Page 1 FACSIMILE EQUIPMENT SERVICE MANUAL MODEL: MFC-3900ML / 4000ML 4500ML / 5500ML...
Page 2 © Copyright Brother 1995 All rights reserved No part of this publication may be reproduced in any from or by any means without permission in writing from the publisher. Specifications are subject to change without notice.
Page 3 This publication is a Service Manual covering the specifications, construction, theory of operation, and maintenance of the Brother facsimile equipment. It includes information required for field troubleshooting and repair--disassembly, reassembly, and adjustment--so that service personnel will be able to understand the function of the equipment, to repair the equipment quickly, and to order any necessary spare parts.
Page 4: General Description
CHAPTER I. GENERAL DESCRIPTION...
Page 5 CONTENTS EQUIPMENT OUTLINE ..................I-1 External Appearance .................I-1 Components ....................I-1 SPECIFICATIONS ....................I-2 Detail Specification Chart ................I-2 SAFETY INFORMATION ..................I-4 Laser Safety (110 - 120V Model only) ............I-4 CDRH Regulations (110 - 120V Model only) ..........I-4 Additional Information ................I-4 Cautions Relating to Laser Products ............
Page 6: Equipment Outline
1. EQUIPMENT OUTLINE 1.1 External Appearance The figure below shows the appearance of the equipment and its approximate dimensions. 213 mm Weight: 12.0 kg (excluding the paper cassette, toner cartridge, and drum unit) 1.2 Components The equipment has the following components: Paper Cassette Control Panel (Including the Panel PCB)
Page 7: Specifications
2. SPECIFICATIONS 2.1 Detail Specification Chart 1994/DEC/28 MODEL MFC-3900ML MFC-4000ML MFC-4500ML MFC-5500ML COLOR 1138 1138 1138 1138 FUNCTION Main FAX & Printer FAX & Printer FAX & Printer FAX & Printer Secondary Copy & Scanner Copy & Scanner Copy & Scanner Copy &...
Page 8 FAX Forwarding FAX Retrieval Paging OPTIONAL EXP. MEMORY for FAX Yes- plus 512KB or 1MB Yes- plus 512KB or 1MB for Printer Yes - 512KB or 1.5MB Yes - 512KB or 1.5MB Yes - 512KB or 1.5MB Yes - 1MB PC FAX (Send/Receive) Option Option...
Page 9: Safety Information
United States. The label shown below indicates compliance with the CDRH regulations and must be attached to laser products marketed in the United States. MANUFACTURED : BROTHER INDUSTRIES, LTD. 15-1, Naeshiro-cho, Mizuho-ku Nagoya 467, Japan. This product conforms with CDRH radiation performance standard 21 CFR chapter 1 subchapter J.
Page 10: Installation
CHAPTER II. INSTALLATION...
Page 11 CONTENTS DEALER OPTION ..................... II-1 Serial Interface Board ................II-1 Memory Board ..................II-1...
Page 12: Serial Interface Board
1. DEALER OPTION 1.1 Serial Interface Board Please refer to the section of the operations manual “15. OPTION”. 1.2 Memory Board The memory board is installed on the main PCB inside the machine. You can add the optional memory board both performance modes for the fax and the printer. Function Optional Memory for the Printer Additional memory is useful and may be necessary if you are downloading many different...
Page 13 Installation Unplug the power cord from the AC outlet and the interface cable. Remove the three screws and pull the main PCB toward you while holding it at the parts A. Main PCB Install each memory board onto the main PCB by plugging it into the connector. Make sure that the memory board is securely seated in the main PCB.
Page 14 When the optional memory board for the fax is installed, print out the MEMORY STATUS LIST to confirm whether it was installed correctly. Operation: Press Function, 1, 3, 8 and START keys in this order. Then the MEMORY STATUS LIST will be printed out. When the expandable memory is installed, the sentence, Option memory was installed, will be shown here.
Page 15: Theory Of Operation
CHAPTER III. THEORY OF OPERATION...
Page 16: Table Of Contents
CONTENTS OVERVIEW .......................III-1 Functional Block Diagram ............... III-1 Connection Diagram ................III-2 MECHANISMS ....................III-3 Transmitting Mechanism (Scanning and Feeding Documents) ....III-3 2.1.1 Scanner ..................III-3 Overview of Printing Mechanism ............III-4 Paper Transfer ..................III-5 2.3.1 Paper Supply ................III-5 2.3.2 Paper Registration ................
Page 17: Overview
1. OVERVIEW 1.1 Functional Block Diagram Panel RS232C RS422 RS232C Centronics Serial Option Fax Control Section Printer Control Section Printer Date Fax Data Line Speaker Scanning Laser Engine Paper Low/High (LED, CCD, Motor) Supply Voltage Process Handset Power Supply III - 1...
Page 18: Connection Diagram
1.2 Connection Diagram Toner Sensor PCB Laser Scanner LVPS Unit Eraser Lamp HVPS P1 LVPS 10Pin P4 EL 2Pin P7 LASER 5Pin P9 HVPS 6Pin P11 TONER 3Pin P8 S.MOTOR 5Pin P12 CHUKEI SB 13Pin Laser Scanner Motor P5 Fan 3Pin Fan Motor P6 M.MOTOR 6Pin...
Page 19: Mechanisms
2. MECHANISMS 2.1 Transmitting Mechanism (Scanning and Feeding Documents) The transmitting mechanism consists of the document stacker, automatic document feeder (ADF), rollers related to document feed, scanner, and document sensors. When the operator sets documents on the stacker, the insertion nip and the ADF feed them into the equipment, page by page.
