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Brother Color Laser Printer

SERVICE MANUAL

MODEL: HL-2600CN
Read this manual thoroughly before maintenance work.
Keep this manual in a convenient place for quick and easy reference at all times.
October 2001
SM-PRN023

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Table of Contents

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   Summary of Contents for Brother HL-2600CN

  • Page 1: Service Manual

    Brother Color Laser Printer SERVICE MANUAL MODEL: HL-2600CN Read this manual thoroughly before maintenance work. Keep this manual in a convenient place for quick and easy reference at all times. October 2001 SM-PRN023...
  • Page 2 Specifications are subject to change without notice. Trademarks: The brother logo is a registered trademark of Brother Industries, Ltd. Apple, the Apple Logo, and Macintosh are trademarks, registered in the United States and other countries, and True Type is a trademark of Apple computer, Inc.
  • Page 3 PREFACE This service manual contains basic information required for after-sales service of the color laser printer (here-in-after referred to as "this machine" or "the printer"). This information is vital to the service technician to maintain the high printing quality and performance of the printer. This service manual covers the HL-2600CN color laser printer.
  • Page 4: Table Of Contents

    CONTENTS CHAPTER I PRODUCT OUTLINE ............I 1. FEATURES ..................... I-1 2. PARTS NAMES & FUNCTIONS ..............I-4 3. INTERNAL STRUCTURE................I-6 4. DESCRIPTION OF CONTROL PANEL............I-7 4.1 Video Controller Mode ......................I-7 4.2 Engine Controller Mode ......................I-7 CHAPTER II SPECIFICATIONS ............II-1 1.
  • Page 5 2. STRUCTURE OF THE CONTROL SYSTEM ..........IV-27 2.1 Basic Structure......................... IV-27 2.2 Control System ........................ IV-34 2.3 Main PCB (Video Controller PCB) ................... IV-42 2.4 Power Supply Unit ......................IV-56 2.5 High Voltage Power Supply Unit..................IV-60 2.6 Wiring Diagram ........................ IV-63 1.
  • Page 6 CHAPTER VII DISASSEMBLY ............ VII-1 1. BEFORE STARTING DISASSEMBLY ............VII-1 1.1 Precautions ........................VII-1 1.2 Preparation of Disassembly ....................VII-1 2. PARTS NAME ....................VII-3 2.1 Cover ..........................VII-3 2.2 Circuit Boards (PCBs)....................... VII-4 2.3 Motor Units........................VII-4 2.4 Clutches and Solenoids ....................VII-5 2.5 Sensors..........................
  • Page 7 REGULATIONS LASER SAFETY (FOR 110-120 V MODEL ONLY) This printer is certified as a Class I laser product under the U.S. 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.
  • Page 8 IEC 60825 SPECIFICATION (FOR 220-240 V MODEL ONLY) This printer is a Class 1 laser product as defined in IEC 60825 specifications. The label shown below is attached in countries where required. CLASS 1LASER PRODUCT APPAREIL Å LASER DE CLASSE 1 LASER KLASSE 1 PRODUKT This printer has a Class 3B Laser Diode which emits invisible laser radiation in the Scanner Unit.
  • Page 9: Safety Instructions

    SAFETY INSTRUCTIONS SAFETY PRINCIPLE 1) Before starting any operations, read this manual thoroughly. Especially read the safety instructions in this section carefully and ensure that you understand the contents. 2) Perform all the operations by following the procedures described in this manual. Follow all the cautions and warnings set out in the procedures and on safety labels affixed to the machine.
  • Page 10 WARNING HAZARDOUS VOLTAGE May cause serious injuries or fatal accidents. Voltage is now applied from the power supply of printer. There is a danger of electrical shock if you touch the active area inside the printer. Be sure to turn the power supply switch OFF and pull the plug out from the power outlet before starting maintenance work on the printer.
  • Page 11 CAUTION HAZARDOUS POWDER Toner is a fine powder which can cause a powder explosion if disposed of into a fire. Under no circumstances dispose of toner into a fire. CAUTION HAZARDOUS POWDER Toner is a fine powder which may cause irritation to the eyes and respiratory organs if inhaled.
  • Page 12 CAUTION Do not lean against or apply any excessive force to the paper cassette, open cover of Duplex unit. Otherwise it may cause the product to decline or fall down and result in the injuries.
  • Page 13: Laser Caution Label

    <Label Location> 1. Hot Caution Label 170 C/338 F 2. Laser Caution Label 7 8 0 n m - 8 0 0 n m DANGER- INVISIBLE LASER RADIATION WHEN OPEN. AVOID DIRECT EXPOSURE TO BEAM. VORSICHT- UNSICHTBARE LASERSTRAHLUNG, WENN ABDECKUNG GEÖFFNET UND SICHERHEITSVERRIEGELUNG ÜBERBRÜCKT.
  • Page 14 3. Rating Label (For US) (For Europe) (Jam label) viii...
  • Page 15: Shipment Of The Printer

    SHIPMENT OF THE PRINTER If for any reason you must ship the printer, carefully package the printer to avoid any damage during transit. It is recommended that you save and use the original packaging. The printer should also be adequately insured with the carrier. CAUTION N When shipping the printer, remove the toner cartridges, the OPC belt cartridge and the waste toner pack from the printer to prevent toner spill...
  • Page 18: Chapter I Product Outline

    CHAPTER I PRODUCT OUTLINE FEATURES This printer has the following features: 2400 x 600 dpi Class Resolution The printer prints pages with a resolution of 600 dots per inch (dpi) as default. It also provides higher quality printout which is the equivalent of 2400 x 600 dpi resolution when using HRC or CAPT.
  • Page 19 It is fully compatible with the industry-standard bi-directional parallel interface. The Brother network board (NC-4100h) is factory installed in the HL- 2600CN, which enables you to use this printer in the TCP/IP, IPS/SPX, Apple Talk, DLC/LLC, Banyan VINES, DEC LAT and NetBEUI environments.
  • Page 20 Various Fonts The printer has 66 scalable and 12 bitmapped fonts. The fonts that can be used will vary according to the selected emulation mode. In PCL mode, you can also print the 13 kinds of bar codes listed below. In BR-Script mode, the printer has 165 scalable fonts. <...
  • Page 21: Parts Names & Functions

    PARTS NAMES & FUNCTIONS <Front View> 10. Paper stopper A 2. Control Panel 1. Top Cover ASSY 2 11. Paper stopper B 5. Power Button 3. Front Cover 2 Media Cassette Fig.1-1 <Rear View> 9. Paper Exit Unit Cover 2 8.
  • Page 22 Part Name Outline of Functions Top Cover ASSY 2 To act as an upper enclosure and also as a paper tray for printed paper. Control Panel To display the status of printer operation. Front Cover 2 To act as a front enclosure, opened when replacing a toner cartridge or waste toner pack.
  • Page 23: Internal Structure

    INTERNAL STRUCTURE <Cross Sectional View > 4.Fusing Unit 3.Drum Cleaner 2 2.OPC Belt Cartridge 1.Toner Cartridge (K, Y, M, C) 5.Transfer Unit 2 7.Paper Discharger 11.Scanner Unit 8.Transfer Roller 2 6.Transfer Drum 2 9.Media Cassette 12.Registration Roller 2 10.Paper Pick-up Roller Fig.1-3 Components Name Outline of Functions...
  • Page 24: Description Of Control Panel

    DESCRIPTION OF CONTROL PANEL The printer control panel provides control of the printer including test printing, maintenance operations performed by the video controller and also the ones which are performed by the engine controller. The Video Controller Mode and the Engine Controller Mode have some common functions.
  • Page 25 Power Ready Data Alarm Cancel Secure Print Menu Reprint Back Fig.1-4 LED / Button Name LCD: 16 character by 2 lines Power LED Ready LED Data LED Go button Job Cancel button Alarm LED Secure Print button - button + button Reprint button Back button Set button...
  • Page 26: Chapter Ii Specifications

    CHAPTER II SPECIFICATIONS...
  • Page 27 2.5.1 Printable Media & Cassette Capacity ................II-5 2.5.2 Printed Output........................II-6 2.5.3 Recommended Paper Specifications................II-6 2.5.4 Effective Printing Area ....................II-6 2.5.5 Paper Feed Jam Rate....................II-8...
  • Page 28: Rating

    CHAPTER II SPECIFICATIONS RATING WARNING Use the power supply cable supplied with the printer, or a similar cable complying with the following specification (3-wire power cable with ground). Use of an “out of specification” cable may result in an electric shock. Destination Voltage (V) Frequency (Hz)
  • Page 29: General Specifications

    GENERAL SPECIFICATIONS 2.1. Printing Print method: Electrophotography by semiconductor laser beam scanning Resolution: 600 x 600 dots per inch (Fine) The resolution can be enhanced to 2400 dpi class by using the HRC(High Resolution Control) and CAPT (Color Advanced Photoscale Technology) features.
  • Page 30: Functions

    2.2. Functions CPU: Toshiba TMPR 4955AF-266 (TX4955 266MHz) Emulation: Automatic emulation selection HP Color Printer (PCL5C) including HP LaserJet 4+ (PCL5e) and HP LaserJet 5 (PCL6 monochrome) BR-Script 3 (Adobe PostScript 3 compatible) HP-GL EPSON FX-850 IBM Proprinter XL Interface: Bi-directional parallel Universal Serial Bus (USB) Ethernet 10/100 Base-TX...
  • Page 31: Network

    2.4. Network Type / Speed: Ethernet 10/100BaseTX Printer server (NC-4100h) Auto speed detection Protocols: TCP/IP (DHCP, BOOTP, RARP, DHCP, NetBIOS over IP LPR/LPD, Port9100, Custom Port, POP3/SMTP SMB Print TELNET, SNMP, HTTP, TFTP), EtherTalk, IPX/SPX, DEC LAT, Banyan VINES, NetBEUI, DLC/LLC Management: Web Based Management BRAdmin Professional Windows®...
  • Page 32: Paper Specification

    2.5. Paper Specification 2.5.1 Printable Media & Cassette Capacity The standard media cassette (upper cassette) is supplied with the printer. The optional lower tray unit and the optional Legal cassette can also be installed. 1) Printable Media: Plain paper / Transparency / Thick Stock / Label / Envelope 2) Printable size: (Refer to the list below.) 3) Feedable paper weight: 64 (18lb.) to 163 (43lb.) g/m...
  • Page 33 2.5.2 Printed Output 250 sheets of 75g/m (20lb) paper / plain paper can be stacked in the output tray. Face-down print delivery Note: Face down: Delivers the printed side of the paper downwards Environment: 17.5 27.0 C, 50 70%RH 2.5.3 Recommended Paper Specifications Item Description...
  • Page 34 Table 2-1: Effective Printing Areas Size 210.0mm 297.0mm 203.2mm 288.5mm 3.4mm 4.23mm 8.27” 11.69” 8.0” 11.36” 0.13” 0.17” (2,480 dots) (3,507 dots) (2,400 dots) (3,407 dots) (40 dots) (50 dots) 215.9mm 279.4mm 207.44mm 271.0mm 4.23mm Ç Letter 8.5” 11.0” 8.16” 10.67”...
  • Page 35 Print guarantee area <Plain paper> Paper:5mm Other:10mm Non printable area Print guarantee area Non guarantee area Paper:4mm Other:10mm <Envelope> Non printable area Non guarantee area 42mm Print guarantee area 16mm COM10:68mm COM10:68mm DL:40mm DL:40mm 2.5.5 Paper Feed Jam Rate Less than 1 misfeed per 2000 pages under normal environmental conditions. Less than 1 misfeed per 1000 pages outside the normal environmental conditions.
  • Page 36: Environmental Condition

    ENVIRONMENTAL CONDITION Ambient Temperature / Humidity / Altitude Under Operational conditions: 10.0 32.5 C, 20 80%RH (See the figure below.) Zone A Recommended Condition; 17.5 70%RH Zone B Operation Area other than Zone A. 17.5 20 27 30 32.5 40 Ambient Temperature ( ) C Under Non Operational conditions: 5.0 35.0 C, 10...
  • Page 37 Storage and Transportation Environment of Printer The following defines the storage and transportation environment of printers that have been packed according to Brother specification. However, this section does not cover the OPC belt cartridge and toner cartridges. Normal 35 C (32 F...
  • Page 39  (QYLURQPHQWDO &RQGLWLRQV ,,,  %DVLF /D\RXW RI 3ULQWHU 6HWXS /RFDWLRQ  ,,,  8QSDFNLQJ WKH 3ULQWHU  ,,,  8QSDFN WKH 6WDUWHU .LW  ,,,  ,QVWDOO WKH )XVHU &OHDQHU DQG 2LO %RWWOH ,,,  ,QVWDOO WKH 23& %HOW &DUWULGJH  ,,,  ,QVWDOO WKH 7RQHU &DUWULGJH WR WKH 3ULQWHU  ,,,  7HVW 3ULQW  ,,,...
  • Page 40: Chapter Iii Installation

    CHAPTER III INSTALLATION CONDITIONS REQUIRED FOR INSTALLATION Any Laser beam printer is likely to be influenced by the environment of the set-up location. If the printer is set-up in an inappropriate location, the printer may not perform as expected. Therefore, the following factors should be taken into consideration before deciding where to set-up the printer.
  • Page 41: Unpacking

    UNPACKING WARNING The package containing a printer weighs approximately 45kg, so it is too heavy for one person to carry. It needs two adults to move the printer. Since the printer is a precision machine, make sure that it is carried slowly with care so that no impact occurs to the printer while moving it.
  • Page 42 Starter Kit Packing (U) Toner Partition Packing Polyethylene Bag (T) Outer Box Silica Gel (ST) Polyethylene Bag (T) Polyethylene Polyethylene Bag (T) #23 Polyethylene Bag (CL) Bag (ST) Starter Kit P.P Band (w:15.5mm) Outer Box Tape (w:75mm) Packing (L) F23 Polyethylene Bag (Oil) Engine Top Cushion Silica Gel (ST)
  • Page 43: Unpack The Starter Kit

    Unpack the Starter Kit <Unpacking Procedure> Open the polyethylene bag and slide off the cardboard sleeve covering the starter kit. Confirm all of the following parts are inside the starter kit packing box. Kit Name Appearance Quantity Y(Yellow) M(Magenta) Toner Cartridge (Y,M,C,K) C(Cyan) K(Black) OPC Belt Cartridge...
  • Page 44: Installation Work

    INSTALLATION WORK Install the unit parts of the starter kit into the printer according to the following procedures: Install the Fuser Cleaner and Oil Bottle 1) Open the paper exit cover. Pressure has been released by the Paper exit cover fusing release lever between the fuser Fusing roller and back-up roller while the...
  • Page 45: Install The Opc Belt Cartridge

    Install the OPC Belt Cartridge Do not directly touch the OPC belt surface with bare hands or gloves. If the OPC belt is exposed for more than two minutes under the light of 800 lux, the belt may be damaged. 1) Open the front cover and the paper exit unit cover 2 by releasing the latches.
  • Page 46 3) Pull and remove the tension release Tension pins on both sides (left & right) of the Protective sheet release pin OPC belt cartridge. 4) Remove the protective sheet from the new OPC belt cartridge. Tension OPC belt cartridge release pin Fig.3-8 5) Install the new OPC belt cartridge into the printer, along the guide of belt...
  • Page 47 Install the Toner Cartridges into the Printer Refrain from holding a toner cartridge vertically, otherwise, it may adversely affect the print quality. Do not hold the toner cartridge vertically(neither long nor short edge), otherwise , it adversely affect the print quality. 1) Open the front cover.
  • Page 48: Test Print

