1. Confirm that the printer is powered on.
   
   
2. Pull open the paper output tray.
   
   
3. Lift the scanning unit (printer cover) with hands and set the scanning unit support. (The print head will move to the replacement position.)
   
   
   
   
   Note: When the scanning unit (printer cover) is opened more than ten minutes, the print head moves to the right side. If this occurs, close the scanning unit (printer cover), and open it again.
   
   
4. Remove the ink tanks by pressing the tab of each tank.
   
   Caution: Handle the ink tanks with care so that your clothes and surrounding area do not get soiled. Make sure to remove the ink tanks one by one.
   
   
   
   The above illustration depicts ink tanks being removed from an MX850.
   
   

Click to return to the top.

Reseating the Print Head

1. Raise the print head lock lever then lower it again to reseat the print head. If removing the print head to replace with a new print head, proceed to step 2.
   
   
2. Tilt the print head slightly towards the front of the machine and lift out gently.
   
   
   
   The above illustration depicts a print head being removed from an MX850.
   
   Caution: Do not touch the print head nozzles <1> , electrical contacts <2>, or ink supply ports <3>. Doing so may cause printing problems.
   
   
   

Follow the instructions below for Installing the Print Head and Re-Installing the Ink Tanks.

Installing the Print Head

1. Raise the print head lock lever.
   
   
   
   
2. Pull out the print head from its package, then remove the orange protective cap from it.
   
   
   
   
   CAUTION: Do not touch the print head nozzles <1> , electrical contacts <2>, or ink supply ports <3>. Doing so may cause printing problems.
   
   
   
   
3. Place the print head in the print head holder and lower the print head lock lever carefully until you hear a click.
   
   
   
   The above illustration depicts a print head being installed in an MX850.
   
   

Re-Installing the Ink Tanks

1. Insert ink tanks into the print head.
   
   NOTE: Press the mark <PUSH> on the ink tank firmly until you hear a click.
   
   
   
   The above illustration depicts ink tanks being installed in an MX850.
   
   
   

2. Ensure that all the ink tanks are installed properly and the ink tank lamps light red.
   
   
   
   
   <1> The ink tanks are installed properly.
   
   <2> The ink tanks are not installed properly.
   
   

3. Lift the scanning unit (printer cover) slightly to set the scanning unit support back to its original position, and then gently close the scanning unit (printer cover).