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Brother IntelliFax-3550 Service Manual

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FACSIMILE EQUIPMENT

SERVICE MANUAL

MODEL: FAX3550/3650/8000P/8200P
MFC4450/4550/4550plus
MFC6550MC/7550MC/7650MC
MFC9000/9500

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Summary of Contents for Brother IntelliFax-3550

  • Page 1: Service Manual

    FACSIMILE EQUIPMENT SERVICE MANUAL MODEL: FAX3550/3650/8000P/8200P MFC4450/4550/4550plus MFC6550MC/7550MC/7650MC MFC9000/9500...
  • Page 2 © Copyright Brother 1998 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 opera- tion, 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 equipment function, to rapidly repair the equipment and order any necessary spare parts.

  • Page 4: Safety Information

    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 opera- tion.
  • Page 5 CHAPTER I. GENERAL DESCRIPTION...
  • Page 6 CONTENTS EQUIPMENT OUTLINE ................. 1.1 External Appearance and Weight ............1.2 Components .................... I-1 SPECIFICATIONS ..................I-2...

  • Page 7: Equipment Outline

    1. EQUIPMENT OUTLINE External Appearance and Weight The figure below shows the equipment appearance and approximate dimensions. 251 (H) 452 (D) 383 (W) (Unit: mm) (excluding the handset) Weight: Machine proper Approx. 8.5 kg (excluding the drum unit and toner cartridge) In package Approx.

  • Page 8: Specifications

    2. SPECIFICATIONS (1/2) MODEL FAX3550 MFC4550 MFC6550MC MFC7550MC COLOR 1267 1138 1138 1138 PRINTER Option Engine — HL-720 HL-730 HL-730 — — 600 x 600 600 x 600 600 x 600 Paper Capacity Standards — Windows GDI (600x600) Windows GDI (600x600) Windows GDI (600x600) Emulation —...
  • Page 9 (1/2) MODEL FAX3650 MFC4450 MFC4550plus MFC7650MC COLOR 1267 1138 1138 1138 PRINTER Option Engine — HL-720 HL-720 HL-730 — 200 x 200 600 x 600 600 x 600 600 x 600 Paper Capacity Standards Windows GDI (200x200) Windows GDI (600x600) Windows GDI (600x600) Windows GDI (600x600) Emulation...
  • Page 10 (1/2) MODEL FAX8000P MFC9000 MFC9500 FAX8200P COLOR 1138 1138 1138 1138 PRINTER Option Option Engine — HL-730 HL-730 — — — — 600 x 600 (GDI) / 300 x 300 (PCL4) 600 x 600 (GDI) / 300 x 300 (PCL4) —...
  • Page 11 (2/2) MODEL FAX3550 MFC4550 MFC6550MC MFC7550MC Coverpage Yes, Super Yes, Super Yes, Super Yes, Super Polling Type Std/Del/Seq Std/Del/Seq Std/Del/Seq Std/Del/Seq Receive password Delayed Transmission Yes, 3 timings Yes, 3 timings Yes, 3 timings Yes, 3 timings Call Reservation Callback Message Page Memory (TX)* 300 KB (30 pgs: MMR) 200 KB (20 pgs: MMR)
  • Page 12 (2/2) MODEL FAX3650 MFC4450 MFC4550plus MFC7650MC Coverpage Yes, Super Yes, Super Yes, Super Yes, Super Polling Type Std/Del/Seq Std/Del/Seq Std/Del/Seq Std/Del/Seq Delayed Transmission Yes, 13 timings Yes, 3 timings Yes, 3 timings Yes, 13 timings Call Reservation Yes (with External) Callback Message Page Memory (TX)* 1 MB (100 pgs: MMR)
  • Page 13 (2/2) MODEL FAX8000P MFC9000 MFC9500 FAX8200P Coverpage Yes, Super Yes, Super Yes, Super Yes, Super Polling Type Std/Del/Seq/Sec Std/Del/Seq/Sec Std/Del/Seq/Sec Std/Del/Seq/Sec Receive password Yes/Plus Yes/Plus Yes/Plus Yes/Plus Delayed Transmission Yes, 3 timings Yes, 3 timings Yes, 3 timings Yes, 3 timings Call Reservation Callback Message Page Memory (TX)*...
  • Page 14 CHAPTER II. INSTALLATION...
  • Page 15 CONTENTS INSTALLING THE UPDATE DATA TO THE FACSIMILE EQUIPMENT....II-1...
  • Page 16 INSTALLING THE UPDATE DATA TO THE FACSIMILE EQUIPMENT If the program version is updated or the main PCB is replaced, install the update program onto the flash ROM of the main PCB. The program installation requires a host computer satisfying the following requirements: - CPU Pentium 75 or higher - RAM...
  • Page 17 Installing the update data onto the flash ROM of the facsimile equipment Load the floppy disk which stores the update data and transfer utility into the floppy disk drive of your computer. (Or, copy the update data and transfer utility onto the same directory of the hard disk.) Click the Start button, point to Programs, and then click MS-DOS Prompt to open an MS- DOS window.
  • Page 18 CHAPTER III. THEORY OF OPERATION...

  • Page 19: Table Of Contents

    CONTENTS OVERVIEW ..................... III-1 MECHANISMS ....................III-2 2.1 Scanner Mechanism ................III-3 2.1.1 Document feeding and ejecting mechanism ........III-3 2.1.2 Document scanning mechanism ............. III-3 2.2 Laser Printing Mechanism ..............III-4 2.2.1 Paper pulling-in, registration, feeding, and ejecting mechanism ..III-4 2.2.2 Print process mechanism ..............

  • Page 20: Overview

    1. OVERVIEW PC/AT RS-232C RS-422 Control Centronics RS-232C panel (Modular connector) parallel interface Optional serial interface (Extended I/O connector) [MFC4450/ [FAX3550/3650/ 4550/4550plus/ 8000P/8200P] [MFC6550MC/7550MC/ 6550MC/7550MC/7650MC/ 7650MC/9000/9500] 9000/9500] Fax Control Section Laser Printing Control Section Printer data Fax data Speaker Laser printing unit Paper Scanner unit Low- and...

  • Page 21: Mechanisms

    2. MECHANISMS The equipment 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) –...

  • Page 22: Scanner Mechanism

    Scanner Mechanism ADF parts Nip-related Document Document feed roller ASSY parts Document pressure bar Document ejection roller ASSY Document feeding and ejecting mechanism Document stacker Document scanning mechanism 2nd mirror Document tray Document front sensor actuator (Front) Document take-in roller ASSY CCD unit Separation roller ASSY Lens...

