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Hitachi SL1 Maintenance Manual

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MANUAL NO. :
MAINTENANCE MANUAL
FOR
HITACHI COLOR LASER PRINTER
MODEL SL1
Hitachi, Ltd.
Tokyo, Japan
February, 27 , 1998
Read & Keep This Manual
• Read the safety instructions carefully, and understand the contents before starting the
maintenance Work.
• Keep this manual always available for reference.

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  • Page 1 MANUAL NO. : MAINTENANCE MANUAL HITACHI COLOR LASER PRINTER MODEL SL1 Hitachi, Ltd. Tokyo, Japan February, 27 , 1998 Read & Keep This Manual • Read the safety instructions carefully, and understand the contents before starting the maintenance Work. • Keep this manual always available for reference.
  • Page 2 Revision Control Table Date of Revision Revision Code Description of Revision July 14, 1997 First Edition First Edition (Original) October 13, 1997 Revision “A” First revision made and issued as Rev.”A” February 27, 1998 Revision “B” First revision made and issued as Rev.”B”...
  • Page 3 FCC Notice WARNING This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of FCC Rules. These limits are specified to provide the reasonable protection against harmful interference in a residential installation. Since this equipment generates, uses, and radiates the radio frequency, it may cause harmful interference to the radio communications if not installed or used in accordance with the instructions set out hereunder.
  • Page 4 Ozone Gas Caution SL1 is provided with the ozone filter in order to reduce exhausted ozone in compliance with Product Safety Standards. Ozone filter must be replaced with new filter yearly, otherwise, it may cause strong odor which will likely have ill effects to bronchial tubes.
  • Page 5 SAFETY INSTRUCTIONS 1. Safety Instructions 1.1 Safety Principle (1). Before starting your operation, read this Manual thoroughly. Especially, read the safety instructions of this section carefully and understand the contents. (2). Perform all the operations by following the procedures described in this Manual.
  • Page 6 (1). Introductory Information (..continue) . Understanding Signal Words DANGER is used to indicate the presence of a hazard which will cause severe human injuries or fatal accident if the warning is ignored. WARNING is used to indicate the presence of a hazard or unsafe practices which may cause severe human injuries or fatal accident if the warning is ignored.
  • Page 7 . Follow Safety Instructions (..continue) WARNING HARMFUL OZONE GAS Inhalation of excessive amount of ozone gas may adversely affect the respiratory organs. Ozone Filter is provided to this printer to reduce the exhausted ozone. This filter must be replaced with new filter periodically in accordance with the Manual attached to this printer.
  • Page 8 . Follow Safety Instructions (..continue) CAUTION HAZARDOUS POWDER Toner is fine powder to cause powder explosion if dumped into the fire. Strictly refrain from dumping toner into the fire for disposal. CAUTION HAZARDOUS POWDER Toner is fine powder to cause troubles to eyes and respiratory organs if inhaled.

  • Page 9: Table Of Contents

    CONTENTS PREFACE and SAFETY INSTRUCTIONS 1. OUTLINE OF PRODUCT 2. SPECIFICATIONS OF PRODUCT 3. INSTALLATION 4. STRUCTURE OF EACH COMPONENT SYSTEMS 5. PERIODIC MAINTENANCE 6. OPERATION AND ADJUSTMENT OF OPERATOR PANEL 7. REPLACEMENT OF MAINTENANCE PARTS 8. TROBLESHOOTING 9. PARTS LIST...
  • Page 10 1. Outline of Product ......1-1 1.1 Name & Function of Each Parts ....1-1 1.2 Internal Structure .

  • Page 11: Outline Of Product

    1. Outline of Product 1.1 Name & Function of Each Parts Top Cover Operator Panel Paper Exit Cover Main Switch Front Cover Paper Cassette [Front Face] Paper Exit Unit Interface Connector Box Back Cover(L) AC Input Inlet [Back Face]...
  • Page 12 Name of Parts Outline of Functions To act as an upper enclosure and also a paper tray Top Cover for printed papers. To display a status of printer operation and Operator Panel motion. To act as a front enclosure, and to be opened Front Cover when replacing a toner cartridge or waste toner pack.

  • Page 13: Internal Structure

    1.2 Internal Structure Fusing Unit Belt Cartridge Drum Cleaner Toner Cartridge @(K,Y,M,C) Transfer Unit Paper Discharger Optical Unit Transfer Roller Transfer Drum Paper Cassette Paper Pick Up Roller Name of Components Outline of Functions To contain the toners (K, Y, M, C) for developing. Toner Cartridge Each toner cartridge of K,Y, M, C is independent.

  • Page 14: Description Of Operator Panel

    1.3 Description of Operator Panel (1) Standard ‘ a b c d e f g h i j k l m n o P Q R S T U V W X O P Q R S T U MESSAGE ONLINE MEDIA FREE SIZE...
  • Page 15 2. Specifications of Product ......2-1 2.1 Rating ........2-1 2.2 General Specification .

  • Page 16: Specifications Of Product

    220 - 240 50/60 Not included. *1 SL1-J 50/60 1 (Standard) *1: As to SL1-E, customers are requested to purchase and use the power cord complying with the following specifications. Figure Name of Model Rating Approval Agency Applicable Area VDE, OVE, SEMKO, CEBEC, Europe H05VV-F3G0.75 250VAC, 6A...

  • Page 17: General Specification

    2.2 General Specification Item Description Printing Method Semiconductor Laser and Electrophotography Print Speed Cassette Feed and Continuous Print: a). Monochrome a). 16 sheets per minutes (Letter size) b). 2 (two) Color b). 8 sheets per minutes (Letter size) c). 3 (three) Color c).
  • Page 18 Table 2-1: Characteristics of Hitachi Paper Item Description Basis Weight (g/m 82 5 Thickness ( 95 6 Smoothness (Bekk) 90 20 (seconds) Stiffness (Clark) 100 15 Brightness (%) 85 2 Surface Resistance ( Grain Direction Long Measurement Condition: 17.5 27.0...
  • Page 19 Table 2-2: Characteristics of Hitachi Recommend Paper, OHP Sheet, and Label Paper Paper Hammermill Label Media SPHINX OHP Sheet Item Auto Fil #1914 Xerox 4024 Laserprint (white) Avery 5260 Basis Weight (g/m 75 4 90 4 163 7 142 4...

  • Page 20: Environmental Condition

    2.3 Environmental Condition (1). Ambient Temperature / Humidity / Altitude: (a). Under Operation: 10.0 32.5 , 20 80%RH (See the figure below.) Recommended Condition; 17.5 70%RH 17.5 20 27 30 32.5 40 Ambient Temperature ( ) C (b). Under No Operation: 5.0 ~ 35.0 , 10 ~ 80%RH (See the figure below.) Ambient Temperature(...
  • Page 21 (c). Storage and Transportation Environment of Printer The following defines the storage and transportation environment of the printers that have been packed according to Hitachi specification. However, this section does not cover the belt cartridges, toner cartridges and developer cartridges.
  • Page 22 3. Installation ........3-1 3.1 Conditions for Installation ....3-1 3.2 Unpacking .

  • Page 23: Installation

    Installation 3.1 Conditions for Installation Laser beam printer is likely influenced by the environment of set-up location. IF Printer was set up at the inappropriate location, the printer may not perform the characteristic functions as expected. Therefore, the following factors should be taken into consideration prior to deciding where to set.

  • Page 24: Unpacking

    3.2 Unpacking WARNING •The package containing a printer weighs approximately 40kg, so that it is too heavy for one person to carry. It needs more than two adults to move the printer. Since this printer is a precision machine, ensure to carry it slowly with good care so that no impact shall be given to the printer while moving.
  • Page 25 NANE OF PARTS Q’TY OUTER BOX BASE UPPER PACKING SILICA GEL (EN) POLYETHYLENE BAG (EN) POLYETHYLENE BAG (ST) ST KIT TAPE TAPE PR TAPE STARTER KIT PACKING (U) STARTER KIT PACKING (L) SILICA GEL (ST) POLYETHYLENE BAG (T) POLYETHYLENE BAG (CL) POLYETHYLENE BAG (OIL) POLYETHYLENE BAG (OPC) JOINT...

  • Page 26: Unpacking Of Starter Kit

    3-2-2 Unpacking of Starter Kit Procedure of Unpacking . Open up the vinyl sheet covering the starter kit. . Confirm all of the following kits to be inside the starter kit's packing box. Name of Kit Appearance Quantity Y (Yellow) M (Magenta) Toner Cartridge C (Cyan)

  • Page 27: Installation Work

    3.3 Installation Work Install the unit parts of starter kit to the printer according to the following procedures: 3.3.1 Installation of OPC Belt Cartridge: (Fig.3-3 ~ 3-6) PRECAUTION Do not directly touch the OPC belt surface with bare hands or gloves. If OPC belt is exposed for more than two minutes under the light of 800 lux, the belt may be defective.

  • Page 28: Installation Of Toner Cartridge To The Printer

    . Push new belt cartridge along the Lock Lever BC guide of both sides into the printer. Guide . Set the lock lever BC. . Close the paper exit cover. . Close the front cover. [Fig.3-6] 3.3.2 Installation of toner cartridge to the printer: (Fig.3-7~3-9) Caution Refrain from holding a toner cartridge vertically, otherwise, it may adversely affect the print quality.

  • Page 29: Installation Of Cleaning Roller And Oil Bottle

    3.3.3 Installation of Cleaning Roller and Oil Bottle:(Fig.3-10 ~ 3-13) Procedures of Installation Paper Exit Cover . Open the paper exit unit. Fusing Unit [Fig.3-10] . Open the retainer lock lever of oil bottle and the cleaning Fusing Oil Bottle roller.

  • Page 30: Test Run And Test Print

    3.3.4 Test Run & Test Print (1). Power-On & Off ( i ). Power-On: There is mark on the power supply switch located on the side panel of the printer. represents the power supply switch with push-on/push-off function. Prior to connecting a power cable, confirm that the push button top of power supply switch located at the lower...
  • Page 31 (ii). Power-Off: Push the push button top of power supply switch in order to shut off the power supply to the Power Supply Switch printer. (This switch is push-on/push-off type. ) Unplug the power supply cord from the inlet. (iii). Precaution while power-on & off operation: PRECAUTION Prior to unplugging the power supply cord, confirm that the main switch located on the side panel of printer is set to the Push-Off.
  • Page 32 ). Test Print After power-on, confirm the normal printing by test printing according to the following procedures: ( i ). Procedure of Test Print Step Operation Details of Operation Upon completion of the warming-up process, Power-On printer is ready to print and waits for PRINT signal.
  • Page 33 (ii) Test Print Procedures Implement the test print according to the following procedures upon completion of the warming-up process. Procedure Indication of Operator Panel Warming-up process is completed. READY U : [ ] L : [ Press ONLINE key so that display changes from screen SERVICE MODE (a) to (b).
  • Page 34 (iii). Selection of Media Pressing the media select key on the operator panel, select the suitable process for the media to be used. When the media select key is pressed, the media lamp changes as follows: Condition of Media Lamp Selected Media Lit Out Ordinary Paper...
  • Page 35 (3). On-Line Print Upon confirmation of normal printing by the test print mode, proceed with the On-Line Print according to the following procedures. However, since this Operator Manual does not refer to the connection method of Interface, or the operating method of Host side, make sure to read the operation procedure of the Host prior to starting the On-Line Print.

  • Page 36: Structure Of Each Component Systems

    4. Structure of Each Component Systems 4.1 Basic Structure................4-1 4.1.1 Print System and Transfer System ........4-6 4.1.2 Optical System...............4-24 4.1.3 Paper Transportation System ........4-26 4.1.4 Fusing Unit ..............4-28 4.2 Structure of Control System.............4-30 4.2.1 Basic Structure ..............4-30 4.2.2 Operation of Control System ........4-40 4.2.3 DC Power Supply Unit...........4-50 4.2.4 High Voltage Power Supply Unit........4-53 4.2.5 General Wiring Diagram ..........4-55...

  • Page 37: Basic Structure

    4. Structure of Each Component Systems 4.1 Basic Structure (1). Mechanical & Electrical Structures This laser beam color printer (hereinafter called "Printer") consists of the five engineering systems such as Print, Transfer, Optical, Paper Transport, and Control System. Printer runs a color printing through the interactive operations of above five systems as shown in Fig.
  • Page 38 Main Motor Developer Motor I/F Controller Paper Exit Paper Exit Unit Drum Cleaner Unit Toner MCTL Fuser Unit Cartridge I/F Control OPC Belt Drum Cleaning Sequence Control Operation Development Laser Control Transfer Drum Paper Discharger Transfer Unit First Transfer AC Discharger Unit Transfer Roller Second Transfer Optical Unit...
  • Page 39 . Control System Control system consisting of the following 4 (four) control parts runs the printer by processing the interface signals transmitted from the Host and each systems such as the print, transfer, optical, transport system. •Sequence Control •Laser Control •Fusing Temperature Control •Interface Control (2).
  • Page 40 OPC Belt Toner Cartridge Transfer Drum Fig4-3 Toner C C C M M M Y Y Y C C Y Y Y . First Transfer Transfer Drum Y Y Y Y Y Y M M M C C C C C .
  • Page 41 (3). Structure of OPC Belt OPC belt consists of the surface layer having a photoconductor (OPC) of organic material, the inner layer of an insulator material (PET), and the aluminum deposit layer in between. OPC belt is located as shown in Fig.4-5 as a main part of the print system.

