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Brother FAX 2800 - B/W Laser - Fax Service Manual

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FACSIMILE EQUIPMENT

SERVICE MANUAL

MODEL: FAX2800/MFC4800

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Summary of Contents for Brother FAX 2800 - B/W Laser - Fax

  • Page 1: Service Manual

    FACSIMILE EQUIPMENT SERVICE MANUAL MODEL: FAX2800/MFC4800...
  • Page 2 © Copyright Brother 2001 All rights reserved. No part of this publication may be reproduced in any form or by any means without permission in writing from the publisher. Specifications are subject to change without notice.
  • Page 3 PREFACE This publication is a Service Manual covering the specifications, construction, theory of operation, and maintenance of the Brother facsimile equipment. It includes information required for field troubleshooting and repair--disassembly, reassembly, and lubrication--so that service personnel will be able to understand equipment function, to rapidly repair the equipment and order any necessary spare parts.
  • Page 4 SAFETY INFORMATION Laser Safety (110-120V Model only) This printer is certified as a Class 1 laser product under the US Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for Health and Safety Act of 1968. This means that the printer does not produce hazardous laser radiation. Since radiation emitted inside the printer is completely confined within the protective housings and external covers, the laser beam cannot escape from the machine during any phase of user operation.
  • Page 5 CHAPTER GENERAL DESCRIPTION...
  • Page 6 CHAPTER 1 GENERAL DESCRIPTION CONTENTS EQUIPMENT OUTLINE ....................1-1 1.1.1 External Appearance and Weight ................1-1 1.1.2 Components ......................1-1 SPECIFICATIONS......................1-2...

  • Page 7: Equipment Outline

    1.1 EQUIPMENT OUTLINE 1.1.1 External Appearance and Weight The figure below shows the equipment appearance and approximate dimensions. 243 mm 9.6" 395 mm 15.6" 359 mm (including handset) 14.1" Weight: Machine proper Approx. 7.5 kg Machine (incl. drum unit & toner cartridge) Approx.

  • Page 8: Specifications

    1.2 SPECIFICATIONS FAX2800 (FAX2850)/FAX2900 (1/2) FAX2800 (FAX2850) FAX2900 Model Name GENERAL Print Engine Laser (YL4) Laser (YL4) Modem Speed(bps) 14,400(Fax) 14,400(Fax) Transmission Speed(sec.) 6(Brother#1,MMR) 6(Brother#1,MMR) ITU-T Group Coding Method MH/MR/MMR MH/MR/MMR Input/Output Width 5.8"-8.5"/3.5"-8.5" 5.8"-8.5"/3.5"-8.5" Input/Output Length 5"-14"/5"-14" 5"-14"/5"-14" ADF(pages) up to 20 up to 20 LCD Size...
  • Page 9 FAX2800 (FAX2850)/FAX2900 (2/2) Model Name FAX2800 (FAX2850) FAX2900 PRINTER Color/Mono Mono Engine Type Laser (YL4) Resolution(dpi) 600x600 Speed(ppm) up to 10 Paper Capacity(sheets) Output Paper Capacity(sheets) Standard Print Language Windows GDI Emulation Resident Fonts Fonts Disk Based Paper Handling Size LTR, LGL, A4, B5, A5, EXE Manual Feed Slot Other Paper Type...
  • Page 10 MFC4800/FAX3800 (1/2) Model Name MFC4800 FAX3800 GENERAL Print Engine Laser (YL4) Laser (YL4) Modem Speed(bps) 14,400(Fax) 33,600(Fax) Transmission Speed(sec.) 6(Brother#1,MMR) 2(Brother#1,JBIG) ITU-T Group Supper G3 Coding Method MH/MR/MMR MH/MR/MMR/JBIG Input/Output Width 5.8"-8.5"/3.5"-8.5" 5.8"-8.5"/3.5"-8.5" Input/Output Length 5"-14"/5"-14" 5"-14"/5"-14" ADF(pages) up to 20 up to 20 LCD Size 16 Characters x 1 Line...
  • Page 11 MFC4800/FAX3800 (2/2) Model Name MFC4800 FAX3800 PRINTER Color/Mono Mono Mono Engine Type Laser (YL4) Laser (YL4) Resolution(dpi) 600x600 600x600 Speed(ppm) up to 10 up to 10 Paper Capacity(sheets) Output Paper Capacity(sheets) Standard Print Language Windows GDI Windows GDI Emulation Resident Fonts Fonts Disk Based Paper Handling Size LTR, LGL, A4, B5, A5, EXE...
  • Page 12 FAX-8070P/MFC-9070 (1/2) Model Name FAX-8070P MFC-9070 GENERAL Print Engine Laser (YL4) Laser (YL4) Modem Speed(bps) 14,400(Fax) 14,400(Fax) Transmission Speed(sec.) Approx.6 (Brother#1,MMR) Approx.6(Brother#1,MMR) ITU-T Group Coding Method MH/MR/MMR MH/MR/MMR Input/Output Width 5.8"-8.5"/3.5"-8.5" 5.8"-8.5"/3.5"-8.5" Input/Output Length 5"-14"/5"-14" 5"-14"/5"-14" ADF(pages) up to 20 up to 20 LCD Size 16 Characters x 1 line...
  • Page 13 FAX-8070P/MFC-9070 (2/2) Model Name FAX-8070P MFC-9070 PRINTER Color/Mono Mono Engine Type Laser (YL4) Resolution(dpi) 600x600 Speed(ppm) up to 10 Paper Capacity(sheets) Additional Paper Capacity(sheets) Output Paper Capacity(sheets) Standard Print Language Windows GDI Emulation Yes(PCL5e) Yes(Bitmap font: LetterGothic16.66, OCR-A, OCR-B, Resident Fonts Scaleable font;...
  • Page 14 CHAPTER INSTALLATION...
  • Page 15 CHAPTER 2 INSTALLATION CONTENTS INSTALLING THE UPDATE DATA TO THE FACSIMILE MACHINE......2-1 SETTING ID CODES TO FACSIMILE MACHINES CONNECTED TO A SINGLE PC VIA USB ........................2-3...

  • Page 16: Installing The Update Data To The Facsimile Machine

    2.1 INSTALLING THE UPDATE DATA TO THE FACSIMILE MACHINE If the program version is updated or the main PCB is replaced, then install the update program onto the flash ROM of the main PCB. The program installation requires a PC/AT-compatible computer (which is capable of running MS- DOS or its compatible OS).
  • Page 17 Installing the update data onto the flash ROM of the facsimile machine NOTE: The following is an installation procedure example on a PC that is running Windows 95/98. (1) Copy the update data and transfer utility onto the desired directory of the hard disk. e.g., C:\UPDATE (2) Click the Start button, point to Programs, and then click MS-DOS Prompt to open an MS-DOS window.
  • Page 18 2.2 SETTING ID CODES TO FACSIMILE MACHINES CONNECTED TO A SINGLE PC VIA USB Function Brother facsimile machines are assigned ID codes (character strings) at the factory. If you replace the main PCB of the machine, the machine will lose its assigned ID code so that it will not be identified by the connected PC.

  • Page 19: Theory Of Operation

    CHAPTER THEORY OF OPERATION...

