PREFACE PREFACE This Service Manual contains basic information required for after-sales service of the laser beam printer LBP-1000 (hereinafter referred to as the "printer"). This information is vital to the ser- vice technician in maintaining the high print quality and performance of the printer. The paper feeder, which is prepared for the printer as option, is also described in this manu- This manual consists of the following chapters: Chapter 1: Product information...
PREFACE 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; final pages were printed on AGFA Selectset avantra 25. All graphics were produced with Macromedia FreeHand (J), and all documents and page layouts were created with QuarkXPress (E).
PREFACE CONTENTS CHAPTER 1 PRODUCT INFORMATION FEATURES........ 1-1 VI. MAINTENANCE AND SPECIFICATIONS ...... 1-3 SERVICING BY THE III. SAFETY INFORMATION..1-6 CUSTOMER ......1-17 IV. PARTS OF THE PRINTER ..1-7 VII. OPERATION ......1-18 INSTALLATION ......1-10 CHAPTER 2 OPERATION AND TIMING BASIC OPERATION ....
PREFACE SWITCHES/SENSORS ....3-16 VII. MOTOR/FAN......3-21 A. Locations......3-16 A. Locations......3-21 B. Multi-purpose Tray Paper B. Main Motor ......3-22 Sensor ......... 3-17 C. Cooling Fan ......3-22 C. Delivery Sensor ....3-17 VIII. PCBS ........3-23 D. Interlock Switch ....3-18 A.
CHAPTER 1 PRODUCT INFORMATION FEATURES........ 1-1 VI. MAINTENANCE AND SPECIFICATIONS ...... 1-3 SERVICING BY THE III. SAFETY INFORMATION..1-6 CUSTOMER ......1-17 IV. PARTS OF THE PRINTER ..1-7 VII. OPERATION ......1-18 INSTALLATION ......1-10...
6. PDL auto-switching This printer supports the Hewlett-Packard's PCL6 printer language. Also, Adobe PostScript 3 can be provided by installing the optional Canon Adobe PostScript 3 Module A-32. This enables PDL auto-switching for PCL and PostScript based on the received data.
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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 10 pages/min. (A4, Letter, B5-JIS) 4) First print time (Note 2) About 16.6 seconds 5) Wait time 10 seconds or less (20°C room temperature) 6) Resolution Horizontal...
CHAPTER 1 12) Maximum power consumption 750W or less (20°C room temperature with the rated voltage input. Including cases exceeding a second at its peak value.) 13) Noise level (Officially announced level based on ISO 9296) Sound power level (1B=10dB) 6.2B or less (printing) 4.0B or less (standby) Sound pressure level...
CHAPTER 1 B. Option 1. Paper feeder 1) Paper Universal (Letter, Legal, Executive, A4, A5, B5-JIS sizes) 2) Capacity 26mm stack (about 250 sheets of 80g/m paper) 3) Dimensions 393 (W) 395 (D) 83.5 (H) mm 4) Weight About 2kg (paper feeder) About 1kg (cassette) 5) Power supply DC24V (supplied from the printer)
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.
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.
CHAPTER 1 Top view 110mm 615mm 300mm 100mm 1500mm Side view <The printer only> 480mm <The printer with the paper feeder> 560mm Figure 1-5-1 1 - 11...
CHAPTER 1 C. Unpacking and Installation Condensation appear on metal surfaces in the printer when brought from a cold area into a warm area. 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 acclimatized to room temperature.
CHAPTER 1 be sure to power OFF both the printer and host computer, and to unplug the power cord from the outlet. If the connector is plugged/unplugged while the printer is ON, it may break the printer down. c. When installing and uninstalling the Adobe PostScript Module A-32, flash ROM, or Expansion RAM DIMM (all of these are options), be sure to switch OFF the printer.
CHAPTER 1 D. Storing, Handling the EP-32 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.
CHAPTER 1 b. 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.
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. 1. Cartridge Rock the cartridge or replace, when necessary. 2. Transfer guide unit When replacing the cartridge, wipe the transfer guide unit with a tightly wrung wet soft cloth, and then with a dry cloth.
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.
CHAPTER 1 Depending on what options you have installed, some items may not appear. • Value key: 5 With an item name displayed, press Value key to step through the item's values. Press Shift and Value keys to step through the values in reverse order. Some items have a large range of num- bers from which to choose a value.
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 1 MENU • PARALLEL 2 MENU • TEST MENU • LANGUAGE MENU •...
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.
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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.
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.
