Canon MP638 Service Manual
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Canon MP638 Service Manual

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MP630 / MP638
Service Manual
Revision 0
QY8-13CB-000
COPYRIGHTc2008 CANON INC. CANON MP630 072008 XX 0.00-0
Scope
This manual has been issued by Canon Inc., to provide the service technicians of this product with the information necessary for
qualified persons to learn technical theory, installation, maintenance, and repair of products. The manual covers information
applicable in all regions where the product is sold. For this reason, it may contain information that is not applicable to your
region.
This manual does not provide sufficient information for disassembly and reassembly procedures.
Refer to the graphics in the separate Parts Catalog.
Revision
This manual could include technical inaccuracies or typographical errors due to improvements or changes made to the product.
When changes are made to the contents of the manual, Canon will release technical information when necessary. When
substantial changes are made to the contents of the manual, Canon will issue a revised edition.
The following do not apply if they do not conform to the laws and regulations of the region where the manual or product is used:
Trademarks
Product and brand names appearing in this manual are registered trademarks or trademarks of the respective holders.
Copyright
All rights reserved. No parts of this manual may be reproduced in any form or by any means or translated into another language
without the written permission of Canon Inc., except in the case of internal business use.
Copyright © 2008 by Canon Inc.
CANON INC.
Inkjet Device Quality Assurance Div. 2
451, Tsukagoshi 3-chome, Saiwai-ku, Kawasaki-shi, Kanagawa 212-8530, Japan

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  • Page 1 COPYRIGHTc2008 CANON INC. CANON MP630 072008 XX 0.00-0 Scope This manual has been issued by Canon Inc., to provide the service technicians of this product with the information necessary for qualified persons to learn technical theory, installation, maintenance, and repair of products. The manual covers information applicable in all regions where the product is sold.

  • Page 2: Table Of Contents

    MP630 / MP638 TABLE OF CONTENTS 1. MAINTENANCE 1-1. Adjustment, Periodic Maintenance, Periodic Replacement Parts, and Replacement Consumables by Service Engineer 1-2. Customer Maintenance 1-3. Special Tools 1-4. Serial Number Location 2. LIST OF ERROR DISPLAY / INDICATION 2-1. Operator Call Errors 2-2.

  • Page 3: Maintenance

    MP630 / MP638 TABLE OF CONTENTS 1. MAINTENANCE 1-1. Adjustment, Periodic Maintenance, Periodic Replacement Parts, and Replacement Consumables by Service Engineer (1) Adjustment Approx. Adjustment Timing Purpose Tool time EEPROM - At logic board replacement To initialize settings 1 min.
  • Page 4 - At logic board replacement To correct line feeding (eject and Eject Service Tool - At platen unit replacement roller diameter). Perform in the service correction is mode. performed at the same time.) Carriage rail - At carriage unit replacement To set the carriage rail to the None.

  • Page 5: Customer Maintenance

    1-2. Customer Maintenance Approx. Adjustment Timing Purpose Tool time Automatic print - At print head replacement To ensure accurate dot - Machine 7 min. (Use head alignment - When print quality is not satisfying (uneven placement. buttons MP-101.) printing, etc.) - Matte Photo Paper (MP- 101)

  • Page 6: Special Tools

    1-3. Special Tools Name Tool No. Application Remarks FLOIL KG-107A QY9-0057-000 To the carriage rail sliding portions, and Easy-Scroll Wheel base. In common with the MP610, etc. 1-4. Serial Number Location On the inner guide over the upper portion of the spur holder (visible when the scanning unit (cover) is opened) When the machine power is OFF.

  • Page 7: List Of Error Display / Indication

    MP630 / MP638 TABLE OF CONTENTS 2. LIST OF ERROR DISPLAY / INDICATION Errors and warnings are displayed by the following ways: 1. Operator call errors are indicated by the Alarm LED lit in orange, and the error and its solution are displayed on the LCD in text and by icon.
  • Page 8 <See manual> (In the MP630 / MP638, use Matte Photo Paper MP-101.) The remaining ink amount [1683] U130 (Applicable ink tank icon) An ink tank which has once been empty is installed.

  • Page 9: Service Call Errors

    2-2. Service Call Errors (by Cyclic Blinking of Alarm and Power LEDs) Service call errors are indicated by the number of cycles the Alarm and Power LEDs blink, and the corresponding error code with the message, "Printer error has occurred. Turn off power then back on again. If problem persists, see the manual." is displayed on the LCD. Cycles of blinking of Error...
  • Page 10 (Japan). 8 times Print head [5200] The print head temperature exceeded (1) Print head condition temperature rise the specified value. (2) Cable connection error (3) Part replacement: - Print head - Logic board 9 times EEPROM error [6800, A problem occurred in reading from (1) Part replacement: 6B01] or writing to the EEPROM.
  • Page 11 - Spur unit - Logic board 20 times Other errors [6500] An unidentified error occurred. (1) Part replacement: - Logic board 21 times Drive switch error [C000] Drive was not switched properly. (1) Foreign material or paper debris in the drive switch area;...

