4.4.1 CPU Board
1. Remove the seven Molex connectors from the CPU.
2. Remove eleven #6-32 x 3/8" machine screws from
the PCB.
3. Remove the assembly from the main support.
4. Installation of the replacement assembly is the
reverse of this. Reinstall all Molex connectors
removed in Step 1.
5. Calibrate the Gyro and LNB as described in
Section 4.5.
6. Reinstall your preferred satellites as instructed in
Section 2.5, “Selecting the Active Satellite.”
4.4.2 RF Detector Board
The RF Detector receives operating voltages from both the CPU
board and the IRD (via the RF cable). Ensure that
all
power
(including the IRD) is turned off before proceeding.
1. Unplug the Data and RF Flash cables from the
RF Board.
2. Observe which RF cable is attached to the top RF
connector. Add a piece of tape or some identifying
mark so that the RF cables can be plugged into the
proper RF connectors on the new RF Board.
4-5
Maintenance
54-0166 Rev. B
Figure 4-4
PCB Mounting (Top View)
RFU PCB
Main PCB
Antenna Frame
