Canon LBP-860 Service Manual
  1. Manuals
  2. Brands
  3. Canon Manuals
  4. Printer
  5. LBP-860
  6. Service manual
Canon LBP-860 Service Manual

Canon LBP-860 Service Manual

Hide thumbs Also See for LBP-860:
Table of Contents

Advertisement

Quick Links

Download this manual
LBP-860
SERVICE
MANUAL
Canon
Download Service Manual and Resetter Printer at http://printer1.blogspot.com

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the LBP-860 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Canon LBP-860

Summary of Contents for Canon LBP-860

  • Page 1 LBP-860 SERVICE MANUAL Canon Download Service Manual and Resetter Printer at http://printer1.blogspot.com...

  • Page 2: Schedule

    PREFACE This Service contains basic information required for after-sales service of the LBP-860 Manual laser beam printer lhereinafter referred to as the “printer”). This information is vital to the service trchnirian in maintaining the high print quality and performance of the printer.

  • Page 3: Table Of Contents

    CONTENTS CHAPTER 1 GENERAL DESCRIPTION PARTS OF THE PRINTER ..l-8 FEATURES ......l - l OPERATION .

  • Page 4: Chapter 4 Installation

    B. Video Controller PCB..3-19 A. Laser/Scanner Unit ... 3-11 ELECTROSTATIC IMAGING/ C. DC Controller ..... D. Pick-up Motor Driver PCB.. 3-21 DEVELOPING/CLEANING E. Sensor PCB......3-21 SYSTEM ....... . . 3-12 A.
  • Page 5 VII. LOCATION OF ELECTRICAL PARTS/FUNCTION....6-46 TEST PINS, JUMPERS, AND A. Switches ......6-46 SWITCHES ON PC BOARDS..

  • Page 6: General Description

    CHAPTER 1 GENERAL DESCRIPTION PARTS OF THE PRINTER..1-S OPERATION......1-12 SF’ECIFICATIONS ..a....III. ASAFETY INFORMATION..1-7 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 7 This non-impart (low-noise) printer USPS clectrophotographic, electronic, and laser technology 2. High print quality through use of fine toner and high resolution I600 dpil Toner having a particle size half that of conventional Canon loner and higher resolution (600 dpi) produce clearer images.
  • Page 8 CHAPTER 1 A. Construction 600 dots/inch 600 rastc-r lines/inch Roller rharging projection dcvclopmrnt Included in replaceabk EP-E cartridge [The r&ridge ran be used to prin about 6,000 purges of A4/Letler-sxe paper. The average print coverage is 4% m~agc dot ralio with the print density setting in the middle.) Multi-purpose tray feed feed [Two cassetles ran be used Roller transfer...
  • Page 9 CHAPTER 1 B. Performance About 8 pages/min (A4 or Letter) 24 s or less (The amount of time from when the printer rer~wes a /PRNT signal from the video controller when it is ready al an amhienl 75 s or less (loo- or 220-v power source) input.) Plain paper, colurcd paprr.

  • Page 10: Specifications

    D. Video controller Standard: Enhanced PCL (PCL 5e) See table 1-I and 1-2. See figure l-l. KS-232C. asynchronous. 300, 600. 1200. 2400, 4800.9600. 19200. or 38400 baud Data Icngth: 7 or 8 bits Parity: 11 desired Slop bits: Handshaking: XON-XOFF. ETX-ACK, or DTR standard) interface Envelope feeder (Envelope Feeder EF-4) COM- 10.
  • Page 11 CHAPTER 1 Table l-l *Scalable Fonts Pitch Point Stroke Font Symbol Spacing Size Weight Medium Portrait Fixed 1000 Scalable Portrait Bold Upright Courier Proportional Medium Italic Portrait Courier 1004 Portrait Courier Bold Italic Medium Upright CG Times Bold Portrait Proportional Upright CG Times 1007...
  • Page 12 CHAPTER 1 Table l-2 Stroke P i t c h P o i n t S p a r i n g Orientation Weight U p r i g h t L a n d s c a p e Medium 1 6 .
  • Page 13 A. Handling the Laser/Scanner Unit The laser/scanner unit emits invisible possibly damage your eyes. The unit following label is altached to the cover of Figure 1-2 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 14 A. External View 1. Printer I: Upper cover 2: Face-down tray 3: Right rover 4: Control panel 5: Font card slot 6: Power switch 7: Cassette 8: Multi-purpose tray 9: Test print switch 10: Delivery cover 11: Power receptacle 12: Parallel interface connector 13: Serial interface connector Figure l-3 14: Cleaning brush...
  • Page 15 2. Paper feeder 1: Paper feeder 2: Cassette (500 sheets can be placed) Figure 1-6 3. Envelope feeder 1: Envelope side guide 2: Exlension tray 3: Weight Figure l-7 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 16 CHAPTER 1 B. Cross Sectional View 1. Printer 1: Delivery rollers 9: Oblique rollers 2: Lasw/scanner unit 3: EP-E cartridge 11: Developing cylinder 4: Control panel 12: Transfer charging roller 5: Multi-purpose tray 13: Photosensitive drum 6: Cassette 14: Primary charging roller 7: Mulli-purpose tray pick-up roller 15: Upper fixing roller 8: Separation pad...
  • Page 17 CHAPTER 1 3. Envelope feeder Figure 1-9 l-11 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 18 CHAPTER 1 A. The Operator Panel changes your software application cannot control, identify available typefaces, and check the status of the printer. DATA ON LINE FORM FEED MENU ENTER Figure l-10 The operator panel consists of the message/menu display window, eight indicator lights, and 1.
  • Page 19 CHAPTER 2. Indicator Lights The indicator lights provide status information about the printer. The lights have different meanings depending on whether they are on, off, or flashing. Indicator light Mode Description READY The printer is ready to print. An error or attendance message appears in the display. Flashing The printer is receiving data.
  • Page 20 CHAPTER 1 The paper input source indicators are: ENVELOPE FEEDER STANDARD CASSETTE LOWER CASSETTE Figure 1-12 Mode Description The optional Envelope Feeder is the input source. Envelope Flashing The optional Envelope Feeder is selected, but does not Feeder contain envelopes. The multi-purpose tray is the input source.
  • Page 21 3. Operation Keys You USC the operation keys to control the basic functions of the printer. You use the ON LINE key to switch the printer between on-line and off-line. The printer must be on-line to receive information from your computer. To use any of the other keys on the operator panel, the printer must be off-line.
  • Page 22 CHAPTER 1 You use the TEST/FONT key to print the Self Test or the Font List. When lhe printer is off-line, press the TEST/FONT key once to start the Self Test. Press and hold the TEST/FONT key to print the Font List. The Self Test and Font List are described later in this chapter.
  • Page 23 CHAPTER 1 detects a job boundary or you reset the prinler. *** Need to verify all of this *** Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 24 B. Operator Panel Menus You (‘LIT, access the following menus though the operator panel: n PCL PRINT MENU 1. Accessing and Selecting Menu Items Follow these steps to access the menus and make selections: 1. Press ON LINE to se1 the printer off-line. 2.
  • Page 25 CHAPTER1 3. Restoring the Default Settings There are several types of default settings: these settings until you change them. Temporary drfaull settings are those set by your application software for the current print Permanent default setlings are those you set through the operator panel. These selections remain in effect even when you turn off the printer or send a different request through your application.
  • Page 26 Point size is a measure of the vertical height of a character in l/72 of an inch. The LBP-860 adjusts the character’s horizontal spacing according to the point size you select. Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 27 Landscape prints along lhe length of the page You can print in reverse portrait or reverse landscape orientations by making selections through your software application or using printer commands. The LBP-860 has a font rotation feature which makes all fonts available in all orientations. 1 - 21...
  • Page 28 CHAPTER 1 MENU Fart “l-y option default Description Selects the number of lines to print on each page (5 through 128) as LINES well as the amount of space between lines. The FORM menu item places the first line of lext at the top margin, the last line of text at the bottom margin.
  • Page 29 CHAPTER 1 Options D. PCL CONFIG MENU The PCL CONFIG MENU controls certain conflguration settings for your LBP-860. You cannot override or change options in this menu through your software applicalion. you arc using it). MENU option Determines how the printer reacts Lo data and printer errors. You...
  • Page 30 The selections are from 0 NOTE: When you set lhe density to a higher level. LANG ENGLISH The LBP-860 supports the English language. you arc {Ising it). 9600 Determines the rate at which information is transferred between the computer and printer.
  • Page 31 Allows you to choose active high (HI) or active low (LOW) for the POLARITY DTR signal Itne. DATA BITS 8 Determines the data bits used in transmission. Some minicomputer environments only support 7 bit printer data. environments where the eighth bit is not supported. PCL graphics and soft fonts may not function correctly when DATA BITS=7.
  • Page 32 RAM Size: Shows the total amount of installed printer memory, including added optional memory. The LBP-860 comes with 2MB of installed memory. If you install optional memory, you can use a self test to verify it is properly installed.
  • Page 33 CHAPTER F. Printing the PCL Font List Follow these steps to print Ihe Font Lisl: the ON LINE key to set the printer off-line. 2. Press and hold the TEST/FONT key (for approximately five seconds). The printer displays 3. When the Font List is complete. press ON LINE to set the printer on-line. The PCL Font Lisl shows ihe typeface and bitmapped fonts currently available in your printer (both internal and oplional) for PCL print jobs.
  • Page 34 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 35 CHAPTER 1 l - 2 9 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 36 Typeface is the name of the typeface. Pitch/Point indicates the specified pitch or point size of the font. The escape sequence contains a shaded box followed by v or h. This indicates where you must enter the point size (for example. 14.25 v) or the pitch (for example, 12.00 h). Point and Symbol Set in the boxes as required.