CHAPTER 2 I. BASIC OPERATION A. Functions Printer functions can be divided into five groups: the engine control system, laser/scanner sys- tem, image formation system, paper pick-up/feed system, and video control system. VIDEO CONTROL SYSTEM To external device (host computer, etc.) Video controller PCB ENGINE CONTROL SYSTEM Face-down tray...
CHAPTER 2 B. Basic Operation Sequences The operation sequences of this printer are controlled by the microprocessor (CPU) on the engine controller PCB. The purposes of periods from power ON until the main motor stops after the completion of printing are described below. See the appendix for timing chart. Table 2-1-1 Period Purpose...
CHAPTER 2 C. Power ON Sequence The sequence from power-ON until the printer enters the STANDBY mode is shown below. 1) Power-ON 2) CPU initialization 3) Video interface communication start 4) Fixing heater drive 5) Main motor and fan drive Detects the paper detection status of each sensor in the printer immediately before driving the main motor, and assesses a paper jam if residual paper is detected.
CHAPTER 2 II. ENGINE CONTROL SYSTEM A. Engine Controller PCB 1. Outline The operation sequence of this printer is controlled by the CPU on the engine controller PCB. When the power switch is turned ON and the printer enters the STANDBY mode, the CPU out- puts signals to drive various loads, such as the laser diode, motors, and solenoids, based on the print instruction command and image data input from the engine controller.
CHAPTER 2 2. Functions a. CPU (IC402) The CPU is an 8-bit-single-chip microcomputer IC. This CPU is a single chip CPU with built-in ROM and RAM, and performs the followings according to the control programs stored in the ROM. 1) Printer sequence control 2) Video interface control 3) High-voltage power supply circuit control 4) Laser/scanner control...
CHAPTER 2 3. Engine controller input/output Engine controller PCB +3.3V PS504 J1708-3 J701-1 Multi-purpose "L" when the paper is set on /MPSNS tray paper the multi-purpose tray. sensor +3.3V PS503 J1701-3 J301-3 Delivery "L" when the sensor detects /POSNS sensor the paper.
CHAPTER 2 Engine controller PCB Fixing unit H701 J1132-2 J303-2 Fixing heater Fuse J1132-1 FU1131 +24V J404-1 Multi-purpose SL502 tray pick-up MPSL Sets "L" for a specified period solenoid of time while main motor runs to pick up paper from the Multi- purpose tray.
CHAPTER 2 Engine controller PCB Laser/scanner unit Intermediate PCB +24VA J1001-24 J401-4 Scanner motor J1705-4 J1009-1 drive support SVCHG Scanner motor power control signal circuit Scanner /ACC Scanner motor acceleration signal motor /DEC Scanner motor deceleration signal +3.3V J1706-3 J1009-12 J1001-16 J401-12 BD PCB...
CHAPTER 2 B. Fixing Control Circuit 1. Fixing temperature control The fixing film unit contains a plate-shaped fixing heater to heat the fixing film. The fixing heater temperature is detected by the thermistor (TH701) on the fixing heater. When the surface temperature of the fixing heater rises, the resistance value of TH701 decreas- es, and the voltage of the FIXING HEATER TEMPERATURE DETECTION signal (FSRTH) decreas- The CPU (IC402) on the engine controller controls the FIXING HEATER DRIVE signal (FSRDO) based on the voltage of the FSRTH signal in order to bring the fixing heater temperature to the...
CHAPTER 2 signal detection accuracy. When the fixing heater temperature reaches the point of 5 C lower than the target print tem- perature, the CPU starts the print temperature control. The CPU controls the fixing temperature in the following four modes. 1) Initial temperature control: After a print instruction command is input from the video con- troller, the CPU brings the fixing heater temperature to the point of 5 C lower than the tar- get print temperature.
CHAPTER 2 c. Abnormal warm-up 2 (initial/print temperature control mode) The CPU assesses an abnormal warm-up 2 when the temperature does not exceeds the point of 5 C lower than the target print temperature within 75 seconds after starting the supply of power to the heater.
CHAPTER 2 C. High-voltage Power Supply Circuit 1. Outline Engine controller PCB Primary high-voltage circuit Fixing Comparator Voltage detection J505 circuit circuit Fixing film unit PRDCON DC generation Primary circuit Super- Primary charging roller DCCK impose charging J501 DCPWM Photosensitive drum PRACCK AC generation circuit...
CHAPTER 2 PRDCON) are output, and the primary DC bias is output from the DC generation circuit in the primary high-voltage circuit. The voltage superimposing primary DC bias onto primary AC bias is applied to the primary charging roller. The primary DC bias changes with the developing DC bias according to the IMAGE DENSITY ADJUSTMENT signal (DCPWM) output from the CPU.