Page 20: Overview Of Printing Mechanism
2.2 Overview of Printing Mechanism Multi-Purpose Tray Paper Supply Unit Papers Paper Pick Up Roller Process Unit Paper Registration Roller Photosensitive Drum Transfer Roller Hopper Plate Fixing Unit Pressure Roller Paper Registration Sensor Lever Eject Sensor Actuator Exit Roller Heater Roller Toner Cartridge Toner Developer...
Page 21: Paper Transfer
2.3 Paper Transfer 2.3.1 Paper Supply The pickup roller picks up one sheet of paper from the paper tray with every rotation and feeds the picked up sheets to the registration roller one by one. Pickup Roller Papers Registration Sensor Lever Hopper Plate Print Pad The paper is gripped between the pickup roller and the separation pad and separated into...
Page 22: Paper Eject
2.3.3 Paper Eject The completion of paper ejection is detected in the following manner: When the leading edge of the paper pushes up the eject sensor actuator located in the fixing unit, the photo sensor (photo interrupter) is opened and detects the start of paper eject motion.
Page 23: Process Unit
2.4 Process Unit 2.4.1 Photosensitive Drum Generates the latent electrostatic image and develops the image on the drum surface. 2.4.2 Primary Charger Generates a uniform charge on the drum surface. (1) Corona wire Generates ions on the drum. (2) Grid Spreads the ions evenly over the drum.
Page 24: Exposure Stage
2.5.2 Exposure Stage After the drum has been positively charged, it is exposed to the light emitted from the laser unit. Drum Laser Beam Paper Laser Beam lens Laser Detector Polygon Mirror Laser Diode Motor Lens The exposed area is the part to be printed. The surface potential of the exposed area is decreated forming an electrostatic image to be printed.
Page 25: Developing
2.5.3 Developing In the developing process, the toner is attracted to the electrostatic image on the drum so as to transform it into a visible image. The developer consists of the magnetic carrier and the magnetic toner. The developer makes the magnetic brush on the developer roller which includes the rotatable magnet roller.
Page 26: Drum Cleaning Stage
2.5.5 Drum Cleaning Stage In the image transfer stage, not all the toner on the photosensitive drum is transferred onto the paper; some of it remains on the drum. In the drum cleaning stage, the drum surface is cleaned by the cleaning blade, so that residual toner on the drum surface is removed and collected in the cleaning housing.
Page 27 Thermistor 2 Paper Cassette Cover Sensor Toner Empty Sensor Top Cover Sensor Paper Registration Sensor Front Document Sensor Paper Empty Sensor Thermistor 1 Rear Document Sensor Paper Eject Sensor III - 11...
Page 28: Control Electronics
3. CONTROL ELECTRONICS 3.1 Functional Diagram of Control Electronics To P. C. Control Panel PCB RS232C Centronics CCD Unit LED Array Main PCB Relay PCB B53K174 Scanning Motor B53K170 Speaker Document Sensors Main Motor High Voltage Power Supply Driver PCB Low Voltage B53K169 Line...
Page 29 Main PCB Circuit Diagram 1/7 CPU (for fax function) ROM (for fax function) Regular machine : 2 Mbit Demo sample machine / F/T OGM version / Multi language version : 4 Mbit CODEC IC Used for MFC-5500ML, Swiss, Norway and Swedish version. III - 13...
Page 30 Main PCB Circuit Diagram 2/7 MODEM III - 14...
Page 31 Main PCB Circuit Diagram 3/7 Connector for driver PCB Gate Array Has the following functions: Interface for fax function and printer function PCI control III - 15...
Page 32 Control of memory for fax Control of scanning data Control of the temperature of the heater used for printing PROM MFC-3900ML : -1 (16 kbyte) = 16 kbyte MFC-4000ML : -1 (16 kbyte) + -2 (4 kbyte) = 20 kbyte...
Page 33 Main PCB Circuit Diagram 5/7 DRAMs for fax function MFC-3900ML, 4000ML : -1 + -2 (256 kbyte) + -3 (512 kbyte) = 0.75 Mbyte MFC-4500ML : -1 + -2 = 1 Mbyte MFC-5500ML : -1 + -2 (1 Mbyte) + -3 (512 kbyte) = 1.5 Mbyte...
Page 34 Laser printer engine drive Centronics control between the printer and PC ROM (for printer function) 4 Mbit DRAMs (for printer function) MFC-3900ML, 4000ML, 4500ML : -1 = 512 kbyte MFC-5500ML : -1 + -2 = 1 Mbyte III - 18...
Page 35 Main PCB Circuit Diagram 7/7 Connector for connecting the centronics cable for the PC Connector for connecting the optional serial RS422A interface PCB for Macintosh Connector for connecting the optional memory for the printer function Two types of expansion RAM are available: 1 Mbyte and 1.5 Mbyte. Connector for connecting the RS232C cable for the PCI IC for RS232C Converts 0V...
Page 36: Driver Pcb
3.3 Driver PCB Incorporates the drivers that drive the scanning motor and main motor. Also has connectors for connection to the main PCB, NCU, power supply, laser scanner unit for printing, main motor, etc., and relays signals between the main PCB and each of these parts. Driver PCB Circuit Diagram 1/4 Connector for main PCB Main motor driver...
Page 37 Drive PCB Circuit Diagram 2/4 Connector for low voltage power supply NCU interface & connector Signal selector -1: Selects the receive signals input from the communications network through the NCU and feeds them to the MODEM on main PCB. -2: Selects either the receive signals selected by -1 or the sound signals (e.g.
Page 38 Driver PCB Circuit Diagram 3/4 Scanning motor driver Connector for relay PCB (PS) Connector for relay PCB (SA) Connector for relay PCB (SB) III - 22...
