Been using an epson 9890 for a few months now.
Auto nozzle check is off.
Sometime when I turn on the machine every 20 sec or so it makes a brief (about 2 second) 'chuckling' noise -- is the best way to describe it. sort of chk-a-chk-a-chk-a-chk
It usually keeps making this noise until I make a first print. Then *sometimes* will stop.
Everything is operating properly. A friend's 9890 does not make this noise!