    Test Print Make sure the printer power button is off. Do not connect the interface cable. Fig.3-15 Connect the AC power cord to the printer, and then plug it into the AC outlet. Fig.3-16 Turn on the power button. Fig.3-17 III-9...
  • Page 49 After the printer warms, the READY message will appear. Unfold the tray extension flap Control panel NETWORK READY HL-2600CN Power Ready Data Alarm Cancel Secure Print Reprint Back Fig.3-18 Press the Go button. The printer will print a test page. Check that the test page is printed correctly.
  • Page 50: Chapter Iv Structure Of System Components

    CHAPTER IV STRUCTURE OF SYSTEM COMPONENTS...
  • Page 51 CHAPTER IV STRUCTURE OF SYSTEM COMPONENTS ...IV-1 1. BASIC STRUCTURE.................. 1.1 Print System and Transfer System ................. IV-6 1.1.1 Structure of the Printer ..................... IV-7 1.1.2 Basic Structure of the Printing System..............IV-8 1.1.3 Details of Each Process ..................IV-10 1.2 Scanning System......................
  • Page 52: Basic Structure

    CHAPTER IV STRUCTURE OF SYSTEM COMPONENTS BASIC STRUCTURE <Mechanical & Electrical Structures> This laser beam color printer (hereinafter called “Printer”) consists of five mechanical systems; Print, Transfer, Scanning, Paper Transport and Control System. The printer produces color printing through the interactive operations of these five systems as shown in Fig.4-1.
  • Page 53 Main Motor Develope Motor I/F Controller Paper Exit Paper Exit Unit Drum Cleaner Unit MCTL Fusing Unit I/F Control Drum Cleaning OPC Belt Sequence Control Operation Development Laser Control Transfer Drum Paper Discharger Transfer Unit First Transfer AC Discharger Unit Transfer Roller Second Transfer Scanner Unit...
  • Page 54 Control System The control system consists of the following 4 (four) control parts and runs the printer by processing the interface signals transmitted from the Host computer and interfacing to the print, transfer, scanning and transport systems. Sequence Control Laser Control Fusing Temperature Control Interface Control <Basic Mechanism of Color Printing>...
  • Page 55 OPC Belt Cartridge Toner Cartridge Transfer Drum Fig.4-3 Toner M M M C C C C C Y Y Y Y Y Y . First Transfer Transfer Drum Y Y Y Y Y Y M M M C C C C C .
  • Page 56 <Structure of the OPC Belt> The OPC belt consists of a surface layer having a photoconductor (OPC) of organic material, the inner layer of an insulator material (PET / Mylar) and an aluminum deposit layer in between. The OPC belt is located as shown in Fig.4-5 as the main part of the print system.
  • Page 57: Print System And Transfer System

    Print System and Transfer System Fig.4-7 shows the basic structure of the print system having the OPC belt as the main part and the transfer system having the transfer drum as the main part. Color printing is achieved by actuating in sequence each process in the print system and transfer system. 4 cycles of actions 1 to 6 are required to form a full 24 bit color image on the transfer drum, only one cycle of actions 7, 8 and 9 is required to transfer the image to the paper from the transfer drum ready for fixing by actions 10 and 11.
  • Page 58: Structure Of The Printer

    1.1.1 Structure of the Printer Component Part Process Charger Charging Scanner Unit Exposing Toner Cartridge Developing OPC Belt Receives the Image Cartridge Transfer Drum Transfers the Image Belt Discharger Erase Lamp Discharges the Belt Cleaning Blade Cleaning the Belt Transfer Roller Transferring Paper Discharger Discharges the Paper...
  • Page 59: Basic Structure Of The Printing System

    1.1.2 Basic Structure of the Printing System A toner image is formed through the potential of the OPC belt varying in each of the charger, exposure, development, transfer and cleaning processes. Process of Print System (See Fig.4-9.) i) The OPC belt is biased to the voltage -CBV(V) by the power supply CBV. ii) A negative high voltage is applied to the charger unit by the power supply CHV, and a corona is generated as the result.
  • Page 60 Variation of OPC Belt Potential (See Fig.4-10.) i) The OPC belt is initially biased to -CBV(V). ii) The OPC belt surface is evenly charged to V (V) in the charging process. iii) The potential of the exposure part of the OPC belt is reduced to -VR(V) as it is exposed to the laser beam in the process of exposing, and an electrostatic latent image is formed on the OPC belt as the result.
  • Page 61: Details Of Each Process

    1.1.3 Details of Each Process Charging The charging process ensures that the OPC belt is evenly charged by the charger system. Structure of the Charger Unit (Refer to Fig.4-8 and Fig.4-11) i) The charger unit is located as shown in Fig.4-8. ii) The charger unit consists of the case, corona wire and grid.
  • Page 62 Exposing The exposing process means that the OPC belt surface is exposed to the laser beam to form an electrostatic latent image. Structure of Scanner Unit i) The scanner unit is located as shown in Fig.4-8. ii) The source of the laser beam is a semiconductor laser. iii) The laser light is scanned onto the OPC belt by converting the laser light to a beam of light through the lens and reflective mirror to form an electrostatic latent image.
  • Page 63 Developing The developing process means that an electrostatic latent image on the OPC belt is made visible by depositing toner onto the exposed areas of the OPC belt. Structure of the Toner Cartridge (Refer to Fig.4-8 & 4.14.) i) The toner cartridge is located as shown in Fig.4-8. ii) Four toner cartridges are made available from the top to bottom in the order black, yellow, magenta and cyan.
  • Page 64 Developer Toner roller OPC Belt Fig.4-15 Toner (M) Developing Exposing Fig.4-16 IV-13...
  • Page 65 First Transfer (Drum) The first transfer process means that the toner image on the OPC belt is transferred onto the transfer drum. Structure of the Transfer Drum (Refer to Fig.4-8.) i) The drum is located as shown in Fig.4-8. ii) Material of the drum is aluminum. iii) Semiconductor rubber is used to provide the drum surface as shown in Fig.4- iv) The transfer drum rotates by contacting and synchronizing with the OPC belt.
  • Page 66 First Transfer Process (Refer to Fig.4-18.) i) The OPC belt has been through the development process and contacts and synchronizes with the transfer drum. ii) The OPC belt has been biased to the potential of -CBV(V). The potential of the transfer drum is nearly GND.
  • Page 67 Belt Discharging (Erase Lamp) The belt discharging process means that upon completion of the drum transfer process, an LED light is radiated onto the OPC belt prior to mechanically cleaning the belt to discharge the residual charge. Structure of Erase Lamp i) The erase lamp is located as shown in Fig.4-8.
  • Page 68 Belt Cleaning The belt cleaning process means that the residual toner adhering to the OPC belt surface is mechanically scavenged. Structure of Belt Cleaning The blade for the belt cleaning is located relative to the OPC belt cartridge as shown in Fig.4-8. Process of Belt Cleaning (Refer to Fig.4-20.) There is residual toner on the OPC belt as it has not been completely transferred in the drum transfer process.
  • Page 69 Second Transfer (Paper) The second transfer process is where the toner image on the transfer drum is transferred onto the transported paper. Second Transfer Structure i) The transfer roller for the paper transfer is located as shown in Fig.4-8. ii) The transfer roller is normally kept out of contact with the transfer drum until the second transfer process starts.
  • Page 70 Paper Discharging The paper discharging process is where the transported paper onto which the toner transfer has been completed is separated from the transfer drum by applying an AC charge to the paper. Structure of Paper Discharger (Refer to Fig.4-22.) i) The AC charger unit for discharge the paper is located as shown in Fig.4-8.
  • Page 71 Drum Cleaning The drum cleaning process is where the residual toner on the transfer drum is removed. Structure of Drum Cleaning (Refer to Fig.4-23.) i) The drum cleaning unit is located as shown in Fig.4-8. ii) The drum cleaning brush is a semiconductor type so that the brush can clean the surface of the rotating transfer drum.
  • Page 72: Scanning System

    Scanning System This printer employs a semiconductor laser diode as a light source. This laser diode is switched according to the transmitted image data (video signal). The generated laser light scans over the OPC belt through a polygon mirror and lens, by which method electrostatic latent images will be formed on the OPC belt.
  • Page 73 Specification: Specification of the Scanner Unit is as follows; Item Specifications Rated Output of Laser Diode 5mW. Wave Length of Laser Beam Approx.785nm. Scanning Density 600dpi Scanning Width 314mm Scanner Motor speed 35,904rpm Number of Polygon Mirror Faces IV-22...
  • Page 74: Paper Transportation System

    Paper Transportation System Outline This printer employs automatic paper feeding from the media cassette. When toner images are formed on the transfer drum through the operations of the print system and transfer system, paper is fed by the pick-up roller and transported to the register roller.
  • Page 75 Media Cassette Paper Discharger Unit Paper Pick-up Roller Fusing Unit Registration Roller Paper Exit Unit Transfer Roller Paper Exit Roller Fig.4-25 IV-24...
  • Page 76: Fusing Unit

    Fusing Unit The fusing unit employs a thermal fusing system using heater lamps in the rollers. Paper carrying the combined toner image passes between the heat rollers. Heat and pressure is applied to the paper when passing between the heat rollers so that the toner image is melted and fused onto the paper.
  • Page 77 Fusing Process (Refer to Fig.4-27.) Silicone oil supplied from the oil bottle is applied to the surface of fuser roller. The toner image has been transferred onto the paper, but not yet fused. Transported paper passes between the heater roller and back-up roller.
  • Page 78: Structure Of The Control System

    STRUCTURE OF THE CONTROL SYSTEM Basic Structure 2.1.1 Electrical System and Functions Most of the main electrical parts of this printer are controlled by the MCTL (engine controller) PCB. <Structure of the Sequence Control> The basic structure of the sequence control is shown in Fig.4-28. Print Process Control: To control the print process from the paper feed through to the paper exit.
  • Page 79 Main Cooling Cooling Scanner Motor 2 Fan OZ Fan (EX) 2 Control Motor Panel Host Computer ATC (4 pcs.) Belt Drum Sensor Sensor MCTL (Engine Controller) Sequence Control Controller Control Laser Control Temperature Control Toner Empty Sensing Control Control Panel Control Error Processing Program Paper Sensor (F.CL) Paper Sensor (P.EN)
  • Page 80 <Layout & Function of the Electrical Parts> Print PCB (Refer to Fig. 4-29.) Name Function Video Controller PCB To receive the print data from the host computer, convert it into image data and then send the printing image data to the MCTL PWB 2. To control the sequence of processes of the printer: Fusing Temperature Control, Laser Output MCTL PWB 2...
  • Page 81 Motors (Refer to Fig.4-30.) Name Code Function To drive the OPC belt and the paper Main Motor 2 transport system. To drive the toner cartridge and the Developer Motor 2 developing system. Scanner Motor To scan the laser beam. To exhaust the ozone from the printer Cooling Fan OZ OZFAN (charger unit).
  • Page 82 Clutches and Solenoids (Refer to Fig.4-31.) Name Code Function To feed paper by coupling the feeding Paper Pick-up PCLU roller to the main gear unit at the correct Clutch timing for paper feeding. To transport paper by coupling the register roller to the main gear unit Registration Clutch RECL synchronized with the rotation of the...
  • Page 83 Sensors Function Paper Size Sensor Photo sensor to detect the paper size. Photo sensor to detect when paper is Paper Sensor fed from the media cassette. Photo sensor to detect that paper is Paper Sensor exited from the paper exit unit. Photo sensor to detect if paper is Paper Sensor P.EN...
  • Page 84 3. Paper Sensor (PT2) 14. Temperature Sensor 9. Belt Sensor (PBS) for Fusing Unit 7. Belt Sensor (DPJ) 13. Paper Sensor (F.CL) 15. Paper Sensor (EXF) 10. Toner Sensor ASSY (TPD/TTR) 5. Oil Sensor (OIL) 17-2. Interlock Switch (Top) 17-1. Interlock Switch 17-3.
  • Page 85: Control System

    Control System 2.2.1 Control of the Print Process A Micro CPU mounted on the MCTL PCB controls the print processes. <Print Sequence Diagram> Main Cooling Cooling Scanner Motor 2 Fan OZ Fan (EX) 2 Control Motor Panel Host Computer ATC (4 pcs.) Belt Drum Sensor...
  • Page 86 Laser Drive Control Circuit Laser Drive Control Circuit (LDC) consists of the video signal input circuit, laser drive circuit, laser diode, output sensing circuit and output control circuit, as shown in Fig.4-34. <Operation> (1) When the video signal is received, the laser drive control circuit switches the laser diode according to the video signal data.
  • Page 87 Control of the Fusing Temperature Each roller of the fusing unit is controlled to maintain the appropriate temperature so that toner will be fixed correctly onto the print paper. <Basic Structure of Temperature Control (Fig.4-35)> FLS: Thyristor to switch the power supply to the heat lamp. TFU1/TFU2 Temperature fuse to shut down the circuit for safety when the temperature becomes too hot within the fixing unit.
  • Page 88 <Basic Structure of Fuser Control> RY-1 ACOFF-P RY-1 HON-N Fusing Unit THERR ACOFF HON GA/CPU Fig.4-35...
  • Page 89 To maintain the temperature for fixing of the toner at approx. 146 C by turning the thyristor on and off. Reference temperature (approx. 185 C) to identify that it is excessively hot inside the fusing unit. When it reaches this point (approx.
  • Page 90 Interface Control <General> (a) Interface Type This Document describes the Video and Command/Status Interface between Laser Printer Contriller (LPC) and engine controller. Printer controller acts as a slave to LPC. Through Video Interface, LPC controls the Printer & Control Panel using Command/Status communication and transmits the synchronized video data to Printer laser diode.
  • Page 91 (c) Interface Circuit (Printer side) Table 4-1: Interface Circuit Interface Circuit Signal Name VIDEO-P Fast TTL VIDEO-N VIDEO-P M5M34050 HSYNC-N HSYNC-P M5M34050 PRREQ-N COMMAND-N ID1-N 0.01 F ID2-N SN74LS14 VSYNC-N 3.3 K IREADY-N STATUS-N KEY-STATUS-N 74LS06 IV-40...
  • Page 92 (d) Connector Pin Assignment The connector in the printer to connect to the controller board is type 128A-064S2B-:L14A (DDK) or the equivalent. Table 4-2: Connector Pin Assignment Pin No. Signal Name Pin No. Signal Name PSGND +5V-2 (Max 3A) PSGND +5V-2 (Max 3A) PSGND +5V-2D (Max 7A)
  • Page 93: Main Pcb (video Controller Pcb

    Main PCB (Video Controller PCB) 2.3.1 Outline The Main PCB consists of the circuits which perform the following functions; Receive the printing data from the computer. Convert the received data to the bitmap data such as characters or graphics. Control the engine and send the generated bitmap data as a video signal. The control panel is controlled by communicating with the engine CPU to display LCD messages, light the LEDs and display the button status, etc.
  • Page 94: Main Pcb Block Diagram

    <Main PCB Block Diagram> +3.3v / +1.65v Regurator +3.3v Clock 66MHz(CPU,SDRAM) PQ30RV31 TMPR4955-266 Generator 33MHz(PCI) 48MHZ(GA) (TX4955 266MHz) C8750 Regurator +3.3v +1.65v PQ070XZ01Z +3.3v CPU-Address/Data MultiBUS +5v/+3.3v SLOT2 SLOT1 CDCC I/F SLOT0 DIMM +3.3v (100pin) 3slots 348MB MAX CS,DQM PCI-BUS RJ45 Network Board LCX16347...
  • Page 95: Circuit

