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Canon PIXMA MX870 Service Manual
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Canon PIXMA MX870 Service Manual

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PIXMA MX870
SERVICE
MANUAL
Canon
Copyright
2010, Canon U.S.A. This technical publication is the proprietary and confidential information of Canon U.S.A. which
©
shall be retained for reference purposes by Authorized Service Facilities of Canon U.S.A. Its unauthorized use is prohibited.

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  • Page 1 PIXMA MX870 SERVICE MANUAL Canon Copyright 2010, Canon U.S.A. This technical publication is the proprietary and confidential information of Canon U.S.A. which © shall be retained for reference purposes by Authorized Service Facilities of Canon U.S.A. Its unauthorized use is prohibited.
  • Page 2 MX870 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.
  • Page 3 4-4. Grease Application 4-5. 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 (6) Ink absorber life estimation (7) Power supply unit and modular board replacement (8) Rating label on the bottom case (except China) (9) PTT label on the bottom case (for New Zealand only)
  • Page 4 MX870 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. Service Tool initialization Perform in the service mode.
  • Page 5 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. correction and Eject correction - At logic board replacement To correct line feeding (eject Service Tool - At platen unit replacement...
  • Page 6 1-2. Customer Maintenance Approx. Adjustment Timing Purpose Tool time Automatic - At print head replacement To ensure accurate dot - Machine buttons 6 min. print head - When print quality is not satisfying placement. - Computer (MP driver) alignment (uneven printing, etc.) Manual print - At print head replacement To ensure accurate dot...
  • 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 DES sensor Detects paper ejection from the ADF. - Paper jam in the ADF DS sensor Detects paper feeding from the ADF.
  • Page 8 5 / 63...
  • Page 9 6 / 63...
  • 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 / 63...
  • Page 11 MX870 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 error. Faulty EEPROM [1405] data of the print head. Multiple ink tanks [1487] U071 More than one ink Replace the wrong ink tank(s) with the correct - Ink tank of the same color tank of the one(s). - Logic board installed.
  • Page 13 ink tank. Printing with an empty ink tank can damage - Logic board (Applicable ink the machine. tank icon) 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.
  • 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. Cycles blinking Error...
  • Page 15 full Message on the LCD: - Ink absorber kit and double-sided adhesive tape Ink absorber full. Service (3) Ink absorber counter value in the EEPROM; required. reset the ink absorber counter. Error codes: 5B00: Main ink absorber is full (overseas). 5B01: Main ink absorber is full (Japan).
  • Page 16 sensor error be detected. (2) Part replacement: - Purge drive system unit 17 times Paper eject [6010] An error occurred in the paper (1) Smearing or scratches on the LF / EJ slit film; encoder eject encoder signal. clean the LF / EJ slit film. error (2) Foreign material or paper debris in the paper path;...
  • Page 17 2-3. FAX Errors For errors other than those listed below, please refer to the "G3 / G4 Facsimile Error Code List (Rev. 2." (HY8-22A6-020 in English). (1) User error codes Solution Error code TX / RX Meaning (Parts that are likely to be faulty) #001 Document jam - DF unit...
  • Page 18 ##111 TX / RX Memory error - Eliminate all the data, and register them again. ##114 RTN has been received. - Increase the transmission level of the sending machine. ##200 A carrier has not been detected for 5 seconds during image - Increase the transmission level of reception.
  • Page 19 machine. ##671 In V.8 call reception, the procedure fails to proceed to phase 2 - In bit 0 of the service data #1 after CM detection, causing T1 time-over. SSSW SW28, prohibit the V.8 / V.34 procedure of the sending machine.
  • Page 20 ##763 After transmitting PPS-EOM in ECM transmission, re- - Increase the period of time of the transmission of the procedure signal has been attempted the T5 time-over. number of specified times but failed, or T5 time-over (60 sec.) has occurred. ##764 After transmitting PPS-EOM in ECM transmission, re- - Try a higher transmission level.
  • Page 21 has occurred. ##784 After transmitting EOR-EOM in ECM transmission, ERR has - Try a higher transmission level. been received. ##785 After transmitting EOR-EOP in ECM transmission, no - Try a higher transmission level. significant signal has been received, and re-transmission of the - Increase the transmission level of procedure signal has been attempted the number of specified the receiving machine.
