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Maintenance

54-0147

Two 5x20 mm, 3.15-amp, 250-volt fast-blow fuses are mounted to
the main PCB (see Figure 5-3 on page 107). If one of these fuses
has blown or been broken, simply remove the bad fuse and
replace with a good fuse of the same rating.

1. The RF PCB receives operating voltages from both

the main PCB and the IRD (via the RF cable).
Ensure that all power (including the IRD) is
turned off before proceeding.

2. Using a 

5

⁄

16

" socket wrench, remove the four nuts

and washers securing the RF PCB cover (see 
Figure 5-5). Set the hardware and cover aside. 

RF PCB Cover

Support Frame

RF PCB