Page 39 Driver PCB Circuit Diagram 4/4 Main motor driver Connector for main motor driver Connector for toner sensor PCB Connector for exit sensor PCB Connector for high voltage power supply Connector for laser scanner motor Connector for laser scanner unit Connector for eraser lamp Connector for solenoid Connector for fan motor III - 23...
Page 40: Relay Pcb
3.4 Relay PCB All the scanning-related harness and harness from the operation panel are connected to this PCB since it relays the signals related to scanning and those from the operation panel to the driver PCB. Relay PCB Circuit Diagram Connector for panel harness Connector for CCD harness Connector for LED Array for illuminating the document...
Page 41: Ncu Pcb
3.5 NCU PCB The NCU PCB switches the communications line to telephone or built-in MODEM, under the control of the main PCB. NCU PCB Circuit Diagram The circuit shown above consists of the following elements: (a) Surge absorber (g) Calling signal detector (b) Noise filter (h) Loop current detector (c) Line relay (CML relay)
Page 42 • The primary function of the NCU, which is shared by facsimile and telephone units, is to switch the line to the facsimile unit or to the telephone; switching is carried out by the line relay. • Since the direct connection of a facsimile equipment to the line is not allowed in order to protect the line, it is essential to insert a line transformer between the line and the facsimile equipment to insulate them from each other in a direct current band.
Page 43: Control Panel Pcb
3.6 Control Panel PCB The control panel PCB and the main PCB communicate with each other by serially transmitting commands and data. The control panel unit consists of a 4-bit panel MPU, an LCD, and LEDs, which are controlled by the MPU according to commands issued from the CPU on the main PCB. The features include an MPU-integrated clock whose output is directly displayed on the LCD.
Page 44: Power Supply Pcb
3.7 Power Supply PCB Low Voltage Power Supply The power supply uses the switching regulation system to generate the regulated DC power supplies (+5V and +24V), which are converted from the AC line. (Heater) Thermal Fuse Fuse Lightning Heater Surge Circuit Absorber Lamp...
Page 45 High Voltage Power Supply Generates and outputs the voltages and currents for the charging, development and transfer involved in recording. Fuse Type Resistor OUT1 24VI Current 0.22 Regulator 1/6w (250µA) Control 1 (TIDN TAIDEN) B1 Q1 VR1 Transfer Unit OUT2 Voltage Regulator Photosensitive...
Page 46: Signal Functions And Facsimile Control Procedure
4. SIGNAL FUNCTIONS AND FACSIMILE CONTROL PROCEDURE 4.1 Control Signal Functions Two types of signalling are available for message exchange associated with facsimile transac- tions: binary coded signalling and tonal signalling. Binary coded signals The table below lists the functions of binary coded signals used for controlling the facsimile operations.
Page 47 Functions of Binary Coded Signals (1)-2 Function Signal Name Symbol Failure to Train A d i g i t a l r e s p o n s e r e j e c t i n g t h e t r a i n i n g s i g n a l a n d r e q u e s t i n g a r e t r a i n i n g .
Page 48 Functions of Binary Coded Signals for ECM (2)-2 Partial Page This signal indicates that the previous message has not Request been satisfactorily received and that the frames specified in the associated facsimile information field (FIF) are required to be retransmitted. Response for End This signal is the digital response to EOR signal.
Page 49: Signal Formats
4.2 Signal Formats The control signals used in the Group 3 mode have the frame compositions based on a high level data link control (HDLC) format. Each frame is subdivided into a number of fields. The tables below show the frame compositions of the control signals and the field description, respectively.
Page 50: Facsimile Control Procedure
4.3 Facsimile Control Procedure The figure below shows a typical facsimile control procedure between two facsimile equipment in the Group 3 mode. Facsimile Control Procedure in Group 3 Mode (Calling Station) (Called Station) Mode Change For Continuous Transmission of the Next Document III - 34...
Page 51 CHAPTER IV. DISASSEMBLY AND REASSEMBLY...
Page 52 CONTENTS DISASSEMBLY AND REASSEMBLY .............. IV-1 Safety Precautions .................... IV-1 Notes ........................ IV-3 Disassembly Order Flow ................... IV-4 Preparation ....................... IV-6 Handset Mount Assembly ............... IV-6 Control Panel Unit ................... IV-7 Panel Rear Cover Assembly, Panel PCB Assembly, FPC Key ....IV-8 Document Ejection Roller Assembly, Document Feed Roller Assembly .
Page 53: Disassembly And Reassembly
1. DISASSEMBLY AND REASSEMBLY Safety Precautions To prevent the creation of secondary problems due to mishandling, observe the following precautions during maintenance work. Always turn off the power before replacing parts or units. When carrying out work involving access to the power supply, be sure to unplug the power cord from the power outlet. Be careful not to lose screws, washers, or other parts removed for parts replacement.
Page 54 TORQUE SCREW NAME Q'TY USE FOR (kgf • TAPTITE, CUP B M4 10 PCB SUPPORT, N3 10.0 ± 1 TAPTITE, CUP B M4 10 PCB SUPPORT, N2 10.0 ± 1 GROUND PLATE TAPTITE, CUP S M3 6 4.5 ± 1 FOR DRAM-FR TAPTITE, CUP B M3 8 PE SENSOR...
Page 55: Notes
TORQUE SCREW NAME Q'TY USE FOR (kgf • TAPTITE, CUP B M3 10 COVER STOPPER 5.0 ± 1 TAPTITE, CUP B M3 10 LOWER HANDSET COVER 5.0 ± 1 UPPER HANDSET COVER 5.0 ± 1 TAPTITE, CUP B M3 10 TAPTITE, CUP S M3 8 PANEL REAR COVER 3.0 ±...
