Canon BJC 50 - Color Inkjet Printer Service Manual
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Canon BJC 50 - Color Inkjet Printer Service Manual

Canon BJC 50 - Color Inkjet Printer Service Manual

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REVISION 0
QY8-1358-000
APR. 1998
COPYRIGHT
1998 CANON INC. CANON BJC-50 0498 AB 2.00-0 PRINTED IN JAPAN (IMPRIME AU JAPON)

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Summary of Contents for Canon BJC 50 - Color Inkjet Printer

  • Page 1 REVISION 0 QY8-1358-000 APR. 1998 COPYRIGHT 1998 CANON INC. CANON BJC-50 0498 AB 2.00-0 PRINTED IN JAPAN (IMPRIME AU JAPON)
  • Page 2 0498 AB 2.00-0...
  • Page 4 This manual may include technical inaccuracies or typographical errors due to improvements or changes in the products. When amendments are made to the content of this manual, Canon will issue technical information as the need arises. In the event of major alterations to the content of this manual over a long or short period, Canon will publish a revised version of the manual.
  • Page 5 I. ABOUT THIS MANUAL This manual is divided into five parts containing the information required for servicing the BJC- 50 printer. Part 1: Safety and Precautions This part contains information on how to service the unit safely. It is very important, and must be read.

  • Page 6: Table Of Contents

    II. TABLE OF CONTENTS Part 1: SAFETY AND PRECAUTIONS Page 1 - 1 1. PERSONAL SAFETY PRECAUTIONS 1 - 1 1.1 Moving Section of the Printer 1 - 2 1.2 Ink Stains 1 - 2 1.2.1 Ink path 1 - 3 1.2.2 Ink mist 1 - 4 1.3 BJ Cartridge Aluminum Plate...
  • Page 7 4 -11 2.1.3 ECP mode 4 -12 2.1.4 IrDA 4 -15 2.2 720 dpi Printing/Smoothing Feature 4 -15 2.2.1 Canon extension mode 4 -15 2.2.2 Emulation mode 4 -16 2.3 Printing Modes 4 -17 2.4 Optimum Printing Direction Control 4 -17...
  • Page 8 Page 4 -18 2.6 Lithium Ion Battery Recharging 4 -18 2.6.1 Switching to recharge mode 4 -18 2.6.2 Recharge protection 4 -18 2.6.3 Recharge control 4 -19 3. PRINTER MECHANISM 4 -19 3.1 Overview of the Mechanical System of the Printer 4 -20 3.1.1 Mechanical system configuration 4 -21...
  • Page 9 Page 5 - 3 3. APPLYING THE GREASE 5 - 4 4. ADJUSTMENT 5 - 5 5. TROUBLESHOOTING 5 - 5 5.1 Overview of Troubleshooting 5 - 5 5.1.1 Definition 5 - 5 5.1.2 Precautions for troubleshooting 5 - 7 5.2 Error Condition Diagnosis 5 - 7 5.2.1 Diagnosis flowchart...
  • Page 10 III. ILLUSTRATION INDEX Part 1: SAFETY AND PRECAUTIONS Page 1 - 1 Figure 1 - 1 Moving Sections of the Printer 1 - 2 Figure 1 - 2 Ink Path 1 - 3 Figure 1 - 3 Ink Mist 1 - 4 Figure 1 - 4 BJ Cartridge Aluminum Plate 1 - 5...
  • Page 11 Page 3 -24 Figure 3 -19 Waste Ink Absorber (50% Used Sample) 3 -25 Figure 3 -20 EEPROM Settings List Print (Sample) Part 4: TECHNICAL REFERENCE 4 - 1 Figure 4 - 1 Printer Diagram 4 - 4 Figure 4 - 2 Printing Signal Flow 4 - 5 Figure 4 - 3...
  • Page 12 IV. TABLE INDEX Part 3: OPERATING INSTRUCTIONS Page 3 -12 Table 3 - 1 Error Display 3 -15 Table 3 - 2 Function Setting (1) 3 -15 Table 3 - 3 Function Setting (2) Part 4: TECHNICAL REFERENCE Page 4 -16 Table 4 - 1 Printing Modes and Heating Methods 4 -25...

  • Page 13: Part 1: Safety And Precautions

    Part 1 SAFETY AND PRECAUTIONS Page 1 - 1 1. PERSONAL SAFETY PRECAUTIONS 1 - 1 1.1 Moving Sections of the Printer 1 - 2 1.2 Ink Stains 1 - 4 1.3 BJ Cartridge Aluminum Plate 1 - 5 2. MACHINE PRECAUTIONS 1 - 5 2.1 BJ Cartridge 1 - 7...

  • Page 15: Personal Safety Precautions

    Part 1: Safety and Precautions BJC-50 1. PERSONAL SAFETY PRECAUTIONS 1.1 Moving Sections of the Printer Be careful not to let your hair, clothes, accessories, etc., become caught in any of the moving sections of the printer. The moving sections of the printer are the carriage belt, carriage ribbon cable and carriage, which are driven by the carriage motor, and the paper feed gear and roller, pinch roller, eject roller and spurs which are driven by the paper feed motor.

  • Page 16: Ink Stains

    Part 1: Safety and Precautions BJC-50 1.2 Ink Stains 1.2.1 Ink path Be careful not to touch the ink path of the printer and get stains on the work table, hands, clothes, etc., during repair. The ink path is the nozzle section of the BJ cartridge, the head cap, the head wiper, the maintenance jet receiving section and the waste ink absorber.

  • Page 17: Ink Mist

    Part 1: Safety and Precautions BJC-50 1.2.2 Ink mist The BJ cartridge ejects the ink onto the paper. After the printer has been used for a long time or under heavy duty use, a small amount of ink mist bouncing off the paper during printing may soil the platen section and the purge section.

  • Page 18: Bj Cartridge Aluminum Plate

    Part 1: Safety and Precautions BJC-50 1.3 BJ Cartridge Aluminum Plate Do not touch the aluminum plate of the BJ cartridge. The aluminum plate heats up during printing and becomes particularly hot during continuous high duty printing. It also heats up if printing is operated after the ink in the cartridge has run out. Danger ! High Temperature! Figure 1-4 BJ Cartridge Aluminum Plate This printer has the following functions to protect against the above...

  • Page 19: Machine Precautions

    Part 1: Safety and Precautions BJC-50 2. MACHINE PRECAUTIONS 2.1 BJ Cartridge 2.1.1 BJ cartridge handling To prevent clogging at the nozzles due to foreign matters, never touch the nozzle section of the BJ cartridge or wipe it off with tissue paper or the like. For the BJ cartridge, take the same care with the ink filter of the print head body to prevent poor ink suction due to foreign matters.

  • Page 20: Automatically Capping

    Part 1: Safety and Precautions BJC-50 2.1.2 Automatically capping When the power is switched off with the POWER button, the printer automatically caps the nozzle section of the BJ cartridge to protect itself and prevent ink leakage. If you unplug the DC plug by mistake and cut off the power supply to the printer, plug the DC plug back in, start up the printer normally, then switch off the power with the POWER button.

  • Page 21: Ink Cartridge

    Part 1: Safety and Precautions BJC-50 2.2 Ink Cartridge 2.2.1 Ink cartridge handling To prevent poor ink suction due to foreign matters on the ink filter of the print head body, never touch the ink filter of the ink cartridge. When you remove the cap from an ink cartridge, install the ink cartridge on the print head body immediately to prevent clogging at the nozzles due to ink drying or foreign matters.

  • Page 22: Lithium Ion Battery Handling

    Part 1: Safety and Precautions BJC-50 2.3 Lithium Ion Battery Handling 2.3.1 Initial precautions The enclosed lithium ion battery must be installed in the printer and charged prior to its use. To ensure best performance, the lithium ion battery is only charged to 40% of its full capacity at the time of shipping.

