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SHUTDOWN. - TM-5-4210-229-14P_84
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TM-5-4210-229-14P Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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OPERATION OF RESCUE SAW.
TM5-42 10-229-1 4&P 2-13.  OPERATION OF SIREN/PUBLIC ADDRESS SYSTEM. The siren/public address system provides three siren signals with manual or automatic operation and a PA system and external speaker to direct personnel outside the cab. Operation of the system is as follows: Do not turn on siren amplifier unless front mounted speaker siren wires are connected. a.   Rotate  ON/OFF  PA  volume  control  knob  (3,  figure  2-5)  clockwise  to  activate  siren/public  address  system. Further rotation of the knob increases voice volume when the amplifier is used for PA or radio amplification. The control knob does not control siren volume. b. For siren operation, select desired tone on selector switch (2, figure 2-5). The selector switch has five posi- tions: (1) RADIO. In this position, incoming radio messages are amplified by the siren and rebroadcast over the external speakers. Siren tones (WAIL, YELP, HI-LO) do not operate in this position. (2) STANDBY. In this position, it is possible to operate the siren by activating the manual pushbutton.  A WAIL tone will be produced using the manual pushbutton. (3) WAIL.  In  this  position,  the  siren  produces  a  continuous  WAILING  sound  up  and  down  in  frequency. Depressing the manual pushbutton will produce the YELP tone. (4) YELP. In this position, a continuous rapid warbled tone is generated. Depressing the manual pushbut- ton will have no effect. (5) HI-LO. In this position, a two-tone sound will be heard. Depressing the manual pushbutton will produce the YELP tone. The pushbutton has no effect when the selector switch (2) is in RADIO. c.   The manual pushbutton (1, figure 2-5) operates the electronic siren in the manual operation mode.  The push button has no effect when the selector switch (2) is in RADIO. (1) It produces the WAIL tone when the selector switch is in STANDBY. (2) It produces the YELP tone when the selector switch is in WAIL. (3) It has no effect when the selector switch is in YELP. (4) It produces the YELP tone when the selector switch is in HI-LO. 2-14.  OPERATION OF THE INVERTER. The  inverter  designed  to  provide  120  volt,  60  Hz  AC  power  from  the  DC  output  of  the  12  volt  vehicle  electrical system to operate all tools, lights, and receptacles as required in various firefighting operations. The inverter oper- ating controls are located on the instrument panel (20, figure 2-4), and on the inverter. 2-59

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