Epson Stylus Color 640 User Manual page 101

Caution:
Never turn off the
printer while the
Ppower light is
flashing, unless the
printer hasn't moved
or made any noise for
more than 5 minutes.
Maintenance and Transportation
3 Click the Utility tab. You see the Utility menu.
4 Click the Head Cleaning button.
5 Follow the instructions on the screen to clean the print head.
Cleaning takes about one minute, during which the printer
makes some noise and the Ppower light flashes.
When the cleaning cycle is finished (the Ppower light stops
flashing), you need to run a nozzle check to confirm that the
print head nozzles are clean and to reset the printer's cleaning
cycle.
Page 101