  • Page 23: Laser Printing Mechanism

    Laser Printing Mechanism 2.2.1 Paper pulling-in, registration, feeding, and ejecting mechanism Paper pulling-in and registration mechanism Paper Sheet feeder cover Paper feeding mechanism Pull-in roller Paper ejecting mechanism Multi-purpose sheet feeder Paper ejection roller Hopper Registration sensor actuator Registration roller Paper ejection sensor actuator Paper tray...
  • Page 24 Paper pulling-in and registration mechanism Solenoid lever Clutch release lever Pull-in roller drive gear Planetary Solenoid spring Intermediate gear gear system Clutch spring Clutch gear Paper feed solenoid (Front) Gear drive unit Heater roller drive gear Paper ejection Main motor roller drive gear Gear 20/90 Drum drive gear...

  • Page 25: Print Process Mechanism

    2.2.2 Print process mechanism Transfer roller Paper Drum unit Toner augers Toner cartridge Developer roller Toner sensor Laser-sensitive drum Toner supply roller Cleaner roller Charger (Corona wire) Polygon mirror Polygon motor Mirror Laser unit Mirror Cover glass The print process unit works with laser beam, electrical charges, and toner. The graph be- low shows the transition of electrical charge on the surface of the laser-sensitive drum through the five processes: charging, exposing, developing, transferring, and erasing pro- cesses.
  • Page 26 (1) Charging process The high-voltage power supply applies DC bias to the corona wire to generate ion on the grid. The ion uniformly charges the surface of the laser-sensitive drum to approx. 1000V which is kept by the varister grounding the grid to the frame. Approx.
  • Page 27 (3) Developing process The developing process develops an electrostatic latent image formed on the drum in the exposing process, into a toner image. The developer roller attracts the toner particles fed from the toner cartridge by the toner sup- ply roller, and then conveys them to the contact section with the laser-sensitive drum. On the contact section between the developer roller and drum, the positive toner particles stick to the neutralized spots on the drum according to the principles of attraction and repul- sion, transforming a latent image into a toner image.

  • Page 28: Heat-Fixing Mechanism

    2.2.3 Heat-fixing mechanism Pressure roller (Paper ejection roller) Heater roller (including the FU lamp) Paper Heat-fixing unit (Paper ejection sensor actuator) As the paper passes between the heater roller and the pressure roller in the fixing unit, the heater roller fuses the toner on the paper. III –...

  • Page 29: Sensors And Actuators

    Sensors and Actuators This equipment has ten sensors: two microswitches, six photosensors and two thermisters as described below. Sensor name Type Located on Hook switch sensor Microswitch Hook switch PCB Cover sensor Microswitch Relay PCB Registration sensor Photosensor (PC1) Relay PCB Sheet feeder cover sensor Photosensor (PC2) Relay PCB...
  • Page 30 Registration sensor actuator Registration sensor (Photosensor) (Main PCB) Toner thermister Sheet feeder cover sensor actuator (Relay PCB) (On back of PCB) Sheet feeder cover sensor Toner sensor (Photosensor) (Low-voltage power Cover sensor actuator supply PCB) Cover sensor (Microswitch) Hook switch sensor (Microswitch) (High-voltage power supply PCB)

  • Page 31: Control Electronics

    3. CONTROL ELECTRONICS Configuration The configuration of the facsimile equipment is shown below. Centronics parallel Control interface (MFC4450/ panel 4550/4550plus/ 6550MC/7550MC/ 7650MC/9000/9500) 5-pin LASER PRINTING Laser unit UNIT 36-pin Relay 5-pin Laser diode 5-pin Polygon motor Modular 26-pin connector for 4-pin PC interface Toner sensor PCB *...

  • Page 32: Main Pcb

    Main PCB The main PCB, which is the nucleus controlling the entire operation of the equipment, con- sists of a FAX engine (ASIC), memories, MODEM, motor drive circuits, sensor detection cir- cuitry, and analog circuits for scanning, printing, and power transmission shifting. Main PCB Centronics Control panel...
  • Page 33 Main PCB Circuit Diagram 1/7 FAX engine (ASIC) which manages the I/Os, memories, drivers and image proces- sor as well as controlling the laser printing unit. 8-pin modular connector for the PC interface (RS-232C), provided on the FAX3550/ 3650/8000P/8200P. III – 14...
  • Page 34 Main PCB Circuit Diagram 2/7 FAX3550/3650/8000P/8200P/MFC4450/4550/6550MC/7550MC/9000/9500: ROM (8-megabit, 512K x 16 bits) which stores programs. MFC4550plus/7650MC: Flash ROM (8-megabit) which stores programs. ROM (8-megabit, 512K x 16 bits) FAX3550/3650/8000P/8200P/MFC4450/4550/4550plus: This ROM is used only on the qualification machines for demonstration. MFC6550MC/7550MC/7650MC/9000/9500: This ROM stores the PCL4 (Driver programs for high-quality print).
  • Page 35 PROMs which store user settings. FAX3550/8000P/MFC4550/6550MC/7550MC/9000/9500: PROM No. Model FAX3550 16K x 1 bit 16K x 1 bit MFC4550 –– 16K x 1 bit MFC6550MC –– 16K x 1 bit FAX8000P/MFC6550MC/ 16K x 1 bit 16K x 1 bit 9000/9500 ––...
  • Page 36 Main PCB Circuit Diagram 3/7 Connector for the document sensor PCB 1-1: Current sink transistor for driving the LED array 1-2: Synchronous clocks for the CCD unit 1-3: Image signal from the CCD unit 1-4: Signal from the document front sensor 1-5: Signal from the document rear sensor Connector for the control panel...
  • Page 37 Main PCB Circuit Diagram 4/7 Operational amplifiers for modem-to-line interface 1-1: RIN, signal from line to modem 1-2: TXO, signal from modem to line Modem Short pin Mounted on the Turkish versions only. III – 18...
  • Page 38 Main PCB Circuit Diagram 5/7 Connector for the relay PCB 1-1: Laser drive signals 1-2: High-voltage power supply control signals 1-3: Eraser lamp ON/OFF signal 1-4: Fan 1 control signal 1-5: Signal input from the paper ejection sensor 1-6: Signal input from the registration sensor 1-7: Signal input from the sheet feeder cover sensor 1-8:...
  • Page 39 Main PCB Circuit Diagram 6/7 Centronics parallel interface circuitry (for the MFC4450/4550/4550plus/6550MC/ 7550MC/7650MC/9000/9500) Connector P15 is compatible with the standard Centronics parallel interface. Backup circuit for the calendar clock of the control panel 2-1: For FAX3550/3650/8000P/8200P/MFC4450/4550/4550plus/9000 2-2: For MFC6550MC/7550MC/7650MC/9500 (This circuit backs up also the im- age and voice data.) III –...
  • Page 40 Main PCB Circuit Diagram 7/7 Connector for the NCU PCB CMLL: NCU relay ON/OFF signal PLS: Dial pulse output TLOF: Off-hook signal which is active Low for the external telephone. Call signal which is active Low. TXD: Line output signal from the MODEM TLSL: Handset microphone signal RL1:...
  • Page 41 Switching devices that are controlled by the ASIC 2-1: Device TEL. If 0, the equipment works as a telephone; if 1, it sends a fac- simile message. 2-2: Device HSPLY. If 0, the equipment works as a telephone; if 1, it plays back a TAD recorded message.

