This video shows the teardown and tests of a Vertical Reference Gyro 332D-11T from Collins.
00:00 - Intro
00:41 - Teardown
01:20 - Roll Stop Solenoid
02:40 - In search for the power supply pins
04:50 - Preliminary test
06:00 - Precession effect
06:45 - Pitch and Roll sensors and erection torquers
08:35 - Schematic Diagram (older version 332D-11A)
10:32 - Final tests