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.
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. Operator Call Errors 2-2. Service Call Errors 2-3. Troubleshooting by Symptom 3. REPAIR 3-1. Major Replacement Parts 3-2.
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 5.
MP640 / MP648 TABLE OF CONTENTS 1. MAINTENANCE 1-1. Adjustment, Periodic Maintenance, Periodic Replacement Parts, and Replacement Consumables by Service Engineer (1) Adjustment Adjustment Timing Purpose Tool Approx. time EEPROM initialization - At logic board replacement To initialize settings Service Tool*2 Perform in the service mode. 1 min. Destination settings (EEPROM settings) - At logic board replacement To set destination. Service Tool*2 Perform in the service mode. 1 min.
position adjustment - At scanner unit replacement glass reference mark (back left). LF / Eject correction - At logic board replacement - At paper feed roller replacement To correct line feeding (LF roller diameter). Service Tool*2 Perform in the service mode. - At logic board replacement - At platen unit replacement To correct line feeding (eject roller diameter). Service Tool*2 Perform in the service mode.
1-2. Customer Maintenance Adjustment Automatic print head alignment Timing Purpose Tool Approx. time - At print head replacement - When print quality is not satisfying (uneven printing, etc.) To ensure accurate dot placement. - Machine 5 min. buttons - 1 sheet of Matte Photo Paper (MP-101) - Computer (MP driver) Manual print head - At print head replacement alignment - When print quality is not satisfying (uneven printing, etc.) To ensure accurate dot placement.
1-3. Special Tools Name FLOIL KG-107A Tool No. QY9-0057-000 Application Remarks To the carriage rail sliding portions. In common with the MP610, etc. 1-4. Sensors No. Sensor Function Possible problems 1 Scanner open sensor Detects opening and closing of the scanning unit (cover). - The carriage does not move to the center even when the scanning unit is opened. 2 FB encoder sensor Detects rotation of the scanner motor, and controls scanning operation.
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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.
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. 2. Messages during printing from a computer are displayed on the MP driver Status Monitor. 3.
installed, or not properly installed. installed. Install the print head. Faulty print head ID. Print head temperature sensor error. [1403] Faulty EEPROM data of the print head. [1405] U052 The type of print head is incorrect. Install the correct print head. - Carriage unit Re-set the print head. If the error is not cleared, the print head may be defective. Replace the print head. - Print head - Carriage unit Inner cover error. [1841*2, 1846*2, 1851*1, 1856*1,] --- Inner cover is open.
The remaining ink [1683] amount unknown (raw ink present). U130 The remaining level of the following ink cannot be correctly detected. Replace the ink tank. An ink tank which has once been empty is installed. Replace the applicable ink tank with a new one. Printing with a once-empty ink tank can damage the machine. To continue printing without replacing the ink tank(s), press the Stop button for 5 sec. or longer to disable the function to detect the remaining ink amount.
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.
the service center for replacement. Error codes: 5B00: Main ink absorber is full (overseas). 5B01: Main ink absorber is full (Japan). reset the ink absorber counter. 8 times Print head temperature rise error [5200] The print head temperature (1) Print head condition exceeded the specified value.
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 19 times Ink tank position sensor error [6502] None of the ink tank position (1) Ink tank position; is detected. confirm the ink tank position.
2-3. Troubleshooting by Symptom Symptom Faulty operation Solution The power does not turn on. The power turns off immediately after power-on. (1) Confirm connection of the power supply unit: - Harness and connector conditions (2) Replace the following item(s): - Logic board - Power supply unit - Panel board A strange noise occurs. (1) Examine and remove any foreign material or paper debris.
(3) Perform paper feed roller cleaning. (5) Replace the following item(s): - Pressure roller unit (if smearing is heavy) - Print head*1 (when smearing is caused by the print head) The back side of paper gets smeared. (1) Clean the inside of the machine. (2) Perform bottom plate cleaning. (3) Examine the platen ink absorber. (4) Examine the paper eject roller.
MP640 / MP648 TABLE OF CONTENTS 3. REPAIR 3-1. Major Replacement Parts Recommended removal procedure*1 / Notes on replacement*2 Service part Logic board ass'y (1) (2) (3) (4) (5) (6) (7) Cassette unit Left and right side covers Document pressure plate unit Scanner unit Main case Rear cover Logic board ass'y - Before removal of the logic board ass'y, remove the power cord, and allow for approx. 1 minute (for discharge of capacitor's accumulated charges), to prevent damages to the logic board ass'y.
back). - See 3-2. Part Replacement Procedures, (7) Carriage unit removal, for details. Switch system unit (1) Cassette unit (2) Left and right side covers (3) Document pressure plate unit (4) Scanner unit (5) Main case (6) Rear cover (7) Print unit (8) See 3-2. Part Replacement Procedures. At replacement: 1. Adjust the paper feed motor. [See 4-4. Special Notes on Servicing, (2) Paper feed motor adjustment, for details.
