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LBP-1760
SERVICE
MANUAL
REVISION 0
RY8-1387-000
MAY 1998
COPYRIGHT
1998 CANON INC.
CANON LBP-1760 REV. 0 MAY 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)

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   Summary of Contents for Canon LBP-1760

  • Page 1: Service Manual

    LBP-1760 SERVICE MANUAL REVISION 0 RY8-1387-000 MAY 1998 COPYRIGHT 1998 CANON INC. CANON LBP-1760 REV. 0 MAY 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
  • Page 2 COPYRIGHT © 1998 CANON INC Printed in Japan Imprimé au Japon Use of this manual should be strictly supervised to avoid disclosure confidential information. Prepared by PERIPHERAL PRODUCTS QUALITY ADVANCEMENT DIV. PERIPHERAL PRODUCTS TECHNICAL DOCUMENTATION DEPT. CANON INC. 5-1, Hakusan 7-chome, Toride-City, Ibaraki-Pref. 302-8501, Japan...
  • Page 3: Chapter 1 Product Information

    PREFACE This Service Manual contains basic information required for after-sales service of the laser beam printer LBP-1760 (here after referred to as the “printer”). This information is vital to the service technician in maintaining the high print quality and performance of the printer. The paper feeder, envelope feeder and duplexing unit, which are prepared for the printer as options, are described in this manual.
  • Page 4 DTP system This manual was produced on an Apple PowerMacintosh 9500/200 personal computer and output by an Apple LaserWriter 16/600 PS laser beam printer. All graphics were produced with Macromedia FreeHand (J), and all documents and page layouts were created with QuarkXPress (E). The video images were captured with SONY degital video camcorder and MASS microsystems Quickimage 24 video capture board, and modified with Adobe Photoshop (J).
  • Page 5: Table Of Contents

    CONTENTS CHAPTER 1 PRODUCT INFORMATION FEATURES ......1-1 VI. MAINTENANCE AND SPECIFICATIONS....1-3 SERVICING BY THE III. SAFETY INFORMATION..1-6 CUSTOMER ......1-19 IV. PARTS OF THE PRINTER ..1-7 VII. OPERATION......1-20 INSTALLATION ....... 1-12 CHAPTER 2 OPERATION AND TIMING BASIC OPERATION ....
  • Page 6 A. Cassette Pick-up Roller ..3-11 DEVELOPING/CLEANING B. Cassette Feed Roller..3-11 SYSTEM ......... 3-20 C. Separation Roller ....3-12 A. EP-52 Cartridge ....3-20 D. Multi-purpose Tray B. Transfer Charging Roller ... 3-21 Pick-up Roller ....3-12 VI. FIXING SYSTEM ..... 3-23 E.
  • Page 7 APPENDIX GENERAL TIMING CHART ..A-1 III. LIST OF SIGNALS ....A-5 GENERAL CIRCUIT DIAGRAM A-3 IV. MESSAGE TABLE ....A-11...
  • Page 9 CHAPTER 1 PRODUCT INFORMATION FEATURES ......1-1 VI. MAINTENANCE AND SPECIFICATIONS....1-3 SERVICING BY THE III. SAFETY INFORMATION..1-6 CUSTOMER ......1-19 IV. PARTS OF THE PRINTER ..1-7 VII. OPERATION......1-20 INSTALLATION ....... 1-12...
  • Page 11: Features

    7. Automatic PDL switch This printer supports the Hewlett-Packard PCL6 printer language. It can also support the Adobe PostScript 3 by installing the optional Canon Adobe PostScript 3 Module A5. It automatically switches PDL between PCL and PostScript according to the received data.
  • Page 12 CHAPTER 1 This page intentionally left blank 1 - 2...
  • Page 13: Specifications

    CHAPTER 1 II. SPECIFICATIONS A. Printer 1. Printer Engine 1) Type Desk-top page printer 2) Printing method Electrophotography 3) Printing speed (Note 1) About 17.1 pages/min. (Letter, 600 DPI), about 8.5 pages/min. (Letter, 1200 DPI) About 16.2 pages/min. (A4, 600 DPI), about 8.1 pages/min. (A4, 1200 DPI) 4) First print time (Note 2) 15.2 sec.
  • Page 14 CHAPTER 1 ed paper). Manual duplexing (Note 3) Plain paper (60g/m ~ 105g/m recommended paper) on multi- purpose tray only 11) Environment Temperature 7.5 ~ 32.5°C Humidity 5 ~ 90%RH Air pressure 747 ~ 1013hPa (560 ~ 760mmHg/equivalent to 0 ~ 2,600m above the sea level) 12) Power consumption 1100W or less (20°C room temperature, with rated voltage input)
  • Page 15 CHAPTER 1 B. Options 1. Paper feeder 1) Paper source Letter, Legal, Executive, A4, B5-JIS, B5-ISO, and Custom-sized plain paper (60g/m ~ 105g/m recommended paper), recycled paper, colored paper 2) Capacity 56mm stack (about 500 sheets of 80g/m paper) 3) Dimensions 390 (W) 493 (D) 129 (H) mm...
  • Page 16: Safety Information

    CHAPTER 1 III. SAFETY INFORMATION A. Laser Safety An invisible laser beam is irradiated within the laser/scanner unit. Since the laser beam can injure your eye, be sure not to disassemble the laser/scanner unit. Also, it cannot be adjusted in the field. The label shown below is attached to the laser/scanner unit cover.
  • Page 17: Parts Of The Printer

    CHAPTER 1 IV. PARTS OF THE PRINTER A. External Views 1. Printer 1: Face-down tray 2: Face-up tray 3: Operation panel 4: Right rear cover 5: Power switch 6: Cassette 7: Multi-purpose tray 8: Top cover Figure 1-4-1 9: Test print switch 10: Parallel interface connector 11: Power receptacle 12: Expansion I/O slots...
  • Page 18 CHAPTER 1 2. Paper feeder 1: Paper feeder 2: 500-sheet cassette Figure 1-4-4 3. Duplexing unit 1: Duplexing unit jam release cover Figure 1-4-5 4. Envelope feeder 1: Envelope guide 2: Extension tray 3: Weight Figure 1-4-6 1 - 8...
  • Page 19 CHAPTER 1 B. Cross-sectional Views 1. Printer 1 1 1 0 Figure 1-4-7 1: Face-up deflector 12: Cassette 2: Face-down delivery roller 13: Separation pad 3: Fixing film unit 14: Feed rollers 4: Laser/scanner unit 15: Cassette separation roller 5: Primary charging roller 16: Cassette feed roller 6: Developing cylinder 17: Cassette pick-up rollers...
  • Page 20 CHAPTER 1 2. Paper feeder Figure 1-4-8 1: Pick-up roller 2: Feed roller 3: Separation roller 3. Duplexing unit Figure 1-4-9 1: Reversing roller 2: Oblique rollers 3: Duplexing unit pick-up rollers 1 - 10...
  • Page 21 CHAPTER 1 4. Envelope feeder Figure 1-4-10 1: Feed rollers 2: Separation rollers 3: Separation guide 4: Pick-up rollers 5: Weight 1 - 11...
  • Page 22: Installation

    CHAPTER 1 V. INSTALLATION A. Outline This printer is packaged and shipped from the factory after careful adjustments and rigorous inspections. When installing the printer, it is important to demonstrate its performance in the same way as when it passed the factory inspection. The service engineer must sufficiently understand the performance of the printer, install it correctly in a location with an appropriate environment, and conduct sufficient checks of the unit.
  • Page 23 CHAPTER 1 1220mm 100mm Figure 1-5-1 1 - 13...
  • Page 24 CHAPTER 1 C. Unpacking and Installation Condensation appear on metal surfaces in the printer when brought from a cold area into a warm area. Also, since the condensation can cause various troubles including print defects, in such a case, leave it in the carton at room temperature for at least an hour so that it is accli- matized to room temperature.
  • Page 25 CHAPTER 1 6. Operation confirmation 1) Load paper in the cassette. 2) Plug the power cord into the printer and outlet, and turn the power switch ON. Be sure to use the enclosed power cord. 3) After the printer enters the STANDBY mode, press the test print switch to make a test print. Check if the density of the output image is correct.
  • Page 26 CHAPTER 1 D. Storing, Handling the EP-52 Cartridge Whether the cartridge is still sealed in its box or installed in the printer, the effect of the natur- al environment will change it over time regardless of the number of prints. As the progression of this natural change depends on the storage or installation environment, take sufficient care in storing and handling the cartridges.
  • Page 27 CHAPTER 1 2. Effective life Cartridges are effective for 2.5 years following the date of manufacture, which is displayed in an abbreviated form on the cartridge. The cartridge life span is also displayed (month and year) on the cartridge box as 2.5 years from the date of manufacture. Cartridges should be used within their life spans, as image quality will deteriorate after the expiry date.
  • Page 28 CHAPTER 1 Figure 1-5-3 1 - 18...
  • Page 29: Maintenance And Servicing By The Customer

    CHAPTER 1 VI. MAINTENANCE AND SERVICING BY THE CUSTOMER Table 1-6-1 shows the maintenance the customer should conduct to ensure optimum machine performance at all times. Table 1-6-1 Item Customer maintenance Cartridge Rock the cartridge or replace it, if necessary. Transfer guide Clean the transfer guide when replacing the cartridge.
  • Page 30: Operation