  • Page 20: Table Of Contents

    CHAPTER 3 THEORY OF OPERATION CONTENTS OVERVIEW ........................3-1 MECHANISMS .........................3-2 3.2.1 Scanner Mechanism ....................3-3 3.2.1.1 Document feeding and ejecting mechanism ..........3-3 3.2.1.2 Scanner......................3-3 3.2.2 Laser Printing Mechanism..................3-4 3.2.2.1 Paper pulling-in, registration, feeding, and ejecting mechanism....3-4 3.2.2.2 Print process mechanism................3-6 3.2.2.3 Heat-fixing mechanism ................3-7 3.2.3 Sensors and Actuators ..................3-8...

  • Page 21: Overview

    3.1 OVERVIEW 3 -1...

  • Page 22: Mechanisms

    3.2 MECHANISMS The facsimile machine is classified into the following mechanisms: SCANNER MECHANISM - Document feeding and ejecting mechanism - Document scanning mechanism LASER PRINTING MECHANISM - Paper pulling-in, registration, feeding, and ejecting mechanisms - Print process mechanism (consisting of charging, exposing, developing, transferring, and erasing processes) - Heat-fixing mechanism...
  • Page 23 3.2.1 Scanner Mechanism 3.2.1.1 Document feeding and ejecting mechanism This mechanism consists of the document stacker, automatic document feeder (ADF), document ejection roller ASSY, and document sensors. (For details about the sensors, refer to Subsection 3.2.3.) If you set documents on the document stacker with their faces down and start the scanning operation, then the scanner motor rotates so that the ADF (which consists of the separation roller and ADF parts) feeds those documents into the machine, starting from the bottom sheet (first page) to the top (last page), page by page.

  • Page 24: Laser Printing Mechanism

    3.2.2 Laser Printing Mechanism 3.2.2.1 Paper pulling-in, registration, feeding, and ejecting mechanism 3 -4...
  • Page 25 Paper pulling-in and registration mechanism The paper pulling-in and registration mechanism consists of the pull-in roller gear (incorporated in the auto sheet feeder ASF), planetary gear system, paper feed solenoid, solenoid lever, clutch release lever, and registration sensor. (For the details about the sensor, refer to Subsection 3.2.3.) If the main motor rotates clockwise, the rotation is transmitted to the intermediate gear of the planetary gear system.

  • Page 26: Print Process Mechanism

    3.2.2.2 Print process mechanism The print process unit works with laser beam, electrical charges, and toner. The graph below shows the transition of electrical charge on the surface of the laser-sensitive drum through the five processes: charging, exposing, developing, transferring, and erasing processes. 3 -6...

  • Page 27: Heat-Fixing Mechanism

    3.2.2.3 Heat-fixing mechanism As the paper passes between the heater roller and the pressure roller in the heat-fixing unit, the heater roller fuses the toner on the paper. 3 -7...

  • Page 28: Sensors And Actuators

    3.2.3 Sensors and Actuators This machine has nine sensors: six photosensors, two thermistors and a mechanical switch as described below. Sensor name Type Located on Document front sensor Photosensor Control panel PCB Document rear sensor Photosensor Cover sensor Photosensor Cover/registration sensor PCB Registration sensor Photosensor Paper ejection sensor...
  • Page 29 Location of Sensors and Actuators 3 -9...

  • Page 30: Control Electronics

    3.3 CONTROL ELECTRONICS 3.3.1 Configuration The hardware configuration of the facsimile machine is shown below. Configuration of Facsimile Machine (NOTE 1) Not provided on some models. (NOTE 2) Provided on the European, Pacific, and Asian versions. 3 -1 0...
  • Page 31 CHAPTER DISASSEMBLY/REASSEMBLY AND LUBRICATION...
  • Page 32 CHAPTER 4 DISASSEMBLY/REASSEMBLY AND LUBRICATION CONTENTS DISASSEMBLY/REASSEMBLY..................4-1 Safety Precautions .......................4-1 Tightening Torque List......................4-2 Preparation ........................4-3 How to Access the Object Component ................4-3 Disassembly Order Flow....................4-4 4.1.1 Document Guide Base ..................4-5 4.1.2 Board Access Cover.....................4-5 4.1.3 Auto Sheet Feeder (ASF)..................4-6 4.1.4 Handset Mount and Control Panel ASSY............4-12 4.1.5 Panel Rear Cover and Control Panel ..............4-14...
  • Page 33 4.1.22 PCB Support and NCU PCB ................4-38 4.1.23 Side Covers R and L ..................4-39 4.1.24 Scanner Grounding Plate ...................4-40 4.1.25 EL (Eraser Lamp) Board ..................4-41 4.1.26 Harness Routing....................4-42 4.1.27 Cleaning of High-voltage Contacts and Grounding Contacts......4-46 4.2 LUBRICATION ........................4-47...

  • Page 34: Disassembly/Reassembly

    4.1 DISASSEMBLY/REASSEMBLY Safety Precautions To prevent the creation of secondary problems by mishandling, observe the following precautions during maintenance work. (1) Unplug the power cord from the power outlet before replacing parts or units. When having access to the power supply, be sure to unplug the power cord from the power outlet. (2) When servicing the optical system of the laser printing unit, be careful not to place screwdrivers or other reflective objects in the path of the laser beam.

  • Page 35: Tightening Torque List

    Tightening Torque List Location Screw type Q'ty Tightening torque N•m (kgf•cm) Board access cover Taptite, bind B M4x12 0.98 ±0.20 (10 ±2) Release lever Taptite, bind B M4x10 0.69 ±0.20 (7 ±2) Grounding leaf spring R Taptite, bind B M2.6x8 0.39 ±0.10 (4 ±1) Grounding leaf spring L...

  • Page 36: Preparation

    Preparation Prior to proceeding to the disassembly procedure, (1) Unplug - the modular jack of the telephone line, - the modular jack of the curled cord (and remove the handset), - the PC interface cable (parallel cable or USB cable) if connected (Not shown below), and - the modular jack of an external telephone set if connected (Not shown below).

  • Page 37: Disassembly Order Flow

    Disassembly Order Flow 4 -4...

  • Page 38: Document Guide Base

    4.1.1 Document Guide Base (1) Lift up the document guide base. 4.1.2 Board Access Cover (1) Remove two screws. (2) Push down the top of the board access cover to release the two latches from the main cover, then pull it to the rear. 4 -5...

  • Page 39: Auto Sheet Feeder (Asf)

    4.1.3 Auto Sheet Feeder (ASF) (1) If the board access cover has not been removed in Subsection 4.1.2, you need to remove the two screws with which the board access cover and ASF are fastened together to the main cover. (2) Open the top cover.
  • Page 40 [Disassembling the ASF] 1) Unhook the release lever spring. 2) Remove screw "a" and pull out the release lever. 3) Turn the release cam to the front and pull it out to the left. 4 -7...
  • Page 41 4) At the right end of the ASF, remove the screw from the grounding leaf spring R. (It is not necessary to remove the leaf spring.) Next pull out the pawled bushing R. At the left end of the ASF, remove the sector gear and its spring. Unlatch the pawled bushing L to the left and then remove it from the paper pull-in roller shaft.
  • Page 42 6) Turn the ASF upside down, remove the registration sensor actuator. 4 -9...
  • Page 43 7) There are two sets of pinch roller units. At each set, remove the leaf spring (in the order of shown below), pinch rollers, and pinch roller shaft. 8) At the left end of the paper feed roller, remove two screws and take off the grounding leaf spring L, pawled PF gear, and idle gear.
  • Page 44 10) Press the lock arm provided at the left inside of the ASF to the rear with a screwdriver, slide the ASF chute ASSY to the left, and take it out to the front. NOTE: To replace only the black film attached to the chute, do not remove the ASF chute ASSY from the ASF.

