Canon printer PIXMA MX850 User Manual

							
117
Routine Maintenance
z If There Are No Missing Lines and No White Streaks  
(1) Select  All A and press the  OK button.
You do not need to perform Print Head Cleaning. The LCD returns to the  Maintenance 
screen.
z If Lines Are Missing or White Streaks Are Present  
(1) Select  Also B  and press the  OK button.
You need to perform Print Head Cleaning  again. The cleaning confirmation screen is 
displayed.
(2) Use the  { or  } button to select  Ye s, then press the  OK button to start Print Head 
Cleaning.
See “Print Head Cleaning” on page 117.
Print Head Cleaning
Clean the Print Head if lines are missing or if  white streaks appear in the printed nozzle check 
pattern. Cleaning unclogs the nozzle s and restores the print head condition. Note that cleaning the 
Print Head causes used ink to be absorbed in t he ink absorber. Cleaning the Print Head consumes 
ink, so perform Print Head Cleaning only when necessary.
1Make sure that the machine is turned on,  and then load a sheet of A4 or Letter-
sized plain paper in the Rear Tray or Cassette.
2Open the Paper Output Tray, and then open the Output Tray Extension.
(1) Press the Open button to open the Paper Output Tray.
(2) Open the Output Tray Extension.
3Press the  Feed Switch  to select the paper source where you have loaded paper.
4Start Print Head Cleaning.
(1)Press the  Menu button.
(2) Use the  [ or  ] button to select  Maintenance/settings , then press the OK button.
The  Maintenance/settings  screen is displayed.
(3) Use the  [ or  ] button to select  Maintenance, then press the  OK button.
The  Maintenance  screen is displayed.
(4) Use the  { or  }
 button to select  Cleaning, 
then press the  OK button.
The confirmation sc reen is displayed.
Note
Make sure that the Inner Cover is closed. 
						

							
118Routine Maintenance
(5)Use the  { or  } button to select  Ye s, then press the  OK button.
Print Head Cleaning starts.
Do not perform any other operations until Pr int Head Cleaning finishes. This takes about 
1 minute.
The pattern print confirmation screen is displayed.
(6) Use the  { or  }
 button to select  Ye s, then press the  OK button.
The nozzle check pattern is printed.
5Check the print head condition with the printed nozzle check pattern, and take 
appropriate action.
See “Examining the Nozzle Check Pattern” on page 116.
Print Head Deep Cleaning
If print quality does not improve by standard  Print Head Cleaning, try Print Head Deep Cleaning, 
which is a more powerful process. Note that cl eaning the Print Head causes used ink to be absorbed 
in the ink absorber. Print Head Deep Cleaning consumes more ink than standard Print Head 
Cleaning, so perform this procedure only when necessary.
1Make sure that the machine is turned on,  and then load a sheet of A4 or Letter-
sized plain paper in the Rear Tray or Cassette.
2Open the Paper Output Tray, and then open the Output Tray Extension.
(1) Press the Open button to open the Paper Output Tray.
(2) Open the Output Tray Extension.
3Press the  Feed Switch  to select the paper source where you have loaded paper.
4Start Print Head Deep Cleaning.
(1)Press the  Menu button.
(2) Use the  [ or  ] button to select  Maintenance/settings , then press the OK button.
The  Maintenance/settings  screen is displayed.
(3) Use the  [ or  ] button to select  Maintenance, then press the  OK button.
The  Maintenance  screen is displayed.
Note
If the problem is not resolved after performing Print Head Cleaning twice, try Print Head Deep 
Cleaning. See “Print Head Deep Cleaning” on page 118.
Note
Make sure that the Inner Cover is closed. 
						

