We were on the ship last october. there are laundry rooms on the passenger decks which get quite full on sea days. they include a washing machine, dryer, iron & board. The machines have a timer display on them - about 45 mins each if I remember - to help you go away & come back. The iron is on a timer that you set, lasts an hour I think. pay by $ bills/ quarters. the rooms have powder dispensers & also dispensers for a fabric softener strip that goes in the dryer.
If you mean launderettes for the passengers to use, there was when I was on the ship 3 years ago. The Pacific Islands are lovely and so are the people some can be rather expensive, for drinks, soveneirs etc. Have a great time.