Raytheon 138-119 Operator's And Service Manual page 35

Example:
If power supply 1 fails all in the system1 connected devices (Magnetic Sonde 1, Operator
Unit 1 and Distribution Unit 1) are supplied with the necessary voltage from power supply 2
(via the Distribution Unit 2).
The Change Over Box is supplied with operating voltage via both Distribution Units further-
more.
3769DOC000002
Change Over Box
138- -119
NOTE:
This Gyro which is connected to that Distribution Unit
whose connected power supply fails, is no longer
supplied with operating voltage.
29
COMPASS
STD22
Edition: April 06, 2005