  • Page 37: Chapter 2 Operation And Timing

    CHAPTER 2 OPERATION AND TIMING 1. This chapter describes ihe printer functions. the relationships between mechanisms and circuits, and the timing of operations. Mechanical linkages are indicated by black and the ilow of control signals by solid arrows and the flow of white lines groups of signals by outline arrows 2.

  • Page 38: Functions

    Functions Printer functions can be divided into five groups: the system interface, the overall control system. the image-formation system, the laser/scanner unit, and the paper pick-up/feed system. To external device (computer, etc.) - - - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ - - _ r - - - - - SYSTEM INTERFACE controller PCB...

  • Page 39: 2-L B. Outline Of The Electrical V. System

    CHAPTER 2 B. Outline of the Electrical System outputs signals to drive the laser diode, motors. and solenoids in response to print commands and image data from the exlernal device. High-voltage power supply DC controller device Pick-up motor solenoids (Low-voltage power supply) heater Main swtch...

  • Page 40: Dc Controller Input Signals

    CHAPTER 2 C. DC Controller Input Signals DC controller PCB ‘SNS detects paper or when the delivery Pick-up motor dwer PC6 cassette paper ‘2) “Y when detected ‘4) “Y when paper IS detected. OUTPUT SERIAL LINE -A2 ,MP tray INPUT SERIAL LINE 1 paper end sensor MPS ‘3 -84 ‘MPE ‘4...

  • Page 41: Dc Controller Input/Output Signals

    CHAPTER 2 D. DC Controller Input/Output Signals (l/2) DC controller Laser/scanner unit the NDATA signal. The laser switches ON when the /ENBL N DATA ,” signal and this signal are “L”. the laser beam IS input. The analog signal is output to adjust the intensity of the laser beam BD input signal (pulse) Scanner motor reference clock signal...
  • Page 42 DC Controller Input/Output Signals (2/2) “L’ to swtch the fixing roller heater ON. cut power to the fixing roller heater. Output the thermistor voltage value connector PCB I : Fixing roller healer low speed. FLOCK normally. Pick-up motor driver PC6 OUTPUT SERIAL LINE INPUT SERIAL LINE 1 /PA ‘1...

  • Page 43: Basic Sequence Of Operations

    CHAPTER 2 E. Basic Sequence of Operations A4 paper prints on (Cassette feed) Figure 2-6 Table 2-l Remark the fLving roller to During this period, thr roller trmpt~r~tr~re I-pachrs 172°C put the printu in the standby printer checks the car- state and clean the transfer charging roller.

  • Page 44: Outline

    The DC controller controls the APCOU’I signal to set the APCIN signal to the specified value to stabilize the intensity of the laser beam. (Control of laser beam A. Outline intensity: APC control) The modulated laser beam is formed by External device a collimator lens and a cylindrical lens into a parallel beam that strikes the scanning...

  • Page 45: Scanning Exposure

    CHAPTER 2 B. Scanning Exposure across the drum and return to its original The simplest example of exposure of the position, the drum surface ratates about 43 photosensitive drum by the Laser beam is to imagine that both the drum and beam horizontal scans are therefore separated by are stationary.
  • Page 46 CHAPTER 2 signal is called lhe UNBLANKING signal controller. The UBL signal is sent to the laser driver as the FORCIBLE LASER ON signal (/LON) to cause it lo switch the laser diode ON when the /LON signal is ‘T’. Figure Download Service Manual and Resetter Printer at http://printer1.blogspot.com...

  • Page 47: Laser Control Circuit

    Control Circuit C. Laser 1. Outline Laser driver PC6 DC controller Figure 2- 12 The CPU adjusts the value of the This circuil switches the laser diode (LD) APCOUT signal by changing the APCOR ON and OFF at a constant intensity in response lo the /VDO signal from the video signal for coarse adjustment, and the controller.
  • Page 48 CHAPTER 2 output externally) to “H” and sets the 2. Control of laser beam intensity (APC FORCIBLE LASER ON signal (/LON) to control] The CPU performs aulomalic power control The CPU then changes the APCOS diode light. This control can signal (fine adjustment].
  • Page 49 CHAPTER 2 3. laser diode emission control Laser diode emission is controlled by VIDEO signal (/VDOJ, which is sent from the video M S K -Tlr controller and processes the paper size data. The paper size data is input to the CPU from the cassette size sensing switches for cassette feed and by the paper size command from the video controller for...

