Do a manual clean, google is your friend for cleaning videos if unsure, run through cleaning cycles then run a few of those test prints and then do a head test print, sometimes after just cleaning cycles the test can look worse than of its done some proper work. Try another media if unsure on your current one. Did you get a head test print before you bought it? Always sensible to do that. Buying used can be fine you just need to buy the right things that's all but a proper Roland engineer visit would be a costly exercise but might save you wasting money on something that's had its day, decide after a few trials though. Think you get a discount on any parts needed if you also take out a warranty after so enquire on That too if feeling flush