NORTHROP GRUMMAN Sperry Marine NAVIGAT X MK 2, Assembly Instructions Manual

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NAVIGAT X Mk 2 056341 Rev. AA
4: Preventive Maintenance Page 4-3
4.2.2 Removing the gyrosphere container from the compass housing
Parts required
– a 5mm Allen key
– a No. 2 Philips-head screwdriver
Procedure
1) Make sure the compass' main and backup power supplies are switched off
and safeguarded against accidental switching-on.
Caution
The gyrosphere container with the gyrosphere installed must be handled very
carefully. The container must be kept in an upright position at all times.
2) Unscrew the 5 mm Allen-head screws of
the compass housing door and take off
the door from the housing.
3) Disconnect the grounding strap be-
tween door and housing. Place the door
aside. If the door is put next to the hous-
ing, the keypad's ribbon cable may be
left connected to the main PCB.
4) Unplug the gyrosphere supply and
phase bridge connector from its socket
on the gyrosphere container.