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...

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...

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...

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,...

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...

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...

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...

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)...

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...

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...