9 White vertical streak s User Check (1) Try to wipe the scanner window with a soft cloth. (2) The toner cartridge m ay be damag ed. Install a new toner cartridge. (3) Check the printer’s env ironment. High tem perature and high hum idity conditions can cause this problem. (4) Damp (wet) paper might be used. Try to chang e t[...]

Confiden tial 9-36 I- 11 Faulty registration Possible cause Step Check Result Rem edy Excessive paper load 1 Is the paper loaded in the paper tray m ore than 27mm high? Yes I nstruct the user to keep paper loads below 27mm in depth. 2 Is the specified weight of the recomm ended paper being used? No Recomm end to use the specified types of paper. Pr[...]

Confiden tial 9-37 I- 12 Poor fixing Possible cause Step Check Result Remedy Print paper 1 Is thick paper of more than 43lb being used? Yes Recom mend to use the specified types of paper. Toner sensor failure (When printing is faint.) 2 Is the problem solved by replacing the drum unit or the toner cartridge? Yes 1) Toner is empty . 2) The toner sen[...]

Confiden tial 9-38 I- 13 Im age distortion Possible cause Step Check Result Remedy Laser unit installation 1 Is the laser unit secured to the frame incorrectly ? (Check if there is any play.) No Secure the unit correctly and tighten the screws. Scanner LD emission failure Scanner m otor rotation failure 2 Is the laser diode or the scanner mo tor de[...]

Confiden tial 9-39 I- 15 White spots User Check (1) I f the problem is not solv ed after printing a few pages, the drum unit may have g l ue from label stock on the exposure drum surface. Refer to Step 1 in the table below and NOTE in the next page. (2) The drum unit m ay be damag ed. Install a new drum unit. Possible cause Step Check Result Remedy[...]

Confiden tial 9-40 NOTE: Clean the drum unit as follows. (1) Rem ove the toner cartridge from the drum unit. Place the printing sam ples in front of the drum unit, and find the exact position of the im age defect. (2) Turn the drum g ear by hand while looking at the surface of the exposure drum. (3) Wipe the surface of the exposure drum w ith a cot[...]

Confiden tial 9-41 I- 16 Black spots User Check (1) I f the problem is not solv ed after printing a few pages, the drum unit may have g lue from label stock on the exposure drum surface. Refer to Step 1 in the table below and NOTE in the next page. (2) The drum unit m ay be damag ed. Install a new drum unit. Possible cause Step Check Result Remedy [...]

Confiden tial 9-42 I- 17 Black band Possible cause Step Check Resu lt Remedy Gro und contacts Corona failure 1 Is the w ire cleaner at its home position? No Return the wire cleaner to its home position. (2) Corona dirty 2 Is the corona wire dirty? Yes 1) Clean the corona wire. 2) If the problem still appears after cleaning, replace the drum unit. ([...]

Confiden tial 9-43 I- 18 Gray back ground Possible cause Step Check Result Remedy No Recom mend to use the specified types of paper. Print paper 1 Does the paper being used meet the paper specification (weigh t, etc.) Yes Recom mend to change to freshly unpacked paper. Toner sensor failure (printer side) 2 Is the error indication displayed when the[...]

Confidential 9-44 I-19 Hollow print User Check (1) Check the paper used meets th e recom mended 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 hum idity may cause this situation to occur. Possible cau[...]

Confiden tial 9-45 I- 21 Horizontal lines Possible cause Step Check Resu lt Remedy Paper tray contacts 1 Are the ground contacts on the right side of the paper tray connecting correctly? No Clean the contacts. Drum unit 2 Are the high-v oltage power supply and drum unit contacted correctly? No Clean the contacts. I- 22 Lig ht rain Possible cause St[...]

Confiden tial 9-46 I- 23 Ghost User Check (1) Check the paper used m eets the recomm ended paper specifications. Dam p paper, thick media or roug h surfaced paper can cause the problem. (2) Check the printer’s env ironment. High tem perature and high hum idity conditions can cause the problem. (3) Check that the appropriate media type is selected[...]

Confiden tial 9-47     Location of Grounding Contac ts • Drum unit • Printer body & paper tray (2) Wire cleaner To ner c artr idge (4) Developer roller (1) Exposu re drum (6) Transfer roller (5) Grid (7) Cleaner (3) Charg e Drum Unit (4) Developer roller (3) Charg e (5) Grid (7) Cleaner (1) Exposu re drum (6) Transfer roller[...]

Confiden tial 9-48 [ 5 ] Incorrect prin tout 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. P-1 The printer prints unexpectedly or it prints garbag e. User Check (1) Check if the printer cable is not too long. I t is recomm ended to use a parallel cable of less th[...]