Carriage rail See 3-2. Part Replacement Procedures, and main and Parts Catalog. chassis Idler pulley parallel pin At replacement: 1. Apply grease to the sliding portions. [See 4-3. Grease Application, for details.] - Service test print APP code wheel gear shaft Document pressure sheet Document bottom cover (1) (2) (3) (4) Cassette unit Left and right side covers Document pressure plate unit Scanner unit - Service test print At replacement: 1. Confirm the document pressure plate sheet position.
*1: To reassemble the unit after replacement, follow the procedures in the reverse order. *2: General notes: - Make sure that the flexible cables and wires in the harness are in the proper position and connected correctly. See 32. Part Replacement Procedures or the Parts Catalog for details. - Do not drop the ferrite core, which may cause damage. - Protect electrical parts from damage due to static electricity. - Before removing a unit, after removing the power cord, allow the machine to sit for approx.
MP640 / MP648 --- 3. REPAIR 3-2. Part Replacement Procedures TABLE OF CONTENTS (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. Some of the photos are of the iP4600, iP4700, and MP630, since their structures are same. (1) External housing, scanner unit, and document cover removal 1) Remove the cassette.
3) Remove the scanner cable, panel cable, FB encoder cable, and core. 4) Remove the side cover L, scanner unit, then document pressure plate unit (2 screws).
5) Remove the main case and sub-case (no screws).
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(2) Operation panel removal 1) Separate the document pressure plate from the scanner unit. 2) Remove the panel cover.
4) Remove the operation panel unit from the base (4 screws). 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.
(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.
(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).
(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).
(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. Be cautious to keep it free from any grease.
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. can be replaced without removing the carriage rail.
(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.
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.
(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. 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.
(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. 2) Attach the duplex print paper feed roller unit to the purge drive system unit, and fix them to the bottom case with the screws. 3) Attach the cassette feed guide.
(11) Ink absorber replacement If the ink absorber alone needs to be replaced (because the ink absorber becomes full, etc.) and no other engine parts are replaced, the ink absorber can be replaced only by separating the print unit from the bottom case. It is not necessary to disassemble the whole engine unit. 1) Disconnect the DC harness from the logic board (right side of the machine). 2) Disconnect the ground cable from the front chassis (left side of the machine).
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).
MP640 / MP648 TABLE OF CONTENTS 4. ADJUSTMENT / SETTINGS 4-1. User Mode Function Nozzle check pattern printing Procedures Perform via the machine operation panel, or from the MP driver Maintenance tab. Remarks Set a sheet of plain paper (A4 or Letter) in the cassette, or the rear tray if selected. Print head - Cleaning both Black and Color: manual cleaning Perform via the machine operation panel. - Cleaning Black or Color separately, or both Black and Color: Perform from the MP driver Maintenance tab.
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. When the Power LED lights in green, while holding the ON button, release the Stop button. (DO NOT release the ON button.) iii.
(2) Service Tool functions Service Tool screen: Version 1.05 No. Name (1) Test Print Function Service test print Remarks Paper (2 sheets) will feed from the rear tray.
(4) LF / Eject LF / Eject correction pattern print Perform LF / Eject correction only when streaks or uneven 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. (6) Integration Successive print of (1) service test pattern, (2) EEPROM information, and (5) nozzle check pattern Paper will feed from the rear tray.
(3) LF / Eject correction After replacement of the feed roller, platen unit, LF / Eject encoder, carriage encoder film, or logic board in repair servicing or in refurbishment operation, perform the adjustment to maintain the optimal print image quality. If the print quality is considered unaffected by replacement of those parts, it is not necessary to perform LF / Eject correction. 1) Print the LF / Eject correction pattern.
(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. 2) Press each button of the operation panel, to see if every button functions properly. 3) The LCD is divided into 16 segments, representing each button. The color of a segment corresponding to the pressed button changes to red.
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.
(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. In the Ink Absorber Counter section of the Service Tool, select Main from the Absorber pull-down menu.
MP640 / MP648 --- 4. ADJUSTMENT / SETTINGS TABLE OF CONTENTS 4-3. Grease Application No Part name Where to apply grease / oil Drawing No.
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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. < Procedures > 0) Using the tool print head, confirm that the test printer (to be used to examine the print head in question) operates properly, then install the print head in question in that test printer.
(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.
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 - The information must be printed properly. See 3-1. Major Replacement Parts.
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(3) Ink absorber counter value print <4-5.
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. 2) Keep the print head and ink tanks installed in the carriage. See Caution 1 below. 3) Turn off the machine by pressing the ON button to securely lock the carriage in the home position.