  • Page 23: Printer Handling

    Part 1: Safety and Precautions BJC-50 2.4 Printer Handling 2.4.1 Precautions to prevent damage from static electricity The electrical charge accumulated on a person when clothes rub can damage electric elements or change their electrical characteristics. Never touch the contact section of the carriage ribbon cable.

  • Page 24: Ink Leakage Precautions

    Part 1: Safety and Precautions BJC-50 2.4.2 Ink leakage precautions Do not carry, pack or store the printer without a BJ cartridge installed. The ink within the cap section will flow back and soil the inside of the printer. The nozzle section of the BJ cartridge is capped automatically when the power is switched off with the POWER button.

  • Page 25: Precaution For Service

    Part 1: Safety and Precautions BJC-50 3. PRECAUTION FOR SERVICE 3.1 Precautions Concerning the Memory Data This printer counts the total waste ink amount for the black BJ cartridge and the color BJ cartridge and stores these data in the EEPROM on the control board. Observe the following precautions during servicing.

  • Page 26: Precautions To Prevent Damage From Static Electricity

    Part 1: Safety and Precautions BJC-50 3.2 Precautions to Prevent Damage from Static Electricity The electrical charge accumulated on a person when clothes rub can damage electric elements or change their electrical characteristics. In order to prevent static electricity, make sure to touch some metallic part that is grounded to release the static electricity accumulated on your body before disassembling the printer for service.

  • Page 27: Precautions For Disassembly/Assembly

    Part 1: Safety and Precautions BJC-50 3.3 Precautions for Disassembly/Assembly The printer is made by combining many plastic parts. When disassembling the printer, be careful not to brake or bend plastic hooks. Take special care not to rip or bend the flexible cables when removing and reinserting them on the control board as they are very thin and frail.

  • Page 28: Built-In Self-Diagnostic Functions

    Part 1: Safety and Precautions BJC-50 When replacing the IrDA unit, be careful not to touch the light emitting and receiving parts. (Touching these parts may offset the optical axis or soil the lens and possibly inhibit infrared communication.) IrDA unit Figure 1-12 IrDA Unit 3.4 Built-in Self-diagnostic Functions The printer has built-in self-diagnostic functions to judge hardware defects.

  • Page 29: Part 2: Product Specifications

    Part 2 PRODUCT SPECIFICATIONS Page 2 - 1 1. PRODUCT OUTLINE 2 - 1 1.1 Product Outline 2 - 2 1.2 Features 2 - 3 1.3 BJ Cartridge 2 - 5 1.4 Options 2 - 8 1.5 Consumable 2 - 9 2.

  • Page 31: Product Outline

    Part 2: Product Specifications BJC-50 1. PRODUCT OUTLINE 1.1 Product Outline The BJC-50 bubble-jet full-color portable printer was carefully designed to improve mobility and it is more portable than ever. Lighter and more compact than previous models, the BJC-50 has new features such as the lithium ion battery and the exclusive IEEE 1284 compatible cable.

  • Page 32: Features

    • Three built-in standard printer control modes: BJ mode (IBM Proprinter X24E emulation) LQ mode (EPSON LQ printer emulation) Native mode (Canon extended mode) BJL command • Two new user-friendly replaceable black and color BJ cartridges: Black BJ cartridge BC-10: 128 nozzles (black), ink cartridge replaceable.

  • Page 33: Bj Cartridge

    Part 2: Product Specifications BJC-50 1.3 BJ Cartridge 1.3.1 Color BJ cartridge [BC-11e] The BC-11e color BJ cartridge used for color printing is disposable. It comprises the print head with 136 nozzles and the replaceable ink cartridges (black and color). The heater board inside the printhead is located one in front of the other to separately print large and small ink droplets.

  • Page 34: Black Bj Cartridge [Bc-10]

    Part 2: Product Specifications BJC-50 1.3.2 Black BJ cartridge [BC-10] The BC-10 black BJ cartridge used for super-high speed monochrome printing is disposable. It combines the print head with 128 nozzles and the replaceable black ink cartridge. If a print defect occurs, do a head cleaning. If print quality is not restored, try again once or twice.

  • Page 35: Options

    Part 2: Product Specifications BJC-50 1.4 Options 1.4.1 BJ cartridge container The BJ cartridge container is for storing BJ cartridges removed from the printer. When storing a BJ cartridge close the lid securely. One BJ cartridge container can store either the BC-10 or BC-11e. Store the BJ cartridges with the ink cartridges attached.

  • Page 36: Universal Adapter (Ad-360U)

    Part 2: Product Specifications BJC-50 1.4.3 Universal adapter (AD-360U) There is an Universal adapter adapted for each country to supply DC voltage to the printer. There is also a Universal adapter with AC plug cable, which supplies 100-250V AC input voltage to the printer. Universal Adapter AC Plug Cable (for each country) Figure 2-6 Universal Adapter...

  • Page 37: Color Image Scanner Cartridge (Is-12)

    BJ cartridge. Figure 2-7 Color Image Scanner Cartridge 1.4.5 Interface Cable (BIFC-50) The IEEE 1284 compatible bidirectional parallel interface cable uses a Canon exclusive small-size connector on the printer connecting end. The computer connecting end remains unchanged. Figure 2-8 Interface Cable...

  • Page 38: Consumables

    Part 2: Product Specifications BJC-50 1.5 Consumables 1.5.1 BJ cartridge (Color and Black) Replacement BJ cartridges are the same as the ones supplied with the printer. 1.5.2 Ink cartridge The consumable ink cartridges are the same as the ink cartridges installed in the BC- 11e color BJ cartridge and BC-10 black BJ cartridge.
  • Page 39 8. Built-in print control mode BJ mode IBM Proprinter X24E emulation LQ mode Epson LQ printer emulation Native mode (Canon extended mode) BJL command 9. Line feed pitch (n: programmable) BJ mode 1/6", 1/8", n/60", n/72", n/180", n/216", and n/360"...
  • Page 40 Part 2: Product Specifications BJC-50 10. Printing characters Type face Roman, Gothic, Courier, Prestige and Draft Pitch BJ mode 10, 12, 17 cpi, and PS LQ mode 10, 12, 15, 17, 20 cpi, and PS Character matrix HQ mode 36 (H) 48 (V) dots HS mode 18 out of 36 (H)

  • Page 41: Bj Cartridge (Color And Black)

    Part 2: Product Specifications BJC-50 16. BJ cartridge 1) BC-11e Type Ink cartridge replaceable type of color BJ cartridge (large and small ink droplet producing type.) Print head 136 nozzles (vertically-lined) Y, M, C (24 nozzles 3) + Bk (64 nozzles) Ink color Yellow, Magenta, Cyan, Black No.
  • Page 42 Part 2: Product Specifications BJC-50 20. Power supply [using the Universal adaptor (AD-360U)] Voltage/Frequency Power Consumption Stand-by Status Recharging USA/Canada AC120V, 60 Hz UK/Australia AC240V, 50 Hz Max. 30W Max. 5W Max. 10W Europe AC230V, 50 Hz 21. External dimensions 300 mm (11.8") W 112.5 mm (4.4") D 49 mm (1.9") H...

  • Page 43: Paper Specifications

    European DL-size (220 mm 110 mm) 2. Paper type Plain paper Coated paper (Canon coated paper LC-101/HR-101, A4/LTR) Envelope (Commercial number 10 or DL-size) Transparency (Canon transparency film CF-102, A4/LTR) BPF (Canon back print film BF-102, A4/LTR) Glossy paper (Canon glossy paper GP-201, A4/LTR)
  • Page 44 Part 2: Product Specifications BJC-50 4. Printing range 1) Plain paper and special media The shaded position in the following figure shows the recommended printing area for papers and special media. The printer’s mechanical printing area is inside the 3 mm top/bottom margins.