Confiden tial 9-49 P-3 Unable to print full pages of a docum ent with the “MEMORY FULL” messag e. User Check (1) Press the Start key on the control panel to print the data remaining in the printer. (2) Reduce the complexity of y our document or reduce the printer resolution. NOTE: T his problem m ay appear if the data is too com plex . Possible[...]

Confiden tial 9-50 [ 6 ] Netw ork proble m If the error related to netw ork occurs, refer to the following sections;     Installation problem The Brother print serv er is not found during set up o f the netwo rk print software inst a llation or f ro m the printer driver of the Brother printer in Windows ® . The Brother print serv er is[...]

Confiden tial 9-51 (5) Make the following selection. Mak e sure that your print server appears. I f it is visible, then the connection is good. Otherwise, g o to Step 5. 5. If you hav e tried 1 to 4 above and it does not work, then reset the print server back to the default factory setting s and try from the initial setup ag ain. For information ho[...]

Confiden tial 9-52 For Macintosh ® For Mac OS ® 9.1 to 9.2 (1) From the Appl e menu, open the Chooser . (2) Click the Brother Laser (IP) icon, and make sure that y our print server name appears in the right fram e. If it is visible, then the connection is g ood. Otherwise, go to Step (4). For Mac OS ® X 10.2.4 or greater (1) From the Go menu, se[...]

Confiden tial 9-53 <Window s ® 95/98/Me and Windows NT ® 4.0 Peer-to-P eer print (NetBIOS) troubleshooting> If y ou are having trouble printing on a Windows ® 95/98/Me, Windows NT ® 4.0 or later Peer-to- Peer network (N etBIOS), check the following: 1. Make sure that the Brother NetBI OS Port driver is correctly installed and config ured [...]

Confiden tial 9-54 [ 7 ] T roubleshooting of the contr ol panel L-1 Nothing is display ed on the LCD. User Check (1) Verify if the power switch is turned off. Possible cause Step Check Result Remedy Connection between m ain PCB and control panel PCB 1 Main PCB and control panel PCB are properly connected No Fix the connector properly. Harness betwe[...]

Confiden tial 9-55 L-2 The control panel does not work . User Check (1) No Possible cause Step Check Result Remedy Ke y st ic ki ng 1 Any ke y on c on tr ol panel is stuck. Yes Clean up the panel cover, or remov e the burrs from panel cover and panel k eys. Connection between m ain PCB and control panel PCB 2 Main PCB and control panel PCB are prop[...]

Confiden tial 9-56 [ 8 ] T roubleshooting of fax functions F-1 FAX can't send it. User Check (1) Verify that the telephone cord is securely inserted. Possible cause Step Ch eck Result Remedy Dialing m ode setting 1 Dialing sig nal (PB or DP) comes out normally in each mode. (Use telephone line emulator.) Yes Check the dialing m ode setting at [...]

Confiden tial 9-57 F-2 Speed dialing and One-touch dialing can' t be used. Possible cause Step Ch eck Result Remedy Speed dialing, One-touch dialing 1 A fax transmission can be made using the key, ten? Yes Replace the main PCB . Dialing m ode setting 2 Dialing signal (PB or DP) comes out norm ally in each mode. (Use telephone line emulator.) Y[...]

Confident ial 9-58 F-3 FAX can't be received. User Check (1) Verify that the telephone cord is securely inserted. Possible cause Step Ch eck Result Rem edy Receive m ode setting 1 Receive m ode is set to automatic receiv e mode. No Set the receive mode to automatic receiv e mode. NCU PCB 2 Replacement of NC U PCB solves the problem . Yes Repla[...]

Confiden tial 9-59 F-5 Speak er is silent during on-hook dialing. Possible cause Step Check Result Rem edy Connection between m ain PCB and speaker 1 Main PCB and speaker are properly connected. No Fix the connection properly. Speaker 2 Replacem ent of speaker solves the problem . Yes Replace the speaker w ith a normal part. Connection between m ai[...]

Confident ial MFC7420/7820N DCP7010/7020/7025 APPENDIX 1. SERIAL NUMBERING SYSTEM This appendix shows the location of serial number labels put on som e parts and lists the coding information pertaining to the serial numbers.[...]

App. 1-1 Confidential SERIAL NUMBERING SYSTEM Individual machines have a serial number label for the m achine itself and a property label for the head/carriage unit. This section lists the coding information fo r those serial numbers and property codes. (1) Serial number label for the machine itself Location Serial number (6-digit) Product item cod[...]

App. 1- 2 Co nfidential (2) Laser unit serial label REGARDING X delay and Y dela y It indicates required delay amount for writing in each of m ain (X) and sub (Y) scanning direction Location LSU MODEL DISTINCTION ERAME MA NUFACTURER AND MOLD DISTINCTION T1 THE 1st . MOL D Y3 THE 3rd. MOLD POLYGON MOTOR DIST INCTION INSPECTION MACHINE SERIAL NUMBER [...]