  • Page 42: Print System And Transfer System

    4.1.1 Print System and Transfer System Fig.4-7 shows the basic structures of the print system having OPC belt as a main part, and the transfer system having the transfer drum. Color print is made by actuating the each processes in the print system and transfer system. 1 @ @ @ C hargimg 2 @ @ @ E xposing 6 @ OPC Belt Cleaning...
  • Page 43 ) Structure of Printer Name of Component Part Process Charger Charging Optical Unit Exposing Toner Cartridge Developing Belt Cartridge Receiving of Image Transfer Drum Transferring of Image Belt Discharger Erase Lamp Discharging of Belt Cleaning Blade Cleaning of Belt Transfer Roller Transferring Paper Discharger Discharging of Paper...
  • Page 44 ( ) Basic Structure of Printing System Toner image is formed through the potential of OPC belt varying in each process of the charger, exposure, development, transfer and cleaning. . Process of Print System (See Fig.4-8-a) (i ). OPC belt is biased to the voltage -CBV(V) by the power supply CBV. (ii).
  • Page 45 Cleaning UNIT FCBV Fuser Unit Toner OPC Belt Toner Cartridge Develop Paper Discharger Transfer Drum ACHV Transfer Roller Optical Unit THV (+) Charger Cleaning THV ( - ) Brade Paper Erase Lamp Fig.4-8-a: Basic Structure of Print System...
  • Page 46 Process Transfer Drum Toner - CBV Toner OPC Belt Dev. roller 1 F Charging Process 2 F Exposing Process 3 F Developing Process Charger 4 F Transfering Process 5 F Cleaning (Erase) F Power Supply for OPC Belt Bias F Power Supply for Charging F Power Supply for Dev.
  • Page 47 ( ) Details of Each Process 1 Charging Charging Process means that OPC belt is evenly charged by the charger. (1). Structure of Charger Unit (Fig.4-7 and Fig.4-9) . Charger unit is located as shown in Fig.4-7. . Charger unit consists of the case, corona wire and grid. .
  • Page 48 2 Exposing Exposing Process means that OPC belt surface is exposed to the laser beam to form an electrostatic latent image. (1). Structure of Optical Unit . Optical unit is located as shown in Fig.4-7. . Luminous source of laser beam is a semiconductor laser. .
  • Page 49 3 Developing Developing Process means that an electrostatic latent image on OPC belt is made visible with toner. (1). Structure of Toner Cartridge (Fig.4-7) . Toner cartridge is located as shown in Fig.4-7. . Four toner cartridges are made available from the top to bottom in the order of specified color as black, yellow, magenta and cyan.
  • Page 50 OPC Belt Toner Cartridge Dev.roller Toner Toner Toner Fig.4-12 D e v. r o l l e r (-CBV)+(-DBV) T on er (-CBV) OP C B e l t F i g . 4 - 1 3 Toner(M) Exposing Developing Fig.4-14 4-14...
  • Page 51 First Transfer (Drum) First Transfer Process means that toner images on the OPC belt is transferred onto the transfer drum. (1). Structure of Drum Transfer (Fig.4-7) . First transfer part is located as shown in Fig.4-7. . Material of the drum is aluminum. .
  • Page 52 (2). Process of First Transfer (Fig.4-17) . OPC belt that has been through the development process rotates as contacting and synchronizing with the transfer drum. . OPC belt has been biased to the potential of -CBV(V). Potential of the transfer drum is nearly GND. .
  • Page 53 5 Belt Discharging (Erase Lamp) Belt Discharging Process means that upon completion of the drum transfer process, LED light is radiated on the OPC belt prior to cleaning the belt to discharge the residual charge for electrical cleaning. (1). Structure of Erase Lamp .
  • Page 54 6 Belt Cleaning Belt Cleaning Process means that the residual toner adhering to the OPC belt surface is mechanically scavenged. (1). Structure of Belt Cleaning . Blade for the belt cleaning is located to the belt cartridge as shown in Fig.4-7. (2).
  • Page 55 7 Second Transfer (Paper) Second Transfer Process means that the toner image on the transfer drum is transferred onto the transported paper. (1). Structure of Belt Cleaning . Transfer roller for the second transfer is located as shown in Fig.4-7. .
  • Page 56 Paper Discharger Transfer Drum Transfer Roller Toner Image VAC: Power Supply for Paper Paper dischargeing THV: Power Supply for Transfer Roller Bias. Fig.4-20 4-20...
  • Page 57 8 Paper Discharging Paper Discharging Process means that the transported paper on which the transfer has been completed is separated from the transfer drum by applying AC charge to the paper. (1). Structure of Paper Discharge (Fig.4-21) . AC charger unit for discharge of paper is located as shown in Fig.4-7. .
  • Page 58 9 Drum Cleaning Drum Cleaning Process means that the residual toner on the transfer drum is removed. (1). Structure of Drum Cleaning(Fig.4-22) . Drum cleaning unit is located as shown in Fig.4-7. . Drum cleaning brush is a semiconductor type fur brush to clean the surface of transfer drum as rotating.
  • Page 59 Cleaning Roller Cleaning Brush Waste Toner Feeder Residual Toner FCBV Drum Claening Unit Transfer Drum FCBV: Cleaning Roller Power Supply for cleaning Roller Bias Fig.4-22 4-23...

  • Page 60: Optical System

    4.1.2 Optical System This printer employs a semiconductor laser diode as a light source. This laser diode is controlled by the fast switching according to transmitted image data (video signal). The generated laser light scans over the OPC belt through a polygon mirror and lens, by which electrostatic latent images will be formed on the OPC belt.
  • Page 61 (2) Specification : Specification of Optical Unit is described as follows: Item Specification for SL1 Rated Output of Laser 5 mW. Diode Wave Length of Laser Approx.785 nm. Beam 600 dpi. Scanning Density 220 mm. Scanning Width Rotations Per Minutes 23,936 rpm.

  • Page 62: Paper Transportation System

    4.1.3 Paper Transportation System (1). Outline This printer employs the automatic paper feeding with the paper cassette. When toner images are formed on the transfer drum through the operations of print system and transfer system, a paper is fed by the pick-up roller and transported to the registration roller.
  • Page 63 Fig.4-24 1 . Paper Cassete 5 . Paper Discharger Unit 2 . Pick-Up Roller @ @ 6 . Fuser Unit 3 . Resistration Roller 7 . Paper Exit Unit 4 . Transfer Part 8 . Paper Exit Roller 4-27...

  • Page 64: Fusing Unit

    4.1.4 Fusing Unit (Fig.4-25) Fusing Unit employs the thermal fusing system containing the heater in the roller. Papers carrying the toner images pass 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 on the paper.
  • Page 65 (2). Process of Fusing (Fig.4-26) . Silicone oil supplied from the oil bottle is applied to the surface of fuser roller and back-up roller. . Toner image is transferred on the paper, but not yet fused on the paper. . Tansported paper passes between the heater roller and back-up roller. .

  • Page 66: Structure Of Control System

    4.2 Structure of Control System 4.2.1 Basic Structure (1). Electrical System and Function Most of main electrical parts of this printer is controlled by MCTL P.W.B. Structure of Sequence Control Basic structure of the sequence control is exhibited in Fig.4-27. .
  • Page 67 Cooling Scanner Operator Motor Panel Host Computer ATC (4 pcs.) Belt Drum Sensor Sensor Sequential Control Control Laser Control Thermal Control Controller Toner Concentration Control Operator Panel Control Error Clearance Program Cleaning Roller Sensor Paper Sensor High Voltage Unit Paper Feed Sensor Oil Sensor DC Power Paper Empty Sensor...
  • Page 68 Layouts & Functions of Electrical Parts . Print P.W.B. (Fig.4-28) Name Function To control the series of processes of the Printer: Fuser Temperature Control, Laser Output Control, Operator MCTL P.W.B. Panel Indication, Toner Empty Sensing Control, Error Processing Control, Interface Control. To display the Printer's operation status and support Panel Indicator P.W.B.
  • Page 69 Erase Lamp Panel I O D 2 I O D 1 High Voltage Power Supply (HVU) P.W.B. MC TL DC Power Supply (LVPS) P.W.B. L D U Fig. 4 -28 4-33...
  • Page 70 . Motor (Fig.4-29) Name Code Function To drive the OPC belt and the paper Main Motor transport system. To drive the toner cartridge and the Developing Motor developing system. To scan the laser beam. Scanner Motor To exhaust the ozone from printer Ozone Fan Motor OZFAN (charger unit).
  • Page 71 2 . Layout of Motors Ozone Fan Heater Fan Main Motor Exit Cover Door SW. Developing Motor Controller Fan Front Cover Door SW. Back Cover Door SW. Scanner Motor Fig.4-29 4-35...
  • Page 72 . Clutch and Solenoid (Fig.4-30) Name Code Function To feed papers by coupling the feeding Feeder Clutch PCLU roller to the main gear unit at timing of the paper feeding. To transport papers by coupling the registration roller to main gear unit as Registration Clutch RECL synchronized with the rotation of transfer...
  • Page 73 Layout of Clutches and Solenoids Fig.4-30 4-37...
  • Page 74 . Sensors Name Code Function Photo sensor to detect the paper size. Paper Size Sensor Photo sensor to detect the paper is fed Paper Feeder Sensor from the paper cassette. Photo sensor to detect that paper is Paper Exit Sensor exited from the paper exit unit.
  • Page 75 Layout of Sensors 3. Paper Exit Sensor 14. Temperature Sensor for Fuser Unit 7. Drum Paper Jam Sensor 13. Cleaning Roller Sensor 5.Oil Sensor 10. Toner Detecting Sensor 9.Phot Belt Sensor 8. Drum Encoder 12. Developing Photo Sensor 6. OHP Sensor 11.
  • Page 76 4.2.2 Control System (1). Control of Print Process Micro CPU mounted on the MCTL P.W.B. controls the print processes. [Print Sequence Diagram] Cooling Scanner Operator Motor Panel Host Computer ATC (4 pcs.) Belt Drum Sensor Sensor Sequential Control Control Laser Control Thermal Control Controller Toner Concentration Control...
  • Page 77 . Control Block Diagram(Fig.4-32) Name of Control Description To control the print sequence of Sequence Control printer. To control the temperature of fuser Temperature Control unit. To control the toner empty status of Toner Empty Sensing Control each toner cartridges. To control the operator panel indication Operator Panel Control and the operation signals.
  • Page 78 (2). 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.4-33. Operation . When the video signal is inputted, the laser drive control circuit has the laser diode switched on and radiated according to the video signal.
  • Page 79 MCTL P.W.B. OPC Belt PRINT Signal Frequency Control Circuit F - ƒ Lens Scaner Motor Laser Beam Scanning Synchronizie Control Circuit Control Circuit LCD P.W.B. VIDEO Signal Fig.04-33...
  • Page 80 (3) Control of Fusing Temperature Each rollers of the fusing unit are controlled to maintain the appropriate temperature so that toner will be fixed on a print paper. . Basic Structure of Temperature Control(Fig.4-34) : Thyristor to control the on/off operation of power supply to the heat lamp.
  • Page 81 RY-1 ACOFF-P RY-1 HON-N Fusing Unit THERR ACOFF HON GA/CPU Fig 4-34: Basic Structure of Fuser Control...
  • Page 82 : To maintain the set point (temperature) for fusing of toner to be approx.150 appropriate by turning on/off the thyristor. : Reference temperature ( approx.175 ) to identify that it is excessively hot inside the fusing unit. When it reaches to this point, the relay RY turns off, the power supply to the heat lamp is shut down, and the printer stops the operation.
  • Page 83 (b). Interface Connection Operator Panel Laser Printer Controller Hitachi Color Host Laser Printer System (LPC) Fig.4-36: Interface Circuit (Internal Connecting System) Interface connector of the laser printer SL1 is connected to the host system as shown in Fig.4-36. 4-47...
  • Page 84 (c). Interface Circuit (Printer side) Table4.1 Interface Circuit Interface Circuit Name of Signal VIDEO-N VIDEO-P M5M34050 HSYNC-N HSYNC-P M5M34050 PRREQ-N COMMAND-N ID1-N 0.01 F ID2-N SN74LS14 VSYNC-N 3.3K IREADY-N STATUS-N KEY-STATUS-N SN7406 4-48...
  • Page 85 (d). Connector Pin Assignment: Connector type of the Printer side is 128A-064S2B-:13A(DDK) or the equivalent. Table 4.2: Connector Pin Assignment Pin No. Signal Name Pin No. Signal Name PSGND PSGND PSGND PSGND PSGND PSGND PSGND PSGND VIDEO-P VIDEO-N RET(GND) Reserve HSYNC-P HSYNC-N ID2-N...

  • Page 86: Dc Power Supply Unit

    4.2.3 DC Power Supply Unit . Output and Use Output Terminal Rated Output +5V-1 For control of Printer. +5V-1R 5.3V, 7.5A For control of Laser. (8.5A) +5V-2 For control of Interface. +24V-1 +24V, 4.5A For control of Printer charging. 120V, 8A For connection of Fuser Heater (HP).
  • Page 87 ACN1 ACN3 ACN2 Main SW Inret PC Pin Black White Black White Fig.4-37...
  • Page 88 . Connector Pin Assignment ACN1 ACN2 Manufacturer: MoLex Manufacturer: MoLex Type: 53313-2215 Type: 5277-02A Pin#. Signal Name Interface Pin#. Signal Name Interface +24V Output through +5V-1 +5V-1 Output DSW-O Door Switch. Signal Ground +24V Output through SGND DSW-I (+5V type ground) Door Switch.