  • Page 45: Interface Specifications

    Part 2: Product Specifications BJC-50 2.3 Interface Specifications 2.3.1 Parallel interface 1) Interface Type: Bidirectional Centronics Interface (IEEE 1284 compatible) 2) Operation mode: Compatibility mode / Nibble mode / ECP mode 3) Signal voltage levels: Input Output 0.0 V to +0.8 V 0.0V to +0.4 V High +2.0 V to +5.0 V...
  • Page 46 Part 2: Product Specifications BJC-50 8) Input / output signals COMPATIBILITY MODE STROBE [Input]: When the printer receives the STROBE signal low pulse width must be greater than 1.0 µs from the computer, the printer reads the data from the interface and sets the BUSY signal high.
  • Page 47 Part 2: Product Specifications BJC-50 ERROR [Output]: The printer sets the ERROR signal low if the printer detects an error or out-of-paper condition. SELECT IN [Input]: The DC1 and DC3 control codes become valid when this signal is high and invalid at low.
  • Page 48 Part 2: Product Specifications BJC-50 ECP MODE STROBE [Input] (Host Clk): STROBE signal handshakes with the BUSY signal (Periph Ack) to transmit data from the computer to the printer during the forward phase. When STROBE signal is low, it indicates that data has been sent to data bus. Reverse phase is always high. DATA 1~8 [Input]: When the host computer outputs data during the forward phase, DATA signal is input signal.
  • Page 49 Part 2: Product Specifications BJC-50 9) Timing 1.0 s 1.0 s 1.0 s DATA 1-8 STROBE BUSY ACKNLG 3.5 s min. Figure 2-12 Timing Chart (Compatibility Mode) 1284 Active (SELECT IN) AckDataReq Data bit 2 Data bit 6 (PE) Data (1 - 8) 0000 0000 HostBusy (AUTO FEED XT)

  • Page 50: Infrared Interface

    Part 2: Product Specifications BJC-50 2.3.2 Infrared interface 1. IrDA Interface 1) Interface IrDA Version 1.0 compatible 2) Optical specifications Light generation Wavelength: 0.85 to 0.90 m Intensity: 40 to 500 mW/Sr Light angle: ±15° to 30° (along optical axis) Light interception Wavelength: 0.85 to 0.90 m...
  • Page 51 Part 2: Product Specifications BJC-50 2. ASK Interface 1) Interface SHARP Liquid Crystal Pen Computer: ZAURUS compatible 2) Optical specifications Light generation Wavelength: 0.85 to 0.90 m Intensity: 40 to 500 mW/Sr Light angle: ±15° to 30° (along optical axis) Light interception Wavelength: 0.85 to 0.90 m...

  • Page 52: Character Code Tables

    Part 2: Product Specifications BJC-50 2.4 Character Code Tables Code page 437 Code page 850 2-22...
  • Page 53 Part 2: Product Specifications BJC-50 Code page 860 Code page 863 2-23...
  • Page 54 Part 2: Product Specifications BJC-50 Code page 865 Code page 857 2-24...
  • Page 55 Part 2: Product Specifications BJC-50 Code page 855 Code page 852 2-25...
  • Page 56 Part 2: Product Specifications BJC-50 Code page 864 Code page 869 2-26...

  • Page 57: Part 3: Operating Instructions

    Part 3 OPERATING INSTRUCTIONS Page 3 - 1 1. PRINTER SETUP 3 - 1 1.1 Unpacking 3 - 2 1.2 Installation 3 -10 1.3 Names and Functions of Parts 3 -11 2. TRANSPORTING THE PRINTER 3 -11 2.1 Carrying the Printer 3 -11 2.2 Transporting the Printer 3 -12...

  • Page 59: Printer Setup

    Part 3: Operating Instructions BJC-50 1. PRINTER SETUP 1.1 Unpacking After unpacking, check that you have the following: Universal Adapter BJ Cartridges Cartridge Container AC Plug Cable User’s Manual Packing Lithium Ion Interface Cable Battery (LB-50) (BIFC-50) Packing Printer Tapes Figure 3-1 Packing Arrangement...

  • Page 60: Installation

    Part 3: Operating Instructions BJC-50 1.2 Installation 1.2.1 Installation space Install the printer with the clearances given below for the printer to be operated efficiently. The spaces required to install the printer are shown below. 49mm Figure 3-2 Installation Space •...

  • Page 61: Installation Procedure

    Part 3: Operating Instructions BJC-50 1.2.2 Installation procedure a) Connecting the Universal adapter Insert the DC plug into the Universal adapter connector of the printer and the AC plug of the Universal adapter into the outlet. Mount the lithium ion battery on the printer.
  • Page 62 Part 3: Operating Instructions BJC-50 c) Connecting the Infrared interface When transmitting data from the computer to the printer through the built-in IrDA, beware of the following: • The printer and computer IrDA transitters should be within 1 m of each other. (Depending on the computer, infrared rays may not reach the printer's IrDA transmitter) •...
  • Page 63 Part 3: Operating Instructions BJC-50 d) Switching on the power Make sure the lock switch is not locked and then press the POWER button to switch on the power. When the printer is powered up, it carries out the initial operation, then moves the carriage to the cartridge replacing position (center of the printer).
  • Page 64 Part 3: Operating Instructions BJC-50 2) Installing the BJ cartridge Open the printer head cover, and install a BJ cartridge in the carriage. Press the CARTRIDGE button to return the carriage to the capping position. Color BJ Cartridge Black BJ Cartridge Figure 3-7 Installing the BJ Cartridge If the BJ cartridge is not installed correctly, the beeper sounds once when the CARTRIDGE button is pressed, and the carriage cannot be returned to...
  • Page 65 Part 3: Operating Instructions BJC-50 f) Replacing the ink cartridge The ink cartridge of the black BJ cartridge and color BJ cartridge can be replaced. (BCI-10, BCI-11 Bk, BCI-11 color) 1) Ink cartridge replacement criteria If the ink runs out or if more than six months have passed after the BJ cartridge was unsealed and the print quality is not improved by performing cleaning once or twice, the ink cartridge should be replaced with a new one.
  • Page 66 Part 3: Operating Instructions BJC-50 3) Installing the ink cartridge Take out the ink cartridge from its packaging, remove the protective cap for the ink inlet as shown in the figure, and install the ink cartridge in the printer with the reverse order as when removing it.
  • Page 67 Part 3: Operating Instructions BJC-50 h) Manual paper feeding Open the paper feeding tray and manually feed paper one sheet at a time. Align the left side of the paper with the left side of the paper tray and slide the paper guide to keep the paper straight and prevent skewing.

  • Page 68: Names And Functions Of Parts

    Notlighting: OFF Blinking: Error, Warning or Data Transmitting Parallel Interface Connector Connects the centronics compatible parallel interface cable to the printer. The printer connector uses a Canon exclusive small-size connector. IrDA Module Figure 3-11 Names and Functions of Parts 3-10...

  • Page 69: Transporting The Printer

    Part 3: Operating Instructions BJC-50 2. TRANSPORTING THE PRINTER When carrying or transporting the printer, leave the BJ cartridge in or place it in the cartridge container to prevent ink leakage and drying of cartridge nozzles. The printer may be left installed. 2.1 Carrying the Printer Before carrying the printer, do the following: 1) Press the POWER button to turn the printer off and close the top cover.

  • Page 70: Printer Servicing Functions

    Part 3: Operating Instructions BJC-50 3. PRINTER SERVICING FUNCTIONS 3.1 Error Indications The LED in combination with the beeper indicates the nature of 3 kinds of errors: fatal, error and warning. CARTRIDGE CHARGE POWER RESUME ERROR Figure 3-12 Control Panel Fatal Error: The ERROR indicator and POWER indicator blink simultaneously.
  • Page 71 Part 3: Operating Instructions BJC-50 Recoverable errors by customer: 1) Paper pick-up error: Occurs when the paper cannot be fed properly. 2) Paper delivery error: Occurs when the printed paper cannot be ejected. 3) BJ Cartridge check: Occurs when a BJ cartridge is not installed and the cartridge replacement mode is terminated by the printer.
  • Page 72 Part 3: Operating Instructions BJC-50 15) Print position detection error: Occurs during when the home position cannot be detected during the print position detection process. 16) Failed recharge circuit error: Occurs when the printer is turned on and detects the battery's recharging current higher than set value at the time.