Confiden tial MFC7420/7820N DCP7010/7020/7025 APPENDIX 2. FIRMWARE INSTALLATION This appendix provides instructions on how to update firm ware stored in the flash ROM on the main PCB or load firm ware to a new main PCB from the host PC. No hardware replacem ent is required for updating. A 2.1 INSTA LLING T HE UPDA T E DA T A T O T HE MACHINE ......[...]

App. 2-1 Conf idential A2.1 INSTALLING THE UPDATE DATA TO THE MACHINE If y ou want to update the current program stored in the flash ROM of the m ain PCB to the newer version or after y ou replace the main PCB, install the update program onto the flash ROM. The program installation requires a PC/AT -com patible computer (which is capable of running[...]

App. 2-2 Conf idential Installing the Up date Data onto the Flash ROM of the Machine  On a PC running Window s 95 (1) Copy the update data and transfer utility onto the desired sam e directory of the hard disk. e.g., C:UPDATE (2) Click the Start button, point to Program s, and then click MS- DOS Prompt to open an MS- DOS window. (3) Type the dr[...]

App. 2-3 Conf idential  If you use USB cable Preparation You need to have the BHL2- Maintenance Printer driver and FILEDG32.exe (prov ided by Brother Industries) on hand. Sav e them in an arbitrary folder in y our PC. Installing the BHL2 -Maintenance Printer driver To identify term inals connected via USB interface, a PC requires the correspondi[...]

App. 2-4 Conf idential (6) The following screen appears, indicating the detection of new hardware dev i ce by the sy stem. Click Ne xt to proceed. (7) Select "Search for a suitable driver for my device (recomm ended)" and click Next . (8) Select "Specify a location" and click Next .[...]

App. 2-5 Conf idential (9) Select the folder where the copy of the BH L2-Maintenance Printer driver is located (or click Browse to specify it), then click OK . (This sample screen is captured on the Windows 2000 desk top.) (10) Click Next . (11) To proceed, click Yes .[...]

App. 2-6 Conf idential (12) If the driver is successfully installed, the following messag e window appears. Click Finish to return to Windows. NOTE: After completion of the driver installation, if the m achine exits the maintenance m ode, the "Found New Hardware Wizard" screen in step (6) appears again. Click Cancel . NOTE: T o check that[...]

App. 2-7 Conf idential Writing the update program s/data onto the f lash ROM of the machine After the installation procedure of the printer driver, proceed to the firm ware writing operation. If the printer driver has been installed so that you start from writing firm ware, unplug the power cord from the electrical outlet. MFC7820N/7420 While holdi[...]

App. 2-8 Confidential (3) MFC7420/7820N 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 key s. Next press the key four times to make the machine enter the maintenance mode. Press the key several times to display 8 on the LCD and then press th[...]

App. 2-9 Conf idential A2.2 SETTING ID CODES TO MACHINES Brother driv er machines are assigned unique ID codes (character string s) at the factory. I f you replace the main P CB of the machine, the m achine will lose its assigned I D code so that it will not be identified by the connected PC*. You need to assign a unique ID code (character string) [...]

Confident ial MFC7420/7820N DCP7010/7020/7025 APPENDIX 3. CUSTOMIZING CODES ACCORDING TO SHIPPING DESTINATION This appendix lists the customiz ing codes for the various preferences exclusively designed for each destination (e.g. lang uage). Those codes are stored in the memory (EEPROM) mounted on the main P CB. If the m ain PCB is replaced with a n[...]

App. 3-1 Confidential EEPROM CUSTOMIZING CODES This function allows you to customize the EEPR OM according to language, function settings, and firmware switch settings.  Operating Procedure (1) Press the Menu/Set (Menu) and Start keys. Next press the key four times to make the machine enter the maintenance mode. TIP: FAX models equipped with num[...]

Confident ial MFC7420/7820N DCP7010/7020/7025 APPENDIX 4. FIRMWARE SWITCHES (WSW) This appendix describes the functions of the firmware switches, which can be div i ded into two groups: one is for custom izing preferences design ed for the shipping destination (as described in Appendix 3 ) and the other is for modify ing preferences that match the [...]

App. 4- 1 Con fidential 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. 4- 9 WSW07 Dial tone setting 1 App.[...]

App. 4- 2 Con fidential 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 lig ht source App. 4-46 WSW42 Internet m ail settings App. 4- 47 WSW43 Function setting 21 App. 4- 47 WSW44 Speeding up scanning- 1 App. 4-48 WSW[...]

App. 4- 3 Con fidential WSW01 (Dial pulse setting) Selector No. Function Setting and Sp ecifications 1 2 Dial pulse generation m ode No. 1 2 0 0 : N 0 1 : N+1 1 0 : 10-N 1 1 : N 3 4 Break tim e length in pulse dialing No. 3 4 0 0 : 60 ms 0 1 : 67 ms 1 0 : 40 ms (for 16 PPS) 1 1 : 64 ms (at 106- ms intervals) 5 6 In ter-digit pause No. 5 6 0 0 : 800[...]

