According to the user manual, the Hitache EUB-550 Ultrasound Diagnostic Scanner installs with a default password for special operation mode. This requires physical access to the device.
Special Operation for Service Personnel
3.2.1 Initialization of system environment
(1) Press Ctrl + Alt + S key to display the ‘Special Function’ dialog.
(2) Select ‘Service Tools’ from the Select item.
(3) After entering ‘SERVICETOOL’ for Password, click the ‘OK’ button to start ‘Service Tools’.
NOTE: 3) For entering Password, make sure to type it in capital letters. (With the state of Caps Lock key located on the keyboard being lit in orange color.)