Rotation Servo Amp Circuit Module

Rotation Servo Amp
Ref No. 6JA/6370475
Ser. No. 224/E
DL 7736-00155
Issue 5

A servo drive receives a command signal from a control system, amplifies the signal, and transmits electric current to the E3R Platform gyro motor in order to produce motion proportional to the command signal. A sensor attached to the gyro motor reports the motor's actual status back to the servo drive. The servo drive then compares the actual motor status with the commanded motor status. It then alters the voltage frequency or pulse width to the motor so as to correct for any deviation from the commanded status.
An associated repair order document states:
"Faulty. Removed from Unit 12-001-02/E #5069
RO A01148/R37521.
Contract SJR649437
BAE Warton
Removed 20/06/90
Causes 'C' frame to twitch violently in Synchro control."

Used in the E3R IN Platform probably fitted to an Indian Air Force Jaguar