  • Page 45: Handset Mount And Control Panel Assy

    4.1.4 Handset Mount and Control Panel ASSY (1) Open the control panel ASSY. (2) Open the top cover. (3) Unhook the three latches of the handset mount from the top cover and remove it. 4 -1 2...
  • Page 46 (4) Disconnect the panel-hook SW harness from the hook sensor PCB and take it out from the cable guides. (5) Push the right-hand arm of the control panel ASSY inwards with your finger and open the control panel ASSY further. Then lift up the control panel ASSY. Reassembling Notes •...

  • Page 47: Panel Rear Cover And Control Panel

    4.1.5 Panel Rear Cover and Control Panel (1) Place the control panel ASSY upside down. If you do not need to remove the ADF parts, pinch rollers and their related parts, anti-static brush, or document rear sensor actuator, skip to step (6). (2) To remove the ADF parts (spring plates and separation rubber), remove the screw.
  • Page 48 (7) Remove the two screws from the panel rear cover. (8) Unhook the panel rear cover from 10 "X" latches provided on the control panel and take off the panel rear cover. (9) Fully turn the document front sensor actuator to the rear and lift it up. (10) Unhook the control panel PCB from four "Y"...
  • Page 49 (12) As shown below, pull the clamp outwards to release the LCD and take out the LCD while pulling the LCD flat cable gently. NOTE: Do not take out the LCD except when the LCD is defective and requires replacement. Reassembling Notes •...

  • Page 50: Top Cover

    4.1.6 Top Cover (1) Remove the board access cover if installed. (2) Disconnect the CIS harness, hook SW-main harness, and scanner motor harness from the main PCB. (3) Remove the screw that secures the FG wire to the PCB support. (4) Release the hook SW-main harness, scanner motor harness, and FG wire from the two cable guides provided on the main cover.
  • Page 51 Reassembling Notes • Before reinstalling the top cover, route the FG wire, hook SW-main harness, scanner motor harness, and CIS harness on the underside of the top cover as illustrated in Subsection 4.1.26, ”Harness routing C." After installing the top cover, route the FG wire and those three harnesses on the main cover as illustrated in Subsection 4.1.26, "Harness routing D and E."...

  • Page 52: Cis Unit

    4.1.7 CIS Unit (1) Turn the top cover upside down. (2) Remove the three screws from the CIS shield plate. The FG wire and feed roller grounding spring also come off. (3) Disconnect the CIS harness from the CIS unit. (4) Turn the top cover rightside up.

  • Page 53: Hook Switch Pcb

    4.1.8 Hook Switch PCB (1) From the top cover, unhook the hook switch PCB and take it out. (2) Take out the hook SW-main harness from the cable guides provided on the scanner drive unit. Reassembling Notes • Route the hook SW-main harness through the cable guides provided on the scanner drive unit as illustrated in Subsection 4.1.26, "Harness routing B."...

  • Page 54: Document Feed Roller Assy, Scanner Drive Unit, And Document Ejection Roller Assy

    4.1.9 Document Feed Roller ASSY, Scanner Drive Unit, and Document Ejection Roller ASSY (1) At the right end of the document feed roller ASSY, unlock the pawled bushing and pull it to the left. Then remove the document feed roller ASSY together with the pawled bushing. (2) At the right end of the pressure roller shaft, press the latch to the rear and take out the pressure rollers and their shaft.
  • Page 55 (5) Remove the screw from the scanner motor and take off the motor from the scanner drive unit. Reassembling Notes • When securing the scanner motor to the scanner drive unit, face the motor connector up as shown above. • Before putting the scanner drive unit into the top cover, make sure that the stopper of bushing L ("a"...

  • Page 56: Separation Roller And Its Gear

    4.1.10 Separation Roller and its Gear (1) Turn the top cover upside down. Place the top cover with its rear edge facing towards you. (2) Slightly push down the lock arm and move the separation roller gear to the left together with its bushing L ("a"...
  • Page 57 Reassembling Notes • The separation roller and its related parts use three bushings (two bushings L and one bushing S). When fitting those bushings, be careful with the direction of their flanges and stoppers as shown on the previous page. What follows is the installation procedure of the separation roller and its related parts.

  • Page 58: Heat-Fixing Unit, Fu Lamp, And Paper Ejection Sensor Actuator

    4.1.11 Heat-fixing Unit, FU Lamp, and Paper Ejection Sensor Actuator (1) Remove the two screws from the heat-fixing unit. (2) Lift up the heat-fixing unit and disconnect the blue and brown heater wires (of the heater harness) from the heat-fixing unit. Then disconnect the heater thermistor harness from the EL (eraser lamp) board.
  • Page 59 (4) To take out the FU lamp from the heat-fixing unit, remove two screws "a." (5) Fully open the upper cover and remove it. (6) Unlatch the idle gear 16 and remove it. (7) Loosen screw "b." (8) Remove screw "c" and take out the lock plate. (9) Slightly lift up the left end of the heater roller and hold the left end of the FU lamp.

  • Page 60: Laser Unit And Toner Sensor Pcb

    4.1.12 Laser Unit and Toner Sensor PCB (1) Disconnect the polygon motor flat cable, toner sensor harness, and laser diode harness from the main PCB. (2) Remove the three screws from the laser unit. (3) Lift up the laser unit. NOTE: When handling the laser unit, take care not to touch the inside of the unit, glass, or mirror.

  • Page 61: Main Pcb

    4.1.13 Main PCB (1) Disconnect the following harnesses and flat cable from the main PCB: • NCU harness • Low-voltage power harness • Main motor harness • High-voltage power flat cable • Cover/registration sensor & fan harness • Solenoid harness •...
  • Page 62 Setting up the main PCB after replacement 4 -2 9...

  • Page 63: Bottom Plate

    4.1.14 Bottom Plate (1) Turn the machine upside down. (2) Remove the nine screws (four "x" and five "y") from the bottom plate, then lift it up. "x": Taptite, cup S M3x6 "y": Taptite, bind B M4x12 4 -3 0...

  • Page 64: Low-Voltage Power Supply Pcb

    4.1.15 Low-voltage Power Supply PCB (1) Remove screw "a" and take off the low-voltage insulator sheet. (2) Remove screws "b" and "c" from the low-voltage power supply PCB and grounding wire, respectively. (3) Remove screw "d" and lift up the power inlet support. (4) Slightly lift up the low-voltage power supply PCB and disconnect the low-voltage power harness and heater harness (of the blue and brown wires).

  • Page 65: High-Voltage Power Supply Pcb

    4.1.16 High-voltage Power Supply PCB (1) Remove the screw and take off the high-voltage insulator sheet. (2) Slightly lift up the high-voltage power supply PCB and disconnect the high-voltage power flat cable and EL (eraser lamp) harness. Reassembling Notes • Fold the high-voltage power flat cable and route it as illustrated above. •...

  • Page 66: Duct And Fan

    4.1.17 Cover/Registration Sensor PCB, Duct, and Fan (1) Take off the duct by removing the two screws. (2) Unlatch the cover/registration sensor PCB and lift it up and out of the main cover. (3) Disconnect the fan harness from the PCB. (4) Take off the fan support by removing the screw.