    2.3.2 Circuit CPU block x Model name: TMPR4955AF-266, MIPS 64bit RISC CPU manufactured by TOSHIBA x Clock speed: 66.7MHz (external) / 266MHz (internal) x Cache memory: 32KB (Command cache) / 32KB (Data cache) x Bus width: 32bit (external) / 64bit (internal) Internal Floating Point Unit (FPU) x Appearance: 160-pin QFP...
  • Page 96 DIMM DIMM (Dual-inline-Memory-Module) allows memory extension by up to 384MB. 3 DIMM sockets are available. (1slot pre-installed 64MB DIMM) The following type of DIMM can be installed into each slot. x Appearance: 100-pin x Memory type: SDRAM x Access time: PC66, CL2 x Parity: either Parity or Non-parity can be used...
  • Page 97 Engine interface block The engine interface consists of the following signals; <IREADY> The signal indicating the engine is ready <PRREQ> Signal requesting printing from the controller <KEY_STATUS> Signal indicating that a key switch status on the control panel has changed. <VSYNC>...
  • Page 98 The COMMAND signal and STATUS signal are the signals that are used to transfer the data between the controller and the engine, which perform as a half-duplex asynchronous serial communication. Refer to Fig.4-40. 6WRS ELW 6WDUW ELW 3DULW\ ELW 8ms (TYP) 30ms (MAX) 3DULW\ ELW 6WDUW ELW...
  • Page 99 Main PCB Circuit Diagram (1/8) LJ8907001 CODE NAME B512137CIR (1/8) IV-48...
  • Page 100 Main PCB Circuit Diagram (2/8) LJ8907001 CODE NAME B512137CIR (2/8) IV-49...
  • Page 101 Main PCB Circuit Diagram (3/8) LJ8907001 CODE NAME B512137CIR (3/8) IV-50...
  • Page 102 Main PCB Circuit Diagram (4/8) LJ8907001 CODE NAME B512137CIR (4/8) IV-51...
  • Page 103 Main PCB Circuit Diagram (5/8) LJ8907001 CODE NAME B512137CIR (5/8) IV-52...
  • Page 104 Main PCB Circuit Diagram (6/8) CODE LJ8907001 NAME B512137CIR (6/8) IV-53...
  • Page 105 Main PCB Circuit Diagram (7/8) CODE LJ8907001 NAME B512137CIR (7/8) IV-54...
  • Page 106 Main PCB Circuit Diagram (8/8) LJ8907001 CODE NAME B512137CIR (8/8) IV-55...
  • Page 107: Power Supply Unit

    Power Supply Unit Outputs and Use Output Terminal Rated Output +5V-1 For control of the printer. +5V, 2A +5V-1R For control of the laser. +5V-2 +5V, 8A MAX For control of the interface. (8A MAX) +5V-2D +24V-1 +24V, 6.5A For control of printer charging. 120V, 8A 1000W For connection of the fuser heater (HP).
  • Page 108 Layout of Connector Pin Assignment - Power Supply Unit - Fig.4-40 IV-57...
  • Page 109 Connector Pin Assignment ACN1 Manufacture: MoLex Type: 53313-2815 Pin No Signal Name Interface Pin No Signal Name Interface +5V-1 +5V-1 Output DCOFF2-P +5V-2D OFF Signal Signal Ground +5V-1 +5V-1 Output SGND (+5V type ground) Signal Ground +5V-D +5V-D Output SGND (+5V type ground) Signal Ground +5V-D...
  • Page 110 ACN2 Manufacture: MoLex Type: 5277-02A Pin No Signal Name Interface Pin No Signal Name Interface +24V Output through +24V Output through DSW-O DSW-I Door Switch. Door Switch. ACN3 Manufacture: MoLex Type: 5566-08A Pin No Signal Name Interface Pin No Signal Name Interface SWRUS-P Power Supply (OPEN)
  • Page 111: High Voltage Power Supply Unit

    High Voltage Power Supply Unit Outputs and Function Power Supply (P/S) Approx. Output Voltage Function Approx. Output Name Max (V) Typical (V) -7kV Max -5.5kV Charging CHV(-) -650 A -550 A -600V First Transfer CBV(-) -1200V Max -1.5 A DBV(-A) Developing -1600V Max -240V...
  • Page 112 Layout of Connector Pin Assignment - High Voltage Power Supply Unit - Fig.4-41 IV-61...
  • Page 113 Connector Pin Assignment BCN1 Manufacture: MoLex Type: 53313-1815 Pin # Signal Name Interface +24V-1 +24V-1 PGND PGND Sensor Signal of Fusing Unit FUCHK Installation. PGND PGND ACVON-N AC Output ON Signal. PWMON-N PWM Control ON Signal. CHVON-ON CHV Output ON Signal. CHVERR CHV ERROR Sensor Signal.
  • Page 114: Wiring Diagram

    To IOD2 ECN2 I O D 1 P W B 2 2.6 Wiring Diagram LOWER PAPER FEEDER UNIT (LFU) Developer Motor 2 Paper Sensor DCN10 DCN9 Paper Size Sensor 2 DCN8 Paper Pick-up Clutch PCLL Erase Lamp Toner Sensor DCN7 LF3 Clutch D Toner Sensor DCN13...
  • Page 115 (1) DCN2: IOD1 PWB 2 - Power Supply Unit ACN1 (30 pins) Pin No. Signal Name Pin No. Signal Name +5v-1 DCOFF2-P +5v-1 SGND +5v-D SGND +5v-D SGND ACSYNC-N SGND DCOFF1-P +5v-1R ACOFF-P HON-N TESTI2 +24V-1 TESTO2 +24V-1 TESTI1 +24V-1 TESTO1 +24V-1 PGND...
  • Page 116 (5) I1CN1: MCTL PWB 2 - IOD1 PWB 2 DCN1 (50 pins) Pin No. Signal Name Pin No. Signal Name I/OAD2 DMON-N I/OAD1 DCOFF1-P I/OAD0 DMCLK I/ODATA3 ACVON-N I/ODATA2 CHVON-N I/ODATA1 PWMON-N I/ODATA0 CBVPWM-N LEDON-N DBV (MC) PWM-N DMRDY-N DBV (KY) PWM-N I/ODATA4 FCBVPWM-N (Reserved)
  • Page 117 (7) DCN4: IOD1 PWB 2 - Paper Sensor (D.EN), Paper Sensor (PT1) Paper Sensor (P.EN), OHP Sensor 3 (OHP) Pin No. Signal Name Pin No. Signal Name +5v-S HPSEN-N SGND +5v-S PT1-N SGND +5v-S PEU-P SGND +5v-S OHPSENU SGND SGND (8) DCN6: IOD1 PWB 2 - Paper Size Sensor 2 (PSU) Pin No.
  • Page 118 (11) DCN8: IOD1 PWB 2 - Lower Paper Feeding Unit Pin No. Signal Name Pin No. Signal Name +24v-1 PKCLL1ON-N FDCLL1ON-N PSL1 PSL2 PSL3 PSCST1 PEL1-P OCST1-N +5v-D SGND +24v-1 +5v-D SGND SGND (12) DCN14: IOD1 PWB 2 - Paper Sensor (PT2), Paper Sensor (F.CL) Paper Sensor (EXF), Cooling Fan (EX) 2 Pin No.
  • Page 119 (14) I2CN: MCTL PWB 2 – IOD2 PWB 2 ECN1 (22 pins) Pin No. Signal Name Pin No. Signal Name DCL (C) ON-P DCL (M) ON-P DCL (Y) ON-P DCL (K) ON-P PSL (KY) ON-P PSL (MC) ON-P MMCLK MMON-N MMREV-N MMENC RECLON-P...
  • Page 120 (20) ECN9: IOD2 PWB 2 - Fixing Clutch (FUCL) Pin No. Signal Name Pin No. Signal Name +24v-1 FUCLON-N (21) ECN11: IOD2 PWB 2 - Cleaner Clutch 3 (FBCL) Pin No. Signal Name Pin No. Signal Name +24v-1 FBCLON-N (22) ECN3: IOD2 PWB 2 - Cooling Fan OZ Pin No.
  • Page 121 (28) ECN12: IOD2 PWB 2 - Main Motor 2 Pin No. Signal Name Pin No. Signal Name MMRDY-N MMON-N MMCLK PGND +24v-1 SGND +5v-1 MMENC MMREV-N (29) DCN9: IOD1 PWB 2 - Developer Motor 2 Pin No. Signal Name Pin No. Signal Name DMRDY-N DMON-N...
  • Page 122 (33) ACN2: Power Supply Unit - Interlock Switch Pin No. Signal Name Pin No. Signal Name DSW-O DSW-I (35) MCTL PWB 2 PACN - PANEL PWB (16 pins) Pin No. Signal Name Pin No. Signal Name PAI/ODATA0 PAI/ODATA1 PAI/ODATA2 PAI/ODATA3 PAI/ODATA4 PAI/ODATA5 PAI/ODATA6...
  • Page 123 (39) PRINTER CNDUP - Duplex Unit Pin No. Signal Name Pin No. Signal Name D-COMMAND SGND DUMBUSY2-N SGND D-STATUS SGND Reserved DUPCHK-N DUMBUSY1-N PT-1 DUPRES-N SGND PGND PGND +24v-2 +24v-2 +5v-D SGND +5v-1 (40) Fusing Unit Pin No. Signal Name Pin No.
  • Page 124 CHAPTER V CONTROL PANEL OPERATION...
  • Page 125 CONTENTS CHAPTER V CONTROL PANEL OPERATION ......V-1 1. PANEL LAYOUT ..................V-1 2. VIDEO CONTROLLER MODE ..............V-2 2.1 Configuration of Operational Mode.................. V-2 2.2 Line Test Mode ........................ V-3 2.3 DRAM Test Mode ......................V-7 2.4 Test Print Mode ....................... V-8 2.5 NVRAM Reset Mode .......................
  • Page 126: Panel Layout

    CHAPTER V CONTROL PANEL OPERATION PANEL LAYOUT Power Ready Data Alarm Cancel Secure Print Menu Reprint Back Fig.5-1 LED / Button Name LCD: 16 character by 2 lines Power LED Ready LED Data LED Go button Job Cancel button Alarm LED Secure Print button - button + button...
  • Page 127: Video Controller Mode

    VIDEO CONTROLLER MODE This section describes the operation and maintenance functions in the Video Controller Mode. Configuration of Operational Mode This printer has various functions as set out in Table 5-1 for users to easily perform general test printing, general settings and some maintenance work. (1) Normal Mode: After turning on the printer, the printer goes into Normal Mode.
  • Page 128: Line Test Mode

    Line Test Mode This mode tests the following items; Item Self-test Description LCD TEST Displays the checker pattern LED TEST Checks that all LEDs are on / off. SW TEST Checks that all buttons work correctly. SENSOR TEST Checks that all sensors work correctly. RAM SIZE TEST Displays the NVRAM size TRAY 1 CHECK...
  • Page 129 3) Press the Go button to implement the SW TEST. The following display appears on the LCD and the LEDs are all turned off. Check that the LEDs are turned on and the corresponding number appears as follows when pressing the buttons on the control panel in order. Corresponding button number on the panel X X X X X X X X 1 2 3 4 5 6 7 8...
  • Page 130 5) Press the Go button to implement the RAM SIZE CHECK. The RAM size installed into the printer is displayed. Check that the RAM size is correct. RAM CHECK START RAM SIZE = 64MB 6) Press the Go button to implement the TRAY1 CHECK. The paper size of the installed cassette 1 is displayed.
  • Page 131 8) Press the Go button to implement the COMPACT FLASH - R/W TEST. The reading/writing test of the compact flash card is implemented. Check that no error occurs. CARD R/W START CARD R/W OK CARD R/W OK: The compact flash card works correctly. CARD R/W ERROR: The compact flash card has a problem.
  • Page 132: Dram Test Mode

    DRAM Test Mode This mode tests DIMMs installed on the main (video controller) PCB. <Procedure> 1) To start the test program: While holding down the Go button and + button, turn on the power. “DRAM CHECK START” will be displayed. Press the Job Cancel button to start the DRAM check.
  • Page 133: Test Print Mode

    Test Print Mode This mode prints the specified pattern in order to check the engine. <Procedure> 1) Press the -, + Set buttons in this order while holding down the Go button to enter the test print mode. 2) The ‘PRINT MENU’ message is displayed on the LCD. Select ‘single test print’ or ‘repeat test print’...
  • Page 134: Engine Controller Mode

    ENGINE CONTROLLER MODE This section describes the operation and setting procedures for each engine test in the Engine Controller Mode. In order to go into the Engine Controller Mode, turn on the printer while holding down the Secure Print, Back, Set buttons. Configuration of Operational Mode This printer has the various functions as set out in Table 5-2 for the user to easily understand the operation status of the printer engine during maintenance work.
  • Page 135 Table 5-2 Normal Mode READY Power LED OFF Ready LED ON WAIT Power LED BLINK PRINT Power LED OFF CHK MEDIA TYPE Power LED ON CHK MEDIA for DUPLEX NO MEDIA CHK OUTER SELECTION NO TRAY STACKER FULL REPLACE TONER CHECK FUSER OIL CHK CLEANING ROLLER CHECK WASTE TONER PACK...
  • Page 136: Operation Of Normal Mode

    Operation of Normal Mode Normal Mode displays on the control panel the operational status of the printer when in the “ONLINE” state and the necessary information for the operator to implement ordinary maintenance work. Operation Procedures 1) Press the power button to turn on the printer while holding down the Secure Print, Back, Set buttons Refer to Fig.5-1.
  • Page 137 Code No. LCD Message Description of Message The Power LED is lit. The engine has completed the 00 READY [*1] warming-up process and is now ready ] [*4] to print. The engine is ready to receive “PRREQ”, signal from LPC. [*1]: Applicable paper feeder is indicated as follows;...
  • Page 138 Code No. LCD Message Description of Message Engine stands by as “CHECK MEDIA 11-1 TYPE” status. CHECK MEDIA TYPE The Power LED is lit. 11 CHK MEDIA [*1] [*1]: Applicable paper feeder is indicated TYPE [*4] as follows; /UPP: Upper Cassette /LOW: Lower Cassette Confirm whether the applicable paper cassette is loaded with paper.
  • Page 139 Code No. LCD Message Description of Message The engine is idling. 12-1 NO TRAY UPP/LOW The Power LED is lit. 12 NO TRAY [*1] [*1]: Paper feeder without the paper cassette is indicated as follows; [*4] /UPP: Upper Cassette /LOW: Lower Cassette Install the applicable media cassette to the paper feeder indicated on the LCD.
  • Page 140 Code No. LCD Message Description of Message The engine is idling. CHECK WASTE TONER PACK 14-3 The Power LED is lit. Replace the waste toner pack with a new one. 14 CHECK WASTE This message will be automatically TONER PACK[*4] cleared by open &...
  • Page 141 Code No. LCD Message Description of Message The engine is idling. ALIGN TONER CG 16-3 The Power LED is lit. 16 ALIGN [*5] [*5]: The color of the incorrectly installed TONER CG [*4] toner cartridge will be indicated as follows; Yellow Magenta Cyan...
  • Page 142 Code No. LCD Message Description of Message The engine is standstill. MEDIA JAM The Power LED is lit. 17 MEDIA JAM [*7]: The kind of jam (location of jam) is [*7] [*4] indicated as follows; FEED: Paper Feeder INNER: Inside of Printer OUTER: Paper Exit DRUM:...
  • Page 143: Service Mode