  • Page 50: Scanner Drive

    CHAPTER 2 speed. D. Scanner Drive The scanner driver drives the scanner 1. Outline motor when it is receiving the SCANNER MOTOR DRIVE signal (/SCNON) from the DC controller. 2. Scanner motor rotation control Figure 2-15 shows the scanner motor control circuit.
  • Page 51 CHAPTER 2 the scanner motor. When the scanner motor turns and reaches the prescribed speed, the CPU sets the SCANNEK MOTOR READY signal The CPU notifies a scanner error to the video controller in the following cases: a. When the /SCNRDY signal does not go motor starting rotation.
  • Page 52 The primary charging roller uniformly applies a negative charge to the surface of the photosensitive drum. To form the latent image on the photosensitive drum, the A. Outline laser beam modulated by the /VDO signal The image formation system is the main illuminates the photosensitive drum part of the printer, and it consists of the surface.
  • Page 53 the primary charging roller prior to generation of a new latent image. The cartridge has a toner sensor that detects whether there is enough toner or whether a cartridge is installed. If the level of toner in the cartridge becomes lower than the prescribed level.

  • Page 54: Printing Process

    CHAPTER 2 B. Printing Process The major part of the image formation system is contained in the cartridge. as shown in Figure 2-17. Laser beam Primary charging roll Transfer charging roller Figure Electrostatic latent image formation The cartridge used by the printer has a stage seamless pholosensitive drum with the Step 1 Primary charge I-)
  • Page 55 CHAPTER 2 The primary charging roller consists of 1. Electrostatic latent image formation stage conductive rubber. In addition to DC bias, This stage has two steps, which together AC bias is applied to the primary charging produce a pattern oi elerlrical charges on roller to keep the potential on the drum the photosensitive drum.
  • Page 56 the laser beam have a higher potential 2. Development stage Development places particles of toner onto (are less negative1 than the negatively the areas of the drum that have been charged toner particles on the developing cleared of cylinder. When these areas approach the charge by the laser beam.
  • Page 57 the charge on the drum to zero. In 3. Transfer stage In the transfer stage. the toner image is this case, the transfer voltage is made transferred from the drum surface to the negative to remove the negatively- paper. charged toner on the transfer charging roller to the drum.
  • Page 58 CHAPTER 2 5. Drum cleaning stage stage In the transfer stage, not all the toner is The toner image transferred to the paper in transferred to the paper. Some remains on t h e t r a n s f e r s t a g e i s h e l d o n l y b y the photosensitive drum.
  • Page 59 Reference: Toner projection development but lo simplify the explanation, the drum potential is shown as positive when it is higher [less than the developing cylinder potential. Description Toner movmmmi and elerlrir potenlials potential between the drum surface and Lhe cylinder is sufficient to overcome Lhe of loner projected depends the DC bias volta@ on...

  • Page 60: High-Voltage Power Supply

    CHAPTER 2 C. High-Voltage Power Supply 1. Outline In response lo an instruction from the microprocessor (MPU) on the DC controller PCF3, the high-voltage power supply applies a voltage comprising the DC voltage and the AC voltage to roller and developing cylinder and applies the positive or negalive DC voltage lo the transfer charging roller.
  • Page 61 CHAPTER 2 paper. When the DEVELOPING BIAS DC ON After completion of printing, a between- signal is sent from the DC controller via page and a negative biases are applied again to clean the transfer charging the serial line, a developing DC bias is roller.
  • Page 62 Note: The transfer high voltage is switched according to the printing sequence, as shown below. the transfer charging roller to clean it.) from the surface of the drum to the paper.) l I[ : Between-page bias Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 63 This page intentionally left blank Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 64 CHAPTER 2 motor is running, the pick-up roller (urns and feeds a sheet of paper into the printer. Outline The paper stops at the resist paper sensor T h e p r e s e n c e o f p a p e r o n t h e m u l t i - purpose tray is sensed by photointerrupter VERTICAL SYNC signal after the paper reaches the sensor, and the leading edge of...

  • Page 65: Paper Size Detection

    The pick-up and delivery units have B. Paper Size Detection Loading the cassette in the printer feeder paper. If the print does not reach or clear actuates specific switches. From the each sensor within a preset time, the combination of actuated switches (Table 2. microprocessor on the DC controller 3).

  • Page 66: Cassette Feed

    C. Cassette Feed Each pick-up roller and the oblique rollers of the pick-up unit are driven by the pick- up motor IM2). When the video controller sends the /PRNT signal to the printer, the pick-up motor starts rotating. After the pick-up motor rotates for 0.1 seconds, the pick-up roller clutch solenoid roller clulch solenoid (SL702) activates for 0.3 seconds to rotate each pick-up roller.

  • Page 67: Fixing And Delivery Unit

    D. Fixing and Delivery Unit SURFACE TEMPERATURE signal (FSRTH) 1. Outline decreases. The upper/lower rollers of the fixing unit According to the voltage of the FSRTH and the delivery rollers are driven by the signal, the microprocessor (CPU) on the DC controller makes lhe FIXING ROLLER by a fixing roller heater (H 1: 500 W.
  • Page 68 2. Fixing unit error detection Table 2-4 The CPU assumes a fixing unit error In the following cases, and informs the video E r r o r m e m o r y c a p a c i t o r (C202) charging detection CPU is 1.62 V or more (C202 is charged) when the power is switched ON...
  • Page 69 3. Fixing roller heater start sequence When the power is switched ON, the CPU The sequence of operations from power-on reads the voltage of pin 74 (ANI6J. If the to standby is as follows: voltage is higher than the specified value, the CPU assumes a fixing unit error before power-ON and cuts the current to the The CPU turns the fixing roller heater...

  • Page 70: Paper Jam Detection

    E Paper Jam Detection To detect the presence of paper and whether or not the paper has been fed correctly, the following paper sensors are provided: . Resist paper sensor IPS602) . Delivery paper sensor (PS201) The microprocessor (CPU) determines if a paper jam has occurred by checking whether paper is present at the sensor within the amount of time specified in the memory.
  • Page 71 CHAPTER 2 3. Delivery unit delay jam The microprocessor detects a delivery unit delay jam if the paper does no1 reach the delivery paper sensor (PS201) within the required time after the VERTICAL SYNC signal [/VSYNC) is STBY PRINT VERTICAL SYNC s,gnal (WSYNC) Jam check p a p e r Figure 2-40...
  • Page 72 CHAPTER 2 standby state. B. Operation When the power is switched ON. the printer enters the WAIT state. When the s i g n a l (/KDYl is sent from the DC controller to notify the video controller that the printer is ready. When the /RDY signal is “L”...
  • Page 73 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 74 CHAPTER 2 b. Banding Coprocessor interface. The banding coprocessor is an Intel 8296 1 KU printer coprocessor that Parallel Port Interface integrates a graphics accelerator and A 256 byte FIFO is used to buffer compression processor necessary for printer data from the Host parallel port. complex page description language parallel port interface.
  • Page 75 Figure 2-45 3. Connectors The following is a summary of the use for The PCMCIA Inlerfare (connector J 120) is supported by dedicated logic. This each connector: Generic Array Logic device (GALS) generates the control signals and Connector Use effects data transfers over the The Engine Interface PCMCIA interface.

  • Page 76: Outline

    CHAPTER 2 b. Displays the printer operating states D. Control Panel with LEDs. Selects the printing environment, This control panel contains 10 LEDs, one VFD (vacuum tluorescent display), operating mode, utility, and paper 7 switches, and one beeper on the source with switches.