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 (SW201) is turned ON. The low-voltage power supply circuit supplies +24VDC and +3.3VDC required for the printer. +24VDC is supplied to the high-voltage power supply circuit and to drive the main motor, scanner motor, fan, etc..
CHAPTER 2 E. Video Interface Control 1. Outline The video controller continually monitors the printer by communicating with the engine con- troller using the video interface. The video controller outputs the video signal through the video interface when the printer is ready to print. The engine controller draw an image on the photosensitive drum by turning the laser ON/OFF based on the video signal output from the video controller, and then transfer the image onto paper to output it.
CHAPTER 2 2. Operation Unlike the conventional video interface, which uses an individual signal line for exchanges of each main signal, the video interface of this printer uses command status. When sending/receiving status and commands, the engine controller and video controller use bi-directional STATUS COMMAND signal (SC) and synchronize data with the SERIAL CLOCK signal (SCLK) output from the video controller.
CHAPTER 2 F. Other Controls 1. Fan motor control This printer has a fan motor as a cooling (air inlet) fan. Figure 2-2-10 shows the fan motor control circuit. Engine controller PCB Intermediate PCB Cooling fan +24VA FANSTOP FAN1001 FANON FANON J401-20 J1001-8...
CHAPTER 2 III. LASER/SCANNER SYSTEM A. Outline Engine Intermediate PCB controller Scanning mirror Scanner motor /ACC Focusing lens /DEC BD mirror Cylindrical lens CNTRL0 CNTRL1 Mirror Laser driver Video controller /VDO Figure 2-3-1 The Engine controller sends the LASER CONTROL signals (CNTRL0, CNTRL1) to the laser driver in the laser/scanner unit.
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. The APC is conducted prior to the image for- mation (Initial APC) and between lines (between line APC).
CHAPTER 2 Unmasking area 1 mm 1 mm Figure 2-3-3 Notes: 1. The shaded area indicates the area where the laser beam can write. 2. T1 is the range 1mm toward the center from the right and left sides of the Letter size regardless of the paper size specification.
CHAPTER 2 C. Scanner System Figure 2-3-4 shows the scanner motor control circuit. Engine controller PCB Intermediate PCB Laser/scanner unit /BDI J401-11 J1001-17 J1003-2 J1706-2 BD PCB +24V +24VS Scanner motor Scanner J401-4 J1001-24 motor J1009-1 J1705-4 Scanner driver IC drive SVCHG J401-1 J1001-27...
CHAPTER 2 quency comparator, and keeps controlling the /ACC signal and /DEC signal so that the scan- ner motor rotation number becomes the specified value. The CPU determines whether the scan- ner motor is rotating at the specified rotation number or not by monitoring the /BDI signal. When stopping the scanner, the SCANNER MOTOR DECELERATION signal (/DEC) is set to “L”...
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, and charging roller, etc.. When a print instruction command is sent from the video controller, the engine controller dri- ves the main motor to rotate the photosensitive drum, primary charging roller, developing cylin- der, and transfer charging roller.
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 uses a seamless drum of a double-layer structure shown in Figure 2-4-3.
CHAPTER 2 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 5. Separation 4. Transfer Registration Multi-purpose tray pick-up Paper delivery 6.
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. The image of negative charges on the drum is invisible to the human eye, so it is called an “electrostatic latent image.”...
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 area struck by the laser beam to be neutralized. These areas on the drum surface form the electrostatic latent image.
CHAPTER 2 As shown in Figure 2-4-8, the developing unit consists of the developing cylinder and rubber blade. The developing cylinder consists of the fixed magnet and cylinder which rotates around the magnet. The single-component toner consists of magnetite and a resin binder, and is held to the cylin- der by magnetic attraction.
CHAPTER 2 A positive charge applied to the back of the paper attracts the negatively charged toner particles to the paper. Roller transfer method is applied to stabilize the paper feed and to reduce ozone generation. Step 5: Separation Photo- sensitive Paper drum...
CHAPTER 2 applied to the back of the paper, they may be dispersed at fixing. This printer applies the negative DC voltage to the fixing film via the pressure roller shaft (pressure roller shaft is a mere continuity path). The negative charge is applied to the paper sur- face by the fixing film.
CHAPTER 2 V. PICK-UP/FEED SYSTEM A. Outline Presence of paper on the multi-purpose tray is detected by the multi-purpose tray paper sensor (PS504). Presence of paper in the cassette is detected by the cassette paper sensor (PS501). When a print instruction command is input to the engine controller from the video controller, the main motor (M1001) and scanner motor start rotating and the fixing heater temperature control starts.