    Service Mode Service mode is a unique mode for the maintenance of the printer only, without the video controller card. In this mode, you can check the operation status of the printer engine Off- line and also carry out maintenance work for each of the printer components. Procedure 1) Hold down the Secure Print, Back, Set buttons and turn the printer Power on.
  • Page 144 GRID PRINT A single color or two color (R,G,B) Grid Pattern and a full color Stripe Pattern can be printed as Test Prints. Procedure Description of Procedures LCD Message 1) Press the Reprint button. SERVICE MODE TEST PRINT 2) Using the Back or Set button, select the desired pattern (ex.
  • Page 145 NEXT CARE INFORMATION Information relating to the replacement timing of periodical replacement parts can be obtained. This is the life for each of the components in images or pages. Procedure Description of Procedures LCD Message 1) Press the Reprint button after selecting Screen (a) “NEXT CARE INFO”.
  • Page 146 CASSETTE TYPE Desired paper feeding cassette can be selected. Procedure Description of Procedures LCD Message 1) Press the Reprint button after selecting Screen (a) “CASSETTE TYPE”. SERVICE MODE CASSETTE TYPE 2) Using the Back or Set button, select the applicable code of the desired cassette (A, B 33 CASSETTE TYPE or C), and then press the Reprint button.
  • Page 147 TOTAL PAGE The total number of printouts can be confirmed. Procedure Description of Procedures LCD Message 1) Press the Reprint button after selecting “TOTAL PAGE” mode. SERVICE MODE TOTAL PAGE 2) Select one type of page from among TOTAL PAGE, DPL PAGE. TOTAL PAGE 3) 6 digit number is displayed.
  • Page 148 EACH IMAGE Number of created images for each color used in printing can be confirmed. Procedure Description of Procedures LCD Message 1) Press the Reprint button after selecting “EACH IMAGE” mode. SERVICE MODE EACH IMAGE 2) Using the Back or Set button, select the subject color and then press the Reprint 35 IMAGE OF button.
  • Page 149 CLEAR CARE Care Code counters displayed on the LCD can be cleared. Make sure that you clear the relevant CLEAR CARE mode whenever replacing the applicable periodical replacement parts with new ones. Procedure Description of Procedures LCD Message 1) Press the Reprint button after selecting “CLEAR CARE”...
  • Page 150 MEDIA MANAGE The signal from the OHP sensor can be ignored when the media is selected to OHP. However, this mode should not be used under normal circumstances. Procedure Description of Procedures LCD Message 1) Press the Reprint button after selecting “MEDIA MANAGE”.
  • Page 151 FACTORY MODE This mode consists of 9 (nine) subordinate modes for the confirmation of operation and the resetting functions necessary for maintenance work. Basic Configuration FACTORY MODE DP CHECK BD CHECK FU CHECK MARGIN ADJUST LIFE PERIOD SET NVRAM TUNE UP NVRAM INITIAL TOTAL PAGE SET EACH IMAGE SET...
  • Page 152 DP CHECK Each individual color Toner cartridge can be driven. Procedure Description of Procedures LCD Message 1) Press the Reprint button after selecting “DP CHECK”. 39 FACTORY MODE DP CHECK 2) Using the Back or Set button, select the desired color and then press the Reprint 40 DP CHECK button.
  • Page 153 BD CHECK Laser beam position and laser power can be checked. Procedure Description of Procedures LCD Message 1) Press the Reprint button after selecting “BD CHECK”. 39 FACTORY MODE BD CHECK 2) The scanner motor scans the laser beam as it is rotating.
  • Page 154 MARGIN ADJUST The position of the top margin and left margin can be confirmed and adjusted within the range -3.5mm max. and +3.5mm max. Procedure Description of Procedures LCD Message 1) Press the Reprint button after selecting “MARGIN ADJUST”. FACTORY MODE 2) Using the Back or Set button, select either MARGIN ADJUST TOP or LEFT1/LEFT3 and then press the...
  • Page 155 LIFE PERIOD Replacement life of the periodical replacement parts can be set. Procedure Description of Procedures LCD Message 1) Press the Reprint button after selecting “LIFE PERIOD” mode. 39 FACTORY MODE LIFE PERIOD SET 2) Using the Back or Set button, select the desired code to be set and then press the Reprint button.
  • Page 156 NVRAM TUNE UP This mode is not used in normal operations, but is used when fine adjustment of the adjust value is required. This mode consists of following 8 (eight) subordinate modes: Configuration of NVRAM TUNE UP Factory Value at Ex- Work NVRAM TUNE UP 45-1...
  • Page 157 45-1 LP TUNE UP This mode should be used when optical density, line thickness and/or color reproduction needs to be adjusted. The adjustment is made by changing the laser power against the reference value 0 (zero) in the range -4 to +4. Description of Procedures LCD Message 1) Press the Reprint button after selecting “NVM...
  • Page 158 45-2 THV TUNE UP This mode shall be used when the transfer voltage needs to be adjusted due to errors such as transfer failure onto the media. The adjustment is used to change the transfer voltage, subject to the media to be used, against the reference value 0 (zero) in the range -4 to +4.
  • Page 159 45-3 DBV TUNE UP This mode shall be used when the image optical density needs to be adjusted. Adjustment of the developer bias voltage against the reference value 0 (zero) in the range between the step -4 and +4. Description of Procedures LCD Message 1) Press the Reprint button after selecting “NVM TUNE UP”.
  • Page 160 45-4 CBV TUNE UP This mode should be used when image defects attributed to the OPC belt need to be improved. Adjustment is to alter the OPC belt bias voltage against the reference value 0 (zero) in the range between the step -4 to +4. Description of Procedures LCD Message 1) Press the Reprint button after selecting “NVM...
  • Page 161 45-5 FBV TUNE UP This mode should be used when image defects attributed to the transfer drum need to be improved. Adjustment is to adjust the drum cleaner bias voltage against the reference value 0 (zero) in the range between the step -4 and +4. Description of Procedures LCD Message 1) Press the Reprint button after selecting “NVM...
  • Page 162 NVRAM INITIAL This mode can initialize (data clear) all the data of NVRAM on MCTL PWB 2, and also can execute NVRAM CLEAR to clear C3 error when occurred. WARNING NVRAM INITIAL is not used under normal circumstances; Bear in mind that execution of this mode is beset with loss of all the data in NVRAM.
  • Page 163 TOTAL PAGE SET This mode can reset the number of total pages in the NVRAM whenever NVRAM INITIAL has been executed or the MCTL PWB 2 is replaced. Description of Procedures LCD Message 1) Press the Reprint button after selecting “TOTAL PAGE SET”.
  • Page 164 EACH IMAGE SET This mode can reset the number of total pages of each color in the NVRAM whenever NVRAM INITIAL is executed or the MCTL PWB 2 is replaced. Description of Procedures LCD Message 1) Press the Reprint button after selecting “EACH IMAGE SET”.
  • Page 165 NEXT LIFE SET This mode is to set the replacement timing (number of prints) of periodic replacement parts. Description of Procedures LCD Message 1) After selecting NEXT LIFE SET, press Reprint button. 39 FACTORY MODE 2) After selecting the code to be set, press Reprint button.
  • Page 166: Adjustment Work Procedures

    Adjustment Work Procedures 3.4.1 Adjustment of Top and Left Margin The top and left margins can be adjusted by button operation on the control panel. <Purpose> If there is no top margin or left margin set for the print guarantee area or when the MCTL PWB 2 is replaced, the adjustment of top and left margin will be required.
  • Page 167 3.4.2 Setting of Engine NVRAM Data As data in the NVRAM has been preset to the optimum value at the factory, it is not necessary to change the preset values under normal conditions. However, fine adjustment may be required subject to the media or operational conditions. <Purpose>...
  • Page 168 3.4.3 Confirmation and Setting of Total Number of Printouts The total number of printouts is stored in the RAM. Confirmation and setting of total number of printouts can be carried out on the control panel. <Purpose> Total number of printouts will be reset when changing the MCTL PWB 2 or executing an NVRAM INITIAL.
  • Page 169 3.4.5 Initial Setting of Engine NVRAM Implement the initial setting at the replacement of MCTL PWB 2 after clearing the contents of NVRAM. <Purpose> The number of images for each color will be reset when changing the MCTL PWB 2 or executing NVRAM INITIAL.
  • Page 170 CHAPTER VI...
  • Page 171 CHAPTER VI PERIODIC MAINTENANCE VI-1 VI-1 GENERAL 1.1 Handling Precautions VI-1 1.1.1 List of Maintenance Tools VI-2 1.1.2 List of Consumables for Maintenance VI-3 1.2 Periodic Maintenance Cleaning VI-4 1.2.1 Cleaning the Registration Roller 2 / Paper Pick-up Roller VI-7 1.2.2 Cleaning the Transfer Roller 2...
  • Page 172: Chapter Vi Periodic Maintenance

    CHAPTER VI PERIODIC MAINTENANCE 1. GENERAL 1.1 Handling Precautions Since this high quality laser printer is a precision equipment, daily checking and periodic maintenance is indispensable to maintain the expected high performance. The following is the list of important precautions & action items for maintenance and periodic replacement parts: 1) Refrain from any operation, disassembly or modification that is not set out in this manual.
  • Page 173 1.1.1 List of Maintenance Tools Table 6-1 below lists the maintenance tools required for the printer. Table 6-1 Tool Name Function Phillips Screwdriver #1 For M3 Phillips Screwdriver #2 For M4 Phillips Screwdriver (short shank) #2 For M4 Slotted Screwdriver #1 For slotted head screw Slotted Screwdriver #2 For slotted head screw...
  • Page 174 1.1.2 List of Consumables for Maintenance Table 6-2 below lists the consumables for maintenance. Table 6-2 Tool Name Quantity Function Toner Cartridge (Y) 1 piece Test Print Toner Cartridge (M) 1 piece Test Print Toner Cartridge (C) 1 piece Test Print Toner Cartridge (K) 1 piece Test Print...
  • Page 175: Periodic Maintenance Cleaning

    1.2 Periodic Maintenance Cleaning See Table 6-3 for details of periodic maintenance cleaning for the following parts. 1) Registration Roller 2 / Paper Pick-up Roller 2) Transfer Roller 2 3) Paper Discharger 4) OPC Belt Cartridge 5) Dustproof Glass of the Optical Unit 2 6) Printer Interior WARNING Before starting any maintenance work, make sure you have unplugged the power...
  • Page 176 Periodic Maintenance Cleaning Work Table 6-3 Parts Name Cleaning Work Cleaning Cycle *1 Description Section (Condition or Case) 1. Pull out the media cassette. Defective image 2. Open the transfer unit 2. Smeared paper Registration 3. Clean the registration roller 2 and 1.2.1 Periodic maintenance Roller 2 / Paper...
  • Page 177 Periodic Maintenance Cleaning Work Table 6-3 Parts Name Cleaning Work Cleaning Cycle *1 Description Section (Condition or Case) 1. Remove the toner cartridges and the OPC Defective image Dustproof belt cartridge. Periodic maintenance 1.2.5 Glass of Optical 2. Remove the dust-proof glass. Unit 2 3.
  • Page 178 1.2.1 Cleaning the Registration Roller 2 / Paper Pick-up Roller The registration roller 2 and paper pick-up roller should be cleaned according to the periodic maintenance cleaning cycle set out in Table 6-3. Registration Roller 2 <Tools to Prepare> Cotton cloth (2 3 pieces) <Cleaning Procedure>...
  • Page 179 Paper Pick-up Roller <Tools to Prepare> Cotton cloth (1 pieces) <Cleaning Procedure> 1) Turn off the remote switch and power supply, and unplug the power code. 2) Pull out the media cassette. 3) Open the transfer unit 2. 4) With the cotton cloth, wipe off the stains such as paper dust adhered to the surface of paper pick-up roller.
  • Page 180 1.2.2 Cleaning the Transfer Roller 2 The transfer roller 2 should be cleaned according to the periodic maintenance cleaning cycle set out in Table 6-3. <Tools to Prepare> Cotton cloth (2 3 pieces) <Cleaning Procedure> 1) Turn off the remote switch and power supply, and unplug the power code. 2) Open the transfer unit 2.
  • Page 181 1.2.3 Cleaning the Paper Discharger The paper discharger should be cleaned according to the periodic maintenance cleaning cycle set out in Table 6-3. <Tools to Prepare> Cotton cloth (2 3 pieces) Cotton swab (2 3 pieces) <Cleaning Procedure> 1) Turn off the remote switch and power supply, and unplug the power code. 2) Open the transfer unit 2.
  • Page 182 4) Clean the discharger case housing with a cotton cloth. Fig.6-6 5) Clean the corona wire and the inside of the charger case with a cotton swab. 6) Re-install the charger unit into the transfer unit 2. Cotton swab Corona wire Fig.6-7 CAUTION Do not break the corona wire while cleaning the paper discharger unit.
  • Page 183 1.2.4 Cleaning the OPC Belt Cartridge The OPC belt cartridge should be cleaned according to the periodic maintenance cleaning cycle set out in Table 6-3. If the belt is exposed for more than two minutes to a light source of 800 lux, the belt may be damaged. Do not directly touch the OPC belt surface with bare hands or gloves.
  • Page 184 ii) Slide the wire cleaner attached on the corona case to the right end and left end several times. Return the wire cleaner to the home position. iii)Clean the OPC belt cartridge case. Corona wire :LUH FOHDQHU Fig.6-9 CAUTION Do not break the corona wire while cleaning the corona wire. Make sure that the wire cleaner is returned to the home position as shown in Fig.
  • Page 185 <Replacing Procedure> 1) Remove the OPC belt cartridge. 2) Cover the belt cartridge with the protective sheet and place the belt cartridge on the flat surface. Protective sheet Waste toner feeder Charger unit Fig.6-10 3) Open the green hooks at the right and left hand sides. 4) Remove the charge unit from the OPC belt cartridge.
  • Page 186 1.2.5 Cleaning the Dustproof Glass in the Optical Unit 2 The dustproof glass in the optical unit 2 should be cleaned according to the periodic maintenance cleaning cycle set out in Table 6-3. <Tools to Prepare> 1) Cotton cloth (2 3 pieces) 2) Cotton swab (2 3 pieces)
  • Page 187 1.2.6 Cleaning the Printer Interior The printer interior (bottom) should be cleaned according to the periodic maintenance cleaning cycle set out in Table 6-3. CAUTION Before cleaning the printer interior, protect the transfer drum with a piece of paper so that the nozzle of the vacuum cleaner is not contacted directly with the surface of the transfer drum 2.
  • Page 188: Periodic Maintenance Parts And Maintenance Cycle

    1.3 Periodic Maintenance Parts and Maintenance Cycle Maintenance Work should be implemented according to the “Periodic Maintenance Parts and Maintenance Cycle” set out in Table 6-4. VI-17...
  • Page 189 PR2002161 Table 6-4: Periodic Maintenance Parts and Maintenance Cycle Maintenance Parts Description Replacement Cycle *1 Parts Name Function Section (Condition or Case) 60K images or 12 Consists of the OPC belt and forms OPC Belt Cartridge months whichever Accessory an electrostatic latent image. comes first.
  • Page 190 PR2002161 Fuser cleaner Accessory Cleans the fusing unit. 20,000pages K: 12,000pages/ CMY: Toner cartridge Accessory Supplies toner to the OPC Belt 7,200 pages cartridge. Oil bottle Accessory Supplies oil to the fuser unit. 12,000pages Waste toner bottle Accessory Collects the waste toner. 18,000pages These figures are based on an average of 5% coverage of the printable area for one color using laser paper.
  • Page 191 PR2002161 ** After completing maintenance work, clear the message displayed on the control panel. (Refer to the list below.) LCD Maintenance LCD Operator Call Consumables Consumables Message Message TONER EMPTY K (Toner nearly empty) Toner cartridge Toner cartridge Black Black K C M Y TONER EMPTY CMY (Toner nearly empty)
  • Page 192: Periodic Maintenance Procedures

