What was found
DURING TAXI OUT AT WSAP, THE CREW SMELLED SMOKE, THEN THE FIRST OFFICER'S AUDIO CIRCUIT BREAKER OPEN, THE FIRST OFFICER'S OVER HEAD SPEAKER WAS HOT TO TOUCH, THE CREW RETURNED TO BLOCK WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED FIRST OFFICER'S OVERHEAD SPEAKER, IAW DACO MAINTENANCE MANUAL 23-00. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.