App. 4- 4 Con fidential  Selector 7: Sw itching betw een 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 s[...]

App. 4- 5 Con fidential WSW03 (PABX* mode setting) Selector No. Function Setting and Specifications 1 CNG detection wh en sharing a modular wall sock et with a telephone 0: A 1: B 2 | 4 Detection tim e length of PABX* dial tone, required for starting dialing (Not used.) No. 2 3 4 0 0 0 : 50 ms 0 0 1 : 210 ms 0 1 0 : 500 ms 0 1 1 : 800 ms 1 0 0 : 90[...]

App. 4- 6 Con fidential  Selectors 6 and 7: Dial tone detection in PA BX (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" activ ates the dial tone detection function so that the machine starts dialin[...]

App. 4- 7 Con fidential  Selector 4: Dual tone detection sensitivity in ICM recording Setting this selector to "1" increases the tone detection sensitiv ity in IC M 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 [...]

App. 4- 8 Con fidential     Selectors 1 through 3: 1st dial tone detection These selectors activate or deactivate the 1st dial tone detection function w hich detects the 1st dial tone issued from the PSTN w hen a line is connected to the PST N. Setting all of these selectors to "1" activ ates the dial tone detection function s[...]

App. 4- 9 Con fidential WSW06 (Redial/Pause key setting and 2nd dial tone detection) Selector No. Function Setting and Sp ecifications 1 | 3 Redial/Pause k ey setting and 2nd dial tone detection 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. WAIT 1 0 0 : 14 sec. WAIT 1 1 0 : 2nd dial tone detection only in pu[...]

App. 4-10 Conf idential  Selectors 1 through 3: Redial/Pause key setting and 2nd dial tone detection Selectors 1 2 3 0 0 0 No WAIT is inserted even if the Red ial/Pause key is pressed. 0 0 1 0 1 0 0 1 1 1 0 0 If y ou press the Redial/Pause key during dialing, the m achine will insert WAIT as defined in the abov e table. If t h e Redial/Pause key[...]

App. 4-11 Conf idential WSW07 (Dial tone setting 1) Selector No. Function Setting and Specifications 1 2 Dial tone frequency band control No. 1 2 0 0 : Narrows by 10 Hz 0 1 : Initial v alue 1 X : Widens by 10 Hz 3 Line current detection (Not used.) 0: No 1: Yes 4 | 6 2nd dial tone detection level (Z = 600 Ω ) No. 4 5 6 0 0 0 : -21 dBm 0 0 1 : -24[...]

App. 4-12 Conf idential WSW08 (Dial tone setting 2) Selector No. Function Setting and Specifications 1 | 3 1st dial tone detection time length No. 1 2 3 0 0 0 : 50 m s 0 0 1 : 210 ms 0 1 0 : 500 ms 0 1 1 : 800 ms 1 0 0 : 900 ms 1 0 1 : 1.5 sec. 1 1 0 : 2.0 sec. 1 1 1 : 2.5 sec. 4 5 Time-out leng th for 1st and 2nd dial tone detection No. 4 5 0 0 : [...]

App. 4-13 Conf idential WSW09 (Protocol definition 1) Selector No. Function Setting and Specifications 1 Frame length selection 0: 256 octets 1: 64 octets 2 Use of non-standard comm ands 0: Allowed 1: Prohibited 3 4 No. of retries No. 3 4 0 0 : 4 times 0 1 : 3 times 1 0 : 2 times 1 1 : 1 time 5 T5 timer 0: 300 sec. 1: 60 sec. 6 T1 timer 0: 35 sec. [...]

App. 4-14 Conf idential WSW10 (Protocol definition 2) Selector No. Function Setting and Specifications 1 Not used. 2 Time length from transmission of the last dial digit to CML ON 0: 100 ms 1: 50 ms 3 Time length from CML ON to CNG transm ission 0: 2 sec. 1: 4 sec. 4 Time leng th from CML O N to CED transm ission (except for facsimile- to-telephone[...]

App. 4-15 Conf idential WSW11 (Busy tone setting) Selector No. Function Setting and Specifications 1 2 Busy tone frequency band control No. 1 2 0 0 : Narrows by 10 Hz 0 1 : Initial value 1 x : Widens by 10 Hz 3 1: 250-750/250- 750 ms 4 1: 400-600/400- 600 ms 5 1: 175-440/175- 440 ms 6 1: 100-1000 m s/17-660 m s 7 1: 110-410/320- 550 ms 8 ON/OFF tim[...]

