Perform a power reset in the Clock Radio and check if the chime noise occurs. Turn OFF the Clock Radio and disconnect power cord from the wall outlet. Allow the Clock radio without power for a minute.
Reconnect the power cord, turn ON the radio and check if it is producing chime noise. If the issue persists, I suggest that you get the Radio serviced. Click on the below link to initiate the service request (If you're located in U.S):