NORTHROP GRUMMAN NAVIGAT X MK 1, Руководство по эксплуатации, установке и обслуживанию

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056343/C NAVIGAT X MK 1
5-4 Protecting the Gyrosphere from Low Temperatures
Re-installing the container in the compass housing
Parts, materials and tools required
• a 5mm hex key
• a No. 2 Philips-head screwdriver
Procedure
1
DANGER
When the compass is energized, the gyrosphere operating voltage of
100 VAC @ 337 Hz is present on the master PCB, the gyrosphere supply
lines and across the gyrosphere contacts.
Before installing the gyrosphere container, make sure the main and
backup power supplies to the compass are switched off and safe-
guarded against accidental switching-on.
1. Illustrations show the Mod. 10/3 gyrosphere container. All instructions
equally apply to the Mod. 10/2 and Mod. 7/2 containers.
1. At the storage place, carefully unpack the gyrosphere container and
take it to the compass’ location.
2. Unscrew the 5 mm hex-head screws of the compass housing door
and take off the door from the housing
3. Disconnect the grounding strap between door and housing. Place
the door aside. If the door is put next to the housing, the keypad
cable may be left connected to the master PCB.
4. Gently turn the bellows, until the largest of the three coupling seats
in the bayonet collar points towards the front of the housing. The
seat is marked by a green dot on the collar.
5. Place the gyrosphere container
into the compass housing with the
largest of the three coupling
tongues located directly below the
groove in the collar. The tongue is
marked by a green dot on the con-
tainer
6. Put both hands around the con-
tainer and lift it into the collar, so
that the coupling tongues slide
into the corresponding grooves in
the bayonet.
7. While supporting the container
with both palms, put the thumbs
on the rim of the collar, pull down
on it and turn it to the right