I'm attempting to bring my Bulova model TR250 ultrasonic watchmaster
cleaner back into service. I have found two rectifier diodes blown,
along with the circuit protection fuse. The wafer transducer is epoxied
to the the tank, and I am not sure how to go about testing for
problems. It appears to be solidly mounted to the tank with no visible
fractures to the epoxy joint. However, I suspect there is a problem
with it, as it has lost its cleaning abilities. This model seems t
have been made in the mid '80s.

Thanks for your help!