What was found
IN CRUISE AT FL340, CREW RECEIVED AN EFIS COMP MON FAIL MESSAGE, FOLLOWED BY ADC1 FAIL AND FINALLY A STALL FAIL CAUTION MSG. PER QRH CREW DECLARE EMERGENCY AND DIVERTED TO MEM. INSPECTED MAIN PITOT / STAND BY PITOT DRAIN ASSY IAW CRJ 700 AMM 34-11-00-220-802/805-A01/A02. FOUND MOISTURE IN P3. REPLACED ADC 1 AND DRAINED PITOT STATIC DRAIN ASSEMBLIES IAW CRJ 700 AMM 34-13-01-000/400-801-A01-PSA AND CRJ 700 AMM 34-11-00-220-801 OPS CHECK GOOD. MODE C RETURN TO SERVICE CHECK REQUIRED. PERFORMED MODE C CHECK IAW CRJ 700 AMM 34-54-00-720-802-A01-PSA. OPS CHECK GOOD NO DEFECTS NOTED AT THIS TIME.