  • Page 89: High Voltage Power Supply Unit

    4.2.4 DC High Voltage Power Supply Unit . Output and Function Power Supply (P/S) Function Name of P/S Approx.Output Voltage CHV(-) 4.6kV Charging HVRD6190 619V CBV(-) 200V~900V First Transfer DBV(-A) 200V~400V Developing Bias DBV(-B) 200V~400V Second Transfer THV(+) 400V~3,000V Transfer Roller Cleaning THV(-) 600V ACV(...
  • Page 90 2 Layout of Connector Pin Assignment Connector Pin Assignment BCN1 Manufacturer: MoLex Type: 53313-1815 Pin# Signal Name Interface Pin# Signal Name Interface PGND {24v |1 {24V |1 PGND FUCHK Senor Signal of Fuser Unit Installation. PGND PGND ACVON-N AC Output ON Signal PWMON-N PWM Control On Signa CHVON-ON...
  • Page 92 ( 2 æ ^ C v 2 2 s ) EDCN2 FIOD1 ´ | … ‹ d „ ( 22Pins ) FIOD1 P.W.B |Power Supply Unit … … {5v |1 SGND {5v |1 SGND ACSYNC |N SGND {24V SGND {5v |1R ACOFF |P HON |N TESTI2...
  • Page 93 ´ ( 50 s 2 æ ) EECN1 FMCTL |IOD2 ( 20 s 2 æ ) EDCN1 FMCTL ´ |IOD1 ( 50Pins ) ( 20Pins ) FMCTL P.W.B |IOD1 P.W.B FMCTL P.W.B |IOD2 … … … DCL ( C ) ON |P SGND PGND DCL ( M ) ON |P...
  • Page 94 EDCN10 FIOD1 ´ | p t @ EDCN5 FIOD1 | ª J Z b g L ‡ @ @ @ FIOD1 ´ |PT2 @ @ @ FIOD1 | o s1 ( PT2 ) @ @ @ FIOD1 P.W.B |Paper Exit Sensor @ @ @ @ FIOD1 |h ( HTFAN ) ( PEU )
  • Page 95 EECN3 FIOD2 | » SLYMC EECN17 FIOD2 | » N b ‘ Y ( Y ) FIOD2 |Developer Solenoid FIOD2 |Developer Clutch … … {5v |1 {24v |1 TBFL2 |N SGND DCL ( C ) ON |N {5v |1 GHPSEN1 SGND {5v |1 GHPSEN2...
  • Page 96 EACN2 F … ‹ d „ | h A SW ( d ‹^ C v 2 s ) EECN10 FIOD2 | N [ i \ m C h ( 2Pins ) FPower Supply Unit |Interlock Switch FIOD2 |Cleaner Clutch … …...
  • Page 97 ELCN FMCTL |LDU ( 20 s 2 æ ) FMCTL |LDU ( 20Pins ) … {5v |R LDREF2 LDREF3 {5v |1 LDREF1 LDREF0 LREADY LCONT2 LCONT1 VIDEO |P VIDEO |N BDT |P BDT |N SGND SGND SCMCLK SCMRDY |N SCMON |N PGND {24v |1 4-61...
  • Page 98 EDCN8 FIOD1 | ” j b g FIOD1 |Lower Feeder Unit … … {24v |1 {5v |1 PSL1 PKCLLON |N PSL2 PSL3 {5v |1 PSL4 {5v |1 SGND PEL |P PSL1 SGND PSL2 {5v |1 PSL3 … OHPSENL {5v |1 PSL4 PEL |P SGND...
  • Page 99 5. Periodic Maintenance 5.1 General ......... . .5-1 5.1.1 Precaution in Handling .

  • Page 100: Periodic Maintenance

    5. Periodic Maintenance 5.1 General 5.1.1 Precaution in Handling Since a high quality laser printer is a precision equipment, the daily checking and periodic maintenance is indispensable to maintain an expected hig performance. Following is the list of important precautions & action items as to the maintenance and periodic replacement parts: (1).

  • Page 101: List Of Maintenance Tools

    (1). List of Maintenance Tools Table 5-1 below lists up the maintenance tools for the printer. Table 5-1 Name of Tool 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 102: List Of Consumables For Maintenance

    (2). List of Consumables for Maintenance Table 5-2 below lists up the consumables for maintenance. Table 5-2 Name of Tool Parts Code 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)

  • Page 103: Cleaning For Periodic Maintenance

    5.1.2 Cleaning for Periodic Maintenance See Table 5-3 for details of periodic maintenance cleaning to the following parts. (1). Registration Roller (2). Transfer Roller (3). Paper Discharger (4). Belt Cartridge (5). Dustproof Glass of Optical Unit (6). Printer Interior WARNING •...

  • Page 104: Periodic Maintenance

    Periodic Maintenance Cleaning Work Table 5-3 Cleaning Work Cleaning Cycle *1 Time *2 Skill *3 Name of Parts (Condition or Case) (minute) Level Description Page • Defective image 1. Open transfer unit. Registration A,B,or • Smeared paper Roller. 2. Clean rollers and neighbor, using a dry User.
  • Page 105 Periodic Maintenance Cleaning Work Table 5-3 Cleaning Work Cleaning Cycle *1 Time *2 Skill *3 Name of Parts (Condition or Case) (minute) Level Description Page 1. Remove toner cartridge. • Defective print 2. Remove the belt cartridge. Dustproof quality Glass of 5-11 B or C 3.
  • Page 106 (1). Cleaning of Registration Roller Registration Roller shall be cleaned according to the periodic maintenance cleaning cycle set out in Table 5-3. Tools to be prepared . Cotton cloth (Unwoven fabric) (2 ~ 3 pieces) Cleaning Procedures . Turn off the power supply, and unplug the power supply cord. .
  • Page 107 (2). Cleaning of Transfer Roller Transfer Roller shall be cleaned according to the periodic maintenance cleaning cycle set out in Table 5-3. Tools to be prepared . Cotton cloth (2 ~ 3 pieces) Cleaning Procedures . Turn off the power supply, and unplug the power supply cord. .
  • Page 108 (3). Cleaning of Paper Discharger (AC Charger) Paper Discharger shall be cleaned according to the periodic maintenance cleaning cycle set out in Table 5-3. @ AC Charger Transfer Unit i Holder j Tools to be prepared . Cotton cloth (2 ~ 3 pieces). .
  • Page 109 (4). Cleaning of Belt Cartridge Belt Cartridge shall be cleaned according to the periodic maintenance cleaning cycle set out in Table 5-3. WARNING • Do not expose OPC belt to the light of more than 800 luces (ordinary office) for more than 2 (two) minutes. •...
  • Page 110 (5). Cleaning of Dustproof Glass in Optical Unit Dustproof Glass of the Optical Unit shall be cleaned according to the periodic maintenance cleaning cycle set out in Table 5-3. Tools to be prepared . Cotton cloth (2 ~ 3 pieces). .
  • Page 111 (6). Cleaning of Printer Interior Printer Interior (bottom) shall be cleaned according to the periodic maintenance cleaning cycle set out in Table 5-3. CAUTION Prior to cleaning the inside of printer, protect the transfer drum with paper so that the mouth of cleaner will not directly contact the transfer drum. Tools to be prepared .

  • Page 112: Periodic Maintenance Parts And Maintenance Cycle

    5.1.3 Periodic Maintenance Parts and Maintenance Cycle Maintenance Work shall be implemented according to the "Periodic Maintenance Parts and Maintenance Cycle" set out in Table 5-4. 5-13...
  • Page 113 Table 5-4 : Periodic Maintenance Parts and Maintenance Cycle Maintenance Parts Description Cleaning Cycle *1 Time *2 Skill *3 (Condition or Case) (minute) Level Name of Parts Function Clause 50K prints *4 To fix toner image on a 5.2.1 Fuser Unit A or B Maintenance transported paper.

  • Page 114: Periodic Maintenance Procedures

    5.2 Periodic Maintenance Procedures 5.2.1 Replacement of OPC Belt Cartridge (1). Criterion of Replacement OPC Belt Cartridge should be replaced with new READY cartridge at 50,000 images or 12 months whichever U: [ L: [ [ BC ] comes earlier. When time is due for replacement of OPC belt cartridge, the warning code "BC"...
  • Page 115 . Pull out the belt cartridge. Pull out the belt cartridge . Prepare a new belt cartridge. [Fig.5-12] i). Pull and remove the tension release pin. Protective Sheet ii). Remove the protective sheet. Tension Release Pins Belt Cartridge [Fig.5-13] . Push new belt cartridge along the guide into the printer body.
  • Page 116 5.2.2 Replacement of Fusing Unit(Fig.5-16 5-20) (1). Criterion of Replacement Fusing unit should be replaced with new unit READY according to the periodical maintenance cycle U: [ L: [ [ FU ] set out in the Table 7-1. When time is due for replacement of fusing unit, the warning code "FU"...
  • Page 117 . Remove the metal fixture of fusing unit. i) Open the back cover (L). ii) Place a paper on top of transfer drum surface to protect the transfer drum surface. iii). Loosen the set screw of both left and right side so that the hook of metal fixture comes off from the base of fusing unit.
  • Page 118 Sequence of Replacement . Prepare new fusing unit prior to starting the replacement work. . Remove the roller tension-release piece of left and right. . Install the oil bottle and cleaning roller to the fusing unit. Roller tension-release piece Fusing Unit Handle Paper Exit Unit [Fig.5-19]...

  • Page 119: Replacement Of Transfer Roller

    5.2.3 Replacement of Transfer Roller (1). Criterion of Replacement Transfer roller should be replaced with new discharger unit according to the periodical READY maintenance cycle set out in the Table 7-1. U: [ L: [ [ OW ] When time is due for replacement of transfer roller, the warning code "OW"...
  • Page 120 Sequence of Replacement . Release the lock lever of transfer roller by turning Lock Lever it to the arrow direction 'A'. (Fig.5-22-A) . Remove the transfer roller. (Fig.5-22-B & Fig.5-22-C) i ). After lifting up the right end of transfer roller, slide it to the right.

  • Page 121: Replacement Of Paper Discharger Unit

    5.2.4 Replacement of Paper Discharger Unit(Fig.5-23) (1). Criterion of Replacement Paper discharger should be replaced with new discharger unit according to the periodical READY maintenance cycle set out in the Table 7-1. U: [ L: [ [ OW ] When time is due for replacement of paper discharger unit, the warning code "OW"...
  • Page 122 Sequence of Replacement Refer to the item 4.1.2 (3) for the removal of paper discharging unit (AC charger). . Remove the paper discharger unit from the transfer unit. . Clean the area where the paper discharging unit shall be mounted. .

  • Page 123: Replacement Of Drum Cleaner

    5.2.5 Replacement of Drum Cleaner(Fig.5-24 and 5-25) (1). Criterion of Replacement Drum cleaner should be replaced with new drum cleaner according to the periodical READY maintenance cycle set out in the Table 7-1. U: [ L: [ [ OW ] When time is due for replacement of drum cleaner, the warning code "OW"...
  • Page 124 Sequence of Replacement . Remove the cleaner cover. (Fig.5-24) Cleaner Cover . Holding the knob and band located on the top of drum cleaner, remove the drum cleaner. i ). Turning the handle of center part to the arrow direction, dislocate the drum cleaner shaft from the bearing.

  • Page 125: Replacement Of Ozone Filter

    5.2.6 Replacement of Ozone Filter(Fig.5-26) (1). Criterion of Replacement Ozone filter should be replaced with new filter according to the periodical maintenance cycle set out in the Table 7-1. This is to prevent the ozone from being exhausted due to the deterioration of ozone filter. (2).

  • Page 126: Checking Of Paper Feeding Roller And Separator Pad

    5.2.7 Checking of Paper Feeding Roller and Separator Pad (1). Replacement Criteria Since the paper feeding roller and separator pad are defined as periodic replacement parts as per Table 7-1, they should be replaced when the feeding jam (17. MEDIA JAM FEED) occurs. (2).

  • Page 127: Replacement Of Transfer Drum

    5.2.8 Replacement of Transfer Drum (1). Replacement Criteria Since the transfer drum is defined as periodic replacement parts as per Table 7-1, it should be replaced when the print quality failure occurs due to failed transfer drum. (2). Replacement Procedures .

