What was found
FLT 501, EWR-FLL, DIVERTED TO JAX, AT CRUISE PILOTS/FLT ATTENDANTS NOTICED A VIBRATION FOLLOWED BY ELECTRICAL FUMES MAINLY IN THE COCKPIT & FORWARD CABIN. STARTED SMOKE/FUME REMOVAL CHECKLIST, SHUT OFF COMMERCIAL/LIVE TVS BLOWER/EXTRACT OVERRIDE ALSO HAD A EXTRACT FAULT ECAM. ONCE QRC COMPLETE & AT 10,000 FUMES BECAME LESS INTENSE LANDING SAFELY IN JAX. REMOVED AND REPLACED AVIONICS EXTRACT FAN (18HQ) IAW AMM 21-26-51, OPS CHECK NORMAL, A/C OK FOR SERVICE.