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MP640 / MP648

Service Manual

Revision 0
QY8-13CN-000
COPYRIGHTc2009 CANON INC. CANON MP640 082009 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 © 2009 by Canon Inc.
CANON INC.
Inkjet Device Market Support Management Div.
451, Tsukagoshi 3-chome, Saiwai-ku, Kawasaki-shi, Kanagawa 212-8530, Japan

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Table of Contents

   Related Manuals for Canon MP640

   Summary of Contents for Canon MP640

  • Page 1: Service Manual

    COPYRIGHTc2009 CANON INC. CANON MP640 082009 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 MP640 / MP648 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. Sensors 1-5. Serial Number Location 2. LIST OF ERROR DISPLAY / TROUBLESHOOTING 2-1.
  • Page 3 4-4. Special Notes on Servicing (1) For smeared printing, uneven printing, or non-ejection of ink (2) Paper feed motor adjustment (3) Carriage unit replacement (4) Document pressure sheet (sponge sheet) replacement (5) Ink absorber counter setting 4-5. Verification After Repair (1) Standard inspection flow (2) Service test print (3) Ink absorber counter value print...
  • Page 4 MP640 / MP648 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 5 position - At scanner unit replacement glass reference mark (back adjustment left). LF / Eject - At logic board replacement To correct line feeding (LF 5 min. Service Tool correction - At paper feed roller roller diameter). Perform in the service replacement mode.
  • Page 6 1-2. Customer Maintenance Approx. Adjustment Timing Purpose Tool time Automatic print - At print head replacement To ensure accurate dot - Machine 5 min. head alignment - When print quality is not satisfying placement. buttons (uneven printing, etc.) - 1 sheet of Matte Photo Paper (MP-101) - Computer (MP...
  • Page 7 1-3. Special Tools Name Tool No. Application Remarks FLOIL KG-107A QY9-0057-000 To the carriage rail sliding portions. In common with the MP610, etc. 1-4. Sensors Sensor Function Possible problems Scanner open sensor Detects opening and closing of the - The carriage does not move to the center even when scanning unit (cover).
  • Page 8 5 / 54...
  • Page 9 6 / 54...
  • Page 10 1-5. 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. When the machine power is ON. <1. MAINTENANCE> 7 / 54...
  • Page 11 MP640 / MP648 TABLE OF CONTENTS 2. LIST OF ERROR DISPLAY / TROUBLESHOOTING 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 12 Press [OK] and error, then perform the automatic - Print head head alignment. repeat operation. <See print head alignment again. - Purge drive system unit manual> (In the MP640 / MP648, use Matte Photo Paper MP-101.) 9 / 54...
  • Page 13 The remaining ink [1683] U130 The remaining level of An ink tank which has once been - Ink tank amount unknown the following ink cannot empty is installed. Replace the - Spur unit (raw ink present). be correctly detected. applicable ink tank with a new one. Replace the ink tank.
  • Page 14 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.
  • Page 15 the service center for reset the ink absorber counter. replacement. Error codes: 5B00: Main ink absorber is full (overseas). 5B01: Main ink absorber is full (Japan). 8 times Print head [5200] The print head temperature (1) Print head condition temperature rise exceeded the specified value.
  • Page 16 encoder error eject encoder signal. clean the LF / EJ slit film. (2) Foreign material or paper debris in the paper path; remove foreign material. (3) Cable connection (4) Part replacement: - LF / EJ slit film - LF / EJ timing sensor unit - Platen unit - Logic board - Paper feed motor...
  • Page 17 - Re-setting of an ink tank Uneven printing. - Whether the ink tank is Canon-genuine one or not Improper color hue. - Whether the ink tank is refilled one or not (2) Remove foreign material from the purge unit caps, if any.
  • Page 18 (3) Perform paper feed roller cleaning. (5) Replace the following item(s): - Pressure roller unit (if smearing is heavy) - Print head (when smearing is caused by the print head) The back side of paper gets (1) Clean the inside of the machine. smeared.
  • Page 19 MP640 / MP648 TABLE OF CONTENTS 3. REPAIR 3-1. Major Replacement Parts Recommended removal Service procedure / Notes on Adjustment / settings Operation check part replacement Logic board (1) Cassette unit After replacement: - EEPROM information print ass'y (2) Left and right side covers 1.
  • Page 20 back). - See 3-2. Part Replacement Procedures, (7) Carriage unit removal, for details. Switch (1) Cassette unit At replacement: - EEPROM information print system unit (2) Left and right side covers 1. Adjust the paper feed motor. - Service test print (3) Document pressure plate unit [See 4-4.
  • Page 21 Carriage rail 3-2. Part Replacement Procedures, - Service test print At replacement: and main and Parts Catalog. 1. Apply grease to the sliding chassis portions. [See 4-3. Grease Application, Idler pulley for details.] parallel pin APP code wheel gear shaft Document (1) Cassette unit - Service test print...
  • Page 22 - Protect the units from soiled with ink. - Protect the housing from scratches. - For the MP640 / MP648 automatic print head alignment, use Matte Photo Paper (MP-101) to ensure alignment accuracy. - Exercise caution with the screws, as follows: i.
  • Page 23 MP640 / MP648 --- 3. REPAIR TABLE OF CONTENTS 3-2. Part Replacement Procedures (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, PE sensor board, and WLAN board.
  • Page 24 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 25 5) Remove the main case and sub-case (no screws). 22 / 54...
  • Page 26 23 / 54...
  • Page 27 (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 28 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.> 5) Remove the panel board (10 screws). 6) When replacing the Easy-Scroll Wheel, always replace the entire wheel with a new one, since grease is already applied to it.