  • Page 42: Relay Pcb

    Relay PCB Relay PCB Circuit Diagram Connector for the main PCB Registration sensor (PC1) circuit Sheet feeder cover sensor (PC2) circuit Cover switch (SW1) Connector for the high-voltage power supply PCB Connector for the toner sensor PCB Connector for the laser diode of the laser unit Switching circuit which feeds 24V power to the polygon motor during the printing pro- cess.

  • Page 43: Ncu Pcb

    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 (U.S.A. versions) Surge absorber Noise filters Line relay (CML relay) Line transformer Circuit related to the line transformer High-impedance transformer circuit Calling signal detector Loop current detector...
  • Page 44 NCU PCB Circuit Diagram (European versions) Surge absorber Noise filters Line relay (CML relay) Line transformer Circuit related to the line transformer High-impedance transformer circuit Calling signal detector Loop current detector Dial pulse generator & loop current detector Telephone circuit Reference voltage generation circuit for the operational amplifier in Pulse shaper Line current detection input circuit...
  • Page 45 • The primary function of the NCU (which is shared by facsimile and telephone units) is to switch a line to the facsimile unit or to the telephone, which is carried out by the line relay. • Since the direct connection of a facsimile equipment to the line is not allowed for protect- ing the line, it is essential to insert a line transformer between the line and the facsimile equipment to insulate them from each other in the direct current band.

  • Page 46: Control Panel Pcb

    Control Panel PCB The control panel PCB and the main PCB communicate with each other by serially transmit- ting commands and data. The control panel unit consists of a gate array, an LCD, and LEDs, which are controlled by the gate array according to commands issued from the FAX engine on the main PCB. The calendar clock is backed up by the backup circuit on the main PCB.

  • Page 47: Power Supply Pcbs

    Power Supply PCBs [ 1 ] Low-voltage power supply PCB The low-voltage power supply uses the switching regulation system to generate DC power (+5V and +24V) from a commercial AC power supply for the driver circuits. The +5V source is fed to the logic, control panel, sensors, CCD unit, etc.; the 24V source is fed to the motors, solenoid, fans, LED array, and the high-voltage power supply PCB.

  • Page 48: 2 ] High-Voltage Power Supply Pcb

    [ 2 ] High-voltage power supply PCB This power supply generates high-voltage power sources from the 24V source fed from the low-voltage power supply for charging, developing, and transferring in the laser printing pro- cess. Fuse Type Resistor OUT1 24VI Current 0.22 Regulator...
  • Page 49 CHAPTER IV. DISASSEMBLY/REASSEMBLY AND LUBRICATION...
  • Page 50 CONTENTS DISASSEMBLY/REASSEMBLY ..............IV-1 Safety Precautions ..................IV-1 Preparation ....................IV-3 How to Access the Object Component ............IV-3 Disassembly Order Flow ................IV-4 Top Cover ....................IV-5 Handset Mount and Hook Switch PCB (for handset-equipped versions) Side Cover IV-5 (for non-handset versions) ............

  • Page 51: Disassembly/Reassembly

    1. DISASSEMBLY/REASSEMBLY Safety Precautions To prevent the creation of secondary problems by mishandling, observe the following pre- cautions during maintenance work. (1) Always unplug the power cord 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 52 Tightening Torque List Location Screw type Q'ty Tightening torque (kgf•cm) Handset mount Taptite, cup B M3x10 Hook switch PCB Taptite, cup B M3x6 Panel rear cover Taptite, cup B M3x8 Inner cover Taptite, cup B 4x12 Taptite, cup B 3x10 Scanner motor Screw, pan (washer) 3x8DB Fixing unit...

  • Page 53: 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), and - the modular jack of an external telephone set if mounted. (Not shown below.) (2) Remove - the wire extension, - the document tray,...

  • Page 54: Disassembly Order Flow

    Disassembly Order Flow IV – 4...

  • Page 55: Top Cover

    Top Cover (1) Open the top cover. (2) Push the arm of the top cover outwards with your thumb to unhook it from the main cover. (3) Turn the top cover upright and slide it to the rear. Top cover Top cover turned upright Main cover...

  • Page 56: Multi-Purpose Sheet Feeder

    Multi-purpose Sheet Feeder (1) Pull either one of the right and left tabs provided on the main cover outwards and slightly lift up the multi-purpose sheet feeder, then release the other end of the sheet feeder also. (2) Take up the sheet feeder. Multi-purpose sheet feeder Tab on the main cover...

  • Page 57: Panel Rear Cover And Control Panel

    Panel Rear Cover and Control Panel (1) Place the control panel ASSY upside down. (2) Remove the document pressure bar, ADF parts, and nip-related parts from the panel rear cover. (3) Remove the two screws from the panel rear cover. (4) While lifting up the front edge of the panel rear cover, unhook it from the 15 pawls "X"...

  • Page 58: Document Feed Roller Assy And Ejection Roller Assy

    Document Feed Roller ASSY and Ejection Roller ASSY (1) Push arm rib "A" to the rear, then shift the document feed roller ASSY to the right and upwards. (2) Push arm rib "B" to the rear, then shift the document ejection roller ASSY to the right and upwards.
  • Page 59 Reassembling Notes • Before putting the inner cover on the main cover, make sure that: The control panel locks (leaf springs) are set in the inner cover as shown on the previ- ous page. The pinch rollers are set with their fringes facing outwards as shown on the previous page.

  • Page 60: Scanner Frame Assy

    Scanner Frame ASSY (1) You can remove the following parts from the top of the scanner frame ASSY without taking out the ASSY from the main cover: • Cover glass. Turn the cover glass up towards you. • Ejection leaf springs. Remove them while slightly pulling up the front edges. •...
  • Page 61 (2) Before taking out the scanner frame ASSY, make sure that the cover glass is removed and the main-sensor harness is disconnected. (3) Slightly lift up the scanner frame ASSY and disconnect the scanner motor harness from the motor, then take out the ASSY. NOTE: Take care not to scratch the mirrors (see the illustration below), CCD unit, or bar lens.

