5.2
Battery replacement is accomplished by removing three set screws (3)
while holding the microphone and mouthpiece assembly (2) in place. The
six battery cells, contained in three tubes with two cells per tube, are
immediately accessible and will drop out when the megaphone is tilted.
New batteries may be dropped into the tubes, observing polarity marking
adjacent to each tube.
5.3
Replace microphone and mouthpiece assembly (2). Align keyway and
secure with the three set screws (3).
CAUTION: Observe polarity of cells carefully before replacement.
6.0 TESTING
Note:
The megaphone consists of three major assemblies; the microphone and
mouthpiece assembly, the megaphone sub-assembly, and the horn and
speaker assembly. To locate a defect, follow the procedure outlined
below:
6.1
Squeeze the handle. If a clicking sound is heard, the speaker is operating.
6.2
If no sound is heard, remove the microphone and mouthpiece assembly
and the batteries. Check that both the microphone and battery contacts are
clean. If not, clean with a mild, non-abrasive cleaner such as alcohol.
6.3
Test amplifier and speaker assembly by replacing the microphone with a
spare microphone assembly. If no sound can be produced after
microphone replacement, it may be assumed that the amplifier or speaker
assembly is defective.
6.4
To test the speaker, disassemble the speaker. Disconnect one wire and
apply 1 ½ volts intermittently across the speaker. If no clicks are heard,
the speaker is defective.
Y1-03-0057 Rev. F
5