  • Page 77: Self-Test

    E. Self-test t h e R E A D Y i n d i c a t o r , ONLINE When the power is switched on, the printer indicator, and the paper pick-up mode executes the self-diagnosis program for the indicator light, and “00 READY AUTO”...

  • Page 78: Status/Error Message

    CHAPTER 2 The following pages show the explanations and corrective actions of status and error messages which are shown in the Status indication display while the printer is operating. Figure 2-47 shows how messages appear on the Slatus indication display. Figure 2-47 If a warning message, operator call, or error occurs.
  • Page 79 operating normally. A status message shows printer operating state when the printer is Status indiration display Description Measure HEADY Ready stale in each operating mode. Thm is the default message. JOB REIJECT The Job in which an error occurred is being skipped.
  • Page 80 2. Warning messages When a warning message is displayed, the operator should take the appropriate action, but does not need to stop the printer operation. Measure TONER LOW The toner level is low. Put print paper in the The upper or lower cassette is empty in automatic paper pick-up mode.
  • Page 81 CHAPTER 2 Description TONER LQW The toner level is low. Take the cartridge out. shake it as instructed in Section II1 of Chapter 4. reinstall it. and print. If this message is dlsplayed again, replace the cartridge, then press the ON LJNE key. Load the cassette contalng LOAD A4 Paper cassette replacement request...
  • Page 82 CHAPTER 2 Upper cassette installation request Load the upper cassette, or NO UPPER CASS. Paper cannot be fed from the lower select another paper cassette because the upper cassette Is not loaded. Operator comment (User-defined operator call) XX.. specified by the Display Comment 1 command.
  • Page 83 4. Error messages If an error occurs and correct printing is not guaranteed, an error message Is displayed. When the ON LINE key is pressed (error skip), printing may be possible in some cases, but correct printing is not guaranteed. To print correctly, take the appropriate action and send the print data again.
  • Page 84 Description Download overflow Take one of the following The pattern data memory overflowed Press the ON LINE key to because there was too much pattern data (downloaded data) for forming receive data from the user-defined characters [character font) external device. The overflow pattern data is sent from the external device to the invalid.
  • Page 85 Description Line error Perform the following LINE EKROR Data from the external devxe was not procedure until the error is received correctly when the serial corrected. interface (RS-232C) was used. Reference When this error occurs. all resume data reception. before the page where the error the interface cable between displayed.
  • Page 86 CHAPTER 2 Status Indication display Description WORK FULL Turn the power OFF and ON again. If the error occurs The specified tranlator cannot find again. advice the customer enough working memory. to add an optional RAM SIMM. Insufficient NVRAM area group on the group setup The specilled translator cannot find menu.
  • Page 87 If this call occurs. turn the power OFF and ON again. If the call occurs again. report the code number, detailed number, and detail of the error occurrence to the service departments of Canon sales companies. a. Printer engine serviceman call...
  • Page 88 CHAPTER 2 b. Controller serviceman call Description Turn the power OFF and ON Internal ROM checksum err”r contents of the ROM on the video again. II” the err”r persists, replace the video controller Internal RAM error Turn the power OFF and ON again.
  • Page 89 Status indiration display Description Turn the power OFF and ON S E R V I C E Extended ROM checksum err”r again. If the error cannot be Font data in the extended ROM SIMM corrected, replace the destroyed. extended ROM SIMM. Turn the power OFF and ON S E R V I C E Extended RAM I error...
  • Page 90 CHAPTER 2 Description R F - 8 0 SEHVlCE Command status timeout Turn the power OFF and ON The DC controller PCB does not send a again. If the error cannot be corrected, replace the video the video controller PCB wlthin controller PCB or DC the presrribed time after the DC controller PCB receives a command.
  • Page 91 CHAPTER 2 Outline The AC line voltage is supplied to the low-voltage power supply circuit in the power supply by turning the power switch (SWIOl) ON. The low-voltage power supply circuit generates +24 VDC and +5 VDC. The +24 VDC is supplied to the main motor.
  • Page 92 receives a 1st Start command from the DC B. Pick-up/Feed System controller, it runs the pick-up motor The envelope feeder pick-up motor (M4) is forward for about 1.8 second, pauses for 0.1 a stepping motor that rotates forward or seconds, then runs the motor backward for backward and is controlled by the envelope about 2.3 seconds.
  • Page 93 CHAPTER 2 When it receives a 2nd Start command, the envelope feeder driver PCB runs the motor backward for about 2.8 seronds to feed the envelope again. Power-ON Figure 2-51 The upper separation roller is driven via a torque limiter by th? motor, which imparts a tur-ning moment in the direclion of Upper separation roller r o t a t i o n o f the p i c k - u p a n d l o w e r...
  • Page 94 C. Paper Jam Detection Paper jam during pickup or leeding from the envelope feeder is detected in the same Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 95 A. Outline of the Electrical System controller controls the paper feeder driver, outputting paper pick-up commands (1st Start and 2nd at the appropriate timing to the peper feeder driver via the serial line. Figure 2- The paper feeder driver drives the solenoid and motor according to these commands. 53 shows the flow of signals between the feeder and the printer.

  • Page 96: Pick-Up/Feed System

    CHAPTER 2 B. Pick-up/Feed System C. Paper Jam Detection The paper feeder pick-up motor [M3) is a Paper jam during pick-up or feeding from stepping motor that rotates foward or the paper feeder is detected in the same backward and is controlled by the paper way as for printer paper jam detection.
  • Page 97 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...

  • Page 98: Paper Transport System

    CHAPTER 3 THE MECHANICAL SYSTEM When you remove the EF-l? cartridge, cover the cartridge with a cloth or put it in a dark place to prevent light from affecting the drum inside the cartridge. Remove the EP-E cartridge from the printer before disassembling or transporting the printer.
  • Page 99 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 100 CHAPTER Right cover Open the printer. the screw. then move the right Remove A. Covers and Panels cover in holding the rear side of the cover, and remove it. S c r e w Front rover Figure 3-1 When cleaning inside the printer, or inspecting or repairing il.
  • Page 101 CHAPTER 3 4) Kelease the hook holding the upper cover with a flat-blade screwdriver and remove the upper cover unit. Figure 3-3 Open the multi-purpose tray. Remove the right cover. and then the upper cover unit. Release the left cover hook holding the left side plate, then open the left cover to the front and remove it.
  • Page 102 CHAPTER 3 Multi-purpose tray 4. Delivery cover Remove the cassette. 1) Kemow Remove the upper cover unit. 2) Open thr deliwry cover. Remove the right cover. and then the 3) Kemovc thr hing? from the I/O panel. left cover. 4) Kernove the delivery rover by pushing Remove the control panel unit.
  • Page 103 Exhaust Fan Exhaust fan remove the front cover. Remove the right cover, and lhen the upper cover unit. Perform step 1 to 5 on page 3-18, and remove the video controller unit. Remove the fan cover hook, and then fan cover. Disconnect the connector and remove the exhaust fan.
  • Page 104 2. Disassembly and reassembly C. Control Panel Unit 1) Remove the two screws, and then the 1. Removing the control panel unit panel. from the printer Remove the urmer cover unit. 2) Kemove the two screws. Figure 3-15 Figure 3-13 3) Release the two hooks holding the control panel unit.
  • Page 105 Main Motor Removing the main motor from the printer A. Drive Unit Remove the right cover. 1. Removing the drive unit from the Perform sieps 1 5 on page 3-18, and printer remove the video controller unit. and 2 on page 3-14. Disconnect the connector.
  • Page 106 CHAPTER 3 8) &move the two screws, disconnect the two connectors, and pull the paper pick-up unit forward and out. Paper Pick-up Unit Removing the paper pick-up unit the cassette. side trl LhP prinler. Figure 3-19 Note: replace the paper pick-up unit.
  • Page 107 b. Regist Paper Sensor and Cassette 3) Remove the pin in the projection on the Paper Sensor left end of the regist sensor holder and push the projection. Then, take off two claws on the right side, and slide off the regisl sensor holder unit lo the left.
  • Page 108 B. Cassette Pick-up Roller C. Multi-purpose Tray Pick-up Roller 1. Removing the cassette pick-up roller 1. Removing the multi-purpose tray the multi-purpose tray. 2) SlantI multi-purpose tray pick-up roller. and pull out thr roller. Figure 3-25 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 109 Separation Pad Paper Delivery Unit Removing the separation pad Removing the paper delivery unit upper cover unit. Remove the left cover. Remove the leaf spring. roller. spring Figure 3-27 Release the two hooks holding the Figure 3-26 delivery unit, and remove the delivery unit by pulling it forward.