							
119
Routine Maintenance
(4) Use the  { or  } button to select  Deep 
cleaning , then press the  OK button.
The confirmation sc reen is displayed.
(5) Use the  { or  }
 button to select  Ye s, then press the  OK button.
Print Head Deep Cleaning starts.
Do not perform any other operations until Pr int Head Deep Cleaning finishes. This takes 
about 2 minutes.
The pattern print confirmation screen is displayed.
(6) Use the  { or  } button to select  Ye s, then press the  OK button.
The nozzle check pattern is printed.
5Check the condition of the Print Head.
(1) Check the print head condition with the printed nozzle check pattern.
See “Examining the Nozzle  Check Pattern” on page 116.
If a particular color is not printed properly, replace the ink tank of that color.
See “Replacing an Ink Tank” on page 107.
(2) If the problem is not resolved, turn off the machine and perform another Print Head Deep 
Cleaning after 24 hours.
(3) If this does not solve the problem, the Print Head may be damaged. Contact your Canon 
service representative.
Aligning the Print Head
If ruled lines are printed with misaligned or print re sults are otherwise unsatisfactory, adjust the print 
head position.
„ Automatic Print Head Alignment
1Make sure that the machine is turned on, and then load two sheets of supplied 
paper or A4/Letter-sized Canon Matte Photo Paper MP-101 with the printing side 
(whiter side) facing up in the Rear Tray.
2Open the Paper Output Tray, and then open the Output Tray Extension.
(1) Press the Open button to open the Paper Output Tray.
(2) Open the Output Tray Extension.
NotezMake sure that the Inner Cover is closed.
z The print head alignment pattern is printed in black and blue.
Important
You cannot feed paper from the Cassette when performing Automatic Print Head Alignment. 
Always load paper in the Rear Tray. 
						

							
120Routine Maintenance
3Adjust the print head position.
(1)Press the  Menu button.
(2) Use the  [ or  ] button to select  Maintenance/settings , then press the OK button.
The  Maintenance/settings  screen is displayed.
(3) Use the  [ or  ] button to select  Maintenance, then press the  OK button.
The  Maintenance  screen is displayed.
(4) Use the  { or  } button to select  Auto head 
align , then press the  OK button.
The confirmation sc reen is displayed.
.
(5)Use the  { or  } button to select  Ye s, then press the  OK button.
The print head is aligned automatically, and the  print head pattern after the adjustment is 
printed out. This takes about 10 minutes.
„ Manual Print Head Alignment
If the results of Automatic Print Head Alignment are not satisfactory, follow the procedure below 
to perform Manual Print Head Alignment.
For details on performing Automatic Print He ad Alignment, see “Automatic Print Head 
Alignment” on page 119.
1Make sure that the machine is turned on, an d then load four sheets of A4 or Letter-
sized plain paper in the Rear Tray or Cassette.
2Open the Paper Output Tray, and then open the Output Tray Extension.
(1) Press the Open button to open the Paper Output Tray.
(2) Open the Output Tray Extension.
3Press the  Feed Switch  to select the paper source where you have loaded paper.
4Print the print head alignment pattern.
(1)Press the  Menu button.
(2) Use the  [ or  ] button to select  Maintenance/settings , then press the OK button.
The  Maintenance/settings  screen is displayed.
(3) Use the  [ or  ] button to select  Maintenance, then press the  OK button.
The  Maintenance  screen is displayed.
Note
If you select Head alignment print , the machine 
exits the process after printing the current head 
position adjustment values.
Notez If adjustment was not done successfully, the “ Auto head align has failed.” error message is 
displayed on the LCD. For details, see “An Error Message Is Displayed on the LCD” on 
page 133.
z If results of Automatic Print Head Alignment are not satisfactory, perform Manual Print Head 
Alignment. For details, see “Manual Print Head Alignment” on page 120. 
						

							121 Routine Maintenance
(4)Use the { or } button to select Manual head align, then press the OK button.
The confirmation screen is displayed.
(5)Use the { or }
 button to select Ye s, then press the OK button.
The print head alignment pattern is printed.
(6)When “Did the patterns print correctly?” is 
displayed, confirm that the pattern is printed 
correctly, use the { or } button to select Ye s, 
then press the OK button.
The input screen for the head position 
adjustment values is displayed.
5Look at the first printout, and then adjust the print head position.
(1)Check the printed patterns, and use the [ or 
] button to input the number of the pattern in 
column A that has the least noticeable vertical 
streaks.
Note
If you select Head alignment print, the machine exits the process after printing the current 
head position adjustment values.
Note
If it is difficult to pick the best pattern, pick the setting that produces the least noticeable 
vertical white streaks.
(A) 
Less noticeable vertical white streaks
(B) More noticeable vertical white streaks
(A) (B) 
						

							122Routine Maintenance
(2)Repeat the same procedure until you finish inputting the pattern number for columns B to 
G, then press the OK button.
(3)Confirm the displayed message and press the OK button.
The second pattern is printed.
6Look at the second printout, and then adjust the print head position.
(1)Check the printed patterns, and use the [ or 
] button to input the number of the pattern in 
column H that has the least noticeable vertical 
streaks.
(2)Repeat the same procedure until you finish 
inputting the pattern number for columns I to 
O, then press the OK button.
(3)Confirm the displayed message and press the 
OK button.
The third pattern is printed. 
						