    CHAPTER 1 VII. OPERATION A. The Operation Panel The operation panel is used to perform basic printer operations, make printer configuration changes that software applications cannot control, identify available typefaces, and check the status of the printer. The operation panel consists of the status indication display, three indicator lights, and six menu and operation keys.
  • Page 31 CHAPTER 1 The printer is processing a print job. OFF: There is no data stored in printer memory. • Alarm indicator: 4 An error has occurred and printing has stop. OFF: Operation in normal and there is no error. • Menu key: 5 With the printer off-line, press the Menu key to scroll through the menu names and return to the first menu name.
  • Page 32 CHAPTER 1 B. Operation Panel Menus You can access the following menus though the operation panel: • PCL MENU • FEEDER MENU • CONFIG MENU • MEMCONFIG MENU • PARALLEL MENU • ETHERNET MENU • TOKEN RING MENU • TEST MENU •...
  • Page 33 CHAPTER 1 4. Resetting the default values The printer can be reset in three ways: The reset printer function (RESET=PRINTER) clears the memory of all fonts, macros or page information and does not affect the menu settings. The reset menu function (RESET=MENU) clears the memory of all fonts, macros, and page information and restores most of the menu settings to their factory defaults.
  • Page 34 CHAPTER 1 This page intentionally left blank 1 - 24...
  • Page 35 CHAPTER 1 Menus Operation Flow At : Press : To move : Menu Forward Menu level Shift and Menu Back READY Press the Go key to take the printer off-line. Item Forward Item level Shift and Item Back Value Forward Press the Item key to select the item.
  • Page 37: Operation And Timing

    CHAPTER 2 OPERATION AND TIMING 1. This chapter describes the printer functions, the relationships between mechanisms and cir- cuits, and the timing of operations. Mechanical linkages are indicated by black and white lines ( ), the flow of control signals by solid arrows ( ), and the flow of groups of signals by outline arrows ( 2.
  • Page 39: Basic Operation

    CHAPTER 2 I. BASIC OPERATION A. Functions Printer functions can be divided into five groups: the engine control system, laser/scanner sys- tem, the image formation system, paper pick-up/feed system, and the video control system. VIDEO CONTROL SYSTEM Operation panel To external device (host computer,etc.). Video controller PCB Face-down tray ENGINE CONTROL SYSTEM...
  • Page 40: Basic Operation Sequences

    CHAPTER 2 B. Basic Operation Sequences The operation sequences of this printer are controlled by the microprocessor on the engine con- troller PCB. The purposes of periods from power ON until the main motor stops after the com- pletion of printing are described below. See the appendix for timing chart. Table 2-1-1 Periods Purposes...
  • Page 41: Power On Sequence

    CHAPTER 2 C. Power ON Sequence The sequence from power ON until the engine controller enters the STBY mode is shown below. 1) Power ON 2) CPU initialization 3) Fan motor drive 4) Pick-up unit configuration detection 5) Video interface communication start Outputs /PPRDY signal.
  • Page 42: Engine Control System

    CHAPTER 2 II. ENGINE CONTROL SYSTEM A. Engine Controller PCB 1. Outline The operation sequences of this printer are controlled by the CPU of this circuit. When the power switch of the printer is turned ON and the printer enters the STANDBY mode, the CPU outputs the signals to drive the loads such as laser diode, motors, and solenoids, based on the print commands and the image data input from the external device.
  • Page 43 CHAPTER 2 2. Operation of each block a. CPU (IC501) The CPU is a 8-bit 1-chip microprocessor. It is a 1-chip type CPU with built-in ROM and RAM. According to the control programs stored in the ROM, it controls the following operations of the printer.
  • Page 44 CHAPTER 2 3. Engine controller inputs/outputs Engine controller PCB +3.3V PS102 J111-3 J57-1 Pre-feed /PRE SNS "L" when sensor detects paper. sensor +3.3V PS103 J112-3 J57-4 Top of page /TOP SNS "L" when sensor detects paper. sensor +3.3V PS104 J113-3 J60-1 Face-down "H"...
  • Page 45 CHAPTER 2 Engine controller PCB Paper size detection PCB +24V PS101 J110-3 J602-1 Cassette J603-5 J72-10 "L" when there is paper /1st SNS paper sensor in the cassette. SW600 J603-4 J72-11 /1st SIZE0 Detects the paper size Paper size SW601 by the combination of detection /1st SIZE1...
  • Page 46 CHAPTER 2 Engine controller PCB H901 J134-2 TB10 J135-2 J141-1 NEUTRAL Fixing heater Fuse J135-1 TB11 J134-1 J141-2 FU901 High-speed rotation at about 24V, J54-1 and low-speed rotation at about 18V /FON FM101 Cooling fan FLOCK "H" when the fan is locked. +24VA J126-2 J125-2...
  • Page 47 CHAPTER 2 Engine controller PCB Laser/scanner unit +24VA J401-4 J53-1 Scanner /ACC Scanner motor acceleration signal motor Scanner motor deceleration signal /DEC +3.3V J551-3 J53-5 BD PCB /BDI BD input signal (pulse signal) J501-6 J53-8 Switches to the light intensity of 1200DPI when "H." HALF Laser Turns the laser ON compulsively when "L."...
  • Page 48: Fixing Control

    CHAPTER 2 B. Fixing Control 1. Fixing temperature control The fixing film unit contains a fixing heater of a flat stick shape, which heats the fixing film. The temperature of the fixing heater is detected by the thermistor (TH901) on the fixing heater.
  • Page 49 CHAPTER 2 The printer does not supply power to the fixing heater in the STANDBY mode. The CPU detects the temperature of thermistor based on the FSRTH signal when the /PRNT signal is input and right before the main motor is driven. If it is below the specified tempera- ture, at the same time as the main motor rotation reaches the specified speed, the CPU rises the temperature to the specified value.
  • Page 50 CHAPTER 2 2. Fixing heater safety circuit This circuit is located on the engine controller PCB, and constantly monitors the abnormal rise of fixing temperature. In case of abnormality, the output from this circuit turns OFF the relay (RL101) and inter- rupts the power to the fixing heater.
  • Page 51 CHAPTER 2 c. Heater broken wire detection The CPU detects heater broken wire in the following cases and assesses warm-up error or abnor- mally low temperature. 1) The thermistor, in the low-temperature detection mode, does not rise +10 C from the initial temperature within about 2.5 seconds after the heater is turned ON.
  • Page 52: High-voltage Power Supply

    CHAPTER 2 C. High-Voltage Power Supply Circuit 1. Outline Engine controller PCB IC501 High-voltage Current detection circuit control IC Primary Superimpose charging Amplifier TB62 Inverter Primary charging transformer AC control Voltage detection Primary charging Primary charging roller output control circuit Inverter Drive (density volume...
  • Page 53 CHAPTER 2 The primary DC bias changes with the developing DC bias according to the IMAGE DENSITY ADJUSTMENT signal sent from the CPU. b. Developing bias generation When the DEVELOPING DC BIAS FREQUENCY OUTPUT signal is output from the CPU, the cir- cuit applies the developing DC bias to the developing cylinder.
  • Page 54: Low-voltage Power Supply Circuit

    CHAPTER 2 D. Low-Voltage Power Supply Circuit 1. Outline AC power is supplied to the low-voltage power supply circuit in the engine controller when the power switch (SW101) is turned ON. The low-voltage power supply circuit supplies +24VDC and +3.3VDC required for the printer. +24VDC is supplied to drive the main motor, scanner motor, and fan and to the high-voltage power supply.
  • Page 55: Video Interface Control

    CHAPTER 2 E. Video Interface Control 1. Outline To connect the printer to an external device, such as a host computer, a video controller PCB is needed. This section explains the kinds of interface signals exchanged between the engine controller and the video controller, and gives information concerning the sequence of printer operation making use of the interface signals.
  • Page 56 CHAPTER 2 b. Video interface signal Video controller PCB Engine controller PCB /PPRDY /RDY /TOP /SBSY /STS /CCRT /PCLK /CBSY /PRNT /PRFD /CPRDY /VDO /CMD /CCLK /PDLV /PFED Figure 2-2-10 2 - 18...
  • Page 57 CHAPTER 2 2. Operation When the power is switched ON, the printer enters the WAIT mode. At the end of the WAIT mode, the engine controller sends the READY signal (/RDY) to the video controller to inform that printer is ready to print. When the /RDY signal is “L”...
  • Page 58: Other Controls

    CHAPTER 2 F. Other Controls 1. Main motor control Figure 2-2-11 shows the main motor control circuit. Engine controller PCB Main motor +24VA J52-3 J301-5 +3.3V IC501 M101 J301-4 J52-4 /MRDY J301-6 J52-2 92 /MRDY +3.3V /HALF J52-1 J301-7 /MON J52-5 J301-3 73 MON...
  • Page 59 CHAPTER 2 2. Fan motor control The printer has a fan motor as a cooling (air inlet) fan. Figure 2-2-12 shows the fan motor control circuit. Engine controller PCB Cooling fan +24VA FM101 J54-1 /FON FHALF +3.3V IC501 J54-2 FLOCK FLOCK J54-3 +3.3V...
  • Page 60: Laser/scanner System

    CHAPTER 2 III. LASER/SCANNER SYSTEM A. Outline Engine Video controller controller Scanner motor Scanning mirror /ACC Focusing lens /DEC Mirror Cylindrical lens BD mirror Laser driver /TOP /VDO HALF /LON /ENBL /VDO /BDI Figure 2-3-1 The VIDEO signal (/VDO) is sent from the video controller to the laser driver of the laser/scan- ner unit through the engine controller.
  • Page 61: Laser Control Circuit

    CHAPTER 2 B. Laser Control Circuit 1. Outline Engine controller PCB Laser driver PCB IC501 (Photo Diode) (Laser Diode) Laser driver IC J53-8 J501-6 J53-10 /LON J501-4 /LON Drive J53-11 /ENBL J501-3 Logic /ENBL circuit circuit J51-10 /PRNT J53-12 /VDO J501-2 Control Power...
  • Page 62 CHAPTER 2 2. Automatic power control of laser diode The laser driver IC conducts the automatic power control (APC) of the laser diode so that the laser diode emits a beam of constant intensity. When the FORCED LASER ON signal (/LON) becomes “L,” or the VIDEO DATA ENABLE sig- nal (/ENBL) and /VDO signal become “L,”...
  • Page 63 CHAPTER 2 2 mm 2 mm Figure 2-3-3 Notes: 1. The shaded area indicates the area where the laser beam writes on the drum. 2. The time T1 and T2 vary according to the paper size. If no paper size is specified by the paper size specification command from the video controller for multi-purpose tray pick-up, the printer does not recognize the paper width.
  • Page 64: Scanner System