  • Page 67: Top Cover Sensor Actuator

    4.1.18 Top Cover Sensor Actuator (1) Pull up the top cover sensor actuator. 4.1.19 Power Supply Shield (1) Remove the two screws and lift up the power supply shield. Reassembling Notes • When reinstalling the power supply shield, route the low-voltage power harness through the opening and route the heater harness through U-shaped cutout "e"...

  • Page 68: Speaker

    4.1.20 Speaker (1) Pull the speaker spring inwards and pull up the speaker together with the spring. Reassembling Notes • Put the speaker into place with its harness facing up. • Route the speaker harness through the latch together with the solenoid harness and main motor harness as shown above.

  • Page 69: Gear Drive Unit

    4.1.21 Gear Drive Unit (1) Make sure that the heat-fixing unit is removed. (2) Take out the heater harness from the cable guides provided on the top of the gear drive unit. (3) Remove the four screws and lift up the gear drive unit. (4) Remove the two screws and take off the main motor.
  • Page 70 (5) To take off the paper feed solenoid, solenoid lever, or clutch release lever, remove the two screws. Reassembling Notes • If the friction spring in the gear drive unit slips off, fit the straight end of the spring in the support hole of the gear drive unit as illustrated above.

  • Page 71: Pcb Support And Ncu Pcb

    4.1.22 PCB Support and NCU PCB (1) Remove the two screws and lift up the PCB support. (2) Remove the two screws and take off the NCU shield. (3) Remove the screw and take off the NCU PCB from the PCB support. (4) Disconnect the NCU harness.

  • Page 72: Side Covers R And L

    4.1.23 Side Covers R and L (1) To take off the side cover R: Remove the two screws, lift up the front end of the side cover R, then pull it to the front. (2) To take off the side cover L: Remove the two screws. While pushing the left side of the scanner grounding plate to the right (in the direction of arrow ), lift up the front end of the side cover L and pull it to the front (arrow...

  • Page 73: Scanner Grounding Plate

    4.1.24 Scanner Grounding Plate (1) Make sure that the heat-fixing unit is removed. (2) Remove the screw from the scanner grounding plate. (If the bottom plate has not been removed, remove screw "y" also (see page 4-30) that secures both the scanner grounding plate and bottom plate.) (3) Slightly lift up the scanner grounding plate and unhook the spring.

  • Page 74: El (Eraser Lamp) Board

    4.1.25 EL (Eraser Lamp) Board Only when you need to replace the EL board (which is attached with double-sided adhesive tape), remove it according to the steps below. (1) Make sure that the EL harness is disconnected from the high-voltage power supply PCB. (Refer to Subsection 4.1.16.) (2) Make sure that the heat-fixing unit is removed.

  • Page 75: Harness Routing

    4.1.26 Harness Routing Harness routing A: Main PCB-related harnesses Harness routing B: Panel-hook SW harness, hook SW-main harness, and scanner motor harness on the main cover 4 -4 2...
  • Page 76 Harness routing C: Hook SW-main harness, scanner motor harness, FG wire, and CIS harness on the underside of the top cover Harness routing D: Hook SW-main harness, scanner motor harness, and FG wire on the top of the main cover 4 -4 3...
  • Page 77 Harness routing E: CIS harness on the top of the main cover Harness routing F: Heater harness on the top of the main cover 4 -4 4...
  • Page 78 Harness routing G: Laser diode harness, polygon motor flat cable, and toner sensor harness on the laser unit Harness routing H: Harnesses viewed from the bottom of the machine 4 -4 5...

  • Page 79: Cleaning Of High-Voltage Contacts And Grounding Contacts

    4.1.27 Cleaning of High-voltage Contacts and Grounding Contacts If any toner particles, paper dust or dirt are on the contacts, clean them out. This will ensure that power flows correctly to enable printing. Grounding contacts High-voltage contacts 4 -4 6...

  • Page 80: Lubrication

    4.2 LUBRICATION Apply the specified lubricants to the lubrication points as shown below. Lubricant amount Lubricant type (Manufacturer) Half of rice-sized pinch Rice-sized pinch Two rice-sized pinches of grease (3 mm of grease (6 mm of grease (12 mm Molykote EM-D110 –––––––...
  • Page 81 [ 2 ] Scanner drive unit [ 3 ] Separation roller 4 -4 8...
  • Page 82 [ 4 ] Document feed roller 4 -4 9...
  • Page 83 CHAPTER MAINTENANCE MODE...
  • Page 84 CHAPTER 5 MAINTENANCE MODE CONTENTS ENTRY INTO THE MAINTENANCE MODE ..............5-1 LIST OF MAINTENANCE-MODE FUNCTIONS ..............5-2 DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS ......5-4 5.3.1 EEPROM Parameter Initialization ................5-4 5.3.2 Printout of Scanning Compensation Data ............5-5 5.3.3 ADF Performance Test ..................5-7 5.3.4 Test Pattern 1.......................5-8 5.3.5 Firmware Switch Setting and Printout ..............5-9...

  • Page 85: Entry Into The Maintenance Mode

    5.1 ENTRY INTO THE MAINTENANCE MODE To make the equipment enter the maintenance mode, press the Menu, *, 2, 8, 6, and 4 keys in this order. Within 2 seconds The equipment beeps for approx. one second and displays " "...

  • Page 86: List Of Maintenance-Mode Functions

    5.2 LIST OF MAINTENANCE-MODE FUNCTIONS Maintenance-mode Functions Reference Function Function Subsection Code (Page) 5.3.1 (5-4) EEPROM Parameter Initialization 5.3.2 (5-5) Printout of Scanning Compensation Data 5.3.3 (5-7) ADF* Performance Test 5.3.4 (5-8) Test Pattern 1 5.3.5 (5-9) Firmware Switch Setting 5.3.5 (5-11) Printout of Firmware Switch Data 5.3.6 (5-12)
  • Page 87 - - - - - - - - - - - - - - - - - - - - - - - - - - IMPORTANT - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Basically, the maintenance-mode functions listed on the previous page should be accessed by service personnel only.

  • Page 88: Detailed Description Of Maintenance-Mode Functions

    5.3 DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS 5.3.1 EEPROM Parameter Initialization Function The equipment initializes the parameters, user switches, and firmware switches registered in the EEPROM, to the initial values. Entering the function code 01 initializes all of the EEPROM areas, but entering 91 does not initialize some areas, as listed below.

  • Page 89: Printout Of Scanning Compensation Data

    5.3.2 Printout of Scanning Compensation Data Function The equipment prints out the white and black level data for scanning compensation. Operating Procedure Do not start this function merely after powering on the equipment but start it after carrying out a sequence of scanning operation.
  • Page 90 Scanning Compensation Data List 5 -6...

  • Page 91: Adf Performance Test

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

  • Page 92: Test Pattern 1

    5.3.4 Test Pattern 1 Function This function, much like the copying function, prints out test pattern 1 to allow the service personnel to check for record data missing or print quality. Operating Procedure Press the 0 and 9 keys in this order in the initial stage of the maintenance mode. The figure below shows test pattern 1.

  • Page 93: Firmware Switch Setting And Printout

    5.3.5 Firmware Switch Setting and Printout [ A ] Firmware switch setting Function The facsimile equipment incorporates the following firmware switch functions which may be activated with the procedures using the control panel keys and buttons. The firmware switches have been set at the factory in conformity to the communications standards and codes of each country.
  • Page 94 Firmware Switches (WSW01 through WSW46) Continued WSW No. Function WSW34 Function setting 12 WSW35 Function setting 13 WSW36 Function setting 14 WSW37 Function setting 15 WSW38 Function setting 16 in V. 34 mode WSW39 Transmission speed setting in V. 34 mode WSW40 Function setting 17 in V.

