126
MDS iNET Series Reference Manual
05-2806A01, Rev. L
5.2
Fuse Replacement
An internal fuse protects the transceiver from over-current conditions or an internal component failure. It
should not be replaced until you are certain you are in a safe (non-flammable) environment.
1. Disconnect the primary power source and all other connections to the unit.
2. Place the radio
on its back and remove the four Phillips screws on the bottom cover.
3. Carefully separate the top and bottom covers. There is a flat ribbon cable between the top cover’s LEDs
and the unit motherboard. You do not need to disconnect the ribbon cable.
4. Locate the fuse and fuse holder between the
COM1
port and the power connector. See Figure 5-4 for
details.
5. Loosen the fuse from the holder using a very small screwdriver. Use a small pair of needle-nose pliers to
pull the fuse straight up and remove it.
6. Using an Ohmmeter, or other continuity tester, verify the fuse is blown.
7. Install a new fuse by reversing the process.
Littelfuse P/N: 0454002; 452 Series, 2 Amp SMF Slo-Blo
GE MDS P/N: 29-1784A03
8. Install the covers and check the transceiver for proper operation.
Invisible place holder
5.3
Technical Specifications
GENERAL
Temperature Range:
–30° C to +60° C (–22° F to 140° F)
Humidity:
95% at +40° C (104° F); non-condensing
Primary Power:
10–30 Vdc (13.8 Vdc Nominal)
External Power Supply Options:
110–120/210–220 Vac
Supply Current (typical):
(9 Watts Maximum @ 1 Watt RF Output)
Transmit:
7 watts (10.5-24 Vdc)
9 watts (24.5-30 Vdc)
Receive:
2.8 watts (10.5-24 Vdc)
3.5 watts (24.5-30 Vdc)
MTBF (Reliability):
Consult factory for on-file data
Figure 5-4.
Internal Fuse Location
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