CHAPTER 2 The paper reaches the registration roller after its skew is corrected by hitting the registration shutter. The engine controller sends the /BD signal to the video controller in a specified period of time after the top-of-page sensor (PS502) detects the leading edge of the paper. The /BD signal of this printer functions as both VERTICAL SYNC and HORIZONTAL SYNC signals, and is output to the video controller for a period of time corresponding to the paper length.
CHAPTER 2 B. Fixing and Delivery Unit The pressure roller and delivery roller in the fixing unit are driven by the main motor (M1001). 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.
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. • Top-of-page sensor (PS502) • Delivery sensor (PS503) The CPU determines if a paper jam has occurred by checking for the presence of paper in the sensor at the timing stored in the CPU.
CHAPTER 2 detects the trailing edge of the paper. • Paper 200mm or more: T= about 5 seconds • Paper less than 200mm: T= about 10 seconds c. When a pick-up delay jam occurred When a pick-up delay jam occurred, the printer enters the LAST ROTATION period to deliver the jammed paper.
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.
CHAPTER 2 J4 J5 DRAM DRAM IC10 EEPROM Figure 2-6-1 2 - 39...
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CHAPTER 2 Video Controller PCB Block Diagram for Firm Ware (72pin, 1slot) for Option (72pin, 2slot) for Option (72pin, 2slot) <J8> <J6/7> <J4/5> ROM DIMM ROM DIMM RAM DIMM EDO RAM (4MB) ROM Cont. ROM Cont. ROM Cont. MASK ROM (4MB) MA (10:0), nCAS (3:0), nWE MA (11) nRESET...
CHAPTER 2 B. 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.
CHAPTER 2 C. 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.
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.
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CHAPTER 2 VII. PAPER FEEDER A. Outline The operation sequences of the paper feeder are controlled by the engine controller of the print- er. The engine controller drives the solenoid at the necessary timing via the paper feeder PCB. Presence/absence of the paper is detected by the paper sensor. The flow of input/output signals to/from the paper feeder PCB is as shown below.
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 drive force of the paper feeder is transmitted from the main motor (M1001) in the printer via the gears.
CHAPTER 2 Engine controller PCB Intermediate PCB Paper feeder PCB Face-down Main motor delivery rollers M1001 Registration shutter Photosensitive drum Feed belts Pressure PS502 roller Transfer SL2001 Feed rollers charging roller Registration roller PS2001 Cassette Feed rollers Pick-up roller PS502: top-of-page sensor (Printer) PS2001: Paper feeder paper sensor SL2001: Paper feeder pick-up solenoid Figure 2-7-3...
CHAPTER 2 • Paper feeder pick-up timing (Unit: Second) STBY INTR PRINT Print instruction command Main motor (M1001) 80% of specified rotation number Scanner motor Pick-up solenoid (SL2001) Top-of-page sensor (PS502) Fixing heater Figure 2-7-4 2 - 50...
CHAPTER 3 THE MECHANICAL SYSTEM PREFACE........3-1 VI. SOLENOIDS ......3-19 EXTERNALS ......3-2 VII. MOTOR/FAN......3-21 III. MAIN UNITS ......3-7 VIII. PCBS ........3-23 IV. MAIN PARTS ......3-10 IX. PAPER FEEDER ......3-28 SWITCH/SENSORS ....3-16...
CHAPTER 3 I. PREFACE This chapter describes disassembly and reassembly procedures of the printer. The service technician is to find the cause of the failure according to the "Chapter 4 Troubleshooting" and to follow the disassembly procedures in this chapter to replace the defec- tive part(s).
CHAPTER 3 II. EXTERNALS A. Locations Rear cover Right cover DIMM cover Multi-purpose tray Left cover Top cover unit Operation panel Figure 3-2-1 Follow the procedures below to remove the cover(s) if required when cleaning, inspecting, or repairing inside the printer. The procedures for the covers, which can be removed simply by removing screws without removing other parts, are omitted.
CHAPTER 3 1. Rear cover 2. Top cover unit 1) Remove the cassette. 1) Open the multi-purpose tray. 2) Open the face-up tray to its horizontal 2) Remove the rear cover. position by holding the both sides of the 3) Remove the 2 screws. tray with the both hands.
CHAPTER 3 4) Unhook the claw, and then remove the 3. Right cover arm from the top cover unit. 1) Remove the cassette. 5) Remove the 2 screws, unhook the claw, 2) Open the top cover. and then lift up the top cover unit. 3) Open the multi-purpose tray.