    2. PERIODIC MAINTENANCE PROCEDURES The printer displays messages on the control panel screen to indicate replacement is due for most of the periodic maintenance parts in both the Video Controller Mode and the Engine Controller Mode. However, the procedure to clear the message differs between the two modes. The following sections describe the Video Controller Mode messages only and should be used when replacing parts that have reached their life.
  • Page 193 3) Release the belt cartridge lock levers at both sides (left & right). Belt cartridge lock levers Fig.6-14 4) Pull out the OPC belt cartridge. OPC belt cartridge Fig.6-15 5) Prepare a new belt cartridge. Pull and remove the tension release pins from both sides (left & right), and then remove the protective sheet from a new OPC belt cartridge.
  • Page 194 6) Install the new OPC belt cartridge into the guides at both sides in the printer. OPC belt cartridge Fig.6-17 7) Set the belt cartridge lock levers at both sides (left and right). Belt cartridge lock lever Fig.6-18 8) Close the paper exit unit cover 2 and the paper exit front cover 2. 9) Turn on the printer.
  • Page 195: Fusing Unit Replacement

    2.2 Fusing Unit Replacement <Criterion of Replacement> The fusing unit should be replaced with a new one according to the periodical maintenance cycle set out in Table 6-4. When the time is due for replacement of the fusing unit, the following message appears on the control panel.
  • Page 196 <Work Procedure> Sequence of Disassembling 1) After turning off the remote switch and power supply, unplug the power code from the power outlet. 2) Open the paper exit unit cover 2. 3) Slacken the two securing screws securing the fusing unit. 4) Holding the handles at both ends of the fusing unit and remove the fusing unit from the printer.
  • Page 197 When removing the fusing unit, take care to keep the unit level so that no oil leakage or spillage occurs. When shipping the printer, remove the oil bottle and the fuser cleaner from the fusing unit. After removing the oil bottle, be sure to remove the oil remaining in the fusing unit following the procedure below.
  • Page 198 Sequence of Assembling 1) Install the new fusing unit onto the printer. i) Tighten the securing screws. ii) Close the paper exit unit cover 2. Fig.6-22 PRECAUTION When replacing the fusing unit, take time and great care to complete the job properly.
  • Page 199: Transfer Roller 2 Replacement

    2.3 Transfer Roller 2 Replacement <Criterion of Replacement> The transfer roller 2 should be replaced at the same time as a new discharger unit according to the periodical maintenance cycle set out in Table 6-4. When time is due for replacement of the transfer roller 2, the following message appears on the control panel.
  • Page 200 Sequence of Replacement 1) Lift the transfer roller 2 lock levers at both sides (right & left) to the arrow direction A. (Fig.6-25) 2) Holding the lock levers at both sides, pull them upwards to remove the transfer roller 2. Transfer roller 2 Fig.6-24 3) Install a new transfer roller 2 into the printer.
  • Page 201 Sequence of Assembling 1) Close the transfer unit 2. 2) Plug the power code into the power outlet and turn on the printer. 3) Upon completion of the warming-up process. 4) Press any of the Menu buttons (+, -, Set or Back) to take the printer Off Line. 5) Press + or –...
  • Page 202: Paper Discharger Unit Replacement

    2.4 Paper Discharger Unit Replacement <Criterion of Replacement> The paper discharger should be replaced with a new discharger unit at the same time as the transfer roller 2 according to the periodical maintenance cycle set out in Table 6-4. When time is due for replacement of paper discharger unit, the following message appears on the control panel.
  • Page 203 Sequence of Replacement 1) Remove the paper discharger referring to section 1.2.3 ‘Cleaning the Paper Discharger’. Paper discharger Fig.6-26 2) Clean the area where the paper discharger unit is mounted. 3) Install a new paper discharger unit into the transfer unit 2. Make sure to replace the transfer roller 2 with a new one at this time.
  • Page 204: Drum Cleaner 2 Replacement

    2.5 Drum Cleaner 2 Replacement <Criterion of Replacement> The drum cleaner 2 should be replaced with a new one according to the periodical maintenance cycle set out in Table 6-4. When time is due for replacement of the drum cleaner 2, the following message appears on the control panel.
  • Page 205 Sequence of Replacement 1) Remove the cleaner cover by releasing the two hooks. Cleaner cover Paper exit unit cover Hook Fig.6-28 2) Pull the drum cleaner 2 upwards to remove both ends of the cleaner from the bearings. 3) Holding the handle located on the top of the drum cleaner 2, lift the cleaner to remove it.
  • Page 206 4) Clean the area where the drum cleaner 2 is mounted. 5) Install a new drum cleaner 2 to the printer. Align both ends of the drum cleaner 2 to the bearings in the printer and push the drum cleaner 2 into the printer. Spring Shaft of drum cleaner 2 Shaft of counter...
  • Page 207: Ozone Filter Replacement

    2.6 Ozone Filter Replacement <Criterion of Replacement> The ozone filter should be replaced with a new one according to the periodical maintenance cycle set out in Table 6-4. This is to prevent ozone from being exhausted due to the deterioration of the ozone filter. CAUTION Ozone filter should be replaced with a new filter every 12 months, otherwise it may cause an offensive smell.
  • Page 208: Paper Pick-up Roller And Separator Pad 2 Replacement

    2.7 Paper Pick-up Roller and Separator Pad 2 Replacement <Criterion of Replacement> The paper pick-up roller and separator pad 2 should be replaced with new ones according to the periodical maintenance cycle set out in Table 6-4. When time is due for replacement of the paper pick-up roller and separator pad 2, the following message appears on the control panel.
  • Page 209: Transfer Drum 2 Replacement

    2.8 Transfer Drum 2 Replacement <Criterion of Replacement> The transfer drum 2 should be replaced with a new one according to the periodical maintenance cycle set out in the Table 6-4. When time is due for replacement of the transfer drum 2, the following message appears on the control panel.
  • Page 210 CHAPTER VII...
  • Page 211 CHAPTER VII DISASSEMBLY ............VII-1 1. BEFORE STARTING DISASSEMBLY............VII-1 1.1 Precautions........................VII-1 1.2 Preparation of Disassembly................... VII-1 2. PARTS NAME ..................VII-3 2.1 Cover ..........................VII-3 2.2 Circuit Boards (PCBs)....................VII-4 2.3 Motor Units ........................VII-4 2.4 Clutches and Solenoids ....................VII-5 2.5 Sensors..........................
  • Page 212 4.2.14 Paper Pick-up Clutch (PCLU) VII-29 4.2.15 Developer Drive Unit 2 VII-30 4.2.16 Toner Sensor ASSY (TPD) VII-30 4.2.17 FP2 Gear ASSY VII-31 4.2.18 Waste Toner Feeder (U) 2 VII-31 4.3 Left Side of the Printer ....................VII-32 4.3.1 Video Controller PCB VII-32 ...
  • Page 213: Chapter Vii Disassembly

    CHAPTER VII DISASSEMBLY BEFORE STARTING DISASSEMBLY Precautions Follow the precautions described below during maintenance work. 1) Do not implement any operation, disassembly or modification which is not set out in this manual. 2) When assembling or disassembling the printer, turn off the power supply and unplug the power cable from the power outlet before commencing any work.
  • Page 214 Table 7-1: Table of Screw Sizes Used in the Printer Size and shape of Screw Class Remarks Name of Scerw M-Threed Length Sharp Code BT3 x 8 Cross recessed To be used head tapping BT4 x 8 for installation screw. of plastic parts.
  • Page 215: Cover

    Cover <Front View> Paper Exit Unit Cover 2 4.4.1 Top Cover ASSY 2 4.1.5 Upper Side Cover (L) 2 4.1.2 Front cover 2 Side Cover (L) 2 4.5.2 4.3.2 Base Cover (L) 2 4.3.3 Media Cassette Side F Cover (L) Power Button Fig.7-1 <Rear View>...
  • Page 216: Circuit Boards (pcbs)

    Circuit Boards (PCBs) IOD2 PWB 2 Panel PWB 4.2.2 4.1.3 High-voltage Power Supply PCB (HVU) 4.3.6 IOD1 PWB 2 4.1.6 MAIN PCB ASSY HL-2600CN BRNET PCB UNIT 4100H Erase Lamp 4.1.14 MCTL PWB 2 4.3.4 DC Power Supply PCB (LVPS) 4.3.10 Fig.7-3 Motor Units...
  • Page 217: Clutches And Solenoids

    Clutches and Solenoids TR Cam Clutch 3 (FBCM) 4.2.3 Fixing Clutch (FUCL) Developer clutch 2 (K) 4.2.4 4.2.12 Cleaner Clutch 3 (FBCL) 4.2.5 Developer clutch 2 (Y) 4.2.12 TR Cam Clutch 3 (TRCM) 4.2.6 Developer clutch 2 (M) 4.2.12 Registration Clutch (RECL) 4.2.7 Developer clutch 2 (C) Paper Pick-up Clutch (PCLU)
  • Page 218 1. Top 2. Right 5. Front 6. Rear 4.1.1 4.2.1 4.5.1 4.6.1 Optical Unit 2 Transfer Unit 2 BC Lock Lever Base Cover (R) 2 3. Left 4. Paper Exit Unit 4.2.2 4.3.1 4.4.1 4.1.2 Paper Exit Unit Cover 2 / Video Controller PCB IOD2 PWB2 (with Base) 4.5.2...
  • Page 219: Top Of The Printer

    Top of the Printer 4.1.1 BC Lock Lever 1) Remove the set screws (2 pcs.) to remove the BC lock levers at the right and left hand sides. BC lock lever BC lock lever Fig.7-7 VII-7...
  • Page 220 4.1.2 Upper Side Cover (L) 2 1) Open the paper exit unit 2. 2) Remove the set screw BT4X8 securing the side cover (L) 2. Upper side cover (L) 2 Paper exit unit 2 Fig.7-8 3) Press the exterior of the side cover inwards(L) and unlock the hooks (three locations) from the side cover (L) 2.
  • Page 221 4.1.3 Panel PWB (including LCD) 1) Disconnect the connector from the panel case ASSY. 2) Release the two hooks on the panel base to remove the panel case ASSY and panel base from the printer. Panel case ASSY Hook Hook Fig.7-10 3) Remove the set screw BT4X10 (1 pc.) to remove the panel case ASSY from the panel base.
  • Page 222 4.1.4 Side Cover (R) 2 1) Remove the set screw BT4X8 (1 pc.) of side cover (R) 2 at the rear of the printer. Side Cover (R) 2 Fig.7-12 2) Slide the side cover (R) 2 in the direction of the arrows as shown in Fig.7-13. 3) Remove the side cover (R) 2 by releasing the two hooks.
  • Page 223 4.1.5 Top Cover ASSY 2 1) Remove the set screws BT4X8 (2 pcs.) from the top cover ASSY 2. (Top X 1 and Right hand side X 1) 2) Remove the top cover ASSY 2 from the printer. Top cover ASSY 2 Fig.7-14 3) Push the paper stopper set up from the back side of the top cover ASSY 2 to remove the paper stopper set.
  • Page 224 4.1.6 IOD1 PWB 2 1) Remove the set screws ST3X6 (4 pcs.) to remove the shield upper from the printer. 2) Disconnect all the harness connectors (15 pcs.) connected to the IOD1 PWB 2. 3) Remove the set screws ST3X6 (6 pcs.) to remove the IOD1 PWB 2 from the printer. Shield upper IOD1 PWB 2 Fig.7-16...
  • Page 225 4.1.7 Interlock Switch (Front) (for Front Cover 2) 1) Remove the set screw (1 pc.) to remove the SW ASSY from the printer. 2) Disconnect the connector. SW ASSY Fig.7-17 3) Release the two hooks and remove the interlock switch from the SW base F. Hook SW base F Interlock switch...
  • Page 226 4.1.8 SL2 PS Fan ASSY 1) Disconnect the connector from the PS fan ASSY. 2) Remove the set screw FT3X6 (1 pc.) to remove the SL2 PS fan ASSY from the printer. SL2 PS fan ASSY Fig.7-19 3) Remove the tape to remove the PS fan case and PS fun duct from the cooling fan (EX) 2.
  • Page 227 4.1.9 Interlock Switch (Top) 1) Remove the set screw BT3X8 (1 pc.) to remove the switch holder case from the PS fan case. 2) Remove the interlock switch from the switch holder case. CAUTION  Since the interlock switch is an important safety item, after installation confirm that the switch operates correctly.
  • Page 228 4.1.11 Waste Toner Feeder Unit / Belt Sensor (PBS) 1) Remove the set screws ST3X6 (2 pcs.) from the waste toner feeder unit. 2) Remove the waste toner feeder unit complete with the belt sensor. 3) Unclip and remove the belt sensor from the waste toner feeder unit. Hook Hook Belt Sensor...
  • Page 229 4.1.12 Transfer Drum 2 1) Open the transfer unit cover 2. 2) Protect the surface of the transfer drum 2 by covering it with paper. 3) Lift the transfer drum 2 up and forwards from the transfer unit 2 side. 4) Release the transfer drum 2 from the shaft supports.
  • Page 230 4.1.13 WT U Spring / DEV, Drive Gear 2 1) Remove the C ring and remove the four DEV, drive gears 2 from the (gear base). DEV, drive gear 2 C ring DEV, drive gear 2 DEV, drive gear 2 DEV, drive gear 2 Fig.7-25 Remove the set screw (1 pc.) to remove the (gear) and (gear holder) from the shaft.
  • Page 231 4.1.14 Erase Lamp 1) Remove the both ends of the erase lamp from the erase holder. 2) Disconnect the connector of the erase lamp. Erase Lamp Erase holder Erase holder Fig.7-27 4.1.15 SL3 Paper Guide D 1) Release the two hooks of the SL3 paper guide D. 2) Slide the SL3 paper guide D upwards and remove it from the frame.
  • Page 232: Right Side Of The Printer

