As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE TO DCA CREW REPORTED SMOKE SMELL IN CABIN. CREW DECLARED EMERGENCY AND DIVERTED TO CMH. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT PER EMB AMM AND FOUND COFFEEMAKER TO BE AT FAULT. MAINTENANCE REMOVED AND REPLACED COFFEEMAKER PER EMB AMM AND OPS CHECK GOOD.