  • Page 128: Operation And Adjustment Of Operator Panel

    6. Operation and Adjustment of Operator Panel 6.1 Panel Layout ......... . .6-1 6.2 Configuration of Operational Mode .
  • Page 129 6. Operation and Adjustment of Operator Panel 6.1 Panel Layout ‘ a b c d e f g h i j k l m n o P Q R S T U V W X O P Q R S T U MESSAGE ONLINE MEDIA...
  • Page 130 6.2 Configuration of Operational Mode This printer has the various functions set out in the table 6-1 for the users to easily understand the operation status of printer engine during the maintenance work. (1). Normal Mode : Provides the function to indicate the operation status and also messages relating with the normal operations which the operators are driving.
  • Page 131 READY Normal Mode "MESSAGE" LED OFF "ONLINE" LED ON WAIT "MESSAGE" LED BLINK PRINT "MESSAGE" LED OFF CHK MEDIA "MESSAGE" LED ON MEDIA TRAY REPLACE * TONER CHECK FUSER OIL CHK CLEANING ROLLER CHECK WASTE TONER PACK MISPRINT ALIGN * TONER CG ALIGN FU.
  • Page 132 Code No. Message in LCD Description of Message • READY LED is lit 00 READY [*1] • Engine has completed the warming-up process and now is ready to print. U F [*2] L F [*3][*4] • Engine is ready to receive "PRREQ", "TPREQ"...
  • Page 133 Code No. Message in LCD Description of Message • Message LED is lit. 02 PRINT [*5][*1] • Engine is ready to print. • For [*1], [*2], [*3] and [*4] appearing in the U F [*2] L F [*3][*4] LCD, see the description of code number 00 above.
  • Page 134 Code No. Message in LCD Description of Message • Engine is idling. REPLACE TONER • Message LED is lit. [*5] : Toner empty condition is indicated by 13 REPLACE [*5] the color code as follows: Y…Yellow TONER [*4] M…Magenta C…Cyan K…Black •...
  • Page 135 Code No. Message in LCD Description of Message 16-1 • Engine is standstill. 16 ALIGN • Message LED is lit. • Fuser unit is not installed. Reconfirm the installation status of the fuser unit. FU.UNIT [*4] • This message will be automatically cleared by open &...
  • Page 136 Code No. Message in LCD Description of Message PAPER JAM • Engine is standstill. • Message LED is lit. 17 PAPER JAM [*7] : Kind of jam (location of jam) is indicated as follows: [ *7 ] [*4] FEED …Paper Feeder INNER …Inside of Printer OUTER…Paper Exit DRUM …Transfer Drum...
  • Page 137 6.4 Service Mode Service mode is a unique mode for the maintenance of printer only. In this mode, you can check the operation status of printer engine as OFFLINE, and also carry out the maintenance work of each printer components. Procedure (1).
  • Page 138 31 GRID PRINT Grid Pattern of single color or two color (R, G, B) and Strip Pattern of full color can be printed for Test Print. Procedure Step Description of Procedures Message in LCD SERVICE MODE Press Select key. (a) ---> (b) TEST PRINT 31 GRID PRINT GRID PRINT/STRIPE...
  • Page 139 32 NEXT CARE INFORMATION Information relating to the replacement timing of periodical replacement parts can be obtained, namely, the number of motion images and printouts. Procedure Step Description of Procedures Message in LCD SERVICE MODE Press Select key after selecting Screen (a) "NEXT NEXT CARE INFO CARE INFO".
  • Page 140 33 CASSETTE TYPE Desired paper feeding cassette can be selected. Procedure Step Description of Procedures Message in LCD Press Select key after selecting Screen (a) "CASSETTE TYPE". (a) ---> (b) SERVICE MODE CASSETTE TYPE 33 CASSETTE TYPE Using Scroll key, select the applicable code of TYPE=<...
  • Page 141 34 TOTAL PAGE Total number of printouts can be confirmed. Procedure Step Description of Procedures Message in LCD Press Select key after selecting TOTAL PAGE SERVICE MODE mode. (a) ---> (b) TOTAL PAGE 34 TOTAL PAGE 0 0 3 6 0 0 P 6 digit number is displayed.
  • Page 142 35 EACH IMAGE Number of created images per each color used in printing can be confirmed. Procedure Step Description of Procedures Message in LCD SERVICE MODE Press Select key after selecting EACH IMAGE mode. (a) ---> (b) EACH IMAGE 35 IMAGE OF Using Scroll key, select the subject color, and then, Y / M / C / K press Select key.
  • Page 143 36 CLEAR CARE Care Code displayed in the LCD can be cleared. Make sure to implement the displayed CLEAR CARE mode whenever replacing the applicable periodical replacement parts with new parts. Procedure Step Description of Procedures Message in LCD SERVICE MODE Press Select key after selecting CLEAR CARE CLEAR CARE mode.
  • Page 144 37 MEDIA MAMAGE Signal from OHP sensor can be ignored at the media select (OHP). However, this mode should not be used under the normal circumstances. Procedure Step Description of Procedures Message in LCD SERVICE MODE Press Select key after selecting MEDIA MANAGE. (a) --->...
  • Page 145 39 FACTORY MODE This mode consists of 9 (nine) subordinate modes for the confirmation of operations and the resetting functions necessary for the maintenance work. Basic Configuration 39 FACTORY MODE 40 DP CHECK 41 BD CHECK 42 FU CHECK 43 MARGIN ADJUST 44 LIFE PRIOD SET 45 NVRAM TUNE UP 46 NVRAM INITIAL...
  • Page 146 40 DP CHECK Toner cartridge of each color can be driven. Procedure Step Description of Procedures Message in LCD Press Select key after selecting DP CHECK. 39 FACTORY MODE (a) ---> (b) DP CHECK 40 DP CHECK Y/M/C/K Using Scroll key, select the desired color, and then, press Select key.
  • Page 147 41 BD CHECK Laser beam position and laser power can be confirmed. Procedure Step Description of Procedures Message in LCD 39 FACTORY MODE Press Select key after selecting BD CHECK. (a) ---> (b) BD CHECK 41 BD CHECK GOOD Scanner motor scans the laser beam as rotating. If the scanning position of laser beam is normal, "GOOD"...
  • Page 148 42 FU CHECK Availability of oil in the fuser unit can be confirmed. Procedure Step Description of Procedures Message in LCD Press Select key after selecting FU CHECK. 39 FACTORY MODE (a) ---> (b) FU CHECK 43 FU CHECK Upon energized, fuser unit starts the heat-up process, and checks the availability of fuser oil.
  • Page 149 43 MARGIN ADJUST The position of top margin and left margin can be confirmed and adjusted within the range between -3.5mm max. and +3.5mm max. Procedure Step Description of Procedures Message in LCD 39 FACTORY MODE Press Select key after selecting MARGIN ADJUST. (a) --->...
  • Page 150 44 LIFE PERIOD SET Replacement life of the periodical replacement parts can be set. Procedure Step Description of Procedures Message in LCD 39 FACTORY MODE Press Select key after selecting LIFE PERIOD mode. (a) ---> (b) LIFE PERIOD SET 44 LIFE PERIOD No.=<...
  • Page 151 45 NVRAM TUNE UP This mode is not used in the normal operation, 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.
  • Page 152 45-1 LP TUNE UP This mode shall be used when optical density, line thickness and/or color reproduction need to be adjusted. The adjustment will be made by changing the laser power against the reference value 0 (zero) in the range between the step -4 and +4. Step Description of Procedures Message in LCD...
  • Page 153 45-2 THV TUNE UP This mode shall be used when transfer voltage needs to be adjusted due to the errors caused such as transfer failure on the media. The adjustment is to change the transfer voltage, subject to the media to be used, against the reference value 0 (zero) in the range between the step -4 and +4.
  • Page 154 45-3 DBV TUNE UP This mode shall be used when image optical density needs to be adjusted. Adjustment is to adjust the developer bias voltage against the reference value 0 (zero) in the range between the step -4 and +4. Step Description of Procedures Message in LCD...
  • Page 155 45-4 CBV TUNE UP This mode shall be used when the image defects attributing to OPC belt need to be improved. Adjustment is to adjust the OPC belt bias voltage against the reference value 0 (zero) in the range between the step -4 and +4. Step Description of Procedures Message in LCD...
  • Page 156 45-5 FBV TUNE UP This mode shall be used when the image defects attributing to 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. Step Description of Procedures Message in LCD...
  • Page 157 46 NVRAM INITIAL This mode can initialize (data clear) all the data of NVRAM on MCTL PWB, 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 158 47 TOTAL PAGE SET This mode can reset the number of total pages on NVRAM whenever executing NVRAM INITIAL or replacing the MCTL PWB. Step Description of Procedures Message in LCD 39 FACTORY MODE Press Select key after selecting TOTAL PAGE SET. (a) --->...
  • Page 159 48 EACH IMAGE SET This mode can reset the number of total pages of each color on NVRAM whenever executing NVRAM INITIAL or replacing the MCTL PWB. Step Description of Procedures Message in LCD 39 FACTORY MODE Press Select key after selecting EACH IMAGE SET. (a) --->...
  • Page 160 6.5 Procedures of Adjustment Work 6.5.1 Adjustment of Top and Left Margin Top and left margin can be adjusted by the key operation on the operator panel. (1). Purpose : If there is no top margin or left margin for the print guarantee area or when MCTL PWB is replaced, the adjustment of top and left margin will be required.
  • Page 161 6.5.2 Setting of RAM Data As Data in the RAM has been preset to the optimum value at the ex-work, it is not necessary to change the preset value under the normal condition. However, fine adjustment may be required subject to the media or operational conditions. (1).
  • Page 162 6.5.3 Confirmation and Setting of Total Number of Printouts Total number of printouts is stored in the RAM. Confirmation and setting of total number of printouts can be confirmed and reset by manipulating the key on the operator panel. (1). Purpose : Total number of printouts shall be reset when changing the MCTL PWB or executing the NVRAM INITIAL.
  • Page 163 6.5.5 Initial Setting of RAM Implement the initial setting at the replacement of MCTL P.W.B. after clearing the contents of RAM. (1). Purpose : Number of images per each color shall be reset when changing the MCTL P.W.B. or executing the NVRAM INITIAL. (2).
  • Page 164 7. Replacement Procedure of Maintenance Parts 7.1 Replacement of Cover ........7-2 7.1.1 Upper Side Cover (LU) .
  • Page 165 7.5 Replacement of Sensor ........7-45 7.5.1 Interlock Switch (Front) / (Top) / (Rear) .

  • Page 166: Replacement Procedure Of Maintenance Parts

    7. Replacement Procedure of Maintenance Parts Respect the procedures and precautions described below for the maintenance work. (1). Do not implement any operation, disassembly, and modification etc., which are not set out in this Manual. (2). Turn the power supply OFF and unplug the power supply cable from the outlet prior to starting the disassembly or check.
  • Page 167 Table 7-1: Table of Applicable Screws Size and Shape of Screw Class Code Name of Screw Remarks M-Threed Length Sharp BT3 8 10mm BT3 12 To be used Cross recessed head for installation tapping screw. of plastic parts. 10mm BT4 10 To be used for installation of S tight screw...

  • Page 168: Replacement Of Cover

    7.1 Replacement of Cover [ Name of Each Covers ] Top Cover Operator Panel 7.1.4 Paper Exit Cover (Paper Exit Unit) 7.1.5 Main Switch Side Cover (R) @ Front Cover 7.1.2 i Front Cover Unit j Base Cover (R) Paper Cassette 7.1.9 [Front Face] Side Cover (LU)

  • Page 169: Upper Side Cover (Lu)

    7.1.1 Upper Side Cover (LU) Tools . Phillips Screwdriver #2 Disassembly Procedures . Open the paper exit unit. . Remove the set screw BT4 8 of side cover (LU). Side Cover(LU) . Pressing the exterior of the side cover (L), unlock the Paper Exit Cover interlock (three locations) with the side cover (LU).

  • Page 170: Side Cover (R)

    7.1.2 Side Cover (R) Tools . Phillips Screwdriver #2 Disassembly Procedures . Open the front cover unit. . Remove the set screw BT4 8 (1 pc.) of side cover (R) at the rear side. (Fig.7-3) . Slide the side cover (R) to the arrow direction.

  • Page 171: Side Cover (L)

    7.1.3 Side Cover (L) Tools . Phillips Screwdriver #2 Disassembly Procedures . Open the paper exit unit. . Remove the side cover (LU). (See the item 7.1.1.) . Remove the set screw BT4 8 (2 pcs.) of side cover (L). .

  • Page 172: Top Cover

    7.1.4 Top Cover Tools . Phillips Screwdriver #2 Disassembly Procedures . Open the paper exit unit and the front cover Unit. . Remove the side cover (LU). (See the item 7.1.1) . Remove the side cover (L) and side cover (R). (See the item 7.1.2 and 7.1.3.) .

  • Page 173: Paper Exit Cover

    7.1.5 Paper Exit Cover Tools . Phillips Screwdriver #1, #2 Release arm Fan Case Ass'y Harness Cover Disassembly Procedures Paper Exit Cover Hook (L) . Remove the side cover (LU). (See the item 7.1.1) . Remove the side cover (L). (See the item 7.1.2) .

  • Page 174: Rear Cover (L)

    7.1.6 Rear Cover (L) (Transfer Unit Cover) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Open the transfer unit. . Remove the set screw ST3 6 (1 pc.) of transfer unit and fixing Metal. . Remove the transfer unit. .

  • Page 175: Rear Cover (U)

    7.1.7 Rear Cover (U) Tools . Phillips Screwdriver #2 Disassembly Procedures . Open the transfer unit. . Unplug the power supply cable from the inlet. . Remove the rear cover. (See the item 7.1.8.) . Remove the side cover (R). (See the item 7.1.2.) .

  • Page 176: Rear Cover

    7.1.8 Rear Cover Tools . Phillips Screwdriver #2 Disassembly Procedures . Unplug the power cable from the inlet. . Remove the set screw BT4 8 (1 pc.) of rear cover. . Remove the rear cover. Assembly Procedures . Install a new rear cover. .

  • Page 177: Base Cover (R)

    7.1.9 Base Cover (R) Tools . Phillips Screwdriver #2 Disassembly Procedures . Remove the side cover (R). (See the item 7.1.3.) . Remove the set screw [BT4 8 (2 pcs.)] of base cover (R). . Remove the base cover (R) from the base. i ).

  • Page 178: Base Cover (L)

    7.1.10 Base Cover (L) Tools . Phillips Screwdriver #2 Disassembly Procedures . Remove the side cover (L). (See the item 7.1.3.) . Remove the set screw [BT4 8 (2 pcs.)] of base cover (L). . Remove the base cover (L) from the base. i ).