App. 4-16 Confidential WSW12 (Signal detection c ondition setting) Selector No. Function Setting and Specifications 1 2 Min. detection period required for interpreting incoming calling signal (CI) as OFF No. 1 2 0 0 : 1500 ms 0 1 : 500 ms 1 0 : 700 ms 1 1 : 900 ms 3 4 Max. detection period for incoming calling signal (CI) being OFF No. 3 4 0 0 : 6 [...]

App. 4-17 Conf idential WSW13 (Modem setting) Selector No. Function Setting and Specifications 1 2 Cable equalizer No. 1 2 0 0 : 0 km 0 1 : 1.8 km 1 0 : 3.6 km 1 1 : 5.6 km 3 4 Reception level No. 3 4 0 0 : -43 dBm 0 1 : -47 dBm 1 0 : -49 dBm 1 1 : -51 dBm 5 | 8 Modem attenuator 0: 0 dB 1: 8 dB 0: 0 dB 1: 4 dB 0: 0 dB 1: 2 dB 0: 0 dB 1: 1 dB The mo[...]

App. 4-18 Conf idential WSW14 (AUTO A NS facility setting) Selector No. Function Setting and Sp ecifications 1 2 Frequency band selection (lower limit) for incom ing calling sig nal (CI ) No. 1 2 0 0 : 13 Hz 0 1 : 15 Hz 1 0 : 23 Hz 1 1 : 20 Hz 3 4 Frequency band selection (upper limit) for incom ing calling sig nal (CI ) No. 3 4 0 0 : 30 Hz 0 1 : 5[...]

App. 4-19 Conf idential WSW15 (REDIAL facility setting) Selector No. Function Setting and Specifications 1 2 Redial interval No. 1 2 0 0 : 5 minutes 0 1 : 1 minute 1 0 : 2 minutes 1 1 : 3 minutes 3 | 6 No. of redialings No. 3 4 5 6 0 0 0 0 : 16 times 0 0 0 1 : 1 times 0 0 1 0 : 2 times 0 0 1 1 : 3 times | | 1 1 1 1 : 15 times 7 Not used. 8 CRP opti[...]

App. 4-20 Conf idential WSW16 (Function setting 1) Selector No. Function Setting and Specifications 1 Not used. 2 ITU- T (CCITT) superfine recomm endation 0: OFF 1: ON 3 | 6 Not used. 7 Max. document leng th limitation 0: 400 cm 1: 90 cm 8 Stop/Exit key pressed during reception 0: Not functional 1: Functional NOTE: Selector 7 is applicable to model[...]

App. 4-21 Conf idential WSW17 (Function setting 2 ) Selector No. Function Setting and Sp ecifications 1 2 Off- hook alarm No. 1 2 0 0 : No alarm 0 1 : Always v a lid 1 X : Valid except when 'call reserv ation' is selected. 3 4 Not used. 5 Calendar clock ty pe 0: U.S.A. type 1: European type 6 Not used. 7 Non- ring reception 0: OFF 1: ON 8[...]

App. 4-22 Conf idential WSW18 (Function setting 3) Selector No. Function Setting and Sp ecifications 1 Not used. 2 3 Detection enabled tim e for CNG and no tone No. 2 3 0 0 : 40 sec. 0 1 : 0 sec. (No detection) 1 0 : 5 sec. 1 1 : 80 sec. 4 5 Not used. 6 Reg i stration of station I D 0: Perm itted 1: Prohibited 7 8 Tone sound monitoring No. 7 8 0 X [...]

App. 4-23 Conf idential WSW19 (Transmission speed setting) Selector No. Function Setting and Specifications 1 | 3 First transmission speed choice for fallback No. 1 2 3 No. 4 5 6 0 0 0 : 2,400 bps 0 0 1 : 4,800 bps 0 1 0 : 7,200 bps 4 | 6 Last transmission speed choice for fallback 0 1 1 : 9,600 bps 1 0 0 : 12,000 bps 1 0 1 : 1 1 0 : 14,400 bps 1 1[...]

App. 4-24 Confidential WSW20 (Overseas communications mode setting) Selector No. Function Setting and Specifications 1 EP* tone prefix 0: OFF 1: ON 2 Overseas comm unications mode (Reception) 0: 2100 Hz 1: 1100 Hz 3 Overseas comm unications mode (Transmission) 0: OFF 1: Ignores DIS once. 4 5 Min. time length from reception of CFR to start of transm[...]

App. 4-25 Conf idential  Selectors 8: Limitation on CNG detection If this selector is set to "1," the m achine detects a CNG sig nal according to the condition preset by selectors 2 and 3 on WSW18 after a line is connected. If it is set to "0," the m achine detects a CNG sig nal as long as the line is connected. WSW21 (TAD se[...]