Page 56: Disassembly Order Flow 1/2
Disassembly Order Flow 1/2 IV - 4...
Page 57 Disassembly Order Flow 2/2 IV - 5...
Page 58: Preparation
Preparation • Prior to proceeding to the disassembly procedure, remove the document tray, paper tray, paper cassette, handset and process unit (drum unit and toner cartridge). Paper Cassette Handset Drum Unit Toner Cartridge Document Tray Paper Tray 1.1 Handset Mount Assembly Remove the two screws and the handset mount assembly.
Page 59: Control Panel Unit
1.2 Control Panel Unit Disconnect the following harnesses from the main PCB: panel, speaker, CCD, sensor, LED array and R-motor harnesses. Panel Harness (to P9) Speaker Harness (to P11) Sensor Harness (to P7) CCD Harness (to P5) LED Array Harness (to P3) R-motor Harness (to P4) Push the left and right arms of the control panel unit outwards with your thumbs to unhook them from the bosses on the scanner frame.
Page 60: Panel Rear Cover Assembly, Panel Pcb Assembly, Fpc Key
1.3 Panel Rear Cover Assembly, Panel PCB Assembly, FPC Key Remove the two screws. Remove the document pressure bar. Insert a flat screwdriver from the front between the panel cover and the panel rear cover assembly. Remove the panel rear cover while unhooking the pawls. Remove the panel PCB with FPC key while unhooking the pawls.
Page 61: Document Ejection Roller Assembly, Document Feed Roller Assembly
1.4 Document Ejection Roller Assembly, Document Feed Roller Assembly Remove the E-ring from the left-hand of the document feed roller assembly. Take the roller up while sliding the shaft to the right. Remove the gear cover. Lift the document ejection roller assembly up while sliding the shaft to the right. E-ring Gear Cover Document Ejection Roller Assy...
Page 62: Adf Cover
1.6 ADF Cover Remove the two screws. Unhook the four pawls with a flat screwdriver and remove the ADF cover from the main cover. ADF Cover Pawls Main Cover 1.7 Scanning Frame Remove the two screws. Lift the scanning frame to remove it from the main cover. LED Array Separation Rollers Cover...
Page 63: Speaker
1.8 Speaker Lift the speaker straight up to remove it. Speaker 1.9 Main Cover Remove the four screws. Unhook the two pawls from the bottom. Main Cover IV - 11...
Page 64: Relay Pcb
1.10 Relay PCB Disconnect the following harnesses from the relay PCB: driver SA, driver SB, driver PS and thermistor 1 harnesses. Driver SA Harness (to P10) Driver SB Harness (to P8) Driver PS Harness (to P2) Thermistor 1 Harness (to P1) Remove the three screws and relay PCB.
Page 65: Pcb Support Assembly
1.11 PCB Support Assembly Take off the harness from the clamp. Remove the two screws from the PCB support assembly. Remove the two screws from the bottom. Card Spacer PCB Support Assy Clamp 1.12 Paper Empty Sensor PCB Assembly Remove the screw. Disconnect the PE sensor harness, P solenoid harness and C solenoid harness from the PE sensor PCB.
Page 66: Upper Shoot Cover Assembly
1.13 Upper Shoot Cover Assembly Push the release link downward to release it from the projection on the fixing unit. Release the locks on the upper shoot cover assembly to turn up the assembly. Align the boss of the fixing unit with the cut out provided in the upper shoot cover assembly, then slide the assembly to the left to remove it from the fixing unit.
Page 67: Laser Unit
1.15 Laser Unit Disconnect the scanner motor harness and laser scanner harness from the main PCB. Remove the four screws. Lift out the laser unit. Mirror Laser Unit Scanner Motor Harness Laser Scanner Harness Note: Do not touch the inside of the laser unit or the mirror during disassembly and assembly.
Page 68: Interlock Levers
1.17 Interlock Levers Interlock levers Note: Grease the contacting parts of the levers on assembly. (Refer to Lubrication section.) 1.18 Fan Motor Disconnect the connector from the main PCB assembly. Fan Motor IV - 16...
Page 69: Solenoid P Assembly
1.19 Solenoid P Assembly Pull out the solenoid P from the frame by releasing the hook of the solenoid lever. Solenoid Lever 1.20 Gear Shaft Plate Remove the six screws securing the gear shaft plate. Gear Shaft Plate IV - 17...
Page 70: Gears
1.21 Gears Remove the gears shown below. Note: Grease the gear shafts and gear surfaces on the specified portion illustrated above when assembling. (Refer to Lubrication section.) 1.22 Solenoid C Assembly Take off the spring from main motor unit. Clutch Lever Spring Solenoid C Assy Main Motor Unit...
Page 71: Main Motor Unit
1.23 Main Motor Unit Disconnect the harness from the main PCB. Remove the two screws. Main Motor Unit 1.24 Main PCB Remove the three screws. Pull out the PCB toward you while holding it at the parts A. Note: On assembly, set the PCB in the card slot correctly and push it in straight. Main PCB IV - 19...
Page 72: Lower Plate
1.25 Lower Plate Turn the machine upside down. Remove the ten screws and then lift up the lower plate. Remove the screw which secures grounding wire to the lower plate. 1.26 PCBs Turn the machine upside down. Driver PCB High Voltage Power Supply PCB Low Voltage Power Supply PCB...