  • Page 110: A. Laser/Scanner Unit

    Note: When removing the cable lrom the laser PCB, support the PCB with A. Laser/Scanner Unit your hand. ‘Ihe PCB can be broken 1. Configuration easily it flexed. Remove the four screws and then the laser/scanner unit. Figure 3-31 Figure 3-29 Notes: 1.

  • Page 111: Ep-E Cartridge

    A. EP-E Cartridge 1. Configuration and drum clraning unit in a single housing. During printing the drum rotates and an invisible The EWE carlridgr ~mnot be disasscmblrd. Figure 3-32 a. Protective shield The photosensitive drum is protected by a protective shield that prevents exposure to strong light.

  • Page 112: Transfer Charging Roller

    Cleaning the photosensitive drum Transfer Charging Roller r e m o v e t h e Open the printer. cartridge. Hook the left side of the transfer charging roller shaft with the supplied green cleaning brush. and remove the drum sr~rfacc with it. Notes: 1.

  • Page 113: Fixing Unit

    Removing the fixing roller Open the delivery cover. Remove the two screws, lift the fixing unit slightly. and pull it forward and 1. Configuration out. fixing unit fries the toner image onto the paper. I1 is configured as shown below, Figure 3-35 When you replaced the fixing unit, Note:...
  • Page 114 Remove the two screws. disconnect the 3. Disassembly and reassembly connector, and remove the left futing a. Fixing roller heater the two hooks holding the cover. contact cover. and remove the contact Connector Figure 3-38 Figure 3-36 Remove the screw and then the fixing roller heater lead from the heater wire wire rover to thr lixing unit with a Ilat- Remove the fixing roller heater lead...
  • Page 115 6) Rcmovr the Iwo srrews and then the Thermoswitch Remove the two screws. Release the hook holding the thermoswitch, and remove the Figure 3-41 Note on reassembly: When installing the thermoswitch unit, make sure that the sensing surface of the thermoswitch contacts the surface of the upper fiing roller uniformly.
  • Page 116 5) Remove the screw and then the thermistor. Figure 3-44 Note for reassembly: Figure 3-42 When installing the thermistor, make sure that the sensing surface of the thermistor contacts the surface of the upper fixing 4) Remove the two springs and open the roller uniformly.

  • Page 117: Video Controller Unit

    CHAPTER 3 4) Remove the three screws and then the connecter cover. Controller Unit A. Video 1) Kcmove the right cover. 2) Remove the screw. and “pen the cover. Connector cover Figure 3-47 5) Remove the four screws and then the Figure 3-45 Disconnect lhe connector.

  • Page 118: Video Controller Pcb

    B. Video Controller PCB 5) Disconnect the connector. (If an optional hard disk drive is installed. lwo connectors should be disconnected.) shield case. Then, remove the four screws and video controller PCB. Figure 3-49 3) II’ an expansion ROM PCB is installed. PCB should be rcmovcd Figure 3-50 should be removed.

  • Page 119: Dc Controller Pcb

    DC Controller PCB 4) IWease the two hooks securing the DC controller PCB to the PCB holder, and and rcmovc lhc video controller unit. Figure 3-52 Figure 3-51 Note on reassembly: When installing the DC controller PCB, put the bottom of the PCB into lhe PCB holder, the DC controller PCB.

  • Page 120: Sensor Pcb

    CHAPTER 3 E. Sensor PCB I) Remove the pick-up motor driver PCH by performing steps 1 and 2 on this 2) Disconnect the three ronrvxAors. Figure 3-54 3) Kdease lhe three hooks, and remove Figure 3-53 Figure 3-56 3-21 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...

  • Page 121: Power Supply

    CHAPTER 3 Power Supply Remove the three screws and then the Figure 3-56 Figure 3-57 3) Remove the two screws. disconnect the t w o ronnectors. remcwe the rod, and pull the dower forward and out. Figure 3-58 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...

  • Page 122: High-Voltage Power Supply Pcb

    CHAPTER 3 G. High-voltage Power Supply PCB 2) Stand the prinler on its right side. hooks, a n d remove the high-voltage Figure 3-60 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 123 Figure 3-62 c. Bottom cover Figure 3-6 1 the right cover and lel’t cover. bottom cover. Figure 3-63 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 124 CHAPTER 3 2. Removing the envelope feeder drive 2. Removing the envelope feeder pick- up motor Remove lhe t-t&l, lefl. and bottom rovers. left, and bottom covers. Disconnect Ihe connectors and remove the screw. Screw Figure 3-64 Figure 3-66 pick-up motor. 3) Remove the sensor lever, then remove the envelope feeder driver PCB.
  • Page 125 the lower separation Removing 4. Removing the envelope feeder pick- up roller roller, upper separation roller, and 1) &move the right, 1eA. and bottom covers. torque limiter Remove the right, left, and bottom covers. E-rings Remove the screw holding the ground bushings.
  • Page 126 4) Remove the separation roller shalt from the guide. &move the upper separation Note 3 : W h e n a s s e m b l i n g , c h e c k t h e roller and torque limiter h-cm the shaft. separation roller pressure...
  • Page 127 CHAPTER 3 drive unit. 1) Release the two claws, and remove the Figure 3-76 Figure 3-74 and open the PCB cover. Figure 3-76 3) Disconnect the two connectors and remove the cable tie. Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 128 2. Removing the paper feeder pick-up Removing the paper feeder driver motor 1) Kemove the drive unit. Remove the screw. release the two 2) Remove the four screws, the E-ring, the claws, and open lhe PCB cover. [See gear, and remove the plate. Fig.
  • Page 129 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 130 CHAPTER 4 sure that it works as intended, it must be installed correctly. The service engineer must choose a suitable location, install the printer according to the proper procedures, then fully check the printer before It Is used. The requires a thorough understanding of the printer. STORAGE CHOOSING A LOCATION.
  • Page 131 CHAPTER 4 not install the printer in these places: the sun If the printer must go somewhere sunny, Make sure the requirements below are met the windows must have curtains keep to when installing the printer. The service the sun off. engineer should inspect the place lhe Near magnets or equipment that produces a magnetic field...
  • Page 132 If the boxed prinler is brought into the warm from a cold storeroom or delivery truck, condense- lion will form on the printer surfaces. This will cause various problems, such as print defects. To stop this happening, make sure you leave the printer in its box to gradually warm up to room temperature before unpacking it.
  • Page 133 Cartridge box Lower Styrofoam pad Spacer Protective sheet Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 134 2. Unpacking and installing the cartridge Action Check Remarks Open the small box containing , See F@re 4-4. the cartridge and take the its aluminum bag. Hold the cartridge as shown in See Figure 4-6. Fig. 4-6 and slowly rock it 45” six times, to Slowly insert it until it is securely seated at each...
  • Page 135 CHAPTER 4 3. Operation check Remarks Action Check paper. Plug the power cord in and Check lhat the density of the stitch the printer ON. When the READY indlratnr slops Ilashing, the printrr is standing by: Press printer off lirw. then press the TEST/FONT key to run ofT a test p r i n t .