  • Page 73: Function Setting

    Part 3: Operating Instructions BJC-50 3.2 Function Setting Each printer function settings are set from the host computer using the printer setup utility in an exclusive Windows compatible driver. 3.2.1 Default setting The default setting can be set by button operation when the power is turned on. When the printer is turned on, hold down the POWER button until the beeper sounds the specified number of times.

  • Page 74: Control Buttons

    Part 3: Operating Instructions BJC-50 3.3 Control Buttons 3.3.1 Cleaning the BJ cartridge If the printed image is blurred or a print defect occurs, such as a white steaking, print a test pattern to see whether the BJ cartridge is clogged with ink. If nozzles are clogged with ink, use the RESUME button to clean the BJ cartridge and nozzles.

  • Page 75: Self Test Print

    Part 3: Operating Instructions BJC-50 3.4 Self Test Print The printer has the "off-line" self test function which can be executed without connection to a computer. This section explains how to execute the off-line self test. While the printer is off line, hold down the POWER button until the beeper sounds the specified number of times listed below, then press the RESUME button to start the off- line test print through the manual feeder.

  • Page 76: Demonstration Print

    Part 3: Operating Instructions BJC-50 3.4.1 Demonstration print Figure 3-13 Demonstration Print (Sample) 3-18...

  • Page 77: Function Settings List Print

    Part 3: Operating Instructions BJC-50 3.4.2 Function settings list print Figure 3-14 Function Settings List Print (Sample) 3-19...

  • Page 78: Ripple Pattern Print

    Part 3: Operating Instructions BJC-50 3.4.3 Ripple pattern print Figure 3-15 Ripple Pattern Print (Sample) 3-20...

  • Page 79: Nozzle Check Pattern Print

    Part 3: Operating Instructions BJC-50 3.4.4 Nozzle check pattern print Print out this pattern using all nozzles of the BJ cartridge. In the event that print defects appear, perform a cleaning operation of the head. If print quality does not improve even after the cartridge is cleaned once or twice times, replace the BJ cartridge.

  • Page 80: Hexadecimal Dump Test Print

    Part 3: Operating Instructions BJC-50 3.5 Hexadecimal Dump Test Print The printer has the "on-line" self test function that outputs hexadecimal dump data when it is connected to a computer. The hexadecimal dump test is carried out when the printer is on line to print the data coming from the computer in hexadecimal code (hexadecimal data).

  • Page 81: Eeprom Data Setting

    Part 3: Operating Instructions BJC-50 3.6 EEPROM Data Setting 3.6.1 EEPROM data setting mode The required EEPROM data is set in this mode when replacing the control PCB assembly or the printer base unit (including the waste ink absorber). The EEPROM (IC14) on the control PCB assembly contains machine specific data, such as waste ink amount and the remaining quantity of ink in the ink cartridge.

  • Page 82: Displaying Eeprom Data

    Part 3: Operating Instructions BJC-50 3.6.3 Displaying EEPROM data Printer Base Unit 25 % 50 % 75 % 100 % Replacement Ink Absorber Purge Unit Side Waste Ink Figure 3-19 Waste Ink Absorber (50% Used Sample) The EEPROM contains the total waste ink amount and the total number of pages fed, which are counted while the printer is used.

  • Page 83: Eeprom Settings List Print

    Part 3: Operating Instructions BJC-50 3.6.4 EEPROM settings list print Figure 3-20 EEPROM Settings List Print (Sample) 3-25...

  • Page 84: Rewriting Flash Rom

    Part 3: Operating Instructions BJC-50 3.7 Rewriting Flash ROM 3.7.1 Flash ROM rewrite mode This mode can only be accessed by a service person. The flash ROM program can be rewritten using this mode. When upgrading the ROM, a floppy disk containing the upgraded program will be provided.
  • Page 85 Part 3: Operating Instructions BJC-50 If you get a rewrite error, reset the following: Error message POWER indicator ERROR indicator Beepers DATA error Lights Blinks 2 long beepers FLASH error Blinks Blinks (alternates with 2 long beepers POWER indicator) RAM error Blinks Blinks (simultaneous with 2 long beepers...
  • Page 86 Part 3: Operating Instructions BJC-50 This page intentionally left blank 3-28...

  • Page 87: Part 4: Technical Reference

    Part 4 TECHNICAL REFERENCE Page Page 4 - 1 1. OVERVIEW 4 -30 3.4 Paper Feed Mechanism 4 - 1 1.1 Printer Block Diagram 4 -32 3.5 Carriage Section 4 - 2 1.2 Initial Flowchart 4 -34 4. PRINTER ELECTRICAL SYSTEM 4 - 4 1.3 Print Signal Flow 4 -34...

  • Page 89: Overview

    Part 4: Technical Reference BJC-50 1. OVERVIEW 1.1 Printer Block Diagram Lithium Ion Battery Universal Adapter CNBT Control Board CAR- POWER POWER CHARGE ERROR TRIDGE SUME EEPROM Flash ROM A S I C FONT ROM DRAM Driver Driver CNCR1 CNLF1 CNSEN1 CNSEN2 Carriage Motor...

  • Page 90: Initial Flowchart

    Part 4: Technical Reference BJC-50 1.2 Initial Flowchart 1.2.1 Print mode Connenct Universal adapter. Insert the DC plug of the Universal adaptor ASIC initialization Hardware initialization LED lightout Factory mode check Software initialization RAM check ROM check Charge check Turn the power on with the POWER button. Press the Note) Lithium ion battery initialization POWER button...

  • Page 91: Scanner Mode

    Part 4: Technical Reference BJC-50 1.2.2 Scanner mode When powered on, the printer starts up in the printer mode regardless of the printer head type. Once the printer is on, it stands by to receive a data or a command. When the printer recognizes the scanner activation command, the printer starts operating in the scanner mode.

  • Page 92: Print Signal Flow

    Part 4: Technical Reference BJC-50 1.3 Print Signal Flow The print signal flow from when the printer receives the print data to when printing is executed is described below. a) The print data (including the control signals) output by the computer is received by the ASIC through the interface, which is controlled by the ASIC on the logic board.

  • Page 93: Print Drive

    Part 4: Technical Reference BJC-50 1.4 Print Drive The printer outputs control signals from the ASIC's printer controller to the BJ head to eject ink from the BJ head for printing. The control signals consist of the print control signal for ejecting ink from the head's nozzles and the temperature control signal for adjusting the head's temperature so that the amount of ink ejected is uniform.
  • Page 94 Part 4: Technical Reference BJC-50 The HEAT ENABLE signals control the ejection of small and large ink droplets as follows: For each color, (Y, M and C), HENB B and A signals drive the front and back nozzle heaters respectively. For black, HENB C and D signals drive the front and back nozzle heaters respectively.

  • Page 95: Scanner Drive

    Part 4: Technical Reference BJC-50 1.5 Scanner Drive The scanner cartridge is recognized by the scanner cartridge contacts and TOP.S, C.CHA and C.CHK signals. These three signals are equivalent to the TOP, DIODE A and DIODE K signals of the BJ cartridge. Color distinction is performed by ID 0 and ID 1 as in the BJ cartridge.

  • Page 96: Power Off Operation Flow

    Part 4: Technical Reference BJC-50 1.6 Power Off Operation Flow Indicator blinks Finish the cleaning and paper feeding Motor, BJ cartridge, and buzzers are all off operation before turning off <In case it is not capped> Paper feed motor, initialization operation <In case of cartridge replacement mode>...

  • Page 97: Firmware

    Part 4: Technical Reference BJC-50 2. FIRMWARE 2.1 Interface The printer supports a parallel interface and IrDA interface. The parallel interface is compatible with the bidirectional Centronics interface-standard (IEEE 1284). Compatible mode is the same as the Centronics interface-standard protocol. IrDA is an infrared data communication interface that is compatible with IrDA (1.0).