Page 73 Driver PCB (1) Remove the two screws. (2) Lift up the driver PCB, then disconnect the NCU PCB harness, relay harness (PS, SA, SB), main motor harness, fan motor harness, scanner motor harness, laser scanner harness, toner sensor PCB harness, eraser lamp harness, LVPS harness, HVPS harness, PE sensor PCB harness, and paper eject sensor harness.
Page 74 Low Voltage Power Supply PCB (1) Lift up the low voltage power supply PCB, then disconnect blue and brown heater harnesses and the main-LVPS harness. Low Voltage Power Supply PCB Heater Harnesses Main-LVPS Harness TE PCB (1) Remove the two screws and the I/F shield plate. (2) Remove the screw.
Page 75 NCU PCB (1) Remove the three screws. (2) Slide the NCU PCB inwards and lift it up, then remove the NCU harness. Insulator NCU PCB NCU Harness IV - 23...
Page 76: Lubrication
Lubrication ADF cover Apply a drop of Moli Coat EM-30L the size of a rice grain to the marked parts. Right side of the main body Apply a drop of Moli Coat EM-30L the size of a rice grain to the marked parts. IV - 24...
Page 77 Left side of the main body Apply a drop of Moli Coat EM-30L the size of a rice grain to the 24 locations indicated in the drawing. IV - 25...
Page 78 CHAPTER V. MAINTENANCE MODE...
Page 79 CONTENTS MAINTENANCE MODE ..................V-1 Entry into the Maintenance Mode ............V-1 Detailed Description of Maintenance-mode Functions ......V-3 1.2.1 PROM Parameter Initialization..........V-3 1.2.2 Scanning Compensation Data Initialization ......... V-4 1.2.3 Printout of Scanning Compensation Data ........V-4 1.2.4 ADF Performance Test ..............
Page 80: Maintenance Mode
1. MAINTENANCE MODE 1.1 Entry into the Maintenance Mode To make the facsimile equipment enter the maintenance mode, press the FUNCTION , 6 , and 4 keys in this order. Within 2 seconds The equipment beeps for approx. 3 seconds and displays “MAINTENANCE” on the LCD, indicating that it has entered in the initial maintenance mode, a mode in which the equipment is ready to accept entry using the keys.
Page 81 Maintenance-mode Functions (2) Function Reference Function Code Subsection (Page) Sensor Operational Check 1.2.8 (V-41) Printout of Registered Confidential Data 1.2.9 (V-42) CCD Scanner Area Setting 1.2.10 (V-42) Compound Pattern (Printer) 1.2.11 (V-43) Equipment Error Code Indication 1.2.12 (V-43) Communication Error Code Indication 1.2.13 (V-43) PROM Parameter Initialization (except the 1.2.1 (V-3)
Page 82: Detailed Description Of Maintenance-Mode Functions
"FUNCTION" Key "Mode" Key MFP-5500ML LASER MULTI-FUNCTION CENTER FINE AUTO Fax/Copy status PHOTO Printer status FIVE S.FINE PRINTER COPIER SCANNER FAX MODEM SUPER FUNCTION CLEAR TEL-INDEX RESOLUTION MODE COVERPAGE HELP Q..SCAN Facsimile Printer Copy A B C D E F HOOK ON/OFF LINE...
Page 83: Scanning Compensation Data Initialization
1.2.2 Scanning Compensation Data Initialization Function The equipment scans the white pressure bar, then writes the scanned compensation data to the E PROM, which is used for compensation of individual CCD properties in the scanning operation. Operating Procedure Press the 0 and 2 keys in this order in the initial maintenance mode. The “WHITE LEVEL INIT”...
Page 84: Adf Performance Test
1.2.4 ADF Performance Test Function The equipment counts the documents fed by the automatic document feeder (ADF) and displays the count on the LCD to check the performance of the ADF. Operating Procedure Set documents. (Can be set up to the ADF capacity.) The “DOC.
Page 85 Test Pattern 1 (Fax) V - 6...
Page 86 1.2.6 Firmware Switch Setting and Printout [ A ] Firmware switch setting Function The facsimile equipment incorporates the following firmware switch functions (WSW01 through WSW32) which may be activated with 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 87 Operating Procedure Press the 1 and 0 keys in this order in the initial maintenance mode. The equipment displays “WSW00” on the LCD and becomes ready to accept a firmware switch number. Enter the desired number from among the firmware switch numbers (01 through 29). The following appears on the LCD: WSWxx 0 0 0 0 0 0 0 0...
Page 88 Detailed Description of the Firmware Switches WSW01 (Dial pulse setting) Selector Function Setting and Specifications Dial pulse generation mode 10-N 60 ms Break time length in pulse dialing 67 ms (for 10 PPS) 40 ms (for 16 PPS) 64 ms 800 ms Inter-digit pause 850 ms...
Page 89 Selector 7: Switching between pulse (DP) and tone (PB) dialing with 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 90 WSW03 (PABX* mode setting) Selector Function Setting and Specifications Not used. No. 2 3 4 0 0 0 : 50 ms 0 0 1 : 210 ms Min. detection time length of PABX 0 1 0 : 500 ms dial tone, required for starting dialing 0 1 1 : 800 ms 1 0 0 : 900 ms 1 0 1 : 1.5 sec.
Page 91 Selector 8: “R” key function This selector determines whether or not the 1st dial tone detection function (specified by selectors 1 through 3 of WSW05) is added to the R key. If this selector is set to “0”, pressing the R key automatically activates the 1st dial tone detection function when PABX and automatic calling are selected by using the function switch.
Page 92 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 93 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 the automatic sending mode. Setting selector 6 to “0” causes a busy tone to be ignored so that the equipment does not disconnect the line.