App. 4-26 Conf idential WSW22 (ECM and call w a iting caller ID) Selector No. Function Setting and Specifications 1 ECM* in sending 0: ON 1: OFF 2 ECM* in receiving 0: ON 1: OFF 3 Call Waiting Caller I D 0: ON 1: OFF 4 Not used. 5 | 8 Acceptable TCF bit error rate (%) (Only at 4800 bps) (Not used.) 0: 0% 1: 8% 0: 0% 1: 4% 0: 0% 1: 2% 0: 0% 1: 1% * [...]

App. 4-27 Conf idential WSW23 (Communications setting) Selector No. Function Setting and Specifications 1 Starting point of training check (TCF) 0: From the head of a series of z eros 1: From any arbitrary point 2 3 Allowable training error rate No. 2 3 0 0 : 0% 0 1 : 0.5% 1 0 : 1% 1 1 : 2% 4 5 Decoding error rate for transmission of RTN No. 4 5 0 [...]

App. 4-28 Conf idential WSW24 (TAD setting 2) Selector No. Function Setting and Specifications 1 2 M a xi mu m OGM r e co r di n g time No. 1 2 0 0 : 15 sec. 0 1 : 20 sec. 1 0 : 30 sec. 1 1 : 50 sec. 3 4 Time leng th from CML O N to start of pseudo ring backtone transm ission No. 3 4 0 0 : 4 sec. 0 1 : 3 sec. 1 0 : 2 sec. 1 1 : 1 sec. 5 | 8 Attenua[...]

App. 4-29 Conf idential WSW25 (TAD setting 3) Selector No. Function Setting and Specifications 1 | 4 Not used. 5 | 7 Pause between paging num ber and PIN No. 5 6 7 0 0 0 : 2 sec. 0 0 1 : 4 sec. 0 1 0 : 6 sec. 0 1 1 : 8 sec. 1 0 0 : 10 sec. 1 0 1 : 12 sec. 1 1 0 : 14 sec. 1 1 1 : 16 sec. 8 Not used. NOTE: Selectors 5 through 7 are applicable to the [...]

App. 4-30 Conf idential WSW26 (Function setting 4) Selector No. Function Setting and Specifications 1 2 Not used. 3 Dialing during document reading into the tem porary memo r y i n i n -me mor y me s sa ge transmission 0: Disable 1: Enable 4 5 No. of CNG cycles to be detected (when the line is connected via the external telephone except in the exte[...]

App. 4-31 Conf idential WSW27 (Function setting 5) Selector No. Function Setting and S pecifications 1 Not used. 2 Ringer OFF setting 0: Yes 1: No 3 Automatic play back of OGM when switched to the TAD mode 0: No 1: Yes 4 5 Detection of distinctive ring ing pattern (Not used.) 0: Yes 1: No 6 Recording quality 0: Normal 1: High 7 Recording tim e for [...]

App. 4-32 Conf idential WSW28 (Function setting 6) Selector No. Function Setting and Specifications 1 | 3 Transmission level of DTMF high- band frequency signal No. 1 2 3 0 0 0 : 0 dB 0 0 1 : +1 dB 0 1 0 : +2 dB 0 1 1 : +3 dB 1 0 0 : 0 dB 1 0 1 : -1 dB 1 1 0 : -2 dB 1 1 1 : -3 dB 4 | 6 Transmission lev el of DTMF low-band frequency signal No. 4 5 6[...]

App. 4-33 Conf idential WSW29 (Function setting 7) Selector No. Function Setting and Specifications 1 | 3 Compression threshold lev el for voice sig nals inputted via the telephone line in the built- in TAD operation No. 1 2 3 0 0 0 : -47.0 dBm (A) 0 0 1 : -48.5 dBm (B) 0 1 0 : -50.0 dBm (C) 0 1 1 : -51.5 dBm (D) 1 0 0 : -53.0 dBm (E) 1 0 1 : -54.5[...]

App. 4-34 Conf idential WSW30 (Function setting 8) Selector No. Function Setting and Specifications 1 | 3 Dial tone/busy tone detection level during recording of ICM (Not used.) 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) 0 1 1 : -42.5 dBm (D) 1 0 0 : -44.0 dBm (E) 1 0 1 : -45.5 dBm (F) 1 1 0 : -47.0 dBm (G) 1 1 1 : [...]

App. 4-35 Conf idential WSW31 (Function setting 9) Selector No. Function Setting and Specifications 1 Not used. 2 Default reduction rate for failure of automatic reduction during recording 0: 100% 1: 70% 3 Not used. 4 (Do not disturb this selector.) 5 Minimum ON and OFF duration of ringer sig nals effective in distinctiv e ringing 0: 130 m s 1: 90 [...]

App. 4-36 Conf idential WSW32 (Function setting 10) Selector No. Function Setting and Specifications 1 | 4 Not used. 5 6 Default resolution No. 5 6 0 0 : Standard 0 1 : Fine 1 0 : Super fine 1 1 : Photo 7 8 Default contrast No. 7 8 0 X : Autom atic 1 0 : Super light 1 1 : Super dark  Selectors 5 and 6: Default resolution These selectors set the [...]