    CHAPTER 2 C. Scanner System Figure 2-3-4 is the scanner motor control circuit. Engine controller PCB Laser/scanner unit /BDI J551-2 J53-6 BD PCB Scanner motor +24VA +24VA J53-1 J401-4 Scanner driver IC /ACC J53-2 J401-3 /ACC Frequency Integration Drive comparator circuit circuit /DEC...
  • Page 65 CHAPTER 2 is rotating at the prescribed speed or not. The CPU notifies the scanner failure to the video controller in the following cases: 1) The /BDI signal is not input for about 100ms continuously at the scanner motor start or stop.
  • Page 66: Image Formation System

    CHAPTER 2 IV. IMAGE FORMATION SYSTEM A. Outline The image formation system is the central hub of the printer, and consists of the photosensitive drum, developing unit, charging rollers, etc. When the PRINT signal (/PRNT) is sent from the video controller to the engine controller, the engine controller drives the main motor to rotate the photosensitive drum, developing cylinder, primary charging roller, and transfer charging roller.
  • Page 67 CHAPTER 2 Laser beam Cartridge Primary charging roller Blade Developing Multi-purpose tray Cleaner blade cylinder Fixing film unit pick-up roller Photosensitive drum Static charge Pressure roller eliminator Transfer charging roller Cassette pick-up roller /PRNT Video controller PCB Engine controller PCB /VDO Figure 2-4-1 2 - 29...
  • Page 68: Printing Process

    CHAPTER 2 B. Printing Process A major portion of the image formation system is contained in the cartridge as shown in Figure 2-4-2. Laser beam Cartridge Primary charging roller Blade Cleaner blade Developing cylinder Photosensitive drum Transfer charging roller Static charge eliminator Figure 2-4-2 This printer’s cartridge has a seamless drum of a double-layer construction as shown in Figure 2-4-3.
  • Page 69 CHAPTER 2 5. Drum cleaning block Step 7: Drum cleaning Electrostatic latent image formation block Paper path 2. Laser beam exposure Direction of drum rotation 1. Primary charge Developing block 3. Developing Drum cleaning block 7. Drum cleaning Fixing block Multi-purpose tray pick-up 5.
  • Page 70 CHAPTER 2 1. Electrostatic latent image formation block This block follows two steps to produce an electrostatic latent image on the photosensitive drum. When Step 2 of this block is completed, negative charge remains in the unexposed “dark” areas; however, those in the exposed “light” areas are eliminated. This image of negative charges on the drum is invisible to the human eye, so it is called an “electrostatic latent image.”...
  • Page 71 CHAPTER 2 Step 2: Laser beam exposure Laser beam Unexposed area Exposed area Figure 2-4-7 When the laser beam scans the drum surface, it causes the charges in the areas struck by the laser beam to be neutralized. These areas on the drum surface form the electrostatic latent image.
  • Page 72 CHAPTER 2 As shown in Figure 2-4-8, the developing unit consists of a fixed magnet, a developing cylinder and a rubber blade. The developing cylinder rotates around the fixed imagnet. The single-component toner consists of magnetite and a resin binder, and is held to the cylin- der by magnetic attraction.
  • Page 73 CHAPTER 2 Positive charges are applied to the back of the paper to attract the negatively charged toner par- ticles to the paper. Roller transfer method is applied to stabilize the paper feed and to reduce ozone generation. Step 5: Separation Photo- sensitive Paper...
  • Page 74 CHAPTER 2 method has fast temperature rising time and it is not necessary to supply power to the fixing heater during the standby mode. Wait time is shortened and energy conservation is made pos- sible by this method. Fixing film is cylindrical film of polyimide. Its surface is coated with fluorine to prevent off- set.
  • Page 75 CHAPTER 2 This page intentionally left blank 2 - 37...
  • Page 76: Pick-up/feed System

    CHAPTER 2 V. PICK-UP/FEED SYSTEM A. Outline Presence of paper in the multi-purpose tray is detected by the multi-purpose tray paper sensor (PS105). Presence of paper in the cassette is detected by the cassette paper sensor (PS101). The paper size in the cassette and whether the cassette is installed are detected by the three switches (SW600, 601, 602) on the paper size detection PCB.
  • Page 77 CHAPTER 2 Engine controller PCB Paper size detection PCB PS104 Main motor M101 Registration arm Pre-transfer roller Face-down delivery rollers PS106 SL102 CL101 Photosensitive drum PS102 Pressure PS103 Transfer SL101 PS501 roller charging roller PS105 Multi-purpose tray Feed rollers Paper size detection switches PS101 pick-up roller SW600...
  • Page 78: Paper Size Detection

    CHAPTER 2 B. Paper Size Detection By setting the cassette in the printer or the optional paper feeder, the specified switches are actuated. The combinations of actuated switches (Table 2-4-1) detect the paper size and whether there is a cassette or not. Table 2-4-1 Paper size detectionswitch Paper size...
  • Page 79: Cassette Pick-up

    CHAPTER 2 C. Cassette Pick-up a. Outline When the video controller inputs the /PRNT signal to the engine controller, the main motor (M1) starts rotation. When the main motor reaches its prescribed speed, the feed roller clutch (CL101) and cassette pick-up solenoid (SL101) are turned ON. As a result, the cassette pick-up roller, cassette feed roller, separation roller and feed rollers are driven by the main motor rota- tion.
  • Page 80 CHAPTER 2 Figure 2-5-3 2 - 42...
  • Page 81 CHAPTER 2 b. Multi-feed prevention mechanism When picking up the paper from the cassette, the printer uses the separation roller to prevent multi-feeding. Normally, the separation roller is imparted with a rotational force in the same direction as that of the feed roller. However, since the separation roller is equipped with a torque limiter, it rotates with feed roller by transmission of its rotational force via the transported paper.
  • Page 82: Multi-purpose Tray Pick-up

    CHAPTER 2 D. Multi-purpose Tray Pick-up The presence of paper on the multi-purpose tray is detected by the multi-purpose tray paper sensor (PS105). When the engine controller receives the /PRNT signal from the video controller, the printer starts the initial rotation. When the initial rotation ends (main motor warm-up, scanner motor warm-up, high-voltage control sequence, and fixing unit warm-up are completed), the multi- purpose tray pick-up solenoid (SL102) is turned ON.
  • Page 83 CHAPTER 2 Figure 2-5-6 2 - 45...
  • Page 84: Fixing And Delivery Unit

    CHAPTER 2 E. Fixing and Delivery Unit The pressure roller and delivery roller in the fixing unit are driven by the main motor (M1). The paper separated from the photosensitive drum is fed into the fixing unit by the feed belt. The toner is fused onto the paper by the fixing film and the pressure roller, and the paper is delivered from the fixing unit.
  • Page 85 CHAPTER 2 This page intentionally left blank 2 - 47...
  • Page 86: Paper Jam Detection

    CHAPTER 2 F. Paper Jam Detection The following paper sensors are installed to detect whether the paper is present or not and whether the paper is fed normally or not. • Pre-feed sensor (PS102) • Top of page sensor (PS103) •...
  • Page 87 CHAPTER 2 • For paper 200mm or more: T= about 3.2 sec. • For paper less than 200mm: T= about 5.7 sec. b. During paper feeding The CPU assesses a delivery delay jam if the fixing unit delivery sensor 2 (PS106) does not detect the leading edge of the paper within the prescribed period of time (about 0.47 sec.) after the PS501 detects the leading edge.
  • Page 88: Video Control System

    CHAPTER 2 VI. VIDEO CONTROL SYSTEM A. Video Controller Circuit 1. Outline Video controller circuit receives print data consisting of code or image data from external device (such as host computer) via interface cable. The circuit analyzes and processes the print data including the data specified by the opera- tion panel, and then converts them to the dot data.
  • Page 89 CHAPTER 2 EEPROM IC10 ASIC ROM DIMM0 ROM DIMM1 ROM DIMM2 RAM DIMM0 RAM DIMM1 Figure 2-6-1 2 - 51...
  • Page 90: Adapter Circuit

    CHAPTER 2 B. Adapter Circuit This circuit consists of three connectors and connects the video controller PCB with the network board (option). Adapter PCB Video controller PCB Optional network bord Firmware ROM DIMM Engine controller Parallel interface connector Optional RAM DIMMs Optional ROM DIMMs Figure 2-6-2 2 - 52...
  • Page 91 Video Controller PCB Block Diagram for Option for job Separator for Network Board for Option (72pin, 2slots) (50pin, JSIO) (50pin, PSIO) (72pin, 2slots) <J7/8> <J4/5> Extension I/O Extension I/O ROM DIMM RAM DIMM Adapter PCB (72pin, 1slot) ROM DIMM <J3> <J6>...
  • Page 93: Operation Panel

    CHAPTER 2 C. Operation Panel 1. Outline The operation panel has one LCD with 16 characters by 2 lines, six switches, and three LEDs. The operation panel is connected with the video controller PCB and has the following func- tions. a.
  • Page 94: Self Test

    CHAPTER 2 D. Self Test The printer has the function to check the condition of the video controller by executing the self diagnosis program of the video controller. This is called "self-test". Self-test has two kinds of test; power ON self test and power ON key sequence. 1.
  • Page 95 CHAPTER 2 displayed. Releasing the key clears the LED and the message. 6) If the Item key is pressed, all the LEDs are lit and the left half of the LCD (8 columns/both rows) is illuminated. Releasing the key clears the LEDs and the display. 7) If the Value key is pressed, all the LEDs are lit and the right half of the LCD (8 columns/both rows) is illuminated.
  • Page 96: Paper Feeder