CHAPTER 3 4. Left cover 5. Multi-purpose tray 1) Remove the top cover unit. 1) Open the multi-purpose tray. 2) Unhook the claw, and then lift up the 2) Remove the top cover unit and right left cover in the direction of the arrow to and left covers.
CHAPTER 3 6. Operation panel 1) Remove the top cover unit. 2) Unhook the 2 claws, and then remove the flat cable from the operation panel. Claws Operation panel Figure 3-2-10 <Note for reassembly> When installing the operation panel, be sure to set the flat cable securely.
CHAPTER 3 III. MAIN UNITS B. Drive Unit 1) Remove video controller unit according to the steps 1) through 4) on A. Laser/Scanner Unit page 3-26. 1) Remove the EP-32 cartridge. 2) Disconnect the connector from the 2) Remove the top cover unit. intermediate PCB.
CHAPTER 3 C. Cassette Pick-up Unit D. Registration Roller Unit 1) Remove the drive unit according to the 1) Remove the drive unit according to the steps 1) through 3) on page 3-7. steps 1) through 3) on page 3-7. 2) Remove the spring and gear.
CHAPTER 3 E. Fixing Unit 1) Turn OFF the power switch, and then unplug the power cable. 2) Remove the rear cover. 3) Disconnect the 2 connectors, remove the 4 screws, and then pull out the fix- ing unit toward you. Connectors Screws Fixing unit...
CHAPTER 3 IV. MAIN PARTS A. Locations Multi-purpose tray pick-up roller Separation pad (multi-purpose tray) Cassette pick-up roller Separation pad (cassette) Lower registration roller Registration shutter Transfer charging roller Fixing film unit Pressure roller Figure 3-4-1 3 - 10...
CHAPTER 3 B. Multi-purpose Tray Pick-up Roller C. Separation Pad (multi-purpose tray) 1) Open the multi-purpose tray. 1) Remove the multi-purpose tray. 2) Remove the top cover. 2) Unhook the claw of the right and left 3) Unhook the claw of the right multi-pur- multi-purpose tray pick-up sub rollers, pose tray pick-up sub roller, and then and move the right sub roller to the...
CHAPTER 3 D. Cassette Pick-up Roller E. Separation Pad (Cassette) 1) Remove the cassette. 1) Remove the cassette. 2) Place the printer on its back. 2) Press the lifting plate, and then lock it. 3) Unhook the claw of the left bushing, 3) Unhook the 4 claws of the separation rotate the bushing, and then pull it out.
CHAPTER 3 F. Lower Registration Roller G. Registration Shutter 1) Remove the registration roller unit 1) Remove the registration roller unit according to the steps 1) through 3) on according to the steps 1) through 3) on page 3-8. page 3-8. 2) Remove the 3 springs, and then sepa- 2) Separate the upper registration roller rate the upper registration roller unit...
CHAPTER 3 H. Transfer Charging Roller Fixing Film Unit 1) Open the top cover. 1) Remove the fixing unit according to the 2) Unhook the claw of the left bushing of steps 1) through 3) on page 3-9. the transfer charging roller. Lifting the 2) Disconnect the connector from the roller slightly, remove the right side of delivery sensor.
CHAPTER 3 6) Lift up the fixing film unit to remove. J. Pressure Roller 1) Remove the fixing unit according to the steps 1) through 3) on page 3-9. 2) Remove the fixing film unit. 3) Remove the gear. 4) Remove the screw holding the fixing entrance guide.
CHAPTER 3 B. Multi-purpose Tray Paper Sensor C. Delivery Sensor 1) Remove the drive unit according to the 1) Remove the fixing unit according to the steps 1) through 3) on page 3-7. steps 1) through 3) on page 3-9. 2) Unhook the 2 claws, and then remove 2) Disconnect the connector, unhook the 2 the multi-purpose tray paper sensor...
CHAPTER 3 D. Interlock Switch E. Top-of-Page Sensor/Cassette Paper 1) Remove the drive unit according to the Sensor/Test Print Switch steps 1) through 3) on page 3-7. 1) Remove the engine controller PCB 2) Disconnect the connector, and then according to the steps 1) through 7) on remove the interlock switch.
CHAPTER 3 B. Multi-purpose Tray Pick-up Solenoid C. Cassette Pick-up Solenoid 1) Remove the drive unit according to the 1) Remove the drive unit according to the steps 1) through 3) on page 3-7. steps 1) through 3) on page 3-7. 2) Rotate the engine controller PCB 2) Rotate the engine controller PCB according to the steps 3) through 5) on...
