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Canon MP638, Service Manual

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Canon MP638 Service Manual Download 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. Special Notes on Repair Servicing>

 

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Summary of Contents for MP638

Page 1: ...ypographical 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 chan...

Page 2: ...panel removal 3 Cable wiring and connection 4 Emblem removal 5 Carriage unlocking and ink absorber replacement 6 ASF unit removal 7 Carriage unit removal 8 Spur unit and platen unit removal 9 Purge dr...

Page 3: ...nsor Service Tool 2 Perform in the service mode 5 min Automatic print head alignment At print head replacement At logic board replacement When print quality is not satisfying To secure the dot placeme...

Page 4: ...iameter Service Tool 2 Perform in the service mode and Eject correction is performed at the same time N Carriage rail position adjustment At carriage unit replacement At carriage unit removal To set t...

Page 5: ...onditions Machine buttons Computer MP driver 2 min Ink tank replacement When an ink tank becomes empty No ink error displayed on the monitor or on the machine LCD or short flashing of an ink tank LED...

Page 6: ...e spur holder visible when the scanning unit cover is opened 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...

Page 7: ...e proper position Then press the OK button No paper in the cassette 1003 Cassette There is no paper Load paper and press OK Confirm that the cassette is selected as the paper source Set the paper in t...

Page 8: ...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...

Page 9: ...slit film clean the LF EJ slit film 2 Foreign material or paper debris in the LF drive remove foreign material 3 Cable connection 4 Part replacement LF EJ slit film LF EJ timing sensor unit Paper fee...

Page 10: ...or paper ejection Paper feed cam sensor error 6B10 An error occurred in the paper feed cam sensor during paper feeding from the cassette or the paper absorbing a large amount of ink jammed in the PF...

Page 11: ...t Scanner unit Scanner electric circuit error 5050 The AFE was faulty 1 Cable connection 2 Part replacement Scanner unit 23 times Valve cam sensor error 6C10 The valve cam sensor was faulty at power o...

Page 12: ...to the value before the error Memory card is not set Insert the card after checking the direction The memory card is not inserted in the slot properly Set a memory card properly DPOF information is n...

Page 13: ...t be scanned or is not placed on the platen glass The machine failed in scanning the document for Fit to page copy Press the OK button to clear the error Correct the settings then try the operation ag...

Page 14: ...ressure roller unit Cassette unit Faulty scanning no scanning strange noise 1 Confirm cable connection scanner motor cable and CIS FFC Harness and connector conditions No cable breakage etc 2 Replace...

Page 15: ...Graphic or text is enlarged on printouts in the paper feed direction 1 Confirm that the LF EJ slit film is free from smearing or scratches Cleaning of the LF EJ slit film 2 Replace the following item...

Page 16: ...unter volume print After the ink absorber counter is reset the counter value is printed automatically Carriage unit At replacement 1 Before removal of the carriage rail mark the carriage rail position...

Page 17: ...rive system unit After replacement 1 Confirm the purging operation and the machine operation See 3 4 Verification After Repair for details Service test print Carriage rail and main chassis At replacem...

Page 18: ...LCD operation panel board scanner unit logic board card board IrDA board and PE sensor board 1 External housing scanner unit and document cover removal MP630 MP638 3 REPAIR TABLE OF CONTENTS 1 Remove...

Page 19: ...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...

Page 20: ...5 Remove the main case and sub case 18 45...

Page 21: ...19 45...

Page 22: ...the scanner unit It will make it easier if the cable core is removed first 2 Remove the panel cover Insert a pair of tweezers through into the hole in the bottom of the document pressure plate and pus...

Page 23: ...ve 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...

Page 24: ...e 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 See 3 3 Adjustment Settings 3 Grease applicatio...

Page 25: ...e 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...

Page 26: ...k absorber replacement Push the emblem bottom to remove from the double sided adhesive tape 1 Rotate the drive unit gear toward the back of the machine to unlock the carriage Slide the carriage to the...

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: ...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 le...

Page 29: ...in 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 cauti...

Page 30: ...ensor 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 sp...

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: ...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 S...

Page 33: ...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...

Page 34: ...osition the upper left corner of the document pressure sheet at the scanning reference point on the platen glass back left where the red lines cross in the photo above 2 Slowly close the document pres...

Page 35: ...2 Floil KG107A 18 to 36 1 x 2 3 Carriage rail The surface where the carriage unit slides 3 Floil KG107A 360 to 440 4 Carriage rail The surface where the carriage unit slides 4 Floil KG107A 360 to 440...

Page 36: ...ue replace the ink absorber ink absorber kit When the ink absorber is replaced reset the applicable ink absorber counter to 0 How to check the ink absorber value and the way to set the ink absorber co...

Page 37: ...panel or from the MP driver Maintenance tab Set 1 sheet of A4 Matte Photo Paper MP 101 in the rear tray If automatic alignment is not effective perform manual print head alignment Manual print head al...

Page 38: ...EDs light alternately Alarm in orange and Power in green starting with Alarm LED iv When the Power LED lights in green and the machine displays Service Mode Idle the machine is ready for the service m...

Page 39: ...resetting Not used 9 EEPROM Clear EEPROM initialization The following items are NOT initialized and the shipment arrival flag is not on USB serial number Destination settings Record of ink absorber c...

Page 40: ...the Pattern No in which streaks or lines are the least noticeable for the LF check pattern and the Eject check pattern respectively LF Pattern No 0 to 4 Eject Pattern No 0 to 4 4 In the LF EJECT Corr...

Page 41: ...roll Wheel clockwise step by step The LCD is divided into 16 segments representing each step The color of a segment corresponding to the step changes from red to green If the wheel is rotated counterc...

Page 42: ...otated counterclockwise 1 round 16 steps and all the segments are in blue press the OK button The color pattern is displayed on the LCD If there is any segment that is not in blue when the OK button i...

Page 43: ...sorber 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 From the Counter Valu...

Page 44: ...ication with a connected computer Check point Via USB connection to the computer printing from the computer must be performed properly paper feeding from the rear tray and from the cassette respective...

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: ...one attach the protective cap used when the packing was opened to the print head to protect the print head face from damage due to shocks If the packing material that fixed the carriage from the facto...

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