    CHAPTER 2 VII. PAPER FEEDER A. Outline The operation sequences of the paper feeder are controlled by the paper feeder driver. A 4-bit microprocessor is used in the paper feeder driver, which controls the sequences of the paper feeder and the serial communication with the engine controller of the printer. The engine controller outputs the pick-up command to the paper feeder driver at the neces- sary timing.
  • Page 97: Pick-up And Feeding

    CHAPTER 2 B. Pick-up and Feeding The paper feeder picks up the paper from the cassette installed in the paper feeder and feeds the paper to the printer. The flow of the paper is as shown below. Figure 2-7-2 The paper size and the presence of the cassette are detected by the three switches (SW801, 802, 803) on the paper feeder driver PCB.
  • Page 98 CHAPTER 2 Engine controller PCB Paper size detection PCB Paper feeder driver PCB Main motor M101 Registration arm Pre-transfer roller CL101 PS102 PS103 Feed rollers SL801 PS801 Paper size detection switches Separation roller SW801 Cassette pick-up rollers SW802 SW803 Cassette feed roller Cassette Figure 2-7-3 PS102: Pre-feed sensor (printer)
  • Page 99 CHAPTER 2 • Paper feeder pick-up timing (Unit: second) INTR STBY PRINT /PRNT signal About 0.7 Main motor (M1) Feed roller clutch (CL101) Scanner motor Pick-up command About 0.15 Pick-up solenoid Pick-up roller Feed roller Separation roller About 0.1 Pre-feed sensor (PS102) Figure 2-7-4 2 - 61...
  • Page 100: Paper Jam Detection

    CHAPTER 2 C. Paper Jam Detection The paper jam detection when the paper is picked up from the paper feeder and fed to the print- er is the same as that of the printer. See page 2-48 for details. 2 - 62...
  • Page 101: Envelope Feeder

    CHAPTER 2 VIII. ENVELOPE FEEDER A. Outline The operation sequences of the envelope feeder are controlled by the envelope feeder driver. A 4-bit microprocessor is used in the envelope feeder driver, which controls the sequences of the envelope feeder and the serial communication with the engine controller of the printer. The engine controller outputs the pick-up command to the paper feeder driver at the neces- sary timing.
  • Page 102: Pick-up And Feeding

    CHAPTER 2 B. Pick-up and Feeding The envelope feeder picks up the envelope from the envelope feeder and feeds it to the printer. The flow of the envelope is as shown below. Figure 2-8-2 The envelope feeder is driven by the main motor (M101) of the printer via the gear. When the /PRNT is sent to the engine controller from the video controller, the printer starts the initial rotation.
  • Page 103 CHAPTER 2 Engine controller PCB Envelope feeder driver PCB Main motor PS902 Registration arm M101 SL901 Pre-transfer roller Torque limiter PS901 PS103 PS102 Figure 2-8-4 PS102: Pre-feed sensor (printer) PS103: Top of page sensor (printer) PS901: Envelope sensor PS902: Envelope multiple feed sensor SL901: Envelope pick-up solenoid 2 - 65...
  • Page 104 CHAPTER 2 The upper separation roller is driven via the torque limiter. Normally, the upper separation roller is imparted with a rotational force in the same direc- tion as that of the pick-up roller and the lower separation roller (white arrow in the top figure in Figure 2-8-5).
  • Page 105: Paper Jam Detection

    CHAPTER 2 C. Paper Jam Detection The paper jam detection when the envelope is picked up from the envelope feeder and fed to the printer is the same as that of the printer. See page 2-48 for details. 2 - 67...
  • Page 106: Duplexing Unit

    CHAPTER 2 IX. DUPLEXING UNIT A. Outline The operation sequences of the duplexing unit are controlled by the duplexing unit driver. A 4- bit microprocessor is used in the duplexing unit driver, which controls the sequences of the duplexing unit and the serial communication with the engine controller of the printer. The duplexing unit driver drives the solenoid, motors, and fan according to the duplexing unit command and the duplexing unit pick-up command sent from the engine controller.
  • Page 107 CHAPTER 2 Duplexing unit driver PCB +24VA J711-3 J704-1 /SEL0 Accepts the command when "L." To printer J712-3 J704-4 SOUT Command input To printer Status output SCLK Serial clock +24VA PS701 J713-3 J706-2 Duplexing PICK SNS unit pick-up "L" when the sensor detects paper. sensor +24VA PS702...
  • Page 108: Reversing And Duplexing Unit Pick-up

    CHAPTER 2 B. Reversing and Duplexing unit Pick-up 1. Outline The paper is led to the duplexing unit by the face-up deflector. This face-up deflector moves in conjunction with the face-up tray, however, it moves by the duplexing unit solenoid (SL701) when the face-up tray is closed.
  • Page 109 CHAPTER 2 Engine controller PCB Duplexing unit driver PCB Main motor M101 Registration arm Pre-transfer roller CL101 PS702 PS102 PS703 PS103 PS501 Feed rollers M701 SL701 PS701 Reversing motor M702 Cassette Duplex feed motor PS102: Pre-feed sensor (printer) PS103: Top of page sensor (printer) PS701: Duplexing unit pick-up sensor PS702: Face-up sensor PS703: Reversed paper sensor...
  • Page 110 CHAPTER 2 2. Reversing When the duplexing unit receives the duplexing unit command from the printer, it turns ON the duplexing unit solenoid (SL701), moves the face-up deflector and feeds the paper to the duplex- ing unit. It also rotates the reversing motor (M701) in the reverse direction (CCW) for about 1 second, and feeds the paper remaining in the reversing unit to the duplexing unit pick-up sen- sor (PS701).
  • Page 111 CHAPTER 2 3. Duplexing unit pick-up When the /PRNT signal is sent to the engine controller from the video controller, the main motor (M1) of the printer starts rotation. When the main motor rotation reaches its prescribed speed, the engine controller turns ON the feed roller clutch (CL101) of the printer and sends the duplex- ing unit pick-up command to the duplexing unit driver.
  • Page 112: Paper Jam Detection

    CHAPTER 2 C. Paper Jam Detection The following paper sensors are installed to detect whether the paper is present or not and whether the paper is fed normally or not. • Reversed paper sensor (PS703) • Duplexing unit pick-up sensor (PS701) The microprocessor (CPU) determines whether paper is jammed or not by checking whether paper is present or absent at the sensors at check timing stored in the memory.
  • Page 113 CHAPTER 3 THE MECHANICAL SYSTEM This chapter describes mechanical operation as well as disassembly and reassembly procedures of the printer. Note the following precautions during disassembly or reassembly. 1. When you remove the EP-52 cartridge, cover the cartridge with a cloth or put it in a dark place to prevent light from affecting the drum inside the cartridge.
  • Page 115: Externals

    CHAPTER 3 I. EXTERNALS 1. Right rear cover 1) Hold the right rear cover and slide it in the direction of the arrow to remove it. A. External Covers Right rear cover Face-up tray Right rear cover Right cover Front cover Figure 3-1-2 Left cover Top cover unit...
  • Page 116 CHAPTER 3 2. Top cover unit 6) Remove the 2 screws. 1) Open the front cover. 7) Unhook the claw on the right front side 2) Remove the right rear cover of the top cover. 3) Open the face-up tray and remove the 2 8) While pressing down the delivery unit, screws.
  • Page 117 CHAPTER 3 3. Left cover 4. Face-up tray 1) Remove the top cover unit. 1) Open the face-up tray. 2) Unhook the 2 claws and remove the left 2) After pulling out the expansion tray, cover. press the shaft on one side of the face- up tray to remove the face-up tray.
  • Page 118 CHAPTER 3 5. Multi-purpose tray 6. Right cover 1) Open the front cover. 1) Remove the right rear cover and top 2) Spread the sides of the front cover cover unit. slightly to the outside and remove the 2) Unhook the claw and remove the right multi-purpose tray from the front cover.
  • Page 119 CHAPTER 3 B. Pick-up Module 7) Disconnect the connector. 1. Removal from the printer 1) Remove the cassette. 2) Remove the right rear cover. 3) Remove the 5 screws. 4) Slide the video controller unit in the direction of the arrow to remove it. Connector Figure 3-1-14 Screws...
  • Page 120 CHAPTER 3 12) Remove the screw and then the engine C. Cooling Fan module. 1. Removal from the printer 1) Remove the top cover unit and the left cover. 2) Disconnect the connector. 3) Unhook the 2 claws and remove the fan filter and cooling fan.
  • Page 121: D. Operation Panel

    CHAPTER 3 D. Operation panel 1. Removal from the printer 1) Remove the top cover unit. 2) Remove the 4 screws, and then the operation panel. Screws Operation panel Figure 3-1-19 3 - 7...
  • Page 122: Drive System

    CHAPTER 3 II. DRIVE SYSTEM 6) Remove the screw and release the ground line from the cable guide. 7) Remove the screw and then the front A. Drive Unit inner cover. 1. Removal from the printer 8) Disconnect all cables from the cable 1) Remove the pick-up module.
  • Page 123: Main Motor

    CHAPTER 3 11) Remove the 8 screws, then take out the B. Main Motor drive unit. 1. Removal from the printer 1) Remove the right rear cover, top cover unit, and right cover. 2) Disconnect the connector. 3) Remove the 4 screws, then take out the main motor.
  • Page 124: Pick-up Drive Unit

    CHAPTER 3 C. Pick-up Drive Unit 2. Disassembly and reassembly 1. Removal from the printer a. Cassette pick-up solenoid 1) Remove the pick-up module according 1) Remove the screw, then take out the to the steps 1) through 12) on page 3-5. cassette pick-up solenoid.
  • Page 125: Paper Transport System

