Replacing the Main PCB
1. With a PC connected to the ADCU’s maintenance
port, apply power to the antenna unit.
2. Record the system serial number for later re-entry
(the serial number is listed at the beginning of the
startup sequence, as shown in Appendix E on
page 145).
3. Disconnect power from the antenna unit and the
IRD.
4. Remove the PCB cover, as explained in “Removing
the PCB Cover” on page 108.
5. Disconnect all Molex connectors from the main PCB
(see Figure 5-3).
6. Remove the nine #6-32 screws that secure the PCB
to the antenna frame (see Figure 5-4).
7. Remove the PCB from the antenna frame.
8. Reverse this process to install the replacement
PCB. Reconnect all connectors removed in Step 5.
9. Reinstall the PCB cover.
10. Apply power to the antenna unit.
11. Type
HALT<cr> (<cr> indicates a carriage return/
ENTER key).
12. Type
DEBUGON<cr>.
13. Type
=TVG6<cr>.
14. Type
=SERNUM,<serial number><cr>, where
<serial number> = the system serial number you
recorded in Step 2.
15. Type
ZAP<cr> to restart/reinitialize the system.
16. Calibrate the antenna gyro as explained in
“Calibrating the Antenna Gyro” on page 113.
17. Reinstall your selected satellites as directed in
Section 2.9, “Installing Satellites Using the ADCU” on
page 46.
54-0161
110
TracVision G6 Technical Manual
Refer to
Section 4.6, “Computer
Diagnostics” on page 100
for
complete details on connecting a
PC to the system via the
maintenance port.
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