COBHAM SEA TEL 9711IMA-70, Installation Manual

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9711IMA-70 Installation Troubleshooting
14-1
14. Installation Troubleshooting
This section describes the theory of operation to aid in troubleshooting and adjustments of the antenna system. Also refer
to the Troubleshooting section of your ACU manual for additional troubleshooting details.
WARNING: Electrical Hazard – Dangerous AC Voltages exist in the Breaker Box and the Antenna
Pedestal Power Supply. Observe proper safety precautions when working inside the Antenna
Breaker Box or Power Supply.
WARNING: RF Radiation Hazard - This stabilized antenna system is designed to be used with
transmit/receive equipment manufactured by others. Refer to the documentation supplied by the
manufacturer which will describe potential hazards, including exposure to RF radiation, associated
with the improper use of the transmit/receive equipment. Note that the transmit/receive
equipment will operate independently of the stabilized antenna system.
The ultimate responsibility for safety rests with the facility operator and the individuals
who work on the system.
WARNING: RF Radiation Hazard - Prior to working on the stabilized antenna system, the power
to the
transmit/receive equipment must be locked out and tagged. Turning OFF power to the
Antenna Control Unit does NOT turn Transmit power output OFF.
The ultimate responsibility for safety rests with the facility operator and the individuals
who work on the system.
WARNING: RF Radiation Hazard - When the transmit/receive system is in operation, no one
should be allowed anywhere within the radiated beam being emitted from the reflector.
The ultimate responsibility for safety rests with the facility operator and the individuals
who work on the system.
14.1. Troubleshooting Ships Gyro Compass problems
Ships Heading display does not follow ships movement and/or you are getting frequent or constant ERROR CODE
0001. Determine the type of gyro compass that is used on the ship, assure that the GYRO TYPE parameter is set
correctly (refer to the setup section of this manual) and then proceed to the step that lists the troubleshooting for
the correct type of Gyro Compass Signal.
14.1.1. STEP-BY-STEP
1. Verify that the GYRO TYPE parameter is set correctly.
2. Observe the ERROR LED on the FRONT panel. If it is illuminated, this indicates that an error was
detected in the Step-By-Step input. Press RESET on the front panel. If the ERROR LED
illuminates again, the problem is in the four connections to A, B, C and COMMON.
3. Check the connections to the TMS and to the ACU.
4. Measure the voltage between COMMON and A, B, and C. Each reading should either be near
zero or 35 to 70 VDC. If all three are zero, check the repeater fuses. If some read negative and
some read positive or if one reads an intermediate values the COMMON terminal is not properly
connected.
5. If the
Ship
- Heading display is different from the actual Gyro heading, access the Heading
entry menu and key in the correct heading value (refer to the operation Ship menu section).
Note the reading. After the ship has turned more than one degree, compare the new gyro
heading with the reading on the display, if it has moved in the opposite direction then reverse
connections A and B. Reset the ACU, put in the correct ship's heading again and verify that the
display reading now follows the Gyro heading.
14.1.2. 1:1 SYNCHRO
Observe the ship's heading display on the ACU. Compare its movement with that of the ship. If it does
not move at all go to step 1. If it moves but in the wrong direction (even if it does not display the correct
EAR Controlled - ECCN EAR99