    CHAPTER 3 III. PAPER TRANSPORT B. Cassette Feed Roller SYSTEM 1. Removal from the printer 1) Remove the cassette. 2) Hold the knob on the cassette feed roller A. Cassette Pick-up Roller and pull out the roller. 1. Removal from the printer 1) Remove the cassette.
  • Page 126: Separation Roller

    CHAPTER 3 C. Separation Roller D. Multi-purpose Tray Pick-up Roller 1. Removal from the printer 1. Removal from the printer 1) Remove the cassette. 1) Open the front cover. 2) Open the cover. Hold the knob on the 2) Remove the envelope entrance cover. separation roller and pull out the roller.
  • Page 127: Separation Pad

    CHAPTER 3 E. Separation Pad <Precautions on reassembly> 1. Removal from the printer Be sure that the 3 springs are properly set 1) Open the front cover. when installing the separation pad. 2) Remove the multi-purpose tray. 3) Remove the envelope entrance cover. 4) Remove the multi-purpose tray pick-up roller.
  • Page 128: Multi-purpose Tray Unit

    CHAPTER 3 F. Multi-purpose Tray Unit 6) Open the envelope feeder gear cover. 1. Removal from the printer 7) Remove the 2 screws holding the pick- 1) Remove the top cover unit, right cover, up module and engine module. and left cover. 2) Take out the cassette.
  • Page 129: Registration Unit

    CHAPTER 3 G. Registration Unit 2. Disassembly and reassembly 1. Removal from the printer a. Pre-transfer roller 1) Remove the multi-purpose tray unit 1) Remove the 2 springs, gear, 2 E-rings, according to the steps 1) through 9) on the and 2 bushings, then take out the page 3-14.
  • Page 130 CHAPTER 3 3) Undo the screw, and then remove the 7) Remove the thrust roller, then move the ground plate and the spring. rollers on both sides toward inside. 4) Remove the E-ring and then the bush- 8) Undo the 2 parallel pins, then remove ing.
  • Page 131: Feed Roller Unit

    CHAPTER 3 H. Feed Roller Unit 2. Disassembly and reassembly 1. Removal from the printer a. Feed roller clutch 1) Remove the multi-purpose tray unit 1) Release the E-ring, remove the gear, according to the steps 1) through 9) on then take out the feed roller clutch.
  • Page 132: Feed Guide Unit

    CHAPTER 3 Feed Guide Unit J. Delivery Unit 1. Removal from the printer 1. Removal from the printer 1) Remove the drive unit according to the 1) Remove the top cover unit and left steps 1) through 11) on page 3-8. cover.
  • Page 133: Exposure System

    CHAPTER 3 IV. EXPOSURE SYSTEM 2. Removal from the printer 1) Remove the cartridge. 2) Remove the top cover unit. A. Laser/Scanner Unit 3) Undo the 4 screws, disconnect the 3 1. Configuration connectors, and then take out the The laser/scanner unit scans the laser laser/scanner unit.
  • Page 134: Electrostatic Imaging/developing/cleaning

    CHAPTER 3 V. ELECTROSTATIC IMAGING/DEVELOPING/CLEANING SYSTEM A. EP-52 Cartridge 1. Configuration The EP-52 cartridge consists of a photosensitive drum, a primary charging roller, a developing unit, a cleaning unit, etc. While the photosensitive drum rotates in the cartridge, a visible image is formed on its sur- face based on the print data according to the print process.
  • Page 135: B. Transfer Charging Roller

    CHAPTER 3 2. Photosensitive drum B. Transfer Charging Roller Do not touch the photosensitive drum nor 1. Removal from the printer clean it. 1) Open the top cover. 2) Slightly lift the left shaft of the transfer charging roller with the hook, then lift the right shaft with the hook to remove the transfer charging roller.
  • Page 136 CHAPTER 3 Notes: 1. When cleaning, be careful not to touch the roller or get solvents or oil on it. Clean it with dry lint-free paper (that does not produce paper dust). Do not use water or solvents. 2. Replace the transfer charging roller when you cannot remove the paper dust, toner, etc.
  • Page 137: Fixing System

    CHAPTER 3 VI. FIXING SYSTEM 2. Removal from the printer 1) Turn the power OFF, then unplug the power cord. A. Fixing Unit 2) Remove the face-up tray. 1. Configuration 3) Unhook the claw and then remove the A cross-section of the fixing unit, the appa- right bottom cover.
  • Page 138 CHAPTER 3 Note: Be sure to turn the power OFF and 3. Disassembly and reassembly unplug the power cord before a. Fixing film unit replacing the fixing unit. 1) Disconnect the connector. As the fixing unit is hot, let it stand for a while after turning the power OFF.
  • Page 139 CHAPTER 3 3) Remove the 2 screws. 5) Unhook the claw and remove the cover. Screws Claw Cover Figure 3-6-6 Figure 3-6-8 Note: When unhooking the claws in steps 6) Lift the fixing film unit to remove it. 4) and 5), be aware that the cover jumps up due to the spring force.
  • Page 140 CHAPTER 3 b. Pressure roller 1) Remove the fixing film unit according to the steps 1) through 6) on page 3-24. 2) Lift the pressure roller to remove it. Pressure roller Figure 3-6-10 Note: When lifting the pressure roller, be careful not to deform the leaf spring attached on the side without gear.
  • Page 141: Printed Circuit Boards

    CHAPTER 3 VII. PRINTED CIRCUIT 6) Remove the rod from the engine con- BOARDS troller PCB. 7) Remove the 4 M4 screws and the 3 M3 screws, and pull out the engine con- A. Engine controller PCB troller PCB. 1. Removal from the printer 1) Remove the pick-up module according to the steps 1) through 12) on page 3-5.
  • Page 142 CHAPTER 3 B. Paper Size Detection PCB 5) Disconnect the connector. 1) Remove the pick-up module according 6) Unhook the 2 claws and take out the to the steps 1) through 12) on page 3-5. paper size detection PCB. 2) Disconnect the 2 connectors. 3) Remove the 9 screws and then the cover.
  • Page 143 CHAPTER 3 C. Video Controller PCB keys pressed simultaneously after 1) Remove the right rear cover. replacing the 200V model video 2) Remove the 5 screws and slide the controller PCB. shield case in the direction of the arrow to remove it. Screws Shield case Figure 3-7-7...
  • Page 144 CHAPTER 3 D. Adapter PCB 1) Remove the video controller PCB. 2) Lift the claw and remove the guide. 3) Remove the adapter PCB. Claw Guide Adapter PCB Figure 3-7-9 3 - 30...
  • Page 145: Paper Feeder

    CHAPTER 3 VIII. PAPER FEEDER 2. Removal of the feed roller 1) Remove the cassette. 2) Hold the knob of the cassette feed roller 1. Removal of the pick-up roller and pull out the roller. 1) Remove the cassette. 2) Stand the paper feeder. 3) Hold the knob on the pick-up roller and remove the roller.
  • Page 146 CHAPTER 3 4. Removal of the pick-up drive unit 3) Disconnect the connector of the sole- 1) Remove the 4 screws and then the 2 noid cable. covers. 4) Remove the spring and then the lever. 5) Remove the screw, then take out the pick-up drive unit.
  • Page 147 CHAPTER 3 5. Removal of cassette pick-up sole- 6. Removal of paper feeder driver PCB noid 1) Remove the cover according to the steps 1) Remove the pick-up drive unit. 1) and 2) on page 3-32. 2) Remove the screw, then take out the 2) Disconnect the 3 connectors.
  • Page 148 CHAPTER 3 4) Remove the screw, then take out the paper feeder driver PCB. Screw Paper feeder driver PCB Figure 3-8-10 3 - 34...
  • Page 149: Envelope Feeder

    CHAPTER 3 IX. ENVELOPE FEEDER b. Top cover unit 1) Remove the bottom cover. 2) Undo the snaps on both sides and 1. Removal of external covers remove the weight. a. Bottom cover 3) Unhook the 2 claws and then lift the top 1) Remove the 2 screws, then slide the bot- cover unit to remove it from the frame.
  • Page 150 CHAPTER 3 2. Removal of the envelope feeder dri- 3. Removal of envelope pick-up sole- ver PCB noid 1) Remove the bottom cover and the top 1) Remove the envelope feeder driver PCB. cover unit. 2) Remove the screw and then the cover. 2) Disconnect the 2 connectors.
  • Page 151 CHAPTER 3 4. Removal of the envelope pick-up 4) Remove the E-ring, the bushing, then roller take out the envelope pick-up roller. 1) Remove the envelope feeder driver PCB. 2) Remove the screw and then the cover. E-ring Bushing Screw Cover Envelope pick-up roller Figure 3-9-6...
  • Page 152 CHAPTER 3 5. Removal of the lower separation 4) Unhook the claw, move the separation roller, upper separation roller and roller, and remove the parallel pin. torque limiter Then remove the lower separation 1) Remove the lower cover and top cover roller.
  • Page 153: Duplexing Unit