  • Page 98: Nibble Mode

    Part 4: Technical Reference BJC-50 2.1.2 Nibble mode In nibble mode, the printer transfers data twice to the host computer in 4-bit units. The data is transferred with the PtrClk signal and HostBusy signal handshakes. After the printer negotiates with the host computer and enters the nibble mode, the printer confirms that the HostBusy signal is low, outputs a PtrClk signal with a nibble setting on the lower bits and lowers the PtrClk signal.

  • Page 99: Ecp Mode

    Part 4: Technical Reference BJC-50 2.1.3 ECP mode In ECP mode, the PeriphAck signal and the HostClk signal handshake to communicate. After the host computer negotiates with the printer, the printer raises the PeriphClk signal and the host computer lowers the HostAck signals. At this point the host computer sets the data on the bus and lowers the HostClk signal to transmit the data.

  • Page 100: Irda

    Part 4: Technical Reference BJC-50 2.1.4 IrDA IrDA is an IrDA (1.0) conforming infrared serial communicating device that is built-in on the back side of the printer. Input and output of infrared light is conducted through this device. For wireless infrared one-to-one communication, the computer's IrDA and the printer's IrDA must be facing each other.
  • Page 101 Part 4: Technical Reference BJC-50 • Base band transmission format (IrDA) Infrared Pulses Electric Signals Data 0: Infrared pulse emission 1 1 0 0 1 0 1 1 0 0 1 0 Data 1: No infrared pulse emission Serial Serial Communication Communication Controller TxD...
  • Page 102 Part 4: Technical Reference BJC-50 b) IrDA standard To connect data transmission devices using infrared communication, the protocols physical and transport layers have been standardized. 1) Physical Layer (IrDA-SIR) 2) Dataring Layer (IrLAP and IrLMP) 3) Transport Layer (IrTP) The Printer does not have a IrTP in the transport layer. In the physical layer standards (IrDA-SIR), the infrared signal are established.

  • Page 103: Dpi Printing/Smoothing Feature

    2.2 720 dpi Printing/Smoothing Feature 2.2.1 Canon extension mode In Canon extension mode, the printer driver creates 720 dpi data for the horizontal axis and sends it to the printer, allowing the printer to archive high-quality printing. With a black BJ cartridge installed, the printer driver smoothes the printed character's edges to 720 dpi along the horizontal axis.

  • Page 104: Printing Modes

    Part 4: Technical Reference BJC-50 2.3 Printing Modes Depending on the cartridge installed, the medium, the printing mode, the resolution, the print data, etc., the printer varies the carriage movement, bubble jet head driving frequency, etc., to attain high-quality printing without any bleeding or shifting in the printout.

  • Page 105: Optimum Printing Direction Control

    Part 4: Technical Reference BJC-50 2.4 Optimum Printing Direction Control To prevent vertical misalignment of the printed characters, etc., when print data is printed continuously in the direction of the paper feeding direction, printing is executed with the carriage moving from only one direction. However, when printing in the paper feed direction is not continuous, since vertical misalignment is not so noticeable, the printing direction is alternated so that printing is also executed from the opposite carriage direction.

  • Page 106: Lithium Ion Battery Recharging

    Part 4: Technical Reference BJC-50 2.6 Lithium Ion Battery Recharging 2.6.1 Switching to recharge mode The lithium ion battery must always be installed in the printer as the recharging circuit for the battery is inside the printer. When the printer is in stand-by mode or soft power OFF, the battery begins to recharge.

  • Page 107: Printer Mechanism

    Part 4: Technical Reference BJC-50 3. PRINTER MECHANISM 3.1 Overview of the Mechanical System of the Printer The mechanical system of the printer is comprised of the ink/BJ cartridge, purge section, paper feed section, and the carriage section. The paper pick up/delivery operation of the mechanical system of the printer and the BJ cartridge maintenance operation are carried out by the paper feed motor and carriage motor.

  • Page 108: Mechanical System Configuration

    Part 4: Technical Reference BJC-50 3.1.1 Mechanical system configuration a) Ink/BJ cartridge The black BJ cartridge (BC-10) has a 360-dpi resolution and 128 nozzles, and the color BJ cartridge (BC-11e) has a 360-dpi resolution, and 64 black nozzles, 24 yellow, 24 magenta, and 24 cyan nozzles. You can print in either black or color simply by replacing the BJ cartridge.

  • Page 109: Bj Cartridge

    Part 4: Technical Reference BJC-50 3.2 BJ Cartridge 3.2.1 Color BJ cartridge structure The color BJ cartridge contains a 136-nozzle print head (64 black nozzles, 24 yellow nozzles, 24 magenta nozzles, and 24 cyan nozzles) for four colors. The print head, black ink cartridge, and color ink cartridges are designed to be replaced respectively.

  • Page 110: Black Bj Cartridge Structure

    Part 4: Technical Reference BJC-50 3.2.2 Black BJ cartridge structure The black BJ cartridge contains a 128-nozzle print head, and the print head and black ink cartridge can be replaced respectively. a) Air hole Air hole is provided in order to keep the ink cartridge at the same pressure as the outer atmospheric pressure.

  • Page 111: Bubble Jet Head-Unit Structure

    Part 4: Technical Reference BJC-50 3.2.3 Bubble jet head-unit structure a) Bubble jet nozzles The ink in the ink sponge is filtered through a meshed ink filter, and is fed to the bubble-jet nozzles through the ink path in the holder. When the head-drive-current flows to the heater board of each nozzle, ink is heated up, and bubbles are produced and subsequently form into one large bubble.
  • Page 112 Part 4: Technical Reference BJC-50 b) Nozzle arrangement The bubble jet nozzles are arranged in a vertical line at intervals of 1/360 inch. Nozzle 136 Nozzle 128 Black Nozzles 73 ~ 136 Cyan Nozzles 49 ~ 72 Magenta Nozzles 25 ~ 48 Yellow Nozzles 1 ~ 24 Nozzle 1...
  • Page 113 Part 4: Technical Reference BJC-50 TABLE 4-2 SIGNAL CONTACT PART Pin No. Signal name IN/OUT Description / (scanner cartridge in use) VHG (LAMPG) GND for head drive voltage VH (GND for scanner drive voltage 24V) VHG (LAMPG) GND for head drive voltage VH (GND for scanner drive voltage 24V) MCH0 (N.C.) Drive signal for temperature control heater (Unused)

  • Page 114: Head-Maintenance Function And Structure

    Part 4: Technical Reference BJC-50 3.2.4 Head-maintenance function and structure Carriage Wiping Hooks Wiper Pump Figure 4-19 Purge Section a) Cleaning function Cleaning operation is performed to correct the print quality problem, which is caused by none-ejection of ink, and to prevent the print defects resulting from improper ink ejection from the BJ cartridge head nozzles.
  • Page 115 Part 4: Technical Reference BJC-50 b) Purging Purging is performed to correct/prevent the non-ejection of ink, which is caused by unnecessary bubbles and dust on the head faceplate. The cap and pump in the purge section are used for purging operation. c) Capping Capping operation is performed to correct/prevent the non-ejection of ink, which is caused by the dried-up of ink inside nozzles.

  • Page 116: Purge Section Structure

    Part 4: Technical Reference BJC-50 3.3 Purge Section Structure 3.3.1 Configuration Wiper Paper Feed W-gear Trigger Gear Paper Feed Gear Pump Gear Pump Arm Cylinder Gear Pump Piston Shaft Waste Ink Absorber Figure 4-21 Purge Section Structure a) Cap section When the carriage is at the home position, the cap is pressed against the print head faceplate to cap the head.

  • Page 117: Operation

    Part 4: Technical Reference BJC-50 3.3.2 Operation The purge section is driven by the paper feed motor. The paper feed motor drives the paper feed gear through the paper feed double gear. When the carriage moves to the right from the home position, the trigger gear rotates along with the paper feed gear, which rotates the pump gear and cylinder gear.

