TracPhone V7 Guide

TracPhone V7
1
Gyro Replacement Instructions
TracPhone®V7 Gyro Replacement
Instructions
The following instructions explain how to replace the azimuth,
elevation, or skew gyro in a TracPhone V7.
Tools Required
• #2 Phillips screwdriver
• Cutting pliers
• 5/16" nut driver or wrench
• Electrical tape or heat shrink tubing/heat gun
To perform the calibration step in this procedure, the vessel must
remain stationary in calm seas.
IMPORTANT!
Be sure to avoid causing sharp bends in cables when securing or
routing cables in the following procedure. Sharp bends or kinks
in cables can degrade antenna performance. Also be sure to trim
the excess portion of any tie-wraps you install and collect all tie-
wrap trimmings from the antenna to avoid damage when the unit
rotates.
IMPORTANT!
Gyros are sensitive to shock. Handle the gyro carefully to avoid
damage.
IMPORTANT!
CAUTION
For your own safety, be sure to disconnect power from all wired
components before performing this procedure.
54-0516 Rev. B

TracPhone V7
2
Gyro Replacement Instructions
Step 1 - Identify the Gyro Location
a. Turn off and unplug the modem and control unit.
b. Using a #2 Phillips screwdriver, remove the #10-32
screws securing the radome to the baseplate. Carefully
lift the radome straight up until clear of the antenna
assembly and set it aside in a safe place.
Figure 1 Removing the Radome
c. Identify the location of the gyro you need to replace.
Figure 2 Gyro Locations
#10-32 Screw
Azimuth
Elevation
Skew

TracPhone V7
3
Gyro Replacement Instructions
Step 2 - Replace the Gyro
The replacement process differs slightly for each gyro. Follow the
associated steps for the gyro you need to replace:
Gyro Go to Page:
Azimuth 4
Elevation 5
Skew 6

TracPhone V7
4
Gyro Replacement Instructions
Replacing the Azimuth Gyro
a. Using a 5/16" nut driver or wrench, remove and save
the P-clip securing the gyro wires to the cable bundle.
Figure 3 Removing the Azimuth Gyro
b. Using cutting pliers, cut and remove the two tie-wraps
securing the gyro wires to the cable bundle.
c. Follow the gyro wires to find its heat-shrink-covered
in-line connector. Carefully strip back and remove the
heat shrink to access the connector.
d. Disconnect the connector.
e. Using a 5/16" nut driver or wrench, remove the two
#6-32 lock nuts securing the gyro to the antenna
bracket. Remove and discard the old gyro.
f. Secure the replacement gyro to the antenna bracket
using the two lock nuts you removed in the previous
step.
g. Connect the replacement gyro’s connector at the in-line
connection. Protect the connection with electrical tape
or heat shrink.
h. Secure the gyro wires to the cable bundle using the
P-clip you removed earlier and two supplied tie-wraps.
i. Reinstall the radome.
P-clip
Tie-wraps
#6-32 Lock Nut (x2)
Azimuth Gyro
Connector

TracPhone V7
5
Gyro Replacement Instructions
Replacing the Elevation Gyro
a. Using a 5/16" nut driver or wrench, remove and save
the P-clip securing the gyro wires to the cable bundle.
Figure 4 Removing the Elevation Gyro
b. Using cutting pliers, cut and remove the tie-wrap
securing the gyro wires to the cable bundle.
c. Follow the gyro wires to find its heat-shrink-covered
in-line connector. Carefully strip back and remove the
heat shrink to access the connector.
d. Disconnect the connector.
e. Using a 5/16" nut driver or wrench, remove the two
#6-32 lock nuts securing the gyro to the antenna
bracket. Remove and discard the old gyro.
f. Secure the replacement gyro to the antenna bracket
using the two lock nuts you removed in the previous
step.
g. Connect the replacement gyro’s connector at the in-line
connection. Protect the connection with electrical tape
or heat shrink.
h. Secure the gyro wires to the cable bundle using the
P-clip you removed earlier and a supplied tie-wrap.
i. Reinstall the radome.
P-clip
Tie-wrap
#6-32 Lock Nut (x2)
Elevation Gyro
Connector