Page 94 Selectors 1 through 3: PAUSE key setting and 2nd dial tone detection Selectors No WAIT is inserted even if the PAUSE key is pressed. Pressing the PAUSE key inserts a WAIT in pulse dialing, as defined in the above table. If the PAUSE key is pressed repeatedly, the equipment beeps a refusal sound and refuses the entry.
Page 95 WSW07 (Dial tone setting 1) Selector Function Setting and Specifications No. 1 Frequency band range Narrows by 10 Hz Initial value Widens by 10 Hz Line current detection 0 : No 1 : Yes No. 4 - 21 dBm -24 dBm 2nd dial tone detection level -27 dBm (Z = 600...
Page 96 WSW08 (Dial tone setting 2) Selector Function Setting and Specifications No. 1 50 ms 210 ms 500 ms 1st dial tone detection time length 800 ms 900 ms 1.5 sec. 2.0 sec. 2.5 sec. No. 4 5 10 sec. Time-out length for 1st and 2nd dial 20 sec.
Page 97 WSW09 (ECM and protocol definition 1) Selector Function Setting and Specifications Frame length selection 0 : 256 octets 1 : 64 octets Not used. No. of retries No. 3 4 times 3 times 2 times 1 time T5 timer 0 : 300 sec. 1 : 60 sec.
Page 98 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 the 0 : 100 ms 1 : 50 ms last dial digit to CML ON Time length from CML ON to CNG 0 : 2 sec.
Page 99 WSW11 (Busy tone setting) Selector Function Setting and Specifications No. 1 Frequency band range Narrows by 10 Hz 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 : 700-800/700-800 ms (More than one setting allowed) 1 : 110-410/320-550 ms 1 : 100-660/100-660 ms...
Page 100 WSW12 (Signal detection condition setting) Selector Function Setting and Specifications No. 1 Min. OFF time length of calling 300 ms signal (Ci) 500 ms 700 ms 900 ms No. 3 6 sec. Max. OFF time length of calling 7 sec. signal (Ci) 9 sec.
Page 101 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 (Z = 600 -47 dBm -49 dBm -51 dBm 0 dB 8 dB Modem attenuator 0 dB 4 dB 0 dB...
Page 102 WSW14 (AUTO ANS facility setting) Selector Function Setting and Specifications No. 1 13 Hz Frequency band selection 15 Hz (Lower limit) 23 Hz 27 Hz No. 3 30 Hz Frequency band selection 55 Hz (Upper limit) 70 Hz 70 Hz No.
Page 103 WSW15 (REDIAL facility setting) Selector Function Setting and Specifications No. 1 5 minutes Selection of redial interval 1 minutes 2 minutes 3 minutes No. 3 16 times 1 time No. of redialings 2 times 3 times 15 times Not used. Selectors 1 through 6: Selection of redial interval and No.
Page 104 WSW16 (Function setting 1) Selector Function Setting and Specifications Not used. CCITT superfine recommendation 0 : OFF Remote reception 0 : Only from the 1 : From all connected telephones external connected telephone Not used. STOP button in automatic receiving 0 : Inoperative 1 : Operative mode...
Page 105 WSW17 (Function setting 2) Selector Function Setting and Specifications No. 1 No alarm Off-hook alarm Always valid Always valid Valid except when 'call reservation' is selected. Power failure report output Alternate display Calendar clock type 0 : U.S.A. type 1 : European type Error indication in activity report Non-ring reception Not used.
Page 106 WSW18 (Function setting 3) Selector Function Setting and Specifications CCD manufacturer setting Fixed to 0 0 1. ACS* check sheet output function Operative Inoperative on/off key ACS* check sheet output function Registration of station ID Permitted Prohibited No. 7 X : No monitoring 0 : Up to phase B at the Tone sound monitoring calling station only...
Page 107 WSW19 (Transmission speed setting) Selector Function Setting and Specifications No. 1 No. 4 Initial transmission speed for fallback 2,400 bps 4,800 bps 7,200 bps Final transmission speed for fallback 9,600 bps Not used. Selectors 1 through 6: Transmission speed for fallback These selectors are used to select the MODEM speed range for starting and ending fallback.
Page 108 WSW20 (Overseas communications mode setting) Selector Function Setting and Specifications EP* tone prefix Overseas communications mode 0 : 2100 Hz 1 : 1100 Hz (Reception) Overseas communications mode 0 : OFF 1 : Ignores DIS once. (Transmission) No. 4 100 ms Min.
Page 109 WSW21 (TAD setting 1) Selector Function Setting and Specifications No. 1 2 3 4 5 0 0 0 0 0 : No detection 0 0 0 0 1 : 1 sec. 0 0 0 1 0 : 2 sec. Max. waiting time for voice signal 0 0 0 1 1 : 3 sec.
Page 110 WSW23 (Communications setting) Selector Function Setting and Specifications 0 : From the head of a series of zeros Starting point of training check (TCF) 1 : From any arbitrary point No. 2 Allowable training error rate 0.5% No. 4 Decoding error rate for transmission of RTN Transmission of RTN at the occurrence of a pagination error...
Page 111 Selector 8: Limitation of attenuation level Setting this selector to “0” limits the transmitting level of the modem to up to 10 dB. This setting has priority over the setting selected with WSW13 (selectors 5 through 8). WSW24 (TAD setting 2) Selector Function Setting and Specifications...
Page 112 Selectors 3 and 4: Detection level for no voice signal These selectors set the detection level for no voice signal in the TAD mode (when the external TAD is connected to the equipment). Selectors 5 through 7: Pause between paging number and PIN These selectors set the pause time between the paging telephone number and PIN (Private Identification Number) for the paging feature.
