To clean this print head you must first remove it from the printer.
Open the cover and wait until the carriage aligns itself to the "stop mode"
Remove the cartridges and then lift the lever to the side of the carriage.
The print head is all black and comes out by lifting the side.
There are five ports where the ink enters from the cartridges. On the bottom you will see a white plate where the nozzles are situated.One long and one square.
Do not separate any parts of the print head. This is critical. Do not remove the two screws that secures the white base. This base is where the nozzles are situated. Leave all parts intact.
The ink can become like sludge or can dry inside the print head.
This is my solution to clean the print head:
Run hot water over the entire set of ports. You will see the colours run. Let the hot water run over these ports for a few minutes
Turn the head over and run the hot water over the nozzles. You will see colours coming out from the nozzels.
Alternate this procedure a few times until the hot water runs clear.
In some cases the ink may become like sludge or too dry inside the head. If this does not fix the problem then allow the head to sit in hot water overnight. Place it in a water to allow the water to just cover the nozzles about 1/2 inch
In very stubborn cases Ive set the head in household vinegar overnight.
There is a channel that runs between the ports and the nozzles. It is jointed with a rubber seal. To access this the bottom white plate must be removed. This is accomplished by removing the two little screws of the white plate. DO NOT ATTEMPT TO REMOVE THIS WHITE PLATE. THE FOIL CONNECTION WILL BE BROKEN. YOU WILL GET AN ERROR MESSAGE " WRONG PRINT HEAD INSTALLED" The print head will be destroyed.