  • Page 95: Printout Of Firmware Switch Data

    [ B ] Printout of firmware switch data Function The equipment prints out the setting items and contents specified by the firmware switches. Operating Procedure (1) Press the 1 key twice in the initial stage of the maintenance mode. The "PRINTING" will appear on the LCD. (2) The equipment prints out the configuration list as shown in the figure below.

  • Page 96: Operational Check Of Lcd

    5.3.6 Operational Check of LCD Function This function allows you to check whether the LCD on the control panel works normally. Operating Procedure (1) Press the 1 and 2 keys in this order in the initial stage of the maintenance mode. The LCD shows (2) Press the Fax Start key.
  • Page 97 Key & Button Entry Order 5 -1 3...

  • Page 98: Receiver Volume Adjustment (Applicable To The American Version Only)

    5.3.8 Receiver Volume Adjustment (applicable to the American version only) Function The facsimile equipment may switch the handset receiver's volume between three levels--Low, High, and Amplify*. (*Amplify level: Extra-high volume for users who are deaf or hard of hearing.) The volume at Low or Amplify level is fixed and not adjustable. The volume at High level will be influenced by the characteristics of the FET on the main PCB, so it requires fine adjustment according to the procedure given below.

  • Page 99: Sensor Operational Check

    5.3.9 Sensor Operational Check n Function This function allows you to check whether the seven sensors (six sensors on European models)-- document front sensor, document rear sensor, cover sensor, registration sensor, toner sensor, paper ejection sensor, and hook switch*--operate correctly. (*European models have no hook switch.) n Operating Procedure (1) Press the 3 and 2 keys in this order in the initial stage of the maintenance mode.

  • Page 100: Fine Adjustment Of Scanning Start/End Position

    5.3.10 Fine Adjustment of Scanning Start/End Position Function This function allows you to adjust the scanning start/end position. Operating Procedure (1) Press the 5 and 4 keys in this order in the initial stage of the maintenance mode. The "SCAN START ADJ." appears on the LCD. After two seconds, the current scanning position correction value appears.

  • Page 101: Cis Scanner Area Setting

    5.3.11 CIS Scanner Area Setting Function The equipment sets the CIS scanner area and stores it into the EEPROM. Operating Procedure (1) Press the 5 key twice in the initial stage of the maintenance mode. The "SCANNER AREA SET" will appear on the LCD. The equipment checks and sets the area to be scanned.

  • Page 102: Printout Of The Equipment's Log Information

    5.3.13 Printout of the Equipment's Log Information Function The equipment may print out the its log information. Operating Procedure (1) Press the 7 key twice in the initial stage of the maintenance mode. The equipment prints out its log information. (2) Upon completion of printing, the equipment returns to the initial stage of the maintenance mode.

  • Page 103: Equipment Error Code Indication

    5.3.15 Equipment Error Code Indication Function This function displays an error code of the last error on the LCD. Operating Procedure (1) Press the 8 and 2 keys in this order in the initial stage of the maintenance mode. The LCD shows the "MACHINE ERROR X X." (2) To stop this operation and return the equipment to the initial stage of the maintenance mode, press the Stop key.

  • Page 104: Cancellation Of The Memory Security Mode (Applicable To The European Version Only)

    5.3.17 Cancellation of the Memory Security Mode (applicable to the European version only) Function This procedure can cancel the memory security mode. Use this procedure if the user forgets his/her password entered when setting the memory security mode so as not to exit from the memory security mode.
  • Page 105 CHAPTER ERROR INDICATION AND TROUBLESHOOTING...
  • Page 106 CHAPTER 6 ERROR INDICATION AND TROUBLESHOOTING CONTENTS ERROR INDICATION.......................6-1 6.1.1 Equipment Errors ....................6-1 [ 1 ] Error messages on the LCD ................6-1 [ 2 ] Error codes shown in the "MACHINE ERROR X X " message....6-5 6.1.2 Communications Errors..................6-7 TROUBLESHOOTING ....................6-17 6.2.1 Introduction......................6-17 6.2.2...

  • Page 107: Error Indication

    6.1 ERROR INDICATION To help the user or the service personnel promptly locate the cause of a problem (if any), the facsimile equipment incorporates the self-diagnostic functions which display error messages for equipment errors and communications errors. For the communications errors, the equipment also prints out the transmission verification report and the communications list.
  • Page 108 Messages on the LCD Probable Cause n Document loading error CHECK DOCUMENT Remove document, then (1) The document rear sensor detects no leading edge of a press STOP KEY. document within 10 seconds from the start of document loading operation. (These messages appear (The document rear sensor stays OFF even after the alternately.)
  • Page 109 Messages on the LCD Probable Cause COVER OPEN The cover sensor detects that the top cover is not closed. PLS CLOSE COVER (These messages appear alternately.) MACHINE ERROR XX "XX" indicates an error code. Refer to [ 2 ] on pages 6-5 and 6-6.
  • Page 110 Messages on the LCD Probable Cause TONER EMPTY The toner sensor has detected that there is no toner in the cartridge or that no toner cartridge is loaded. If this message Open cover, then replace appears, recording is no longer possible. new toner cartridge.

  • Page 111: 2 ] Error Codes Shown In The "Machine Error X X " Message

    [ 2 ] Error codes shown in the "MACHINE ERROR X X " message Error Code Error factor (Hex.) ( 71 Polygon motor does not synchronize with the reference clock. ) ( 72 Cannot detect Beam Detect signal. ) ( 73 No toner cartridge loaded.
  • Page 112 Error Code Error factor (Hex.) ( B9 Light emission intensity error of the LED array. ) ( D5 The MODEM fails to complete the command transmission sequence. ) ( E4 Out of recording paper. ) Write error in EEPROM. ( E8 Data scanning error during transmission.

  • Page 113: Communications Errors

    6.1.2 Communications Errors If a communications error occurs, the facsimile equipment emits an audible alarm (intermittent beeping) for approximately 4 seconds, displays the corresponding error message, and prints out the transmission verification report if the equipment is in sending operation. 6 -7...
  • Page 114 Definition of Error Codes on the Communications List Calling Code 1 Code 2 Causes Wrong number called. Retrieval file error. Image data entry error. No dial tone detected before start of dialing. Busy tone detected before dialing. 2nd dial tone not detected. No loop current detected.* Busy tone detected after dialing or called.
  • Page 115 Code 1 Code 2 Causes EOR and NULL received. Effective command not received. Unable to reserve a command receiver memory. Image data file error. Compatibility [checking the NSF and DIS] Code 1 Code 2 Causes Remote terminal only with V.29 capability in 2400 or 4800 bps transmission.
  • Page 116 Instructions received from the remote terminal [checking the NSC, DTC, NSS, and DCS] Code 1 Code 2 Causes Illegal coding system requested. Illegal recording width requested. ECM requested although not allowed. Polled while not ready. No document to send when polled. Nation code or manufacturer code not coincident.
  • Page 117 ID checking Code 1 Code 2 Causes Password plus "lower 4 digits of telephone number" not coincident. Password not coincident. Polling ID not coincident. Entered confidential mail box ID uncoincident with the mail box Relay broadcasting ID not coincident. Entered retrieval ID uncoincident with that of the mail box ID. DCN reception Code 1 Code 2...
  • Page 118 Signal isolation Code 1 Code 2 Causes Unable to detect video signals and commands within 6 seconds after CFR is transmitted. Received PPS containing invalid page count or block count. (10) Video signal reception Code 1 Code 2 Causes Error correction sequence not terminated even at the final transmission speed for fallback.
  • Page 119 (11) General communications-related Code 1 Code 2 Causes Unable to receive the next-page data. Unable to receive polling even during turn-around transmission due to call reservation. PC interface error. Transmission canceled by pressing the Stop key (before completion of the G3 FAX negotiation). Transmission canceled by pressing the Stop key (after completion of the G3 FAX negotiation).
  • Page 120 Modem error details (Code 3) Code 3 Causes Timeout waiting for INFO0. Checksum error in INFO0. Timeout waiting for tone A or B. Timeout waiting for first phase reverse. Timeout waiting for probing cut-off tone. Timeout waiting for second phase reverse. Timeout waiting for end of probing.
  • Page 121 Code 3 Causes S-sequence finished before prediction in phase 3. Timeout waiting for S-Sbar in phase 3. Timeout waiting for S-Sbar in phase 3. Timeout waiting for S in phase 3. Training after TRN failure. Problem with S-sequence in phase 4. FED turned off in S-sequence in phase 4.
  • Page 122 (14) Equipment error Code 1 Code 2 Causes Burn-in operation canceled by pressing the Stop key. Unrecoverable MODEM error. 6 -1 6...