App. 4-37 Conf idential WSW33 (Function setting 11) Selector No. Function Setting and Specifications 1 | 3 Detection threshold level of "no tone" during recording of ICM 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) 0 1 1 : - 47.0 dBm (D) 1 0 0 : - 48.5 dBm (E) 1 0 1 : - 50.0 dBm (F) 1 1 0 : - 51.5 dBm (G)[...]

App. 4-38 Conf idential WSW34 (Function setting 12) Selector No. Function Setting and Specifications 1 | 3 Erasing tim e length of IC M tone recorded preceding the tone detection starting point in the case of automatic line disconnection due to no voice signal receiv ed No. 1 2 3 0 0 0 : 0 sec. 0 0 1 : 1 sec. 0 1 0 : 2 sec. 0 1 1 : 3 sec. 1 0 0 : 4[...]

App. 4-39 Conf idential WSW35 (Function setting 13) Selector No. Function Setting and Specifications 1 | 4 Max. detection period of dial tone/busy tone during recording of ICM No. 1 2 3 4 0 0 0 0 : No detection 0 0 0 1 : 1 sec. 0 0 1 0 : 2 sec. 0 1 0 0 : 4 sec. | | 1 1 1 1 : 15 sec. 5 | 8 Not used. NOTE: Selectors 1 through 4 are applicable to mode[...]

App. 4-40 Conf idential WSW36 (Function setting 14) Selector No. Function Setting and Specifications 1 ECP mode* (Not used.) 0: ON 1: OFF 2 Recovery from Inactiv e PC In terface (Not used.) 0: Disable 1: Enable 3 PC Power-off Recog nition Tim e (Not used.) 0: Norm al 1: Long 4 Not used. 5 Escape from phase C 0: Yes 1: No 6 | 8 Extension of incom i [...]

App. 4-41 Conf idential  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 m achine detects the frequency of a CI sig nal specified by selectors 1 through 4 on WSW14, it starts the ring er sounding. However, the machine m ay fail to detect[...]

App. 4-42 Conf idential WSW38 (V.34 transmission settings) Selector No. Function Setting and Specifications 1 2 Setting of the equalizer No. 1 2 0 X : Automatic 1 0 : Fixed to 4 points 1 1 : Fixed to 16 points 3 Sending level of g uard tone at phase 2 0: Normal - 7 db 1: Normal 4 Stepping down the transmission speed at fallback each 0: 2400 bps 1: [...]

App. 4-43 Conf idential WSW39 (V.34 transmission speed) Selector No. Function Setting and Specifications 1 | 4 First transmission speed choice for fallback No. 1 2 3 4 No. 5 6 7 8 0 0 0 0 : 2400 bps 0 0 0 1 : 4800 bps 0 0 1 0 : 7200 bps 0 0 1 1 : 9600 bps 0 1 0 0 : 12000 bps 0 1 0 1 : 14400 bps 0 1 1 0 : 16800 bps 0 1 1 1 : 19200 bps 5 | 8 Last tra[...]

App. 4-44 Conf idential WSW40 (V.34 modem settings) Selector No. Function Setting and Specifications 1 2 Not used. 3 | 8 Masking of sy mbol rate(s) Not masking Masking No. 3 0 1 3429 sy mbols/s ec No. 4 0 1 3200 sy mbols/s ec No. 5 0 1 3000 sy mbols/s ec No. 6 0 1 2800 sy mbols/s ec No. 7 - - Not used . No. 8 0 1 2400 sy mbols/s ec NOTE: WSW40 take[...]

App. 4-45 Conf idential Sym b o l rate T ransmission speed (bps) Sym b ol rate T ransmission speed (bps) Sym b ol rate Tr ansmission speed (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 24000 24000 2800 4800 26400 28800 7200 28800 31200[...]

App. 4-46 Conf idential WSW41 (ON-dura tion of the scanning light source) Selector No. Function Setting and Specifications 1 | 3 ON-duration of the scanning light source at room temp erature (Not used.) No. 1 2 3 0 0 0 : 16 hours 0 0 1 : 24 hours 0 1 0 : 12 hours 0 1 1 : 8 hours 1 0 0 : 4 hours 1 0 1 : 2 hours 1 1 0 : 10 minutes 1 1 1 : 0 minute 4 [...]

App. 4-47 Conf idential WSW42 (Inte rnet mail settings) Selector No. Function Setting and Specifications 1 Access to the incoming mail (POP3) server (Periodical or on-dem and) 0: Disable 1: Enable 2 Access to the outgoing mail (SMTP) server 0: Disable 1: Enable 3 I- FAX relay 0: Disable 1: Enable 4 | 8 Not used. NOTE: WSW42 is applicable to models [...]

