SeaSpace TeraScan 1.5M, Operation And Maintenance Manual

Page: 112 / 232

96
SeaSpace Corporation
Antenna moves but
does not go to the
correct position -
ELEVATION.
ac 1 el 90.0
ac 1 el 0.0
ac 1 P
Level platform assembly
does not rotate freely on
cross-level beam.
Worn/broken level
platform drive belt.
Drive belt too tight.
Loosen nut (drawing 70918005,
page 55) on level platform
assembly.
Replace drive belt {8.4.34}.
Adjust belt {8.4.34, Step 5}.
Antenna moves to
some elevations but
not to others.
ac 1 el 90.0
ac 1 el 0.0
ac 1 el 90.0
Elevation drive belt has
lost a tooth.
Harness cables binding.
Replace elevation drive belt
{8.4.32}.
Reposition harness.
Antenna does not
move in response to
an
AZIMUTH drive
command.
ac 1 az 300.0
ac 1 pos
A pin is pushed in on the
pedestal harness at PCU
connector. Pull the pin back out, realign it,
and reseat the connector.
PCU is faulty. Replace PCU {8.4.1}
Worn/broken drive belt. Replace drive belt {8.4.33}.
Bad azimuth drive motor. Replace azimuth drive motor
{8.4.2}.
Bad pedestal harness. Replace pedestal harness.
Replace motor harmess
(6003AL only).
Motor drive sprocket is
loose. Replace motor drive sprocket.
Antenna moves but
does not go to the
correct position -
AZIMUTH.
ac 1 az 30.0
ac 1 az 360.0
Azimuth pot [12574510]
faulty. Replace azimuth pot {8.4.9}
(6003L only).
Pedestal harness faulty/
wire broken. Replace pedestal harness.
Worn/broken drive belt. Replace drive belt {8.4.35}.
7.2.4.2 Tracking Positioner (cont.)
CONDITION TEST CAUSE ACTION