CHAPTER 3 B. Main Motor C. Cooling Fan 1) Remove the drive unit according to the 1) Remove the top cover unit and left steps 1) through 3) on page 3-7. cover. 2) Remove the 4 screws and then the main 2) Disconnect the connector.
CHAPTER 3 B. Engine Controller PCB 5) Remove the 4 screws, lift the power 1) Remove the cassette. switch side, and then rotate the engine 2) Remove the rear cover. controller PCB. 3) Disconnect the 2 connectors and remove the 2 screws from the back of the printer.
CHAPTER 3 cially flat cable) securely. C. Intermediate PCB 1) Remove the drive unit according to the < Check after reassembly > steps 1) through 3) on page 3-7. After reassembly, make a test print to con- 2) Disconnect the 3 connectors. firm that there is no image defects (white vertical lines) on the printed image.
CHAPTER 3 D. Video Controller PCB 5) Remove the 4 screws, and then the 1) Remove the options such as RAM, video controller unit mounting plate. DIMM, or ROM, if installed. 2) Remove the top cover unit and right cover. 3) Remove the 3 screws, and then the memory cover.
CHAPTER 3 E. Connector 1 PCB/Connector 2 PCB 1) Remove the video controller PCB according to the video controller PCB removal steps. 2) Remove the 3 screws, and then the con- nector 1 PCB. 3) Remove the 2 screws, and then the con- nector 2 PCB.
CHAPTER 3 B. Disassembly and Reassembly 4) Unhook the claw of the left bushing, 1. Removal of the pick-up roller and then rotate the bushing to remove. 1) Remove the cassette. 5) Unhook the claw of the right bushing, 2) Place the paper feeder upside down. and then rotate the bushing to remove.
CHAPTER 3 2. Removal of the separation pad 3. Removal of the pick-up drive unit 1) Remove the cassette. 1) Remove the pick-up roller according to 2) Lock the lifting plate by pushing it the steps 1) through 5) on page 3-29. down.
CHAPTER 3 4) Remove the 4 screws and then the pick- 4. Removal of pick-up solenoid up drive unit. 1) Remove the pick-up drive unit. 2) Remove the screw, and then the pick- up solenoid. Screws Pick-up drive unit Figure 3-9-7 3 - 31...
CHAPTER 3 5. Removal of the paper sensor 6. Removal of the paper feeder PCB 1) Remove the cassette. 1) Remove the cassette. 2) Place the paper feeder upside down. 2) Place the paper feeder upside down. 3) Unhook the claw, and then remove the 3) Unhook the 4 claws, and then remove cover.
CHAPTER 4 TROUBLESHOOTING PREFACE........4-1 VI. MALFUNCTION STATUS IMAGE DEFECTS ...... 4-6 TROUBLESHOOTING....4-21 III. PAPER JAMS VII. MEASUREMENT AND TROUBLESHOOTING....4-14 ADJUSTMENT......4-27 IV. PAPER TRANSPORT VIII. MAINTENANCE AND TROUBLESHOOTING....4-19 SERVICING ....... 4-31 MALFUNCTION IX. LOCATION OF CONNECTORS..4-37 TROUBLESHOOTING....
CHAPTER 4 I. PREFACE A. Malfunction Diagnosis Flowchart The malfunctions that occur in the printer fall into five main factors; “image defects,” “paper jams,” “paper transport troubleshooting,” “malfunction troubleshooting,” and “malfunction sta- tus troubleshooting.” If a malfunction occurred in the printer, the service technician is to find the factor according to the malfunction diagnosis flowchart and to clear the problem following the action procedure for each malfunction.
CHAPTER 4 Initial check execution Power ON Operator call or Refer to the item, "malfunction Displays "READY"? service call on the video troubleshooting" interface? Refer to the item, "malfunction Is test print executable? status troubleshooting" (Note 1) Make a test print Occurs paper jam? Refer to the item, "paper jams"...
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.
CHAPTER 4 B. Initial Check Check the following items before making a diagnosis of 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.
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 pattern (horizontal lines) shown in the figure below.
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 shown briefly on the display but is not printed. The page count prints in the TEST PRINT. •...
CASSETTE1 SIZE = A4 CLEANING PAGE CASSETTE2 SIZE = A4 Canon, the Canon logo and LBP are trademarks of Canon Inc. Canon, the Canon logo and LBP are trademarks of Canon Inc. PCL and PCL5 are trademarks of Hewlett-Packard Company.
CHAPTER 4 II. IMAGE DEFECTS If the factor of the malfunction is identified as “image defects” by the malfunction diagnosis flow- chart (Figure 4-1-1), find out the cause of the failure according to the table below and clear the problem. Table 4-2-1 •...