  • Page 118: Paper Feed Mechanism

    Part 4: Technical Reference BJC-50 3.4 Paper Feed Mechanism 3.4.1 Outline of paper feed mechanism In this printer paper is fed manually, one sheet at a time. The paper feed mechanism of the printer is divided into the paper pick-up section and printing/paper-delivery section.
  • Page 119 Part 4: Technical Reference BJC-50 c) Automatic head-to-paper adjustment A coil spring pushes up the eject idle roller and the eject roller towards the paper feed roller and the spurs to maintain a constant head-to paper distance regardless of paper thickness. Hence, a paper thickness lever is not necessary and there is no need to adjust the carriage position according to paper thickness.

  • Page 120: Carriage Section

    Part 4: Technical Reference BJC-50 3.5 Carriage Section 3.5.1 Carriage section function a) Ink/BJ cartridge mounting function The carriage holds the BJ cartridge and connects it electronically to the control board through the carriage ribbon cable. When the power is off, the carriage is locked at the capping position where the carriage is locked by the lock arm.

  • Page 121: Carriage Section Structure

    Part 4: Technical Reference BJC-50 3.5.2 Carriage section structure a) BJ cartridge mounting section The BJ cartridge is fixed to the carriage by the carriage contact spring. When the BJ cartridge is mounted on the carriage, the contacts of the carriage ribbon cable connect with the signal contacts of the BJ cartridge to transfer printing signals sent from the control board.

  • Page 122: Printer Electrical System

    Part 4: Technical Reference BJC-50 4. PRINTER ELECTRICAL SYSTEM 4.1 Overview The electrical system is handled by the control section and the power supply section. The printer control section converts the data from the computer into print signals or printer operation signals and drives the BJ cartridge and motors while monitoring the status of the sensors.

  • Page 123: Signal Control Section

    Part 4: Technical Reference BJC-50 4.2 Signal Control Section 4.2.1 Control board block diagram A: Printer Internal B: Voltage Input Temperature Recharging Battery Head Rank Voltage Head ID Recharge Current Head Temperature Battery Temperature Paper Feed Motor CR Motor Analog Paper Feed Carriage Switch...

  • Page 124: Control Section Components

    Part 4: Technical Reference BJC-50 4.2.2 Control section components a) ASIC (IC6) The ASIC is comprised of the MPU section and the printer controller section. It has a built-in 16-bit CPU and the operating synchronized frequency is 23.04 MHz. The printer controller's operating synchronized frequencies are 23.04 MHz and 24.00 MHz.
  • Page 125 Part 4: Technical Reference BJC-50 2) Printer controller section The printer controller contains the parallel interface controller, print head controller, scanner head controller, CR motor controller, paper feed motor controller, buffer controller, DRAM controller, recharge controller, etc. It operate in synchronization with an external 23.04 MHz external clock input.
  • Page 126 Part 4: Technical Reference BJC-50 c) DRAM (IC4) Controlled by the ASIC, the 4 M-bit DRAM is used as a receive buffer, download buffer, print buffer, and working area. d) Paper feed motor driver IC/Carriage motor driver IC (IC15/IC16/IC12) The paper feed motor driver IC (IC15/16) is a constant-voltage bipolar driver IC. There are two types of signals that are outputted from the ASIC: a paper feed motor drive control signal and a head drive control signal.

  • Page 127: Power Supply Section

    Part 4: Technical Reference BJC-50 4.3 Power Supply Section 4.3.1 Block diagram of power supply section Connector CNDC 1 Universal Adapter 13.5 Vdc Vpp Output Supply the power to motor and beeper Step-down Protective Circuit Vcc 1 Output Transformer Noise (5.1 0.25Vdc) Filter DC/DC...

  • Page 128: Power Supply Section Structure

    Part 4: Technical Reference BJC-50 4.3.2 Power supply section structure a) Input power supply The voltage input to the power supply section is 13.5 ± 0.5 VDC. It is supplied by two sources: the Universal adapter and the lithium ion battery. When the DC plug is inserted into the power connector, 13 VDC is supplied to the power control section on the control board.

  • Page 129: Lithium Ion Battery Recharging Circuit

    Part 4: Technical Reference BJC-50 4.3.3 Lithium Ion Battery Recharging Circuit Pre-recharging Circuit Lithium Ion Battery Pack Vcc1 Constant Current/Voltage Recharging Circuit Constant Current/ ASIC Vcc1 Voltage Recharge CHG-ON Control IC Battery Temperature ICP2 Charging Current CHGLEV Detection Amplifier Battery Voltage BATLEV Detection Circuit DCLEV...

  • Page 130: Lithium Ion Battery

    Part 4: Technical Reference BJC-50 a) Pre-recharging Circuit When the lithium ion battery voltage is low, the pre-recharging circuit and small amounts of electrical current are used to raise the voltage. Once the voltage level rises to the normal level, this circuit is stopped. b) Constant Current/Voltage Recharging Circuit Constant current is maintained until the lithium ion battery voltage reaches 12.3 V.
  • Page 131 Part 4: Technical Reference BJC-50 c) Battery temperature detection The thermistor inside the lithium ion battery pack measures the internal battery temperature and detects whether the battery is installed or not. This thermistor is connected between the T terminal and negative terminal of the battery pack. ASIC uses the A/D value of the thermistor's output voltage, THBAT, to determine whether the battery temperature is normal.

  • Page 132: Detection Function

    Part 4: Technical Reference BJC-50 5. DETECTION FUNCTION The printer uses HP sensor, paper end sensor, delivery sensor, inside temperature sensor, and head temperature sensor. Also, the capacity of the waste ink absorber is stored in the EEPROM. When the absorber is about to become full a warning is given and when full an error will occur.

  • Page 133: Waste Ink Level Detection

    Part 4: Technical Reference BJC-50 5.6 Waste Ink Level Detection Ink ejected by the maintenance jet or collected from purging during recovery is absorbed by the waste ink absorber. The total amount of ink consumed is calculated by adding the number of dots ejected and the recovery counts. The EEPROM waste ink counter is divided into the following sub-counters: Maintenance counter ng counter...

  • Page 134: Scanner Cartridge

    Part 4: Technical Reference BJC-50 6. SCANNER CARTRIDGE 6.1 Scanner Cartridge Overview The scanner cartridge is a replaceable scanner unit that carries a one-line 128 pixel BASIS. The scanner separates each of the three RGB primary colors of the LED by scanning the same line three times.

  • Page 135: Scanner Cartridge Structure

    Part 4: Technical Reference BJC-50 6.2 Scanner Cartridge Structure Slit BASIS Mirror Field Lens Imaging Lens BASIS Mirror Imaging Lens Field Lens Diffusion Board Scanning Document Illumination Lens Platen LEDs Diffusion Board Illumination Lens Figure 4-34 Scanner Cartridge 1) LED Red, green and blue LEDs are used to illuminate the scanning document.
  • Page 136 Part 4: Technical Reference BJC-50 8) Scanner controller The scanner controller is an IC that controls the BASIS and processes the analog signal output from the BASIS. The scanner controller also controls the following image processing: • Black level Correction The black level is set to maximum BASIS output.

  • Page 137: Signal Contacts

    Part 4: Technical Reference BJC-50 6.3 Signal Contacts The scanner cartridge is recognized by TOP.S, DIAS and CCHK signals. The scanned image output to the printer is transmitted with a SCLOCK signal in sync with a SDATA signal. The scanner is controlled by the internal register setting signals, CMD0, 1, 2 and 3. 11 12 13 14 4 6 5 Scanner Cartridge...

  • Page 138: Scan Mode

    Part 4: Technical Reference BJC-50 6.4 Scan Mode TABLE 4-7 LIST OF SCAN MODE Scanning Image Pixel Width Scanning Resolution Color Carriage Speed Black & White (dpi) Multi Value Multi Value Binary 48 dots 48 dots 128 dots 3.91 KHz 64 dots 64 dots 128 dots...

