KVH Industries TracVision G8 - Manual (Page 84)

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TracVision G8 Owner’s Manual - Guide to Technical Information
4.2 Causes and Remedies for
Common Operational Issues
There are a number of common issues that can affect the
performance of the TracVision G8. The following sections address
these issues and potential solutions.
Power Disturbance, Blown Fuse, or Low Power
Power Disturbance
If the MCU detects a short in the output to the antenna,
the MCU’s resettable fuse trips. If this occurs, remove the
short then wait one minute for the fuse to reset. If the
MCU detects any other power disturbance, such as a
voltage spike, the system shuts itself down. If this occurs,
simply disconnect power from the MCU, wait 20 seconds,
then restore power.
Blown Fuse
The antenna unit is equipped with a 5-amp, 125-volt fast-
blow fuse on the PCB module. The MCU is equipped
with a 15-amp, 125-volt fast-blow fuse on its rear panel. If
either of these fuses has blown or been broken, the system
will not work. To access the MCU fuse, simply unscrew
the fuse holder cap on the rear panel. For details on
accessing the antenna’s PCB module fuse, refer to
Section 5.5, “Replacing the PCB Module Fuse,” on page 98.
Figure 4-1 MCU Fuse
Low Power
If the power cable from vessel power to the MCU is more
than 50 ft (15 m) in length, the power level can decrease
over the course of the cable, resulting in a voltage level at
the antenna unit that is too low to power the system.
Refer to “Connecting Vessel Power and the MCU Ground
Wire” on page 36 for details on supplying adequate power
to the antenna unit.
Fuse