GCS CYSCAN, Руководство по установке и обслуживанию, Страница: 26 / 52

24 CyScan Positioning System • Installation and Maintenance Guide r1.1
GCS GCS
Stage 8 - The Vertical Reference Unit (VRU)
To remove the Vertical Reference Unit (VRU):
1 Looking into the Bow end of the
sensor body, locate the Vertical
Reference Unit which is a small circuit
board mounted horizontally. Discon-
nect both of the ribbon cable con-
nectors from the VRU board.
2 Using a flat blade screwdriver,
remove the four M3 x 6 screws that
secure the VRU to the sensor frame.
Lift aside the earth lead from the
front left screw hole.
3 Lift out the VRU board.
To fit the Vertical Reference Unit (VRU):
1 Looking from the Bow end
of the sensor body, locate
the mounting space for the
VRU (the horizontal space
bordered on three sides by
the controller board and the
two actuators. Place the
VRU board into the space
so that its two ribbon cable
connectors face the Stern
end of the sensor.
2 Insert four screws into the
VRU board mounting holes.
An earth strap must be
placed onto the screw in
the front left corner (as
viewed from above). Using
a flat blade screwdriver,
tighten all four screws to
reasonable hand tightness.
3 Locate the VRU ribbon cable leading from the controller board and attach it to the
starboard side connector of the two.
4 Locate the ribbon cable leading from the yaw gyro board and attach it to the port
side connector of the two.
To
controller
To
yaw gyro
Earth strap