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3.3.3.3
DC Operation – Fuse Replacement (Optional)
For DC operation the CDM-425 requires two different fuses that are contained within the
individual screw-in receptacles below the terminal block (located on the rear panel, Figure 3-15).
WARNING! DISCONNECT THE POWER SUPPLY BEFORE PROCEEDING!
To replace the fuses, do these steps:
1. Unscrew either fuse holder from its receptacle. Then, remove and replace the modem
and/or the BUC fuse(s):
a. Use T3A (3 Amp) 250V fuses for modem operation (left-hand receptacle).
b. Use T6.3A (6.3 Amp) 250V fuses when a Block Upconverter (BUC) is installed
2. Screw either fuse holder back into its receptacle.
Rear Panel Connectors and Pinouts
Figure 3-15. DC Chassis Fuse Replacement (Optional)
(right-hand receptacle).
CAUTION – FOR CONTINUED OPERATOR SAFETY, ALWAYS REPLACE
THE FUSES WITH THE CORRECT TYPE AND RATING.
CDM-425 Advanced Satellite Modem
3–24
Revision 0
MN-CDM-425
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