  • Page 12: Other Error Messages

    2-3. Other Error Messages Message on the LCD Cause Solution The selected paper cannot be fed from The paper type being used is not supported for Change the paper source to the rear tray. cassette. Change the paper source and paper feeding from the cassette.

  • Page 13: Warnings

    attempted from the menu. then perform Card Direct printing. The paper size is not correct. Check the Non-supported size of paper for Camera Direct Cancel printing on the digital camera. Confirm page size you have set. printing via PictBridge connection is selected. the paper size, and print again.

  • Page 14: Troubleshooting By Symptom

    2-5. Troubleshooting by Symptom Symptom Solution Faulty operation The power does not turn on. (1) Confirm connection of the power supply unit: The power turns off immediately after - Harness and connector conditions power-on. (2) Replace the following item(s): - Logic board - Power supply unit - Panel board A strange noise occurs.
  • Page 15 - The part in the paper path causing the smearing Graphic or text is enlarged on printouts in (1) Confirm that the carriage slit film is free from smearing or the carriage movement direction. scratches: - Cleaning of the timing slit film. (2) Replace the following item(s): - Timing slit film - Carriage unit...

  • Page 16: Repair

    MP630 / MP638 TABLE OF CONTENTS 3. REPAIR 3-1. Notes on Service Part Replacement (and Disassembling / Reassembling) Service part Adjustment / settings Operation check Notes on replacement Logic board ass'y - Before removal of the logic board After replacement:...
  • Page 17 - Protect the units from soiled with ink. - Protect the housing from scratches. - For the MP630 / MP638 automatic print head alignment, use Matte Photo Paper (MP-101) to ensure alignment accuracy. - Exercise caution with the screws, as follows: i.
  • Page 18 MP630 / MP638 --- 3. REPAIR TABLE OF CONTENTS 3-2. Special Notes on Repair Servicing (Click on the image to enlarge it.) Be sure to protect the machine from static electricity in repair servicing, especially for the LCD, operation panel board, scanner unit, logic board, card board, IrDA board, and PE sensor board.
  • Page 19 3) Remove the scanner cable, panel cable, FB encoder cable, and core. <The core is fixed on the rib of the sub-case (back of the main case).> 4) Remove the side cover L, scanner unit, then document pressure plate unit (2 screws). <While holding the scanner unit, remove the side cover L, then disengage the scanner unit from the scanner support arm.>...
  • Page 20 5) Remove the main case and sub-case. 18 / 45...
  • Page 21 19 / 45...
  • Page 22 (2) Operation panel removal 1) Separate the document pressure plate from the scanner unit. <While pushing the hinge edge inward, pull the plate upward to separate it from the scanner unit.> <Remove the panel cable from the scanner unit. It will make it easier if the cable core is removed first.> 2) Remove the panel cover.
  • Page 23 4) Remove the operation panel unit from the base (4 screws). <For the hinge cable core position and cable layout, see the photos below. Use the longnose pliers in disengaging the hinge and in releasing the spring.> 21 / 45...
  • Page 24 5) Remove the panel board (10 screws). 6) Remove the Easy-Scroll Wheel from the panel board. <Be cautious not to touch the grease between the wheel base and the wheel.> 3-3. Adjustment / Settings, (3) Grease application. 22 / 45...
  • Page 25 (3) Cable wiring and connection 1) Wiring on the right side 2) Wiring of the ink sensor cable and the inner cover open sensor cable 3) Wiring on the left side. Hook the ground cable on the side of the bottom case. 23 / 45...
  • Page 26 (4) Emblem removal Push the emblem bottom to remove from the double-sided adhesive tape. (5) Carriage unlocking, and ink absorber replacement 1) Rotate the drive unit gear toward the back of the machine to unlock the carriage. Slide the carriage to the left (the opposite of the home position). 24 / 45...
  • Page 27 (6) ASF unit removal 1) Remove 1 screw from the left plate, and 2 screws from the right plate. 25 / 45...
  • Page 28 (7) Carriage unit removal 1) At first, on the main chassis, mark the positions of the screws that fix the carriage rail to the main chassis (3 points for each screw: the left, right, and center). 2) Remove the timing slit film. Be cautious to keep the film free from any grease or scratches. 3) Using a longnose pliers, release the left end of the pulley holder spring, and remove the carriage belt.
  • Page 29 4) Remove 3 screws that fix the carriage rail to the main chassis. Before removing the center screw, remove the carriage cable holder from the front chassis. After the 3 screws are removed, slowly put down the carriage rail. 5) Remove the carriage unit. Be cautious that the grease will not attach to any parts. 27 / 45...
  • Page 30 (8) Spur unit and platen unit removal 1) Remove the ink sensor and the inner cover sensor from the front chassis (1 screw each). 2) From the left and right sides of the spur unit, release the springs (2 on the left side, 1 on the right side). Then, slowly pull the spur unit upward to remove it from the platen unit.