  • Page 139: Part 5: Maintenance

    Part 5 MAINTENANCE Page 5 - 1 1. MAINTENANCE 5 - 1 1.1 Periodically-replaced Parts 5 - 1 1.2 Consumables 5 - 1 1.3 Periodic Maintenance 5 - 2 2. SERVICE TOOLS 5 - 2 2.1 List of Tools 5 - 3 3.

  • Page 141: Maintenance

    Part 5: Maintenance BJC-50 1. MAINTENANCE 1.1 Periodically-replaced Parts Level Periodically-replaced parts User None Service engineer None 1.2 Consumables Level Consumables User Black BJ cartridge BC-10 Color BJ cartridge BC-11e Ink cartridge BCI-10 Black BCI-11 Black BCI-11 Color Lithium ion battery LB-50 Service engineer None...

  • Page 142: Service Tools

    Part 5: Maintenance BJC-50 2. SERVICE TOOLS 2.1 List of Tools General tool Phillips screwdriver For removing screws (M2.6) Flathead screwdriver For removing plastic parts Multi Mater For troubleshooting Tweezers For fitting and removing flexible cables Special tool Grease MOLYKOTE PG-641 (CK-0562-000)

  • Page 143: Applying The Grease

    Part 5: Maintenance BJC-50 3. APPLYING THE GREASE The points to grease with a special tool are shown below. Apply a thin coat of grease to the specified points. See the Part Catalog for details of the printer disassembling and reassembling procedures. Take special care not to apply grease to the wiper or the cap when greasing the guide shaft.

  • Page 144: Adjustment

    Part 5: Maintenance BJC-50 4. ADJUSTMENT No parts need to be adjusted.

  • Page 145: Troubleshooting

    Part 5: Maintenance BJC-50 5. TROUBLESHOOTING 5.1 Overview of Troubleshooting 5.1.1 Definition Troubleshooting consists of error condition diagnosis, which is required if the cause of an error is unknown, and error recovery, which is performed if the cause of an error is known.
  • Page 146 Part 5: Maintenance BJC-50 5. Several measures may be described in the error condition diagnosis and error recovery. They are shown in each step to be done to solve the problem. Do a test print after completing each step to make sure the problem has been eliminated.

  • Page 147: Error Condition Diagnosis

    Part 5: Maintenance BJC-50 5.2 Error Condition Diagnosis 5.2.1 Diagnosis flowchart Indicators When DC power is supplied : Lights : Blinks START Does not light Leave the lithium ion battery installed. Insert the DC jack of the universal adapter. Is the printer in the factory mode? Specify that the printer...
  • Page 148 Part 5: Maintenance BJC-50 When the power is turned on with the POWER button START Press the POWER button. POWER indicator blinks. RAM check ROM check Correct? RAM error ROM error POWER ERROR RAM ERROR: 2 beeps Read the hardware ROM ERROR: 1 beep power-on time, software power-on time, and cap...
  • Page 149 Part 5: Maintenance BJC-50 Previous page Check the waste ink capacity. Correct? If it is 84000mg or higher, Warning Error waste ink full error. If it is 83160mg, waste ink capacity Check the battery voltage. warning. POWER ERROR POWER ERROR 5 beeps 5 beeps Battery OK?
  • Page 150 Part 5: Maintenance BJC-50 Previous page Feed out the paper in the printer. Is the paper fed out? Paper output error. ERROR POWER Detected by the paper Check condition for 2 Beeps delivery sensor automatic recovery operation. Check battery voltage. Correct? If it is 6.5V or lower, Warning...

  • Page 151: Error Recovery

    Part 5: Maintenance BJC-50 5.2.2 Error recovery a) Error display <Cause> During initialization, the content in ROM cannot be 1. ROM Error read. <Suspected parts> Flash ROM/FONT ROM <Measure> Replace control board. <Cause> RAM reading and writing cannot be done properly. 2.
  • Page 152 Part 5: Maintenance BJC-50 <Cause> The home position sensor cannot detect the carriage. 4. Home Position <Suspected part> Home position sensor, carriage motor, Sensor Error paper feed motor, control board <Measure> Visually check for disconnected gears, removed parts, Visually check the deformation, or jammed paper.
  • Page 153 Part 5: Maintenance BJC-50 Previous page Check the carriage Carriage Motor motor and paper feed motor. Meter connection Reading CNLR Approx. 8.3 Pin No Disconnect the carriage motor connector from the control board before check. Figure 5-3 Carriage Motor Paper Feed Motor Meter connection Reading CNLF...

  • Page 154: Print Position

    Part 5: Maintenance BJC-50 <Cause> Print position correction cannot be detected properly. 5. Print Position <Suspected part> Carriage motor, control board,home position sensor Correction <Measure> Same as when the home position sensor error is Detection Error displayed. <Cause> The voltage of the lithium ion battery is incorrect. 6.
  • Page 155 Part 5: Maintenance BJC-50 <Cause> The head temperature has risen excessively. 8. Head <Suspected part> BJ head or control board Temperature Error <Measure> Do not touch the head because it can be too hot. Switch the power off and leave the printer for several minutes.
  • Page 156 Part 5: Maintenance BJC-50 Previous page Check the BJ head temperature sensor resistance. The black BJ cartridge Meter connection and the color BJ Reading cartridge have the same meter Conductivity Pin No. connections and meter No conductivity readings. Figure 5-5 BJ Head Temperature Sensor Correct? Replace the BJ cartridge.
  • Page 157 Part 5: Maintenance BJC-50 <Cause> The BJ cartridge is removed from a position other than the BJ cartridge removal position. 9. No Head Error <Suspected part> BJ cartridge or control board <Measure> Remove the top cover and reinstall the BJ cartridge.
  • Page 158 Part 5: Maintenance BJC-50 <Cause> The recharge current exceeds the standard value. 11. Failed <Suspected part> • Control board. • The contact points between the lithium ion Recharging battery and the printer. Circuit Error <Measure> Remove and reinstall the battery. Is an error displayed? The recharging circuit is defective.

  • Page 159: Paper Feed

    Part 5: Maintenance BJC-50 <Symptom> • Paper cannot be fed. More than one sheet is fed 12. Paper Feed at a time. • Paper is not loaded horizontaly. Paper is not /Delivery output. Error <Cause> The paper end sensor is defective. The paper feed roller does not work correctly.
  • Page 160 Part 5: Maintenance BJC-50 <Cause> This error appears when the carriage is returned to 13. BJ Cartridge the home position without the BJ cartridge installed,or Check Error when presence of BJ cartridge is not recognized though it is installed. <Suspected part> Faulty contact between the BJ cartridge and carriage Faulty BJ cartridge...

  • Page 161: Low Battery

    Part 5: Maintenance BJC-50 <Cause> The manual fed cut sheet is not inserted far enough 16. Failed Manual into the printer for the paper feed roller to grab it. The paper end sensor detects the sheet but it is not Feeding fed into the printer.

  • Page 162: Ink Low

    Part 5: Maintenance BJC-50 The ink low warning is displayed when the ink low warning function 21. Ink Low is enabled in the exclusive printer driver. <Cause> Remaining ink in the ink tank is decreasing. Warning The ink consumption calculated from the numbers of dots, maintenance jets, and cleanings exceeds the maximum ink consumption value, the beeper sounds twice, the POWER indicator lights and the ERROR...
  • Page 163 Part 5: Maintenance BJC-50 b) Symptoms <Symptom> • When the POWER button is pressed, the printer 1. The Power Does does not turn on. • When POWER button is pressed, the printer Not Turn On. does not start initialization. <Cause> The universal adapter, lithium ion battery or control board.

  • Page 164: Control Panel

    Part 5: Maintenance BJC-50 <Symptom> • LED does not light. 2. Control Panel • The buzzer does not sound. Failure Test printing cannot be done. • Operation buttons are ineffective. <Cause> The LED or the beeper is defective. Buttons are defective. Flexible cables are defective.
  • Page 165 Part 5: Maintenance BJC-50 <Symptom> • The installed BJ cartridge is not recognized. 3. BJ Cartridge is • When the BJ cartridge is installed, the carriage Not Recognazed. returns to the replacement position. • The installed BJ cartridge is not recognized correctly.

