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Step 2 - Replace the LNB
Follow the instructions below to replace the
linear LNB.
a. Cut and remove the tie-wrap securing the
cables to the LNB (see Figure 7).
b. Using a 7/16" open-end wrench, remove the
RF cables from the old LNB and connect them
to the same connectors on the new LNB (see
Figure 7).
c. Using a 5/64" hex key, loosen the two screws
securing the old LNB to the choke feed (see
Figure 8).
NOTE: Some antennas use wing screws instead of
hex screws to secure the LNB to the choke feed.
d. Remove the LNB.
e. Insert the new LNB into the choke feed. Be
sure to fully insert the LNB into the choke
feed to ensure optimal performance. Then
tighten the hex screws just enough to secure
the LNB in place.
f. Rotate the skew motor assembly counter-
clockwise, until the limit switch prevents
further rotation, as shown in Figure 8. This
will ensure a stable measuring surface in the
following step.
g. Using a digital level, ensure there is no more
than a 1° difference between the angle of each
measuring surface. When the LNB is position,
tighten the hex screws to secure it into place.
h. Using a supplied tie-wrap, secure the LNB
cables and skew motor cable to the LNB, as
shown in Figure 7. Be sure to leave an
adequate cable bend radius; sharp bends or
kinks in the cables can impair performance.
Figure 7 Tie-wrap/Cable Transfer
1
1
2
3
4
Tie-wrap
Figure 8 Hex Screws/LNB Alignment
Skew
Motor
Me
Measuring
Surface
Skew
Motor
M
Measuring
Surface
3
4
2
Dual-output
Linear LNB
Alignment
Hex Screw (x2)
Measuring Surface
LNB
Quad-output
Linear LNB
Alignment
Hex Screw (x2)
LNB
5
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