  • Page 62: Insulation Cover

    Reassembling Notes • Check that the mirrors and cover glass are not stained. Wipe them with a soft cloth if necessary. • If you have disassembled the gear train on the right side of the scanner frame ASSY, re- assemble it referring to the illustration below. Separation roller gear Document take-in roller gear...

  • Page 63: Fixing Unit, Fu Lamp, And Paper Ejection Sensor Actuator

    1.10 Fixing Unit, FU Lamp, and Paper Ejection Sensor Actuator (1) Remove the screw "a." (2) Lift up the fixing unit and then disconnect the heater harness (blue and brown wires). Disconnect the heater thermister harness from the eraser lamp board. Fixing unit "a"...
  • Page 64 (7) Remove the screw "d" and loosen the screw "c." (8) Take the lock plate of the FU lamp with your fingers and pull out the FU lamp from the heater roller to the left. CAUTION: Never toutch the FU lamp. If you touch it, clean it throughly with alcohol. "b"...

  • Page 65: Laser Unit

    1.11 Laser Unit (1) Remove the three screws. (2) Slightly lift up the laser unit and disconnect the following three things from the relay PCB: • Laser diode harness (5-pin) • Polygon motor flat cable (5-pin) • Toner sensor harness (4-pin) NOTE: When handling the laser unit, take care not to touch the inside of the unit, glass, or mirror.

  • Page 66: Bottom Plate

    1.12 Bottom Plate (1) Make sure that the drum unit, top cover, and multi-purpose sheet feeder have been re- moved. (2) Turn the machine upside down. (3) Remove the nine screws. (4) Slightly lift up the bottom plate and disconnect the grounding wire. Screws (Taptite, cup S3x6) Screws (Taptite, cup B4x12) Bottom plate...

  • Page 67: Low-Voltage Power Supply Pcb

    1.13 Low-voltage Power Supply PCB The illustration below shows the location of the PCBs. NCU PCB (beneath the main PCB) Main cover (placed upside down) Low-voltage power supply PCB Main PCB Relay PCB Gear drive unit High-voltage power supply PCB Fan 1 (Front) (1) Remove the screw from the low-voltage power supply PCB.

  • Page 68: High-Voltage Power Supply Pcb And Fan 1

    1.14 High-voltage Power Supply PCB and Fan 1 (1) Remove the screw and the insulation film. (2) While pressing down the high-voltage power supply PCB, slightly shift it to the front of the machine. (3) Slightly lift up the high-voltage power supply PCB and disconnect the following four things: •...
  • Page 69 1.15 Main PCB (1) Remove the three screws from the interface plate. (2) Pull out the interface plate to the rear of the machine and take out the main PCB from the shield bracket. (3) Slightly lift up the main PCB and disconnect the following ten harnesses: •...

  • Page 70: Main Pcb

    Reassembling Notes • When reinstalling the main PCB, make sure that the harnesses are routed on the main cover as illustrated in Section 1.23. • For the MFC6550MC/7550MC/7650MC/9500 which has a nickel-hydrogen battery on the main PCB, be sure to remove the battery from the PCB when transporting the PCB. Fail- ure to do so may result in a short circuit, overcurrent flow, and fire.

  • Page 71: Relay Pcb

    1.16 Relay PCB (1) Remove the screw. (2) Slightly lift up the relay PCB and disconnect the following four things: • Toner sensor harness (4-pin), P4 • Laser diode harness (5-pin), P3 • Polygon motor flat cable (5-pin), P2 • Relay–high-voltage flat cable (12-pin), P1 Shield bracket This corner should come directly under the shield bracket.

  • Page 72: Shield Bracket And Ncu Pcb Assy

    1.17 Shield Bracket and NCU PCB ASSY (1) Remove the three screws and take out the shield bracket. Shield bracket NCU PCB ASSY (Rear) Main cover (placed upside down) (2) Remove the screw and take out the NCU PCB ASSY. For the MFC9500, disconnect the microphone harness from the NCU PCB.

  • Page 73: Gear Drive Unit

    1.18 Gear Drive Unit (1) Take out the heater harness (blue and brown wires) from the clamps provided on the gear drive unit. (2) Take out the main motor harness, solenoid harness, and drum grounding harness from the clamp provided on the main cover. Heater harness Drum grounding harness (blue and brown wires)
  • Page 74 (4) To replace the paper feed solenoid, solenoid lever or clutch release lever, remove the three screws and take off the motor bracket. (5) To remove the main motor from the bracket, remove two screws. Main motor Solenoid lever Clutch release lever Solenoid spring Motor bracket Clutch spring...

  • Page 75: Duct Cover, Fan 2, And Speaker

    1.19 Duct Cover, Fan 2, and Speaker (1) Unhook the three latches of the duct cover and lift it up. Take out the fan 2. (2) Unhook the latch and lift up the speaker. Contrast adjuster Duct cover Latch Latches Fan 2 Speaker Latch...

  • Page 76: Sheet Feeder Cover Sensor Actuator, Registration Sensor Actuator, And Cover Sensor Actuator

    1.20 Sheet Feeder Cover Sensor Actuator, Registration Sensor Actuator, and Cover Sensor Actuator (1) Pull up the sheet feeder cover sensor actuator. (2) Pull up the registration sensor actuator. (3) Unhook the spring and take out the cover sensor actuator. Registration sensor actuator (Rear)

  • Page 77: Microphone (Mfc9500 Only

    1.21 Microphone (MFC9500 only) (1) Disconnect the microphone harness from the NCU PCB and remove the NCU PCB ASSY. (Refer to Section 1.17.) (2) Turn the equipment rightside up. (3) Lift up the microphone from the main cover. Boss Microphone Main cover (placed rightside up) (Front) Reassembling Notes...

  • Page 78: Cleaning Of High-Voltage Contacts And Grounding Contacts

    1.22 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 For transfer roller Drum unit For developer For cleaner...

  • Page 79: Harness Routing

    1.23 Harness Routing Main–low- Low-voltage Main-NCU voltage Main motor power supply NCU PCB harness harness harness Main PCB Heater harness Hook switch harness Relay PCB Polygon motor Laser diode Solenoid flat cable harness harness Fan 2 harness Toner sensor harness Main-sensor harness Speaker...