  • Page 29 (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. Pass the ground cable through the hole to hook it on the side of the bottom case. 26 / 54...
  • Page 30 (4) Emblem removal Push the emblem bottom to remove from the double-sided adhesive tape. (5) Carriage unlocking 1) Rotate the APP motor drive gear toward the back of the machine to unlock the carriage. Slide the carriage to the left (the opposite of the home position). 27 / 54...
  • Page 31 (6) ASF unit removal 1) Remove the PE sensor board first, then remove 1 screw from the left plate (the left side of the ASF unit), and 2 screws from the right plate (the right side of the ASF unit). 28 / 54...
  • Page 32 (7) Carriage unit removal 1) 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 it free from any grease or damage. 3) Pass the head of a flat-blade screwdriver through the hole of the main chassis, and press the carriage belt to release it from the pulley.
  • Page 33 4) Remove the carriage cable holder from the front chassis. Remove 3 screws that fix the carriage rail to the main chassis, then slowly put down the carriage rail. 5) Remove the carriage unit. Be cautious that the grease will not attach to any parts. If the carriage unit is not necessary to be replaced, parts under the purge drive system unit, etc.
  • Page 34 (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 35 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. 32 / 54...
  • Page 36 (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.) 2) Remove the springs (left and right) from the pressure roller unit.
  • Page 37 4) Separate the main chassis from the switch system unit and the purge drive system unit. Switch system unit: Purge drive system unit: 34 / 54...
  • Page 38 (10) Engine unit reassembly After repair, reassemble each unit of the printer engine on the bottom case in the procedures listed below. Depending on the replaced unit, some steps can be omitted. For specific part names and locations, refer to the Parts Catalog. 1) Install the switch system unit in the bottom case, and fasten the screws.
  • Page 39 3) Remove a total of 6 screws that fix the switch system unit to the bottom case, and the purge drive system unit to the bottom case. Specific screw location: Photo of the iP4600 (same engine as the MP640 / MP648): 36 / 54...
  • Page 40 4) Slowly lift the print unit to separate it from the bottom case. 5) Remove the paper separation slope, since a portion of the ink absorber lies under it. 6) Replace the ink absorber. Confirm that the replaced new ink absorber completely fits in place and is not lifted or dislocated. 7) While being cautious of the ink tube and each harness location, return the print unit to the bottom case, and fasten the screws (removed in step 2).
  • Page 41 MP640 / MP648 TABLE OF CONTENTS 4. ADJUSTMENT / SETTINGS 4-1. User Mode Function Procedures Remarks Nozzle check Perform via the machine Set a sheet of plain paper (A4 or Letter) in the cassette, or the rear tray pattern printing operation panel, or from the MP if selected.
  • Page 42 4-2. Service Mode (1) 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 43 (2) Service Tool functions Service Tool screen: Version 1.05 Name Function Remarks (1) Test Print Service test print Paper (2 sheets) will feed from the rear tray. Service test print items: - Model name - ROM version - USB serial number - EEPROM information - Process inspection information - Barcode (model name + destination + machine serial number)
  • Page 44 (4) LF / Eject LF / Eject correction pattern Perform LF / Eject correction only when streaks or uneven print printing occurs after the repair. See "LF / Eject Correction" below. (5) Nozzle check Nozzle check pattern print The dialog box opens to select the paper source. Select Rear tray or Cassette, and click OK.
  • Page 45 5 sheets of A4 paper will be used for the pattern printing. - 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, "A function was finished" is displayed on the computer, and the machine returns to be ready for selection of another function.
  • Page 46 (4) Button and LCD test Confirm the operation after replacement of the operation panel 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.
  • Page 47 4-3) Rotate the Easy-Scroll Wheel counterclockwise step by step. The LCD is divided into 6 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 48 (5) 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.
  • Page 49 MP640 / MP648 --- 4. ADJUSTMENT / SETTINGS TABLE OF CONTENTS 4-3. Grease Application Grease Number of Drawing Part name Where to apply grease / oil Grease amount drops x (mg) location Carriage rail The surface where the carriage unit slides...
  • Page 50 47 / 54...
  • Page 51 4-4. Special Notes on Servicing (1) For smeared printing, uneven printing, or non-ejection of ink When smeared printing, uneven printing, or non-ejection of ink occurs, print the nozzle check pattern to determine whether the print head is faulty or not. <...
  • Page 52 (3) Carriage unit replacement To replace the carriage, the carriage rail must be removed from the main chassis (by removing the screws). Before removing the screws, put a mark on the main chassis to indicate the carriage rail position. After replacing the carriage, return the carriage rail to the original position while aligning the rail to the mark on the chassis. (4) Document pressure sheet (sponge sheet) replacement 1) Peel off the cover sheet from the double-sided adhesive tape on the back of the document pressure sheet.
  • Page 53 MP640 / MP648 --- 4. ADJUSTMENT / SETTINGS TABLE OF CONTENTS 4-5. 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 54 (2) Service test print <Service test print sample> - First page: 51 / 54...
  • Page 55 - Second page: 52 / 54...
  • Page 56 (3) Ink absorber counter value print <Print sample> <4-5. Verification After Repair> 53 / 54...
  • Page 57 MP640 / MP648 TABLE OF CONTENTS 5. 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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Mp648

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