  • Page 123: Troubleshooting

    6.2 TROUBLESHOOTING 6.2.1 Introduction This section gives the service personnel some of the troubleshooting procedures to be followed if an error or malfunction occurs with the facsimile equipment. It is impossible to anticipate all of the possible problems which may occur in future and determine the troubleshooting procedures, so this section covers some sample problems.
  • Page 124 Power requirements Check that: (1) The power supply specified on the rating plate located on the bottom of the machine is used. The supply voltage stays within the rating ±10%. (2) Each voltage level on AC input lines and DC lines is correct. (3) All cables and harnesses are firmly connected.

  • Page 125: Troubleshooting Procedures

    6.2.4 Troubleshooting Procedures [ 1 ] Control panel related Trouble Check: (1) LCD shows nothing. Panel-main harness between the main PCB and the control panel PCB Control panel PCB Low-voltage power supply PCB Main PCB (2) Control panel inoperative. Panel-main harness between the main PCB and the control panel PCB Control panel PCB FPC key...

  • Page 126: 3 ] Communications Related

    [ 3 ] Communications related Trouble Check: (1) No tone is transmitted. Main PCB NCU PCB [ 4 ] Paper/document feeding related Trouble Check: (1) Neither "COPY: PRESS COPY" Sensors by using the maintenance-mode function code nor "FAX: NO. & START" 32.

  • Page 127: 5 ] Print-Image Related

    [ 5 ] Print-image related If the received or sent image has any problem, first make a copy with the facsimile equipment. If the copied image is normal, the problem may be due to the remote terminal; if it is abnormal, proceed to the following checks: Trouble Action to be taken...
  • Page 128 Trouble Action to be taken (3) Light At the scanner Check the following components: - CIS unit - Main PCB At the printer side l Replace the toner cartridge with a new one and print 4 to 5 pages. If the problem persists, proceed to the next step. l Remove the toner cartridge and start printing.
  • Page 129 Trouble Action to be taken (5) Black and blurred vertical At the scanner stripes or band Check the following components: - CIS unit At the printer side Clean the paper path which may be contaminated with toner. Slide the wire cleaner to clean the corona wire inside the drum unit.
  • Page 130 Trouble Action to be taken (9) White vertical streaks At the scanner Check the following components: - CIS unit At the printer side l Clean the laser beam window on the laser unit. l Replace the toner cartridge. l Replace the drum unit. (10) White horizontal stripes At the printer side l Replace the drum unit.
  • Page 131 Trouble Action to be taken (12) Faulty image registration At the printer side (Leading edge of image starts Instruct the user not to load paper exceeding the limit in the ASF. too late on paper) Instruct the user to use the recommended types of paper. Replace the ASF.
  • Page 132 Trouble Action to be taken (15) Dirt back of paper At the printer side Clean the pressure roller in the heat-fixing unit. Replace the heat- fixing unit. Replace the drum unit. Replace the high-voltage power supply PCB. (16) Poor fixing At the printer side Instruct the user to use paper of the recommended weight (less than 36 lb./m...
  • Page 133 Trouble Action to be taken (20) Fading (black to white) At the printer side Replace the toner cartridge. Replace the high-voltage power supply PCB. (21) Gray background At the printer side Instruct the user to use paper of the recommended weight (less than 36 lb./m Clean the toner sensors (LED and light-receiver).