  • Page 166: Not Print

    Part 5: Maintenance BJC-50 <Symptom> • The printer does not print at all. 4. Print Defect <1> • The printer does not print in the middle. • The printer does not print one or more colors. The Printer Does <Cause> No ink, defective BJ cartridge, Not Print.
  • Page 167 Part 5: Maintenance BJC-50 <Symptom> • The print is blurred. 5. Print Defect <2> • White streaks appear. <Cause> The BJ cartridge, carriage ribbon cable, purge unit, or White Streakes paper feed unit is defective (missing gear teeth). Appear. <Measure> Check the conditions for White Line Sample using the printer and...
  • Page 168 Part 5: Maintenance BJC-50 6. Print Defect <3> Other Print Problems Symptom Check Item Measures • Smeared paper Ink mist on the platen. Use a soft cloth moistened with water to clean. Ink has clogged around the Clean a few times, If the problem head's nozzles.
  • Page 169 Part 5: Maintenance BJC-50 <Symptom> • No printing • An unspecified font is used to print characters. 7. Faulty Interface • Text is printed in an unspecified color. <Cause> The printer driver is set incorrectly. The interface cable is defective. The control board is defective.

  • Page 170: Installation Problems

    Part 5: Maintenance BJC-50 8. Scanner Cartridge: Installation Problems Symptom Check Item Measures No head error Scanner cartridge is installed Press the cartridge button, move message incorrectly. the carriage to the cartridge replacement position and reinstall the cartridge correctly. Restart using the power button. Head mismatch error Scanner cartridge is installed Press the cartridge button, move...

  • Page 171: Connector Position & Pin Alignment

    Part 5: Maintenance BJC-50 6. CONNECTOR POSITION & PIN ALIGNMENT 6.1 Control Board Upper Section CNH1 CNSEN2 CNOP1 CNBT2 CNSEN1 CNIF1 CNCR1 CNFL1 Lower Section CNBT1 CNDC1 CNIR1 Figure 5-10 Control Board CNIF1 (Parallel Interface Connector) Pin No. Signal name IN/OUT Description STROBE...
  • Page 172 Part 5: Maintenance BJC-50 CNH1 (Cartridge Ribbon Cable Connector) Pin No. Signal name IN/OUT Description / (scanner cartridge in use) VHG (LAMPG) GND for head drive voltage VH (GND for scanner drive voltage 24V) VHG (LAMPG) GND for head drive voltage VH (GND for scanner drive voltage 24V) MCH0 (N.C.) Drive signal for temperature control heater (Unused)
  • Page 173 Part 5: Maintenance BJC-50 CNIR1 (IrDA Module Connector) Pin No. Signal name IN/OUT Description MODE IrDA unit type switch signal +5.0V (Vcc1) RXD/PRXD IN/OUT Infrared light transmitting & receiving signal TXD/PTXD IN/OUT Infrared light transmitting & receiving signal +5.0V (Vcc1) 5-33...
  • Page 174 Part 5: Maintenance BJC-50 The BJ cartridge or the scanner cartridge is recognized by the pin No. of connector CNH1 on the control board or by a combination of ID1 and ID0 as shown below. Pin No. Signal name Cartridge type High Black Color, scanner...
  • Page 175 Part 5: Maintenance BJC-50 CNOP1 (Optional ASF and Connector) Pin No. Signal name IN/OUT Description OP-VH Motor drive (24V power supply) OP-Vcc1 Microcomputer drive (5V power supply) RXD0 IN/OUT Serial data receiver TXD0 IN/OUT Serial data transmitter SCLK0 Paper end sensor read signal +5.0V (Vcc3) OP-ON Power on/off drive control signal...

  • Page 176: Carriage Ribbon Cable

    Part 5: Maintenance BJC-50 6.2 Carriage Ribbon Cable 28 29 24 25 26 23 22 21 20 16 17 18 19 14 13 12 11 9 10 Figure 5-11 Carriage Ribbon Cable Pin No. Signal name IN/OUT Description To BJ cartridge See CNH1 GNDH GNDH...

  • Page 177: Bj Cartridge

    Part 5: Maintenance BJC-50 6.3 BJ Cartridge BC-11e V D D EVEN DATA HEAT Spare1 ENB2 (Spare2) HEAT RANK ENB1 O D D ENB0 HEAT HEAT Figure 5-12 BC-11e Contact Pad 6.4 Scanner Cartridge IS-12 LAMP SCLOCK VLAMP DATA LAMP SSYNC CMD3 VLAMP...

  • Page 178: Circuit Diagrams

    Part 5: Maintenance BJC-50 7. CIRCUIT DIAGRAMS 7.1 Parts Layout 7.1.1 Control board (Upper section) 5-38...

  • Page 179: Control Board (Lower Section)

    Part 5: Maintenance BJC-50 7.1.2 Control board (Lower section) 5-39...
  • Page 180 Part 5: Maintenance BJC-50 This page intentionally left blank 5-40...
  • Page 181 BJC-50 Part 5: Maintenance 7.2 Circuit Diagrams CONTROL PCB ASS’Y 01 Vcc1 CNDC1 Vcc1 22K,1/16W,D 180K,1/16W 10K,1/16W 0.1 ,25V 2200 ,25V RESET RESET <02-F1> VSB/RIN 0.1 ,25V 2.2 ,16V 0.1 ,25V 33K,1/16W 100p,50V 2K,1/16W,D 0.1 ,25V Vcc1 R117 0,1/16W 2.2 ,16V R116 10K,1/16W 220,1/4W...
  • Page 182 BJC-50 Part 5: Maintenance CONTROL PCB ASS’Y 02 A <20..1> <03-B1> Vcc1 Vcc1 0.01 ,50V 0.01 ,50V Vcc1 BK1608LM182 HCLK CNH1 HDATA 47K,1/16W BK1608LM182 BENB2 BENB1 <03-F5> ODDENB <03-G1> <03-G1> HCONT MCH0 <03-G5> <05-F5> MCH0 HLAT MCH1 <05-F5> MCH1 BENB3 1000p,50V 1000p,50V HRES...
  • Page 183 BJC-50 Part 5: Maintenance CONTROL PCB ASS’Y 03 A <20..1> <02-A6> D <15..0> <02-G6> MD <15..0> <02-B1> MA <9..0> <02-C1> DRAM(4M) FLASH ROM(4M) FONT ROM(8M) IC10 Vcc1 Vcc1 N.C. N.C. I/O0 I/O15 I/O1 I/O14 /BYTE I/O2 I/O13 I/O3 I/O12 DO15 I/O4 I/O11 DO14...
  • Page 184 BJC-50 Part 5: Maintenance CONTROL PCB ASS’Y 04 Vcc1 Vcc3 Vcc3 1.5K,1/16W 390,1/8W 5.6K,1/16W 1K,1/16W 1K,1/16W 100,1/16W 1K,1/16W BZOUT <02-F4> <02-F3> CNIF1 1000p,50V Vcc1 STROBE IFD0 <02-F5> DATA1 IFD1 <02-F5> DATA2 IFD2 PW-LED 300,1/16W DATA3 <02-F5> <02-F3> IFD3 DATA4 <02-F4> IFD4 <02-F4>...
  • Page 185 BJC-50 Part 5: Maintenance CONTROL PCB ASS’Y 05 Vcc1 Carriage Motor Driver IC12 CNCR1 0.39,1/2W 0.39,1/2W R100 Sen.A 0.39,1/2W 0.39,1/2W 0.1 ,25V 1.6K,1/16W 10K,1/16W R101 CRREF2 1.6K,1/16W 0.1 ,25V <02-A4> VrefA Sen.B 10K,1/16W BCRM CRREF1 <02-A5> VrefB <02-A4> TIMER IC Vcc1 BCRM ACRM...
  • Page 187 The printing paper contains 70% waste paper. PRINTED IN JAPAN (IMPRIME AU JAPON) CANON INC.

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