VOLUME
CONTROL
MICROPHONE
ASSEMBLY
AUDIO AMPLIFIER
SIREN CIRCUIT &
BATTERY MONITOR
MEGAPHONE
SUB-ASSEMBLY
BATTERY
PACK
SPEAKER
ASSEMBLY
N.O.
N.C.
HANDLE
SWITCH
+
+
+
-
-
-
FIGURE 1
BLOCK DIAGRAM
ACR/EM-2BA PORTABLE SAFETY MEGAPHONE
4.0 CLEANING
4.1
External surfaces of the megaphone may be cleaned with a soft cloth,
dampened in a solution of mild household detergent. Do not immerse in
water or use strong solvents. Clean electrical contacts with cloth
dampened with isopropyl alcohol.
5.0 BATTERY
REPLACEMENT
(see Figure 2)
5.1
The power supply used in the megaphone consists of six standard 1 ½ volt
“AA” size batteries. Current drain is minimal (25 mA) with the
megaphone “ON”, and increases when the user speaks into the
microphone.
Y1-03-0057 Rev. F
4
