As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SUSPECT BALLAST OVERHEATING IN MID GALLEY. TURNED OFF LIGHTS, STRONG ACRID ODOR PRESENT. REMOVED MID GALLEY CEILING PANEL AND NOTICED ODOR WAS EMANATING FROM SPEAKER DRIVE MODULE. REMOVED CONNECTOR AND ODOR DISSIPATED. REPLACED SPEAKER DRIVE MODULE. NO FURTHER REPORT OF ACRID ODOR.