    CHAPTER 3 X. DUPLEXING UNIT 2. Removal of the left cover 1) Unhook the 3 claws and slide the left cover downward to remove it. 1. Removal of the right cover 1) Unhook the 3 claws and slide the right cover downward to remove it.
  • Page 154 CHAPTER 3 3. Removal of the top cover 4. Removal of the rear cover 1) Remove the right cover and left cover. 1) Remove the right cover and left cover. 2) Unhook the claw and turn the bushing 2) Unhook the 2 claws and remove the in the direction of the arrow to remove delivery guide.
  • Page 155 CHAPTER 3 5. Removal of the exhaust fan (FM701) 3) Disconnect the connector and take out 1) Open the rear cover, remove the screw the exhaust fan from the fan cover. and then the connector cover. <Precautions on reassembly> When installing the fan, be sure that the arrow on the fan cover and that on the fan point the same direction as shown below.
  • Page 156 CHAPTER 3 6. Removal of the duplexing unit driver 3) Disconnect the 6 connectors. 4) Unhook the claw and pull out the 1) Remove the 6 screws and then the duplexing unit driver PCB. upper feed guide. Connectors Screws Upper feed guide Claw Duplexing unit driver PCB Figure 3-10-10...
  • Page 157 CHAPTER 3 7. Removal of the duplexing unit sole- 8. Removal of the duplex feed motor noid 1) Remove the right cover, left cover and 1) Remove the left cover. top cover. 2) Follow the steps 1) and 2) in the duplex- 2) Follow the steps 1) and 2) in the duplex- ing unit driver PCB removal procedures ing unit driver PCB removal procedures...
  • Page 158 CHAPTER 3 5) Undo the 2 E-rings, then remove the 9) Lightly press the both side panels out- swing gear and the gear in the reversing ward to unhook the claws, then remove drive unit. the fan unit. 6) Remove the 3 screws. 10) Remove the lower reversing guide.
  • Page 159 CHAPTER 3 12) Remove the 2 screws, then take out the 9. Removal of the reversing motor duplex feed motor from the inside. 1) Follow the steps 1) through 10) in the duplex feed motor removal procedures to remove the lower reversing guide. 2) Disconnect the connector and then dis- engage the cable from the cable guide.
  • Page 161: Troubleshooting

    CHAPTER 4 TROUBLESHOOTING PREFACE ....... 4-1 VI. MALFUNCTION STATUS IMAGE DEFECTS....4-7 TROUBLESHOOTING ....4-22 III. PAPER JAMS VII. MEASUREMENT AND TROUBLESHOOTING ....4-13 ADJUSTMENT ......4-31 PAPER TRANSPORT VIII. MAINTENANCE AND TROUBLESHOOTING ....4-19 SERVICING......4-41 MALFUNCTION IX. LOCATION OF ELECTRICAL TROUBLESHOOTING ....
  • Page 163: Preface

    CHAPTER 4 I. PREFACE A. Malfunction Diagnosis Flowchart The malfunctions that occur in the printer fall into six main factors; "image defects," "paper jams," "paper transport troubleshooting," "power supply failure," "malfunction troubleshooting," and "malfunction status troubleshooting." If a malfunction occurred in the printer, a service technician is to recognize the causes and to clear the problem according to the troubleshooting procedure for each malfunction.
  • Page 164 CHAPTER 4 Initial check execution Power ON Refer to the item, "malfunction Displays "operator call" Displays "READY"? troubleshooting" or "service call"? Refer to the item, "malfunction Is test print executable? status troubleshooting" (Note 1) Make a test print Refer to the item, "paper jams" Occurs paper jam? Refer to the item, "paper Delivers paper...
  • Page 165 CHAPTER 4 Note : 1. Before executing a test print, make sure to select the same pick-up source and deliv- ery source that were used when the malfunction occurred according to the informa- tion given by the user. If the information is not available, make test prints with all feasible combination of paper source and delivery source in the printer, and find out the factor.
  • Page 166: Initial Check

    CHAPTER 4 B. Initial Check Check the following items before you diagnose malfunction. If any failure is found, the service technician is to clear the problem and to give the instruction to the user. 1. Installation environment Make sure that the requirements stated below meet when installing printer: a.
  • Page 167: C. Test Print

    CHAPTER 4 C. Test Print The test print is divided into two types: engine test print and controller test print. If a malfunction occurs in this printer, make a test print and assess the abnormality of the printer. 1. Engine test print Execution of a test print prints the test print pattern (vertical lines) shown in Figure 4-1-2.
  • Page 168 CHAPTER 4 2. Controller test print The following items can be printed by selecting and executing a TEST MENU: • SHOW PAGE COUNT Displays the total number of pages printed. The total page number is only shown briefly on the display but does not print. The page count prints in the TEST PRINT. •...
  • Page 169 MPTSIZE = A4 PS 1.05 PAGE COUNT = 40 Canon, the Canon logo and LBP are trademarks of Canon Inc. PCL and PCL5 are trademarks of Hewlett-Packard Company. Adobe, PostScript, the Adobe log and the PostScript logo are the trademarks of Adobe Systems Incorporated.
  • Page 170 CHAPTER 4 3. Cleaning Page When the dirty fixing unit is the cause of image defect, the fixing unit can be cleaned by the user. The toner on the upper pressure roller can be removed by printing the cleaning pattern in fig- ure 4-1-4 and re-feeding the paper (cleaning page).
  • Page 171 CHAPTER 4 8) Load the sheet (CLEANING PAGE), the printed side down, in the multi-purpose tray. 9) Press the Go key. 10) Print blank page onto cleaning page at 1200dpi. Note: The paper size requested by 'cleaning page' is page size item value in PCL MENU. 4 - 9...
  • Page 172: Image Defects

    CHAPTER 4 II. IMAGE DEFECTS If the factor of the malfunction is identified as "image defect" by the malfunction diagnosis flow- chart (Figure 4-1-1), find out the defective phenomenon and clear it according to the table shown below. Table 4-2-1 •...
  • Page 173 CHAPTER 4 I-2. Dark <Possible causes> 1. The image density is not adjusted correctly. Action: Adjust the image density by operating the external device. 2. Poor contact between the engine controller PCB drum grounding contact and the cartridge contact Action: Clean the contacts if dirty. If the problem still remains after cleaning, or parts are deformed or damaged, replace them.
  • Page 174 CHAPTER 4 I-5. Dots in vertical line <Possible causes> 1. Dirty static charge eliminator Action: Clean the eliminator with brush. 2. Poor contact between the engine controller PCB static charge eliminator contact and the eliminator Action: Clean the contacts if dirty. If the problem still remains after cleaning, or parts are deformed or damaged, replace them.
  • Page 175 CHAPTER 4 2. Dirty, deformed or worn fixing film unit Action: Replace the fixing film unit. I-9. Dirt <Possible causes> 1. Dirty paper Action: Replace the paper. Advise the customer on how to store paper. 2. Periodic dirt (cassette separation roller, feed roller, pre-transfer roller, fixing film unit, EP-52 cartridge) Action: Identify and clean the dirty part according to Table 4-2-1 on page 4-??.
  • Page 176 CHAPTER 4 Action: Replace the laser/scanner unit. I-12. White horizontal lines <Possible causes> 1. Horizontal scar(s) on the photosensitive drum Action: Replace the cartridge. 2. Defective fixing film unit Action: Replace the fixing film unit. I-13. Poor fixing <Possible causes> 1.
  • Page 177 CHAPTER 4 Table 4-2-1 Periods of appearance of dirt, blank spots on images Phenomenon Diameter Period on Problem location Dirt on back (mm) image (mm) Poor fixing Dirt Blank spots of paper Cassette feed roller About 75 Separation roller About 75 Feed roller 15.8 About 50...
  • Page 178: Paper Jams Troubleshooting

    CHAPTER 4 III. PAPER JAMS TROUBLESHOOTING Paper passes through seven major sections of the printer. Figure 4-3-1 J-1: Envelope feeder pick-up block J-2: Multi-purpose tray pick-up block J-3: Cassette pick-up block J-4: Paper feeder pick-up block J-5: Transfer and feed block J-6: Fixing and delivery block J-7: Duplexing feed block If the factor of the malfunction is identified as "paper jams"...
  • Page 179 CHAPTER 4 J-1. Envelope feeder pick-up block <Possible causes> 1. Warped or twisted envelope Action: Straighten the warped or twisted envelope, and then instruct the user. 2. Defective video controller PCB Action: Make a test print from the envelope feeder. If the envelope is picked up correctly, replace the video controller PCB.
  • Page 180 CHAPTER 4 J-3. Cassette pick-up block <Possible causes> 1. Defective video controller PCB Action: Make a test print from the cassette. If the paper is picked up correctly, replace the video controller PCB. 2. Dirty, worn, or deformed cassette pick-up roller, cassette separation roller, and cassette feed roller Action: Clean the roller(s) if dirty.
  • Page 181 CHAPTER 4 6. Defective paper feeder driver PCB Action: Replace the paper feeder driver PCB. 7. Defective engine controller PCB Action: Replace the engine controller PCB. J-5. Transfer and feed block <Possible causes> 1. Paper is curled downward Action: When a paper 180mm or less in length is jammed before reaching the fixing roller, examine whether the paper is curled downward.
  • Page 182 CHAPTER 4 J-6. Fixing and delivery block <Possible causes> 1. Pressure roller does not rotate smoothly. Action: Check the gears and replace if any worn or fractured gear is found. 2. Fixing unit entrance guide has projections due to dirt, scars or toner. Action: Clean the fixing unit entrance guide.
  • Page 183 CHAPTER 4 2. Paper not suitable for duplex printing was used. Action: Instruct the user to use the paper suitable for duplex printing. 3. Foreign materials or burrs are present on the feed guide. Action: Remove the foreign materials. Replace the guide if it has burrs. 4.
  • Page 184: Paper Transport Troubleshooting

    CHAPTER 4 IV. PAPER TRANSPORT TROUBLESHOOTING If the factor of the malfunction is identified as "paper transport troubleshooting" by the mal- function diagnosis flowchart (Figure 4-1-1), execute the followings and mend the defect. T-1. Multiple feed <Possible causes> 1. If jams occur in the multi-purpose tray, perform step 7 and thereafter. 2.
  • Page 185 CHAPTER 4 7. Paper dust or dirt is accumulated in the feed roller, pre-transfer roller and feed guide. Action: Remove the paper dust or dirt. 8. Paper guide is worn or deformed. Action: Check the paper path, and replace the guide if scarred or deformed. T-3.
  • Page 186: Malfunction Troubleshooting

