C. Crane FM Transmitter Operating Instructions Manual page 14

Safety Instructions
10) If the transmitter is stored for long periods of time, unplug it from
the wall outlet and remove the batteries. This will prevent damage
caused by lightning or power line surges and battery acid from
old batteries leaking inside of the transmitter.
11) Never attempt to service the FM Transmitter yourself. Removing
the cover may expose you to dangerous voltage levels and will
void the warranty. Refer all servicing to authorized service
personnel.
12) The FM Transmitter should be serviced by qualified service
personnel when:
a) Objects have fallen or liquid has been spilled into the
transmitter;
b) The transmitter has been exposed to rain;
c) The transmitter does not appear to operate normally or
exhibits a marked change in performance; or
d) The transmitter has been dropped or the enclosure damaged.
13) If liquid leaks into the transmitter, do not turn it on. The interior of
the transmitter must be fully dry or it will be damaged when power
is applied.
14) The user should not attempt to service this transmitter beyond
that described in the operating instructions. All other servicing
should be referred to qualified service personnel. The symbols
below are to alert you to important operation or servicing instruc-
tions that may appear in the owner's manual.
Page 14 FM Transmitter