							123 Routine Maintenance
7Look at the third printout, and then adjust the print head position.
(1)Check the printed patterns, and use the [ or 
] button to input the number of the pattern in 
column P that has the least noticeable vertical 
streaks.
(2)Repeat the same procedure until you finish 
inputting the pattern number for columns Q to 
V, then press the OK button.
For columns U and V, the best patterns will be 
smooth and have no streaks in the border 
indicated by the arrows.
(3)Confirm the displayed message and press the OK button.
The fourth pattern is printed.
Note
If it is difficult to pick the best pattern, pick the setting that produces the least noticeable 
horizontal white streaks.
(C) Less noticeable horizontal white streaks
(D) More noticeable horizontal white streaks
(C) (D) 
						

							124Routine Maintenance
8Look at the fourth printout, and then adjust the print head position.
(1)Check the printed patterns, and use the [ or 
] button to input the number of the pattern in 
column a that has the least noticeable 
horizontal streaks.
(2)Repeat the same procedure until you finish inputting the pattern number for columns b to 
k, then press the OK button.
Note
If it is difficult to pick the best pattern, pick the setting that produces the least noticeable 
horizontal white streaks.
(E) Less noticeable horizontal white streaks
(F) More noticeable horizontal white streaks
(E) (F) 
						

							125 Routine Maintenance
Cleaning Your Machine
This section describes the cleaning procedure that is needed to maintain your machine.
„Wiping Off Dirt on the Machine
Be sure to use a soft cloth such as eyeglasses cleaning cloth and wipe off dirt on the surface 
with it gently. Smooth out wrinkles on the cloth if necessary before cleaning.
„Cleaning the Platen Glass and Document Cover
Caution
zDo not use tissue paper, paper towels, or similar materials for cleaning. Paper tissue powders or fine 
threads may remain inside the machine and cause problems such as a blocked Print Head and poor 
printing results. Use a soft cloth to avoid scratching the components. 
zNever use volatile liquids such as thinners, benzene, acetone, or any other chemical cleaner to clean 
the machine, as this may cause a malfunction or damage the machine’s surface.
CautionzBe sure to turn off the power and disconnect the power cord before cleaning the machine.
zThe power cannot be turned off while the machine is sending or receiving a fax, or when there 
are unsent faxes stored in the machine’s memory.
zThe machine cannot receive faxes when the power is turned off.
zIf you disconnect the power cord, all the documents stored in memory are deleted. Send or print 
necessary documents before disconnecting the power cord.
Important
zWhen cleaning the exterior of the machine, do not use tissue paper, rough-textured cloth, or 
similar materials, as this may scratch the surface.
zNever use neutral detergent or volatile liquids such as thinners, benzene, acetone, or any other 
chemical cleaner, as this may damage the surface.
Caution
zBe sure to turn off the power and disconnect the power cord before cleaning the machine.
zThe power cannot be turned off while the machine is sending or receiving a fax, or when there 
are unsent faxes stored in the machine’s memory.
zThe machine cannot receive faxes when the power is turned off.
zIf you disconnect the power cord, all the documents stored in memory are deleted. Send or print 
necessary documents before disconnecting the power cord.
Important
The inner side of the Document Cover (white sheet) (A) is easily damaged, so wipe it gently. 
						

							126Routine Maintenance
With a clean, soft, lint-free cloth, wipe the Platen Glass (B), the inner side of the Document 
Cover (white sheet) (A), the glass of the ADF (C), and the inner side of the ADF (white area) (D) 
gently. Make sure not to leave any residue, especially on the Platen Glass.
„Cleaning the ADF
1Open the Document Tray.
2Open the Document Feeder Cover.
Caution
zBe sure to turn off the power and disconnect the power cord before cleaning the machine.
zThe power cannot be turned off while the machine is sending or receiving a fax, or when there 
are unsent faxes stored in the machine’s memory.
zThe machine cannot receive faxes when the power is turned off.
zIf you disconnect the power cord, all the documents stored in memory are deleted. Send or print 
necessary documents before disconnecting the power cord.
(D)
(C)
(A)
(B)