  • Page 136: Storage Of Sealed Cartridges

    CHAPTER 4 B. Storage of Unsealed Cartridges Each cartridge contains a photosensitive drum coated with an organic photocon- t h a t d e t e r i o r a t e s w h e n A cartridge is affected by its storage exposed to strong light.

  • Page 137: Handling Suggestions

    CHAPTER 4 C. Handling Suggestions 1) Before installing a new cartridge in the printer (or if blank spots appear on prints during use, because of uneven toner distribution) hold the carbidge horimntally and slowly rock it 45” each way about the drum axis.
  • Page 138 6) Do not lurn a cartridge upside down or stand it on end. Always lay it down with its label up. 7) Never take a r&ridge apart Note: If the photosensitive drum gets 1500 lux for about 5 minutes. store 30.000 lux.
  • Page 139 CHAPTER 5 MAINTENANCE AND SERVICING LISTOFTOOLS .....a 5-2 PAPERS REPLACEMENT SCHEDULE ..I..... S-1 LIST OF LUBRICANTS, CLEANERS ..,....,..

  • Page 140: Of Consumables

    CHAPTER The k~llowing is a lable of consumables which, over the warranty period of the printer, are consumables is expressed in terms of the number of prints processed; replace them when they prove to be faulty. Table 5-l As of January 1994 Remarks pick-up Replace the multi-purpose...

  • Page 141: Standard Tools

    CHAPTER 5 A. Standard Tools the printer are listed below standard tools required for servicing Table 5-2 Remarks T o o l N o . Tool name TKN-000 1 With clips. E-Z hook Jumper wire 0.02 mm to 0.3 mm C K - 0 0 5 7 For checking cassette spring C K - 0 0 5 8...

  • Page 142: Special Tools

    CHAPTER 5 B. Special Tools addition lo Ihe standard tools, the following special tools arc required for servicing the printer. Table 5-3 Tool No. Shape Application/remarks RANK Printer driver Used for checking the of the printer or checking a failure of Ihe lam diode.
  • Page 143 CHAPTER 5 Table 5-4 Components Remarks Alcohol: ethyl Cleaning: plastic, Purchase locally (pure or rubber, external parts Flammable: keep away denatured) or from flame isopropyl [pure MEK (methyl Cleaning: oil and Purchase locally toner stains Highly flammable: keep away from flame Apply between gear Tool No.
  • Page 144 CHAPTER 5 Cartridge Tool/solvent Remarks P o i n t Never clean the drum wth solvents. not touch or clean the drum absolutely necessary. Do not expose the drum to light. F i x i n g u n i t Point Remarks Tool/solvent...

  • Page 145: Customer

    CHAPTER 5 The customer should do the following maintenance to maximize printer performance. Table 5-5 Customer maintenance Item Rock the cartridge to redistribute toner. If necessary r&w it. Cartridge When replacing the cartridge. clean the static charge eliminator with the green cleaning brush in the printer. When replacing the rartndge.

  • Page 146: Troubleshooting

    CHAPTER 6 TROUBLESHOOTING INTRODUCTION..,....6- 1 VI. PAPER TRANSPORT EXPLANATION OF SPECIAL TOOL ....I..6-4 VII.
  • Page 147 4. Other points During winter, if the printer is brought into a warm room from a cold one [for instance, A. Initial Check a warehouse), condensation will occur 1. Operating environment inside the printer, causing various Check that: problems. The line voltage does no1 vary more than 10% from the voltage shown on For example: the rating plate.
  • Page 148 CHAPTER 6 Procedure If an image defect or a malfunction occurs. perform the initial check, then follow the basic procedure below. section V on troubleshooting. 2. If an image defect occurs, determine the type of image defect from the list of image defect samples on page 6-14.

  • Page 149: Troubleshooting Tables

    CHAPTER 6 C. How to use the Troubleshooting Tables The lroubleshooting tables in this section have been created from general flowcharts. The way of using hese tables is described below, based on the following examples. Example: No AC Power P o s s i b l e rausc Check Line voltage present at the...
  • Page 150 CHAPTER 6 2. Description of control panel Printer Driver Tester Figure 6-2 TEST PRINT Permits the printer to print the pattern Figure 6-l specified by VIDEO SELECT. 1. Outline VIDEO SELECT The printer driver tester allows lhe printer Selects the test pattern to be printed: to operate without being connected to an black hnage, vertical lines, horizontal lines, interface to determine whether the printer...
  • Page 151 CHAPTER 6 which continues even when the PAPER SIZE [LED) tester is disconnected. Indicates the paper size of the cassette in This mode continues until the the paper pick-up unit specified by the PAPER FEED METHOD SELECT switch. printer is turned OFF. Table 6-l Permits the laser diode to emit light.
  • Page 152 CHAPTER 6 List of signals Table 6-2 No. S i g n a l n a m e Jl-1 line J l - 2 T Serial Serial line (input) J l - 3 J l - 4 G N D Procedure the prinler power switch to OFF.
  • Page 153 CHAPTER 6 B. Mechanical Adjustment 1. Checking the nip width of the lower fixing roller The fiing unit does not allow adjustment A. Image Adjustment of the pressure (nip width). If the nip width If an image problem occurs, follow lhe is set incorrectly, a fixing problem may procedure below to perform a test print.
  • Page 154 2. Installing the separation guide [Adjusting the gap between the separation guide and the lower separation roller) U n d e r n o r m a l c o n d i t i o n s . r e m o v e t h e separation guide along with the upper cover.