Page 113 WSW27 (Function setting 5) Selector Function Setting and Specifications Not used. Ringer OFF setting 0 : Yes 1 : No Not used. Detection of distinctive ringing 0 : No 1 : Yes pattern Not used. Toner save mode 0 : Yes 1 : No Selector 2: Ringer OFF setting...
Page 114 If it is set to “1”, the MFC-3900ML/4000ML/4500ML issues a fine resolution statement and the MFC-5500ML issues a superfine resolution statement. However, the empty space of the...
Page 115 WSW29 (Function setting 7) Selector Function Setting and Specifications Not used. Resolution switching when the 0 : Fixed to standard PC interface is connected 1 : Standard/fine switchable Not used. Selector 7: Resolution switching when the PC interface is connected When the PC interface is connected, this selector determines whether or not the standard resolution selected for the 1st page can be switched to the fine resolution for the 2nd and the subsequent pages.
Page 116 WSW31 (Function setting 9) Selector Function Setting and Specifications Demo sheet output 0 : Yes 1 : No Print at 100% if automatic reduction 0 : Yes 1 : No not possible Size check of recording paper in 0 : Yes 1 : No activity report Cooling fan during the standby state...
Page 117 WSW32 (Function setting 10) Selector Function Setting and Specifications No. 1 First reception time-out for PP 5 min. 10 min. 30 min. No. 3 Reception time-out during PP 10 sec. 1 min. 5 min. No. 5 Resolution home position FINE S.
Page 118 [ B ] Printout of firmware switch data Function The equipment prints out the setting items and contents specified by the firmware switches. Operating Procedure Press the key twice in the initial maintenance mode. The “CONFIG LIST” will appear on the LCD. The equipment prints out the firmware switch data list as shown in the figure below.
Page 119 1.2.7 Operational Check of Control Panel PCB Function This function checks the control panel PCB for normal operation. Two types of check modes are available: Key & button operation check mode and LED operation check mode. Operating Procedure [a] Key & button operation check mode Press the 1 and 3 keys in this order in the initial maintenance mode.
Page 120 [b] LED operation check mode Press the 1 and keys in this order in the initial maintenance mode. All of the LEDs will come on and go off, then each LED will light for 0.5 second in the following order: FINE S.FINE AUTO...
Page 121 1.2.9 Printout of Registered Confidential Data Function The equipment prints out names, retrieval IDs, and confidential IDs registered in the confidential box. Operating Procedure Press the keys in this order in the initial maintenance mode. The “CONF. MAIL BOX” will appear on the LCD. The equipment prints out the registered confidential data.
Page 122 1.2.11 Compound Pattern (Printer) Function This function checks the printing quality of the data output from the PC. Operating Procedure Press the 7 and keys in this order in the initial maintenance mode. The figure on the next page shows compound pattern. 1.2.12 Equipment Error Code Indication Function...
Page 123 CHAPTER VI. TROUBLESHOOTING...
Page 124 CONTENTS TROUBLESHOOTING ..................VI-1 Troubleshooting Malfunctions ..............VI-2 Printing Image Defects ................VI-7 1.2.1 Image Defect Examples ............... VI-7 1.2.2 Troubleshooting Image Defects ............ VI-8 INDICATION OF ERROR ................VI-16 Equipment Errors .................. VI-16 2.1.1 Error Messages on the LCD ............VI-16 2.1.2 Error Codes Shown in the “MACHINE ERROR xx”...
Page 125: Troubleshooting
1. TROUBLESHOOTING Introduction This chapter gives the service personnel some of the troubleshooting procedures to be followed if an error or malfunction occurs when using the facsimile equipment. It is impossible to anticipate all of the possible types of trouble which may occur in the future and determine the troubleshooting procedures, so this chapter covers only some types of trouble as examples.
Page 126: Troubleshooting Malfunctions
1.1 Troubleshooting Malfunctions When implementing the countermeasures for malfunctions described in this section, check connectors for faulty contact before measuring the voltage at the specified connector pins. Control panel related Trouble Action to be taken (1) LCD shows nothing. Check the harness between the relay PCB and the control panel.
Page 127 Trouble Action to be taken (3) Speaker silent during Check whether the ordinary dialing function (other than on-hook dialing. the on-hook dialing with the hook key) works correctly. - If it does, proceed to the following checks. - If it does not, refer to item (1). Check the speaker.
Page 128 Paper feed related Trouble Action to be taken (1) Neither the “COPY: Check the sensors using maintenance-mode 32. PRESS COPY” nor Refer to chapter V, subsection 1.2.8 (V-41). “FAX: NO. & START” Check the document sensors. message appears although documents Check the main PCB.
Page 129 Image related If there is any trouble with the received or sent image, first make a copy with the facsimile equipment. If the copied image is normal, the remote terminal is defective. If it is abnormal, refer to the troubleshooting table below: Trouble Action to be taken (1) All white images.
Page 130 Trouble Action to be taken (5) Faint/dark image. [At scanning side] Check the scanning frame assy. Check the main PCB. [At recording side] Refer to section 1.2. (6) Improper image alignment. [In communications] Check the displayed error code. Refer to section 2 (VI-16~). Check the connection between the driver PCB and the NCU PCB.
Page 131: Printing Image Defects
Printing Image Defects 1.2.1 Image Defect Examples I-1 Light I-2 Dark I-3 Completely blank I-4 All black I-5 Dirt back of paper I-6 Black vertical streaks I-6 Black and blurred I-7 Black and blurred vertical stripes horizontal stripes I-8 Dropout I-9 White vertical streaks I-10 Faulty I-11 Poor fixing...
