What was found
DIVERTED DUE TO SMOKE IN THE CABIN & COCKPIT. MODERATE SMOKE AND FUMES OF ELECTRICAL TYPE IN CABIN AND COCKPIT. FLIGHT DIVERTED TO DTW. INSPECTED GALLEYS, CABIN, CARGO PITS AND BOTH E&E BAYS FOR ELECTRICAL RELATED PROBLEMS. FOUND AUDIO ACCESSORY UNIT WITH STRONG ELECTRICAL SMELL. CAPT AND FO WRITE-UP ALSO GENERATED SAYING UNABLE TO COMMUNICATE WITH FLT ATTENDANTS ON SERVICE INTERPHONE. REPLACED AUDIO ACCESSORY MR23505-59 UNIT CHECKED GOOD. TWO CIRCUIT BOARD FAILURES OCCURRED WITHIN THE AUDIO ACCESSORY UNIT. BOARD A1 HAD RESISTOR R1 AND CAPACITOR C2 FAILURE. BOARD A2 HAD A FAILURE OF RESISTOR R1. RESISTOR SPECIFICATIONS (R1) FOR BOTH BOARDS IS P/N RL42S100GTX (10 OHM 2WATT). CAPACITOR SPECIFICATION