  • Page 155: Electrical Adjustment

    C. Electrical Adjustment 1. Leading edge re&tration adjustment adjusted at the factory. Therefore, it does not require adjustment in the field during installation. However, when the DC controller PCB is replaced, the leading edge registration must be readjusted by using the following procedure.
  • Page 156 CHAPTER 6 J211 TB201 Figure 6 - 1 0 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 157 This page intentionally left blank 6-11 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 158 CHAPTER 6 Laser malfunction diagnosis flowchart The laser beam is invisible. When a problem in the laser output occurs, use the laser diagnosis flowchart to determine whether the malfunction was caused with the laser/scanner unit or the DC controller PCB. Notes for the flowchart 1.
  • Page 159 Switch the power ON. When the printer is ready, set the LASER POWER CHECK switch of the driver tester to “ON”. Set the meter range to 20 VDC. Contact the Set the meter range to 20 VDC. Contact the test leads against the following test leads against the following connector pins on the DC controller PCS: connector pins on the DC controller PCB:...

  • Page 160: Examples Of Image Defects

    CHAPTER 6 A. Examples of Image Defects I-1 Light l-2 Dark l-3 Completely l-4 All black blank l-6 Dtrl on back 01 l-7 Vertical black l-8 Irregular and vertically in streaks smudged vertical bands l-9 Irregular and smudged l-10 Blank spots l-11 Solid vertical horizontal bands l-12 Faulty...

  • Page 161: Troubleshooting Image Defects

    B. Troubleshooting Image Defects Does the print quality improve when the image density is adjusted? the EP-E cartridge is replaced? If the toner image is very Open the printer while a print is being YES made. and open the drum protective shield of the EP-E cartridge.
  • Page 162 CHAPTER 6 Possible cause Step Check Result Procedure High-voltage Perform a test print. About ftve seconds YES Check whether the high- after the main motor starts. does the power supply voltage contact is making voltage between 5210-9 (SLQ2) and good contact with the [Developing developing bias contact of PCB become about 0.76 VDC?
  • Page 163 Does the print qualtty improve when Clean the printer drum grounding contact and cartridge contact, then perform one test print. Does the print About one second after the main Check whether the hlgh- motor starts. does the voltage between voltage contact is making good contact with the on the DC controller PCB change from primary charging roller of...
  • Page 164 Completely blank I - 3 Possible cause Step Check Result Procedure DC controller 1 About one second the main Replace the DC controller PCB. motor starts. does the voltage between on the DC controller PCB change from about 5 VDC to 0 V? High-voltage Y E S Check whether the high-...

  • Page 165: Dc Controller Pcb

    I - 4 All black Procedure Possible cause Check EP-E cartridge Does the print quality improve when Replace the cartridge. the cartrld@ is replaced? High-voltage Perform a test print. About one second Replace the high-voltage power supply after the main motor starts. does the power supply PCB.
  • Page 166 CHAPTER 6 I - 5 Large dots vertically in line Possible cause Step Check Procedure the static charge eliminator dirty? Is the static charge eliminator grounded? Transfer roller. If it is not charging roller Possible cause Step Check Result Procedure Is the transfer charging roller dirty7 Clean the roller.
  • Page 167 I - 7 Vertical black streaks Result Procedure Possible Ca”sP step YES Replace the carlridge. Open the upper cover while printing is performed. and open the protective shield of the rartridge. Are vertical Replace the fting unit. black streaks on the drum? I - 8 Irregular and smudged vertical bands Possible cause 1 Step 1...
  • Page 168 Irregular smudged horizontal bands Check Procedure the bands appear at regular Replace the cartrtdge. intervals? Download Service Manual and Resetter Printer at http://printer1.blogspot.com...

  • Page 169: High-Voltage Power

    CHAPTER 6 Blank spots Is the recommended paper being used? Replace the paper. Instruct the customer to wrap and store the paper to prevent it from becomlng damp. Is the transfer charging roller dirty or YES Replace the deformed? E P - E c a r t r i d g e Y E S Does the print quality improve when Replace the cartridge.
  • Page 170 CHAPTER 6 Check Result Procedure Lark of toner Is there one or more straight vertical Take out the cartridge, rock white streaks of uniform width? it as shown in Section III of Chapter 4 to distribute the toner evenly. then put it back.

  • Page 171: Faulty Registration

    CHAPTER 6 Faulty registration Procedure P o s s i b l e cause Steps 1 Check Number of Is the multi-purpose tray or the Advise the user not to load sheets cassette overloaded? the tray or the cassette with excessive amount of paper.
  • Page 172 CHAPTER 6 I- 13 Poor fixing Possible I‘BUSP Sle Check Procedure the transfer charging roller dirty? Clean the roller. If it is not Thermistor Replace the thermistor. Fixing rollers 3 Check whether the upper [upper and band? and lower fixing rollers are Is the lower fming roller dirty’? Clean the roller.
  • Page 173 CHAPTER 6 Distortion I - 15 Missing BD signal Possible cause Step Check Procedure Result Connector Are connertors 5205 and 5206 on the Attach the connectors. DC controller PCB making good contact? Attach the connector. Is conneclor J731 on the BD PCB making good contact? Y E S Replace the laser/scanner...
  • Page 174 W h e n performing any of the corrective actions described below, exercise the following precautions: When measuring voltages at designated connector pins, first check the connector for faulty contacts. Remove the expansion ROM PCB, ROM SIMM, RAM SIMM. and font card from the printer.
  • Page 175 M - 2 No DC Power Check Possible cause Slep Result Procedure the problem improve when the Y E S detection current detection circuit of power switch is turned OFF, then back the power supply activates. AC power Detach connector J 102. Turn the Check by following the steps in M- 1.
  • Page 176 CHAPTER 6 Control panel LEDs do not light. Possible caust- Slep Check Procedure p a n e l Does the problem Improve when you Y E S Replace the control panel. replace Ihe control panel? Video Replace the video controller controller PCH PCB.
  • Page 177 Printer detects a jam and stops even though a paper jam has not M - 7 the printer. Is the REGIST SENSOR paper sensor arm is damaged. If it is replace it; if it is not. replace the Check whether the delivery Is the DELIVERY SENSOR LED of the Y E S Sensor arm...
  • Page 178 CHAPTER 6 M - 8 the selected paper source. Possible cause Check esult Procedure Has the upper cassette been selected? Proceed to step 5 and subsequent steps. Has the multi-purpose tray been Proceed to step 7 and selected? subsequent steps. Has the lower cassette been selected? Proceed to step 9 and subsequent steps.
  • Page 179 CHAPTER 6 has not M - 7 Possible rnusr paper sensor arm is damaged. If it is replace it: if it is not, replace the regist paper sensor. Check whether the delivery paper sensor arm is Delivery damaged. If it is, replace it: paper sensor if It Is not, replace the delivery paper sensor.
  • Page 180 CHAPTER 6 M-9 1 “12 PRINTER OPEN” appears even though the printer is closed. Check Result Procedure Y E S Replace the Upper cover Replace the DC controller c o n t r o l l e r on the pick-up motor driver PCB zero Pick-up motor Replace the pick-up when thr upper cover is closed?
  • Page 181 CHAPTER 6 M- 11 “16 TONER LOW” indicator does not light properly. Possible cause Step Check Result Procedure Shake the cartridge following the The toner is insufficlent. instructions. and load it in to the Prepare a new cartridge. printer. Does the message disappear7 Clean the high-voltage power supply contact.
  • Page 182 Procedure Check P i c k - u p nwtor 2 driver PCB. If the problem paper frrdrr is replaced? DC controller persists after replacing the PCB, replace the DC controller PCB. and prrlbmm a test print by using the printer drivrr tester.
  • Page 183 M- 15 No Paper Pick-up from Upper Cassette Possible cause Step Check Result Procedure Video Place some paper in lhe upper Y E S Replace the video controller controller cassette and perform a test print by PCB. using the printer driver tester. Is the paper picked up from the cassette? Check by following the motor...
  • Page 184 CHAPTER 6 M-16 I No Paper Pick-up from Multi-purpose Tray Check Result Procedure Place some paper on lhe multi-purpose Y E S Replace the video controller PCB. the printer driver tester. Is the paper picked up from the lray? Pick-up Place some paper on the multi-purpose Check by following the steps tray and perform a Lest print by using...

