written by Larry
from discussions in rec.arts.movies.production.sound
published on Soundspeed
As much as we would like to avoid it, there is always a chance one of our
wireless transmitters will decide to take a swim. Here are a couple guidelines
on what to do when it comes back to shore to try and keep it in working
Get the battery out of the unit as quickly as possible. Turning the unit
off is not enough. Wash the unit with clean or distilled water. If it fell
in sea water, wash it with any water that has less salt in it than the sea
water.(Diet Coke or a dry martini, shaken not stirred). Vodka or other alcohol
that doesn't have lots of additives in it can be used in a pinch also. An
alcohol final rinse is a good bet, both to promote faster drying and to
clean off any dirt or oils that may have been in the water. Tilt the boards
so that the alcohol runs off and doesn't puddle around the tiny adjustment
After the final rinse, shake the boards to remove the alcohol or water.
Then warm the boards to drive off the residual water left from the water
or alcohol final rinse. Hair dryers, light bulbs, warm oven, engine block,
sunlight, heater vents, etc. As far as the maximum temperature, as long
as you can firmly touch the components and not quickly feel pain (140 F)
you are OK. After several hours or more and the unit is bone dry, put in
a battery and try the system.
In fresh water with the battery in the unit, you have a few minutes before
serious damage results. In salt water, with the battery in the unit, it
is a matter of seconds.
Get the battery out of the unit as quickly as possible. If it fell in sea
water, don't bother opening the unit to wash it. Plunge the entire unit
with the battery door open into water or alcohol. Or pour water or alcohol
into the unit and slosh it around. Then do it a second time with a fresh
batch of water or alcohol. Then you can open the unit and do a third rinse.
Inspect the circuit traces for corrosion. If there is visible corrosion,
it needs to come back to the factory. We usually end up replacing the circuit
boards or exchanging the unit completely.
Last update : September 22nd, 2000