  • Page 134: Location Of High-Voltage Contacts And Grounding Contacts

    Location of High-voltage Contacts and Grounding Contacts Grounding Contacts High-voltage Contacts For transfer roller Drum unit For developer For cleaner roller roller For grid For corona wire 6 -2 8...
  • Page 135 FAX2800/MFC4800 Appendix 1. EEPROM Customizing Codes...
  • Page 136 EEPROM CUSTOMIZING CODES This function allows you to customize the EEPROM according to language, function settings, and firmware switch settings. Operating Procedure (1) To make the equipment enter the maintenance mode, press the Menu, *, 2, 8, 6, and 4 keys in this order.
  • Page 137 EEPROM Customizing Codes List Model Versions FAX2800 FAX2900 FAX3800 MFC4800 (FAX2850) U.S.A. 9001 9201 9001 9101 CANADA 0002 0202 0002 0102 AUSTRALIA 0006 0106 NEW ZEALAND 0027 0127 ASIA (SINGAPORE) 0040 0140 Model Versions FAX8070P MFC9070 GERMANY 0003 0103 U.K. 0004 0104 FRANCE...
  • Page 138 FAX2800/MFC4800 Appendix 2. Firmware Switches (WSW)
  • Page 139 WSW No. Function Reference Page WSW01 Dial pulse setting WSW02 Tone signal setting WSW03 PABX mode setting WSW04 TRANSFER facility setting WSW05 1st dial tone and busy tone detection WSW06 Pause key setting and 2nd dial tone detection WSW07 Dial tone setting 1 WSW08 Dial tone setting 2 WSW09...
  • Page 140 WSW01 (Dial pulse setting) Selector Function Setting and Specifications No. 1 2 Dial pulse generation mode 10-N No. 3 4 60 ms Break time length in pulse dialing 67 ms 40 ms (for 16 PPS) 64 ms (at 106-ms intervals) No.
  • Page 141 Selector 7: Switching between pulse (DP) and tone (PB) dialing, by the function switch This selector determines whether or not the dialing mode may be switched between the pulse (DP) and tone (PB) dialing by using the function switch. Selector 8: Default dialing mode, pulse (DP) or tone (PB) dialing This selector sets the default dialing mode (pulse dialing or tone dialing) which may be changed by the function switch.
  • Page 142 WSW03 (PABX* mode setting) Selector Function Setting and Specifications CNG detection when sharing a modular wall socket with a 0: A 1: B telephone No. 2 3 4 0 0 0 : 50 ms 0 0 1 : 210 ms 0 1 0 : 500 ms Min.
  • Page 143 Selectors 6 and 7: Dial tone detection in PABX These selectors activate or deactivate the dial tone detection function which detects a dial tone when a line is connected to the PABX. Setting both of these selectors to "1" activates the dial tone detection function so that the equipment starts dialing upon detection of a dial tone when a line is connected.
  • Page 144 WSW04 (TRANSFER facility setting) Selector Function Setting and Specifications Earth function in transfer facility 0: Provided Not provided Not used. No. 5 6 200 ms Earth time length for earth function 300 ms 500 ms 700 ms No. 7 8 80 ms Break time length for flash function 110 ms...
  • Page 145 WSW05 (1st dial tone and busy tone detection Selector Function Setting and Specifications No. 1 2 3 0 0 0 3.5 sec. WAIT 0 0 1 7.0 sec. WAIT 0 1 0 10.5 sec. WAIT 1st dial tone detection 0 1 1 14.0 sec.
  • Page 146 Selectors 5 and 6: Busy tone detection in automatic sending mode These selectors determine whether or not the equipment automatically disconnects a line upon detection of a busy tone in automatic sending mode. Setting selector 6 to "0" ignores a busy tone so that the equipment does not disconnect the line. Setting selectors 5 and 6 to "0"...
  • Page 147 WSW06 (Pause key setting and 2nd dial tone detection) Selector Function Setting and Specifications No. 1 2 3 0 0 0 No pause 0 0 1 3.5 sec. WAIT 0 1 0 7 sec. WAIT 0 1 1 10.5 sec. WAIT Pause key setting and 2nd dial tone 1 0 0 14 sec.
  • Page 148 Selectors 1 through 3: Pause key setting and 2nd dial tone detection Selectors No WAIT is inserted even if the Pause key is pressed. If you press the Pause key during dialing, the facsimile equipment will insert WAIT as defined in the above table. If the Pause key is pressed repeatedly, the equipment inserts the specified WAIT multiplied by the number of depressions.
  • Page 149 WSW07 (Dial tone setting 1) Selector Function Setting and Specifications No. 1 2 Narrows by 10 Hz Frequency band range Initial value Widens by 10 Hz Line current detection 0: No 1: Yes No. 4 5 6 0 0 0 -21 dBm 0 0 1 -24 dBm...
  • Page 150 WSW08 (Dial tone setting 2) Selector Function Setting and Specifications No. 1 2 3 0 0 0 50 ms 0 0 1 210 ms 0 1 0 500 ms 1st dial tone detection time length 0 1 1 800 ms 1 0 0 900 ms 1 0 1...
  • Page 151 WSW09 (Protocol definition 1) Selector Function Setting and Specifications Frame length selection 0: 256 octets 1: 64 octets Use of non-standard commands 0: Allowed 1: Prohibited No. 3 4 : 4 times No. of retries : 3 times : 2 times : 1 time T5 timer 0: 300 sec.
  • Page 152 WSW10 (Protocol definition 2) Selector Function Setting and Specifications Switching of DPS, following the 0: No 1: Yes CML ON/OFF Time length from transmission of 0: 100 ms 1: 50 ms the last dial digit to CML ON Time length from CML ON to 0: 2 sec.
  • Page 153 WSW11 (Busy tone setting) Selector Function Setting and Specifications No. 1 : Narrows by 10 Hz Frequency band range : Initial value : Widens by 10 Hz Not used. 1: 400-600/400-600 ms 1: 175-440/175-440 ms ON/OFF time length ranges 1: 100-1000/17-660 ms (More than one setting allowed) 1: 110-410/320-550 ms 1: 100-660/100-660 ms...
  • Page 154 WSW12 (Signal detection condition setting) Selector Function Setting and Specifications No. 1 1500 ms Min. OFF time length of calling 500 ms signal (Ci) 700 ms 900 ms No. 3 6 sec. Max. OFF time length of calling 7 sec. signal (Ci) 9 sec.
  • Page 155 WSW13 (Modem setting) Selector Function Setting and Specifications No. 1 0 km Cable equalizer 1.8 km 3.6 km 5.6 km No. 3 -43 dBm Reception level -47 dBm -49 dBm -51 dBm 0: 0 dB 1: 8 dB 0: 0 dB 1: 4 dB Modem attenuator 0: 0 dB...
  • Page 156 WSW14 (AUTO ANS facility setting) Selector Function Setting and Specifications No. 1 13 Hz Frequency band selection 15 Hz (Lower limit) 23 Hz 20 Hz No. 3 30 Hz Frequency band selection 55 Hz (Upper limit) 70 Hz 200 Hz No.
  • Page 157 WSW15 (REDIAL facility setting) Selector Function Setting and Specifications No. 1 5 minutes Selection of redial interval 1 minute 2 minutes 3 minutes No. 3 16 times 1 times No. of redialings 2 times 3 times 15 times Redialing for no response sent from Redialing No redialing the called terminal...
  • Page 158 WSW16 (Function setting 1) Selector Function Setting and Specifications Not used. CCITT superfine recommendation 0: OFF 1: ON Not used. Max. document length limitation 0: 400 cm 1: 90 cm Stop key pressed during reception 0: Not functional 1: Functional Selector 2: CCITT superfine recommendation If this selector is set to "1,"...
  • Page 159 WSW17 (Function setting 2) Selector Function Setting and Specifications No. 1 No alarm Always valid Off-hook alarm Valid except when 'call reservation' is selected. Not used. Calendar clock type U.S.A. type 1: European type Not used. Non-ring reception 1: ON Not used.
  • Page 160 WSW18 (Function setting 3) Selector Function Setting and Specifications Not used. No. 2 40 sec. Detection enabled time for CNG and 0 sec. (No detection) no tone 5 sec. 80 sec. Not used. Registration of station ID Permitted Prohibited No. 7 No monitoring Up to phase B at the Tone sound monitoring...
  • Page 161 WSW19 (Transmission speed setting in V. 17 mode) Selector Function Setting and Specifications No. 1 No. 4 First transmission speed choice for 2,400 bps fallback 4,800 bps 7,200 bps 9,600 bps 12,000 bps Last transmission speed choice for fallback 14,400 bps V.
