Switching Off The Change Over Box - Raytheon 138-119 Operator's And Service Manual

Below mentioned tests have to be carried out:
No.
1
2
3
If errors should occur during the function test, appropriate measures have to be seized for
repair.
3.5

Switching OFF the Change Over Box

The Change Over Box has no ON/OFF switch.
The Change Over Box is shut down by switching OFF both 24 V DC power supplies.
A single Change Over Box can be switched OFF by disconnection of one fuse E1 or E2.
3769DOC000002
Action
Switch the Change Over Switch from
"Automatic" to "Sys1".
Switch the Change Over Switch from
position "Sys1" to position "Sys2".
Switch the Change Over Switch from
"Sys2" to "Automatic".
Change Over Box
138- -119
No LED lights up at the relays of the
Change Over Box.
All outputs of the DU1 are switched to
the outputs of the Change Over Box.
All LED LEDs light up at the relays of
the Change Over Box.
All outputs of the DU2 are switched to
the outputs of the Change Over Box.
No LED lights up at the relays of the
Change Over Box.
All outputs of the DU1 are switched to
the outputs of the Change Over Box.
23
COMPASS
Nominal state
Edition: April 06, 2005
STD22