  • Page 31 3) Remove the front chassis (3 screws). 4) Unlock the paper eject roller gear. While raising the front of the platen unit, remove the platen unit from the printer unit. 29 / 45...
  • Page 32 (9) Purge drive system unit (right plate) and switch system unit (left plate) removal 1) Release the springs of the carriage motor cable, duplex printing paper feed roller, cassette feed roller, cassette feed guide, and paper guide unit (both sides). (See the Parts Catalog for details.) 30 / 45...
  • Page 33 2) Remove the pressure roller springs (both the left and the right ones). 3) Remove the screws that fix the units to the main chassis (2 on the right, 3 on the left). 4) Separate the main chassis from the switch system unit and the purge drive system unit. <3-2.
  • Page 34 MP630 / MP638 --- 3. REPAIR TABLE OF CONTENTS 3-3. Adjustment / Settings (1) Paper feed motor adjustment 1) When attaching the motor, fasten the screws so that the belt is properly stretched (in the direction indicated by the blue arrow in the photo below).
  • Page 35 (3) Grease application 1) Printer unit Grease Number of Drawing Part name Where to apply grease / oil Grease amount drops x (mg) locations 1 Carriage rail The surface where the carriage unit slides Floil KG107A 270 to 330 2 Carriage rail The surface where the carriage unit slides Floil KG107A 18 to 36...
  • Page 36 2) Operation panel / Easy-Scroll Wheel Grease Number of Drawing Part name Where to apply grease / oil Grease amount drops x (mg) locations Easy-Scroll Wheel Easy-Scroll Wheel sliding portions Floil KG107A 9 to 18 base 1 drop = 9 to 18 mg (4) Ink absorber counter setting Before replacement of the logic board, check the ink absorber counter value, and register it to the replaced new logic board.
  • Page 37 MP630 / MP638 --- 3. REPAIR TABLE OF CONTENTS (5) User mode Function Procedures Remarks Nozzle check pattern printing Perform via the machine operation panel, or from the Set a sheet of plain paper (A4 or Letter) in MP driver Maintenance tab.
  • Page 38 (6) Service mode <Service mode operation procedures> Use the Service Tool on the connected computer. 1) Start the machine in the service mode. i. With the machine power turned off, while pressing the Stop button, press and hold the ON button. (DO NOT release the buttons.) ii.
  • Page 39 Name Function Remarks (1) Test Print Service test print Paper will feed from the rear tray. Service test print: - Model name - ROM version - Ink absorber counter value (ink amount in the ink absorber) - USB serial number - Destination - EEPROM information - Process inspection information...
  • Page 40 - Paper source: Select either Rear tray or Cassette. - Media type: Select one from HR-101, GF-500/Office Planner, HP Bright White, and Canon Extra/STEINBEIS. 2) When printing is finished, the machine returns to be ready for selection of another function ("Service Mode Idle" is displayed on the LCD).
  • Page 41 <Button and LCD test> Confirm the operation after replacement of the operation panel unit, board, or LCD unit. 1) Click Panel Check of the Service Tool on the connected computer. The machine LCD turns blue, waiting for a button to be pressed. 2) Press each button of the operation panel.
  • Page 42 4-3) Rotate the Easy-Scroll Wheel counterclockwise step by step. The LCD is divided into 16 segments, representing each step. The color of a segment corresponding to the step changes from green to blue. If the wheel is rotated clockwise before counterclockwise round completes, the color of segment(s) corresponding to the number of steps the wheel is rotated clockwise returns to green.
  • Page 43 <Ink absorber counter setting> Set the ink absorber counter value to a new EEPROM after the logic board is replaced in servicing. 1) Before replacement of the logic board, check the ink absorber counter value in EEPROM information print. 2) After replacement of the logic board, the ink absorber counter value should be set in the service mode using the Service Tool. In the Ink Absorber Counter section of the Service Tool, select Main from the Absorber pull-down menu.
  • Page 44 MP630 / MP638 --- 3. REPAIR TABLE OF CONTENTS 3-4. Verification After Repair (1) Standard inspection flow In each step below, confirm that printing is performed properly and the machine operates properly without any strange noise. EEPROM information print <Check point>...
  • Page 45 (2) Service test print <Service test print sample> 43 / 45...
  • Page 46 (3) Ink absorber counter value print <Print sample> <3-4. Verification Items> 44 / 45...
  • Page 47 MP630 / MP638 TABLE OF CONTENTS 4. MACHINE TRANSPORTATION This section describes the procedures for transporting the machine for returning after repair, etc. 1) In the service mode, press the ON button to finish the mode, and confirm that the paper lifting plate of the rear tray is raised.

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