Sea Tel DAC-03, Инструкция по установке и эксплуатации

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Maintenance & Troubleshooting DAC-03 Tracking Antenna Controller
7-2
If the Base Multiplexer is transmitting, but the Pedestal Multiplexer 1.1 MHz is not present, replace
the Pedestal Multiplexer. If the Pedestal Multiplexer transmit is still not present, replace the PCU.
7.2.3. NMEA GPS Checkout
When a NMEA GPS receiver is connected to J13 or J11, the NMEA LED on the AUX SERIAL PORT
ADAPTOR (ASPA) PCB will illuminate each time a NMEA message is received. The GLL LED will
illuminate each time a GPGLL or LCGLL message is received. Observe the NMEA and GLL LED’s and
confirm they are flashing about once every 2 seconds (when the system is first powered up, the GLL
LED may not appear for several minutes while the GPS receiver is acquiring the necessary satellite
signals).
If the GLL LED is illuminated constantly, this indicates the message in not being transferred to the
Main board because the system type does not include the 8 setting.
If the DISK LED flashes but the NEMA LED does not, this indicates that no data is being received OR
the TX+ and TX- connections to pins 1 and 2 are reversed.
7.2.4. Auxiliary Serial Port Adapter (J11) Checkout
When a remote computer or terminal is connected to J11, the DISK LED will illuminate steady when
a message is being received and will extinguish when the message is transferred to the Main PCB.
To test this connection, set the remote terminal (Hyper-terminal) to 4800,N,8,1 and send an "A".
The DISK LED should illuminate. Send a Carriage Return ($0D), the DISK LED should extinguish.
Send a "V", the TAC-92 should respond with the ACU version number.
7.2.5. Check Parameters Settings
Check to assure that the parameters are set correctly (to default values, or to optimized values).
7.3. 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.
7.3.1. 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 4 connections to A, B, C and COMMON.
3. Check the connections to the Terminal Mounting Strip 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.
7.3.2. 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 heading) go to step 2. If it moves in the correct direction but does not display the