  • Page 22 Uneven printing. tank Improper color hue. - Re-setting of an ink tank - Whether the ink tank is Canon-genuine one or not - Whether the ink tank is refilled one or not (2) Remove foreign material from the purge unit caps, if any.
  • Page 23 - Logic board - Purge drive system unit Paper gets smeared. (1) Clean the inside of the machine. (2) Perform bottom plate cleaning. (3) Perform paper feed roller cleaning. (4) Replace the following item(s): - Pressure roller unit (if smearing is heavy) - Print head (when smearing is caused by the print head)
  • Page 24 MX870 TABLE OF CONTENTS 3. REPAIR 3-1. Major Replacement Parts (and Notes on Disassembling / Reassembling) Est. Service time Recommended removal procedure Operation Adjustment / settings part required check Notes on replacement (min.) Logic (1) Cassette unit After replacement: - EEPROM board (2) Left and right side covers 1.
  • Page 25 Paper (4) Scanner unit (2) Paper feed motor adjustment, for - Service test feed (5) Main case details.] print motor (6) Rear cover (7) Print unit (8) See 3-2. Part Replacement Procedures. - The screws securing the paper feed motor are allowed to be loosened only for paper feed motor replacement.
  • Page 26 wheel gear shaft Document (1) Cassette unit - Service test At replacement: pressure (2) Left and right side covers 1. Confirm the document pressure plate print sheet (3) Document pressure plate unit sheet position. [See 4-5. Special Notes (4) Scanner unit on Servicing, (4) Document pressure Document sheet...
  • Page 27 MX870 --- 3. REPAIR TABLE OF CONTENTS 3-2. Part Replacement Procedures 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, WLAN board, modular board, and PE sensor board. Some of the photos below are for the MX860, since its structure is similar to that of the MX870.
  • Page 28 4) Remove the scanner cable, LCD cable, document feeder harness, panel ground harness, and core. (1 screw) <The core fits to the main case rib.> 25 / 63...
  • Page 29 5) Remove the side cover L, disengage the scanner support, then separate the scanner from the printer. (4 screws) 26 / 63...
  • Page 30 6) Separate the scanner from the document feeder. (no screws) 7) Remove the emblem. <Using a pair of tweezers, etc., push the emblem on the document feed cover side. The double-sided adhesive tape on the back of the emblem will remove, making the emblem free.> 27 / 63...
  • Page 31 8) Remove the main case. (no screws) 28 / 63...
  • Page 32 (2) Operation panel and document feed unit removal 1) Remove the feed tray, panel cover, right cover, and rear cover. (no screws) <Be cautious not to damage the tabs and hooks.> 29 / 63...
  • Page 33 2) Remove the document feed cover. 3) Remove the operation panel, eject tray, document feed switch, and document feed unit. (19 screws) <The core fits to the document feed base rib.> 30 / 63...
  • Page 34 31 / 63...
  • Page 35 4) Remove the LCD ass'y. (no screws) 5) Remove the panel board (11 screws). 32 / 63...
  • Page 36 (3) Printer unit removal, and ink absorber replacement 1) Separate the PictBridge chassis from the main PCB chassis. (1 screw) 2) Separate the main PCB chassis from the bottom case. (1 screw) 3) Separate the PCI DC and GND harnesses from the printer unit. (1 screw) <The GND harness fits to the bottom case rib.>...
  • Page 37 4) Remove the speaker. (2 screws) 5) Remove the printer unit. (6 screws) <While being cautious not to damage the arm that connects to the front door, lift the printer unit.> When the paper separation slope is removed as well as the printer unit from the bottom case, ink absorbers can be replaced.
  • Page 38 (4) Board removal 1) Remove the WLAN board, card board, main PCB, modular board, and main PCB chassis. (15 screws) <The core fits to the rib of the harness guide.> 35 / 63...
  • Page 39 2) Remove the PE sensor board. (5 screws) 36 / 63...
  • Page 40 (5) Carriage unlocking 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). (6) ASF unit removal 1) Remove 1 screw from the left plate, and 2 screws from the right plate. 37 / 63...