    Right Side of the Printer 4.2.1 Base Cover (R) 2 1) Remove the set screws BT4X8 (2 pcs.) from the base cover (R) 2. 2) Remove the base cover (R) 2 from the base. Note: If the optional lower tray unit is fitted, it will be necessary to remove the lower tray clamp screw and locking bar to release the base cover (R) 2.
  • Page 233 4.2.2 IOD2 PWB 2 (with Base) 1) Disconnect all the harness connectors (16 pcs.) connected to the IOD2 PWB 2. 2) Remove the IOD harness guide. 3) Remove the set screws ST3X6 (2 pcs.) to remove the IOD2 PWB 2 (with base) from the printer.
  • Page 234 4.2.3 TR Cam Clutch 3 (FBCM) 1) Remove the outer plastic C ring from the shaft. 2) Pull out the TR cam clutch 3 (FBCM) from the shaft. 4.2.4 Fixing Clutch (FUCL) 1) Remove the outer plastic C ring from the shaft. 2) Pull out the fixing clutch (FUCL) from the shaft.
  • Page 235 4.2.6 TR Cam Clutch 3 (TRCM) 1) Remove the outer plastic C ring from the shaft. 2) Pull out the TR cam clutch 3 (TRCM) from the shaft. 4.2.7 Registration Clutch (RECL) 1) Remove the outer plastic C ring from the shaft. 2) Pull out the registration clutch (RECL) from the shaft.
  • Page 236 4.2.8 Main Motor 2 / BD Gear ASSY 2 1) Remove the connector (1 pc.) from the main motor 2 PCB. 2) Remove the screws ST3X6 (4 pcs.) holding the main motor 2 to the BD gear ASSY 2. 3) Remove the main motor 2 from the BD gear ASSY 2. 4) Remove the screws ST3X6 (3 pcs.) holding the BD gear ASSY 2.
  • Page 237 4.2.9 Developer Motor 2 CAUTION Take care not to stress the motor drive PCB when removing the connector or handling the motor / PCB assembly. 1) Remove the connector (1 pc.) from the developer motor 2 PCB. 2) Remove the set screws ST3X6 (4 pcs.) holding the developer motor 2 to the developer drive unit 2.
  • Page 238 4.2.10 Main Gear Unit 2 1) Remove the screws ST3X6 (4 pcs.) to remove the main gear unit 2 from the printer. Main gear unit 2 Fig.7-36 VII-26...
  • Page 239 4.2.11 WT Holder ASSY 2 1) Open the front cover 2. 2) Remove the waste toner box. 3) Remove the set screw BT3X8 (1 pc.) to remove the cover (FR) by pulling the cover (FR) forwards to release the lower hook. 4) Remove the set screw ST3X6 (1 pc.) to remove the WT holder ASSY 2 from the frame.
  • Page 240 4.2.13 Cooling Fan OZ 1) Remove the tape holding the cable harness to the top of cooling fan OZ. 2) Remove the set screw F3X6 (1 pc.) from the fan case assembly. 3) Remove the fan case assembly from the printer. Tape Fan case assembly Fig.7-39...
  • Page 241 4.2.14 Paper Pick-up Clutch (PCLU) 1) Remove the screws (2 pcs.) holding the inner plastic cover and remove the cover. 2) Remove the screws ST3X8 (3 pcs.) and BT4X8 (1 pc.) to remove the ozone fan duct and stay (R). Stay (R) Ozone fan duct Fig.7-41...
  • Page 242 4.2.15 Developer Drive Unit 2 1) Remove the set screws ST3X6 (4 pcs.) from the developer drive unit 2. 2) Remove the developer drive unit 2 from the frame. Developer drive unit 2 Fig.7-43 4.2.16 Toner Sensor ASSY (TPD) 1) Remove the set screws ST3X6 (2 pcs.) from the toner sensor ASSY. 2) Disconnect the connector to the toner sensor ASSY.
  • Page 243 4.2.17 FP2 Gear ASSY 1) Remove the set screws ST3X6 (2 pcs.) to remove the FP2 gear ASSY from the frame. FP2 gear ASSY Fig.7-45 4.2.18 Waste Toner Feeder (U) 2 Note: The waste toner feeder (L) is composed of plastic tube and auger spring gear unit. 1) Remove the set screw ST3X6 (1 pc.) to remove the waste toner feeder plate from the frame.
  • Page 244: Left Side Of The Printer

    Left Side of the Printer 4.3.1 Video Controller PCB CAUTION  Turn off the printer power switch and unplug the power cable from the outlet. Remove the interface cable connector. 1) Remove the two screws to remove the main controller board from the printer. Main controller board Fig.7-47 Remove the two screws securing the NC-4100h and remove the NC-4100h by...
  • Page 245 3) Remove the DIMM. Remove the screw at the center of the main PCB base plate. Remove the CPU heatspred. Remove the sheet (GP1-2.0-025025Y). Remove the two screws on the CDCC IF. Remove the two screws to remove the main PCB base plate. CPU heatspred Main PCB base plate GP1-2.0-025025Y...
  • Page 246 4.3.2 Side Cover (L) 2 1) Remove the set screw BT4X8 (2 pcs.) of side cover (L) 2. 2) Remove the side cover (L) 2. (Slowly pull up the side cover (L) 2, and release the hook from the front of the Upper cover.) Side cover (L) 2 Fig.7-50...
  • Page 247 4.3.3 Base Cover (L) 2 1) Remove the set screws TS4X8 (2 pcs.) from the base cover (L) 2. 2) Remove the base cover (L) 2 from the base. Note: If the optional lower tray unit is fitted, it will be necessary to remove the lower tray clamp screw and locking bar to release the base cover (R).
  • Page 248 4.3.4 MCTL PWB 2 CAUTION  Remove the Main (Video Controller) PCB before starting this disassembly. 1) Remove the set screw ST3X6 (1 pc.). Open the shield cover B as shown in Fig.7-49 to release the three hooks and remove the shield cover B from the printer. PRECAUTION  Read the internal RAM counter information from the MCTL PWB 2 prior to replacing the MCTL PWB 2.
  • Page 249 2) Disconnect all the harness connectors (8 pcs.) connected to the MCTL PWB 2. 3) Remove the set screws ST3X6 (4 pcs.) to remove the MCTL PWB 2 from the frame. MCTL PWB 2 Fig.7-53 VII-37...
  • Page 250 4.3.5 Fuser Connector 2 1) Remove the set screws ST3X6 (4 pcs.) to remove the shield cover A from the shield case ASSY. 2) Remove the set screw BT4X10 (1 pc.) to remove the side F cover (L) from the frame. 3) Remove the set screws BT3X6 (4 pcs.) to remove the shield case ASSY from the frame.
  • Page 251 4) Disconnect the PN/PH connectors connected to the power supply unit. 5) Remove the set screws M4X10 (2 pcs.) to remove the fuser connector 2 from the frame. * The set screw of the fuser connector 2 is unique. Fuser connector 2 PN connector PU connector Fig.7-55...
  • Page 252 4.3.6 High Voltage Unit 2 1) Disconnect all the harness connectors (3 pcs.) connected to the high voltage unit 2. 2) Remove the set screws ST3X6 (1 pc.) and BT3X8 (8 pcs.) from the high voltage unit 3) Remove the high voltage unit 2 from the frame. High voltage unit 2 Fig.7-56 WARNING...
  • Page 253 4.3.7 TR Terminal Base ASSY / Interlock Switch (Rear) 1) Open the back door. 2) Remove the set screws ST3X6 (2 pcs.) to remove the TR terminal base ASSY from the printer. 3) Disconnect the harness connector (1 pc.) connected to the interlock switch. 4) Remove the interlock switch from the TR terminal base ASSY.
  • Page 254 4.3.8 Paper Sensor (D. EN) 1) Disconnect the connector (1 pc.) connected to the paper sensor (D. EN). 2) Release the three hooks inside the frame to remove the paper sensor (D. EN) from the frame. Hook Hook Paper sensor (D. EN) Fig.7-58 4.3.9 Rear Cover 2 / Rear Cover (U) 2...
  • Page 255 4.3.10 Power Supply Unit / SW Button 1) Disconnect all the harness connectors connected to the power supply unit. 2) Remove the set screws ST3X6 (2 pcs.) to remove the bottom stay (L) from the frame. Bottom stay (L) Fig.7-60 VII-43...
  • Page 256 3) Pull the SW unit upwards to remove it from the frame. 4) Remove the set screw M4X6 (1 pc.) complete with the shakeproof washer to release the earthing harness. 5) Remove the set screws ST3X6 (4 pcs.) to remove the power supply unit from the frame (two hooks at bottom).
  • Page 257 4.3.11 FP Cassette Guide L/R Note: If the optional lower tray unit is fitted, remove the left hand screw of the front cross rail to release the media cassette guide. 1) Close the front cover unit 2. 2) Remove the set screw ST3X8 (1 pc.) from the FP cassette guide L assembly. 3) Move the FP cassette guide L to the direction of the arrow as shown in the figure below and release the plastic catches (4 pcs.).
  • Page 258 4.3.12 Paper Size Sensor 2 (PSU) 1) Remove the set screws ST3X8 (2 pcs.) to remove the paper size sensor 2 from the FP cassette guide L. FP cassette guide L Paper size sensor 2 RT sensor Fig.7-63 VII-46...
  • Page 259 4.3.13 Toner Sensor ASSY (TTR) 1) Remove the set screws ST3X6 (2 pcs.) from the toner sensor. 2) Disconnect and remove the toner sensor. Toner Sensor ASSY (TTR) Fig.7-64 4.3.14 Toner Key Sensor 2 (TNK) 1) Remove the set screws ST3X6 (2 pcs.) to remove the toner key sensor 2 from the frame.
  • Page 260 4.3.15 Belt Sensor (DPJ) / Oil Sensor (OIL) Release the three hooks. Then release the one hook by lifting the oil sensor cover slightly. Hook Hook Oil sensor cover Fig.7-66 2) Remove the set screw ST3X6 (2 pc.) to remove the oil sensor from the frame. 3) Release the two hooks to remove the belt sensor from the frame.
  • Page 261: Paper Exit Unit

    Paper Exit Unit 4.4.1 Paper Exit Unit Cover 2 / Paper Exit Front Cover 2 1) Open the paper exit unit cover 2. 2) Slide the four hooks to the direction of the arrow as shown in the figure below and remove the (P.
  • Page 262 5) Remove the set screws BT3X8 (4 pcs.). Bend the top of the paper exit unit slightly as shown in the figure below and release the top end of the paper exit front cover 2 from the paper exit unit to remove it. 6) Remove the set screws (2 pcs.) to remove the (P.
  • Page 263 4.4.2 Cooling Fan (EX) 2 1) Remove the paper exit filter (with case) from the cooling fan (EX) 2. 2) Remove the set screws (3 pcs.) and disconnect the harness connector of the cooling fan (EX) 2 to remove the cooling fan (EX) 2 from the P. EX frame assembly. P.
  • Page 264 4.4.3 Paper Sensor (F. CL) 1) Remove the set screw ST3X6 (1 pc.) and lift the FCS cover ASSY to release the three hooks. Remove the paper sensor (F. CL) from the FCS cover ASSY. 2) Disconnect the harnesses connector connected to the paper sensor (F. CL). Hook Hook Paper sensor (F.
  • Page 265 4.4.5 Discharging Brush 1) Remove the set screws BT4X6 (2 pcs.) from the discharger brush. 2) Remove the discharger brush and the plastic retainer. PRECAUTION  Do not deform the fur brush of the discharger brush. Discharger brush Plastic retainer Fig.7-74 4.4.6 Paper Exit Roller...
  • Page 266 4.4.7 P. EX Switch Guide 1) Remove the set screws BT3X8 (4 pcs.) to remove the (paper exit sensor base) from the paper exit frame ASSY. (paper exit sensor base) Paper sensor (PT2) Fig.7-76 2) Remove the P. EX switch spring from the paper exit frame and P. EX switch guide. 3) Bend the P.
  • Page 267 4.4.8 Paper Sensor (PT2) 1) Remove the set screws BT3X8 (2 pcs.) to remove the (guide) from the (paper exit sensor base). 2) Disconnect the harnesses connector connected to the paper sensor (PT2). 3) Release the three hooks to remove the paper sensor (PT2). (guide) Hook Hook...
  • Page 268: Front Of The Printer

    Front of the Printer 4.5.1 Optical Unit 2 1) Open the front cover 2. 2) Release the two hooks at the front and three hooks at the top to remove the inner cover C from the printer. Hook Inner cover C Hook Fig.7-79 VII-56...
  • Page 269 3) Remove the set screws F3X10 (4 pcs.) from the optical unit 2. 4) Disconnect the harness connector (1 pc.) to remove the optical unit 2 from the printer. Optical unit 2 Fig.7-80 WARNING There is a class IIIb laser within the optical unit 2. Do not attempt to disassemble the laser.
  • Page 270 4.5.2 Front Cover 2 1) Remove the set screws BT4X10 (2 pcs.) from the front cover unit 2. 2) Release the four hooks to remove the front cover 2 from the front cover unit 2. Front cover unit 2 Hook Front cover 2 Hook Fig.7-81...
  • Page 271 4.5.4 FD2 Arm ASSY Release the hook to remove the FD2 arm ASSY from the front cover unit 2. Remove the set screw ST3X6 (1 pc.) of the FD arm ASSY. Incline the FD arm ASSY toward you and release the hook to remove the FD arm ASSY from the printer.
  • Page 272 4.5.5 Front Cover Unit 2 1) Close the front cover unit 2. 2) Disconnect the connector from the front cover unit 2. 3) Remove the set screws M4X6 (6 pcs.). Front cover unit 2 Fig.7-84 CAUTION  When removing the hinge of front cover unit 2, watch out the rebound of spring. In above instance, holding the fixture of hinge, remove the hook from the frame.
  • Page 273 4.5.6 Hinge Base 2 (L, R) 1) Remove the C ring (1 pc.) to remove the (shaft) from the hinge base 2. 2) Remove the hinge base 2 from the front cover unit 2. (shaft) Hinge base 2 C ring Fig.7-86 3) Remove the pin (1 pc.) of the bearing to remove the two bearings and (spring) from the hinge base 2.
  • Page 274 4.5.7 DE Solenoid ASSY 1) Remove the set screws BT4X10 (4 pcs.) to remove the front inner cover from the front unit base. 2) Remove the set screws BT4X10 (4 pcs.) to remove the DE solenoid ASSYs and developer cam ASSY from the front unit base. 3) Remove the developer cam ASSYs (4 pcs.) from the DE solenoid ASSY.
  • Page 275: Rear Of The Printer

    Rear of the Printer 4.6.1 Transfer unit 2 1) Open the transfer unit 2. 2) Remove the end of the TR3 rear band being attached to the frame as shown in the figure below. 3) Remove the set screw ST3X6 (1 pc.) to remove the TR3 hinge support from the printer.
  • Page 276 5) Remove the set screw BT4X10 (1 pc.) to remove the TR3 rear band from the transfer unit 2. 6) Remove the set screws BT3X8 (4 pcs.) to remove the transfer unit 2 cover 2 from the transfer unit 2. Transfer unit 2 TR3 rear band Transfer unit cover 2...
  • Page 277 4.6.2 Transfer Roller 2 1) Lift the transfer roller lock levers at the right and left hand sides to remove the transfer roller 2 from the transfer unit 2. Transfer lock lever Transfer roller 2 Transfer unit 2 Fig.7-91 4.6.3 Registration Roller 2 1) Remove the roller fixing C rings from both ends of the roller.
  • Page 278 4.6.4 Paper Sensor (P. EN) / OHP Sensor 3 1) Remove the set screws ST3X6 (2 pcs.) to remove the paper guide L from the printer. 2) Remove the set screws BT3X6 (2 pcs.) to remove the paper guide (UL) ASSY 2. 3) Disconnect the connectors (2 pcs.).
  • Page 279 4.6.5 Paper Sensor (PT1) 1) Release the three hooks to remove the paper sensor from the frame. 2) Disconnect the connector connected to the paper sensor. Hook Hook Paper sensor (PT1) Fig.7-95 4.6.6 Paper Pick-up Roller / Separator Pad 2 1) Move the paper pick-up roller to the direction of the arrow in the figure below to remove it.
  • Page 280: Fusing Unit

    Fusing Unit DANGER [Note in Parts Replacement] The fuser unit consists of important safety parts. Replacement of parts or disassembly and maintenance work should only be done at an appropriate service facility by skilled service personnel acquainted with electrical safety. After re-assembly the product safety should be reconfirmed. Since the fuser unit is very hot, make sure that the fuser unit and surrounding area are well cooled down prior to starting the replacement of parts.
  • Page 281 6) Remove the set screws ST3X6 (2 pcs.) to remove the oil pan unit 2 and FU felt ASSY 2 from the fusing unit. 7) Remove the set screws ST3X6 (2 pcs.) to remove the FU felt ASSY 2 from the oil pan unit.
  • Page 282 13) Remove the set screws ST3X6 (3pcs.). Open the fusing unit as shown in the figure below. Fusing unit Fig.7-100 14) Remove the back-up roller 2 from the fusing unit. 15) Remove the C ring from the gear to remove the gear (FU) (BR) 2. 16) Remove the ball bearing FU2 (2 pcs.) from the back-up roller 2.
  • Page 283 17) Remove the fusing roller 2 as shown in the figure below. 18) Remove the release levers (R) and (L). 19) Remove the Crings on both ends of the fusing roller 2. 20) Remove the gear (FU) (BR) 2 and FU2 gear 63. 21) Remove the C rings at both sides.
  • Page 284 23) Remove the E rings (1 pc.) to remove the (gear A) from the fusing unit. 24) Remove the E rings (1 pc.) to remove the (gear B) from the fusing unit. 25) Remove the E rings (1 pc.) to remove the (gear C) from the fusing unit. 26) Remove the E rings (1 pc.) to remove the (gear D) from the fusing unit.
  • Page 285 C ring Fusing roller 2 C ring FU2 gear 63 Gear (FU) (BR) 2 C ring C ring Ball bearing FU2 Frame Frame Back-up roller 2 C ring Gear (FU) (BR) 2 Frame Frame Ball bearing FU2 Fig.7-104 CAUTION  When re-assembling the fusing roller 2 and back-up roller 2, ensure to assemble the ball bearing FU2 correctly referring to the figures above.
  • Page 288: Chapter Viii Troubleshooting