    CHAPTER 4 V. MALFUNCTION TROUBLESHOOTING If the factor of the malfunction is identified as “malfunction troubleshooting” by the malfunction diagnosis flowchart (Figure 4-1-1), execute the followings and mend the malfunction. E-1. No AC power <Possible causes> 1. Blown fuse (FU1) Action: Replace the fuse (FU1) on the engine controller PCB.
  • Page 187: Malfunction Status Troubleshooting

    CHAPTER 4 VI. MALFUNCTION STATUS TROUBLESHOOTING If the factor of the malfunction is identified as "malfunction status troubleshooting" by the mal- function diagnosis flowchart (Figure 4-1-1), execute the followings and mend the malfunction. M-1. "5F-50 ERROR" (fixing unit malfunction) <Possible causes> 1.
  • Page 188 CHAPTER 4 M-4. "5F-56 ERROR" (Duplexing unit exhaust fan (FM701) malfunction) <Possible causes> 1. Poor contact in the connectors of the FM701 drive signal line Action: Reconnect the intermediate connectors J718 and J719, then the duplexing unit dri- ver PCB connector J707. 2.
  • Page 189 CHAPTER 4 3. Defective envelope feeder driver PCB Action: Replace the envelope feeder driver PCB. 4. Defective engine controller PCB Action: Replace the engine controller PCB. M-8. "5F-62 ERROR” (Feeder Option error) <Possible causes> 1. Defective paper feeder connector Action: Remove the paper feeder and check the connector. If any failure is found, replace 2.
  • Page 190 CHAPTER 4 M-13. "NETWORK OPTION ERROR" <Possible causes> 1. Defective optional network option board Action: Replace the network option board 2. Defective video controller PCB Action: Replace the video controller PCB. M-14. "PS OPTION ERROR" <Possible causes> 1. Defective optional PS ROM DIMM Action: Replace the PS ROM DIMM.
  • Page 191 CHAPTER 4 M-19. "OPTION ROM ERROR" <Possible causes> 1. Defective optional ROM DIMM Action: Replace the ROM DIMM. 2. Defective video controller PCB Action: Replace the video controller PCB. M-20. "TONER CARTRIDGE MISSING" message appears when it is installed <Possible causes> 1.
  • Page 192 CHAPTER 4 2. Defective delivery paper full sensor Action: Replace the sensor. 3. Defective engine controller PCB Action: Replace the engine controller PCB. M-24. "LOAD <SIZE> IN CASSETTE 1" message appears when the specified sized paper is in the cassette <Possible causes>...
  • Page 193 CHAPTER 4 Action: Replace the engine controller PCB. M-27. "LOAD <SIZE> IN ENV." message appears when the specified sized envelope is in the envelope feeder. <Possible causes> 1. Damaged envelope detection lever Action: Replace the lever. 2. Defective envelope feeder driver PCB Action: Replace the envelope feeder driver PCB.
  • Page 194 CHAPTER 4 M-30. "DUPLEX JAM" message appears when the paper jam has not occurred; so, the printer cannot be in READY mode. <Possible causes> 1. Reversing paper sensor lever does not move smoothly, or is damaged. Action: Set the lever to move smoothly. Replace it if damaged. 2.
  • Page 195 CHAPTER 4 This page intentionally left blank 4 - 33...
  • Page 196: Measurement And Adjustment

    CHAPTER 4 VII. MEASUREMENT AND ADJUSTMENT A. Mechanical Adjustment 1. Checking the nip width of the pressure roller The fixing unit is not designed to allow adjustment of the pressure (nip width); however, the incorrect nip width can cause fixing problems. Follow the procedures below to check the nip width: 1) Make an all-black print of A4 size using an EP-52 cartridge, and take the print to the cus- tomer’s site.
  • Page 197 CHAPTER 4 2. Adjusting the installation position of separation guide of envelope feeder (adjustment of gap between separation guide and lower separation roller) Normally, the separation guide and the top cover must be removed as one. However, if only the separation guide has been removed for unavoidable reason, or it needs to be replaced due to deformation, make the adjustment as shown below.
  • Page 198 CHAPTER 4 3. Adjusting the installation position of envelope multiple feed sensor The installation position of envelope multiple feed sensor is normally adjusted at the factory. However, if the screw which hold the sensor is removed or accidentally loosened for replacement of the sensor or its peripheral parts, the installation position of envelope multiple feed sensor must be adjusted correctly.
  • Page 199 CHAPTER 4 This page intentionally left blank 4 - 37...
  • Page 200: Electrical Adjustment

    CHAPTER 4 B. Electrical Adjustment 1. Top margin adjustment As VR501 on the engine controller PCB is adjusted at the factory, its adjustment at the time of installation is not required. However, when the engine controller PCB is replaced in the field, the top margin needs to be re-adjusted.
  • Page 201 CHAPTER 4 VR501 CCW (–) CW (+) TB63 TB62 VR501 SW501 VR601 TB64 TB61 Figure 4-7-5 4 - 39...
  • Page 202: Switches On Pcbs

    CHAPTER 4 C. Variable Resistors, LEDs, Test Pins, Jumpers and Switches on PCBs Only the variable resistors, LEDs, test pins, jumpers, and switches which may require after- sales service are listed below. All other variable resistors, LEDs, test pins, etc. are adjusted only at the factory. These require special tools and measuring instruments and must be set with high precision.
  • Page 203 CHAPTER 4 Table 4-7-1 SW No. Function Power switch SW501 Test print switch VR No. Function VR201 Adjusted at factory VR501 Top of page adjustment VR601 Adjusted at factory 2. Paper Size detection PCB J604 J602 J603 J601 SW600 SW601 SW602 Figure 4-7-7 Table 4-7-2...
  • Page 204 CHAPTER 4 3. Paper Feeder Driver PCB J802 J803 J801 SW801 SW802 SW803 Figure 4-7-8 Table 4-7-3 SW No. Function SW801 Paper feeder paper size detection SW802 switch (see page 2-40) SW803 4 - 42...
  • Page 205: Maintenance And Servicing

    CHAPTER 4 VIII. MAINTENANCE AND SERVICING A. Periodic Replacement Parts • There are no parts which require periodic replacement in this printer. Note: Periodic replacement parts are the parts that must be replaced at regular intervals, even if they are functioning properly and show no signs of wear. (Failure of these parts can seriously affect the performance.) These parts should be replaced during a regular ser- vice visit closest to the end of the parts expected life.
  • Page 206 CHAPTER 4 D. Cleaning Points for Servicing 1. Multi-purpose tray pick-up roller, cassette pick-up roller, separation roller, and feed roller Clean with dry lint-free paper. 2. Separation pad Clean with lint-free paper. 3. Pre-transfer roller/registration arm unit Clean with lint-free paper. 4.
  • Page 207 CHAPTER 4 Figure 4-8-1 1: Face-up deflector 8: Separation pad 2: Fixing unit entrance guide 9: Cassette separation rollers 3: Feed guide 10: Cassette feed rollers 4: Photosensitive drum 11: Cassette pick-up rollers 5: Transfer guide unit 12: Transfer charging roller 6: Pre-transfer roller unit 13: Feed belt 7: Multi-purpose tray pick-up roller...
  • Page 208 CHAPTER 4 E. Standard Tools The standard tools required for servicing the printer are listed below. Table 4-8-2 Tool name Tool No. Remarks Tool case TKN-0001 Jumper wire TKN-0069 With clips Thickness gauge CK-0057 0.02 mm to 0.3 mm Compression spring scale CK-0058 For checking cassette spring strength (0–600 g)
  • Page 209 CHAPTER 4 F. Special Tools In addition to the standard tools, the following special tools are required for servicing the print- Table 4-8-3 Tool name Tool No. Shape RANK Application/remarks Thickness gauge RY9-0123 Used for installing the sepa- ration guide of the optional envelope feeder.
  • Page 210: Set Operation Mode

    Cassette print open SW14 SW13 SW12 Cassette Size Reserved PRINTER DRIVER TESTER Analog Data LED18 Reserved Service Error CANON INC RY9-0124 Operation Error MADE IN JAPAN Sensor Test Option Sensor Sensor/Switch Reset LED17 Communication SW14 SW13 SW12 SW15 Display Select...
  • Page 211 CHAPTER 4 SW10 (Laser ON) Emits laser from the laser diode. SW11 (Enter) Enters the data set by SW3 to SW9. SW12 to SW14 (Display Select) Set display mode. SW15 (Reset) Resets the printer driver tester. 3. Operation a. Connecting to the printer Note: Before handling the printer driver tester, make sure to touch metallic parts of the print- er to discharge electrical static as it may cause malfunctions or failures in the printer...
  • Page 212 CHAPTER 4 b. Setting the printer operations Table 4-8-4 shows printer operations that can be set by combinations of switches on the print- er driver tester. Set the operation mode with SW1 and SW2 and various data with SW3 to SW9 according to the table 4-8-4.
  • Page 213 CHAPTER 4 Table 4-8-4 Test print selection Density selection Operation selection Paper pick-up source SW5 SW4 SW3 SW6 SW5 SW4 SW3 Density Ready inhibit (Note) Cassette Normal — mode Multi-purpose tray Test print Paper feeder Envelope feeder Cassette Scanner motor ON Cassette Cassette Test pattern...
  • Page 214: Duplexing Unit

    CHAPTER 4 c. Monitoring the printer condition Select items to monitor from the table 4-8-5 and 4-8-6. Make settings with SW12 to SW14 and monitor the printer condition with LED1 to LED16. Table 4-8-5 Sensor/switch information Sensor/switch information Jam display (Printer) (Option) SW12...
  • Page 215 CHAPTER 4 Table 4-8-6 Status information 1 Status information 2 Analog data SW12 SW13 SW14 (Note 7) A/D data of VR501 No paper in the specified LED1 Scanner failure bit 0 (LSB) pick-up source A/D data of VR501 LED2 No toner cartridge Main motor failure bit 1 A/D data of VR501...
  • Page 216 CHAPTER 4 3. The cassette is not set in the printer when the paper feeder is selected as the paper pick-up source. 4. The duplexing unit is not connected correctly. 5. The paper feeder is not connected correctly. 6. The envelope feeder is not connected correctly. 7.
  • Page 217: Solvents And Oil List