  • Page 80: Lubrication

    2. LUBRICATION Apply Molykote EM-30L to the lubrication points as illustrated below. For points A, apply a bean-sized pinch of grease (12 mm For points B, apply a rice-sized pinch of grease (6 mm [ 1 ] Inner cover Document feed roller ASSY Document ejection roller ASSY Inner cover...
  • Page 81 CHAPTER V. MAINTENANCE MODE...
  • Page 82 CONTENTS ENTRY INTO THE MAINTENANCE MODE ..........LIST OF MAINTENANCE-MODE FUNCTIONS ..........DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS ..PROM Parameter Initialization ............Scanning Compensation Data Initialization ........... Printout of Scanning Compensation Data ..........ADF Performance Test ................Test Pattern 1 ..................V-9 Firmware Switch Setting and Printout ...........

  • Page 83: Entry Into The Maintenance Mode

    1. ENTRY INTO THE MAINTENANCE MODE To make the facsimile equipment enter the maintenance mode, press the Function , * , 2 , 8 , 6 , and 4 keys in this order. Within 2 seconds The equipment beeps for approx. 3 seconds and displays "MAINTENANCE" on the LCD, in- dicating that it is placed in the initial maintenance mode, a mode in which the equipment is ready to accept entry from the keys.

  • Page 84: List Of Maintenance-Mode Functions

    2. LIST OF MAINTENANCE-MODE FUNCTIONS Maintenance-mode Functions Reference Function Subsection Function Code (Page) PROM Parameter Initialization 3.1 (V-4) Scanning Compensation Data Initialization 3.2 (V-5) Printout of Scanning Compensation Data 3.3 (V-6) ADF* Performance Test 3.4 (V-8) Test Pattern 1 3.5 (V-9) Firmware Switch Setting 3.6 (V-10) Printout of Firmware Switch Data...
  • Page 85 IMPORTANT - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Basically, the maintenance-mode functions listed on the previous page should be accessed by service personnel only.

  • Page 86: Detailed Description Of Maintenance-Mode Functions

    3 DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS PROM Parameter Initialization Function The equipment initializes the parameters, user switches, and firmware switches registered in the E PROM, to the initial values. Entering the function code 01 initializes all of the PROM areas, but entering 91 does not initialize some areas, as listed below. Function code Data item Maintenance-mode functions...

  • Page 87: Scanning Compensation Data Initialization

    Scanning Compensation Data Initialization Function The equipment scans the white pressure bar and writes the scanned compensation data onto the E PROM, so said data can be used for compensation of individual CCD properties in the scanning operation. Operating Procedure (1) Press the 0 and 2 keys in this order in the initial maintenance mode.

  • Page 88: Printout Of Scanning Compensation Data

    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. Unless the equipment has carried out any scanning operation, this function cannot print out correct scanning compensation data.
  • Page 89 Scanning Compensation Data List (200 dpi) V – 7...

  • Page 90: Adf Performance Test

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

  • Page 91: Test Pattern 1

    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 maintenance mode. The figure below shows test pattern 1.

  • Page 92: Firmware Switch Setting And Printout

    Firmware Switch Setting and Printout [ A ] Firmware switch setting Function The facsimile equipment incorporates the following firmware switch functions (WSW01 through WSW34) 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 93 Operating Procedure (1) Press the 1 and 0 keys in this order in the initial maintenance mode. The equipment displays the "WSW00" on the LCD and becomes ready to accept a firm- ware switch number. (2) Enter the desired number from the firmware switch numbers (01 through 34). The following appears on the LCD: WSWxx 0 0 0 0 0 0 0 0...

  • Page 94: Wsw01

    Detailed Description for the Firmware Switches WSW01 (Dial pulse setting) Selector Function Setting and Specifications No. 1 Dial pulse generation mode 10-N No. 3 60 ms Break time length in pulse 67 ms dialing 40 ms (for 16 PPS) 64 ms (at 106-ms intervals) No.

  • Page 95: Wsw02

    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 96: Wsw03 Pabx Mode Setting

    WSW03 (PABX* mode setting) Selector Function Setting and Specifications Not used. No. 2 50 ms 210 ms Min. detection time length of 500 ms PABX dial tone, required for 800 ms starting dialing 900 ms 1.5 sec. 2.0 sec. 2.5 sec. Not used.

  • Page 97: Wsw04 Transfer Facility Setting

    Selector 8: "R" key function This selector determines whether or not the 1st dial tone detection function (specified by se- lectors 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 detec- tion function when the PABX and the automatic calling are selected by using the function switch.

  • Page 98: Wsw05 1St Dial Tone And Busy Tone Detection

    WSW05 (1st dial tone and busy tone detection) Selector Function Setting and Specifications No. 1 3.5 sec. WAIT 7.0 sec. WAIT 10.5 sec. WAIT 14.0 sec. WAIT 1st dial tone detection 17.5 sec. WAIT 21.0 sec. WAIT 24.5 sec. WAIT Detection (Without WAIT) Max.
  • Page 99 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.

  • Page 100: Wsw06 Pause Key Setting And 2Nd Dial Tone Detection

    WSW06 (PAUSE key setting and 2nd dial tone detection) Selector Function Setting and Specifications No. 1 : No pause : 3.5 sec. WAIT : 7 sec. WAIT : 10.5 sec. WAIT : 14 sec. WAIT PAUSE key setting and 2nd dial : 17.5 sec.
  • Page 101 Selectors 4 through 6: Detection of international tone Upon detection of the 2nd dial tone for the time length specified by these selectors, the equipment starts dialing. This setting is effective only when the 2nd dial tone detection function is activated by selec- tors 1 through 3 (Setting 1, 1, 0 or 1, 1, 1).

  • Page 102: Wsw07

    WSW07 (Dial tone setting 1) Selector Function Setting and Specifications No. 1 Narrows by 10 Hz Frequency band range Initial value Widens by 10 Hz Line current detection 0: No 1: Yes No. 4 -21 dBm -24 dBm -27 dBm 2nd dial tone detection level -30 dBm (Z = 600 )

  • Page 103: Wsw08

    WSW08 (Dial tone setting 2) Selector Function Setting and Specifications No. 1 50 ms 210 ms 500 ms 1st dial tone detection time 800 ms length 900 ms 1.5 sec. 2.0 sec. 2.5 sec. No. 4 10 sec. Time-out length for 1st and 2nd 20 sec.

  • Page 104: Wsw09

    WSW09 (Protocol definition 1) Selector Function Setting and Specifications Frame length selection 0: 256 octets 1: 64 octets Not used. No. 3 4 times No. of retries 3 times 2 times 1 time T5 timer 0: 300 sec. 1: 60 sec. T1 timer 0: 35 sec.