  • Page 162 WSW20 (Overseas communications mode setting) Selector Function Setting and Specifications EP* tone prefix 0: OFF 1: ON Overseas communications mode 0: 2100 Hz 1: 1100 Hz (Reception) Overseas communications mode 0: OFF 1: Ignores DIS once. (Transmission) No. 4 5 : 100 ms Min.
  • Page 163 WSW21 (TAD setting 1) Selector Function Setting and Specifications Not used. Erasure of message stored in the 0: Yes memory after the message transfer Selector 8: Erasure of message Setting this selector to "0" will erase the message recorded in the memory after the document retrieval feature transfers the message.
  • Page 164 WSW23 (Communications setting) Selector Function Setting and Specifications 0: From the head of a series of zeros Starting point of training check (TCF) 1: From any arbitrary point No. 2 3 Allowable training error rate 0.5% No. 4 5 Decoding error rate for transmission of RTN Not used.
  • Page 165 WSW24 (TAD setting 2) Selector Function Setting and Specifications Not used. No. 3 4 4 sec. Time length from CML ON to start of pseudo ring backtone 3 sec. transmission 2 sec. 1 sec. 0 dB 8 dB Attenuator for playback of ICM/ OGM to the line 0 dB 4 dB...
  • Page 166 WSW25 (TAD setting 3) Selector Function Setting and Specifications No. 1 0 sec. Delay time for starting detection of 8 sec. voice signal 16 sec. 24 sec. No. 3 -43 dB (A) Detection level for no voice signal -46 dB (B) -49 dB (C) -51 dB (D) No.
  • Page 167 WSW26 (Function setting 4) Selector Function Setting and Specifications Not used. Dialing during document reading into the temporary memory in in-memory 0: Disabled 1: Enabled message transmission No. of CNG cycles to be detected No. 4 5 0.5 (A) (when the line is connected via the external telephone except in the external TAD mode or via the built- 1.5 (C)
  • Page 168 WSW27 (Function setting 5) Selector Function Setting and Specifications Definition of programmable key 0: TEL key 1: TEL/POLLING key Ringer OFF setting 0: Yes 1: No Not used. Detection of distinctive ringing 0: Yes 1: No pattern Not used. Toner save mode 0: Yes 1: No NOTE: Selector 1 takes effect only in models/versions having a TEL key.
  • Page 169 WSW28 (Function setting 6) Selector Function Setting and Specifications No. 1 2 3 0 0 0 0 dB 0 0 1 +1 dB 0 1 0 +2 dB Transmission level of DTMF high- 0 1 1 +3 dB band frequency signal 1 0 0 0 dB 1 0 1...
  • Page 170 WSW29 (Function setting 7) Selector Function Setting and Specifications Not used. Impedance switching control in pulse 0: OFF 1: ON dialing Beep when the memory area for the 0: No 1: Yes activity report becomes full NOTE: Selectors 7 and 8 are applicable to the European version only. Selector 8: Beep when the memory area for the activity report becomes full If this selector is set to "1,"...
  • Page 171 WSW31 (Function setting 9) Selector Function Setting and Specifications Not used. 0: 100% 1: Reduction rate specified Default reduction rate for failure of according to the current automatic reduction during recording paper size Not used. Minimum short-OFF duration in 0: 130 ms 1: 90 ms distinctive ringing Not used.
  • Page 172 WSW32 (Function setting 10) Selector Function Setting and Specifications Not used. No. 5 Standard Default resolution Fine Super fine Photo No. 7 Automatic Default contrast Super light Super dark Selectors 5 and 6: Default resolution These selectors set the default resolution which applies when the equipment is powered up or completes a transaction.
  • Page 173 WSW34 (Function setting 12 Selector Function Setting and Specifications Not used. No. of CNG cycles to be detected No. 4 (when the line is connected via the facsimile equipment in the F/T mode or via the external telephone in the external TAD mode) No.
  • Page 174 WSW36 (Function setting 14) Selector Function Setting and Specifications ECP* mode 0: ON 1: OFF Recovery from inactive PC interface 0: Disabled 1: Enabled PC power-off recognition time 0: Normal 1: Long Not used. Escape from phase C 0: Yes 1: No No.
  • Page 175 WSW37 (Function setting 15) Selector Function Setting and Specifications Printout of the stored image data of an unsent document onto the error 0: No report Erasure of the stored image data of an unsent document at the time of 0: No the subsequent in-memory message transmission Not used.
  • Page 176 WSW38 (Function setting 16 in V. 34 mode) Selector Function Setting and Specifications No. 1 X : Automatic Setting of the equalizer : Fixed to 4 points : Fixed to 16 points Sending level of guard tone at 0: Normal - 7 db Normal phase 2 Stepping down the transmission...
  • Page 177 WSW39 (Transmission speed setting in V. 34 mode) Selector Function Setting and Specifications No. 1 No. 5 2400 bps 4800 bps 7200 bps First transmission speed choice for fallback 9600 bps 12000 bps 14400 bps 16800 bps 19200 bps 21600 bps 24000 bps 26400 bps 28800 bps...
  • Page 178 WSW40 (Function setting 17 in V. 34 mode) Selector Function Setting and Specifications Not used. Not masking Masking No. 3 3429 symbols/sec No. 4 3200 symbols/sec Masking of symbol rate(s) No. 5 3000 symbols/sec No. 6 2800 symbols/sec No. 7 Not used.
  • Page 179 WSW41 (CCD fluorescent lamp and modem attenuator in V. 34 mode) Selector Function Setting and Specifications No. 1 2 3 0 0 0 16 hours 0 0 1 24 hours 0 1 0 12 hours ON-duration of the fluorescent lamp 0 1 1 8 hours built in the CCD unit...
  • Page 180 WSW42 (Function setting 18) Selector Function Setting and Specifications Incoming mail server POP* Incoming mail server SMTP* Internet-FAX forward function JBIG* coding system Disabled Enabled Not used. POP: Post Office Protocol SMTP: Simple Mail Transfer Protocol JBIG: Joint Bi-level Image Group NOTE: Selectors 1 through 3 are applicable to those models equipped with LAN interface.
  • Page 181 WSW44 (Speeding up scanning-1) Selector Function Setting and Specifications Not used. No. 6 7 8 0 0 0 : Obtained compensation data ineffective 0 0 1 : 1 min. Effective time length of the white 0 1 0 : 3 min. level compensation data obtained 0 1 1 : 5 min.
  • Page 182 WSW45 (Speeding up scanning-2) Selector Function Setting and Specifications No. 1 2 3 0 0 0 : No automatic drawing-in 0 0 1 : 1 sec. Delay time from when documents 0 1 0 : 2 sec. are set until the ADF starts drawing 0 1 1 : 3 sec.
  • Page 183 WSW46 (Monitor of PC ON/OFF state) Selector Function Setting and Specifications No. 1 2 0 0 : Disabled 0 1 : Monitor SELECT IN Monitoring the PC ON/OFF state 1 0 : Monitor STROBE 1 1 : Monitor both SELECT IN and STROBE Not used.
  • Page 184 FAX2800/MFC4800 Appendix 3. Circuit Diagrams A. Main PCB B. Network Control Unit (NCU) PCB C. Control Panel PCB D. Power Supply PCBs NOTE: Terms in circuit diagrams : Ceramic capacitor : Chemical capacitor...
  • Page 185 A. Main PCB (1/5)
  • Page 186 A. Main PCB (2/5)
  • Page 187 A. Main PCB (3/5)
  • Page 188 A. Main PCB (4/5)
  • Page 189 A. Main PCB (5/5)
  • Page 190 B. NCU PCB (U.S.A., Canada)
  • Page 191 B. NCU PCB (U.K., Norway, Netherlands, Finland, Denmark, Sweden)
  • Page 192 B. NCU PCB (Germany, France, Belgium, Switzerland, Ireland, Austria, Spain, Italy, South Africa)
  • Page 193 NCU PCB (Asia/Oceania) 1/2...
  • Page 194 NCU B53K479 ASSY NCU B53K479 ASSY ASSY ADRS. NAME NAME ZNR1 ENC121D07A Not Assy 1/16W 0 Not Assy SH-124DZ Not Assy DTC123EK Not Assy 1SS120 Not Assy JW15 JW(10) Not Assy JW29 JW (5) Not Assy JW31 Not Assy JW (5) JW43 Not Assy 1/16W 0...
  • Page 195 C. Control Panel PCB...
  • Page 196 Power Supply PCB (100-120V) Low-voltage power supply...
  • Page 197 Power Supply PCB (200-240V) Low-voltage power supply (Europe)
  • Page 198 Power Supply PCB (200-240V) Low-voltage power supply (Asia, Oceania)
  • Page 199 Power Supply PCB High-voltage power supply...
  • Page 200 June ’01 SM-FAX002 8X5601 Printed in Japan...

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