    CHAPTER 4 H. Solvents and Oil List Table 4-8-7 Components No. Material name Remarks Alcohol: ethyl Cleaning: plastic, • Purchase locally (pure or CHOH rubber, external parts • Flammable: keep away denatured) or from flame isopropyl (pure or denatured) MEK (methyl CO-C Cleaning: oil and toner •...
  • Page 218: Location Of Electrical Parts

    CHAPTER 4 IX. LOCATION OF ELECTRICAL PARTS A. Switches SW101 SW600 SW601 SW602 SW801 SW802 SW803 Figure 4-9-1 4 - 56...
  • Page 219 CHAPTER 4 Table 4-9-1 Symbol Name of Symbol Code Name SW101 Switch Door open detection switch SW600 Paper size detection switch SW601 Paper size detection switch SW602 Paper size detection switch SW801 Paper feeder paper size detection switch SW802 Paper feeder paper size detection switch SW803 Paper feeder paper size detection switch 4 - 57...
  • Page 220: Sensors

    CHAPTER 4 B. Sensors PS104 TH901 PS106 PS501 PS101 PS102 PS103 PS105 PS702 PS703 PS701 Figure 4-9-2 4 - 58...
  • Page 221 CHAPTER 4 PS902 PS801 PS901 Figure 4-9-3 Table 4-9-2 Symbol Name of Symbol Code Name Photointerrupter PS101 Cassette paper sensor PS102 Pre-feed sensor PS103 Top of page sensor PS104 Face-down tray paper full sensor PS105 Multi-purpose tray paper sensor PS106 Fixing unit paper delivery sensor 2 PS501 Fixing unit paper delivery sensor 1...
  • Page 222: Clutches/solenoids

    CHAPTER 4 C. Clutches/Solenoids SL102 CL101 SL101 SL701 Figure 4-9-4 4 - 60...
  • Page 223 CHAPTER 4 SL901 SL801 Figure 4-9-5 Table 4-9-3 Symbol Name of Symbol Code Name Clutch CL101 Feed roller clutch Solenoid SL101 Cassette pick-up solenoid SL102 Multi-purpose tray pick-up solenoid SL701 Duplexing unit solenoid (duplexing unit) SL801 Paper feeder pick-up solenoid (paper feeder) SL901 Envelope pick-up solenoid (envelope feeder) 4 - 61...
  • Page 224: Motors/others

    CHAPTER 4 D. Motors/Others H901 M101 FM101 FM701 M701 M702 Figure 4-9-6 4 - 62...
  • Page 225 CHAPTER 4 Table 4-9-4 Symbol Name of Symbol Code Name Motor M101 Main motor M701 Reversing motor (duplexing unit) M702 Duplex feed motor (duplexing unit) Fan motor FM101 Cooling fan FM701 Duplexing unit exhaust fan (duplexing unit) Fixing heater H901 Fixing heater 4 - 63...
  • Page 226: Pcbs

    CHAPTER 4 E. PCBs Figure 4-9-7 4 - 64...
  • Page 227 CHAPTER 4 Table 4-9-5 Name Function Engine controller PCB Sequence control, high-voltage output, DC output and heater drive Paper size detection PCB Relay between sensors/solenoids and engine controller PCB, and paper size detection Video controller PCB Input/output process between the printer and the external device and management of various data.
  • Page 228: Connectors

    CHAPTER 4 F. Connectors J113 J134 J501 J551 J135 J129 J401 J141F J142F J143F J301 J137 J133 J132 J107 J106 J114 J301 J101 J125 J126 J131 J103 J127 J102 J111 J128 J112 Figure 4-9-8 4 - 66...
  • Page 229 CHAPTER 4 J603 J604 J110 J602 J601 J104 J105 Figure 4-9-9 4 - 67...
  • Page 230 CHAPTER 4 J911 J912 J903 J913 J902 J901 J715 J716 J718 J719 J714 J717 J701 J703 J706 J705 J707 J702 J712 J711 J704 J713 J811 J812 J801 J813 J802 J803 Figure 4-9-10 4 - 68...
  • Page 231 APPENDIX GENERAL TIMING CHART ..A-1 III. LIST OF SIGNALS ....A-5 GENERAL CIRCUIT DIAGRAM A-3 IV. MESSAGE TABLE ....A-11...
  • Page 233: I. General Timing Chart

    GENERAL TIMING CHART • Timing chart for two consecutive prints on A4 paper (Cassette feed ) Power switch ON (Unit: Seconds) Operation WAIT STBY INTR PRINT LSTR STBY /PRNT signal /TOP signal About 0.75 /VDO signal About 0.1 Main motor (M101) About 0.25 About 0.7 Feed roller clutch (CL101)
  • Page 235: Ii. General Circuit Diagram

    II.@æH} GENERAL CIRCUIT DIAGRAM-1/2 J715 J716 Duplexing unit Duplexing unit J717 Duplex feed motor Reversing motor pick-up sensor solenoid PS703 M702 M701 PS701 SL701 Reversed paper sensor J133 TH901 Fixing unit J713 PS702 J134 Toner cartridge Laser/scanner unit Face-up sensor J137 FU901 J714...
  • Page 236 GENERAL CIRCUIT DIAGRAM-2/2 Engine controller To operation panel INTR0* WAIT0* J4/5 3.3V C-14 nCMD 5.0V PSIO1_nIRQ RESET* W/R* C-15 nCCLY nSCEN PSIO1_nWAIT IOWR* IORD* MMD0 nPPRDY C-16 nPCLK nRESET IOCS0* MMD1 MMD2 nRDY C-17 nVDO nCOMWR A7_nWRO N.C. N.C. MMD3 MMD4 nTOP C-18...
  • Page 237: Iii. List Of Signals

    APPENDIX III. LIST OF SIGNALS A. Input/output signals to/from engine controller PCB Connector Abbreviation I/O Logic Signal name AC power input NEUTRAL AC power input THRM Thermistor signal Analog DEL2 DR /DELSNS2 Fixing unit delivery detection signal 2 +3.3V Pulse Beam detection signal (horizontal sync signal) /PPRDY Printer power ready signal /RDY...
  • Page 238 APPENDIX Connector Abbreviation I/O Logic Signal name /DEC Scanner motor deceleration signal +3.3V /BDI BD input signal HALF Laser intensity switching signal /LON Laser forced emission signal /ENBL Video data enable signal /VDO Video signal /FON Fan drive signal FLOCK Fan lock detection signal J55F J55F...
  • Page 239 APPENDIX Connector Abbreviation I/O Logic Signal name SOUT Serial output data Serial input data SCLK Pulse Serial clock signal Upper cassette pick-up solenoid drive signal Pick-up module identification signal 1 Lower cassette pick-up solenoid drive signal PCKCHK Pick-up module identification signal 2 Upper/lower cassette selection signal /1st SNS Cassette paper detection signal...
  • Page 240 APPENDIX B. Input/output signals to/from duplexing unit driver PCB Connector Abbreviation I/O Logic Signal name J701 FMT A Reversing motor drive signal J701 /FMT A Reversing motor drive signal J701 FMT B Reversing motor drive signal J701 /FMT B Reversing motor drive signal J702 IMT A Duplex feed motor drive signal...
  • Page 241 APPENDIX C. Input/output signals to/from paper feeder driver PCB Connector Abbreviation I/O Logic Signal name J801 +24V J801 /SEL1 Paper feeder select signal J801 J801 SOUT Serial input data J801 Serial output data J801 SCLK Pulse Serial clock signal J802 +24V J802 OPT SOL...
  • Page 242 APPENDIX D. Input/output signals to/from envelope feeder driver PCB Connector Abbreviation I/O Logic Signal name J901 +24V J901 /SEL2 Envelope feeder select signal J901 J901 SOUT Serial input data J901 Serial output data J901 SCLK Pulse Serial clock signal J902 +24V J902 ENV SOL...
  • Page 243: Iv. Message Table

    APPENDIX IV. MESSAGES TABLE Action Message Meaning READY The printer is ready to receive data and print. No action required. PAUSED The printer is off-line. Press Go key. RESET TO SAVE RESET verification prompt. Two options are available: This message appears momentarily and then 1.
  • Page 244 APPENDIX Message Meaning Action The printer has received more font and macro ROM or delete Font and macro data than it can hold in the available memory data to create more space. of the Flash ROM. The printer goes off-line when this message is displayed.
  • Page 245 APPENDIX Message Meaning Action ing system. This message is displayed when printer has been turned ON with context sav- ing feature enabled, but due to manual changes to the operation panel, there is not enough memory to support the setup. CONTEXT SAVE The user has pressed Go key to go on-line Press Go key to enable the new...
  • Page 246 APPENDIX Message Meaning Action MEM ALLOC There is not enough memory available to If AUTOCONT is OFF, you must ERROR process the data and print the page. If AUTO- press the Go key to resume print- CONT is ON (CONFIG MENU), the print job ing.
  • Page 247 Prepared by PERIPHERAL PRODUCTS QUALITY ADVANCEMENT DIV. PERIPHERAL PRODUCTS TECHNICAL DOCUMENTATION DEPT. CANON INC Printed in Japan REVISION 0 ( MAY 1998 ) 5-1, Hakusan 7–chome, Toride-City, Ibaraki-Pref. 302-8501, Japan...
  • Page 248 The printing paper contains 70% waste paper. PRINTED IN JAPAN (IMPRIME AU JAPON) 0598 AT 2.50 CANON INC.

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