  • Page 105: Wsw10 Protocol Definition

    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 0: 100 ms 1: 50 ms of the last dial digit to CML ON Time length from CML ON to 0: 2 sec.

  • Page 106: Wsw11 Busy Tone Setting

    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: 700-800/700-800 ms (More than one setting allowed) 1: 110-410/320-550 ms 1: 100-660/100-660 ms NOTE: WSW11 is not applicable in those countries where no busy tone detection is supported,...

  • Page 107: Wsw12 Signal Detection Condition Setting

    WSW12 (Signal detection condition setting) Selector Function Setting and Specifications No. 1 300 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 108: Wsw13 Modem Setting

    WSW13 (Modem setting) Selector Function Setting and Specifications No. 1 0 km 1.8 km Cable equalizer 3.6 km 5.6 km No. 3 : -43 dBm Reception level (Z = 600 ) : -47 dBm : -49 dBm : -51 dBm 0: 0 dB 1: 8 dB 0: 0 dB...

  • Page 109: Wsw14 Auto Ans Facility Setting

    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 70 Hz No.

  • Page 110: Wsw15 Redial Facility Setting

    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 time No. of redialings 2 times 3 times : 15 times Not used.

  • Page 111: Wsw16

    WSW16 (Function setting 1) Selector Function Setting and Specifications Not used. CCITT superfine recommendation 0: OFF 1: ON 0: Only from the 1: From all connected telephones Remote reception external connected telephone Not used. Exclusive line mode 0: OFF 1: ON Max.

  • Page 112: Wsw17

    WSW17 (Function setting 2) Selector Setting and Specifications Function No. 1 No alarm Always valid Off-hook alarm Valid except when ‘call reservation’ is selected. 0: ON 1: OFF Power failure report output Calender clock/prompt 0: NO 1: YES alternate display 0: U.S.A.

  • Page 113: Wsw18

    WSW18 (Function setting 3) Selector Function Setting and Specifications Not used. No. 2 40 sec. Detection enabled time for CNG 0 sec. (No detection) and no tone 5 sec. 80 sec. Not used. Registration of station ID 0: Permitted 1: Prohibited No.

  • Page 114: Wsw19 Transmission Speed Setting

    WSW19 (Transmission speed setting) Selector Function Setting and Specifications No. 1 No. 4 First transmission speed choice 2,400 bps for fallback 4,800 bps 7,200 bps 9,600 bps 12,000 bps Last transmission speed choice for fallback 14,400 bps Not used. 0: Permitted 1: Prohibited V.17 mode Selectors 1 through 6:...

  • Page 115: Wsw20 Overseas Communications Mode Setting

    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 Min. time length from reception 100 ms of CFR to start of transmission of 200 ms...

  • Page 116: Wsw21

    WSW21 (TAD setting 1) Selector Function Setting and Specifications No. 1 0 : No detection 1 : 1 sec. 0 : 2 sec. 1 : 3 sec. Max. waiting time for voice signal 0 : 8 sec. 1 : 31 sec. No.

  • Page 117: Wsw23

    WSW23 (Communications setting 2) Selector Setting and Specifications Function 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 trans- mission of RTN Issue of RTN at the occurrence 0: YES...

  • Page 118: Wsw24

    Selector 7: Resolution level for reception This selector determines whether the resolution should be limited at the start of reception in the sleep mode. Selector 8: Limitation of attenuation level Setting this selector to "0" limits the transmitting level of the modem to 10 dB. This setting has priority over the settings selected by WSW02 (selectors 5 through 8) and WSW13 (selectors 5 through 8).

  • Page 119: Wsw25

    WSW25 (TAD setting 3) Selector Setting and Specifications Function Not used. No. 5 2 sec. 4 sec. 6 sec. Pause between paging number 8 sec. and PIN 10 sec. 12 sec. 14 sec. 16 sec. Automatic shift to facsimile message receive mode in ICM 0: YES 1: NO recording mode...

  • Page 120: Wsw26

    WSW26 (Function setting 4) Selector Function Setting and Specifications Not used. No. 4 No. of CNG cycles to be detected No detection (OFF) (when the line is connected via the external telephone except in the external TAD mode) No. of CNG cycles to be detected No.

  • Page 121: Wsw27

    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 Automatic playback of OGM at 0: OFF 1: ON the start time of OGM ON mode Detection of distinctive ringing 0: OFF 1: ON...

  • Page 122: Wsw28

    WSW28 (Function setting 6) Selector Function Setting and Specifications No. 1 0 dB +1 dB +2 dB Transmission level of DTMF +3 dB high-band frequency signal 0 dB –1 dB –2 dB –3 dB No. 4 0 dB +1 dB +2 dB Transmission level of DTMF +3 dB...

  • Page 123: Wsw29

    WSW29 (Function setting 7) Selector Setting and Specifications Function Not used. Beep at the time of full activity 0: No 1: Yes report data Selector 8: Beep at the time of full activity report data (for the European versions only) If this selector is set to "1,"...

  • Page 124: Wsw30

    WSW30 (Function setting 8) Selector Function Setting and Specifications No. 1 -38.0 dBm -39.5 dBm -41.0 dBm Detection level of dial tone or -42.5 dBm busy tone for the built-in TAD operation -44.0 dBm -45.5 dBm -47.0 dBm -48.5 dBm Not used.

  • Page 125: Wsw31

    WSW31 (Function setting 9) Selector Function Setting and Specifications Not used. Default reduction rate for failure of automatic reduction during 0: 100% 1: 50% recording Not used. Minimum short-OFF duration in 0: 130 ms 1: 90 ms distinctive ringing Not used. Selector 2: Default reduction rate for failure of automatic reduction during recording This selector sets the default reduction rate to be applied if the automatic reduction function...

  • Page 126: Wsw33

    WSW33 (Function setting 11) Selector Function Setting and Specifications No. 1 -42.5 dBm -44.0 dBm Detection threshold level for -45.5 dBm voice signals inputted via the -47.0 dBm network in the built-in TAD -48.5 dBm operation -50.0 dBm -51.5 dBm -53.0 dBm No.

  • Page 127: Wsw34

    WSW34 (Function setting 12) Selector Function Setting and Specifications No. 1 0 second ICM recording time to be erased 1 second preceding the tone detection 2 seconds when the equipment automatically 3 seconds disconnects the line because no 4 seconds voice signal has been received 5 seconds 6 seconds...
  • Page 128 [ 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 maintenance mode. The "PRINTING" will appear on the LCD. (2) The equipment prints out the configuration list as shown in the figure below.