App. 4-48 Conf idential WSW44 ( Speeding up scanning-1) Selector No. Function Setting and Specifications 1 | 5 Not used. 6 | 8 Effective tim e length of the white leve l compensation data obtained beforehand (Not used.) No. 6 7 8 0 0 0 : Obtained compensation data ineffective 0 0 1 : 1 min. 0 1 0 : 3 min. 0 1 1 : 5 min. 1 0 0 : 10 m in. 1 0 1 : 15 [...]

App. 4-49 Conf idential WSW45 ( Speeding up scanning-2) Selector No. Function Setting and Specifications 1 | 3 Delay time from w hen documents are set until the ADF starts draw ing them in (Not used.) No. 1 2 3 0 0 0 : No autom atic drawing-in 0 0 1 : 1 sec. 0 1 0 : 2 sec. 0 1 1 : 3 sec. 1 0 0 : 4 sec. 1 0 1 : 5 sec. 1 1 0 : 6 sec. 1 1 1 : 7 sec. 4[...]

App. 4-50 Conf idential WSW46 (Monitor of pow er ON/OFF state and parallel port kept at high) Selector No. Function Setting and Specifications 1 2 Monitoring the PC ON/OFF state (Not used.) No. 1 2 0 0 : Disable 0 1 : Monitor SELECT IN 1 0 : Monitor STROBE 1 1 : Monit or both SELECT IN and STROBE 3 Parallel port output pins kept at hi gh l eve l (N[...]

App. 4-51 Conf idential WSW47 (Sw itching betw een high- and full-speed USB) Selector No. Function Setting and Sp ecifications 1 Handling paper at the occurrence of a paper feed timing error 0: Eject paper w/o print 1: Print on the current paper 2 Not used. 3 4 Delay of FAX line disconnection when switching to the pseudo-ring ing external telephone[...]

App. 4-52 Confidential WSW48 (USB setup latency ) Selector No. Function Setting and Specifications 1 | 5 Not used. 6 | 8 USB setup latency No. 6 7 8 0 0 0 : Default period 0 0 1 : Shorter 1 0 1 0 : Longer 1 0 1 1 : Longer 2 1 0 0 : Longer 3 1 0 1 : Longer 4 1 0 0 : Shorter 2 1 1 1 : Shorter 3 z Selectors 6 through 8: USB setup latency These selecto[...]

App. 4-53 Confidential WSW50 (SDA A settings) Selector No. Function Setting and Specifications 1 2 Percentage voltage for interpreting the external telephone as being hooked up (based on the network's standard voltage) (Not used) No. 1 2 0 0 : 80% 0 1 : 90% 1 0 : 70% 1 1 : No detection 3 DC mask curve table to be applied when the line is conne[...]

App. 4-54 Conf idential WSW51 (Function setting 16) Selector No. Function Setting and Specifications 1 Output of communications error report when transmission verification report is disabled 0: Enable 1: Disable 2 | 8 Not used.[...]

Confident ial MFC7420/7820N DCP7010/7020/7025 APPENDIX 5. WIRING DIAGRAM This appendix provides the wiring diag ram that helps you understand the connections between PCBs.[...]

LAN Parallel Interface CN501 CN18 CHRG CN500-12 -7 -10 RDPS -5 -4 -3 -2 -1 SL VCC5 TELOFF CI VCC24 PLS CML S0V CN9-2 -1 VOUT2 VOUT1 J2 LINE J1 EXT RL1 -6 RL2/POL -8 FG R-GND G-GND B-GND CLK VLED TG VREF VCC GND MODE AO CN2-12 -1 1 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 BB -3 -2 -1 CN1 1-4 B AB A USB CN12 RESPONSE COMMAND S0V PCLK +5V -5 -4 -3 -2 -1 CN3-6 V[...]

Confident ial MFC7420/7820N DCP7010/7020/7025 APPENDIX 6. CIRCUIT DIAGRAMS This appendix provides the circuit diagram s 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 m odels) NCU PCB: MFC7420 (EUROPE models) NCU PCB: MFC7820N (EUROPE models) B. Power Supply PCB 100V (U.S.A. [...]

A. NCU PCB: MFC7420 (U.S.A. and CANADA models) Confidential[...]

A. NCU PCB: MFC7820N (U.S.A. and CANADA models) Confidential[...]

A. NCU PCB:MFC7420 (EUROPE models) Confidential[...]

A. NCU PCB: MFC7820N (EUROPE models) Confidential[...]

B. Power Supply PCB 100V (U.S.A. and CANADA models) Confidential[...]

B. Power Supply PCB 200V (EUROPE models) Confidential[...]

December '04 SM-FAX036(2) 8C5A03 Printed in Japan[...]