first>> read the information about any medical machine , undestand the digram, service and data sheet>secand>> when you make any maintain be sure how the machine work<
know about electric for example how measuring any electronic board
by
ahmed al najjar , biomedical technation , faculity of scince - mansoura univercity
u can do this by knownig the basic theory for each equipment and the tech is differ from one equipment to another
u can read ther service & user manual for each equipment to repair it
You should do internship or service and maintenance training in some reputed medical company dealing in high tech medical equipments and gain an experience of at least2-3 years.