  • Page 129: Operational Check Of Control Panel Pcb

    Operational Check of Control Panel PCB Function This function checks the control panel PCB for normal operation. Operating Procedure (1) Press the 1 and 3 keys in this order in the initial maintenance mode. The "00 " will appear on the LCD. (2) Press the keys and buttons in the order designated in the illustration shown below.

  • Page 130: Sensor Operational Check

    MFC6550MC/7550MC/7650MC/9500 MFC 7550MC Fine Voice status Photo status status S.Fine F/ T PRINTER COPIER SCANNER PC FAX MESSAGE CENTER Super Function Clear Tel-index Resolution Mode Coverpage Help Q.Scan Speaker A BC DE F Hook On/Off Record Erase Play Photo Line GH I J KL Hold...

  • Page 131: Ccd Scanner Area Setting

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

  • Page 132: Output Of Transmission Log To The Telephone Line

    3.11 Output of Transmission Log to the Telephone Line Function This function outputs the transmission log (that the equipment has stored about the latest transmission) to the telephone line. It allows the service personnel to receive the transmis- sion log of the user’s equipment at a remote location and use it for analyzing problems aris- ing in the user’s equipment.
  • Page 133 CHAPTER VI. ERROR INDICATION AND TROUBLESHOOTING...
  • Page 134 CONTENTS ERROR INDICATION ..................VI-1 1.1 Equipment Errors ................... VI-1 [ 1 ] Error messages on the LCD ............VI-1 [ 2 ] Error codes shown in the “MACHINE ERROR xx” message ..VI-3 1.2 Communications Errors ................VI-5 TROUBLESHOOTING ................... VI-12 2.1 Introduction .....................

  • Page 135: Error Indication

    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 re- port and the communications list.
  • Page 136 Messages on the LCD Probable Cause DOCUMENT JAM Document loading error (1) The document rear sensor detects no leading edge of a document within 10 seconds from the start of document loading operation. (The document rear sensor stays OFF even after the document has been fed when the document front sensor was ON.) (2) The loaded document is too short.

  • Page 137: 2 ] Error Codes Shown In The "Machine Error Xx" Message

    [ 2 ] Error codes shown in the “MACHINE ERROR xx” message Error Code Error factor (Hex.) Laser scanner motor does not lock. Cannot detect Beam Detect signal. No toner cartridge loaded. Toner empty. In-house temperature error. Fixing heater harness disconnected or broken. Heater thermister shortcircuit.
  • Page 138 Error Code Error factor (Hex.) ( BB Scanning error: The right-hand black reference line which is marked on the document pressure bar for scanning width setting is not detected.) ( BC Scanning error: Reduction miss) ( BD Scanning error: Enlargement miss) The MODEM setup bit sticks to High.

  • Page 139: Communications Errors

    Communications Errors If a communications error occurs, the facsimile equipment (1) emits an audible alarm (intermittent beeping) for approximately 4 seconds, (2) displays the corresponding error message, and (3) prints out the transmission verification report if the equipment is in sending operation. VI –...
  • Page 140 Definition of Error Codes on the Communications List (1) 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 or called. No response from the remote station in sending.
  • Page 141 (3) 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 confi- dential mail box function.
  • Page 142 (4) 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 143 (6) 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 ID. Relay broadcasting ID not coincident. Entered retrieval ID uncoincident with that of the mail box (7) DCN reception Code 1...
  • Page 144 (9) 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 145 (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 any command from the RS-232C interface in burn-in operation. (13) Equipment error Code 1 Code 2 Causes...

  • Page 146: Troubleshooting

    2. TROUBLESHOOTING Introduction This section gives the service personnel some of the troubleshooting procedures to be fol- lowed if an error or malfunction occurs with the facsimile equipment. It is impossible to an- ticipate all of the possible problems which may occur in future and determine the trouble- shooting procedures, so this section covers some sample problems.

  • Page 147: Troubleshooting Procedures

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

  • Page 148: 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 • Sensors by using the maintenance-mode function No. 32. (Refer to Chapter V, Section 3.8.) COPY”...