  • Page 179: Cleaner Cover

    7.1.11 Cleaner Cover Tools No tool is required. Disassembly Procedures Cleaner Cover . Open the paper exit cover. Knob . Holding the ears, remove the cleaner cover. Paper Exit Cover Assembly Procedures . Install a new cleaner cover. . Close the paper exit cover. Precautions Fig.7-11 7-14...

  • Page 180: Replacement Of Printed Wire Board (P.w.b)

    7.2 Replacement of Printed Wire Board (P.W.B) [ Layout of Printed wire Board ] 7 . 2 . 7 7 . 2 . 4 Erase Lamp P a n e l P . W . B 7 . 2 . 3 I O D 2 P .

  • Page 181: Mctl P.w.b

    7.2.1 MCTL P.W.B. Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the side cover (L). (See the item 7.1.2) . Remove the top cover. (See the item 7.1.4) . Remove the set screw ST3 6 (3 pcs.) of shield cover 'A'. .
  • Page 182 Shield Cover (Upper) Side Cover (LU) Shield Cover A MCTL P.W.B Side Cover (L) Shield Cover B Shield Case A Ass'y Fig.7-13 7-17...

  • Page 183: Iod1 P.w.b

    7.2.2 IOD1 P.W.B. Tools Side Cover(LU) . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the side cover (LU). (See the item 7.1.1.) . Remove the top cover. Side Cover(L) (See the item 7.1.4.) Top Cover . Remove the set screw ST3 6 (3 pcs.) of shield (upper).

  • Page 184: Iod2 P.w.b

    7.2.3 IOD2 P.W.B. (with the base) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the side cover (R). (See the item 7.1.3.) . Disconnect all the harness connectors (15 pcs.) connected with the IOD2 P.W.B. . Remove the C ring of registration clutch. .
  • Page 185 Side Cover (R) Fuser Clutch Cleaner Clutch Registration Clutch IOD2 P.W.B C ring Fig.7-15 Stopper Paper Feeder Clutch Recessed Part IOD Base (Rear Side) Fig.7-16 7-20...

  • Page 186: Panel P.w.b

    7.2.4 Panel P.W.B. (LCD inclusive) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures Side Cover(LU) . Remove the side cover (LU). (See the item 7.1.1.) . Remove the set screw [BT4 10 (1 pc.)] of the panel case assembly. . Disconnect the connector. .

  • Page 187: Power Supply Unit

    7.2.5 Power Supply Unit Tools . Phillips Screwdriver . Slotted Screwdriver Disassembly Procedures . Remove the side cover (LU). (See the item 7.1.1.) . Remove the side cover (L). (See the item 7.1.2.) . Remove the shield cover (upper). (See the item 7.2.1.) .
  • Page 188 Precautions WARNING Earthing wire is very important to secure the safety of users. Upon removal of the power supply unit, confirm that the earthing wires (green and yellow color) is securely connected to the part. Shield Cover A Controll Fan Ass’y Side Cover(LU) Shield Cover(L) Shield Cover B...

  • Page 189: High Voltage Unit

    7.2.6 High Voltage Unit Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the side cover (LU). (See the item 7.1.1.) . Remove the side cover (L). (See the item 7.1.2.) . Remove the shield cover (upper). (See the item 7.2.1.) .
  • Page 190 Precautions WARNING High Voltage Unit generates high voltage (5KV). You may get electric shock if you touch the unit while it is powered on. Therefore, turn on the unit only after having installed the side cover (L). Shield Cover A Side Cover(LU) Controll Fan Ass’y Side Cover(L)

  • Page 191: Erase Lamp

    7.2.7 Erase Lamp Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the drum cleaner assembly. Holder (See the item 7.6.3.) . Disconnect the harness connectors connected to the erase lamp. . Remove the erase lamp from the holder. Front Side Connector iBack Side j...

  • Page 192: Replacement Of Motor Unit

    7.3 Replacement of Motor Unit [ Layout of Motors ] 7.3.6 Ozon Fan 7.3.5 Heater Fan 7.3.1 Main Motor 7.3.2 7.3.4 Developer Drive Motor Controller Fan 7.3.3 Scanner Motor Fig.7-21 7-27...
  • Page 193 7.3.1 Main Motor (MM) / Main Gear Unit Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the belt cartridge. . Remove the side cover (R). (See the item 7.1.3.) . Remove the base cover (R). (See the item 7.1.9.) .

  • Page 194: Main Motor / Main Gear Unit

    TR Side Cover (R) Top Cover Stay(R) OZone Fan Duct Side Cover(L) Drum Cleaner Solenoid Main Motor Fuser Clutch Main Gear Unit Cleaner Clutch ID2 P.W.B Registration Clutch Base Cover(R) Fig.7-22 7-29...
  • Page 195 7.3.2 Developer Drive Motor (DM) / Developer Drive Unit Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the toner cartridge. Waste Toner Feeder Pipe . Remove the side cover (R). (See the item 7.1.3.) . Remove the top cover. (See the item 7.1.4.) .

  • Page 196: Developer Drive Motor / Developer Drive Unit

    Developer Drive Unit Developer Clutch Harness Guide Developer Drive Motor Fig.7-23-a 7-31...

  • Page 197: Optical Unit

    7.3.3 Optical Unit (Scanner Motor inclusive) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the toner cartridge. . Remove the belt cartridge. . Remove the cover 'C'. Laser WARNING Label Cover 'C' is fixed by the plastic projection and hole at three locations each in the front side and rear side.

  • Page 198: Control Fan

    7.3.4 Control Fan (CTFAN) Tools . Phillips Screwdriver #1, #2 Controller Fan Disassembly Procedures . Remove the side cover (LU). (See the item 7.1.1.) . Remove the side cover (L). (See the item 7.1.2.) . Remove the top cover. (See the item 7.1.4.) .

  • Page 199: Fuser Fan

    7.3.5 Fuser Fan (FUFAN) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures Paper Exit Unit . Remove the side cover (LU). Paper Exit Harness Cover (See the item 7.1.1.) . Remove the side cover (L). (See the item 7.1.2.) . Remove the shield case A assembly. (See the item 7.2.5.) .

  • Page 200: Ozone Fan

    7.3.6 Ozone Fan (OZFAN) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures Waster Toner Feeder Pipe . Remove the toner cartridge. . Remove the side cover (R). (See the item 7.1.3.) . Remove the IOD2 P.W.B. (See the item 7.2.3.) .

  • Page 201: Replacement Of Clutch And Solenoid

    7.4 Replacement of Clutch and Solenoid [ Layout of Clutch and Solenoid ] Drum Cleaner Solenoid Fuser Clutch Cleaner Clutch Transfer Solenoid Registration Clutch Paper Feed Clutch Developer Clutch(K) Developer Clutch(Y) Developer Clutch(M) Developer Clutch(C) (Developer Solenoids) Fig.7-28 7-36...

  • Page 202: Paper Feeding Clutch

    7.4.1 Paper Feeding Clutch (PCLU) Tools . Phillips Screwdriver #1, #2 . Slotted Screwdriver #1 Disassembly Procedures . Remove the side cover (R). (See the item 7.1.3) . Remove the IOD2 P.W.B base. (See the item 7.2.3) . Remove the C ring fixing the paper feeding clutch. .

  • Page 203: Registration Clutch

    7.4.2 Registration Clutch (RECL) Tools . Phillips Screwdriver #1, #2 . Slotted Screwdriver #1 Disassembly Procedures . Remove the side cover (R). (See the item 7.1.3.) . Remove all the connector of registration clutch connected with IOD2 P.W.B. . Remove the C ring from the Registration shaft.

  • Page 204: Fuser Clutch

    7.4.3 Fuser Clutch (FUCL) Tools . Phillips Screwdriver #1, #2 . Slotted Screwdriver #1 Disassembly Procedures . Remove the side cover (R). Fuser Clutch (See the item 7.1.3.) C ring . Remove the connector connected with IOD2 P.W.B. . Remove the C ring from the shaft.
  • Page 205 7.4.4 Cleaner Clutch (FBCL) Tools . Phillips Screwdriver #1, #2 . Slotted Screwdriver #1 Disassembly Procedures . Remove the side cover (R). (See the item 7.1.3 .) Cleaner Clutch . Remove the connector of cleaner clutch from IOD2 P.W.B. . Remove the C ring from the shaft.

  • Page 206: Cleaner Clutch

    7.4.5 Developer Clutch (K, Y, M, C) Tools . Phillips Screwdriver #1, #2 . Slotted Screwdriver #1 Disassembly Procedures . Remove the side cover (R). (See the item 7.1.3.) . Remove IOD2 P.W.B. base. (See the item 7.2.3.) . Remove the C ring of subject developer clutch from the shaft. .
  • Page 207 7.4.6 Transfer Solenoid (TRSOL) Tools . Phillips Screwdriver #1, #2 . Slotted Screwdriver #1 Disassembly Procedures . Remove the side cover (R). (See the item 7.1.3.) . Remove the IOD2 P.W.B. (See the item 7.2.3.) . Remove the main gear unit. (See the item 7.3.1.) .

  • Page 208: Transfer Solenoid

    Top Cover Stay(R) Ozone Fan Duct Side Cover(L) Main Motor Transfer Solenoid Fuser Clutch Main Gear Unit Cleaner Clutch IOD2 P.W.B Registration Clutch Paper Feeder Clutch Base Cover(R) Fig.7-34 7-43...

  • Page 209: Drum Cleaner Solenoid

    7.4.7 Drum Cleaner Solenoid (FBSOL) Tools . Phillips Screwdriver #1, #2 . Slotted Screwdriver #1 Disassembly Procedures . Remove the side cover (R). (See the item 7.1.3.) . Remove IOD2 P.W.B base. (See the item 7.2.3.) . Remove the main motor / gear unit. (See the item 7.3.1.) .

  • Page 210: Replacement Of Sensor

    7.5 Replacement of Sensor [ Layout of Sensors ] Temperature Sensor 7.5.3 E Thermistor to detect 7.5.12 Paper Exit Sensor 7.5.6 Cleaning Roller Sensor Drum Jam Sensor 7.5.7 Oil Sensor 7.5.1-2 Interlock Switch(Top) 7.5.11 Toner Detecting 7.5.9 Sensor Belt Sensor 7.5.1-1 Interlock Switch 7.5.1-3...
  • Page 211 (for Front Cover) 7.5.1-1 Interlock Switch (DSW1) Tools . Phillips Screwdriver #1 Disassembly Procedures . Remove the top cover. (See the item 7.1.4.) . Remove the shield cover (upper). . Remove the switch from the stay U. . Remove the connector. .
  • Page 212 7.5.1-2 Interlock Switch (DSW2) (for Paper Exit Unit) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the side cover (LU). (See the item 7.1.1.) . Remove the top cover. (See the item 7.1.4.) . Remove the control fan assembly. (See the item 7.3.4.) .
  • Page 213 7.5.1-3 Interlock Switch (DSW3) Tools . Phillips Screwdriver #1 Disassembly Procedures Interlock Switch . Remove the side cover (L). Transfer electrode Base (See the item 7.1.2.) . Remove the transfer drum. (See the item 7.6.3.) . Remove the set screw ST3 6 (2 pcs.) of transfer electrode base.

  • Page 214: Paper Sensor (Paper Feeding Sensor Pt1)

    7.5.2 Paper Sensor (Paper Feeding Sensor PT1) Tools . Phillips Screwdriver #1 Disassembly Procedures . Remove the transfer drum. (See the item 7.6.1.) . Remove the set screw ST3 6 (2 pcs.), and the paper guide (UR) assembly. . Unlock the paper feeding sensor from the rear side of the hole where the paper guide (UR) has been removed.
  • Page 215 Fixing Metal Paper Guide(UR) Transfer Unit Paper Sensor(PT1) Paper Guide Paper Guide(UL) Fig.7-40 7-50...

  • Page 216: Paper Sensor (Paper Exit Sensor Pt2)

    7.5.3 Paper Sensor (Paper Exit Sensor PT2) Tools . Phillips Screwdriver #2 Disassembly Procedures . Remove the paper exit cover. (See the item 7.1.5.) . Disconnect the harness connector connected to the the paper exit sensor (PT2). . Remove the paper exit sensor from the paper exit guide (paper exit stay). Assembly Procedures .

  • Page 217: Paper Empty Sensor (Pe) / Ohp Sensor (Ohp)

    7.5.4 Paper Empty Sensor (PE) / OHP Sensor (OHP) Tools . Phillips Screwdriver #1 Disassembly Procedures . Remove the transfer unit. (See the item 7.6.1.) . Remove the set screw ST3 6 (2 pcs.) of paper guide (L). . Remove the paper guide (L). .
  • Page 218 Transfer Unit Paper Guide Paper Guide(UL)Ass'y OHP Sensor Paper Sensor(PE) Paper Guide(UL)Ass'y (Side View from Rear Side) Fig.7-42 7-53...

  • Page 219: Paper Size Sensor (Psu)

    7.5.5 Paper Size Sensor (PSU) Tools . Phillips Screwdriver Disassembly Procedures . Remove the side cover (L). (See the item 7.1.2. ) . Remove the power supply unit. (See the item 7.2.5.) . Remove the set screw BT3 8 (2 pcs.) of the paper cassette guide (L) assembly. .

  • Page 220: Drum Jam Sensor (Dpj)

    7.5.6 Drum Jam Sensor (DPJ) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the fuser unit. . Remove the belt cartridge. . Remove the drum cleaner. . Remove the transfer drum. (See the item 7.6.3.) . Remove the cover F. .