    CHAPTER VIII TROUBLESHOOTING This chapter contains troubleshooting information for both the Video Controller Mode and the Engine Controller Mode. If any problem occurs during the normal usage of the printer, which means the printer is being used in the Video Controller Mode, clear the problem by referring to the troubleshooting information in the following sections for the Video Controller Mode or the user’s guide.
  • Page 289: Outline Of Troubleshooting

    OUTLINE OF TROUBLESHOOTING Printer Problem Paper Transport Operator Call Service Call Image Failure Error [Section 2.1] [Section 2 & 3] [Section 5] Enter the Engine Controller Mode Turn on the power while holding Turn on the power down the Mode, Back and Set after turning off the buttons after turning off the main printer.
  • Page 290: Video Controller Mode

    OPERATOR CALL Video Controller Mode The Ready LED is lit and an applicable message appears on the liquid crystal display (LCD) in the following cases; 1) Consumables require to be replenished. 2) Waste toner pack is full of waste toner. 3) Paper jam.
  • Page 291 Install the lower tray unit. NO TR ROLLER Install the transfer roller 2. ILLEGAL TONER Use only Brother genuine toner cartridges. NO TRAY 1/2 The indicated paper Tray was not detected, install it, or ensure it is inserted correctly. SIZE ERROR T1/2 Specify the correct paper size for the indicated tray.
  • Page 292 Display Message Remarks STORAGE FULL The RAMDISK SIZE is set to 0MB there is no more space to store jobs. STORAGE FULL There is no space in the Compact Flash. STORAGE FULL There is no space on the Flash Memory. DOWNLOAD FULL The download buffer of the printer is full.
  • Page 293: Engine Controller Mode

    Engine Controller Mode The Ready LED is lit, and applicable messages appear on the liquid crystal display (LCD) in the following cases; 1) Consumables require to be replenished. 2) Waste toner pack is full of waste toner. 3) Paper jam. 4) Periodic maintenance.
  • Page 294 Display Message Meaning Countermeasure Open the transfer unit 2 / Paper jam at paper paper exit unit and remove exit area paper jammed inside. Open the transfer unit 2 and remove the OPC belt Paper jam wound cartridge. Remove the paper around the transfer jam by unwinding the paper drum 2...
  • Page 295: Paper Transport Error

    PAPER TRANSPORT ERROR Paper is transported through the path shown in Fig.8-1. Paper jams at the following locations are easily cleared. Paper Pick-up Roller Fusing Unit Transfer unit 2 Paper Exit Unit Paper Exit Roller Fusing Unit Oil Bottle Drum cleaner 2 Top Cover OPC Belt Cartridge Paper Exit Unit...
  • Page 296: Inner Jam

    Inner Jam Problem Item Step Check Item Result Action Open the transfer unit 2 and check. Is there any paper inside the Remove the paper unit? inside. Is the transfer roller 2 firmly Fix the transfer roller 2 locked by the lock lever? with the lock lever.
  • Page 297: Service Call

    SERVICE CALL If errors or failures occurred inside the printer, the applicable error message will be displayed on the control panel, and the printer stops. If errors or failures repeat even after resetting the power button, confirm the error code and then call your Service provider. Error occurs.
  • Page 298: Video Controller Mode

    PR2001053 Video Controller Mode Table 8-4-1 Service Call Message Meaning Countermeasure ERROR S01 FATAL ERROR EX Update with a new Firmware. SERVICE CALL ERROR S02 ADRL ERROR EX Update with a new Firmware. SERVICE CALL ADRS ERROR EX Update with a new Firmware. ERROR S03 SERVICE CALL BUS ERROR EX...
  • Page 299 Service Call Message Meaning Countermeasure Replace with a new DIMM. ERROR H63 DIMM error D-RAM ERROR Replace with a new main ERROR H66 NVRAM write error (video controller) PCB. NV_W ERROR Replace with a new main ERROR H67 NVRAM read error (video controller) PCB.
  • Page 300 Status Display Description Developing motor error ERROR EE1 WARNING Main motor error ERROR EE2 WARNING Drum error ERROR EE3 WARNING ERROR EE4 Toner empty sensor error WARNING ERROR EE5 Transfer roller 2 solenoid error WARNING Drum cleaning solenoid error ERROR EE6 WARNING Drum cleaning clutch error ERROR EE7...
  • Page 301 Status Display Description Fuser temperature 4 error ERROR EH4 WARNING Beam detector error ERROR EL1 WARNING Scanner motor error ERROR EL2 WARNING ERROR ELL Laser power error WARNING ERROR EP1 Duplex controller hardware error WARNING Feeder pass select solenoid error ERROR EP3 WARNING Duplex motor error...
  • Page 302: Engine Controller Mode

    Engine Controller Mode Code Description NVRAM Error (MCTL PCB) Engine Controller MCTL PCB Hardware Error Process Timing Clock Error (Main Motor Clock Error) Clutch Error of the Yellow Developing Unit Clutch Error of the Magenta Developing Unit Clutch Error of the Cyan Developing Unit Clutch Error of the Black Developing Unit HPSI Signal Error (Retract Error of Black and Yellow Toner Cartridge)
  • Page 303 Chart 8-4 Troubleshooting Code Description of Error Cause of Error Clearance Method 1. Failure of MCTL PWB 2. 1. Turn on and off the power switch. NVRAM Error 2. Above method 1 does not work, implement "C3 Error Clearance Procedure". EEPROM 3.
  • Page 304 Code Description of Error Cause of Error Clearance Method 1. Power Feeding Failure 1. Implement the same clearance procedures employed for E2 error. Process Timing Error. 2. MM Failure [Note]: MM stands for OPC Belt Drive Main Motor. 3. MM Input Circuit Failure Implement the same clearance procedures employed for E2 error.
  • Page 305 Error Code Name of Part Developer Clutch 2 (DCLY) Confirm the connection of Connector. Is the connection proper between ECN14 of IOD2 and Clutch (DCLY) ? Connect the harness. Is the harness of Clutch (DCLY) broken ? Connect the connector properly. Is D1 Error cleared ? Complete Check the voltage at DCLY ON-N.
  • Page 306 Error Code Name of Part Developer Clutch 2 (DCLM) Confirm the connection of Connector. Is the connection proper between ECN15 of IOD2 and Clutch (DCLM) ? Connect the harness. Connect the connector properly. Is the harness of Clutch (DCLM) broken ? Is D2 Error cleared ? Complete Check the voltage at DCLM ON-N.
  • Page 307 Error Code Developer Clutch 2 (DCLC) Name of Part Confirm the connection of Connector. Connect the harness. Is the connection proper between ECN16 of IOD2 and Clutch (DCLC) ? Is the harness of Clutch (DCLC) broken ? Connect the connector properly. Complete Is D3 Error cleared ? Check the voltage at DCLC ON-N.
  • Page 308 Error Code Name of Part Developer Clutch 2 (DCLK) Confirm the connection of Connector. Is the connection proper between ECN13 of IOD2 and Clutch (DCLK) ? Connect the harness. Is the harness of Clutch (DCLK) broken ? Connect the connector properly. Complete Is D4 Error cleared ? Check the voltage at DCLK ON-N.
  • Page 309 Error Code Name of Part Developer Solenoid (PSL KY) Confirm the connection of Connector. Is the connection proper between ECN5 of IOD2 and Solenoid (PSL KY) ? Connect the harness. Is the harness of Solenoid (PSL KY) broken ? Connect the connector properly Complete Is D5 Error cleared ? Check the voltage at (PSL KY) ON-N.
  • Page 310 Error Code Name of Part Developer Solenoid (PSL MC) Confirm the connection of Connector. Connect the harness. Is the connection proper between ECN5 of IOD2 and Solenoid (PSL MC) ? Connect the connector properly. Is the harness of Solenoid (PSL MC) broken ? Is D6 Error cleared ? Complete Check the voltage at (PSL MC) ON-N.
  • Page 311 Error Code Concerned Part Developer Motor 2 (DM) Is there any unusual rotation noise while printing ? Replace the toner cartridge. Confirm the connection of connector. Is the noise cleared ? Job is complete. Is DCN9 of IOD1 properly connected with connector of DM1? Replace developer gear unit and motor.
  • Page 312 Error Code Concerned Part Main Motor 2 (MM) Confirm the connection of connector. Is the harness connector pin #1 (MMRDY-N) properly connected Adjust the harness (pin #1). between IOD2 and MM? Replace the main motor 2. Is E2 error cleared ? Replace the IOD2 PWB 2.
  • Page 313 Error Code Concerned Part Paper Sensor (D.EN) Is a belt cartridge properly installed ? Re-install or replace the belt cartridge. Is an encoder plate deformed ? Does a transfer drum rotate lightly ? Replace the transfer drum. Is a rotation torque excessive ? Confirm the connection of connector.
  • Page 314 Error Code Concerned Part Toner Sensor PCB.(LED side) Confirm the connection of a toner sensor PCB.(LED side) connector. Connect them properly. Is DCN7 of IOD1 properly connected with a connector of the toner sensor ? Is E4 error cleared ? Check the voltage(LEDON-N/P) Job is complete.
  • Page 315 Error Code Concerned Part TR Cam Clutch 3 (TRCM) Confirm the connection of a TR cam clutch 3 connector. Is ECN8 of IOD2 properly connected with a connector of the solenoid ? Connect them properly. Is ECN1 of IOD2 properly connected with 12CN of MCTL PWB 2? Is E5 error cleared ? Job is complete.
  • Page 316 Error Code TR Cam Clutch 3 (FBCM) Concerned Part Confirm the connection of a TR cam clutch 3 connector. Connect them properly. Is ECN10 of IOD2 properly connected with a connector of the solenoid ? Is ECN1 of IOD2 properly connected with 12CN of MCTL PWB 2? Is E6 error cleared ? Job is complete.
  • Page 317 Error Code Cleaner Clutch 3 Concerned Part Confirm the connection of a cleaner clutch 3 connector. Connect them properly. Is ECN11 of IOD2 properly connected with a connector of the clutch ? Is ECN2 of IOD2 properly connected with DCN10 of IOD1 ? Is ECN1 of IOD2 properly connected with 11CN of MCTL PWB 2? Is E7 error cleared ? Job is complete.
  • Page 318 Error Code Fixing Clutch(FUCL) Concerned Part Confirm the connection of a fixing clutch connector. Connect them properly. Is ECN9 of IOD2 properly connected with a connector of the clutch ? Is ECN1 of IOD2 properly connected with 12CN of MCTL PWB 2? Job is complete.
  • Page 319 Error Code Concerned Part Belt Sensor (PBS) Is a belt cartridge leaned to one side ? Replace the belt cartridge. Install the printer to be leveled out. Is a belt sensor stained ? Clean the belt. Is E9 error cleared ? Confirm the connection of connector.
  • Page 320 Error Code Erase Lamp (EL) Concerned Part Confirm the connection of a erase lamp connector. Is DCN7 of IOD1 properly connected with a connector of the erase lamp ? Connect them properly. Is DCN1 of IOD1 properly connected with 11CN of MCTL PWB 2? Is EL error cleared ? Job is complete.
  • Page 321 Error Code SL2 PS Fan Concerned Part Confirm the connection of a fan motor connector. Connect them properly. Is DCN18 of IOD1 properly connected with a connector of the fan motor ? Is DCN1 of IOD1 properly connected with 11CN of MCTL PWB 2? Is F0 error cleared ? Job is complete.
  • Page 322 Error Code Coolinf Fan OZ (OZFAN) Concerned Part Confirm the connection of a fan motor connector. Connect them properly. Is ECN5 of IOD2 properly connected with a connector of the fan motor ? Is ECN1 of IOD2 properly connected with 12CN of MCTL PWB 2 ? Is F2 error cleared ? Job is complete.
  • Page 323 Error Code Cooling Fan (EX) 2 (HTFAN) Concerned Part Confirm the connection of a heater fan connector. Connect them properly. Is DCN14 of IOD1 properly connected with a connector of the heater fan ? Is DCN1 of IOD1 properly connected with 11CN of MCTL PWB 2? Is F4 error cleared ? Job is complete.
  • Page 324 Error Code Concerned Part High Voltage Unit (HVU) Confirm the status of a charger unit. Is the charger unit properly installed ? Re-install the charger unit. Is a corona wire cut or shorted ? Replace the charger unit or belt cartridge. Confirm the connection of high voltage wiring.
  • Page 325 H0 (wire cut/ short error of thermistor) Error Code Fusing Unit Concerned Part Confirm the connection of a fusing unit connector. Is the fusing unit properly installed ? Re-install the fusing unit. Replace the charger unit or belt cartridge. Is there any contact failure due to damaged connector of fusing unit ? Are the connectors properly connected between the fusing unit Connect them properly.
  • Page 326 H2,H3,H4 Error Code Fusing Unit and Others Concerned Part Confirm that a fusing heater is lit. Confirm the wiring and connector of the heater. Is the fusing heater controlled for On/Off. Confirm the input voltage. Connect them properly. Is the line voltage to be the default value ? Is the connector HP/HN connected ? Confirm the rating and replace Is the fuser unit properly installed ?
  • Page 327 Error Code L1 (Beam Detecting Error) Concerned Part Scanner Unit Confirm the connection of an scanner unit connector. Is the connector PDCN properly connected ? Connect the connector properly. Are the connector LCN1 and LCN of MCTL properly connected ? Is L1 error cleared ? Replace the scanner unit.
  • Page 328 Error Code Scanner Unit Concerned Part Connect the connector properly. Is the connector LCN3 properly connected ? Is L2 error cleared ? Replace the scanner unit. Is L2 error cleared ? Replace the MCTL PWB 2. Job is complete. MCTL SCMCLK Scanner Unit SCMRDY...
  • Page 329 Error Code Scanner Unit Concerned Part Confirm the connection of an scanner unit connector. Connect the connector properly. Is the connector LCN3 properly connected ? Is the connector PDCN properly connected ? Are the connector LCN1 and LCN properly connected ? Is LL error cleared ? Replace the scanner unit.
  • Page 330: Image Failure