  • Page 41 (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) Using a pair of pliers, etc., release the left end of the pulley holder spring, then remove the carriage belt.
  • Page 42 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. 39 / 63...
  • Page 43 (8) Spur unit and platen unit removal 1) Remove the ink sensor and the middle front cover 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 44 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. 41 / 63...
  • Page 45 (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.) 42 / 63...
  • Page 46 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. 43 / 63...
  • Page 47 (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 48 MX870 TABLE OF CONTENTS 4. ADJUSTMENT / SETTINGS 4-1. User Mode Function Procedures Remarks Nozzle check Perform via the machine operation panel, or Set a sheet of plain paper (A4 or Letter) in the cassette, or the pattern from the MP driver Maintenance tab. rear tray if selected.
  • Page 49 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 50 (2) Service Tool functions Service Tool screen: Version 1.072 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...
  • Page 51 - Error information, etc. Not used. (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.
  • Page 52 5 sheets of 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, the machine returns to be ready for selection of another function ("Service Mode Idle" is displayed on the LCD).
  • Page 53 (4) Button and LCD test Confirm the operation after replacement of the panel board or LCD unit. 1) Check to see if the LCD turns off properly 1-1) Click Panel Check of the Service Tool on the connected computer. All the LED's on the machine turn on and the LCD turns blue, waiting for a button to be pressed.
  • Page 54 3) Transparent pattern display check 3-1) Press the OK button. "OK1" in white is displayed on the black background. If the result is not good, "NG1" in black is displayed on the white background (transparent color) immediately after "OK1." 3-2) Press the OK button. "OK2" in black is displayed on the white background. If the result is not good, "NG2" in white is displayed on the black background (transparent color) immediately after "OK2."...
  • Page 55 MX870 --- 4. ADJUSTMENT / SETTINGS TABLE OF CONTENTS 4-3. PTT Parameter Mode Enter the PTT parameter mode in the user mode as below. (The PTT parameter mode cannot be entered in the service mode.) 1) In the user mode, press the SCAN button to enter the scan mode. 2-a) Press #, 9, 7, 6, 9, # to enter the PTT parameter mode.
  • Page 56 <#1 BIT SWITCH> 1. In the #1 BIT SWITCH menu, the following screen is displayed: PTT PRAMETER #1 BIT SWITCH SW#01 00000000 2. Each time the up or down cursor button (or the OK button) is pressed, the SW# changes from 01 to 20. Be cautious not to select the SW numbers which are not used in servicing.
  • Page 57 <Confirmation of the setting values> Print and confirm the PTT parameter setting values in the following procedures: 1) In the user mode, press the SCAN button, then press #, 9, 7, 6, 8, #. 2) The PTT parameter mode values are printed. For the definition and description of each bit of the SW#, refer to the "G3 Facsimile Service Data Service Handbook."...
  • Page 58 MX870 --- 4. ADJUSTMENT / SETTINGS TABLE OF CONTENTS 4-4. Grease Application Grease Number of Drawing Part name Where to apply grease / oil Grease amount drops x (mg) Location 1 Carriage rail The surface where the carriage unit slides Floil KG107A 230 to 290 2 Carriage rail...
  • Page 59 4-5. 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 60 (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 61 (6) Ink absorber life estimation For your reference in servicing, the estimated number of months until the ink absorber will become full is given in EEPROM information print. Sample: DF = 00049 (It indicates that there will be 49 months before the ink absorber becomes full.) Note 1: In the following cases, estimatino of the ink absorber life will not be properly given: - The printer is not connected to a computer.
  • Page 62 (8) Rating label on the bottom case (except China*) When the bottom case is replaced, be sure to remove the rating label from the original bottom case and attach it to the replaced new one. The rating label is given to each printer unit respectively, thus the label of one unit is valid only for that unit. For this reason, the label is not available as a service part.
  • Page 63 MX870 --- 4. ADJUSTMENT / SETTINGS TABLE OF CONTENTS 4-6. 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> - The information must be printed properly.
  • Page 64 (2) Service test print <Service test print sample (unified inspection pattern print)> 61 / 63...
  • Page 65 (3) Ink absorber counter value print <Print sample> <4-6. Verification After Repair> 62 / 63...
  • Page 66 MX870 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.

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