  • Page 221: Oil Sensor (Oil)

    7.5.7 Oil Sensor (OIL) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the fuser unit. . Remove the side cover (LU). (See the item 7.1.1.) . Remove the side cover (L). (See the item 7.1.2.) . Remove the top cover. (See the item 7.1.4.) .

  • Page 222: Drum Encoder Sensor (En)

    7.5.8 Drum Encoder Sensor (EN) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the toner cartridge. . Remove the belt cartridge. . Remove the drum cleaner. Sensor Holder Ass'y . Remove the fuser unit. Transfer Drum . Remove the side cover (L). (See the item 7.1.2.) Drum Encoder Sensor (EN)

  • Page 223: Belt Sensor (Pbs)

    7.5.9 Belt Sensor (PBS) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the toner cartridge. . Remove the belt cartridge. . Remove the drum cleaner. . Remove the top cover. (See the item 7.1.4.) . Remove the control fan assembly. (See the item 7.3.4.) .

  • Page 224: Waste Toner Sensor (Wst)

    7.5.10 Waste Toner Sensor (WTS) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the side cover (R). (See the item 7.1.3.) . Lift up the bottle holder. (Remove the waste toner sensor by removing the hooked pawl.) . Disconnect all the connectors connected with the waste toner sensor.

  • Page 225: Toner Sensor Assembly (Tpd / Ttr)

    7.5.11 Toner Sensor Assembly (TPD) / (TTR) Tools . Phillips Screwdriver #1, #2 Disassembly Procedures (TPD): . Remove the side cover (R). (See the item 7.1.3.) . Remove the developer drive unit. (See the item 7.3.2.) . Remove the set screw ST3 6 (3 pcs.) of toner sensor P.W.B. .
  • Page 226 Assembly Procedures (TPD): . Connect the connectors with a new toner sensor P.W.B. . Install the toner sensor P.W.B. to the engine frame (R). (TTR): . Connect the connectors with a new toner sensor P.W.B. . Install the toner sensor P.W.B. to the engine frame (L). .
  • Page 227 7.5.12 Cleaning Roller Sensor (CRS) Tools . Phillips Screwdriver #1 Disassembly Procedures . Open the paper exit cover. . Remove the paper exit harness cover by removing set screw [ST3 6 (1 pc.)]. . Remove the connector connected with the cleaning roller sensor. .

  • Page 228: Replacement Of Roller And Drum

    7.6 Replacement of Roller and Drum 7.6.1 Transfer Unit Necessary Tools . Phillips Screwdriver #1 Disassembly Procedures . Remove the set screw [ST3 6 (1 pc.)] of metal fixture for transfer unit. . Open the transfer unit, and remove the shaft from the frame installation hole. i ).

  • Page 229: Register Roller

    7.6.2 Register Roller Tools . Phillips Screwdriver #1 . Slotted Screwdriver #1 Disassembly Procedures . Open the transfer unit. . Remove the roller fixing C ring at both sides. . Remove the gear from the shaft. . Remove the shaft support at the both sides. .

  • Page 230: Transfer Drum

    7.6.3 Transfer Drum Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the toner cartridge. . Remove the belt cartridge. . Remove the fuser unit. . Remove the cleaner cover. . Remove the drum cleaner. . Open the transfer unit. .
  • Page 231 Wrap transfer drum surface with paper Transfer Drum Stay A Ass'y Fig.7-52 7-66...
  • Page 232 7.6.4 Paper Feed Roller / Separator Pad Tools . Phillips Screwdriver #1 Disassembly Procedures . Remove the paper feeding cassette. . Remove the transfer unit. (See the item 7.6.1.) . Remove the set screw ST3 6 (2 pcs.) of paper guide (L). .

  • Page 233: Paper Feed Roller / Separator Pad

    Fixing Metal Paper Feed Roller Separator Pad Paper Guide(UR) Paper Guide Paper Guide(UL) Transfer Unit Fig.7-53 7-68...

  • Page 234: Front Cover Unit

    7.6.5 Front Cover Unit Necessary Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the side cover (L). (See the item 7.1.2.) . Remove the base cover (L). (See the item 7.1.10.) . Open the front cover unit. . Remove the set screws [BT4 8 (2 pcs.)] of front cover (inner).
  • Page 235 Hinge arm Front hinge(L) Hinge holder Front Inner Cover Front Cover Unit Fig.7-54 7-70...

  • Page 236: Paper Exit Roller

    7.6.6 Paper Exit Roller Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the paper exit unit. (See the item 7.1.5.) . Remove the paper exit cover. (See the item 7.1.5.) . Remove the C ring of both sides (left and right). .
  • Page 237 Heater Fan H.Harness Cover Release arm Paper Exit Cover Hook (L) Hook (R) Spring Discharge brush Metal Cring Paper Exit Roller Paper Exit Roller Metal Cring Cring Fig.7-55 7-72...

  • Page 238: Discharger Brush

    7.6.7 Discharger Brush Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the paper exit unit. (See the item 7.1.5.) . Remove the paper exit cover. (See the item 7.1.5.) . Remove the paper exit front cover. . Remove the set screw BT4 6 (2 pcs.) of discharger brush. .
  • Page 239 Heater Fan Release arm H.Harness Cover Paper Exit Cover Hook (L) Hook (R) Spring Discharge brush Cring Fig.7-56 7-74...

  • Page 240: Waste Toner Feeder (D)

    7.6.8 Waste Toner Feeder D (Stay 'A' Assembly) Tools . Phillips Screwdriver #2 Disassembly Procedures . Remove the belt cartridge. . Remove the toner cartridge. . Remove the drum cleaner. . Remove the side cover (LU). (See the item 7.1.1.) .
  • Page 241 Stay A Ass'y Fig.7-57 7-76...

  • Page 242: Fuser Connector

    7.6.9 Fuser Connector Tools . Phillips Screwdriver #1, #2 Disassembly Procedures . Remove the fuser unit. . Remove the side cover (L). Fuser Connector (See the item 7.1.2.) . Remove the shield case A assembly. (See the item 7.2.5.) Fram Ass'y .
  • Page 243 7.7 Replacement of Fuser Unit [Layout of Fuser Unit Parts] F.Cover (L) Cleaning Roller Back-up Roller Low Guide Fram F.Terminal (L) Thermister Cover Thermistor Ass'y Fusing Heater Fusing Roller F.Terminal (R) Oil Pan F.Cover B F Cover (R) Fig.7-59 DANGER [Note in Parts Replacement] 1.
  • Page 244 Thermal Cut Off Thermal Cut Off D115 D125 Tube Tube Fuser Connector P Back-up Roller Fuser Heater (300W) Fuser Roller Fuser Heater (400W) T.Adjyustment P.W.B Thermister Tube Wiring of Fuser Unit...

  • Page 245: Fusing Heater Lamp

    7.7.1 Fusing Heater Lamp Tools . Phillips Screwdriver #1, #2 Disassembly Procedures : See the layout of fuser unit parts. . Remove the set screw ST3 6 (1 pc.) of F. cover (L), and F. cover (L). . Remove the set screw ST3 6 (1 pc.) of F. cover (R), and F. cover (R). .
  • Page 246 Back-up Roller Fuser Roller Terminal (L) Fuser Lamp (300W) Fuser Lamp (400W) Terminal (L) Fig.7-60 7-81...

  • Page 247: Fuser Roller

    7.7.2 Fuser Roller Tools . Phillips Screwdriver #1, #2 Disassembly Procedures : See the layout of fuser unit parts. . Remove the fusing heater lamp (400W). (See the item 7.7.1.) . Remove the set screw FST3 10 (1 pcs.) of F. terminal (R), and remove F.

  • Page 248: Back-Up Roller

    7.7.3 Back-Up Roller Tools . Phillips Screwdriver #1, #2 Disassembly Procedures : See the layout of fuser unit parts. . Remove the fusing heater lamp (300W). (See the item 7.7.1.) . Remove the set screw ST3 6 (2 pcs.) of oil pan. .
  • Page 249 8. Troubleshooting 8.1 Outline of Troubleshooting ......8-1 8.1.1 Operator Call ........8-1 8.1.2 Paper Transport Error .

  • Page 250: Troubleshooting

    8. Troubleshooting 8.1 Outline of Troubleshooting Printer in trouble Reset the power after once turning off the main switch [Trouble Repeat] Is power supply operating normally ? Check power cord and cable [Normally Operating] Operator Call Paper Transport Error Printer Error Imaging Failure [Section 8.1.1] [Section 8.1.2]...

  • Page 251: Operator Call

    1. Operator Call Table 8-1 Subject of Operator Call Countermeasure Code Message of Display NO MEDIA UPP/LOW [No paper in the upper cassette.] • Replenish papers. [No paper in the lower cassette.] CHK MEDIA UPP/LOW • Change media. [Inconsistency of media.] NO TRAY UPP/LOW [No upper paper cassette.] •...
  • Page 252 Subject of Operator Call Countermeasure Code Message of Display MEDIA JAM INNER • Open transfer unit, and remove paper [Paper jamming inside printer] jammed inside. MEDIA JAM OUTER • Open transfer unit / paper exit unit, [Paper jamming at paper exit area] and remove paper jammed inside.
  • Page 253 (6). In case that the operator call is not cleared: Normally, the operator call can be cleared by the implementation of applicable countermeasures listed in Table 8-1. If not cleared, the printer engine may be in trouble. Check and implement appropriate countermeasures in accordance with the following procedures.
  • Page 254 11 Message "NO MEDIA UPP/LOW" is indicated again. Confirm the action of Paper Sensor (PE). Install the Sensor properly. Is Sensor Lever damaged or Sensor undone? Check the Paper Guide (UR). Is Connector of Paper Sensor is disconnected? Connect the connector. Is the connection between Paper Sensor and IOD1 is disconnected? Replace Paper Sensor (PE).
  • Page 255 Message "NO TRAY UPP/LOW" is indicated again. Check Paper Cassette. Is Paper Size Sensor Lever damaged ? Replace the Paper Cassette. Check Paper Size Sensor (PSU). Is PSU properly installed damaged ? Replace the PSU. Is connector of Paper Size Sensor disconnected? Connect the connector.
  • Page 256 Message "REPLACE TONER" is indicated again. Confirm Toner Cartridge. Is the Toner Cartridge replaced Replace the identified as identified on the panel ? Toner Cartridge. Confirm Toner Sensor. When the identified Toner Cartridge is not mounted, is the message "16" ALIGN TONER CG indicated on the panel? Check the connection of Harness Connector, and replace Toner Sensor.
  • Page 257 Message "CHECK WASTE TONER" is indicated again. Confirm the installation of Waste Toner Pack. Install the pack properly. Is Waste Toner Pack installed properly ? Confirm Waste Toner Pack Sensor Switch. Is the Sensor Switch damaged ? Replace the Sensor Switch. Harness Connector of Sensor Switch is disconnected.
  • Page 258 Message "CHECK FUSER OIL" is indicated again. Implement printing more than 30 pages to confirm clearance of "CHECK FUSER OIL". Confirm the installation of Oil Bottle. Is Oil Bottle fixed by the lever ? Fix Oil Bottle by the lever. Is Oil supplied from Oil Bottle ? Replace the Oil Bottle.
  • Page 259 Message "CHK CLEANING ROLLER" is indicated again. Check the installation of Cleaning Roller. Install the Cleaning Roller properly. Is Cleaning Roller is installed? Confirm Cleaning Roller Sensor. Is the Cleaning Roller Sensor damaged? Replace the Cleaning Roller Sensor. Is Error Code 14 cleared ? Check the Harness (shonted?) &...
  • Page 260 Message "MEDIA JAM FEED" is indicated again. Confirm the installation of Paper Cassette. Is paper in use a recommended paper ? Use a recommended paper. Is the paper cassette properly installed ? Reset the cassette properly. Is the cassette base damaged or deformed ? Replace the cassette.
  • Page 261 Message "MEDIA JAM INNER" remains. Confirm if there is any paper debris found at paper feeding and transfer area or not. Is there paper debris within transfer unit. Remove the paper debris. Confirm the installation of transfer unit. Open and close the transfer unit. Is the transfer unit properly closed ? Is PT1 Sensor Lever undone? Reset the PT1 Sensor Lever.
  • Page 262 Message "MEDIA JAM OUTER" is indicated again. Confirm if there is any paper debris found in transfer unit / paper exit unit or not. Is the paper debris is found in above units. Remove the paper debris. Confirm the installation of Paper Exit Unit. Check and Reset the PT2 Does PT2 Sensor Lever operate smoothly? Sensor Lever.
  • Page 263 Message "MEDIA JAM DRUM" is indicated again. Confirm if there is any paper debris found at transfer drum area or not. Is there paper debris on the transfer drum. Remove the paper debris. Check the Harness of Drum Jam Sensor (DPJ) and Replace the Drum Jam Sensor. Is Error Code 17 cleared ? Replace IOD1 P.W.B.
  • Page 264 Message "CLOSE PANEL FRONT/TOP" is indicated again. Confirm if Front/Top Cover is closed or not. Is Front/Top Cover locked firmly ? Open and close the Cover. Is Front Cover Lock Lever deformed ? Restore the deformed Lever. Is the Top Cover or Switch Actuator Replace the Paper Exit Unit.
  • Page 265 Message "CLOSE TR UNIT" is indicated again. Confirm if Transfer Unit is closed or not. Is Transfer Unit locked firmly ? Open and close the Transfer Unit. Is Transfer Unit Lock deformed ? Replace the Transfer Unit. Is Error Code 18 cleared ? Confirm the Interlock "DSW3".