CHAPTER 4 II-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 in the drum grounding contact pin of the drive unit and in the cartridge con- tact.
CHAPTER 4 Action: Replace the cartridge. 3. Defective engine controller PCB. Action: Replace the engine controller PCB. II-5. Dots in vertical line <Possible causes> 1. Dirty static charge eliminator Action: Clean the eliminator with brush. 2. Poor contact in the static charge eliminator contact on the engine controller PCB and in the static charge eliminator contact.
CHAPTER 4 II-8. Black horizontal lines <Possible causes> 1. Horizontal scar(s) on photosensitive drum Action: Replace the cartridge. 2. Dirty, deformed or worn fixing film unit Action: Replace the fixing film unit. II-9. Dirt <Possible causes> 1. Dirty paper Action: Replace the paper with new one. Advise the customer on how to store paper. 2.
CHAPTER 4 Action: Remove the foreign materials. 5. Dirt or foreign materials on the fixing unit entrance guide. Action: Clean the fixing unit entrance guide. 6. Scars or foreign materials on the fixing film unit surface Action: Replace the fixing film unit. 7.
CHAPTER 4 5. Defective engine controller PCB Action: Replace the engine controller PCB. 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 Feed roller 13.3...
CHAPTER 4 III. PAPER JAMS TROUBLESHOOTING Paper passes through five major sections of the printer. Figure 4-3-1 III-1: Multi-purpose tray pick-up block III-2: Cassette pick-up block III-3: Paper feeder pick-up block III-4: Transfer and feed block III-5: Fixing and delivery block If the factor of the malfunction is identified as “paper jams”...
CHAPTER 4 III-1. Multi-purpose tray pick-up block <Possible causes> 1. Defective video controller PCB Action: Make an engine test print from the Multi-purpose tray. If the printer feeds the paper normally, replace the video controller PCB. 2. Curled paper Action: Straighten the paper, and then instruct the user. 3.
CHAPTER 4 gear(s). 4. Defective cassette pick-up solenoid Action: Disconnect the cassette pick-up solenoid connector J405 from the engine controller PCB. Measure the resistance between the cable side connector J405-1 and 405-2. If it is not about 95 , replace the cassette pick-up solenoid. 5.
CHAPTER 4 Action: Replace the engine controller PCB III-4. Transfer and feed block <Possible causes> 1. Dirty, worn or deformed registration roller Action: Clean the registration roller if dirty. Replace it if worn or deformed. 2. Dirty or worn registration shutter Action: Clean the registration shutter if dirty.
CHAPTER 4 Action: Adjust the lever so that it moves smoothly. Replace it if damaged. 7. Worn fixing unit delivery roller Action: Replace the fixing unit delivery roller. 8. Fixing unit delivery roller does not rotate smoothly. Action: Check the gears, and replace any worn or fractured gear(s). 9.
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. IV-1. Multiple feed <Possible causes> 1. Worn separation pad surface Action: Replace the separation pad.
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. V-1. No AC power <Possible causes> 1. Blown fuse (FU201) Action: Replace the fuse on the engine controller PCB.
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. VI-1. “5F-50 ERROR” (Fixing unit failure) <Possible causes> 1.
CHAPTER 4 the intermediate PCB connector J1005-1 (/FANON) and J1005-3 (GND) immediate- ly after power-ON. Replace the cooling fan, if the voltage changes from 0V to about 24V. 3. Poor contact in intermediate PCB connector Action: Reconnect the intermediate connector J1001 and the engine controller PCB con- nector J401 correctly.
CHAPTER 4 Action: Replace the video controller PCB. VI-9. “OPTION RAM ERROR” <Possible causes> 1. Defective optional RAM DIMM Action: Replace the RAM DIMM. 2. Defective video controller PCB Action: Replace the video controller PCB. VI-10. “OPTION ROM ERROR” <Possible causes> 1.
CHAPTER 4 VI-13. Printer does not enter READY state because “jam status” is output when paper is not jammed. <Possible causes> 1. Top-of-page sensor lever does not move smoothly, or is damaged. Action: Adjust the lever so that it moves smoothly. Replace it if damaged. 2.
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-32 cartridge, and take the print to the cus- tomer’s site.
CHAPTER 4 C. Variable Resistors, LEDs, Test Pins, Jumpers and Switches on PCBs Only the variable resistors, LEDs, test pins, jumpers, and switches required for after-sales ser- vice in the field are listed below. All other variable resistors, test pins, etc. are for the factory use only. The adjustment and check using these test pins, etc.
CHAPTER 4 Figure 4-7-1 SW No. Function SW201 Power switch SW701 Test print switch VR No. Function VR601 For factory use only 4 - 29...
