I really believe the aux connector in question to be "opened", not
short. If current is drawn exceeding the rating, the trace "opens"
removing a path for current to flow.
If a component becomes defective prior to the "open", that component may
cause a "short", that is, a path to ground.
It is good practice to use a meter and measure that for any path to
ground prior to replacing/repairing the "fuse".
However, I suspect someone may have connect a device requiring more
current than supplied by the radio. Accidents happen. (smile)
As pointed out, a simple trace repair or fuse addition may be all that
is needed.
Good luck!
Ron wb1hga
"CW, an esoteric experience"
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