Canon printer PIXMA MX850 User Manual

107
Routine Maintenance
Routine Maintenance
Replacing an Ink Tank
This section explains the way to confirm the in k status and the procedure to replace ink tanks.
When ink runs out or other errors occur, an error  message is displayed on the LCD to inform you of 
the error. See “An Error Message Is Displayed  on the LCD” on page 133 and confirm how to handle 
it.
When printing from your computer, error mess ages appear on your computer screen as well.
„Getting the Ink Status Information
You can confirm...

108Routine Maintenance
zWith the Ink Lamps
You can confirm the status of each ink tank by  the ink lamps. Open the Scanning Unit (Printer 
Cover) of the machine to confirm how the ink lamps light or flash.
z Ink lamp is on  
The ink tank is correctly set and there is enough ink remaining to print.
z Ink lamp is flashing  
Flashing slowly (at around 3-second intervals) ......Repeats
Ink is low. You can continue printing for a while, but we recommend you to have a new ink 
tank available.
Flashing quickly...

109 Routine Maintenance
„Replacing Ink Tanks
When ink tanks run out of ink, replace them using the following steps.
1Open the Scanning Unit (Printer Cover) and 
the Paper Output Tray.
(1)Make sure the machine is turned on.
(2)Lift the Scanning Unit (Printer Cover) until it 
stops.
The Paper Output Tray will open automatically 
and the Print Head Holder moves to the center.
2Open the Inner Cover.
Important
Handling Ink
zTo maintain optimal printing quality, we recommend the use of specified Canon brand...

110Routine Maintenance
3Remove the ink tank whose lamp is flashing fast.
(1)Push the tab and remove the ink tank.
4Prepare the replacement tank.
(1)Remove the new ink tank from its packaging.
(2) Pull the orange tape (C) in the direction of the 
arrow to peel off the protective film.
(3) Remove the film (D) completely.
(4) Remove the orange protective cap from the 
bottom of the ink tank.
Discard the cap once it is removed.
Important
zHandle ink tanks carefully to avoid staining 
clothing or the...

111 Routine Maintenance
5Install the ink tank.
(1)Insert the front end of the ink tank into the Print 
Head.
(2)Press on the   mark on the ink tank until the 
ink tank snaps firmly into place.
(3)Make sure that the ink lamp lights up red.
6Close the Inner Cover.
Important
Install all the ink tanks to print. The machine cannot be 
used unless all the ink tanks are installed.
Note
Make sure that the Inner Cover is closed. Printing will 
not start with the Inner Cover open since paper cannot 
be fed...

112Routine Maintenance
7Gently close the Scanning Unit (Printer Cover).
CautionzBe sure to hold the Scanning Unit (Printer Cover) firmly using both hands, and be careful not to 
get your fingers caught.
z Do not hold the LCD.
Note
zIf the error message is still displayed after the Scanning Unit (Printer Cover) is closed, see “An 
Error Message Is Displayed on the LCD” on page 133.
z When you start printing after replacing the ink tank, Print Head Cleaning is performed 
automatically. Do not perform any...

113
Routine Maintenance
Keeping the Best Printing Results
To avoid drying of the Print Head and cl ogging of the nozzles, note the following.
„When You Turn Off the Machine
Follow the procedure below to turn off the machine.
(1) Press the  ON/OFF button to turn off the machine.
(2) Confirm that all the lamps on  the Operation Panel have gone out.
This takes a few seconds or as long as around 1 minute. 
(3) Unplug the power cord from the wall outlet.
If you are using a power outlet strip, you can switch...

114Routine Maintenance
When Printing Becomes Fain t or Colors Are Incorrect
When printing becomes faint or colors are incorrect  even if ink remains in the ink tanks, the print 
head nozzles are probably clogged. Print the nozzle c heck pattern to confirm the condition of the 
nozzles and then perform Print Head Cleaning.
If print results are not satisfactory, performing Print Head Alignment may improve print quality.
z If the Ruled Lines Are Shifted
Note
Before performing maintenance
zOpen the Scanning...

115
Routine Maintenance
Printing the Nozzle Check Pattern
Print the nozzle check pattern to determine whet her the ink ejects properly from the print head 
nozzles.
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...

116Routine Maintenance
Examining the Nozzle Check Pattern
Examine the nozzle check pattern,  and perform cleaning if necessary.
1Check the nozzle check pattern you printed.
(1)Check if lines in this pattern are missing.
(A) Good
(B) Lines are missing
(2) Check if there are white streaks in this pattern.
(A) Good
(B) White streaks present
2The confirmation screens for white streaks and missing lines are displayed 
alternately. Select the pattern that is closer to the nozzle check pattern that you...