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CHAPTER 4 VIII. MAINTENANCE AND SERVICING A. Periodic Replacement Parts • No parts 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 service visit closest to the end of the parts expected life.
CHAPTER 4 D. Cleaning during a Service Visit Following the procedures below, clean the printer during service visit. 1. Transfer charging roller As a general rule, the transfer charging roller is not to be touched or cleaned. If it is unavoid- able, clean the roller with dry lint free paper (which produces little paper dust).
CHAPTER 4 Figure 4-8-1 1: Feed guide 6: Multi-purpose tray pick-up roller 2: Feed belt 7: Separation pad 3: Transfer charging roller 8: Cassette pick-up roller 4: Transfer guide unit 9: Static charge eliminator 5: Registration shutter 10: Fixing unit entrance guide 4 - 33...
CHAPTER 4 E. Standard Tools The standard tools required for servicing the printer are listed below. Table 4-8-1 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)
CHAPTER 4 G. Solvents and Oil List Table 4-8-2 Components No. Material name Remarks Alcohol: ethyl Cleaning: plastic, • Purchase locally (pure or CHOH rubber • Flammable: keep away denatured) or from flame isopropyl (pure or denatured) MEK (methyl CO-C Cleaning: oil and toner •...
APPENDIX GENERAL TIMING CHART ..A-1 III. LIST OF SIGNALS ..... A-5 GENERAL CIRCUIT DIAGRAM ... A-3 IV. MESSAGES TABLE ....A-11...
APPENDIX I. GENERAL TIMING CHART • Timing chart for two consecutive prints on A4 paper (Unit: Seconds) Operation WAIT STBY INTR PRINT LSTR STBY Print start command 0.06 /VDO and VDO signals 1.86 Main motor (M1001) Note Full speed rotation Note Cooling fan (FAN1001) 80% of normal scanner speed...
APPENDEX III. LIST OF SIGNALS A. Input/output signals to/from engine controller PCB Connector Abbreviation I/O Logic Signal name INL201 AC power input INL201 INL201 AC power input J301 FSRTH Thermistor signal Analog J301 J301 PO-DR J301 J301 /POSNS Delivery detection signal J303 J303 J401...
APPENDEX Connector Abbreviation I/O Logic Signal name J403 J403 +3.3V J404 +24V J404 MPSL Multi-purpose tray pick-up solenoid drive signal J405 +24V J405 CSTSL Cassette pick-up solenoid drive signal J701 MP_DR J701 J701 /MPSNS Multi-purpose tray paper detection signal A - 6...
APPENDEX B. Input/output signals to/from intermediate PCB Connector Abbreviation I/O Logic Signal name J1001 +24VR J1001 J1001 J1001 +24V J1001 +24V J1001 /MON Main motor drive signal J1001 J1001 FANON Fan drive signal J1001 FLOCK Fan lock detection signal J1001 J1001 Status/command signal J1001...
APPENDEX Connector Abbreviation I/O Logic Signal name J1009 +24V J1009 /ACC Scanner motor acceleration signal J1009 /DEC Scanner motor deceleration signal J1009 J1009 J1009 J1009 VDATA Video signal J1009 /VDATA Video signal J1009 J1009 CNTRL1 Laser control signal 1 J1009 CNTRL0 Laser control signal 0 J1009...
APPENDEX C. Input/output signals to/from paper feeder driver PCB Connector Abbreviation I/O Logic Signal name J2001 +24V J2001 J2001 J2001 /FDSNS Paper feeder paper detection signal J2001 J2001 FDSN Paper feeder pick-up solenoid drive signal J2002 +24V J2002 /FDSN Paper feeder pick-up solenoid drive signal J2003 FD_DR J2003...
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APPENDEX IV. MESSAGES TABLE Message Meaning Action READY The printer is ready to receive data and No action required. print. 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.
APPENDEX Message Meaning Action FLASH ERROR An error has occurred when trying to format, Replace the Flash ROM. or read or write data to the optional Flash ROM. FLASH FORMAT The optional Flash ROM has been formatted No action required. RESTART using the FORMAT FLASH item.
APPENDEX Message Meaning Action 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 CHANGE after adjusting the context saving feature. setting and resume operation. The printer is allocating enough memory for the context saving feature.
APPENDEX Message Meaning Action PAGES: #### MENU, where #### is the total number of No action required. pages. PAPER JAM A paper jam has occurred in the printer. Remove the jammed paper. The top cover must be opened and closed to resume printing. WRONG PAPER A paper size mismatch has occurred.