What was found
SMELL OF BURNING IN THE COCKPIT ASSOCIATED WITH COCKPIT DOOR LOCK SWITCHING ON AND OFF. DOOR LOCK/CHIME MODULE WAS HOT TO THE TOUCH. MOVE FLIGHT DECK ACCESS SWITCH TO OFF AND THE SMELL WENT AWAY AND DOOR LOCK SWITCHING STOPPED. ONE HOUR LATER THE SMELL RETURNED AND FLIGHT ATTENDANTS REPORTED. THE LIGHT ON THE COCKPIT AND PAD STARTED FLASHING. SMOKE WAS REPORTED COMING FROM THE LOCK AREA.<[01] R&R CHIME MODULE REF. AMM 52-51-06. OPS CHK GOOD.