  • Page 149: 5 ] Print-Image Related

    [ 5 ] Print-image related If the received or sent image has any problem, first make a copy with the facsimile equip- ment. If the copied image is normal, the problem may be due to the remote terminal; if it is abnor- mal, proceed to the following checks: Trouble Action to be taken...
  • Page 150 Trouble Action to be taken (3) Light At the scanner Check the following components: - Scanner unit - Main PCB At the printer side • Check the setting position of the print density dial. • Replace the toner cartridge with a new one and print 4 to 5 pages.
  • Page 151 Trouble Action to be taken (5) Black and blurred vertical At the scanner stripes Check the following components: - Scanner unit - Mirrors on the scanner unit for stains At the printer side • Clean the paper path which may be contaminated with toner.
  • Page 152 Trouble Action to be taken (9) Faulty image registration At the printer side (Leading edge of image starts • Instruct the user not to load paper exceeding the limit too late on paper) mark on the multi-purpose sheet feeder. • Instruct the user to use the recommended types of paper. •...
  • Page 153 Trouble Action to be taken (11) Blurred at either side At the printer side • Shake the toner cartridge. If the problem persists, Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o replace it.
  • Page 154 Location of High-voltage Contacts and Grounding Contacts Grounding Contacts High-voltage Contacts For transfer roller Drum unit For cleaner For developer roller roller For grid For corona wire Gear drive unit Drum grounding board High-voltage power supply VI – 20...
  • Page 155 FAX3550/3650/8000P/8200P MFC4450/4550/4550plus/6550MC/7550MC/7650MC MFC9000/9500 APPENDICES Circuit Diagrams A. Main PCB B. Relay PCB C. Network Control Unit (NCU) PCB D. Control Panel PCB E. Power Supply PCB Low-voltage power supply High-voltage power supply...
  • Page 156 R I N G O T A D H H O O K F A N 7 4 C R I N G S E N 5 7 4 B 5 5 C S E N 6 P A 3 5 1 C T E L M S I L...
  • Page 157 + 5 V S 0 V + 5 B S 0 V + 5 B S 0 V C 1 0 9 C 1 7 C 1 0 7 R 1 7 2 C C 1 0 4 C C 1 0 4 C C 1 0 4 R A S 0 1 4 1 5...
  • Page 158 + 2 4 V R 5 V + 5 V S E N S B L M 1 1 A 2 0 R 6 0 1 0 0 R 7 4 R 5 7 3 0 0 R 1 9 9 L E D 1 4 C C 1 3 9...
  • Page 159 M 5 V S O V + 5 V R 7 1 C 1 3 5 4 . 7 K 1 0 0 F / 1 0 V R 6 2 + 5 V A R E F + 5 V C 6 5 C C 1 0 4 C 8 6...
  • Page 160 P 1 3 C H U K E I + 2 4 V S 0 V + 5 V C 3 4 R 1 9 2 C C 1 0 3 4 . 7 K L O C K R 0 V 1 5 A L V P S U M G 5 N...
  • Page 161 M F C 4 5 5 0 , 6 5 5 0 , 7 5 5 0 + 5 V R A 4 R A 6 R A 8 1 . 0 K x 4 2 . 2 K x 4 2 .
  • Page 162 + 2 4 V N C U 1 + 5 V M 5 V M 5 V + 2 4 V Q 1 8 D T C 1 1 4 Y K C M L L C M L H 1 1 B # 1 3 # 1 4...
  • Page 163 MAIN 8/8 FAX3550/3650/8000P/8200P MFC4550/6550MC/7550MC MFC9000/9500...
  • Page 164 A S I C M F C 2 R I N G O H O O K F A N R I N G S E N 5 7 4 C 5 5 C S E N 6 P A 3 5 1 C T E L S P O N...
  • Page 165 + 5 V S 0 V + 5 V S 0 V R 1 7 2 C 1 7 C 1 0 7 C C 1 0 4 C C 1 0 4 R A S 0 1 4 A A B U S V C C D B U S...
  • Page 166 + 2 4 V R 5 V + 5 V S E N S B L M 1 1 A 2 0 R 6 0 1 0 0 R 7 4 R 5 7 3 0 0 R 1 9 9 L E D 1 4 C C 1 3 9...
  • Page 167 S 0 V + 5 V R 6 2 M 0 V M 5 V 1 6 V / 1 0 C C 1 0 4 x 2 S 0 V D G N D D V D D C 9 9 C C 1 0 2 D G N D D V D D...
  • Page 168 P 1 3 C H U K E I + 2 4 V S 0 V + 5 V C 3 4 R 1 9 2 C C 1 0 3 4 . 7 K L O C K R 0 V 1 5 A L V P S U M G 5 N...
  • Page 169 R A 4 R A 6 R A 8 1 . 0 K x 4 2 . 2 K x 4 2 . 2 K x 4 + 5 V P 1 5 5 7 L E 4 0 3 6 0 1 5 0 - A C K 1 4 C...
  • Page 170 + 2 4 V N C U 1 + 5 V + 2 4 V M 5 V # 1 4 C 9 8 C 1 3 3 Q 1 8 K I 3 2 4 7 4 H C 4 0 5 3 C C 5 0 C 1 0 4 C C 1 0 4 D T C 1 1 4 Y K...
  • Page 171 R I N G O T A D H H O O K F A N 7 4 C R I N G S E N 5 7 4 B 5 5 C S E N 6 P A 3 5 1 C T E L M S I L...
  • Page 172 + 5 B S 0 V + 5 V S 0 V C 1 0 7 C C 1 0 4 C C 1 0 4 R 1 7 2 V C C V C C 2 0 0 A B U S V C C D B U S R A S 0...
  • Page 173 + 2 4 V R 5 V + 5 V S E N S B L M 1 1 A 2 0 R 6 0 1 0 0 R 7 4 R 5 7 3 0 0 R 1 9 9 L E D 1 4 C C 1 3 9...
  • Page 174 M 5 V S O V + 5 V R 7 1 C 1 3 5 4 . 7 K 1 0 0 F / 6 . 3 V R 6 2 + 5 V A R E F + 5 V C 6 5 C 8 6 C C 1 0 4...
  • Page 175 P 1 3 C H U K E I + 2 4 V S 0 V + 5 V C 3 4 R 1 9 2 C C 1 0 3 4 . 7 K L O C K R 0 V 1 5 A L V P S U M G 5 N...
  • Page 176 + 5 V R A 4 R A 6 R A 8 1 . 0 K x 4 2 . 2 K x 4 2 . 2 K x 4 + 5 V P 1 5 M A 7 0 0 5 7 L E 4 0 3 6 0 1 5 0 - A C K...
  • Page 177 + 2 4 V N C U 1 + 5 V M 5 V M 5 V + 2 4 V Q 1 8 D T C 1 1 4 Y K C M L L C M L H 1 1 B # 1 3 # 1 4...
  • Page 178 M F C 4 5 5 0 P L U S M F C 4 5 5 0 P L U S M F C 7 6 5 0 S Y M B O L N O T M O U N T E D 1 P a g e R 3 4 N O T M O U N T E D...
  • Page 179 CONNECTOR B 5 B - P H + 5 V L A S E R CONNECTOR M A I N + 5 V 1 2 8 A - 0 2 6 S 2 B G N D G N D S C D T V D O R E I K I...
  • Page 180 + 2 6 V FPC CABLE 8P C R 1 M Z F - 2 4 H G C M L O U A Z - S S - 1 2 4 D R A 3 5 1 X 2 N C U S L S 0 V R L 1...
  • Page 181 J P 2 9 ( C ) J P 8 ( 5 ) A - O U T R D P S J P 1 1 ( 1 0 ) J P 2 7 ( C ) T E L O F F 1 L I N E J P 2 2 ( 1 0 ) J P 2 0...
  • Page 182 J P 8 J P 8 ( 5 ) ( 5 ) A - O U T A - O U T R D P S R D P S J P 1 1 J P 1 1 ( 1 0 ) ( 1 0 ) J P 2 7 ( C ) J P 2 7 ( C )
  • Page 183 J P 2 9 ( C ) 4 . 3 V J P 8 ( 5 ) A - O U T R D P S J P 1 1 ( 1 0 ) J P 2 7 ( C ) T E L O F F 1 S P 7 L I N E...
  • Page 184 J P 8 ( 5 ) A - O U T R D P S J P 1 1 ( 1 0 ) J P 2 7 ( C ) T E L O F F 1 L I N E J P 2 2 ( 1 0 ) J P 2 0 ( 5 )
  • Page 185 CONTROL PANEL 1/2...
  • Page 186 M F C 2 P A N E L K E Y M A T R I X R E F E R E N C E T A B L E K E Y P P F 3 5 5 0 M F C K E Y C O D E...
  • Page 187 POWER SUPPLY (120 V) Low-voltage power supply...
  • Page 188 POWER SUPPLY (200-240 V) Low-voltage power supply (European versions)
  • Page 189 POWER SUPPLY (200-240 V) Low-voltage power supply (Asian versions)
  • Page 190 POWER SUPPLY High-voltage power supply...
  • Page 191 Sept. '98 5X52012 Printed in Japan...

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