  • Page 266: Paper Transport Error

    8.1.2 Paper Transport Error Paper is transported through the path shown in Fig.8-1. Paper jam at the following locations is the user-friendly for clearance. • Paper Feeding Part / • Transfer Part / • Fuser Part / • Paper Exiting Part. Paper Exit Roller Oil Bottle Fusing Unit...
  • Page 267 (2). Inner Jam Table 8-2-2 Problem Item Check Item Result Corrective Action Open the transfer unit for check. Remove the paper Is there any paper inside the unit ? inside. Transfer Is the transfer roller firmly locked Fix the transfer roller by Unit by the lock lever ? the lock lever.
  • Page 268 (3). Outer Jam Table 8-2-3 Problem Item Check Item Result Corrective Action Is the print paper a Use a recommended Print Paper recommended paper ? paper. Paper Exit Open and close the Is the paper exit unit firmly locked by the lock lever ? Unit paper exit unit again.

  • Page 269: Printer Error

    8.2 Printer Error If errors or failures occurred inside the printer, the applicable error message will be displayed on the operator panel, and the printer stops. If errors or failures would repeat even after pressing the clear switch, confirm the error code, and then call for the service of maintenance company nearby.
  • Page 270 Table 8-1 : Error Code [1/2] No. Code Description NVRAM Error (MCTL P.W.B.) Engine Controller MCTL P.W.B. Hardware Error Process Timing Clock Error (Main Motor Clock Error) Clutch Error of Yellow Developing Unit Clutch Error of Magenta Developing Unit Clutch Error of Cyan Developing Unit Clutch Error of Black Developing Unit HPSI Signal Error (Retract Error of Black and Yellow Toner Cartridge) HPSI Signal Error (Retract Error of Cyan and Magenta Toner Cartridge)
  • Page 271 Table 8-1 : Error Code [2/2] No. Code Description Charging HV (DC High Voltage) Error Fuser Thermistor Error Fusing Temperature Error (Warming-Up Time Error) Fusing Temperature (3) Error (Heater Continuous ON Time Error) Fusing Temperature (4) Error (Heater Continuous OFF Time Error) Beam Sensor Error Scanner Motor Error Laser Power Error...
  • Page 272 8.2 Troubleshoot Code Description of Error Cause of Error Clearance Method 1. Failure of MCTL P.W.B. 1. Turn on and off the power switch. NVRAM Error ECPU 2. Above method 1 does not work, implement "C3 Error Clearance Procedure". EEEPROM 3.
  • Page 273 Description of Error Cause of Error Code 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 274 Error Code Name of Part Developer Clutch (DCLY) Confirm the connection of Connector. Is the connection proper between ECN17 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 275 Error Code Name of Part Developer Clutch (DCLM) Confirm the connection of Connector. Is the connection proper between ECN16 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 276 Error Code Developer Clutch (DCLC) Name of Part Confirm the connection of Connector. Connect the harness. Is the connection proper between ECN14 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 277 Error Code Developer Clutch (DCLK) Name of Part Confirm the connection of Connector. Connect the harness. Is the connection proper between ECN13 of IOD2 and Clutch (DCLK) ? Is the harness of Clutch (DCLK) broken ? Connect the connector properly. Complete Is D4 Error cleared ? Check the voltage at DCLK ON-N.
  • Page 278 Error Code Name of Part Developer Solenoid (PSL YM) Confirm the connection of Connector. Is the connection proper between ECN3 of IOD2 and Solenoid (PSL YM) ? Connect the harness. Is the harness of Solenoid (PSL YM) broken ? Connect the connector properly Complete Is D5 Error cleared ? Check the voltage at (PSL YM) ON-N.
  • Page 279 Error Code Name of Part Developer Solenoid (PSL KC) Confirm the connection of Connector. Connect the harness. Is the connection proper between ECN3 of IOD2 and Solenoid (PSL KC) ? Is the harness of Solenoid (PSL KC) broken ? Connect the connector properly. Complete Is D6 Error cleared ? Check the voltage at (PSL KC) ON-N.
  • Page 280 Error Code Concerned Part Developer Motor(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 ECN15 of IOD2 properly connected with connector of DM1? Replace developer gear unit and motor.
  • Page 281 Error Code Concerned Part Main Motor(MM) Replace the belt cartridge. Does a belt cartridge rotate lightly ? Does a fuser unit rotate lightly ? Replace the fuser unit. Is E2 error cleared ? Confirm the connection of connector. Job is complete. Replace developer gear unit and motor.
  • Page 282 Error Code Concerned Part Drum HP Sensor 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 283 Error Code Concerned Part Toner Sensor P.W.B.(LED side) Confirm the connection of a toner sensor P.W.B.(LED side) connector. Connect them properly. Is DCN7 of IOD1 properly connected with a connector of the toner sensor ? Check the voltage(LEDON-N/P) Is E4 error cleared ? Job is complete.
  • Page 284 Error Code Concerned Part Transfer Solenoid Confirm the connection of a transfer solenoid connector. Is ECN8 of IOD2 properly connected with a connector of the solenoid ? Connect them properly. Is ECN2 of IOD2 properly connected with DCN9 of IOD1 ? Is E5 error cleared ? Is DCN1 of IOD1 properly connected with 11CN of MCTL P.W.B ? Job is complete.
  • Page 285 Error Code Cleaning Brush Solenoid Concerned Part Confirm the connection of a cleaning brush solenoid connector. Connect them properly. Is ECN10 of IOD2 properly connected with a connector of the solenoid ? Is ECN2 of IOD2 properly connected with DCN9 of IOD1 ? Is E6 error cleared ? Is ECN1 of IOD1 properly connected with 11CN of MCTL P.W.B ? Job is complete.
  • Page 286 Error Code Cleaner Clutch Concerned Part Confirm the connection of a cleaner clutch connector. Connect them properly. Is ECN11 of IOD2 properly connected with a connector of the clutch ? Is ECN2 of IOD2 properly connected with DCN9 of IOD1 ? Is ECN1 of IOD1 properly connected with 11CN of MCTL P.W.B ? Is E7 error cleared ? Job is complete.
  • Page 287 Error Code Fuser Clutch(FUCL) Concerned Part Confirm the connection of a fuser clutch connector. Connect them properly. Is ECN9 of IOD2 properly connected with a connector of the clutch ? Is ECN1 of IOD2 properly connected with 11CN of MCTL P.W.B ? Is E8 error cleared ? Job is complete.
  • Page 288 Error Code Concerned Part Belt Sensor (P.B.S) 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. Confirm the connection of connector. Is E9 error cleared ? Connect them properly.
  • Page 289 Error Code Erase Lamp i EL j 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 P.W.B ? Is EL error cleared ? Job is complete.
  • Page 290 Error Code Concerned Part Fan Motor(Control Cooling) Confirm the connection of a fan motor connector. Connect them properly. Is DCN13 of IOD1 properly connected with a connector of the fan motor ? Is DCN1 of IOD1 properly connected with 11CN of MCTL P.W.B ? Is F0 error cleared ? Job is complete.
  • Page 291 Error Code Fan Motor i OZFAN j Concerned Part Confirm the connection of a fan motor connector. Connect them properly. Is ECN6 of IOD2 properly connected with a connector of the fan motor ? Is ECN1 of IOD2 properly connected with 11CN of MCTL P.W.B ? Is F2 error cleared ? Job is complete.
  • Page 292 Error Code Concerned Part Heater Fan i HTFAN j Confirm the connection of a heater fan connector. Connect them properly. Is DCN10 of IOD1 properly connected with a connector of the heater fan ? Is DCN1 of IOD1 properly connected with 11CN of MCTL P.W.B ? Is F4 error cleared ? Job is complete.
  • Page 293 Error Code Concerned Part High Voltage Unit iHVU j 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 294 H0 iwire cut/ short error of thermistor j Error Code Fuser Unit Concerned Part Confirm the connection of a fuser unit connector. Re-install the fuser unit. Is the fuser unit properly installed ? Is there any contact failure due to damaged connector of fuser unit ? Replace the charger unit or belt cartridge.
  • Page 295 Error Code H2,H3,H4 Fuser 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. Is the line voltage to be the default value ? Is the connector HP/HN connected ? Connect them properly.
  • Page 296 Error Code L1(Beam Detecting Error j Concerned Part Optical Unit Confirm the connection of an optical 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 optical unit.
  • Page 297 Error Code Optical Unit Concerned Part Connect the connector properly. Is the connector LCN3 properly connected ? Is L2 error cleared ? Replace the optical unit. Is L2 error cleared ? Replace the MCTL P.W.B. Job is complete. MCTL SCMCLK Optical Unit SCMRDY SCMON...
  • Page 298 Error Code Optical Unit Concerned Part Confirm the connection of an optical 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 optical unit.

  • Page 299: Imaging Failure

    8.3 Imaging Failure (1). Background ..........8-38 (2).

  • Page 300: Background

    No.1 Background Phenomenon Background is smeared due to the toner spread as shown in the print sample of upper right corner. Main Causes 1). Too small toner mass amount and charging amount in the development process. 2). Insufficient contact of the developer roller's bias pole. 3).

  • Page 301: Missing Image At Edge

    No.2 Missing Image at Edge Phenomenon There are missing or peeling found in the image at edge as shown in the print sample of upper right corner. Main Causes 1). Too small toner mass amount and charging amount in the development process. 2).

  • Page 302: Jitter

    No.3 Jitter Phenomenon Uneven optical density appears periodically in the horizontal direction of printed image as shown in the print sample of upper right corner. Main Causes 1). Failure of main motor. 1-1). Irregular rotation of the drive motor. 1-2). Failure of the gear. 1-3).

  • Page 303: Ribbing

    No.4 Ribbing Phenomenon Light print occurs in the right or left side of image as shown in the print sample of upper right corner. Main Causes 1). Slight tilt on the surface of printer installation table. (Tilt should be less than 1 ) 2).

  • Page 304: Wrinkle/Image Migration

    No.5 Wrinkle / Image Migration Phenomenon Banding shadows of different optical density appear due to the wrinkle, image migration and color misregistration occurring on the print paper as shown in the print sample of upper right corner. Main Causes 1). Paper in use is not a recommended paper, or is an abandoned paper. 2).
  • Page 305 No.6 White Line Phenomenon Vertical white line appears in the specific color area when test-printed in the four color mode (Stripe Mode), as shown in the print sample of upper right corner. Main Causes 1). Foreign particles adhere to Developer Roller of specific color in question. 2).
  • Page 306 No.7 White Line Phenomenon Vertical white line appears from the leading edge to the trailing edge of printed image as shown in the print sample of upper right corner. Main Causes 1). Dustproof Glass of Optical Unit is smeared with toner or foreign particles. 2).

  • Page 307: Vertical White Band

    No.8 Vertical White Band Phenomenon White band appears in the vertical direction of printed image as shown in the print sample of upper right corner. Main Causes 1). Silicone oil adheres to the transfer drum. Drum Cleaner Transfer Unit Trnsfer Drum Transfer Unit Paper Dischager Unit Adhered Silicone oil...

  • Page 308: Black Line

    No.9 Black Line Phenomenon Fine black line appears in the printed image as shown in the print sample of upper right corner. Main Causes 1). Wire grid of the charger unit is smeared. 2). OPC belt's surface is damaged. 3). Foreign particles (paper dust, etc.) are stuck in between the cleaning blade and OPC belt.

  • Page 309: Vertical Line

    No.10 Vertical Line Phenomenon Vertical line appears in the printed image as shown in the print sample of upper right corner. Main Causes 1). Foreign particles (dust, etc.) adhere to the parts located around the transfer drum, and consequently contact the toner image on the transfer drum. (4) Drum Cleaner Fusing Unit OPC Belt Cartridge...

  • Page 310: Vertical Staggering Image

    No.11 Vertical Staggering Image Phenomenon Printed image staggers in the vertical direction as shown in the print sample of upper right corner. Main Causes 1). Shock or vibration is applied to the printer. 2). Failure of the optical unit: Vibration from the rotation of scanner motor. Holes Cover C Interlock...

  • Page 311: Banding

    No.12 Banding Phenomenon Banding line appears in the horizontal direction as shown in the print sample of upper right corner. Main Causes 1). This is a transfer failure due to the uneven rotational speed caused by the shock which occurs when the seam of OPC belt passes over the cleaning blade. OPC Belt Cartridge Cleaning Belt Belt Seam...

  • Page 312: White Band

    No.13 White Band Phenomenon White banding line appears in the horizontal direction, and consequently causes a missing image as shown in the print sample of upper right corner. Main Causes 1). Installation failure of the transfer unit, and deformation of the transfer roller. 2).

  • Page 313: Toner Drop

    No.14 Toner Drop Phenomenon Toner spot stain is caused on the print by the toner dropping within the printer engine as shown in the print sample of upper right corner. Main Causes 1). Toner drops on the transfer drum due to the breakdown of the waste toner feeder's drum cleaner.

  • Page 314: White Spot / Black Spot

    No.15 White Spot / Black Spot Phenomenon White spot and black spot appear on the print as shown in the print sample of upper right corner. Main Causes 1). Foreign particles adhering to the OPC belt or transfer drum. 2). OPC belt or transfer drum is damaged. 3).

  • Page 315: Mixed Color Image

    No.16 Mixed Color Image Phenomenon Mixed color image appears in the print as shown in the print sample of upper right corner. Main Causes 1). Failure of toner cartridge: Blade pressure of the developer roller is inappropriate or the blade is deformed. 2).

