What was found
APPROX 20 MINUTES AFTER TAKEOFF, SMOKE AND FUMES WERE DETECTED IN THE COCKPIT. APPEARED TO BE ELECTRICAL IN ORIGIN. PREVIOUS TO THIS, NR 1 PACK WAS INDICATING -21F AND GETTING COLDER. NR 2 PACK WAS OFF AND WAS TURNED BACK ON. THEN NR 1 PACK WAS TURNED OFF. QRH PROCEDURE FOR SMOKE/FUMES COMPLETED, DIVERTED. INSPECTED BOTH FWD AVIONICS BAY & CAC FOR EVIDENCE OF SMOKE. NONE FOUND. INSPECTED BEHIND FLT DECK C/B PANELS FOR EVIDENCE OF SMOKE. NONE FOUND. INSPECTED COALESCER BAGS & FOUND NR 2 ACM FILTER FOULED. UNABLE TO GET TURBINE BYPASS VALVE FUNCTIONING ON NR 1 PACK. PLACED NR 1 & 2 PACK ON MEL. REPLACED COALESCER BAGS, NR1 PACK TURBINE BYPASS VALVE AND RAM AIR INLET DOOR ACTUATOR.