Raytheon 138-119, Operator'S And Service Manual

Page: 43 / 55

COMPASS
STD22
Change Over Box
138--119
37
3769DOC000002
Edition: April 06, 2005
5.2.4.1 Exchanging of Fuses
CAUTION!
Use only fuses with prescribed technical data (see parts list
at the wiring diagram).
Do not replace fuses under load.
The fuses E1 to E13 are located at the terminal board L1 of the Change Over Box (see wi-
ring diagram 138--119.HP008).
If one of the fuses E1 or E2 blows, the system status is according to switch position “Sys1”,
it means the output signals of the Distribution Unit 1 are fed to the Change Over Box.
If both fuses (E1 and E2) are blown, all receivers which
are supplied via the Change Over Box are no longer
supplied with operating voltage.
1. Switch OFF both power supplies (disconnection from ship‘s mains).
2. Unscrew the cover of the housing.
3. Remove blown fuse out of the fuse holder.
4. Insert new fuse (attend the correct type).
5. Screw on the cover again and pay attention to a proper position of the sealing.
6. Switch ON both power supplies.