As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACARS PRINTER FAILED, THEN NOTICED A FAINT BURNING SMELL. SEEMS TO BE COMING FROM THE PRINTER. FLT#4580 INSPECTED COCKPIT FOR BURNING SMELL. NO DEFECTS NOTED. VERIFIED ACARS PRINTER INOPERATIVE. INSTALLED NEW ACARS PRINTER. PRINTER OPERATES NORMALLY. PN 8055515-4507, SN ON PTA458-06873, SN OFF PTA45B-06776.