Page 132: Troubleshooting Image Defects
1.2.2 Troubleshooting Image Defects Procedures to be followed in the event of specific image defects. Light Possible cause Step Check Result Remedy Poor contrast Is the contrast adjustment dial in Set it to the center click the center of the click position? position or reasonable position.
Page 133 Dark Possible cause Step Check Result Remedy Contrast Is the contrast adjustment dial at Set it to the center click failure the center click position? position or reasonable position. Corona failure Is the corona wire soiled? Clean the corona wire. (soiled wire) Corona failure Are the corona electrodes between the printer...
Page 134 All black Possible cause Step Check Result Remedy Corona failure Is the drum unit corona wire broken? Replace the drum unit. Are the charging terminal spring at the printer Clean the charging wire Ditto body side and the electrode on the bottom face at the both sides.
Page 135 Black vertical streaks Black and blurred vertical stripes Possible cause Step Check Result Remedy Drum unit Are the vertical streaks about 1 ~ 5 length Replace the drum unit. failure at 94mm intervals? Soiling of the Is the paper tray or feed system on the drum Clean the toner off.
Page 136 Black and blurred horizontal stripes Possible cause Step Check Result Remedy Scratch on the Are the horizontal stripes at 94 mm intervals? Replace the drum unit drum Toner stuck on Are the horizontal stripes at 45 mm intervals? Print several sheets and see the sleeve what happens.
Page 137 White vertical streaks Possible cause Step Check Result Remedy Laser scanner Is the window of the laser scanner soiled? Clean the window with a soiling dry cloth. Transfer failure Replace the drum unit. I-10 Faulty registration Possible cause Step Check Result Remedy Excessive...
Page 138 I-11 Poor fixing Possible cause Step Check Result Remedy Printing paper Is paper with a thickness of greater than 36 lb. Instruct the user to use being used? paper of the recommended thickness. Toner sensing Is the problem solved by replacing the drum The carrier of the developer failure unit or the toner cartridge?
Page 139 I-12 Image distortion Possible cause Step Check Result Remedy Laser scanner Is the scanner unit secured to the frame Secure the unit correctly with correctly? the screws. Is there any play? Laser scanner Is laser motion or the laser scanner motor Replace the laser scanner LD emission defective?
Page 140: Indication Of Error
2. INDICATION OF ERRORS 2.1 Equipment Errors If an equipment error occurs, the facsimile equipment emits an audible alarm (continuous beep) for approximately 4 seconds and shows the error message on the LCD. For details on error messages, see subsection 2.1.1. One of the error messages, “MACHINE ERROR xx” includes an error code which indicates the detailed error causes listed in subsection 2.1.2.
Page 141: Error Codes Shown In The "Machine Error Xx" Message
Messages on the LCD Probable Cause CHANGE TONER The toner empty sensor has detected that there is no toner. TONER EMPTY When this message is displayed, recording is not possible. CHANGE TONER The toner empty sensor has detected that there is not enough toner. SET CARTRIDGE It has been detected that no toner cartridge is installed.
Page 142 Error Code Error factor (Hex.) Faulty operation of DMA0 during scanning Faulty operation of DMA1 during scanning One-line feeding time-out error One-line scanning time-out error Document feed-in amount measuring error Less than 50% white level data error CODEC LSI error Light emission intensity error of the LED array Scanning error: The left-hand black reference line which is marked on the document pressure bar for scanning width...
Page 143: Communications Errors
2.2 Communications Errors If a communications error occurs, the facsimile equipment emits an audible alarm (intermittent beeping) for approximately 4 seconds, displays one of the error messages on the LCD, and prints out a transmission verification report if the equipment is excuting a sending operation.
Page 144 <Error Codes> Calling Code 1 Code 2 Causes Wrong number called. No dial tone detected. Busy tone detected before dialing. 2nd dial tone not detected. No loop current detected. Busy tone detected after dialing. Tone not detected (After dialing). No response from the called station. (Tx) No response from the called station (Rx).
Page 145 Compatibility [checking the NSF and DIS] Code 1 Code 2 Causes Remote terminal only with V.29 capability in 2400 or 4800 bps transmission. Remote terminal not ready for polling. Remote terminal not equipped with password function or its password switch OFF. Remote terminal not equipped with or not ready for confidential mail box function.
Page 146 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 147 ID checking Code 1 Code 2 Causes Password plus lower 4 digits of telephone number not coincident. Password not coincident. Polling ID coincident. Entered confidential mail box ID not coincident with the mail box ID. Relay broadcasting ID not coincident. Entered retrieval ID not coincident with that of the mail box ID.
Page 148 Signal isolation Code 1 Code 2 Causes Unable to detect video signals and commands within 6 seconds after CFR is transmitted. PSS with wrong page count or block count received. (10) Video signal reception Code 1 Code 2 Causes Error correction sequence not terminated even at the final transmission speed for fallback.
Page 149 (12) Maintenance mode Code 1 Code 2 Causes Failed to detect 1300 Hz signal in burn-in operation. Failed to detect PB signals in burn-in operation. Failed to detect command from RS232C in burn-in operation. (13) Equipment error Code 1 Code 2 Causes Equipment error (For xx, refer to subsection 2.1.2.) VI - 25...
Page 150 MFC-3900ML/4000ML/4500ML/5500ML APPENDICES U.S. and Canadian Versions Circuit Diagrams Main PCB Driver PCB Relay PCB Network Control Unit (NCU) PCB Control Panel PCB Power Supply PCB...
Page 151 Feb. '95 5X5181 Printed in Japan...

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