    IMAGE FAILURE (9)-a (9)-b (10) (11) (12) (13) (14)
  • Page 331 (15)-a (15)-b (16) (17) (18) (19) (20) (21) (22) (23) (24) (25) (26) (27) (28) Fig.8-2...
  • Page 332 Background Phenomenon Background is smeared due to toner spread as shown in print sample (1) of Fig.8-2. Main Causes 1) Too small toner mass and charging level in the developing process. 2) Poor contact of the developer roller’s bias pole. 3) Life expired or failure of the OPC belt cartridge.
  • Page 333 Jitter Phenomenon Uneven optical density appears periodically in the horizontal direction on the printed image as shown in print sample (3) of Fig.8-2. Main Causes Failure of main motor. 1) Irregular rotation of the drive motor. 2) Failure of the gears. 3) Variation of OPC belt running speed due to above reasons.
  • Page 334 Wrinkle / Image Migration Phenomenon Banding shadows of different optical density appear due to wrinkle, image migration and color misregistration occurring on the print paper as shown in print sample (5) of Fig.8-2. Main Causes 1) Print paper other than the recommended paper is being used. 2) The paper discharger unit of the transfer unit 2 is not functioning.
  • Page 335 White Line (1) Phenomenon Vertical white line appears in the specific color area when test-printed in the four color mode (Stripe Mode), as shown in print sample (6) of Fig.8-2. Main Causes 1) Foreign particles adhering to the following places around the developer roller. (Refer to Fig.8-8.) Between the cartridge cover and developer roller (a) On the surface of the developer roller (b)
  • Page 336 White Line (2) Phenomenon Vertical white line appears from the leading edge to the trailing edge of the printed image as shown in print sample (7) of Fig.8-2. Main Causes The dustproof glass of the optical unit 2 is smeared with toner or foreign particles. Countermeasures Clean the dustproof glass.
  • Page 337 Black Line / Blur in the Image Phenomenon Fine black line or blur appears in the printed image as shown in print sample (9) of Fig.8- Main Causes 1) The corona wire of the charger unit is dirty. 2) OPC belt surface is damaged. 3) Foreign particles (paper dust, etc.) are stuck between the cleaning blade and OPC belt.
  • Page 338 I-11 Vertically Staggered Image Phenomenon Printed image staggered in the vertical direction as shown in print sample (11) of Fig.8-2. Main Causes 1) Shock or vibration applied to the printer. 2) Failure of the optical unit 2; Vibration from rotation of the scanner motor. Countermeasures 1) Do not apply shock or vibration to the printer body.
  • Page 339 I-13 White Band Phenomenon White banding line appears in the horizontal direction, and consequently causes a missing image as shown in print sample (13) of Fig.8-2. Main Causes 1) Installation failure of the transfer unit 2, and deformation of the transfer roller 2. 2) Contact failure of the transfer roller 2 bias pole.
  • Page 340 I-14 Toner Drop Phenomenon Toner spot stain is caused on the print by toner dropping within the printer engine as shown in print sample (14) of Fig.8-2. Main Causes 1) Toner drops onto the transfer drum 2 due to the breakdown of the waste toner feeder. 1-1) Mylar of the waste toner feeder is deformed.
  • Page 341 I-15 White Spot / Black Spot Phenomenon White spots and black spots appear on the print as shown in print sample (15) of Fig.8-2. Main Causes 1) Foreign particles adhering to the OPC belt or transfer drum 2. 2) The OPC belt or transfer drum 2 is damaged. 3) Foreign particles mixed in the toner.
  • Page 342 I-17 Color Misregistration Phenomenon Color misregistration is caused between two colors as shown in print sample (17) of Fig.8-2. Main Causes 1) The OPC belt cartridge is not properly installed. 2) The OPC belt cartridge is deformed. 3) The cleaning brush of the drum cleaner 2 is unstable in operation. 4) Rotational load on the OPC belt cartridge is excessive.
  • Page 343 I-19 Mottle Phenomenon Variation of the scanning density is found in the image as shown in print sample (19) of Fig.8-2. Main Causes 1) The transfer unit 2 is not fixed in place. 2) Assembly of the transfer roller 2 is inaccurate. 3) THV output of high voltage unit is not normal.
  • Page 344 I-21 Insufficient Gloss Phenomenon Gloss of the print is not sufficient as shown in print sample (21) of Fig.8-2. Main Causes 1) The fuser cleaner is stained. 2) The fusing roller 2 is deteriorated. Countermeasures 1) Replace the fuser cleaner with a new one. (See Section 3.1 of Chapter III.) 2) Replace the fusing unit with a new one.
  • Page 345 I-23 White Print Phenomenon A blank page (no print at all) is output or a specific color is missing (not printed) as shown print sample (23) of Fig.8-2. Main Causes 1) Laser light path is blocked by paper or other material stuck at the opening of the optical unit 2.
  • Page 346 I-25 Vertical Smear Phenomenon Printed image is smeared vertically as shown in print sample (25) of Fig.8-2. Main Causes 1) Paper dust between the cleaning blade and OPC belt. 2) Debris adhering to the base of a toner cartridge’s developer roller where it contacts with the OPC belt.
  • Page 347 I-27 Color Missing Phenomenon Color is missing in the printed image as shown in print sample (27) of Fig.8-2. Main Causes Fusing failure due to using damp paper or using the printer under high humidity conditions. Countermeasures 1) Use the paper immediately after open the paper bag. 2) Change the NVRAM setting.
  • Page 348: Appendix A

    APPENDIX A SERIAL NO. DESCRIPTIONS The descriptions as below shows how to read labels on each place. < ID for production month of Printer > January September February June October March July November April August December < ID for production month of other parts than the printer > January September February...
  • Page 349 Toner Cartridge 1 2 X X X X X X X X X X MONTH YEAR SERIAL NO. <Location> OPC Belt Cartridge 1 2 X X X X SERIAL NO. MONTH YEAR <Location>...
  • Page 350 Fusing Unit XXXX 7 1 2 3 A REV.(-, A - Z) DATA MONTH YEAR VOLTAGE (100V, 120V, 240V) <Location> Scanner Unit 7 1 2 3 A REV.(-, A - Z) DATE MONTH YEAR <Location>...
  • Page 351 Transfer Drum (Hand-writing) X X X X X X - 7 1 2 3 DATE MONTH YEAR SERIAL NO. <Location>...
  • Page 352 DIAMETER / CIRCUMFERENCE OF ROLLERS The diameter or circumference of each roller is listed below; Parts Name Diameter (Circumference) OPC Belt (380 mm) Developer Roller 18 mm (56.52 mm) Transfer Roller 20 mm (62.80 mm) Paper Pick-up Roller 40 mm (125.60 mm) Transfer Drum 121 mm (379.94 mm) Back-up Roller...
  • Page 353: Shelf Life Of Each Consumable

    SHELF LIFE OF EACH CONSUMABLE Each consumable follows has its own shelf life. Shelf life varies whether the package of consumable is unpacked or not. Consumable Before unpacking *1 After unpacking *2 Toner cartridge (all colors) 3 years 1 year OPC belt cartridge 3 years 1 year...
  • Page 354 CONSUMABLES REPLACEMENT Each consumable follows should be replaced according its own life. Toner Cartridge Life: K = 12,000 pages, CYM = 7,200 pages Condition: Above figures are based on 5% coverage. Life is detected by the toner empty sensor. Note: Life of the starter toner cartridge is half of the above figures.
  • Page 355 <40,020> 3) Add 20 pages Add figure of Figure from <Next care information 32> <Total pages 34> Modified by the addtional life deleted figure <40,000> <40,000> 1) No change This figure is actual <39,990> 2) 10 pages next care time 1) Print 10 pages 2) Print 10 pages This difference is the actual...
  • Page 356 HOW TO RE-ENTER ORIGINAL DATA TO THE MCTL PWB 2 CAUTION Actions 1) and 2) MUST be carried out BEFORE the MCTL PWB 2 is removed or the NVRAM initialized otherwise ALL READINGS WILL BE LOST. Go into the Engine Controller Mode. (Refer to Section 3 “ENGINE CONTROLLER MODE”...
  • Page 357 Re-enter the FC ROLL (NC2) value as follows; i) Enter the value of NC2 - LP2 into the TOTAL PAGE counter. Ÿ (i.e.) NC2 - LP2 12,050P - 12,000P = 50 Enter the value ‘50’ in the TOTAL PAGE counter. ii) Perform CLEAR CARE 2.
  • Page 358 iii) Check that the value of NEXT CARE is reset correctly. (i.e.) NC8 = 39,684P iv) Reset the LIFE PERIOD counter in FACTORY MODE to 60,100. Re-enter the 120K KIT (NC9) value as follows; i) Enter the value of NC9 - LP9 into the TOTAL PAGE counter. (i.e.) NC9 - LP9 = 120,000 - 120,000 = 0 Enter the value ‘0’...
  • Page 359 RE-PACKING INSTRUCTIONS PRECAUTION When re-packing the printer before shipping, be sure to follow the steps and cautions below. Failure to do so will cause toner or oil spill in the printer and severe damage to the printer. Toner Cartridge 1) Open the front cover 2 and remove Protective cover all the toner cartridges (K, Y, M, C) from the printer.
  • Page 360 OPC Belt Cartridge 1) Open the top cover ASSY 2 and remove the OPC belt cartridge from Shutter the printer. 2) Open the shutter on the OPC belt cartridge and remove toner in the cartridge with a vacuum cleaner. 3) Cover the OPC belt cartridge with the original protective sheet (black).
  • Page 361 Fusing Unit 1) Open the rear access cover and slacken the fusing unit securing screws Fusing unit (2 pcs.) 2) Holding the handles at both ends of the fusing unit and remove the fusing unit from the printer. 3) Remove the oil bottle and the fuser Oil bottle cleaner from the fusing unit and put Fuser cleaner...
  • Page 362 Waste Toner Pack 1) Remove the waste toner pack from the printer. 2) Clean toner around the pack and cover Waste toner pack the hole of the waste toner pack firmly with gummed paper tape. 3) Put the waste toner pack into the polyethylene bag and seal it firmly.
  • Page 363 2) Drum cleaner 2 Handle i) Remove the cleaner cover by releasing the two hooks. Drum cleaner 2 ii) Holding the handle located on the top of the drum cleaner 2, push it backwards. iii) Remove the drum cleaner 2 by lifting it out.
  • Page 364 Be sure not to damage the surface of the transfer drum 2 with a vacuum cleaner when cleaning the areas around the transfer drum 2. Be sure not to contact the nozzle of the vacuum cleaner with the terminals of the interior.
  • Page 365 2) Check the following items are packed in the starter kit packing; Four toner cartridges (K, Y, M, C), OPC belt cartridge, Oil bottle, Fuser cleaner. (Refer to the figure as shown on the right.) Toner cartridge OPC belt 3) Put the printer into the polyethylene cartridge bag.
  • Page 366 6) Fix the four joints, then band the P.P band box with two plastic bands. Joint A-19...
  • Page 367: Hidden Function Menu

    HIDDEN FUNCTION MENU Line Test Menu Hold down the + and - buttons and turn the print ON LINE TEST ----- < Press the Go button > Item Descriptions LCD TEST All columns of the LCD are turned on to check that the LCDs are all displayed correctly.
  • Page 368 Professional Menu The professional menu is open to users as per request to customize the printer functions mainly. To enter the professional menu, press the Go and Set buttons together. The details for each menu are described as follows; TRAY SETTING TRAY PRIORITY ----- T1>T2(>T3), (T3>)T2>T1 Specifies the priority of the paper source when selecting ‘Auto’...
  • Page 369 RESET SETTINGS RESET SETTING1 Sets the current printer setting to the user setting 1. SAVE SETTINGS SAVE SETTING1 Saves the current printer setting to the user 1. SAVE FONT (Only when selecting the LaserJet emulation.) PRIMARY FONT Saves the fonts to be currently registered as the primary font into the storage device (compact flash card, hard disk).
  • Page 370 SPOOL PRINT Specifies the collated printing when implementing reprint (secure print, proof print, public print). COLLATE = ON* COLLATE = OFF TRAYCOMMAND MODE Makes the command to select the paper source compatible with HP LaserJet 3. TRAY COM. = NORM * HP LaserJet 4 command TRAY COM.
  • Page 371 (The print speed is decreased.) DLFNT Bd / It Brother has an original function such that the printer creates the bold font when receiving the command of the bold font which the printer does not have. If the download font is selected by ID, however, the bold font which has been specified before can remain in the printer so that the download font is printed in bold.
  • Page 372 OEM FONT SELECT The special character set is necessary when the printer is supplied to the European countries. For the HL-1260 printer, the special character set is stored into the program ROM additionally. Since the font number is moved due to the addition, the character set is disabled for the normal model.
  • Page 373 The priority in each setting is as follows; < When the printer resolution is 600dpi > 3B PRIO = LOW 3B PRIO = HIGH 1. DOWNLOAD 600 1. DOWNLOAD 600 2. DOWNLOAD SCALABLE 2. DOWNLOAD 300 3. CARD 600 3. DOWNLOAD SCALABLE 4.
  • Page 374 PAPER&TRAY SIZE Specifies the default paper size. DEF PAPER =LT The default paper size is letter for the US and Canada models. DEF PAPER =A4 The default paper size is A4 for the other models. PARALLEL MENU Changes the signal timing of the Centronics interface PARALLEL TIMING CDCC PSW = L The BUSY signal gets high when the STROBE signal...
  • Page 375 APPLETALK AT/PS Specifies that the emulation is switched to the PS mode forcedly with AppleTalk. APPLE TALK = PS* Switches the emulation to the PS mode with AppleTalk. APPLE TALK = AUTO Uses the auto emulation function with AppleTalk. PS BINARY SELECT Specifies that the data from the parallel interface is handled as the binary data.
  • Page 376 PROTECT OFF MODE Specifies the performance of the page protection function. PRO.OFF = AUTO* Protects the data spuriously even when the page protection is turned off. (Countermeasure for the memory full or print overrun error.) PRO.OFF = NORMAL Specification up to the 4 mask ROM.
  • Page 377 JOB TIMEOUT SEL Specifies the setting of the job timeout. Though the job timeout has been set to 5 minutes in the PJL emulation since the HL- 1260 printer, the setting to disable the timeout is added due to the user’s request. TIME OUT = ON* Enables the job timeout.
  • Page 378 Reset Parts Life The Reset parts life menu is implemented when the service personnel replaces the periodic maintenance parts. For the parts to be replaced easily, however, it is assumed that the user replaces them by him/herself. Therefore the reset parts life menu is distinguished from the service menu described in the next section, ‘4.
  • Page 379 Service Menu The service menu provides the printer information for the service personnel. (The following descriptions are not open to other than the service personnel.) To enter the service menu, press the + and Set buttons in this order while holding down the Go button.
  • Page 380 PRINT PAGES Number of printing pages depending on the paper size. (Counted up to 100K.) A4 PAGE The number of printing pages of the A4 size. LETTER PAGE The number of printing pages of the letter size LEGAL PAGE The number of printing pages of the legal size B5 PAGE The number of printing pages of the ISO B5 size JISB5 PAGE...
  • Page 381 --SERVICE MENU-- RESET COUNT COVER AGE Clears the average coverage of the cyan, magenta, yellow and black toner. Caution 1 The counter is limited for the following items; COVERAGE : The number of pages over 100K is not stored. PRINT PAGE : Counted up to 100K pages.
  • Page 382: To Install The Printer Correctly

    TO INSTALL THE PRINTER CORRECTLY Please read the installation steps described below carefully. If the printer is not installed correctly, image failures may occur or the life expectancy of the OPC belt cartridge may be shortened. Turn ON the power switch of the printer. After the printer has initialized, open the front cover 2 and then the top cover ASSY 2 of the printer and pull up the OPC belt cartridge from the printer.
  • Page 383 If the gap is NOT in the range of 5 ± 2 mm, check the following items; Note: If the printer is inclined at 1° as shown in the figures below, the printer is approximately 9mm out of level from one side to the other. i) Is the printer inclined because the table the printer is installed on is unlevel? Level 1°...
  • Page 384 iv) Is there anything under the printer, or is there something stuck to the printer base? After checking these items, initialize the printer again (opening/closing the top cover automatically initializes the OPC belt cartridge), and measure the gap on the OPC belt cartridge again.
  • Page 385 ii) When the gap is less than 3 mm; (the OPC belt has moved to the left.) Place something 1 cm thick such as a book under the left hand side of the printer as shown in the figure on the right.

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