  • Page 316: Color Misregistration

    No.17 Color Misregistration Phenomenon Color misregistration is caused between the two colors as shown in the print sample of upper right corner. Main Causes 1). OPC belt cartridge is not properly installed. 2). OPC belt cartridge is deformed. 3). Cleaning brush is unstable in the operation. 4).

  • Page 317: Mottle

    No.19 Mottle Phenomenon Variation of the optical density is found in the image as shown in the print sample of upper right corner. Main Causes 1). Transfer unit is not fixed in place. 2). Assembly of the transfer roller is inaccurate. 3).

  • Page 318: Residual Image

    No.20 Residual Image Phenomenon Image of the preceding page appears every other page as shown in the print sample of upper right corner. Main Causes 1). Cleaning failure due to the lifted cleaning brush of drum cleaner. 2). Contact failure of the drum cleaner's bias pole. 3).

  • Page 319: Insufficient Gloss

    No.21 Insufficient Gloss Phenomenon Gloss of the print is not sufficient as shown in the print sample of upper right corner. Main Causes 1). Cleaning roller is stained. 2). Fuser roller is deteriorated. Fusing Unit Cleaning Roller Oil Bottle Fuser Roller Back-up Roller Countermeasures 1).

  • Page 320: Back Stain

    No.22 Back Stain Phenomenon Back side of the print paper is stained as shown in the print sample of upper right corner. Main Causes 1). Fuser Unit: 1-1). Cleaning pad is stained. 1-2). Silicone oil is short. 1-3). Fuser roller and back-up roller is stained. Fusing Unit Cleaning Roller Oil Bottle...

  • Page 321: White Print

    No.23 White Print Phenomenon Blank page (no print at all) is outputted or specific color is missing (not printed) as shown in the print sample of upper right corner. Main Causes 1). Laser light path is blocked by paper or other material stuck at opening of optical unit. 2).

  • Page 322: Insufficient Fusing

    No.24 Insufficient Fusing Phenomenon Printed image is partially missing as shown in the print sample of upper right corner. This proves that the fusing is insufficient. Main Causes 1). Wrong selection of print media (label or envelope, etc.) at the Host side. 2).
  • Page 323 9. Parts List 1) Replaceable Unit Parts ....... . .9-1 2) Covers and Power Cord .
  • Page 324 SPARE PARTS LIST for SL1 COLOR LASER PRINTER 1. Replaceable Unit Parts ILLUST. Lead CLASS Name of Parts Q'ty/Unit Remarks Number Parts Code Time 1- 1 Toner Cartridge (Y) 30129001 6,000 images 1- 2 Toner Cartridge (M) 30129002 6,000 images...
  • Page 325 SPARE PARTS LIST for SL1 COLOR LASER PRINTER 2. Covers and Power Cord ILLUST. Lead CLASS Name of Parts Q'ty/Unit Remarks Number Parts Code Time 1-48 Power Cord (US) 126148 1-49 Power Cord (JP) 126149 1-51 Paper Casette 126151 2- 8...
  • Page 326 SPARE PARTS LIST for SL1 COLOR LASER PRINTER 3. Layout of Right Side and Front ILLUST. Lead CLASS Name of Parts Q'ty/Unit Remarks Number Parts Code Time 2-14 Front Cover Unit 126113 3-52 Paper Feeding Clutch 126152 3-53 Registration Clutch...
  • Page 327 SPARE PARTS LIST for SL1 COLOR LASER PRINTER 4. Layout of Left Side ILLUST. Lead CLASS Name of Parts Q'ty/Unit Remarks Number Parts Code Time 2-71 MCTL P.W.B. 126171 2-74 High Voltage Unit (HVU) 126174 3-46 Power Supply Unit (EC)
  • Page 328 SPARE PARTS LIST for SL1 COLOR LASER PRINTER 5. Layout of Top Side and Rear Side ILLUST. Lead CLASS Name of Parts Q'ty/Unit Remarks Number Parts Code Time 2-12 Panel Button 126111 2-13 Panel P.W.B. 126112 3-26 Waste Toner Feeder (U)
  • Page 329 SPARE PARTS LIST for SL1 COROR LASER PRINTER 6. Fuser Unit Parts ILLUST. Lead CLASS Name of Parts Q'ty/Unit Remarks Number Parts Code Time 3-30 * Fusing Heater(US) 123857 Lamp and Holder Set 3-31 * Fusing Heater(EC) 123858 Lamp and Holder Set...
  • Page 330 27 28 29...
  • Page 334 Model SL1 Series Hitachi, Ltd. Important Note Read this Manual thoroughly before assembling the lower feeder unit to Hitachi color laser printer, and understand well the procedures and safety precautions set out in this document. This Manual is recommended to be kept at handy for use.
  • Page 335 FCC Notice WARNING This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of FCC Rules. These limits are specified to provide the reasonable protection against harmful interference in a residential installation. Since this equipment generates, uses, and radiates the radio frequency, it may cause harmful interference to the radio communications if not installed or used in accordance with the instructions set out hereunder.
  • Page 336 Ozone Gas Caution SL1 is provided with the ozone filter in order to reduce exhausted ozone in compliance with Product Safety Standards. Ozone filter must be replaced with new filter yearly, otherwise, it may cause strong odor which will likely have ill effects to bronchial tubes.
  • Page 337 SAFETY INSTRUCTIONS 1. Safety Instructions 1.1 Safety Principle (1). Before starting your operation, read this Manual thoroughly. Especially, read the safety instructions of this section carefully and understand the contents. (2). Perform all the operations by following the procedures described in this Manual.
  • Page 338 (1). Introductory Information (..continue) . Understanding Signal Words DANGER is used to indicate the presence of a hazard which will cause severe human injuries or fatal accident if the warning is ignored. WARNING is used to indicate the presence of a hazard or unsafe practices which may cause severe human injuries or fatal accident if the warning is ignored.
  • Page 339 . Follow Safety Instructions (..continue) WARNING HARMFUL OZONE GAS Inhalation of excessive amount of ozone gas may adversely affect the respiratory organs. Ozone Filter is provided to this printer to reduce the exhausted ozone. This filter must be replaced with new filter periodically in accordance with the Manual attached to this printer.
  • Page 340 . Follow Safety Instructions (..continue) CAUTION HAZARDOUS POWDER Toner is fine powder to cause powder explosion if dumped into the fire. Strictly refrain from dumping toner into the fire for disposal. CAUTION HAZARDOUS POWDER Toner is fine powder to cause troubles to eyes and respiratory organs if inhaled.
  • Page 341 Preface We thank you very much for your purchasing Hitachi color laser printer SL1 and lower feeder unit (LFU-1). This assembly manual provides the assembly procedures how to install your lower feeder unit to Hitachi color laser printer SL1 series, as well as the handling precautions.
  • Page 342 Contents 1. Outline of Product ......9 1.1 Name & Function of Each Component ....9 2.

  • Page 343: Outline Of Product

    1. Outline of Product 1.1 Name & Function of Each Component Name Function Paper Cassette Cassette to feed paper automatically. Cassette to guide paper from paper Paper Guide cassette to printer. Clutch to transport paper from paper Paper Feeding Clutch cassette.

  • Page 344: Specification Of Product

    2. Specification of Product 2.1 Rating Item Specification Applicable Printer Hitachi Color Laser Printer SL1 Series Paper : 250 sheets Cassette Capacity : 50 sheets Letter, Legal, A4, Executive, B5, Printable Media OHP, Label. 500(W) 484(D) 116(H) (mm) Appearance 139(W) 134.5(D) 32.2(H) (inch) Approximately 8kg [17.6lb]...

  • Page 345: Assembly Procedures

    3. Assembly Procedures 3.1 Installation Conditions Installation conditions of lower feeder unit is the same as printer engine. Laser beam printer is susceptible to the environment of installation location. Printer may not be able to perform the expected function and operation if installed in an inappropriate location.

  • Page 346: Unpacking Procedures

    3.2 Unpacking Procedures 1 . Remove the tape of upper face. 2 . Take out the side cover R/L. 3 . Remove the upper packing. 4 . Take out the lower feeder unit (cassette and guide R/L inclusive). Packing List Side Cover R Side Cover L Name of Parts...

  • Page 347: Assembly Procedures

    3.3 Assembly Procedures (1). Installation of Lower Feeder Unit to Printer (LFU) Precautions 1 . Lay the lower feeder unit on the solid and flat surface of set-up table. ). Leave the set-up guide as fixed to the lower feeder unit (LFU). Set-Up Guide (L) Set-Up Guide (R) Lower Feeder Unit...
  • Page 348 Assembly Procedures (1). Installation of Lower Feeder Unit (LFU) to Printer (... continue) Caution Printer engine weighs approximately 32kg. Do not attempt to carry the printer engine by yourself, because it is dangerous for one person to move. It may require two adults or more to move this printer. Since this printer is a precision equipment, move it slowly without giving any shock whenever relocated.
  • Page 349 Assembly Procedures (1). Installation of Lower Feeder Unit (LFU) to Printer (... continue) 5 . Install a metal fixture of the left side as viewed from the front side of printer engine. ). Confirm that there are metal fixtures (2 pcs.) and knob screws (2 pcs) in the bag packaged in the same box of LFU.
  • Page 350 Assembly Procedures (1). Installation of Lower Feeder Unit (LFU) to Printer (... continue) 6 . Following above procedures implemented for the left side, Install the metal fixture of the right side as viewed from the front side of printer engine. Knob Screw...
  • Page 351 Assembly Procedures (2). Installation of Connector Cable to Printer Engine 1 . Remove LF connector cover U from the rear side of printer engine. LF Connector Cover LFU Signal Connector 2 . Connect the LFU signal connector to the connector of printer engine side. Caution Push the LFU signal connector into the connector of printer engine side until it clicks (locked).
  • Page 352 Assembly Procedures (3). Installation of Cover 1 . Install the side cover R. ). Let the lock ( projection ) of side cover R ( inside ) meet the another lock ( recess ) of engine side. 2 . Install the side cover L. ).
  • Page 353 Assembly Procedures (4). Relocation of Printer 1 . Whenever the printer is relocated, it requires more than two adults to move the printer as shown below: Printer Engine Caution Since the printer with the LFU installed weighs approximately 40kg, do not attempt to move the printer by yourself. In case the printer and the LFU is relocated individually (separately), make sure to disconnect the connection of LFU signal connector prior to lifting the printer engine from the LFU.

  • Page 354: Test Drive And Test Print

    4. Test Drive and Test Print For the details of test drive and test print, see the chapter 4 of Operation Manual. Paper Feeding From Lower Cassette 1). Load papers only to the paper cassette of LFU. 2). Implement the test print.

  • Page 355: Clearance Of Paper Jam

    5. Clearance of Paper Jam 5.1 Paper Feeding Jam 1 . Pull out the paper cassette (L). 2 . Remove the paper remaining inside of engine. 3 . Open up the transfer unit, and confirm no remaining paper. 4 . Press the clear key. 5.2 Inner Jam &...

  • Page 356: Periodic Maintenance

    6. Periodic Maintenance Daily Maintenance There is no part in the LFU to require daily maintenance such as cleaning etc. Periodic Maintenance There is no part in the LFU to require periodic replacement. However, it is recommended for good performance of paper feeding that the following parts will be replaced in accordance with the periodic replacement cycle of counter parts of engine side.

  • Page 357: Replacement Procedures Of Main Parts

    7. Replacement Procedures of Main Parts Paper Sensor (PEL) / OHP Sensor (OHPL) Necessary Tool 1 . Phillips Screwdriver #1 and #2. Disassembly Procedures 1 . Remove a side cover (R). [No tool is necessary] 2 . Remove a back cover (LFU). [Remove screw BT4 8 (1 pc.)] 3 .

  • Page 358: Paper Size Sensor (Psl) And Ohp Sensor (Ohpl)

    Paper Size Sensor (PSL) Necessary Tool 1 . Phillips Screwdriver. Disassembly Procedures 1 . Remove a side cover (L). [No tool is necessary] 2 . Remove a base cover (L). [Remove screws BT4 8 (2 pcs.)] 3 . Remove the front cover (LFU). [Remove screws ST3 6 (2 pcs.)] 4 .

  • Page 359: Paper Feeding Clutch (Pkcll)

    Paper Feeding Clutch (PKCLL) Necessary Tool 1 . Phillips Screwdriver #1 and #2. Disassembly Procedures 1 . Remove a side cover (R). [No tool is necessary] 2 . Remove a base cover (R). [Remove screws BT4 8 (2 pcs.)] 3 . Remove a back cover (LFU). [Remove screw BT4 8 (1 pc.)] 4 .

  • Page 360: Paper Feeding Roller (Lfu) / Separator Pad

    Paper Feeding Roller (LFU) / Separator Pad Necessary Tool 1 . Phillips Screwdriver #1 and #2. Disassembly Procedures 1 . Remove a side cover (R). [No tool is necessary] 2 . Remove a back cover (LFU). [Remove screw BT4 8 (1 pc.)] 3 .

  • Page 361: Main Parts Of Lower Feeder Unit

    8. Main Parts of Lower Feeder Unit See attached drawing 5 for the details of structure. Main Parts List Name of Parts Illust. No. Parts Code Function To sense the availability of Paper Sensor 126167 paper. To sense the size of paper Paper Size Sensor 126166 in the paper cassette.
  • Page 362 (LFU) ¿ « § Back Cover (LFU) ¯ (LFU) § ¤ Paper Guide (LFU) ˜ § (LFU) Ø Front Cover (LFU)

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