  • Page 185: Pick-Up Motor Driver Pcb

    CHAPTER 6 M-17 1 No Paper Pick-up from Lower Cassette Check Procedure _ _ _ _ _ _ Y E S Replace the video controller Place some paper m the lower cassette Video and perform a test print by using the printer driver tester.

  • Page 186: Laser Malfunction

    CHAPTER 6 M - 19 Poor Output from High-voltage Power Supply Result Procedure Possible cause Step Check Is any terminal of the high-voltage Clean the terminals of the high-voltage contact. Replace the high-voltage high-voltage power supply PCB is power supply PCB. replaced? PCB.
  • Page 187 M - 22 Possible rause Check Procedure Reattach the connectors 10 on the DC PCB and connectors 5741 and 5743 on the connector PCB making good contact? Broken Remove Lhe f&ng unit and measure Check the wiring from thermistor the resistance between connectors connector 5210 on the DC wire controller PCB to the...
  • Page 188 Result ~ Procedure Possible cause Step Check Is connector 5205 on the DC controller PCB making good contact? Power supply 2 Does the voltage between connectors present between connectors the DC controller PCB become about 24 VDC? controller PCB. If it is not, Replace the laser/scanner Laser/scanner 3 between connectors J205-7 (JSCNON)
  • Page 189 CHAPTER 6 A. Print Paper Jams Paper passes through two major sections in the printer: (11 the pick-up section and (2.1 the fixing and delivery section. The following explains how to troubleshoot jams in each of these Figure 6-10 Pick-up section 2: Fixing and delivery section Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 190 CHAPTER 6 Pick-up section C h e c k Is the paper curled or wrinkled? Replace the paper. Advise the customer on how to store the paper. Y E S Does this problnn “CI‘UT with f e e d ? Y E S Does this problem occur when feeding from th? envelope feeder?
  • Page 191 Check Result Procedure Are the proper envelopes being used in Advise the user to only use the envelope feeder ? the recommended I I31 Are there too many envelopes in lhe envelope feeder ? number of envelopes. Envelop? pressure on the envelopes? set the envelope guide too tightly against the Are any rollers worn or deformed?
  • Page 192 CHAPTER 6 B. Incomplete Paper Feed T - l Sheets stuck together Check Result Procedure Step Paper Advise the user to only use Is the recommended paper being used? the recommended -zmer. Separation the surface of the separation pad Cassette T - 2 Wrinkles Possible cause Step...
  • Page 193 Switches Figure 6- 11 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 194 CHAPTER 6 Table 6-5 Function Upper cassette size-sensing switch 1 Upper cassette size-sensing switch 2 Upper cassette size-sensing stitch 3 Lower cassette size-sensing switch 1 (paper feeder) Lower cassette size-sensing switch 2 (paper feeder) Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 195 Solenoids Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 196 Table 6-6 Symbol Symbol Function Delivery paper senscn cassette papa- sensor Multi-purpose tray paper end sensor Paper feeder paper sensor [paper feeder) Envelope feeder paper sensor (envelope feeder] Cassette pick-up roller clutch solenoid Multi-purpose tray pick-up roller clutch solenoid Paper feeder pick-up roller clutch solenotd [paper Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 197 CHAPTER 6 Others C. Motors Figure 6- 6 - 50 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 198 Table 6-7 Function Symbol Symbol Name Drives the photosensltive drum and feed rollers Drives the paper pick-up rollers Drives the paper feeder pick-up rollers (paper feeder) Drives the envelope feeder pick-up rollers Ienvelope feeder) Drives the scanning mirror Fan motor Exhaust fan Heats the upper fixing roller Fixing roller heater...
  • Page 199 D. PC Boards Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 200 CHAPTER 6 Table 6-8 Function Name Controls the pnnting sequence Applies high voltage to the primary and transfer Pick-up motor driver PCL3 Drives the motors and the solenoids Sensor PC0 Relays signals between the sensors. solenoids, motors. and pick-up motor driver PCB Video conlrollrr PC13 Processes I/O between the printer and the external device, and various data.
  • Page 201 E. Connectors Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 202 CHAPTER 6 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...

  • Page 203: Tool

    Variable resistors, LED indicators, test pins. jumpers. and switches that are made use of when servicing are listed below. Any variable resistors, test pins, etc., not listed below are for factory use only: they require special tools and measuring instruments, and must be set with high precision. Do not touch them when servicing.
  • Page 204 CHAPTER 6 B. High-voltage Power Supply PCB TB403 TB404 TB401 TB402 VR40 5401 Table 6- 11 Function For factory use Download Service Manual and Resetter Printer at http://printer1.blogspot.com...

  • Page 205: D. Paper Feeder Driver Pcb

    CHAPTER 6 Motor Driver PCB C. Pick-up Table 6-12 SW602 SW No. SW601 Door sensing stitch SW60 print switch S W 6 0 3 Cassette size sensing switch (See page 2-28 .I 1 II SW603 0 SW604 0 SW605 0 D.
  • Page 206 APPENDIX GENERAL TIMING CHART..A - l SENSOR CIRCUIT....a.. A-11 LIST OF SIGNALS....A-3 GENERAL CIRCUIT....A-6 VIII. ENVEL0PE FEEDER DRIVER.. A- 13 DC CONTROLLER....A-7 IX.
  • Page 207 Timing chart for two consecutive prints on A4 paper (Cassette feed) GENERAL TIMING CHART Power switch ON (Unit: Seconds) STBY Operation STBY PRINT LSTR Exhaust fan (FMI) ( M l ) 7 Main motor 11 Registpapersensor(PS6G2) 12 Delivery paper sensor (PS201) ( A C ) 13 Primary voltage 14 Primary voltage (DC)
  • Page 208 II. LIST OF SIGNALS A. DC controller Abbreviation AUTOMATIC POWER CONTROL INPUT signal (analog) AUTOMATIC POWER CONTROL OUTPUT signal (analog) BEAM DETECTION (Horizontal sync pulse) signal BD 1NPLJT signal COMMAND BUSY signal CONTROLLER CLOCK signal COMMAND signal CONTROLLER POWER READY signal DOOR OPEN DETECT signal VIDEO DATA ENABLE signal FAND...
  • Page 209 APPENDIX Abbreviation VIDEO signal VERTICAL SYNC REQUESI signal VERTICAL SYNC sinnal A - 4 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 210 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 211 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 212 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 213 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 214 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 215 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 216 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 217 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 218 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...
  • Page 219 Download Service Manual and Resetter Printer at http://printer1.blogspot.com...

Table of Contents